CN112178868B - Air conditioner fault detection method and device - Google Patents
Air conditioner fault detection method and device Download PDFInfo
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- CN112178868B CN112178868B CN202011009847.8A CN202011009847A CN112178868B CN 112178868 B CN112178868 B CN 112178868B CN 202011009847 A CN202011009847 A CN 202011009847A CN 112178868 B CN112178868 B CN 112178868B
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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
- F24F11/38—Failure diagnosis
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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
- F24F11/62—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
Abstract
The invention is suitable for the technical field of fault detection, and provides an air conditioner fault detection method and device, wherein the detection method comprises the following steps: acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree; and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity. The method establishes a plurality of factors including outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree as detection logics of detection conditions, and improves the accuracy of fault detection of air conditioner refrigerant leakage or insufficient perfusion quantity.
Description
Technical Field
The invention belongs to the technical field of fault detection, and particularly relates to a method and a device for detecting air conditioner faults.
Background
In recent years, with global temperature rise and great improvement of living standard of people, air conditioning equipment has gradually become one of electric appliances essential for life, and with market competition becoming more and more intense, the working efficiency and safety of the air conditioner increasingly become one of the main factors influencing the core competitiveness of products.
In practical use, air conditioning system faults caused by refrigerant leakage or insufficient filling amount occur occasionally, which seriously reduces product competitiveness. On one hand, the leakage of the refrigerant can reduce the working efficiency of the air conditioner, and meanwhile, the leaked refrigerant is discharged into the atmosphere, so that the ozone layer is damaged, and a series of hazards such as greenhouse effect and the like are caused; on the other hand, the leakage or insufficient filling amount of the refrigerant can reduce the cooling performance of the compressor and greatly increase the exhaust temperature, so that the service life of the compressor is shortened, and even the compressor is burnt and exploded. Therefore, it is necessary to detect the refrigerant leakage or the insufficient filling amount in the air conditioner in time.
At present, the refrigerant leakage phenomenon is generally found when the user installs the air conditioner and then feeds back that the air conditioner does not refrigerate or the refrigeration effect is poor, and the refrigerant leakage amount of the air conditioning system is more or the perfusion amount is not enough and the gap is larger, often causes larger influence to the life of the user, and directly starts the compressor when the leakage amount is more or the perfusion amount is not enough and also can cause permanent damage or even explosion to the compressor.
In the existing air conditioner fault detection method, only the comparison between the indoor coil temperature and the set coil temperature is used for judging whether refrigerant leakage or insufficient perfusion occurs, but when the refrigerant does not leak or insufficient perfusion and the difference between the indoor environment temperature and the indoor coil temperature is large, the indoor coil temperature also changes sharply, so that the difference between the indoor coil temperature and the set coil temperature is large, and the refrigerant leakage or insufficient perfusion occurs in misjudgment, therefore, the refrigerant leakage or insufficient perfusion detection method in the prior art has single logic judgment and is easy to cause misjudgment.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a reliable, safe, fast and accurate method for detecting refrigerant leakage or insufficient filling amount.
Disclosure of Invention
In view of this, embodiments of the present invention provide an air conditioner fault detection method and apparatus, so as to solve the problem that a detection method of refrigerant leakage or insufficient perfusion amount in the prior art is single in logical judgment and is prone to erroneous judgment.
A first aspect of an embodiment of the present invention provides an air conditioner fault detection method, including:
acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree;
when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity; wherein the first preset condition comprises:
the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure.
Optionally, before the obtaining of the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner, and the supercooling degree of the air conditioner, the detection method further includes:
acquiring the temperature and the load of the air conditioner within a preset range of the position of the air conditioner;
and when the temperature in the preset range of the position of the air conditioner is lower than a third preset temperature or the load of the air conditioner is lower than or equal to the preset load of the air conditioner, acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner.
