WO2023124013A1 - 空调器制冷剂检测方法、检测装置及空调器 - Google Patents
空调器制冷剂检测方法、检测装置及空调器 Download PDFInfo
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- WO2023124013A1 WO2023124013A1 PCT/CN2022/105475 CN2022105475W WO2023124013A1 WO 2023124013 A1 WO2023124013 A1 WO 2023124013A1 CN 2022105475 W CN2022105475 W CN 2022105475W WO 2023124013 A1 WO2023124013 A1 WO 2023124013A1
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- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- 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
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- 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
Definitions
- the invention belongs to the technical field of air conditioning, and in particular relates to an air conditioner refrigerant detection method, a detection device and an air conditioner.
- refrigerant leakage often occurs during the operation of the air conditioner. Once the refrigerant leaks, it will directly affect the cooling and heating effects of the air conditioner, and even damage the air conditioner components in severe cases.
- parameters such as the operating current of the air conditioner unit, the discharge temperature of the compressor, the suction temperature of the compressor, the coil temperature of the internal and external units, or the superheat of the unit are usually used to determine whether refrigerant leakage occurs. It takes a long time for these parameters to change after the refrigerant leaks. Therefore, the speed of detecting refrigerant by using these parameters is slow, and the refrigerant leakage cannot be found in time. In addition, when the air conditioner is running, the above parameters will be affected by various factors and change, which will lead to low accuracy in detecting whether the refrigerant is leaking based on these parameters, and misjudgment is prone to occur.
- One of the objects of the present invention is to provide a method and a detection device for detecting refrigerant of an air conditioner, so as to improve the speed and accuracy of refrigerant detection.
- the air conditioner refrigerant detection method provided by the present invention is realized by the following technical solutions:
- a method for detecting refrigerant in an air conditioner comprising:
- the current operating frequency of the compressor When the air conditioner is running, the current operating frequency of the compressor, the current vibration frequency of the intake pipe connected to the air inlet of the compressor, and the current vibration of the exhaust pipe connected to the exhaust port of the compressor are acquired in real time frequency;
- Both the current first difference threshold and the current second difference threshold are known values.
- the method also includes:
- the actual refrigerant amount of the air conditioner is determined based on the current first difference value and the current second difference value.
- determining the actual refrigerant quantity of the air conditioner based on the current first difference and the current second difference includes:
- the current refrigerant quantity matching the current difference difference is determined as the actual refrigerant quantity.
- the current first difference threshold and the current second difference threshold are determined by the following method:
- the current first difference threshold and the current second difference threshold matching the current operating frequency are determined according to the known matching relationship between the frequency range and the difference threshold.
- the method also includes:
- the air conditioner refrigerant detection device provided by the present invention is realized by the following technical solutions:
- An air conditioner refrigerant detection device comprising:
- the current operating frequency acquisition unit is used to obtain the current operating frequency of the compressor in real time when the air conditioner is running;
- the current intake pipe vibration frequency acquisition unit is used to obtain in real time the current intake pipe vibration frequency of the intake pipe connected to the air inlet of the compressor when the air conditioner is running;
- the current exhaust pipe vibration frequency acquisition unit is used to obtain in real time the current exhaust pipe vibration frequency of the exhaust pipe connected to the exhaust port of the compressor when the air conditioner is running;
- a current first difference acquisition unit configured to acquire a current first difference between the current operating frequency and the current intake pipe vibration frequency
- a current second difference acquisition unit configured to acquire a current second difference between the current operating frequency and the current exhaust pipe vibration frequency
- a result determining unit configured to determine that refrigerant leakage occurs when the current first difference is greater than the current first difference threshold and the current second difference is greater than the current second difference threshold;
- Both the current first difference threshold and the current second difference threshold are known values.
- the device also includes:
- An actual refrigerant amount determining unit configured to determine the actual refrigerant amount of the air conditioner based on the current first difference and the current second difference after the result determining unit determines that refrigerant leakage occurs.
- the device also includes:
- the alarm unit is configured to issue an alarm prompt when the result determining unit determines that refrigerant leakage occurs.
- Another object of the present invention is to provide an air conditioner, including a compressor, and the air conditioner also includes the above-mentioned air conditioner refrigerant detection device.
- Another object of the present invention is to provide an electronic device, including a processor, a memory, and a computer program stored on the memory, the processor is configured to execute the computer program, and realize the above air conditioner refrigerant detection method .
- the air conditioner refrigerant detection method and detection device use the operating frequency of the compressor, the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe as judgment parameters, and perform refrigerant detection based on the difference between the operating frequency and the two vibration frequencies , when the difference exceeds a certain difference threshold, it is determined that refrigerant leakage has occurred; because the refrigerant will concentrate in the compressor and pass through the compressor’s intake and exhaust pipelines in one cycle, and the intake pipeline The difference in the amount of refrigerant in the air conditioner and the exhaust pipeline will produce different vibration frequencies of the pipeline. Then, after the leakage of the refrigerant in the air conditioner causes the refrigerant quantity to change, the change will quickly pass through the intake pipeline and suction of the compressor.
- the vibration frequency of the gas pipeline is reflected; and, after the air conditioner is installed in place, the main factors affecting the vibration of the intake pipeline and exhaust pipeline are the operating frequency of the compressor itself and the amount of refrigerant passing through the pipeline; therefore, according to The operating frequency of the compressor, the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe are used as the refrigerant judgment parameters, which can not only quickly track the change of the refrigerant, improve the rapidity of refrigerant detection, but also eliminate the interference of other factors and improve the efficiency of refrigeration.
