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CN113899048A - Device and method for monitoring oxidation degree of silver-containing nanofiber membrane - Google Patents

  • ️Fri Jan 07 2022
Device and method for monitoring oxidation degree of silver-containing nanofiber membrane Download PDF

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Publication number
CN113899048A
CN113899048A CN202111244722.8A CN202111244722A CN113899048A CN 113899048 A CN113899048 A CN 113899048A CN 202111244722 A CN202111244722 A CN 202111244722A CN 113899048 A CN113899048 A CN 113899048A Authority
CN
China
Prior art keywords
nanofiber membrane
silver
parameter
degree
oxidation
Prior art date
2020-03-23
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111244722.8A
Other languages
Chinese (zh)
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CN113899048B (en
Inventor
周清峰
陈卓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Shengsanyou Electronics Co ltd
Original Assignee
Ai Gan Technology Guangdong Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
2020-03-23
Filing date
2020-03-23
Publication date
2022-01-07
2020-03-23 Application filed by Ai Gan Technology Guangdong Co ltd filed Critical Ai Gan Technology Guangdong Co ltd
2020-03-23 Priority to CN202111244722.8A priority Critical patent/CN113899048B/en
2022-01-07 Publication of CN113899048A publication Critical patent/CN113899048A/en
2023-08-01 Application granted granted Critical
2023-08-01 Publication of CN113899048B publication Critical patent/CN113899048B/en
Status Active legal-status Critical Current
2040-03-23 Anticipated expiration legal-status Critical

Links

  • 239000012528 membrane Substances 0.000 title claims abstract description 214
  • 239000002121 nanofiber Substances 0.000 title claims abstract description 209
  • BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 124
  • 229910052709 silver Inorganic materials 0.000 title claims abstract description 103
  • 239000004332 silver Substances 0.000 title claims abstract description 103
  • 230000003647 oxidation Effects 0.000 title claims abstract description 88
  • 238000007254 oxidation reaction Methods 0.000 title claims abstract description 88
  • 238000012544 monitoring process Methods 0.000 title claims abstract description 31
  • 238000000034 method Methods 0.000 title claims abstract description 11
  • 238000012545 processing Methods 0.000 claims abstract description 47
  • 239000002042 Silver nanowire Substances 0.000 claims abstract description 38
  • -1 silver ions Chemical class 0.000 claims abstract description 25
  • 238000012806 monitoring device Methods 0.000 claims abstract description 5
  • 238000001914 filtration Methods 0.000 claims description 61
  • 230000003749 cleanliness Effects 0.000 claims description 45
  • 239000000428 dust Substances 0.000 claims description 37
  • 230000002500 effect on skin Effects 0.000 claims description 19
  • 230000001954 sterilising effect Effects 0.000 claims description 17
  • 238000004659 sterilization and disinfection Methods 0.000 claims description 17
  • 230000001105 regulatory effect Effects 0.000 claims description 11
  • 238000011144 upstream manufacturing Methods 0.000 claims description 11
  • 230000005674 electromagnetic induction Effects 0.000 claims description 8
  • 238000009825 accumulation Methods 0.000 claims description 7
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  • 238000011156 evaluation Methods 0.000 abstract description 4
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  • 238000010276 construction Methods 0.000 description 13
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  • 238000007791 dehumidification Methods 0.000 description 11
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  • 238000005259 measurement Methods 0.000 description 8
  • VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
  • 239000002245 particle Substances 0.000 description 8
  • 238000009987 spinning Methods 0.000 description 8
  • FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 6
  • 230000000694 effects Effects 0.000 description 6
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  • NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 4
  • XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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  • 102000004190 Enzymes Human genes 0.000 description 2
  • 108090000790 Enzymes Proteins 0.000 description 2
  • QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
  • RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
  • 230000002378 acidificating effect Effects 0.000 description 2
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  • 238000004140 cleaning Methods 0.000 description 2
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  • 239000012535 impurity Substances 0.000 description 2
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  • 229910001923 silver oxide Inorganic materials 0.000 description 2
  • 238000001179 sorption measurement Methods 0.000 description 2
  • 238000011100 viral filtration Methods 0.000 description 2
  • MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
  • 230000005856 abnormality Effects 0.000 description 1
  • 230000003044 adaptive effect Effects 0.000 description 1
  • XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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  • 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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  • JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
  • 239000012811 non-conductive material Substances 0.000 description 1
  • 238000002161 passivation Methods 0.000 description 1
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Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to a device and a method for monitoring the oxidation degree of a silver-containing nanofiber membrane, which at least comprise a data acquisition unit (300) and a data processing unit (400), wherein under the condition that voltage is applied to the nanofiber membrane (200), the data acquisition unit (300) acquires electrical property parameters of the nanofiber membrane containing silver ions and/or silver nanowire components, and the data processing unit (400) determines the oxidation degree of the nanofiber membrane based on the relation between the electrical property parameters and the oxidation degree of silver. The monitoring device can more rapidly monitor the oxidation loss degree of the nanofiber membrane through the electrical property parameters of the silver structure part, and has accurate evaluation and small error.

Description

Device and method for monitoring oxidation degree of silver-containing nanofiber membrane

The invention relates to an air dustproof management system and an air quality detection system, which have the application number of 202010210619.0 and the application date of 3-23.2020, and are filed as divisional applications of invention patents of the invention.

Technical Field

The invention relates to the technical field of air environment protection, in particular to a device and a method for monitoring the oxidation degree of a silver-containing nanofiber membrane.

Background

The dust screen of current building site is very limited to PM 2.5's filter effect, leads to a lot of dustproof measures to all flow in the surface effect not good, in view of new round big capital construction, effectual dustproof haze prevention measure is imperative. The totally-enclosed green dustproof construction factory shed which is gradually popularized at present has the problem of poor ventilation. The nanofiber material has the advantage of high-efficiency filtration. Under the situation that the current air pollution causes great harm to human health, the nanofiber material is applied to the fields of dust emission filtration, automobile exhaust emission filtration, haze masks and the like.

