CN110186155A - A kind of dirty stifled detection of outdoor machine of air-conditioner and self-cleaning method and air conditioner - Google Patents
- ️Fri Aug 30 2019
技术领域technical field
本发明及空调技术领域，具体而言，涉及一种空调外机脏堵检测及自清洁的方法及空调器。The present invention relates to the technical field of air conditioners, and in particular, relates to a method for detecting and self-cleaning dirty blockage of an air conditioner external unit and an air conditioner.
背景技术Background technique
空调器室外机安装使用环境比较恶劣，容易因灰尘，树叶等意外进入冷凝器翅片中，或塑料袋等异物被吸附到冷凝器上，造成室外机脏堵。室外机脏堵会影响室外机散热，造成空调制冷效果下降，能效降低，造成能源的浪费。且若室外机脏堵严重，在室外环境温度较高时，还会导致排气过高，影响机组可靠性及使用寿命。而家用空调室外机一般安装在设备平台或挂在外墙上，用户往往不会注意到外机脏堵情况。The installation and use environment of the outdoor unit of the air conditioner is relatively harsh, and it is easy for dust, leaves, etc. to accidentally enter the fins of the condenser, or foreign objects such as plastic bags are adsorbed to the condenser, causing the outdoor unit to become dirty and blocked. Dirty and blocked outdoor units will affect the heat dissipation of the outdoor unit, resulting in a decrease in the cooling effect of the air conditioner, a reduction in energy efficiency, and a waste of energy. And if the outdoor unit is seriously dirty and blocked, the exhaust gas will be too high when the outdoor ambient temperature is high, which will affect the reliability and service life of the unit. The outdoor units of household air conditioners are generally installed on the equipment platform or hung on the outer wall, and users often do not notice the dirt and blockage of the outdoor unit.
发明内容Contents of the invention
本发明解决的问题是提供一种空调外机脏堵检测及自清洁的方法，增加机组可靠性和使用寿命。The problem to be solved by the present invention is to provide a method for detecting and self-cleaning the dirty blockage of an air conditioner external unit, so as to increase the reliability and service life of the unit.
为解决上述问题，本发明提供一种空调外机脏堵检测及自清洁的方法，包括：In order to solve the above problems, the present invention provides a method for detecting and self-cleaning the dirty blockage of an air conditioner external unit, including:
通过获取空调制冷运行时的外盘温度Tc、外环温度T0、和排气温度Tp及外风机转速S，判断外机冷凝器脏堵情况；By obtaining the temperature Tc of the outer disk, the temperature T0 of the outer ring, the exhaust temperature Tp and the speed S of the external fan during the cooling operation of the air conditioner, it can be judged whether the condenser of the external unit is dirty or blocked;
若判断外机冷凝器存在脏堵，则通过变换制冷制热模式及调节外风机转向，使冷凝器进行自清洁。If it is judged that the condenser of the external unit is dirty and blocked, the condenser can be self-cleaned by changing the cooling and heating mode and adjusting the direction of the external fan.
由此，可以通过空调机组自有温度传感器检测室外机脏堵，并进行自清洁，智能高效，能够节约能源和提升用户体验，增加空调机组可靠性和使用寿命。As a result, the air conditioner unit’s own temperature sensor can be used to detect the dirty blockage of the outdoor unit and perform self-cleaning, which is smart and efficient, can save energy and improve user experience, and increase the reliability and service life of the air conditioner unit.