- the accuracy of refrigerant detection can avoid misjudgment of refrigerant leakage and affect the performance and safety performance of the air conditioner.
- Fig. 1 is a schematic flow chart of an embodiment of an air conditioner refrigerant detection method of the present invention
- Fig. 2 is a schematic flow chart of another embodiment of the air conditioner refrigerant detection method of the present invention.
- Fig. 3 is a schematic structural view of an embodiment of an air conditioner refrigerant detection device of the present invention.
- FIG. 4 is a schematic structural view of another embodiment of the air conditioner refrigerant detection device of the present invention.
- FIG. 5 is a schematic structural diagram of an embodiment of the electronic device of the present invention.
- the air conditioners provided in the following embodiments implement a cooling and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator.
- the cooling and heating cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat an indoor space.
- the refrigeration working principle of the air conditioner is: the compressor works so that the indoor heat exchanger (in the indoor unit, the evaporator at this time) is in an ultra-low pressure state, the liquid refrigerant in the indoor heat exchanger quickly evaporates and absorbs heat, and the indoor fan blows out The air from the air is cooled by the indoor heat exchanger coil and then becomes cold air and blows into the room. After being pressurized by the compressor, the evaporated and gasified refrigerant is condensed into a liquid state in the high-pressure environment of the outdoor heat exchanger (in the outdoor unit, the condenser at this time), releasing heat, and dissipating the heat through the outdoor fan To the atmosphere, such a cycle has achieved the cooling effect.
- the heating working principle of the air conditioner is: the gaseous refrigerant is pressurized by the compressor to become a high-temperature and high-pressure gas, enters the indoor heat exchanger (in this case, the condenser), condenses and liquefies, releases heat, and becomes a liquid, and at the same time heats the indoor air, thereby To achieve the purpose of increasing the indoor temperature.
- the liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (at this time, the evaporator), evaporates and gasifies, absorbs heat, and becomes a gas. At the same time, it absorbs the heat of the outdoor air (the outdoor air becomes colder), and becomes a gaseous refrigerant. Enter the compressor again to start the next cycle.
- the present invention creatively proposes to use the operating frequency of the compressor, the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe as judgment parameters to determine the
- the refrigerant is detected to achieve the technical purpose of improving the rapidity of refrigerant detection, eliminating the interference of other factors, and improving the accuracy of refrigerant detection.
- Fig. 1 shows a schematic flow chart of an embodiment of the air conditioner refrigerant detection method of the present invention.
- this embodiment uses the following procedure to detect the refrigerant of the air conditioner.
- Step 101 When the air conditioner is running, obtain the current operating frequency of the compressor, the current vibration frequency of the intake pipe, and the current vibration frequency of the exhaust pipe in real time.
- the current operating frequency of the compressor refers to the operating frequency of the compressor acquired in real time according to the set sampling frequency when the air conditioner is running.
- the operating frequency of the compressor is controlled by the controller of the air conditioner, so the current operating frequency can be easily known by the controller.
- the vibration frequency of the current intake pipe refers to the vibration frequency of the intake pipe connected to the air inlet of the compressor obtained in real time according to the set sampling frequency when the air conditioner is running, which can be obtained through the vibration monitoring device installed on the intake pipe.
- the current exhaust pipe vibration frequency refers to the vibration frequency of the exhaust pipe connected to the exhaust port of the compressor obtained in real time according to the set sampling frequency when the air conditioner is running, which can be determined by the vibration monitoring device installed on the exhaust pipe informed.
- Step 102 Obtain the current first difference between the current operating frequency and the current intake pipe vibration frequency, and the current second difference between the current operating frequency and the current exhaust pipe vibration frequency.
- Step 103 When it is satisfied that the current first difference is greater than the current first difference threshold and the current second difference is greater than the current second difference threshold, it is determined that refrigerant leakage occurs.
- both the current first difference threshold and the current second difference threshold are known values.
- the two thresholds are determined by the R&D personnel through comprehensive means such as theoretical analysis, experimental simulation, and prototype testing before the air conditioner leaves the factory, and are determined when the refrigerant quantity of the air conditioner is normal and the compressor is operating at a certain level. Frequency, reflecting the critical value of the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe.
- the current first difference is greater than the current first difference threshold, and the current second difference is greater than the current second difference threshold, it indicates that both the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe have exceeded the critical value when the amount of refrigerant is normal. Frequency value, and the vibration frequency of the intake pipe and exhaust pipe increases due to the reduction of the suction volume and exhaust volume due to the reduction of the refrigerant amount. In this case, it is determined that refrigerant leakage has occurred.
- the operating frequency of the compressor, the vibration frequency of the intake pipe, and the vibration frequency of the exhaust pipe are used as judgment parameters, and the refrigerant detection is performed based on the difference between the operating frequency and the two vibration frequencies.
- the value threshold is reached, it is determined that refrigerant leakage has occurred.
- the refrigerant will concentrate in the compressor and pass through the compressor's intake and exhaust pipelines in one cycle, and the difference in the amount of refrigerant in the intake and exhaust pipelines will produce different pipeline vibrations frequency, then, after the air conditioner refrigerant leaks and causes the amount of refrigerant to change, the change will be quickly reflected by the vibration frequency of the compressor's intake pipeline and suction pipeline; and, after the air conditioner is installed in place,
- the main factors affecting the vibration of the intake pipeline and exhaust pipeline are the operating frequency of the compressor itself and the amount of refrigerant passing through the pipeline; therefore, according to the operating frequency of the compressor, the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe as refrigeration
- the refrigerant judgment parameter can not only quickly track the change of refrigerant, improve the rapidity of refrigerant detection, but also eliminate the interference of other factors, improve the accuracy of refrigerant detection, and avoid misjudgment of refrigerant leakage and affect the air conditioner.