Optionally, before the obtaining of the temperature within the preset range of the position where the air conditioner is located and the load of the air conditioner, the detection method further includes:
acquiring the running time of an air conditioner and the air supply temperature of the air conditioner;
when the running time is longer than the preset time and the air supply temperature is higher than the first preset temperature or lower than the second preset temperature, acquiring the temperature of the air conditioner in a preset range and the load of the air conditioner; the first preset temperature is larger than the preset air supply temperature of the air conditioner, and the second preset temperature is smaller than the preset air supply temperature of the air conditioner.
Optionally, when it is detected that the outdoor temperature, the discharge pressure, the suction pressure, and the supercooling degree satisfy a first preset condition, it is determined that a refrigerant leakage or insufficient perfusion amount fault exists in the air conditioner, including:
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition and the duration time is longer than a first preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
Optionally, when the outdoor temperature cannot be obtained, before the fault that the refrigerant leaks or the filling amount is insufficient is determined to exist in the air conditioner, the method further includes:
acquiring the suction pressure of an air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running at the current running frequency;
and when the suction pressure is detected to be smaller than a fourth preset pressure and the current of the compressor running at the current running frequency is detected to be larger than the first preset current, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion.
Optionally, when it is detected that the suction pressure is smaller than a fourth preset pressure and the current of the compressor running at the current running frequency is greater than a first preset current, it is determined that a fault that a refrigerant leaks or the perfusion amount is insufficient exists in the air conditioner, including:
and when the suction pressure is detected to be smaller than a fourth preset pressure, the current of the compressor running at the current running frequency is detected to be larger than the first preset current, and the duration time is detected to be larger than the second preset time, the air conditioner is judged to have the fault of refrigerant leakage or insufficient perfusion.
Optionally, when the exhaust pressure of the air conditioner and the suction pressure of the air conditioner cannot be obtained, before the fault that the refrigerant leaks or the perfusion amount is insufficient is determined to exist in the air conditioner, the method further includes: acquiring the cold quantity of the air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running under the current running frequency;
and when the current of the compressor running at the current running frequency is detected to be larger than a second preset current and the cold quantity of the air conditioner is detected to be smaller than the preset cold quantity, judging that the air conditioner has the fault of refrigerant leakage or insufficient perfusion quantity.
Optionally, when it is detected that the current of the compressor running at the current running frequency is greater than a second preset current and the cold quantity of the air conditioner is less than a preset cold quantity, it is determined that a fault that a refrigerant leaks or the perfusion quantity is insufficient exists in the air conditioner, including:
and when detecting that the current of the compressor running at the current running frequency is greater than a second preset current, the cold quantity of the air conditioner is less than a preset cold quantity, and the duration time is greater than a third preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
Optionally, after the fault that the refrigerant leaks or the perfusion amount is insufficient is determined to exist in the air conditioner, the detection method further includes:
acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree;
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected not to meet the first preset condition and the duration time is longer than a fourth preset time, judging that the air conditioner has no fault of refrigerant leakage or insufficient perfusion quantity.
A second aspect of an embodiment of the present invention provides an air conditioner fault detection apparatus, including:
the acquisition module is used for acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner;
the detection module is used for judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity when detecting that the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet a first preset condition; wherein the first preset condition comprises:
the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure.
The embodiment of the invention provides an air conditioner fault detection method, which comprises the steps of firstly, obtaining outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree as detection conditions; judging whether the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity by judging whether the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet a first preset condition, and judging that the fault exists when the first preset condition is met. The first preset condition includes: the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature; or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature; or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature; the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure. When the air conditioner has no refrigerant leakage or insufficient filling quantity fault and has refrigerant leakage or insufficient filling quantity fault, the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet different relations, the fault method detection method establishes perfect detection logics of four conditions of the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree, and ensures the accuracy of fault detection.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of a method for detecting faults of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an air conditioner fault detection device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, an embodiment of the present invention provides an air conditioner fault detection method, including:
and S101, acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner.
In the embodiment of the invention, when the air conditioner has no fault of refrigerant leakage or insufficient filling quantity and has the fault of refrigerant leakage or insufficient filling quantity, the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree have different mapping relations, so that whether the air conditioner has the fault of refrigerant leakage or insufficient filling quantity can be judged by monitoring the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree.