For example, chinese patent CN 108914220 a discloses a dust removing device, which comprises a liquid pump, a spinning needle, a collecting plate, a heater, and a recovery tank, wherein a spinning solution is stored in the recovery tank, an input end of the liquid pump is communicated with the recovery tank through a pipeline, and an output end of the liquid pump is connected with the spinning needle; the spinning needle is attached with a 2-30KV high-voltage electrostatic field, the collecting plate is obliquely arranged below the spinning needle, and the heater is arranged on the spinning needle; the spinning needle ejects spinning solution to form nano fibers under the action of a high-voltage electrostatic field; the nano-fiber meets the gas to be filtered to adsorb dust in the gas; the nanometer fiber falls onto the collecting plate and is heated into a molten state by the heater to flow back to the recovery tank, so as to form a circulating dust removal system.

Chinese patent CN 108392924 a discloses a mining nanofiber membrane wet filter dust collector, which is characterized in that: mainly include the dust remover casing, the spraying subassembly, filtering component, methane adsorption equipment, axial fan, the supporting leg, pressure regulating valve, the manometer, water pressure equipartition chamber and bilge pit, install the spraying subassembly to export the direction along the entry in proper order in the dust remover casing, filtering component, methane adsorption equipment and axial fan, the spraying subassembly is fixed with the bottom plate of dust remover casing, and connect gradually water pressure equipartition chamber through the screw thread, manometer and pressure regulating valve, the dust remover casing passes through the bolt with axial fan and is connected. The filtering component consists of a nanofiber membrane layer, a substrate layer and a geogrid-shaped outer frame, wherein the nanofiber membrane is prepared from a hydrophobic material, and the surface hydrophobic modification treatment is carried out by adopting template hot pressing and vacuum plasma with micrometer-scale protrusions. The dust remover realizes the surface filtration of wet dust removal, solves the problem that a filter screen of the wet filter dust remover is easy to block, has the advantage of high filtration efficiency, can adsorb methane in air flow, and eliminates the hidden trouble of methane on the safe operation of an axial flow fan.

As described above, the prior art has largely used nanofiber membranes as filtration modules for dust removal. However, how to monitor the air quality through the nanofiber membrane and how to monitor the service life of the nanofiber membrane are technical problems that cannot be solved.

In the prior art, no technical scheme for monitoring and evaluating the oxidation degree of the nanofiber membrane by utilizing the skin effect exists at present.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a dustproof management system for a construction plant shed, which at least comprises an air circulation unit, a filtering unit, a data acquisition unit and a data processing unit, wherein the air circulation unit, the filtering unit, the data acquisition unit and the data processing unit are formed by at least one air circulation device, the filtering unit forms the whole or part of the main body of the plant shed, and the dustproof management system is characterized in that the filtering unit at least comprises a nano fiber membrane filter screen containing silver ions and/or silver nano wire components, and at least one air circulation device is provided with at least one nano fiber membrane containing silver ions and/or silver nano wire components. The filter screen of the factory shed in the prior art can only filter coarse particles, but cannot filter fine particles, and the probability of pneumoconiosis of construction workers is higher. According to the invention, the silver-containing nanofiber membrane is arranged on the filter screen, so that particles with various sizes can be filtered according to requirements, and especially bacterial virus particles with the particle size of 0.1-0.3 micrometer can be filtered according to requirements, so that the amount of dust in a factory shed entering the environment is small, and the filtering effect is better. The data processing unit calculates a filtration state parameter of the nanofiber membrane related to an air quality parameter based on the electrical property parameter of the silver structure portion of the nanofiber membrane collected by the data collecting unit, thereby evaluating the filtered air quality parameter based on the filtration state parameter. The filtering function of the filter screen has service life, and the efficiency of identifying and judging by human eyes is very low if the filtering function of the filter screen is in an effective state. The service life of the nanofiber membrane is calculated and analyzed according to the silver oxidation degree of the nanofiber membrane, so that the cleanliness degree and the time for replacement can be judged based on the silver loss degree of the nanofiber membrane, the environment pollution caused by a large amount of dust can be avoided, and the effectiveness of a filter screen can be maintained. Particularly, the nanofiber membranes in the air circulation devices at different positions can be installed on the same day as the filter screen in the filter unit and can filter in the same direction, so that the loss degree and the cleanness degree of the filter screen with a large area are sampled, and the data processing unit can conveniently evaluate the integral filtering efficiency of the filter screen. Preferably, a plurality of air circulation devices for inputting air can be arranged in the plant shed in a mode of penetrating through the filter screen, and the silver ions or silver nanowires in the nanofiber membrane can sterilize viruses or bacteria, so that the air input in the plant shed does not contain viruses.

In the prior art, for a large-scale construction plant shed, the construction period is long, the using area of a filter screen is large, and the cost for using and replacing the filter screen is high, so that the technical problem to be solved is to further maintain the air quality based on the reduction of the silver oxidation degree and the cleanness degree of a nanofiber membrane. I.e., how the various air circulation devices are started and operated in order to maintain the stability of the air quality requires system coordination. The dustproof management system further comprises a control unit, wherein the control unit is connected with at least one data acquisition unit and/or at least one data processing unit, and the control unit adjusts the starting number and ventilation parameters of at least one air circulation device in the air circulation unit in a self-adaptive mode based on the silver oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane sent by the data processing unit. The parameters of the degree of silver oxidation and/or degree of cleanliness decrease, and the air quality thereof inevitably decreases. When the silver oxidation degree parameter and/or the cleanness degree parameter are/is reduced to a set threshold value, the control unit improves the air quality through orderly coordinating the air circulation device, for example, a new air circulation device is started, the ventilation quantity is increased, the air circulation path is changed, and the like, so that the filtering area of a new nanofiber membrane is increased, and the air quality is improved. Preferably, the increase of the opening of the coordinated air circulation device also facilitates the replacement of the old nanofiber membrane reaching the lifetime without affecting the construction progress.