- the judgment is made based on the vibration frequency of the suction pipe and the vibration frequency of the exhaust pipe at the same time, avoiding the judgment error that is easy to occur when using a single frequency judgment, and further ensuring the accuracy of the judgment.
- Fig. 2 shows a schematic flow chart of another embodiment of the air conditioner refrigerant detection method of the present invention.
- this embodiment adopts the following procedure to detect the refrigerant of the air conditioner.
- Step 201 When the air conditioner is running, obtain the current operating frequency of the compressor, the current intake pipe vibration frequency, the current exhaust pipe vibration frequency, the current first difference threshold and the current second difference threshold in real time.
- the current operating frequency of the compressor refers to the operating frequency of the compressor acquired in real time according to the set sampling frequency when the air conditioner is running.
- the operating frequency of the compressor is controlled by the controller of the air conditioner, so the current operating frequency can be easily known by the controller.
- the vibration frequency of the current intake pipe refers to the vibration frequency of the intake pipe connected to the air inlet of the compressor obtained in real time according to the set sampling frequency when the air conditioner is running, which can be obtained through the vibration monitoring device installed on the intake pipe.
- the current exhaust pipe vibration frequency refers to the vibration frequency of the exhaust pipe connected to the exhaust port of the compressor obtained in real time according to the set sampling frequency when the air conditioner is running, which can be determined by the vibration monitoring device installed on the exhaust pipe informed.
- the current first difference threshold and the current second difference threshold are known values, and are determined by the following method:
- the current first difference threshold and the current second difference threshold matching the current operating frequency are determined.
- the matching relationship between the frequency range and the difference threshold is acquired and preset in the air conditioner before the air conditioner leaves the factory.
- the matched first difference threshold and the second difference threshold can be dynamically selected based on the real-time operating frequency of the compressor, which can further improve the accuracy of refrigerant detection compared with using a fixed difference threshold.
- Step 202 Obtain the current first difference between the current operating frequency and the current intake pipe vibration frequency, and the current second difference between the current operating frequency and the current exhaust pipe vibration frequency.
- Step 203 When it is satisfied that the current first difference is greater than the current first difference threshold and the current second difference is greater than the current second difference threshold, it is determined that refrigerant leakage occurs.
- the current first difference is greater than the current first difference threshold, and the current second difference is greater than the current second difference threshold, it indicates that both the vibration frequency of the intake pipe and the vibration frequency of the exhaust pipe have exceeded the critical value when the amount of refrigerant is normal. Frequency value, and the vibration frequency of the intake pipe and exhaust pipe increases due to the reduction of the suction volume and exhaust volume due to the reduction of the refrigerant amount. In this case, it is determined that refrigerant leakage has occurred.
- Step 204 issue an alarm prompt and determine the actual refrigerant quantity of the air conditioner
- step 203 After it is determined in step 203 that refrigerant leakage occurs, an alarm prompt is issued to prompt the user to perform detection and maintenance, and at the same time, the compressor of the air conditioner is stopped to reduce the aggravation of refrigerant leakage and greater harm caused by the continued operation of the compressor.
- the actual refrigerant quantity of the air conditioner is further determined so as to judge the leakage level, and different processing is performed according to the leakage level. Specifically, the actual refrigerant amount of the air conditioner is determined according to the current first difference and the current second difference, and the more specific determination method is the process of step 205 .
- Step 205 Calculate the current first difference between the current first difference and the current first difference threshold and the current second difference between the current second difference and the current second difference threshold, Determine the difference range of the current difference to determine the actual refrigerant amount.
- the matching relationship between the difference range of the difference and the amount of refrigerant is preset in the air conditioner, and the matching relationship is determined by the research and development personnel through comprehensive means such as theoretical analysis, experimental simulation, and prototype testing.
- the current first difference difference and the current second difference difference are obtained, respectively determine the current difference difference range to which the current first difference difference and the current second difference difference belong. Then, according to the matching relationship between the difference range of the difference and the refrigerant amount, the current refrigerant amount matching the current difference range is determined, and the current refrigerant amount is the current actual refrigerant amount of the air conditioner.
- the change of the refrigerant can be quickly tracked, the rapidity of refrigerant detection can be improved, the interference of other factors can be eliminated, the accuracy of refrigerant detection can be improved, and misjudgment of refrigerant leakage can be avoided. And affect the performance and safety performance of the air conditioner.
- the judgment is made based on the vibration frequency of the suction pipe and the vibration frequency of the exhaust pipe at the same time, avoiding the judgment error that is easy to occur when using a single frequency judgment, and further ensuring the accuracy of the judgment.
- the actual amount of refrigerant in the air conditioner after refrigerant leakage can be determined, which is convenient for understanding the situation of the refrigerant and for judging the level of leakage. Leak classes are handled differently.
- Fig. 3 is a schematic structural diagram of an embodiment of an air conditioner refrigerant detection device according to the present invention.
- the detection device includes:
- the current operating frequency acquisition unit 31 is configured to acquire the current operating frequency of the compressor in real time when the air conditioner is running.
- the current intake pipe vibration frequency acquisition unit 32 is configured to acquire in real time the current intake pipe vibration frequency of the intake pipe connected to the air intake of the compressor when the air conditioner is running.
- the current exhaust pipe vibration frequency acquisition unit 33 is configured to acquire in real time the current exhaust pipe vibration frequency of the exhaust pipe connected to the exhaust port of the compressor when the air conditioner is running.