在一些实施例中，所述通过获取空调制冷运行时的外盘温度Tc、外环温度T0、和排气温度Tp及外风机转速S，判断外机冷凝器脏堵情况包括：In some embodiments, the determination of the dirty blockage of the condenser of the external unit by obtaining the temperature Tc of the outer disk, the temperature T0 of the outer ring, the exhaust temperature Tp and the speed S of the outdoor fan during the cooling operation of the air conditioner includes:
计算排气温度Tp与外盘温度Tc之间的第一温度差值ΔT1及外盘温度Tc与外环温度T0之间的第二温度差值ΔT2；Calculate the first temperature difference ΔT1 between the exhaust gas temperature Tp and the outer disk temperature Tc and the second temperature difference ΔT2 between the outer disk temperature Tc and the outer ring temperature T0;
若满足ΔT1≤a且ΔT2≥b，则判定外机冷凝器存在脏堵，其中所述a、b根据外风机转速S、外风机额定高风转速S0、室内外侧环境温度及试验测试数据设定。If ΔT1≤a and ΔT2≥b are satisfied, it is determined that the condenser of the outdoor unit is dirty and blocked, wherein a and b are set according to the speed S of the outdoor fan, the rated high wind speed S0 of the outdoor fan, the ambient temperature of the indoor and outdoor environment, and test data .
由于第一温度差值ΔT1＝Tp-Tc及第二温度差值ΔT2＝Tc-T0可以反映出冷凝器的换热效果，因此通过对第一温度差值与阈值a及第二温度差值与阈值b的比较结果判断冷凝器的换热效果，进而可以对室外机脏堵进行判断。Since the first temperature difference ΔT1=Tp-Tc and the second temperature difference ΔT2=Tc-T0 can reflect the heat exchange effect of the condenser, so by comparing the first temperature difference and threshold a and the second temperature difference and The comparison result of the threshold b can judge the heat exchange effect of the condenser, and then can judge the dirty blockage of the outdoor unit.
在一些实施例中，所述通过获取空调制冷运行时的外盘温度Tc、外环温度T0、和排气温度Tp及外风机转速S，判断外机冷凝器脏堵情况包括：In some embodiments, the determination of the dirty blockage of the condenser of the external unit by obtaining the temperature Tc of the outer disk, the temperature T0 of the outer ring, the exhaust temperature Tp and the speed S of the outdoor fan during the cooling operation of the air conditioner includes:
S1，在制冷模式下，启动空调机组后，开始实时检测外盘温度Tc、外环温度T0、压缩机排气温度Tp及外风机转速S；S1, in the cooling mode, after starting the air conditioning unit, it starts to detect the outer disk temperature Tc, the outer ring temperature T0, the compressor exhaust temperature Tp and the outer fan speed S in real time;
S2，每隔时间段t0计算一次第一温度差值ΔT1＝Tp-Tc及第二温度差值ΔT2＝Tc-T0：S2, calculate the first temperature difference ΔT1=Tp-Tc and the second temperature difference ΔT2=Tc-T0 every time period t0:
S3，若连续n次满足ΔT1≤a且ΔT2≥b，则判定外机脏堵；否则转回至步骤S2；其中，n≥2，所述a、b根据外风机转速S、外风机额定高风转速S0、室内外侧环境温度及试验测试数据设定。S3. If ΔT1≤a and ΔT2≥b are met for n consecutive times, it is determined that the external unit is dirty; Wind speed S0, indoor and outdoor ambient temperature and test data setting.
在制冷模式下，通过空调机组自有传感器实时检测温度，并根据多次间隔时间的连续判断结果判定是否脏堵，可以有效防止误判及后续的误操作，提高判断的可靠性。In the cooling mode, the temperature is detected in real time by the own sensor of the air conditioner unit, and whether it is dirty or blocked is judged according to the continuous judgment results of multiple intervals, which can effectively prevent misjudgment and subsequent misoperation, and improve the reliability of judgment.
在一些实施例中，所述a、b按照以下公式计算：In some embodiments, the a and b are calculated according to the following formula:
a＝Ta*S/S0*e；a=Ta*S/S0*e;
b＝Tb*S0/S*e；b=Tb*S0/S*e;
其中，e为修订系数，受室内外侧环境温度影响，S为实际的外风机转速，S0为外风机额定高风转速，Ta为第一设定温差；Tb为第二设定温差，所述第一设定温差、第二设定温差均由预定条件下试验测试的温度数据设定。Among them, e is the revision coefficient, affected by the indoor and outdoor ambient temperature, S is the actual outdoor fan speed, S0 is the rated high wind speed of the outdoor fan, Ta is the first set temperature difference; Tb is the second set temperature difference, the first Both the first set temperature difference and the second set temperature difference are set by temperature data tested under predetermined conditions.