The factory shed often wets the dust in order effectively that the dust fall can increase humidification device for long-term construction, makes its decline fast. However, the moisture in a large amount is not favorable for prolonging the service life of the nanofiber membrane. Moisture accelerates the degree of oxidation of the nanofiber membrane and the degree of dust accumulation. The control unit adjusts the starting of at least one auxiliary filtering component, a dehumidifying component and/or a speed regulating component arranged upstream or downstream of the air flow of the nanofiber membrane and the working parameters thereof until the air quality parameter is restored to be within the air quality threshold value range on the basis of the curve change rate of the silver oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane. The invention has the advantages that the auxiliary filtering component, the dehumidifying component and/or the speed regulating component are/is arranged, so that the oxidation loss of silver ions or silver nanowires is reduced, and the service life of the nanofiber membrane is prolonged. Since the air humidity has a large influence on the parameter fluctuation when the skin effect parameter of the nanofiber membrane is evaluated. Therefore, accurate judgment of the humidity, especially the humidity on the surface of the nanofiber membrane, is a technical challenge with high precision. To this end, the present invention provides, in addition to a conventional dehumidifying element disposed upstream or downstream of the air flow, a forced dehumidifying element, which may be interposed as required, immediately upstream of the nanofiber membrane in the air flow path. The forced dehumidification component can be realized by means of an air conditioning refrigeration cycle, for example, and can not only be periodically inserted into the upstream airflow of the nanofiber membrane for eliminating accumulated moisture on the fiber membrane so as to prolong the service life of the fiber membrane; furthermore, the forced dehumidification module can be brought into operation at a higher operating power when at least one filtration state parameter shows in a sudden manner that the lifetime of the nanofibrous membrane is about to expire or even has expired, so that the nanofibrous membrane is subjected to a secondary monitoring in a significantly drier condition, thereby excluding the disturbances due to moisture more accurately. Therefore, for the factory shed constructed for a long time, the effective air dustproof management system can effectively reduce dust, prolong the service life of the nanofiber membrane and reduce the replacement cost of the filter screen. Particularly, the replacement of the nanofiber membrane filter screen has the defects of not only replacement cost, but also influence on the construction progress due to the replacement of a large number of nanofiber membrane filter screens, so that the service life of the nanofiber membrane is prolonged. And for the auxiliary filtering assembly, the dehumidifying assembly and/or the speed regulating assembly, the replacement cost is low, and most parts can be recycled.

Preferably, in the case where the nanofiber membrane is applied with a voltage, the data processing unit estimates an air quality parameter based on the filtration state parameter of the corresponding nanofiber membrane determined from the electrical property parameter variation curve. The air quality is evaluated only by the electrical property parameters at a certain moment, the change of the electrical property parameters is beneficial to reflecting the loss speed of the nanofiber membrane on the whole, and the change condition of the air quality is known, so that the air quality is evaluated more objectively.

Based on the characteristics that the current, the voltage and the resistance are uniformly distributed in the conductor under the condition of direct current voltage, the electrical property parameters are more stable and easier to monitor. Under the condition that the direct current voltage is applied to the nanofiber membrane, the data processing unit determines the oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane on the basis of at least one electrical property parameter monitored by the data acquisition unit and curve change of the electrical property parameter. In the case of silver oxidation, there is a certain correlation between the degree of silver oxidation and the electrical performance parameter. According to the invention, the silver oxidation degree parameter and/or the cleanliness degree parameter are/is determined through the correlation between the silver oxidation degree and the electrical property parameter, so that the sterilization efficiency parameter of the nanofiber membrane can be evaluated, and the air quality after filtration is further determined.

Preferably, the characteristics of the skin effect of the electric conductor under the condition of applying alternating current are favorable, and the aging condition can be judged more quickly and accurately by using the skin effect because the silver ion passivated aluminum preferentially occurs on the surface. The data processing unit determines an oxidation degree parameter and/or a cleanliness degree parameter of the nanofiber membrane related to the evaluation of the filtering capacity based on the curve change of at least one electrical property parameter and/or electromagnetic induction parameter related to the skin effect under the condition that the nanofiber membrane applies an alternating voltage. Based on the skin effect, the silver conductor in the nanofiber membrane can realize the conduction of a hollow structure, so that the quality of the nanofiber membrane is reduced, and the monitoring difficulty of vibration parameters is reduced. The air quality monitoring effect of the nanofiber membrane is ensured under the condition of reducing the manufacturing cost. Compared with direct current voltage, the alternating current applied voltage has the advantages that the direct current is unidirectional, the anode and the cathode cannot be interchanged, and the electrical performance parameters are easy to cause inaccurate data due to larger data errors in the test mode and the test direction. The alternating current at two ends of the alternating voltage is periodically changed along with time in magnitude and direction, and the alternating current has no positive and negative electrodes, so that the defect of inaccurate electrical property parameter measurement under the condition of unidirectional current is avoided. By adopting alternating voltage, the power supply can be easily connected in daily life, the measured electrical performance parameters are accurate under the condition of current change, and larger data errors are not easy to be generated due to interference of objective test conditions. The alternating current can also generate inductance and capacitance, and more measuring modes of electrical performance parameters can be generated, so that the measurement of the electrical performance parameters is easier to match and adapt to the use environment, and errors and interference caused by matching are further reduced. Particularly, compared with the silver nanowire with a hollow structure, the capacitance voltage of the hollow structure is more stable and is less interfered by impurities with oxidation degree when the alternating voltage is used for measurement. Compared with the silver nanowire with a hollow structure, the direct-current voltage has larger current instability, and the obtained electrical property parameters are inaccurate and high. Preferably, the alternating voltage range of the silver nanofiber membrane is 2-20V, so that the measurement of the electrical property parameter change formed by the silver oxidation degree is facilitated, and the sensitivity is high.

Preferably, the humidity in the factory shed is higher, which is not beneficial to the human health of constructors, and is also not beneficial to prolonging the service life of the nanofiber membrane. Therefore, the data acquisition unit of the present invention further comprises a humidity sensor, and the control unit adjusts the operating parameters of at least one dehumidification assembly in such a way that the humidity parameters of the nanofiber membrane are reduced below a specified calibration threshold value when the humidity parameters of the humidity sensor reach a humidity threshold value or the electrical performance parameters acquired by the data acquisition unit change abnormally. Under the condition of higher humidity, the invention can increase the dehumidification efficiency by adjusting the dehumidification component, is beneficial to improving the air quality and is also beneficial to prolonging the service life of the nanofiber membrane.

The data acquisition unit at least further comprises a vibration acquisition assembly for acquiring vibration parameters of the nanofiber membrane, and under the condition that the nanofiber membrane is in a working state, the data processing unit evaluates a second cleanliness parameter and/or a wind resistance parameter of the nanofiber membrane based on the vibration parameters sent by the vibration acquisition assembly. The air quality is evaluated only by means of the electrical performance parameters, and the situation that the data is inaccurate due to abnormal electrical performance parameters or data acquisition faults is not easy to find, so that a data calibration mechanism is also important. The invention can form the cleanliness parameter estimated by the vibration parameter and the cleanliness parameter determined by the electrical property parameter into mutual reference data, and monitor and correct the data acquisition unit under the condition that the difference between the two data is larger, thereby being beneficial to finding out the fault of the data acquisition unit and maintaining in time and ensuring the normal operation of the air quality monitoring sensor.