Step S102, when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity; wherein the first preset condition comprises:
the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure.
In the embodiment of the invention, the supercooling degree of the air conditioner is one of necessary judgment conditions, and when the air conditioner has a fault of refrigerant leakage or insufficient perfusion amount, the supercooling degree is certainly lower than a temperature; under different outdoor conditions, the alarm value of the exhaust pressure is different and rises along with the rise of the outdoor temperature; the alarm value of the suction pressure does not change along with the change of the outdoor temperature; the alarm values of the corresponding exhaust pressure at different room temperatures and the alarm value of the suction pressure are combined with the supercooling degree of the air conditioner to serve as detection conditions, faults of refrigerant leakage or insufficient perfusion amount are detected, and the detection accuracy can be improved. The first preset pressure, the second preset pressure, the third preset pressure, the fourth preset pressure of the suction pressure, the fourth preset temperature of the outdoor temperature, the fifth preset temperature and the sixth preset temperature of the supercooling degree of the exhaust pressure are set according to actual use conditions, and data of different types of air conditioners are different; specifically, when the preset values are set, a large amount of outdoor temperature, exhaust pressure, suction pressure and supercooling degree data of each type during air conditioner refrigerant leakage or insufficient perfusion fault and during normal operation can be acquired through the moving loop system, data statistical analysis is carried out, and each preset value capable of judging the air conditioner refrigerant leakage or insufficient perfusion fault is acquired.
The air conditioner fault detection method provided by the embodiment of the invention comprises the steps of firstly obtaining the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner as detection conditions; judging whether the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity by judging whether the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet a first preset condition, and judging that the fault exists when the first preset condition is met. The first preset condition includes: the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature; or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature; or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature; the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure. When the air conditioner has no refrigerant leakage or insufficient filling quantity fault and has refrigerant leakage or insufficient filling quantity fault, the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet different relations, the fault method detection method establishes perfect detection logics of four conditions of the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree, and ensures the accuracy of fault detection.
In some embodiments, before the obtaining of the outdoor temperature, the discharge pressure of the air conditioner, the suction pressure of the air conditioner, and the supercooling degree of the air conditioner, the detection method may further include:
acquiring the temperature and the load of the air conditioner within a preset range of the position of the air conditioner;
and when the temperature in the preset range of the position of the air conditioner is lower than a third preset temperature or the load of the air conditioner is lower than or equal to the preset load of the air conditioner, acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner.
In the embodiment of the invention, in order to further improve the detection accuracy, eliminate the influence of air conditioner load change caused by temperature change in the preset range of the position where the air conditioner is located, prevent the misjudgment of the fault detection of refrigerant leakage or insufficient perfusion amount, and before the detection of the fault of refrigerant leakage or insufficient perfusion amount, the temperature and the load of the air conditioner in the preset range of the position where the air conditioner is located can be obtained. If the temperature in the preset range of the position where the air conditioner is located is detected to be greater than or equal to the third preset temperature and the load of the air conditioner is greater than the preset load of the air conditioner, it is indicated that the load of the air conditioner is increased possibly because the air conditioner has a local hot spot. If fault detection is performed on air conditioner refrigerant leakage or insufficient filling amount, the exhaust pressure, the suction pressure and the supercooling degree of the air conditioner are affected, and the detection accuracy is reduced. Therefore, the temperature and the load of the air conditioner within the preset range of the position of the air conditioner are obtained, the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner are obtained after the possibility is eliminated, the fault detection of the leakage or insufficient perfusion quantity of the refrigerant of the air conditioner is carried out, and the detection accuracy is improved. In one embodiment, the preset range, the third preset temperature and the preset load of the air conditioner may be obtained by acquiring temperature and air conditioner load data in each range of each model through a moving loop system, and performing statistics according to the operation state of the air conditioner.
