CN215780799U - Relief valve, breathe and support equipment gas circuit and breathe and support equipment - Google Patents

The utility model provides a pressure release valve, a gas circuit of a breathing support device and the breathing support device, wherein the pressure release valve comprises a valve body, the valve body is of a hollow structure provided with a gas inlet and a pressure release opening, a diaphragm is arranged at the lower part of the valve body, the gas inlet is communicated with the pressure release opening through a space above the diaphragm, and a driving device is arranged at the lower part of the diaphragm and used for driving the diaphragm to move up and down. The upper part of the pressure relief valve provided by the utility model is simultaneously provided with the air inlet and the pressure relief port, the control of the air flow is realized by controlling the distance between the diaphragm and the pressure relief port, the pressure relief valve provided by the utility model is used for being connected into a branch of an air path of the respiratory support equipment, the air resistance of the air path of the respiratory support equipment can be reduced by connecting one air inlet with a main path of the air path, the pressure control is realized by controlling the pressure relief valve on the branch, two or more pressure relief valves are adopted to be combined in the air path according to the use requirement, the pressure control range is expanded, and the pressure control precision is improved.

Relief valve, breathe and support equipment gas circuit and breathe and support equipment

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a pressure release valve, a breathing support equipment gas circuit and breathing support equipment.

Background

The breathing support equipment (such as a respirator) is used for replacing the breathing function of people or assisting the breathing function of people, is suitable for patients with respiratory failure and even stopping breathing to do artificial breathing, is an important tool for saving the lives of certain critical patients, is widely applied in the medical field, is deeply loved by patients, and is available in the market at present because a turbine is used for supplying air, and the air flow caused by the rotation of the turbine is unstable, so that the air supply pressure and the air flow speed of the turbine are often unstable, and uncomfortable experience is brought to the patients.

The breathing control valve is an important part in the breathing machine, the existing breathing control valve is generally set as a three-way pressure balance valve, when the breathing machine needs to be boosted, the three-way pressure balance valve closes a small release port, and when the pressure sensor monitors that the air pressure reaches a set value, the three-way pressure balance valve is kept unchanged; when the pressure of the breathing machine needs to be reduced, the three-way pressure balance valve increases the release port, and the pressure sensor monitors that the air pressure reaches a set value, so that the three-way pressure balance valve is kept unchanged; the pressure of the air path of the breathing machine is adjusted through closed-loop control. The three-way valve is adopted for control, the inlet and the outlet of the valve are required to be connected into the gas circuit, so that the gas resistance is increased, only one valve is arranged for pressure relief, the pressure relief range is small, and the controllable pressure range is small.

The chinese utility model patent CN101856534A discloses a three-way pressure balance valve and a medical ventilator, the three-way pressure balance valve comprises a three-way integrated pipeline, the three-way integrated pipeline comprises an air source port, a release port and a breathing port, the air source port is directly communicated with the breathing port, a diaphragm is arranged at the inner end of the air source port, and the air source port is communicated with the release port through the upper space of the diaphragm; the diaphragm is connected with a driver for driving the diaphragm to move up and down so as to adjust the size of the gap between the air source port and the release port. After the medical breathing machine is connected with foretell tee bend pressure balance valve, can be through the diaphragm upper and lower action, adjust the clearance size between air supply mouth and the release mouth, the pressure of breathing in and exhaling is controlled respectively, maintain appropriate pressure in breathing in and exhaling the stage, use tee bend pressure balance valve to realize two horizontal pressure, in order to reach best pressure, moreover, the steam circuit need be inserted to simple structure, high durability and convenient use, control is accurate, the air supply mouth and the mouth of breathing of above-mentioned tee bend pressure valve all need insert, cover the resistance that also can increase gas, and through a tee bend valve pressure release, controllable pressure range is less.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the utility model provides a pressure release valve, a breathing support equipment gas circuit and breathing support equipment.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a pressure relief valve, which comprises a valve body, wherein the valve body is of a hollow structure provided with an air inlet and a pressure relief opening, a diaphragm is arranged at the lower part of the valve body, the air inlet is communicated with the pressure relief opening through a space above the diaphragm, and a driving device is arranged at the lower part of the diaphragm and used for driving the diaphragm to move up and down.

In a preferred embodiment, in the pressure relief valve provided by the present invention, the air inlet is disposed at a middle position of an upper portion of the valve body, the number of the pressure relief openings is several, and the several pressure relief openings are respectively disposed around the air inlet.

In a preferred embodiment, in the pressure relief valve provided by the present invention, the driving mechanism is a voice coil motor.

In a preferred embodiment, in the pressure relief valve provided by the utility model, the voice coil motor comprises a housing, a motor shaft is arranged in the middle of the housing, a flexible elastic member is arranged at the upper part of the motor shaft, a coil support is arranged at the lower part of the motor shaft, a coil is fixed on the coil support, and a permanent magnet is arranged outside the coil support.

In a preferred embodiment, in the pressure relief valve provided by the present invention, a guide member is further provided at a lower portion of the motor shaft for ensuring the motor shaft to move linearly.

In a preferred embodiment, in the pressure relief valve provided by the present invention, the guide member is a linear bearing fixed to a lower portion of the motor shaft by a fixing bracket.

In a preferred embodiment, in the pressure release valve provided by the present invention, the flexible elastic member is a flexible elastic sheet, and a plurality of deformation holes are arranged on the flexible elastic sheet, and the deformation holes are arranged in a spiral shape to ensure a deformation degree of the flexible elastic member.