- the current first difference acquisition unit 34 is configured to acquire the current first difference between the current operating frequency acquired by the current operating frequency acquisition unit 31 and the current intake pipe vibration frequency acquired by the current intake pipe vibration frequency acquisition unit 32 .
- the current second difference obtaining unit 35 is configured to obtain the current second difference between the current operating frequency obtained by the current operating frequency obtaining unit 31 and the current exhaust pipe vibration frequency obtained by the current exhaust pipe vibration frequency obtaining unit 33 .
- the result determination unit 36 is configured to judge the refrigerant according to the current first difference obtained by the current first difference obtaining unit 34 and the current second difference obtained by the current second difference obtaining unit 35, specifically, in When the current first difference is greater than the current first difference threshold and the current second difference is greater than the current second difference threshold, it is determined that refrigerant leakage occurs. Both the current first difference threshold and the current second difference threshold are known values.
- the control device with the above structure runs corresponding software programs and performs corresponding functions, and performs air conditioner refrigerant detection according to the process of the embodiment of the air conditioner refrigerant detection method in Figure 1 and its preferred embodiment, reaching the same level as the embodiment in Figure 1 and its Corresponding technical effects of preferred embodiments.
- Fig. 4 is a schematic structural diagram of an embodiment of the air conditioner refrigerant detection device of the present invention.
- the detection device includes:
- the current operating frequency acquisition unit 41 is configured to acquire the current operating frequency of the compressor in real time when the air conditioner is running.
- the current intake pipe vibration frequency acquisition unit 42 is configured to acquire in real time the current intake pipe vibration frequency of the intake pipe connected to the air intake of the compressor when the air conditioner is running.
- the current exhaust pipe vibration frequency acquisition unit 43 is configured to acquire in real time the current exhaust pipe vibration frequency of the exhaust pipe connected to the exhaust port of the compressor when the air conditioner is running.
- the current first difference obtaining unit 44 is configured to obtain the current first difference between the current operating frequency obtained by the current operating frequency obtaining unit 41 and the current intake pipe vibration frequency obtained by the current intake pipe vibration frequency obtaining unit 42 .
- the current second difference obtaining unit 45 is configured to obtain the current second difference between the current operating frequency obtained by the current operating frequency obtaining unit 41 and the current exhaust pipe vibration frequency obtained by the current exhaust pipe vibration frequency obtaining unit 43 .
- the result determining unit 46 is configured to judge the refrigerant according to the current first difference obtained by the current first difference obtaining unit 44 and the current second difference obtained by the current second difference obtaining unit 45, specifically, in When the current first difference is greater than the current first difference threshold and the current second difference is greater than the current second difference threshold, it is determined that refrigerant leakage occurs.
- the alarm unit 47 is configured to issue an alarm prompt when the result determining unit 46 determines that refrigerant leakage occurs.
- the actual refrigerant amount determining unit 48 is configured to determine the actual refrigerant amount of the air conditioner based on the current first difference and the current second difference after the result determining unit 46 determines that refrigerant leakage occurs.
- the control device with the above structure runs corresponding software programs and performs corresponding functions, and performs air conditioner refrigerant detection according to the process of the embodiment of the air conditioner refrigerant detection method in Figure 2 and its preferred embodiment, reaching the same level as the embodiment in Figure 2 and its preferred embodiment. Corresponding technical effects of preferred embodiments.
- the air conditioner refrigerant detection devices of the above embodiments are applied to air conditioners, which can improve the speed and accuracy of air conditioner refrigerant detection.
- Fig. 5 shows a structural block diagram of an embodiment of the electronic device of the present invention.
- the electronic equipment includes a processor 51, a memory 52 and a computer program 521 stored on the memory 52, and the processor 51 is configured to execute the computer program 521 to realize the air conditioner in the embodiment of FIG. 1, the embodiment of FIG. 2 and other preferred embodiments. Refrigerant detection method, and achieve the technical effects of the corresponding embodiments.
- the electronic equipment can be a main control board, a controller, etc. of an air conditioner.