In some embodiments, before the obtaining the temperature and the load of the air conditioner within the preset range of the location where the air conditioner is located, the detecting method may further include:
acquiring the running time of an air conditioner and the air supply temperature of the air conditioner;
when the running time is longer than the preset time and the air supply temperature is higher than the first preset temperature or lower than the second preset temperature, acquiring the temperature of the air conditioner in a preset range and the load of the air conditioner; the first preset temperature is larger than the preset air supply temperature of the air conditioner, and the second preset temperature is smaller than the preset air supply temperature of the air conditioner.
In the embodiment of the invention, in order to improve the accuracy of eliminating the influence of the air conditioner load change caused by the temperature change in the preset range of the position where the air conditioner is located and prevent the influence of insufficient running time on the running state of the air conditioner, the running time of the air conditioner is firstly obtained before the temperature and the load of the air conditioner in the preset range of the position where the air conditioner is located are obtained. And acquiring the air supply temperature of the air conditioner as a condition for initially judging whether the air conditioner is abnormal, and further judging which fault exists after the air conditioner is initially judged to be abnormal. The preset time, the first preset temperature and the second preset temperature are set according to the actual situation; the preset air supply temperature of the air conditioner, namely the air supply temperature set by the current air conditioner, is a standard temperature value. In one embodiment, the preset time may be set to one hour, the first preset temperature is a temperature 10% higher than the preset air supply temperature, and the second preset temperature is a temperature 10% lower than the preset air supply temperature, that is, after it is detected that the air conditioner is started up and operated for 1 hour and the air supply temperature in the operation process deviates from the set temperature by 10%, the temperature within the preset range of the position where the air conditioner is located and the load of the air conditioner are obtained.
In another embodiment, when the operation time of the air conditioner is greater than the preset time and the air supply temperature is greater than the first preset temperature or less than the second preset temperature, the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner are obtained; the first preset temperature is higher than the preset air supply temperature of the air conditioner, and the second preset temperature is lower than the preset air supply temperature of the air conditioner.
In some embodiments, the determining that the air conditioner has a refrigerant leakage or insufficient injection amount fault when it is detected that the outdoor temperature, the discharge pressure, the suction pressure and the supercooling degree satisfy a first preset condition may include:
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition and the duration time is longer than a first preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
In the embodiment of the invention, when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet the first preset condition and the duration is longer than the first preset time, the fault that the refrigerant leaks or the filling amount is insufficient is judged, and the error judgment caused by the operation fluctuation of the air conditioner can be reduced by the arrangement, so that the detection accuracy is improved. The first preset time is set to meet the actual requirement, and cannot be too long, so that the fault is prevented from further aggravating, and for example, the first preset time can be set to be 1 minute.
In some embodiments, when the outdoor temperature cannot be obtained, before the determining that the air conditioner has a refrigerant leakage or insufficient filling amount fault, the method may further include:
acquiring the suction pressure of an air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running at the current running frequency;
and when the suction pressure is detected to be smaller than a fourth preset pressure and the current of the compressor running at the current running frequency is detected to be larger than the first preset current, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion.
In the embodiment of the invention, if the air conditioner is taken as an execution main body, when the air conditioner cannot acquire the outdoor temperature due to the fault of the outdoor sensor, the complement detection of the fault of refrigerant leakage or insufficient perfusion quantity can be carried out based on another detection mode. When the air conditioner normally runs, the running frequency and the running current of the compressor have a corresponding relation, and when the air conditioner normally has a fault of refrigerant leakage or insufficient perfusion quantity, the running frequency and the running current of the compressor do not conform to the corresponding relation. Therefore, the current running frequency of the compressor of the air conditioner and the current of the compressor running under the current running frequency are obtained, and the suction pressure is combined to judge the fault of refrigerant leakage or insufficient perfusion quantity. In one embodiment, if the current of the compressor running at the current running frequency is the rated current when the air conditioner is running in the normal state, the first preset current may be set to be greater than the rated current by m%, where m is a value obtained according to the actual running condition of the air conditioner. The fault detection method provided by the embodiment can be used for standby detection of fault detection of refrigerant leakage or insufficient filling quantity, and can improve the reliability and applicability of detection.