在制冷模式下，受室内外侧环境温度影响，S/S0为外机实际运行转速与额定高风转速的比值(转速与风量成正比)，与冷凝器换热效果成正比。当S/S0越大时，冷凝器换热效果越好，此时的ΔT1＝Tp-Tc较大，ΔT2＝Tc-T0较小；当S/S0越小时，冷凝器换热效果越差，此时的ΔT1＝Tp-Tc较小、ΔT2＝Tc-T0较大。由此，具体的Ta、Tb依据实际试验的测试数据设定，并结合传热学原理共同得出。In the cooling mode, affected by the indoor and outdoor ambient temperature, S/S0 is the ratio of the actual operating speed of the outdoor unit to the rated high wind speed (the speed is proportional to the air volume), and is proportional to the heat transfer effect of the condenser. When the S/S0 is larger, the heat transfer effect of the condenser is better, at this time, ΔT1=Tp-Tc is larger, and ΔT2=Tc-T0 is smaller; when the S/S0 is smaller, the heat transfer effect of the condenser is worse, At this time, ΔT1=Tp-Tc is small, and ΔT2=Tc-T0 is large. Therefore, the specific Ta and Tb are set according to the test data of the actual experiment and combined with the principle of heat transfer.
在一些实施例中，所述试验包括额定制冷试验、最大运行制冷试验、冷凝器进风异常试验。In some embodiments, the tests include a rated refrigeration test, a maximum operating refrigeration test, and a condenser air intake abnormality test.
在一些实施例中，17≤Ta≤24、10≤Tb≤15。0.8≤e≤1.2，其中，在额定制冷工况(内环温度27，外环温度35)下e取1，当内侧工况越高时，即内环温度越高，e取值越大，当外侧工况越高，即外环温度越高，e取值越小。In some embodiments, 17≤Ta≤24, 10≤Tb≤15. 0.8≤e≤1.2, where e is 1 under the rated cooling condition (inner ring temperature 27, outer ring temperature 35), when the inner working The higher the condition, that is, the higher the temperature of the inner ring, the larger the value of e is, and the higher the outer working condition, that is, the higher the temperature of the outer ring, the smaller the value of e.
在一些实施例中，若判断外机冷凝器存在脏堵，则通过变换制冷制热模式及调节外风机转向，使冷凝器进行自清洁包括：In some embodiments, if it is judged that there is a dirty blockage in the condenser of the external unit, the self-cleaning of the condenser includes:
空调机组进入制热模式，外风机停止运行，当外盘温度Tc小于第一预设温度Tc1且持续第一预定时间t1后，空调机组转换为制冷模式，当外盘温度Tc大于第二预设温度Tc2时，外风机反转第二预定时间t2，自清洁完成，空调机组恢复正常运行。The air conditioner unit enters the heating mode, and the external fan stops running. When the temperature Tc of the outer panel is lower than the first preset temperature Tc1 for the first predetermined time t1, the air conditioner unit switches to the cooling mode. When the temperature Tc of the outer panel is greater than the second preset temperature Tc2 , the external fan reverses for the second preset time t2, the self-cleaning is completed, and the air conditioning unit resumes normal operation.
该自清洁过程模拟空调外机结霜与除霜过程，即空调机组进入制热模式后，外盘温度开始降低，当外盘温度低至预定温度并保持后，所述外机结霜，此时再将空调转至制冷模式，外盘温度升高，外机的结霜融化，带走外机换热器的异物，并通过外风机反转，实现有效自清洁。This self-cleaning process simulates the frosting and defrosting process of the external unit of the air conditioner, that is, after the air conditioner unit enters the heating mode, the temperature of the external panel starts to drop, and when the temperature of the external panel drops to the predetermined temperature and remains there, the external unit frosts, and then Turn the air conditioner to the cooling mode, the temperature of the outer panel rises, the frost on the outer unit melts, and the foreign matter in the heat exchanger of the outer unit is taken away, and the external fan is reversed to achieve effective self-cleaning.