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Abstract
一种空调器制冷剂检测方法、检测装置及空调器，所述方法包括：空调器运行时，实时获取压缩机的当前运转频率、与压缩机的进气口连接的进气管的当前进气管振动频率以及与压缩机的排气口连接的排气管的当前排气管振动频率；获取所述当前运转频率与所述当前进气管振动频率之间的当前第一差值，以及获取所述当前运转频率与所述当前排气管振动频率之间的当前第二差值；在满足所述当前第一差值大于当前第一差值阈值且所述当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏。该方法能提高空调器制冷剂检测的速度和检测准确性。
Description
本发明属于空气调节技术领域，具体地说，涉及空调器制冷剂检测方法、检测装置及空调器。
空调器由于安装不规范或者在长时间使用后，经常会在空调器运行过程中出现制冷剂泄漏的问题。制冷剂一旦泄漏，直接影响空调器的制冷、制热效果，严重时甚至损坏空调器部件。
现有技术中，通常采用空调器机组工作电流、压缩机排气温度、压缩机吸气温度、内外机盘管温度或机组过热度等参量判断是否发生制冷剂泄漏。制冷剂发生泄漏后至引起这些参量的变化，需要经过较长的时间，因此，采用这些参量检测制冷剂时速度慢，不能及时发现制冷剂泄漏。此外，空调器运行时，上述各参量会受到各种因素的影响而发生变化，会导致基于这些参量检测制冷剂是否泄漏的精确性低，易出现误判。
鉴于此，亟需一种提高制冷剂检测的速度和准确性的技术方案。
本发明的目的之一在于提供一种空调器制冷剂检测方法及检测装置，提高制冷剂检测的速度和准确性。
为实现上述发明目的，本发明提供的空调器制冷剂检测方法采用下述技术方案予以实现：
一种空调器制冷剂检测方法，所述方法包括：
空调器运行时，实时获取压缩机的当前运转频率、与压缩机的进气口连接的进气管的当前进气管振动频率以及与压缩机的排气口连接的排气管的当前排气管振动频率；
获取所述当前运转频率与所述当前进气管振动频率之间的当前第一差值，以及获取所述当前运转频率与所述当前排气管振动频率之间的当前第二差值；
在满足所述当前第一差值大于当前第一差值阈值且所述当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏；
所述当前第一差值阈值和所述当前第二差值阈值均为已知值。
在其中一个优选实施例中，所述方法还包括：
在判定发生制冷剂泄漏后，基于所述当前第一差值和所述当前第二差值确定空调器的实际制冷剂量。
在其中一个优选实施例中，基于所述当前第一差值和所述当前第二差值确定空调器的实际制冷剂量，具体包括：
分别计算所述当前第一差值与所述当前第一差值阈值之间的当前第一差值之差以及所述当前第二差值与所述当前第二差值阈值之间的当前第二差值之差；
确定所述当前第一差值之差和所述当前第二差值之差所属的当前差值之差范围；
根据已知的差值之差范围与制冷剂量的匹配关系，确定与所述当前差值之差相匹配的当前制冷剂量，确定为所述实际制冷剂量。
在其中一个优选实施例中，所述的当前第一差值阈值和所述的当前第二差值阈值采用下述方法确定：
确定所述当前运转频率所属的频率范围；
根据已知的频率范围与差值阈值的匹配关系，确定与所述当前运转频率相匹配的所述当前第一差值阈值和所述当前第二差值阈值。
在其中一个优选实施例中，所述方法还包括：
在判定发生制冷剂泄漏时，发出报警提示。
为实现上述发明目的，本发明提供的空调器制冷剂检测装置采用下述技术方案予以实现：
一种空调器制冷剂检测装置，所述装置包括：
当前运转频率获取单元，用于在空调器运行时，实时获取压缩机的当前运转频率；
当前进气管振动频率获取单元，用于在空调器运行时，实时获取与压缩机的进气口连接的进气管的当前进气管振动频率；
当前排气管振动频率获取单元，用于在空调器运行时，实时获取与压缩机的排气口连接的排气管的当前排气管振动频率；
当前第一差值获取单元，用于获取所述当前运转频率与所述当前进气管振动频率之间的当前第一差值；
当前第二差值获取单元，用于获取所述当前运转频率与所述当前排气管振动频率之间的当前第二差值；
结果确定单元，用于在满足所述当前第一差值大于当前第一差值阈值且所述当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏；
所述当前第一差值阈值和所述当前第二差值阈值均为已知值。
在其中一个优选实施例中，所述装置还包括：
实际制冷剂量确定单元，用于在所述结果确定单元确定发生制冷剂泄漏后，基于所述当前第一差值和所述当前第二差值确定空调器的实际制冷剂量。
在其中一个优选实施例中，所述装置还包括：
报警单元，用于在所述结果确定单元确定发生制冷剂泄漏时，发出报警提示。
本发明的又一目的在于提供一种空调器，包括压缩机，所述空调器还包括有上述的空调器制冷剂检测装置。
本发明的再一目的在于提供一种电子设备，包括处理器、存储器及存储在所述存储器上的计算机程序，所述处理器配置为执行所述计算机程序，实现上述的空调器制冷剂检测方法。
与现有技术相比，本发明的优点和积极效果是：
本发明提供的空调器制冷剂检测方法及检测装置，利用压缩机的运转频率、进气管振动频率和排气管振动频率作为判断参量，基于运转频率与两个振动频率的差值执行制冷剂检测，在差值超过一定的差值阈值时，判定发生制冷剂泄漏；因在一个循环周期内制冷剂均会集中于压缩机并经过压缩机的进气管路和排气管路，且进气管路和排气管路中的制冷剂量的不同会产生不同的管路振动频率，那么，在空调器制冷剂发生泄漏而导致制冷剂量变化后，该变化会快速地通过压缩机的进气管路及吸气管路的振动频率反映出来；并且，在空调器安装到位后，进气管路及排气管路的振动的主要影响因素在于压缩机自身的运转频率以及通过管路的制冷剂量；所以，根据压缩机的运转频率、进气管振动频率和排气管振动频率作为制冷剂判断参量，既能快速地跟踪制冷剂的变化，提高制冷剂检测的快速性，且能够排除其他因素的干扰，提高制冷剂检测的准确性，进而避免对制冷剂泄漏产生误判而影响空调器的使用性能和安全性能。