In a preferred embodiment, in the pressure relief valve provided by the utility model, a motor housing is arranged at the upper part of the voice coil motor, and the voice coil motor is connected with the lower part of the valve body through the motor housing.

In a preferred embodiment, in the pressure relief valve provided by the present invention, a motor shaft of the voice coil motor is connected to the diaphragm, and the motor shaft drives the diaphragm to move up and down.

In a preferred embodiment, in the pressure relief valve provided by the utility model, a plurality of heat dissipation holes are formed in the bottom of the motor shell.

In a preferred embodiment, the pressure relief valve provided by the present invention, the motor housing is detachably connected to the valve body.

The second aspect of the present invention provides a respiratory support equipment gas path, which includes a flow sensor, a pressure sensor and the above-mentioned pressure relief valves, where the pressure relief valves are disposed on branches of the respiratory support equipment gas path, and the number of the pressure relief valves is at least two.

A third aspect of the utility model provides a respiratory support apparatus comprising a respiratory support apparatus circuit as described above.

The working principle of the utility model is as follows:

the turbo fan provides an air source for stabilizing air pressure and flow, a pressure release valve of a branch in the breathing air circuit controls the size of a pressure release port, and a flow sensor and a pressure sensor feed back real-time air pressure and flow. When a patient inhales, the air pressure needs to be increased, the pressure relief valve controls the pressure relief opening to be reduced, and the size of the pressure relief opening is kept unchanged until the air pressure rises to a set value; when a patient exhales, the air pressure needs to be reduced, the pressure relief valve controls the pressure relief opening to increase, and the size of the pressure relief opening is kept unchanged until the air pressure is reduced to a set value.

The utility model has the following beneficial effects:

(1) the utility model provides a pressure relief valve, wherein an air inlet and a pressure relief opening are simultaneously arranged on a valve body, and the control of the gas flow is realized by controlling the distance between a diaphragm and the pressure relief opening.

(2) The pressure relief valve disclosed by the utility model controls the diaphragm to move linearly through the voice coil motor, further controls the opening size of the pressure relief opening, and realizes the regulation of the pressure of the gas circuit.

(3) Compared with the traditional voice coil motor with the permanent magnet on the inner side of the coil, the voice coil motor disclosed by the utility model has the advantages that the possibility that the motor shaft is magnetized by the permanent magnet is reduced, and the stability of the linear motion of the motor shaft is improved.

(4) The gas circuit of the respiratory support equipment provided by the utility model adopts two or more pressure relief valves for combined use, thereby enlarging the pressure control range and improving the pressure control precision.

Drawings

FIG. 1 is an exploded view of a pressure relief valve in example 1;

FIG. 2 is a schematic cross-sectional view of a pressure relief valve in example 1;

the above reference numerals:

1. a valve body; 2. a diaphragm; 3. a voice coil motor;

11. an air inlet; 12. a pressure relief port; 13. a second fixing hole;

31. a housing; 32. a motor shaft; 33. a flexible spring sheet; 34. a linear bearing; 35. a coil support; 36. a permanent magnet; 37. fixing a bracket; 38. a motor housing;

382. a first fixing hole; 383. heat dissipation holes;

A. a gas source; B. a pressure release valve C and a flow sensor; D. a pressure sensor; E. the patient breathes the mouth.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The respiratory control valve is an important part in the breathing machine, the existing respiratory control valve is generally set to be a three-way pressure balance valve, the three-way valve is adopted for control, the air inlet and the air outlet of the valve are required to be connected into the air circuit, the air resistance can be increased, only one valve is arranged for air leakage, the pressure relief range is small, and the controllable pressure range is small. The utility model provides a two-way pressure release valve for solving the problems, and the gas resistance is reduced.

Example 1

Example 2

Example 3

This embodiment provides a respiratory support apparatus, wherein the respiratory support apparatus comprises a respiratory support apparatus circuit as described above.

The working principle of the utility model is as follows:

when a patient inhales, the pressure of the air path needs to be increased: at this moment, the voice coil motor makes output power larger by increasing current, and the motor shaft pushes the diaphragm to move upwards, so that the space between the air inlet and the pressure relief opening is reduced, the pressure relief capacity is reduced, the air pressure of the air passage rises, and the diaphragm stops moving upwards until the air pressure of the air passage rises to a set value, and the size of the pressure relief opening is kept unchanged.

When the patient exhales, the pressure of the air path needs to be reduced: at the moment, the output force of the voice coil motor is reduced by reducing the current, the pressure provided by the pressure release valve to the diaphragm is larger than the force of the motor shaft pushing the diaphragm, the diaphragm moves downwards, the space between the air inlet and the pressure release opening is increased, the pressure release capacity is increased, the air pressure of the air path is reduced, the diaphragm stops moving downwards until the air pressure of the air path is reduced to a set value, and the size of the pressure release opening is kept unchanged.

The pressure relief valve is used for being connected to a branch of an air path of respiratory support equipment, is connected with a main path of the air path through one air inlet, can reduce the air resistance of the air path of the respiratory support equipment, realizes pressure control by controlling the pressure relief size of the pressure relief valve on the branch, adopts two or more pressure relief valves to be used in combination in the air path according to use requirements, enlarges the pressure control range and improves the pressure control precision.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and is not intended to limit the practice of the utility model to these embodiments. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.