在一些实施例中，-10≤Tc1≤-5℃，2≤Tc2≤6℃。为模拟空调外机结霜与除霜过程，实时第一预设温度Tc1为小于0℃的温度，第二预设温度Tc2为大于0℃的温度。In some embodiments, -10≤Tc1≤-5°C, 2≤Tc2≤6°C. In order to simulate the process of frosting and defrosting of the external unit of the air conditioner, the real-time first preset temperature Tc 1 is a temperature lower than 0°C, and the second preset temperature Tc 2 is a temperature higher than 0°C.
在一些实施例中，1≤t1≤5min，1≤t2≤10min。外盘温度Tc小于第一预设温度Tc1且持续第一预定时间t1后，表示空调外盘温度足够低至结霜，该t1值根据经验值进行设定，第二预定时间t2的设定确保外风机反转时长可以完成自清洁。In some embodiments, 1≤t1≤5min, 1≤t2≤10min. After the temperature Tc of the outer panel is lower than the first preset temperature Tc1 and lasts for the first predetermined time t1, it means that the temperature of the outer panel of the air conditioner is low enough to form frost. The value of t1 is set according to empirical values. The setting of the second predetermined time t2 ensures Self-cleaning can be completed when the fan is reversed.
在一些实施例中，若判断所述判断外机冷凝器存在脏堵，则空调自动进入外机自清洁模式，或通过用户操作选择是否进入外机自清洁模式。In some embodiments, if it is determined that the condenser of the external unit is dirty, the air conditioner automatically enters the self-cleaning mode of the external unit, or the user selects whether to enter the self-cleaning mode of the external unit.
根据本发明的另一个方面，提供了一种空调器，包括：According to another aspect of the present invention, an air conditioner is provided, comprising:
可读存储介质，用于存储可执行指令；A readable storage medium for storing executable instructions;
一个或多个处理器，根据所述可执行指令执行如前所述的空调外机脏堵检测及自清洁的方法。One or more processors, according to the executable instructions, execute the methods for detecting dirty blockage and self-cleaning of the air conditioner external unit as described above.
在一些实施例中，所述空调器还包括：外盘温度传感器、室外温度传感器、排气温度传感器及外风机转速传感器，所述处理器电气连接至所述外盘温度传感器、室外温度传感器、排气温度传感器及外风机转速传感器。通过空调机组自有温度传感器检测室外机脏堵，并进行自清洁，能够在不增加硬件成本的前提下提升用户体验，方便高效。In some embodiments, the air conditioner further includes: an outer disk temperature sensor, an outdoor temperature sensor, an exhaust temperature sensor, and an outdoor fan speed sensor, and the processor is electrically connected to the outer disk temperature sensor, the outdoor temperature sensor, the exhaust air Temperature sensor and external fan speed sensor. The air conditioner unit's own temperature sensor detects the dirty blockage of the outdoor unit and performs self-cleaning, which can improve user experience without increasing hardware costs, which is convenient and efficient.
附图说明Description of drawings
图1为本发明空调外机脏堵检测及自清洁的方法流程图。Fig. 1 is a flow chart of the method for detecting dirty blockage and self-cleaning of an air conditioner outdoor unit according to the present invention.