结合附图阅读本发明的具体实施方式后，本发明的其他特点和优点将变得更加清楚。
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明空调器制冷剂检测方法一个实施例的流程示意图；
图2为本发明空调器制冷剂检测方法又一个实施例的流程示意图；
图3为本发明空调器制冷剂检测装置一个实施例的结构示意图；
图4为本发明空调器制冷剂检测装置另一个实施例的结构示意图；
图5为本发明的电子设备一个实施例的结构示意图。
为了使本发明的目的、技术方案及优点更加清楚明白，以下将结合附图和实施例，对本发明作进一步详细说明。
需要说明的是，本发明各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时，应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
下述各实施例提供的空调器，通过使用压缩机、冷凝器、膨胀阀和蒸发器来执行空调器的制冷制热循环。制冷制热循环包括一系列过程，涉及压缩、冷凝、膨胀和蒸发，对室内空间进行制冷或制热。
空调器的制冷工作原理是：压缩机工作使室内热交换器（在室内机中，此时为蒸发器）内处于超低压状态，室内热交换器内的液态冷媒迅速蒸发吸收热量，室内风机吹出的风经过室内热交换器盘管降温后变为冷风吹到室内。蒸发气化后的冷媒经压缩机加压后，在室外热交换器（在室外机中，此时为冷凝器）中的高压环境下凝结为液态，释放出热量，通过室外风机，将热量散发到大气中，如此循环就达到了制冷效果。
空调器的制热工作原理是：气态冷媒被压缩机加压，成为高温高压气体，进入室内热交换器（此时为冷凝器），冷凝液化放热，成为液体，同时将室内空气加热，从而达到提高室内温度的目的。液体冷媒经节流装置减压，进入室外热交换器（此时为蒸发器），蒸发气化吸热，成为气体，同时吸取室外空气的热量（室外空气变得更冷)，成为气态冷媒，再次进入压缩机开始下一个循环。
本发明为了解决现有技术中空调器制冷剂检测存在的速度慢、精度低的技术问题，创造性地提出利用压缩机的运转频率、进气管振动频率和排气管振动频率作为判断参量，对制冷剂进行检测，达到了提高制冷剂检测的快速性，且能够排除其他因素的干扰，提高制冷剂检测的准确性的技术目的。更具体的技术手段的实现及所产生的技术效果，详见下述各实施例的描述。
图1示出了本发明空调器制冷剂检测方法一个实施例的流程示意图。
如图1所示，该实施例采用下述过程检测空调器制冷剂。
步骤101：空调器运行时，实时获取压缩机的当前运转频率、当前进气管振动频率以及当前排气管振动频率。
压缩机的当前运转频率，是指空调器运行时，按照设定采样频率实时获取的压缩机的运转频率。压缩机的运转频率由空调器控制器进行控制，因此，可由控制器方便地获知当前运转频率。
当前进气管振动频率，是指空调器运行时，按照设定采样频率实时获取的与压缩机的进气口连接的进气管的振动频率，可通过设置在进气管上的振动监测装置获知。
当前排气管振动频率，是指空调器运行时，按照设定采样频率实时获取的与压缩机的排气口连接的排气管的振动频率，可通过设置在排气管上的振动监测装置获知。
步骤102：获取当前运转频率与当前进气管振动频率之间的当前第一差值，以及当前运转频率与当前排气管振动频率之间的当前第二差值。
步骤103：在满足当前第一差值大于当前第一差值阈值且当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏。
其中，当前第一差值阈值和当前第二差值阈值均为已知值。具体的，两个阈值为在空调器出厂前，由研发人员通过理论分析、实验模拟、样机测试等综合手段所确定的，且为空调器制冷剂量为正常状态下时、压缩机在一定的运转频率下、反映进气管的振动频率和排气管的振动频率的临界值。
如果当前第一差值大于当前第一差值阈值，且当前第二差值大于当前第二差值阈值，表明进气管的振动频率和排气管的振动频率均超过了制冷剂量正常时的临界频率值，且是因制冷剂量减少造成吸气量、排气量减少而导致进气管和排气管的振动频率变大。此情况下，判定发生了制冷剂泄漏。
在该实施例中，利用压缩机的运转频率、进气管振动频率和排气管振动频率作为判断参量，基于运转频率与两个振动频率的差值执行制冷剂检测，在差值超过一定的差值阈值时，判定发生制冷剂泄漏。因在一个循环周期内制冷剂均会集中于压缩机并经过压缩机的进气管路和排气管路，且进气管路和排气管路中的制冷剂量的不同会产生不同的管路振动频率，那么，在空调器制冷剂发生泄漏而导致制冷剂量变化后，该变化会快速地通过压缩机的进气管路及吸气管路的振动频率反映出来；并且，在空调器安装到位后，进气管路及排气管路的振动的主要影响因素在于压缩机自身的运转频率以及通过管路的制冷剂量；所以，根据压缩机的运转频率、进气管振动频率和排气管振动频率作为制冷剂判断参量，既能快速地跟踪制冷剂的变化，提高制冷剂检测的快速性，且能够排除其他因素的干扰，提高制冷剂检测的准确性，进而避免对制冷剂泄漏产生误判而影响空调器的使用性能和安全性能。另外，同时基于吸气管振动频率和排气管振动频率进行判断，避免采用单一频率判断容易产生的判断误差，进一步保证判断的准确性。
图2示出了本发明空调器制冷剂检测方法又一个实施例的流程示意图。
如图2所示，该实施例采用下述过程检测空调器制冷剂。
步骤201：空调器运行时，实时获取压缩机的当前运转频率、当前进气管振动频率当前排气管振动频率、当前第一差值阈值及当前第二差值阈值。
压缩机的当前运转频率，是指空调器运行时，按照设定采样频率实时获取的压缩机的运转频率。压缩机的运转频率由空调器控制器进行控制，因此，可由控制器方便地获知当前运转频率。
当前进气管振动频率，是指空调器运行时，按照设定采样频率实时获取的与压缩机的进气口连接的进气管的振动频率，可通过设置在进气管上的振动监测装置获知。