Specifically, the control unit performs data calibration of the data collection unit based on a difference value of a first degree of cleanliness parameter evaluated from an oxidation degree parameter of the nanofiber membrane and a second degree of cleanliness parameter evaluated from a vibration parameter of the nanofiber membrane. The calibration mechanism can effectively find the abnormal collection of the electrical performance parameters or the abnormal calculation of the data processing unit, thereby improving the fault finding efficiency of the system and avoiding the damage to human health caused by the rapid reduction of the air quality.

The invention also relates to an air quality detection system, which at least comprises an air circulation device, a filtering unit, a data acquisition unit and a data processing unit, wherein the filtering unit at least comprises a nanofiber membrane filter screen containing silver ions and/or silver nanowire components, the filtering unit is arranged in an air flow pipeline of the air circulation device, and the data processing unit calculates the filtering state parameters of the nanofiber membrane related to the air quality parameters on the basis of the electrical performance parameters of the silver structure part of the nanofiber membrane acquired by the data acquisition unit at set time intervals, so that the filtered air quality parameters are evaluated on the basis of the filtering state parameters. The air quality detection system of the invention realizes supervision of air quality by sampling and detecting the air quality at regular time or irregular time.

The air quality detection system further comprises a control unit, wherein the control unit is respectively connected with at least one data acquisition unit and/or at least one data processing unit, and the control unit adjusts the starting number and the ventilation parameters of at least one air circulation device in the air circulation unit in a self-adaptive mode based on the silver oxidation degree parameter and/or the cleanness degree parameter of the nanofiber membrane sent by the data processing unit. The air quality is evaluated through the electrical performance parameters, and the air circulation device is adjusted based on the state of the air quality, so that the air quality is favorably improved while the air quality is detected.

The invention also provides a device for monitoring the oxidation degree of the silver-containing nanofiber membrane, which at least comprises a data acquisition unit and a data processing unit, wherein under the condition that the nanofiber membrane is applied with voltage, the data acquisition unit acquires the electrical property parameters of the nanofiber membrane containing silver ions and/or silver nanowire components, and the data processing unit determines the oxidation degree of the nanofiber membrane based on the relationship between the electrical property parameters and the silver oxidation degree.

Preferably, the data processing unit determines the oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane based on a variation curve of at least one electrical property parameter and/or electromagnetic induction parameter related to the skin effect under the condition that the nanofiber membrane applies the alternating voltage.

Preferably, the data processing unit determines the sterilization efficiency parameter of the nanofiber membrane to air based on the degree of oxidation of silver and the correlation between the degree of oxidation and the sterilization efficiency.

Preferably, the oxidation degree monitoring device further comprises a control unit, the control unit is connected with at least one data acquisition unit and/or at least one data processing unit, and the control unit adjusts the start-up and the operating parameters of at least one filtering component, dehumidifying component and/or speed regulating component arranged upstream or downstream of the air flow of the nanofiber membrane in a manner of reducing the oxidation speed of the silver structure part containing silver ions and/or silver nanowire components in the nanofiber membrane.

Preferably, in case of dust accumulation of the nanofibrous membrane to a threshold value, the control unit activates the governor assembly to increase the wind speed, thereby promoting the circulation of air and reducing the dust accumulation.

Preferably, the data acquisition unit further comprises at least a vibration acquisition component for acquiring vibration parameters of the nanofiber membrane, and the data processing unit evaluates the second cleanliness parameter and/or the wind resistance parameter of the nanofiber membrane based on the vibration parameters sent by the vibration acquisition component when the nanofiber membrane is in a working state.

Preferably, the control unit performs data calibration of the data collection unit based on a difference value of a first degree of cleanliness parameter evaluated from an oxidation degree parameter of the nanofiber membrane and a second degree of cleanliness parameter evaluated from a vibration parameter of the nanofiber membrane.

The invention also provides a method for monitoring the oxidation degree of the silver-containing nanofiber membrane, which at least comprises the following steps: under the condition that the nanofiber membrane is applied with voltage, collecting electrical property parameters of the nanofiber membrane containing silver ions and/or silver nanowire components, and determining the oxidation degree of the nanofiber membrane based on the relation between the electrical property parameters and the oxidation degree of silver.

Preferably, the method further comprises: determining an oxidation degree parameter and/or a cleanliness degree parameter of the nanofiber membrane based on a variation curve of at least one electrical property parameter and/or electromagnetic induction parameter related to skin effect under the condition that an alternating voltage is applied to the nanofiber membrane.

Preferably, the method further comprises: and determining the sterilization efficiency parameter of the nanofiber membrane to the air based on the oxidation degree of the silver and the correlation between the oxidation degree and the sterilization efficiency.

Drawings

FIG. 1 is a schematic of the infrastructure of the air dust management system of the present invention; and

fig. 2 is a schematic block diagram of the air dust management system of the present invention.

List of reference numerals

100: a filtration unit; 200: a nanofiber membrane; 300: a data acquisition unit; 400: a data processing unit; 500: a control unit.

Detailed Description

The following detailed description is made with reference to the accompanying drawings.

The electrical property parameters of the invention include not only resistance, current, voltage, magnetic flux related to electromagnetic induction, and magnetic induction intensity, but also any parameter calculated based on the resistance, current, voltage, magnetic flux, and magnetic induction intensity.

The data acquisition unit in the present invention refers to a circuit or an integrated circuit capable of monitoring electrical property parameters of the nanofiber membrane, or a component capable of directly calculating required electrical property parameters, such as a current test component, a voltage test component, a resistance test component, a magnetic flux, a magnetic induction intensity test component, and the like.

The air dustproof management system can also be an air conditioning system and equipment, an air quality monitoring system and equipment, an evaluation/prediction device and system of a nanofiber membrane loss state, a nanofiber membrane service life evaluation device and system, or an air conditioning management system based on a nanofiber membrane.

The filtration state parameters of the nanofiber membrane at least comprise an oxidation degree parameter, a filtration parameter, a wind resistance parameter, a cleanliness parameter, a vibration parameter and the like.