具体实施方式Detailed ways
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
本发明空调外机脏堵检测及自清洁的方法，通过室外换热器外盘管传感器检测的外盘温度Tc、室外温度传感器检测的外环温度T0和压缩机排气孔检测的排气温度Tp，结合外风机风档转速S，判断冷凝器脏堵情况，并通过调外风机风速和转向，使冷凝器结霜以达到自清洁的目的。本发明通过机组自有温度传感器检测室外机脏堵，并进行自清洁，智能高效，能够节约能源和提升用户体验，增加机组可靠性和使用寿命。The method for detecting dirty blockage and self-cleaning of the air-conditioning external unit of the present invention uses the outer disk temperature Tc detected by the outer coil sensor of the outdoor heat exchanger, the outer ring temperature T0 detected by the outdoor temperature sensor, and the exhaust gas temperature Tp detected by the compressor exhaust hole. , combined with the speed S of the windshield of the external fan, judge the dirty and clogged condition of the condenser, and adjust the wind speed and direction of the external fan to make the condenser frost to achieve the purpose of self-cleaning. The invention detects the dirty blockage of the outdoor unit through the unit's own temperature sensor, and performs self-cleaning, which is intelligent and efficient, can save energy, improve user experience, and increase the reliability and service life of the unit.
具体地，本发明空调外机脏堵检测及自清洁的方法包括通过获取空调制冷运行时的外盘温度Tc、外环温度T0、和排气温度Tp及外风机转速S，判断外机冷凝器脏堵情况；若判断外机冷凝器存在脏堵，则通过变换制冷制热模式及调节外风机转向，使冷凝器进行自清洁。Specifically, the method for detecting dirty blockage and self-cleaning of the air conditioner external unit of the present invention includes determining whether the condenser of the external unit is dirty by obtaining the outer disk temperature Tc, the outer ring temperature T0, the exhaust temperature Tp, and the speed S of the external fan during the cooling operation of the air conditioner. If it is judged that the condenser of the external unit is dirty and blocked, the condenser can be self-cleaned by changing the cooling and heating mode and adjusting the direction of the external fan.
在本发明第一个示意性实施例中，提供了一种空调外机脏堵检测及自清洁的方法。图1为本发明空调外机脏堵检测及自清洁的方法流程图。如图1所示，S1，在制冷模式下，启动空调机组后，开始实时检测外盘温度Tc、外环温度T0、压缩机排气温度Tp及外风机转速S；In a first exemplary embodiment of the present invention, a method for detecting dirty blockage and self-cleaning of an air conditioner external unit is provided. Fig. 1 is a flow chart of the method for detecting dirty blockage and self-cleaning of an air conditioner outdoor unit according to the present invention. As shown in Figure 1, S1, in the cooling mode, after starting the air conditioning unit, start to detect the outer disk temperature Tc, the outer ring temperature T0, the compressor exhaust temperature Tp and the outer fan speed S in real time;
S2，每隔时间段t0计算一次第一温度差值ΔT1＝Tp-Tc及第二温度差值ΔT2＝Tc-T0；S2, calculating the first temperature difference ΔT1=Tp-Tc and the second temperature difference ΔT2=Tc-T0 every time period t0;
S3，若连续n次ΔT1≤a且ΔT2≥b，则报外机脏堵代码，室外机脏堵故障灯持续闪烁，提示用户外机脏堵，转入步骤S4；否则转回至步骤S2；其中，若需要外机脏堵检测较为灵敏，则设置n＝1；一般地，为了避免出现误判的情况，n取值为n≥2。S3, if ΔT1≤a and ΔT2≥b for n consecutive times, report the outdoor unit dirty blockage code, the outdoor unit dirty blockage fault light keeps flashing, prompting the user that the outdoor unit is dirty blockage, and go to step S4; otherwise, go back to step S2; Wherein, if it is necessary to detect the dirty blockage of the external machine more sensitively, then set n=1; generally, in order to avoid misjudgment, the value of n is n≥2.