当前排气管振动频率，是指空调器运行时，按照设定采样频率实时获取的与压缩机的排气口连接的排气管的振动频率，可通过设置在排气管上的振动监测装置获知。
当前第一差值阈值及当前第二差值阈值为已知值，且采用下述方法确定：
确定当前运转频率所属的频率范围；
根据已知的频率范围与差值阈值的匹配关系，确定与当前运转频率相匹配的当前第一差值阈值和所述当前第二差值阈值。
其中，频率范围与差值阈值的匹配关系在空调器出厂前获取并预置在空调器内。采用上述方法，能够基于压缩机的实时运转频率动态选取相匹配的第一差值阈值和第二差值阈值，与采用固定不变的差值阈值相比，能够进一步提高制冷剂检测的精度。
步骤202：获取当前运转频率与当前进气管振动频率之间的当前第一差值，以及当前运转频率与当前排气管振动频率之间的当前第二差值。
步骤203：在满足当前第一差值大于当前第一差值阈值且当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏。
如果当前第一差值大于当前第一差值阈值，且当前第二差值大于当前第二差值阈值，表明进气管的振动频率和排气管的振动频率均超过了制冷剂量正常时的临界频率值，且是因制冷剂量减少造成吸气量、排气量减少而导致进气管和排气管的振动频率变大。此情况下，判定发生了制冷剂泄漏。
步骤204：发出报警提示，并确定空调器的实际制冷剂量，
在步骤203判定发生制冷剂泄漏后，发出报警提示，提示用户进行检测和维修，同时停止空调器的压缩机，减少压缩机继续运行而加剧制冷剂泄漏和产生更大的危害。同时，还进一步确定空调器的实际制冷剂量，以便于判断泄漏等级，根据泄漏等级执行不同的处理。具体的，是根据当前第一差值和当前第二差值确定空调器的实际制冷剂量，更具体的确定方法为步骤205的过程。
步骤205：计算当前第一差值与当前第一差值阈值之间的当前第一差值之差以及当前第二差值与当前第二差值阈值之间的当前第二差值之差，确定所属当前差值之差范围，确定实际制冷剂量。
空调器中预置有差值之差范围与制冷剂量的匹配关系，该匹配关系由研发人员通过理论分析、实验模拟、样机测试等综合手段所确定。
在获得了当前第一差值之差和当前第二差值之差之后，分别确定出当前第一差值之差和当前第二差值之差所属的当前差值之差范围。然后，根据差值之差范围与制冷剂量的匹配关系，确定出与当前差值之差范围相匹配的当前制冷剂量，该当前制冷剂量即为空调器当前的实际制冷剂量。
采用该实施例的方法，既能快速地跟踪制冷剂的变化，提高制冷剂检测的快速性，且能够排除其他因素的干扰，提高制冷剂检测的准确性，进而避免对制冷剂泄漏产生误判而影响空调器的使用性能和安全性能。另外，同时基于吸气管振动频率和排气管振动频率进行判断，避免采用单一频率判断容易产生的判断误差，进一步保证判断的准确性。而且，还能够基于压缩机运转频率、吸气管振动频率和排气管振动频率确定出发生制冷剂泄漏后空调器内的实际制冷剂量，便于了解制冷剂情况，以便于判断泄漏等级，进而根据泄漏等级执行不同的处理。
图3所示为本发明空调器制冷剂检测装置一个实施例的结构示意图。
如图3所示，该实施例的检测装置包括的结构单元、结构单元的功能及相互之间的连接关系，具体描述如下。
如图3所示，检测装置包括：
当前运转频率获取单元31，用于在空调器运行时，实时获取压缩机的当前运转频率。
当前进气管振动频率获取单元32，用于在空调器运行时，实时获取与压缩机的进气口连接的进气管的当前进气管振动频率。
当前排气管振动频率获取单元33，用于在空调器运行时，实时获取与压缩机的排气口连接的排气管的当前排气管振动频率。
当前第一差值获取单元34，用于获取当前运转频率获取单元31获取的当前运转频率与当前进气管振动频率获取单元32获取的当前进气管振动频率之间的当前第一差值。
当前第二差值获取单元35，用于获取当前运转频率获取单元31获取的当前运转频率与当前排气管振动频率获取单元33获取的当前排气管振动频率之间的当前第二差值。
结果确定单元36，用于根据当前第一差值获取单元34获取的当前第一差值以及当前第二差值获取单元35获取的当前第二差值进行制冷剂判断，具体的是，是在满足当前第一差值大于当前第一差值阈值且当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏。所述当前第一差值阈值和所述当前第二差值阈值均为已知值。
上述结构的控制装置，运行相应的软件程序，执行相应的功能，按照图1空调器制冷剂检测方法实施例及其优选实施例的过程进行空调器制冷剂检测，达到与图1实施例及其优选实施例的相应技术效果。
图4所示为本发明空调器制冷剂检测装置一个实施例的结构示意图。
如图4所示，该实施例的检测装置包括的结构单元、结构单元的功能及相互之间的连接关系，具体描述如下。
如图4所示，检测装置包括：
当前运转频率获取单元41，用于在空调器运行时，实时获取压缩机的当前运转频率。
当前进气管振动频率获取单元42，用于在空调器运行时，实时获取与压缩机的进气口连接的进气管的当前进气管振动频率。
当前排气管振动频率获取单元43，用于在空调器运行时，实时获取与压缩机的排气口连接的排气管的当前排气管振动频率。
当前第一差值获取单元44，用于获取当前运转频率获取单元41获取的当前运转频率与当前进气管振动频率获取单元42获取的当前进气管振动频率之间的当前第一差值。
当前第二差值获取单元45，用于获取当前运转频率获取单元41获取的当前运转频率与当前排气管振动频率获取单元43获取的当前排气管振动频率之间的当前第二差值。
结果确定单元46，用于根据当前第一差值获取单元44获取的当前第一差值以及当前第二差值获取单元45获取的当前第二差值进行制冷剂判断，具体的是，是在满足当前第一差值大于当前第一差值阈值且当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏。