Example 1

The invention relates to a dustproof management system for a construction plant shed, which at least comprises an

air circulation unit

100, a

filter unit

200, a

data acquisition unit

300 and a

data processing unit

400, wherein the

air circulation unit

100, the

filter unit

200, the

data acquisition unit

300 and the

data processing unit

400 are formed by at least one air circulation device, and the filter unit forms all or part of the main body of the plant shed. As shown in fig. 1, the

filtering unit

200 may be a main body disposed on the framework of the factory shed, or may be disposed on a non-load-bearing portion of the factory shed main body. The filter unit comprises at least a nanofiber membrane screen containing silver ions and/or silver nanowire components, and is capable of filtering particles, especially virus particles, based on finer pore sizes. The filter unit is more beneficial to air interaction at two sides, and meanwhile, the air pollution environment in the plant shed is intercepted, and viruses can be effectively prevented from entering the plant shed.

As shown in fig. 1, at least one air circulation device is provided with at least one nanofiber membrane containing silver ions and/or silver nanowire components. At least one air circulation device is arranged in a manner to extend through the filter unit. Preferably, the air circulation device is a device capable of promoting air circulation, such as a fan, an air pump, or the like.

In the

nanofiber membrane

200 of the present invention, the conductive host is silver. On one hand, the silver surface is easy to generate monovalent silver ions Ag + when meeting water, on the other hand, the silver surface is easy to oxidize in the air to generate silver oxide AgO, and under the action of water, the silver oxide is hydrolyzed to generate divalent silver ions Ag2+And hydroxyl. The two silver ions can be rapidly combined with enzyme protein in the thallus, so that the enzyme loses activity and the metabolism process of biomolecules is destroyed. After the reaction, a part of silver ions are dissociated from dead bacteria and continue to be sterilized, and meanwhile, a part of silver ions are remained in the dead bacteria and exist in the form of a silver-biomolecule compound. With the continuous contact with the thallus, the silver ions are continuously lost, so the reaction of silver oxidized into silver ions is continuously carried out to realize chemical equilibrium, and the silver content is reduced. Since the conductive main body in the nanofiber membrane is silver, the conductivity of the nanofiber membrane tends to be gradually reduced along with the increase of the oxidation degree of silver and the gradual reduction of the content of silver, and the sterilization efficiency also tends to be reduced. Thus, several tests have been performed to obtain a relationship between electrical performance parameters and the degree of silver oxidation. The degree of silver oxidation can also reflect the degree of silver loss. The silver oxidation degree and the sterilization efficiency have a correlation relationship, and the correlation coefficient can be obtained through testing. The correlation is in accordance with a pattern of a ═ xB, and the specific value of x is obtained by the test. Further, sulfur dioxide and nitrogen dioxide present in the air easily react in the air and combine with fine particles to form acidic fumes such as sulfuric acid fumes, photochemical fumes, and the like. After passing through the

nanofiber membrane

200, the acidic fumes tend to oxidize the silver, which in turn reduces the conductivity of the membrane. By detecting changes in the electrical coefficient of properties of the

nanofiber membrane

200 over a period of time, a parameter or grade of air quality can be assessed.

Therefore, the

nanofiber membrane

200 can detect fine particles such as viruses and bacteria in the air, and the sterilization efficiency parameter of the

nanofiber membrane

200 to the air is determined according to the silver oxidation degree or the loss degree of the viruses to the silver nanowires. The higher the sterilization efficiency parameter, the higher the air quality parameter through the

nanofiber membrane

200. Therefore, the present invention performs monitoring of air quality by monitoring the filtration state of the silver nanofiber membrane.

Preferably, the silver ions or silver nanowires in the nanofiber membrane can be arranged according to a certain proportion. Silver ions or silver nanowires in the nanofiber membrane can exist at the same time, and the ratio of the silver ions to the silver nanowires can be set according to needs. The advantage of so setting up lies in, through adjusting the ratio of silver ion or silver nano wire, can construct the

nanofiber membrane

200 or air quality monitoring sensor and the dustproof management system of air of different filtration parameters and sterilization efficiency parameter, construct the

nanofiber membrane

200 of different life promptly, and then apply to different air dustproof places. For example, the air dust control system is suitable for places with heavy air pollution, high dust concentration, or dense personnel such as construction sites, and the like, and is composed of the

nanofiber membrane

200 with high silver ion or silver nanowire proportion and long service life. The nano fiber film has low silver ion or silver nanowire proportion and has a general service life, and is used for an air quality monitoring sensor consisting of the

nano fiber film

200 in a household environment with less air pollution and less dust, or a classroom and a conference room.

The data processing unit of the present invention calculates a filtration state parameter of the nanofiber membrane related to an air quality parameter based on the electrical property parameter of the silver structure portion of the nanofiber membrane collected by the data collecting unit, thereby evaluating the filtered air quality parameter based on the filtration state parameter. Aiming at the problems that the service life of an air filter screen cannot be monitored and predicted and the quality of the filtered condition cannot be detected under the condition that a special air quality sensor is not used in the prior art, the invention calculates and analyzes the quality of the filtered air by monitoring the electrical conductivity of the silver-containing nanofiber membrane of the filtered air, thereby realizing the integrated monitoring and detection of the nanofiber membrane and the air quality.

Preferably, the system further comprises a

control unit

500, wherein the

control unit

500 is connected with at least one

data acquisition unit

300 and/or at least one

data processing unit

400. The control unit is preferably an application specific integrated chip, a single chip, a server or a server cluster which can perform data association, logic operation and control instruction sending. The control unit adjusts the starting number and ventilation parameters of at least one air circulation device in the air circulation unit in an adaptive mode based on the silver oxidation degree parameter and/or the cleanness degree parameter of the nanofiber membrane sent by the data processing unit. The invention can further maintain the stability of the air quality and avoid the reduction of the air quality by adjusting the number of the air circulating devices and the working parameters.