由于第一温度差值ΔT1＝Tp-Tc及第二温度差值ΔT2＝Tc-T0可以反映出冷凝器的换热效果，因此通过对第一温度差值与阈值a及第二温度差值与阈值b的比较结果判断冷凝器的换热效果，进而进行室外机脏堵的判断。而对于阈值a、b的选取，一般为根据额定制冷试验，最大运行制冷试验、冷凝器进风异常等试验获取的阈值，具体地，阈值a、b按照以下公式计算：Since the first temperature difference ΔT1=Tp-Tc and the second temperature difference ΔT2=Tc-T0 can reflect the heat exchange effect of the condenser, so by comparing the first temperature difference and threshold a and the second temperature difference and The comparison result of the threshold b judges the heat exchange effect of the condenser, and then judges the dirty blockage of the outdoor unit. As for the selection of thresholds a and b, they are generally thresholds obtained from tests such as rated refrigeration tests, maximum operating refrigeration tests, and abnormal air intake of condensers. Specifically, thresholds a and b are calculated according to the following formula:
a＝Ta*S/S0*e；a=Ta*S/S0*e;
b＝Tb*SO/S*e；b=Tb*SO/S*e;
其中，e为修订系数，受室内外侧环境温度影响，Ta为第一设定温差；Tb为第二设定温差，S为所述步骤S1中得到的外风机实际转速，S0为外风机额定高风转速。Among them, e is the revision coefficient, affected by the indoor and outdoor ambient temperature, Ta is the first set temperature difference; Tb is the second set temperature difference, S is the actual speed of the outdoor fan obtained in the step S1, and S0 is the rated height of the outdoor fan. wind speed.
在制冷模式下，受室内外侧环境温度影响，S/S0为外机实际运行转速与额定高风转速的比值(转速与风量成正比)，与冷凝器换热效果成正比。当S/S0越大时，冷凝器换热效果越好，此时的ΔT1＝Tp-Tc较大，ΔT2＝Tc-T0较小；当S/S0越小时，冷凝器换热效果越差，此时的ΔT1＝Tp-Tc较小、ΔT2＝Tc-T0较大。In the cooling mode, affected by the indoor and outdoor ambient temperature, S/S0 is the ratio of the actual operating speed of the outdoor unit to the rated high wind speed (the speed is proportional to the air volume), and is proportional to the heat transfer effect of the condenser. When the S/S0 is larger, the heat transfer effect of the condenser is better, at this time, ΔT1=Tp-Tc is larger, and ΔT2=Tc-T0 is smaller; when the S/S0 is smaller, the heat transfer effect of the condenser is worse, At this time, ΔT1=Tp-Tc is small, and ΔT2=Tc-T0 is large.
由此，具体的Ta、Tb依据实际试验的测试数据设定，包括额定制冷试验，最大运行制冷试验、冷凝器进风异常等试验的温度数据，结合传热学原理共同得出。优选地，设置Ta＝20、Tb＝12，0.8≤e≤1.2。其中，在额定制冷工况(内环温度27，外环温度35)下e取1，当内侧工况越高时，即内环温度越高，e取值越大，当外侧工况越高，即外环温度越高，e取值越小。Therefore, the specific Ta and Tb are set according to the test data of the actual test, including the temperature data of the rated refrigeration test, the maximum operation refrigeration test, and the abnormal air intake of the condenser, combined with the principle of heat transfer. Preferably, Ta=20, Tb=12, 0.8≤e≤1.2 are set. Among them, e takes 1 under the rated cooling condition (inner ring temperature 27, outer ring temperature 35), when the inner working condition is higher, that is, the inner ring temperature is higher, the value of e is larger, , that is, the higher the temperature of the outer ring, the smaller the value of e.
S4，自动进入室外机自清洁模式：空调机组进入制热模式，外风机停止运行，当外盘温度Tc小于第一预设温度Tc1且持续第一预定时间t1后，空调机组转换为制冷模式，当外盘温度Tc大于第二预设温度Tc2时，外风机反转第二预定时间t2，自清洁完成，空调机组恢复正常运行。其中，1≤t1≤5min，1≤t2≤10min；第一预设温度Tc1为小于0℃的温度，优选地，-10≤Tc1≤-5℃，第二预设温度Tc2为大于0℃的温度，优选地，2≤Tc2≤6℃。S4, automatically enter the self-cleaning mode of the outdoor unit: the air-conditioning unit enters the heating mode, the outdoor fan stops running, and when the temperature Tc of the outer panel is lower than the first preset temperature Tc1 for the first predetermined time t1, the air-conditioning unit switches to the cooling mode, When the temperature Tc of the external panel is greater than the second preset temperature Tc2 , the external fan is reversed for a second predetermined time t2, self-cleaning is completed, and the air conditioning unit resumes normal operation. Among them, 1≤t1≤5min, 1≤t2≤10min; the first preset temperature Tc 1 is a temperature lower than 0°C, preferably, -10≤Tc 1 ≤-5°C, and the second preset temperature Tc 2 is greater than A temperature of 0°C, preferably, 2≦Tc 2 ≦6°C.