In some embodiments, the determining that the air conditioner has a refrigerant leakage or insufficient perfusion capacity fault when it is detected that the suction pressure is less than a fourth preset pressure and the current of the compressor operating at the current operating frequency is greater than a first preset current may include:
and when the suction pressure is detected to be smaller than a fourth preset pressure, the current of the compressor running at the current running frequency is detected to be larger than the first preset current, and the duration time is detected to be larger than the second preset time, the air conditioner is judged to have the fault of refrigerant leakage or insufficient perfusion.
In the embodiment of the invention, after the suction pressure is detected to be less than the fourth preset pressure, the current of the compressor running at the current running frequency is detected to be greater than the first preset current, and the duration time is detected to be greater than the second preset time, the fault that the refrigerant leaks or the filling amount is insufficient in the air conditioner is judged, and the error judgment caused by the running fluctuation of the air conditioner can be reduced, so that the detection accuracy is improved. This second preset time's setting satisfies actual need, in order to improve the detection accuracy, can set up it and be greater than first preset time, nevertheless prevent to cause the trouble further aggravation, also should not the overlength, for example, can set up the second preset time and be 2 minutes.
In some embodiments, when the discharge pressure of the air conditioner and the suction pressure of the air conditioner cannot be obtained, before the determining that the air conditioner has a fault of refrigerant leakage or insufficient perfusion amount, the method may further include: acquiring the cold quantity of the air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running under the current running frequency;
and when the current of the compressor running at the current running frequency is detected to be larger than a second preset current and the cold quantity of the air conditioner is detected to be smaller than the preset cold quantity, judging that the air conditioner has the fault of refrigerant leakage or insufficient perfusion quantity.
In the embodiment of the invention, if the air conditioner is taken as an execution main body, when the air conditioner cannot acquire the outdoor temperature due to the fault of the air suction/discharge pressure sensor, or when the movable ring system is taken as a detection main body and cannot receive the air suction pressure and the discharge pressure acquired by the air conditioner, the complement detection of the fault of refrigerant leakage or insufficient filling quantity can be carried out based on another detection mode. When the air conditioner normally runs, the running frequency and the running current of the compressor have a corresponding relation, the cold energy of the air conditioner also has a corresponding relation with the running frequency of the compressor, and when the air conditioner normally has a fault that a refrigerant is leaked or the filling amount is insufficient, the running frequency, the running current and the cold energy of the air conditioner do not accord with the corresponding relation. Therefore, the current running frequency of the compressor of the air conditioner and the current of the compressor running under the current running frequency are obtained, cold quantity data are collected and calculated, and faults of refrigerant leakage or insufficient perfusion quantity are judged. In one embodiment, if the current of the compressor running at the current running frequency is the rated current and the cooling capacity of the air conditioner is the rated cooling capacity when the air conditioner is running in the normal state, the second preset current may be set to be greater than m% of the rated current, the preset cooling capacity may be set to be greater than n% of the rated cooling capacity, and m and n are values obtained according to the actual running condition of the air conditioner. The fault detection method provided by the embodiment can be used for standby detection of fault detection of refrigerant leakage or insufficient filling quantity, and can improve the reliability and applicability of detection.
In some embodiments, the determining that the air conditioner has a refrigerant leakage or insufficient perfusion capacity fault when it is detected that the current of the compressor operating at the current operating frequency is greater than a second preset current and the cold quantity of the air conditioner is less than a preset cold quantity may include:
and when detecting that the current of the compressor running at the current running frequency is greater than a second preset current, the cold quantity of the air conditioner is less than a preset cold quantity, and the duration time is greater than a third preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
In the embodiment of the invention, after the current of the compressor running at the current running frequency is detected to be greater than the second preset current, the cold quantity of the air conditioner is smaller than the preset cold quantity, and the duration time is longer than the third preset time, the fault that the refrigerant leaks or the filling quantity is insufficient in the air conditioner is judged, and the error judgment caused by the running fluctuation of the air conditioner can be reduced by the arrangement, so that the detection accuracy is improved. This third preset time's setting satisfies actual need, in order to improve the detection accuracy, can set up it and be greater than first preset time, nevertheless prevent to cause the trouble further aggravation, also should not the overlength, for example, can set up the third preset time and be 2 minutes.