Preferably, the control unit adjusts the start-up of at least one auxiliary filtering assembly, dehumidifying assembly and/or speed regulating assembly disposed upstream or downstream of the air flow of the

nanofiber membrane

200 and the operating parameters thereof until the air quality parameter is restored within the air quality threshold range, based on the curve change rate of the silver oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane. For example, the coarse filter membranes are respectively arranged at the two ends of the

nanofiber membrane

200 to preliminarily filter large-particle dust, which is beneficial to reducing the speed of silver oxidation degree and prolonging the service life of the

nanofiber membrane

200, thereby prolonging the monitoring time of the air quality monitoring sensor. For example, a forced dehumidification assembly is provided to maintain the dryness of the nanofiber membrane to reduce the rate of silver oxidation. For example, in the event that dust from the nanofiber membrane accumulates to a certain threshold, the governor assembly is activated to increase the wind speed, thereby facilitating air circulation and reducing dust accumulation. The auxiliary filtering component, the dehumidifying component and/or the speed regulating component are/is favorable for eliminating the interference of common particles on the silver sterilization efficiency and virus filtration, and effectively prolongs the filtering time of high-quality air, namely the service life of the nanofiber membrane.

Preferably, in the case that the

nanofiber membrane

200 is applied with a voltage, the data processing unit estimates an air quality parameter based on the filtration state parameter of the corresponding

nanofiber membrane

200 determined from the electrical property parameter variation curve. For a direct voltage, a current of silver ions or silver nanowires having a conductive property flows through both the center and the surface of the conductor. Therefore, the resistance, current and voltage of the silver nanowires can be directly measured, and other electrical property parameters related to the resistance, current and voltage can also be obtained. By measuring electrical property parameters such as resistance, the corresponding relationship between the resistance change and sterilization efficiency parameters and the corresponding relationship between the resistance change and the degree of cleanliness are tested and calibrated, and the time for replacing the

nanofiber membrane

200 can be determined according to the resistance value change.

Preferably, the pore size of the

nanofiber membrane

200 can be controlled over a wide range by preparing individual fibers of different diameters. For example, the diameter of silver nanowires can be as low as 50 nanometers 0.05 microns, and nanofiber membranes made from silver nanowires of this diameter can have pore sizes below 0.1 microns, enabling filtration of fine particulate matter from 0.1 to 0.3 microns. I.e., the pore size range of the

nanofiber membrane

200 is not greater than 0.1 microns. This arrangement has the advantage that a sufficiently small pore size is effective in blocking fine particulate matter of approximately 0.1-0.3 microns in diameter. The fine particles comprise dust and virus particles, and realize the function of virus filtration. The different filtering effects of the nanofiber membrane filter screen in the filtering unit and the nanofiber membrane in the air circulation device are set by adjusting the aperture of the nanofiber membrane.

The types of electrical performance parameters that can be collected by the dc voltage are less than the types of electrical performance parameters that can be collected by the ac voltage. In the case where the

nanofiber membrane

200 applies an ac voltage, the

data processing unit

400 determines an oxidation degree parameter and/or a cleanliness degree parameter of the

nanofiber membrane

200 related to evaluating a filtering capability based on a curve change of at least one electrical property parameter and/or electromagnetic induction parameter related to a skin effect. The alternating current can also generate an inductor and a capacitor, and a measurement mode of the electrical property parameters can be satisfied, so that the measurement of the electrical property parameters is easier to match and adapt to the use environment, and errors and interference caused by matching are further reduced.

The skin effect in the invention is also called skin effect, when alternating current passes through a conductor, the current is concentrated on the surface of the conductor to flow. When electrons with high frequency are conducted in a conductor, the electrons collect on the surface of the conductor rather than evenly distributed in the cross-sectional area of the whole conductor. For example, in a direct current circuit, the current density is uniform over a uniform conductor cross-section. However, when an alternating current passes through a conductor, the current distribution over the cross-section of the conductor is more and more concentrated towards the surface of the conductor as the frequency increases, so that the small bulb connected to the surface of the conductor is much brighter than the small bulb connected to the middle of the conductor, a phenomenon known as the skin effect.

Thus, in the case of an alternating current across the

nanofiber membrane

200, its electrical performance parameters associated with skin effect and its changes can be monitored. The silver nanowires in the

nanofiber membrane

200 are arranged in a hollow structure, and the conductivity of the silver nanowires is not affected. Because the silver ion passivation occurs on the surface first, the skin effect can be used to judge the silver oxidation degree more quickly and accurately.

The silver nanowires in the

nanofiber membrane

200 of the present invention include silver nanowires having a hollow structure and/or silver nanowires having a non-hollow structure. The silver nanowires with the hollow structures are beneficial to obtaining relevant electrical performance parameters of the

nanofiber membrane

200 according to the skin effect principle under the condition that alternating current passes through, and are beneficial to saving of the use of silver materials. The cavity of the silver nanowire with the hollow structure can be filled with conductive materials or non-conductive materials with other structures according to requirements.

Compared with direct current voltage, the alternating current applied voltage has the advantages that the direct current is unidirectional, the anode and the cathode cannot be interchanged, and the electrical performance parameters are prone to cause inaccurate data due to large data errors in the testing mode and the testing direction. The alternating current at two ends of the alternating voltage is periodically changed along with time in magnitude and direction, and the alternating current has no positive and negative electrodes, so that the defect of inaccurate electrical property parameter measurement under the condition of unidirectional current is avoided. By adopting alternating voltage, the power supply can be set more easily in daily life, and electrical performance parameters measured under the condition of current change are accurate, so that the large data error caused by the interference of objective test conditions is not easy to generate. Compared with the silver nanowire with the hollow structure, the capacitance voltage of the hollow structure is more stable and is less interfered by impurities with oxidation degree by adopting alternating voltage for measurement. Compared with the silver nanowire with a hollow structure, the direct-current voltage has larger current instability, and the obtained electrical property parameters are inaccurate and high. Preferably, the alternating voltage range of the silver nanofiber membrane is 2-20V, electrical property parameters can be measured more easily, and the correlation between the electrical property parameters and the silver oxidation degree or the cleanness degree can be obtained more easily, so that the service life prediction and the air quality evaluation of the nanofiber membrane are more accurate.