该自清洁过程模拟空调外机结霜与除霜过程，即空调机组进入制热模式后，外盘温度开始降低，当外盘温度低至一定程度并保持一定时间后，所述外机能够结霜，此时再将空调转至制冷模式，外盘温度升高，外机的结霜融化，带走外机换热器的异物，并通过外风机反转，实现有效自清洁。在本发明其他一些实施例中，空调运行于制热模式下时，可以直接通过自动除霜对外机脏堵进行自清洁。This self-cleaning process simulates the frosting and defrosting process of the external unit of the air conditioner, that is, after the air conditioner unit enters the heating mode, the temperature of the external panel begins to drop, and when the temperature of the external panel drops to a certain level and remains for a certain period of time, the external unit can frost. At this time, turn the air conditioner to the cooling mode, the temperature of the outer plate rises, the frost on the external unit melts, and the foreign matter in the heat exchanger of the external unit is taken away, and the external fan is reversed to achieve effective self-cleaning. In some other embodiments of the present invention, when the air conditioner is running in the heating mode, it can directly perform self-cleaning of the dirty blockage of the external machine through automatic defrosting.
在本发明第二个示意性实施例中，提供了一种空调外机脏堵检测及自清洁的方法。图2为本发明空调外机脏堵检测及自清洁的方法流程图。如图2所示，本实施例空调外机脏堵检测及自清洁的方法包括：In a second exemplary embodiment of the present invention, a method for detecting and self-cleaning dirty blockage of an air conditioner external unit is provided. Fig. 2 is a flow chart of the method for detecting dirty blockage and self-cleaning of an air conditioner outdoor unit according to the present invention. As shown in Figure 2, the method for detecting dirty blockage and self-cleaning of the air conditioner external unit in this embodiment includes:
S101，在制冷模式下启动空调机组后，开始实时检测外盘温度Tc、外环温度T0、压缩机排气温度Tp及外风机转速S；S101, after starting the air conditioner unit in the cooling mode, start real-time detection of the outer disk temperature Tc, the outer ring temperature T0, the compressor discharge temperature Tp, and the outer fan speed S;
S102，在空调运行预定时间后，计算一次差值ΔT1＝Tp-Tc及ΔT2＝Tc-T0；S102, after the air conditioner runs for a predetermined time, calculate the difference ΔT1=Tp-Tc and ΔT2=Tc-T0 once;
S103，若ΔT1≤a且ΔT2≥b，则报外机脏堵代码，室外机脏堵故障灯持续闪烁，提示用户外机脏堵，转入步骤S104；否则转至步骤S102；S103, if ΔT1 ≤ a and ΔT2 ≥ b, report the outdoor unit dirty blockage code, the outdoor unit dirty blockage fault light keeps flashing, prompting the user to outdoor unit dirty blockage, and go to step S104; otherwise, go to step S102;
其中，a、b为根据试验获取的阈值，具体地，Among them, a and b are the thresholds obtained according to the experiment, specifically,
a＝Ta*S/S0*e；a=Ta*S/S0*e;
b＝Tb*S0/S*e；b=Tb*S0/S*e;
e为修订系数，受室内外侧环境温度影响，Ta为第一设定温差，S为所述步骤S101中得到的外风机实际转速，S0为外风机额定高风转速；Tb为第二设定温差。e is the revision coefficient, affected by the indoor and outdoor ambient temperature, Ta is the first set temperature difference, S is the actual speed of the outdoor fan obtained in the step S101, S0 is the rated high wind speed of the outdoor fan; Tb is the second set temperature difference .