报警单元47，用于在结果确定单元46确定发生制冷剂泄漏时，发出报警提示。
实际制冷剂量确定单元48，用于在结果确定单元46确定发生制冷剂泄漏后，基于当前第一差值和当前第二差值确定空调器的实际制冷剂量。
上述结构的控制装置，运行相应的软件程序，执行相应的功能，按照图2空调器制冷剂检测方法实施例及其优选实施例的过程进行空调器制冷剂检测，达到与图2实施例及其优选实施例的相应技术效果。
上述各实施例的空调器制冷剂检测装置应用于空调器中，可提高空调器制冷剂检测的速度和准确性。
图5示出了本发明的电子设备一个实施例的结构框图。该电子设备包括处理器51、存储器52及存储在存储器52上的计算机程序521，处理器51配置为执行该计算机程序521，实现图1实施例、图2实施例及其他优选实施例的空调器制冷剂检测方法，并实现相应实施例的技术效果。电子设备可为空调器的主控板、控制器等。
以上实施例仅用以说明本发明的技术方案，而非对其进行限制；尽管参照前述实施例对本发明进行了详细的说明，对于本领域的普通技术人员来说，依然可以对前述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或替换，并不使相应技术方案的本质脱离本发明所要求保护的技术方案的精神和范围。
Claims (10)
- 一种空调器制冷剂检测方法，其特征在于，所述方法包括：空调器运行时，实时获取压缩机的当前运转频率、与压缩机的进气口连接的进气管的当前进气管振动频率以及与压缩机的排气口连接的排气管的当前排气管振动频率；获取所述当前运转频率与所述当前进气管振动频率之间的当前第一差值，以及获取所述当前运转频率与所述当前排气管振动频率之间的当前第二差值；在满足所述当前第一差值大于当前第一差值阈值且所述当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏；所述当前第一差值阈值和所述当前第二差值阈值均为已知值。
- 根据权利要求1所述的空调器制冷剂检测方法，其特征在于，所述方法还包括：在判定发生制冷剂泄漏后，基于所述当前第一差值和所述当前第二差值确定空调器的实际制冷剂量。
- 根据权利要求2所述的空调器制冷剂检测方法，其特征在于，基于所述当前第一差值和所述当前第二差值确定空调器的实际制冷剂量，具体包括：分别计算所述当前第一差值与所述当前第一差值阈值之间的当前第一差值之差以及所述当前第二差值与所述当前第二差值阈值之间的当前第二差值之差；确定所述当前第一差值之差和所述当前第二差值之差所属的当前差值之差范围；根据已知的差值之差范围与制冷剂量的匹配关系，确定与所述当前差值之差相匹配的当前制冷剂量，确定为所述实际制冷剂量。
- 根据权利要求1所述的空调器制冷剂检测方法，其特征在于，所述的当前第一差值阈值和所述的当前第二差值阈值采用下述方法确定：确定所述当前运转频率所属的频率范围；根据已知的频率范围与差值阈值的匹配关系，确定与所述当前运转频率相匹配的所述当前第一差值阈值和所述当前第二差值阈值。
- 根据权利要求1至4中任一项所述的空调器制冷剂检测方法，其特征在于，所述方法还包括：在判定发生制冷剂泄漏时，发出报警提示。
- 一种空调器制冷剂检测装置，其特征在于，所述装置包括：当前运转频率获取单元，用于在空调器运行时，实时获取压缩机的当前运转频率；当前进气管振动频率获取单元，用于在空调器运行时，实时获取与压缩机的进气口连接的进气管的当前进气管振动频率；当前排气管振动频率获取单元，用于在空调器运行时，实时获取与压缩机的排气口连接的排气管的当前排气管振动频率；当前第一差值获取单元，用于获取所述当前运转频率与所述当前进气管振动频率之间的当前第一差值；当前第二差值获取单元，用于获取所述当前运转频率与所述当前排气管振动频率之间的当前第二差值；结果确定单元，用于在满足所述当前第一差值大于当前第一差值阈值且所述当前第二差值大于当前第二差值阈值时，判定发生制冷剂泄漏；所述当前第一差值阈值和所述当前第二差值阈值均为已知值。
- 根据权利要求6所述的空调器制冷剂检测装置，其特征在于，所述装置还包括：实际制冷剂量确定单元，用于在所述结果确定单元确定发生制冷剂泄漏后，基于所述当前第一差值和所述当前第二差值确定空调器的实际制冷剂量。
- 根据权利要求6或7所述的空调制冷剂检测装置，其特征在于，所述装置还包括：报警单元，用于在所述结果确定单元确定发生制冷剂泄漏时，发出报警提示。
- 一种空调器，包括压缩机，其特征在于，所述空调器还包括有上述权利要求6-8中任一项所述的空调器制冷剂检测装置。
- 一种电子设备，包括处理器、存储器及存储在所述存储器上的计算机程序，其特征在于，所述处理器配置为执行所述计算机程序，实现上述权利要求1至5中任一项所述的空调器制冷剂检测方法。
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| EP3477274A1 (de) * | 2017-09-25 | 2019-05-01 | Vaillant GmbH | Leckage-erkennung |
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| EP3477274A1 (de) * | 2017-09-25 | 2019-05-01 | Vaillant GmbH | Leckage-erkennung |
| US20190170603A1 (en) * | 2017-12-01 | 2019-06-06 | Johnson Controls Technology Company | Systems and methods for refrigerant leak management based on acoustic leak detection |
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