Preferably, the data acquisition unit further comprises a humidity sensor. And under the condition that the humidity parameter of the humidity sensor reaches a humidity threshold value or the electrical property parameter collected by the data collection unit is abnormally changed, the control unit adjusts the working parameter of at least one dehumidification assembly in a mode that the humidity parameter of the nanofiber membrane is reduced to be lower than a specified calibration threshold value. To the factory shed of large-scale construction site, humidification devices such as spray set or atomizing device are often set up to carry out the dust fall for the dust in the air subsides fast. The mode is favorable for reducing the dust accumulation on the nanofiber membrane, but the phenomenon of accelerating the silver oxidation speed of the nanofiber membrane also exists due to the fact that the humidity is high. Therefore, the setting of the humidity sensor and the acquisition of the humidity parameters are necessary. Under the condition that the humidity parameter is greater than the set threshold value or the condition that the humidity parameter increases fast, increase the dehumidification dynamics through adjusting the dehumidification subassembly, improve dehumidification efficiency and maintain the degree of dryness of nanofiber membrane for silver ion or silver nano wire in the nanofiber membrane can carry out main contribution to the efficiency of disinfecting, provide sterile air in the factory shed, provide the healthy quality of workman's environment.

Preferably, the data acquisition unit further includes a vibration acquisition component for acquiring a vibration parameter of the

nanofiber membrane

200, and the data processing unit evaluates the second cleanliness parameter and/or the wind resistance parameter of the

nanofiber membrane

200 based on the vibration parameter transmitted by the vibration acquisition component when the

nanofiber membrane

200 is in the working state. The control unit performs data calibration of the data collection unit based on a difference value of a first cleanliness parameter evaluated from an oxidation degree parameter of the nanofiber membrane and a second cleanliness parameter evaluated from a vibration parameter of the nanofiber membrane. The second degree of cleanliness parameter of the

nanofiber membrane

200 obtained by the vibration parameter of resonance can be used as reference data of the first degree of cleanliness parameter determined by the electrical property parameter. Under the condition that the difference value between the first cleanliness parameter and the second cleanliness parameter exceeds the set threshold value, the

data processing unit

400 reselects the electrical property parameter to determine the numerical value of the first cleanliness parameter, so that the accuracy of monitoring data is ensured, and the accuracy and the sensitivity of the air quality monitoring sensor are improved.

Example 2

The invention also provides an air quality detection system which at least comprises an air circulation device, a filtering unit, a data acquisition unit and a data processing unit, wherein the filtering unit at least comprises a nanofiber membrane filter screen containing silver ions and/or silver nanowire components, and the filtering unit is arranged in an air flow pipeline of the air circulation device. The data processing unit calculates a filtration state parameter of the nanofiber membrane related to an air quality parameter based on the electrical property parameter of the silver structure portion of the nanofiber membrane acquired by the data acquisition unit at set time intervals, thereby evaluating the filtered air quality parameter based on the filtration state parameter.

Compared with the device for collecting different air components to detect the air quality in the prior art, the air quality detection system provided by the invention can obtain the oxidation degree and the cleanliness degree by detecting the electrical performance parameters of the silver in the nanofiber membrane, so that the air quality after filtration can be effectively evaluated. The invention can detect the air quality of the introduced air only by combining with the air system and arranging the air inlet of the indoor air of the air system. The invention does not need to be provided with a plurality of sensors and does not need to know the specific gas components of the air, so the invention has smaller volume, lighter weight and low cost. The invention can also carry out virus sterilization on the passing air, so that the air passing through the air quality detection device is beneficial to the health of human bodies. The invention can be in data connection with an air system, a safety system, a monitoring system, an electric power system and the like in a building, is convenient for the comprehensive management of managers, ensures the air quality in a construction plant shed and the building, and improves the life quality in the building.

Preferably, the system air quality detection system further comprises a control unit, the control unit is respectively connected with at least one data acquisition unit and/or at least one data processing unit, and the control unit adjusts the starting number and the ventilation parameters of at least one air circulation device in the air circulation unit in a self-adaptive manner based on the silver oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane sent by the data processing unit. It is advantageous to regulate the overall quality of the air again based on the reduction in air quality based on the degree of silver oxidation. The comprehensive regulation and control of the arrangement of the air circulation devices at multiple positions can make up the condition that the air quality of a single air circulation device is reduced, and maintain the stability of the air quality.

In the air quality detecting system of the present invention, the control unit adjusts the start-up of at least one auxiliary filtering component, dehumidifying component and/or speed regulating component disposed upstream or downstream of the air flow of the

nanofiber membrane

200 and the operating parameters thereof until the air quality parameter is restored within the air quality threshold range, based on the curve change rate of the silver oxidation degree parameter and/or the cleanliness degree parameter of the nanofiber membrane. The curve change rate of the oxidation degree parameter and/or the cleanliness degree parameter is increased, which shows that the oxidation degree is accelerated, the cleanliness degree is rapidly reduced, and the arrangement of the auxiliary filtering component, the dehumidifying component and/or the speed regulating component is favorable for delaying the silver oxidation speed, so that the silver of the nanofiber membrane is mainly sterilized, the service life is prolonged, and the detection sensitivity of the air quality is improved.

Preferably, in the air quality detecting system of the present invention, in the case where the voltage is applied to the

nanofiber membrane

200, the data processing unit estimates the air quality parameter based on the filtration state parameter of the corresponding

nanofiber membrane

200 determined from the electrical property parameter variation curve.

In the case where the

nanofiber membrane

200 applies an ac voltage, the

data processing unit

400 determines an oxidation degree parameter and/or a cleanliness degree parameter of the

nanofiber membrane

200 related to evaluating a filtering capability based on a curve change of at least one electrical property parameter and/or electromagnetic induction parameter related to a skin effect. The dc power supply can also implement the air quality detection of the present invention. In real life, the use of alternating voltage is more convenient, voltage conversion is not needed, the stability of voltage testing in the nanofiber membrane can be guaranteed, and the advantage of the voltage testing device is more obvious than that of direct voltage. An alternating voltage is therefore preferred to energize and collect electrical performance parameters.

Preferably, the test ac voltage applied to the

nanofiber membrane

200 is taken directly from the air circulation unit, rather than providing a separate power supply mechanism. This is advantageous because the air circulation unit should normally be set in a deactivated state when the test ac voltage is applied, and the electrical parameters (e.g. voltage and waveform) required by the ac motor used by the air circulation unit are very close to those expected by the test power supply. Moreover, the alternating voltage for testing also needs PWM pulse width modulation to detect the frequency response condition of the

nanofiber membrane

200 for judging the aging characteristic; the control modes of all control parts used by the alternating current motor used by the air circulation unit during speed regulation are mature, and the low-cost high-precision rapid production is facilitated.