In some embodiments, after determining that the air conditioner has a refrigerant leakage or insufficient filling amount fault, the detecting method may further include:
acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree;
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected not to meet the first preset condition and the duration time is longer than a fourth preset time, judging that the air conditioner has no fault of refrigerant leakage or insufficient perfusion quantity.
In the embodiment of the invention, in order to improve the detection accuracy, when the first preset condition is not met and the fourth preset time is exceeded, the detection is carried out again, and the judgment of the fault of refrigerant leakage or insufficient perfusion volume is stopped. Or after the fault is detected, the air conditioner can be continuously detected after the maintenance personnel maintain the air conditioner, whether the fault that the refrigerant is leaked or the filling amount is insufficient is judged, and the practicability and the convenience are improved. The third preset time is set to meet the actual requirement, and can be set to be the same as the first preset time.
In some embodiments, the detection period of the fault detection method may be daily/monday/monthly, and the specific fault detection time may be set according to actual needs.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Referring to fig. 2, an embodiment of the present invention further provides an air conditioner fault detection apparatus, where the air conditioner fault detection apparatus 20 includes:
the obtaining module 21 is used for obtaining the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner.
The detection module 22 is configured to determine that a refrigerant leakage or insufficient perfusion amount fault exists in the air conditioner when it is detected that the outdoor temperature, the exhaust pressure, the suction pressure, and the supercooling degree meet a first preset condition; wherein the first preset condition comprises:
the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure.
In some embodiments, before the obtaining of the outdoor temperature, the discharge pressure of the air conditioner, the suction pressure of the air conditioner, and the supercooling degree of the air conditioner, the obtaining module may be further configured to:
acquiring the temperature and the load of the air conditioner within a preset range of the position of the air conditioner;
and when the temperature in the preset range of the position of the air conditioner is lower than a third preset temperature or the load of the air conditioner is lower than or equal to the preset load of the air conditioner, acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner.
In some embodiments, before the obtaining of the temperature within the preset range of the location where the air conditioner is located and the load of the air conditioner, the obtaining module may further be configured to:
acquiring the running time of an air conditioner and the air supply temperature of the air conditioner;
when the running time is longer than the preset time and the air supply temperature is higher than the first preset temperature or lower than the second preset temperature, acquiring the temperature of the air conditioner in a preset range and the load of the air conditioner; the first preset temperature is larger than the preset air supply temperature of the air conditioner, and the second preset temperature is smaller than the preset air supply temperature of the air conditioner.
In some embodiments, the determining that the air conditioner has a refrigerant leakage or insufficient injection amount fault when it is detected that the outdoor temperature, the discharge pressure, the suction pressure and the supercooling degree satisfy a first preset condition may include:
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition and the duration time is longer than a first preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
In some embodiments, when the outdoor temperature cannot be obtained, before the air conditioner is determined to have a refrigerant leakage or insufficient perfusion capacity fault, the obtaining module may further be configured to:
acquiring the suction pressure of an air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running at the current running frequency;
the detection module may be further operable to:
and when the suction pressure is detected to be smaller than a fourth preset pressure and the current of the compressor running at the current running frequency is detected to be larger than the first preset current, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion.
In some embodiments, the determining that the air conditioner has a refrigerant leakage or insufficient perfusion capacity fault when it is detected that the suction pressure is less than a fourth preset pressure and the current of the compressor operating at the current operating frequency is greater than a first preset current may include:
and when the suction pressure is detected to be smaller than a fourth preset pressure, the current of the compressor running at the current running frequency is detected to be larger than the first preset current, and the duration time is detected to be larger than the second preset time, the air conditioner is judged to have the fault of refrigerant leakage or insufficient perfusion.