由此，具体的Ta、Tb依据实际测试数据设定，根据额定制冷试验，最大运行制冷试验、冷凝器进风异常等试验的温度数据，结合传热学原理共同得出。本实施例中，设置Ta＝20、Tb＝12，0.8≥e≥1.2。Therefore, the specific Ta and Tb are set according to the actual test data, based on the temperature data of the rated refrigeration test, the maximum operation refrigeration test, and the abnormal air intake of the condenser, combined with the principle of heat transfer. In this embodiment, Ta=20, Tb=12, 0.8≥e≥1.2 are set.
S104，提醒用户是否选择进入外机自清洁模式，若选中则进入室外机自清洁模式：空调机组进入制热模式，外风机停止运行，当外盘温度Tc≤-8℃且连续2min后，空调机组转换为制冷模式，当外盘温度Tc≥3℃时，外风机反转3min，自清洁完成，空调机组恢复正常运行。该自清洁过程模拟空调外机结霜与除霜过程，即空调机组进入制热模式后，外盘温度开始降低，当外盘温度低至一定程度并保持一定时间后，所述外机能够结霜，此时再将空调转至制冷模式，外盘温度升高，外机的结霜融化，带走外机换热器的异物，并通过外风机反转，实现有效自清洁。S104. Remind the user whether to choose to enter the self-cleaning mode of the outdoor unit. If selected, enter the self-cleaning mode of the outdoor unit: the air-conditioning unit enters the heating mode, and the outdoor fan stops running. Switch to cooling mode, when the temperature of the outer panel Tc≥3°C, the external fan will reverse for 3 minutes, self-cleaning is completed, and the air conditioner unit resumes normal operation. This self-cleaning process simulates the frosting and defrosting process of the external unit of the air conditioner, that is, after the air conditioner unit enters the heating mode, the temperature of the external panel begins to drop, and when the temperature of the external panel drops to a certain level and remains for a certain period of time, the external unit can frost. At this time, turn the air conditioner to the cooling mode, the temperature of the outer plate rises, the frost on the external unit melts, and the foreign matter in the heat exchanger of the external unit is taken away, and the external fan is reversed to achieve effective self-cleaning.
在本发明第三个示意性实施例中，提供了一种空调器，通过所述第一个实施例中的方法对空调外机进行脏堵检测。具体地，所述空调外机脏堵检测利用了空调机组自有的各温度传感器，包括安装于室外机外盘管上的外盘温度传感器，用于实时检测外盘温度Tc；室外温度传感器，用于实时监测外环温度T0；安装于压缩机排气口的排气温度传感器，用于监测压缩机排气温度Tp；以及处理器，电气连接至上述各传感器，并通过执行如第一实施例中所述的方法实现空调外机脏堵检测；可读存储介质，用于存储可执行指令。优选地，所述空调外机脏堵检测装置还包括安装于外风机的转速传感器，用于监测外风机转速S。在其他一些实施例中，所述外风机转速S还可以根据空调机组当前风档进行计算。In a third exemplary embodiment of the present invention, an air conditioner is provided, which detects dirty blockage of an air conditioner external unit through the method in the first embodiment. Specifically, the air conditioner outdoor unit dirty blockage detection utilizes the temperature sensors of the air conditioner unit, including the outer disk temperature sensor installed on the outer coil of the outdoor unit for real-time detection of the outer disk temperature Tc; the outdoor temperature sensor for Real-time monitoring of the outer ring temperature T0; the discharge temperature sensor installed at the compressor discharge port is used to monitor the compressor discharge temperature Tp; and the processor is electrically connected to the above-mentioned sensors, and by performing The method realizes the dirty blocking detection of the air conditioner external unit; the readable storage medium is used for storing executable instructions. Preferably, the device for detecting dirty blockage of an external air conditioner further includes a rotational speed sensor installed on the external fan for monitoring the rotational speed S of the external fan. In some other embodiments, the external fan speed S may also be calculated according to the current wind gear of the air conditioning unit.
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.