Preferably, the data acquisition unit further comprises a humidity sensor, and the control unit adjusts the operating parameters of at least one dehumidification assembly in a manner that the humidity parameters of the nanofiber membrane are reduced below a specified calibration threshold value when the humidity parameters of the humidity sensor reach a humidity threshold value or the electrical performance parameters acquired by the data acquisition unit are abnormally changed. When the skin effect parameters of the silver-containing nanofiber membrane are evaluated, the air humidity has a large influence on parameter fluctuation. The improvement of the accurate judgment degree of the electrical property parameters, particularly the accurate judgment of the surface humidity of the silver-containing nanofiber membrane is a technical challenge with high precision. For this reason, the present invention is provided with a forced dehumidifying element which may be interposed as required immediately upstream of the silver-containing nanofiber membrane in the air flow path, in addition to the conventional dehumidifying element provided upstream or downstream of the air flow. The forced dehumidifying component can not only be inserted into the upstream air flow of the silver-containing nanofiber membrane at regular time for eliminating accumulated moisture on the fiber membrane, so that the service life of the fiber membrane is prolonged, but also can be calibrated for the second time in the environment with higher dryness during calibration, and the interference of external humidity factors is eliminated to obtain more accurate data.

In the air quality detection system of the present invention, the data acquisition unit at least further includes a vibration acquisition component for acquiring a vibration parameter of the

nanofiber membrane

200, and the data processing unit evaluates the second cleanliness parameter and/or the wind resistance parameter of the

nanofiber membrane

200 based on the vibration parameter sent by the vibration acquisition component when the

nanofiber membrane

200 is in a working state. In the air quality detecting system of the present invention, the control unit performs data calibration of the data collecting unit based on a difference value of a first cleanliness degree parameter evaluated from an oxidation degree parameter of the nanofiber membrane and a second cleanliness degree parameter evaluated from a vibration parameter of the nanofiber membrane. Also, the wind resistance parameter may be used as a reference data of the cleanliness. If the variation trend of the wind resistance parameter and the variation trend of the cleanliness degree are opposite and the variation rates are similar, the dust accumulation degree on the nanofiber membrane is consistent. The invention can form the cleaning degree parameter estimated by the vibration parameter and the cleaning degree parameter determined by the electrical property parameter into the cross reference data, which is beneficial to finding out the sudden change abnormality of the data, thereby executing the calibration procedure of the data. For example, in case of data anomalies, the data acquisition unit and the data processing unit are calibrated separately.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. An oxidation degree monitoring device of a silver-containing nanofiber membrane, at least comprising a data acquisition unit (300) and a data processing unit (400), characterized in that,

the data acquisition unit (300) acquires electrical property parameters of the nanofiber membrane containing silver ions and/or silver nanowire components under the condition that the voltage is applied to the nanofiber membrane (200),

the data processing unit (400) determines the degree of oxidation of the nanofiber membrane based on the relationship between the electrical property parameter and the degree of silver oxidation.

2. The device for monitoring the oxidation degree of a silver-containing nanofiber membrane according to claim 1, wherein, when an AC voltage is applied to the nanofiber membrane (200),

the data processing unit (400) determines an oxidation degree parameter and/or a cleanliness degree parameter of the nanofiber membrane (200) based on a variation curve of at least one electrical property parameter and/or electromagnetic induction parameter related to skin effect.

3. The apparatus for monitoring the oxidation degree of silver-containing nanofiber membrane as claimed in claim 1 or 2, wherein the data processing unit (400) determines the sterilization efficiency parameter of the nanofiber membrane (200) for air based on the oxidation degree of silver and the correlation between the oxidation degree and the sterilization efficiency.

4. The silver-containing nanofiber membrane oxidation degree monitoring device according to any one of claims 1 to 3, further comprising a control unit (500), wherein the control unit (500) is connected with at least one data acquisition unit (300) and/or at least one data processing unit (400),

the control unit (500) regulates the activation of at least one filtering, dehumidifying and/or rate regulating assembly arranged upstream or downstream of the air flow of the nanofibrous membrane (200) and its operating parameters in a manner that reduces the oxidation rate of silver moieties containing silver ions and/or silver nanowire components in the nanofibrous membrane.

5. The device for monitoring the degree of oxidation of a silver-containing nanofiber membrane as claimed in any one of claims 1 to 4,

in case dust of the nanofiber membrane accumulates to a threshold value, the control unit (500) activates the governor assembly to increase the wind speed, thereby promoting circulation of air and reducing dust accumulation.

6. The silver-containing nanofiber membrane oxidation degree monitoring device as claimed in any one of claims 1 to 5, wherein the data acquisition unit further comprises at least a vibration acquisition component for acquiring vibration parameters of the nanofiber membrane (200),

the data processing unit (400) evaluates a second cleanliness parameter and/or a wind resistance parameter of the nanofiber membrane (200) based on the vibration parameter sent by the vibration acquisition assembly with the nanofiber membrane (200) in an operational state.

7. The apparatus for monitoring the oxidation degree of a silver-containing nanofiber membrane as claimed in any one of claims 1 to 6, wherein the control unit performs data calibration of the data acquisition unit based on a difference between a first cleanliness parameter evaluated from the oxidation degree parameter of the nanofiber membrane and a second cleanliness parameter evaluated from the vibration parameter of the nanofiber membrane.

8. A method for monitoring the degree of oxidation of a silver-containing nanofiber membrane, comprising at least:

collecting electrical property parameters of the nanofiber membrane containing silver ions and/or silver nanowire components under the condition that voltage is applied to the nanofiber membrane (200),

the degree of oxidation of the nanofiber membrane is determined based on the relationship between the electrical property parameter and the degree of silver oxidation.

9. The method for monitoring the oxidation degree of a silver-containing nanofiber membrane according to claim 1, further comprising:

under the condition that an alternating voltage is applied to the nanofiber membrane (200),

determining an oxidation degree parameter and/or a cleanliness degree parameter of the nanofiber membrane (200) based on a variation curve of at least one electrical property parameter and/or electromagnetic induction parameter related to skin effect.

10. The method for monitoring the degree of oxidation of a silver-containing nanofiber membrane as claimed in claim 8 or 9, further comprising:

determining a sterilization efficiency parameter of the nanofiber membrane (200) to air based on the degree of oxidation of silver and the correlation of the degree of oxidation to sterilization efficiency.

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