In some embodiments, when the discharge pressure of the air conditioner and the suction pressure of the air conditioner cannot be obtained, before the air conditioner is determined to have a refrigerant leakage or insufficient perfusion capacity fault, the obtaining module may further be configured to:
acquiring the cold quantity of the air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running under the current running frequency;
the detection module may be further operable to:
and when the current of the compressor running at the current running frequency is detected to be larger than a second preset current and the cold quantity of the air conditioner is detected to be smaller than the preset cold quantity, judging that the air conditioner has the fault of refrigerant leakage or insufficient perfusion quantity.
In some embodiments, the determining that the air conditioner has a refrigerant leakage or insufficient perfusion capacity fault when it is detected that the current of the compressor operating at the current operating frequency is greater than a second preset current and the cold quantity of the air conditioner is less than a preset cold quantity may include:
and when detecting that the current of the compressor running at the current running frequency is greater than a second preset current, the cold quantity of the air conditioner is less than a preset cold quantity, and the duration time is greater than a third preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
In some embodiments, after the determining that the air conditioner has the refrigerant leakage or insufficient filling amount fault, the obtaining module may further be configured to:
acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree;
the detection module may be further operable to:
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected not to meet the first preset condition and the duration time is longer than a fourth preset time, judging that the air conditioner has no fault of refrigerant leakage or insufficient perfusion quantity.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing functional units and modules are merely illustrated in terms of division, and in practical applications, the foregoing functional allocation may be performed by different functional units and modules as needed, that is, the internal structure of the air conditioner fault detection apparatus is divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed air conditioner fault detection method and apparatus may be implemented in other manners. For example, the above-described embodiments of the air conditioner fault detection apparatus are merely illustrative, and for example, a module or a unit may be divided into only one logic function, and may be actually implemented in another way, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments described above may be implemented by a computer program, which is stored in a computer readable storage medium and used by a processor to implement the steps of the embodiments of the methods described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. An air conditioner fault detection method is characterized by comprising the following steps:
acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree;
when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity; wherein the first preset condition comprises:
the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure;
before the obtaining of the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner, the detection method further includes:
acquiring the temperature and the load of the air conditioner within a preset range of the position of the air conditioner;
when the temperature in the preset range of the position where the air conditioner is located is lower than a third preset temperature or the load of the air conditioner is lower than or equal to the preset load of the air conditioner, acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner;
before the obtaining of the temperature within the preset range of the position where the air conditioner is located and the load of the air conditioner, the detection method further includes:
acquiring the running time of an air conditioner and the air supply temperature of the air conditioner;
when the running time is longer than the preset time and the air supply temperature is higher than the first preset temperature or lower than the second preset temperature, acquiring the temperature of the air conditioner in a preset range and the load of the air conditioner; the first preset temperature is larger than the preset air supply temperature of the air conditioner, and the second preset temperature is smaller than the preset air supply temperature of the air conditioner.
2. The method for detecting air conditioner faults as claimed in claim 1, wherein the judging that the air conditioner has faults of refrigerant leakage or insufficient filling amount when detecting that the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet a first preset condition comprises:
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected to meet a first preset condition and the duration time is longer than a first preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
3. The method as claimed in claim 1, wherein when the outdoor temperature is not obtained, before the determining that the air conditioner has a refrigerant leakage or insufficient filling amount fault, the method further comprises:
acquiring the suction pressure of an air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running at the current running frequency;
and when the suction pressure is detected to be smaller than a fourth preset pressure and the current of the compressor running at the current running frequency is detected to be larger than the first preset current, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion.
4. The method as claimed in claim 3, wherein the determining that the air conditioner has a refrigerant leakage or insufficient injection amount fault when it is detected that the suction pressure is less than a fourth preset pressure and the current of the compressor operating at the current operating frequency is greater than a first preset current comprises:
and when the suction pressure is detected to be smaller than a fourth preset pressure, the current of the compressor running at the current running frequency is detected to be larger than the first preset current, and the duration time is detected to be larger than the second preset time, the air conditioner is judged to have the fault of refrigerant leakage or insufficient perfusion.
5. The method for detecting air conditioner faults as claimed in claim 1, wherein when the exhaust pressure of the air conditioner and the suction pressure of the air conditioner cannot be obtained, before the fault that the refrigerant leaks or the filling amount is insufficient is judged to exist in the air conditioner, the method further comprises: acquiring the cold quantity of the air conditioner, the current running frequency of a compressor of the air conditioner and the current of the compressor running under the current running frequency;
and when the current of the compressor running at the current running frequency is detected to be larger than a second preset current and the cold quantity of the air conditioner is detected to be smaller than the preset cold quantity, judging that the air conditioner has the fault of refrigerant leakage or insufficient perfusion quantity.
6. The method for detecting the fault of the air conditioner according to claim 5, wherein the step of judging that the air conditioner has the fault of refrigerant leakage or insufficient filling amount when the fact that the current of the compressor running at the current running frequency is larger than a second preset current and the cold quantity of the air conditioner is smaller than the preset cold quantity is detected comprises the following steps:
and when detecting that the current of the compressor running at the current running frequency is greater than a second preset current, the cold quantity of the air conditioner is less than a preset cold quantity, and the duration time is greater than a third preset time, judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity.
7. The method for detecting air conditioner faults as claimed in any one of claims 1 to 6, wherein after the fault that the refrigerant leaks or the filling amount of the air conditioner is insufficient is judged, the method further comprises the following steps:
acquiring outdoor temperature, air conditioner exhaust pressure, air conditioner suction pressure and air conditioner supercooling degree;
and when the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree are detected not to meet the first preset condition and the duration time is longer than a fourth preset time, judging that the air conditioner has no fault of refrigerant leakage or insufficient perfusion quantity.
8. An air conditioner fault detection device, comprising:
the acquisition module is used for acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner;
the detection module is used for judging that the air conditioner has a fault of refrigerant leakage or insufficient perfusion quantity when detecting that the outdoor temperature, the exhaust pressure, the suction pressure and the supercooling degree meet a first preset condition; wherein the first preset condition comprises:
the outdoor temperature is less than or equal to a fourth preset temperature, the exhaust pressure is less than a first preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than a fourth preset temperature and less than a fifth preset temperature, the exhaust pressure is less than a second preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
or the outdoor temperature is greater than or equal to a fifth preset temperature, the exhaust pressure is less than a third preset pressure, the suction pressure is less than a fourth preset pressure, and the supercooling degree is less than a sixth preset temperature;
the third preset pressure is greater than the second preset pressure, and the second preset pressure is greater than the first preset pressure;
the air conditioner fault detection device is further used for:
acquiring the temperature and the load of the air conditioner within a preset range of the position of the air conditioner;
when the temperature in the preset range of the position where the air conditioner is located is lower than a third preset temperature or the load of the air conditioner is lower than or equal to the preset load of the air conditioner, acquiring the outdoor temperature, the exhaust pressure of the air conditioner, the suction pressure of the air conditioner and the supercooling degree of the air conditioner;
the air conditioner fault detection device is further used for:
acquiring the running time of an air conditioner and the air supply temperature of the air conditioner;
when the running time is longer than the preset time and the air supply temperature is higher than the first preset temperature or lower than the second preset temperature, acquiring the temperature of the air conditioner in a preset range and the load of the air conditioner; the first preset temperature is larger than the preset air supply temperature of the air conditioner, and the second preset temperature is smaller than the preset air supply temperature of the air conditioner.
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| CN114151924B (en) * | 2021-12-07 | 2022-12-02 | 珠海格力电器股份有限公司 | Fault determination method and device for air conditioner temperature sensing bulb, air conditioner and storage medium |
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| JP2017053566A (en) * | 2015-09-10 | 2017-03-16 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Refrigeration cycle device |
| CN106918117A (en) * | 2017-03-02 | 2017-07-04 | 青岛海尔空调器有限总公司 | Air conditioner coolant leakage detection method and device |
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