CN109323365B

CN109323365B - Method and apparatus for diagnosing blocking fault of air conditioner, air conditioner and storage medium

Info

Publication number: CN109323365B
Application number: CN201811163192.2A
Authority: CN
Inventors: 王侃; 徐振坤; 罗羽钊; 吴楠; 杜顺开; 李金波
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2021-11-19
Anticipated expiration: 2038-09-30
Also published as: CN109323365A

Abstract

The invention discloses a method and a device for diagnosing a blocking fault of an air conditioner, the air conditioner and a storage medium, wherein the method comprises the following steps: collecting the indoor environment temperature, the outdoor environment temperature and the running frequency of an air conditioner compressor at the current moment; acquiring a pre-stored capacity output standard value and a pre-stored power standard value of the air conditioner in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency; acquiring an actual capacity output value of the air conditioner and an actual running power value of the compressor; and if the actual capacity output value is less than the capacity output standard value and the actual operation power is less than the power standard value, diagnosing that the air conditioner is blocked. The method and the device for diagnosing the air conditioner blocking fault and the air conditioner can provide the reliability and the accuracy for diagnosing the air conditioner blocking fault.

Description

Method and apparatus for diagnosing blocking fault of air conditioner, air conditioner and storage medium

Technical Field

The invention belongs to the technical field of electric appliance manufacturing, and particularly relates to a method for diagnosing a blocking fault of an air conditioner, a device for diagnosing the blocking fault of the air conditioner, the air conditioner and a storage medium.

Background

At present, the method for diagnosing the blockage fault of the air conditioner generally judges through temperature or pressure detection. For example, a temperature range is preset, and if the detected temperature exceeds a set temperature maximum value or is lower than a set temperature minimum value, an alarm is given.

The above-mentioned method for diagnosing the blocking fault of the air conditioner has a simple detection process, cannot judge the air conditioner fault problem of the load, and is not accurate enough to judge the fault only by temperature or pressure.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, a first object of the present invention is to provide a method of diagnosing a blocking fault of an air conditioner, which can improve the reliability and accuracy of the diagnosis of the blocking fault of the air conditioner.

The second purpose of the invention is to provide an air conditioner.

A third object of the invention is to propose a storage medium.

A fourth object of the present invention is to provide an apparatus for diagnosing a blocking fault of an air conditioner.

A fifth object of the present invention is to provide an air conditioner.

In order to achieve the above object, a method for diagnosing a blocking fault of an air conditioner according to an embodiment of a first aspect of the present invention includes: collecting the indoor environment temperature, the outdoor environment temperature and the running frequency of an air conditioner compressor at the current moment; acquiring a pre-stored capacity output standard value and a pre-stored power standard value of the air conditioner in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency; acquiring an actual capacity output value of the air conditioner and an actual running power value of a compressor; diagnosing a blocking fault of the air conditioner if the actual capacity output value is less than the capacity output standard value and the actual operation power value is less than the power standard value.

According to the method for diagnosing the blockage fault of the air conditioner, the blockage diagnosis is judged according to the relation between the capacity output value of the air conditioner and the running power value of the compressor and the corresponding statistical standard value, and compared with a local diagnosis method based on temperature or pressure, the method is higher in reliability and more accurate.

In some embodiments, the method further comprises: acquiring prestored temperature standard values of the compressor in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency, wherein the temperature standard values comprise an exhaust temperature standard value and a first temperature difference threshold value, a return air temperature standard value and a second temperature difference threshold value, and a compressor shell temperature standard value and a third temperature difference threshold value; acquiring the actual exhaust temperature, the actual return air temperature and the actual shell temperature of the compressor; determining that the compressor has reached an overheat condition if any one of the following conditions is satisfied: the difference value between the actual exhaust temperature and the exhaust temperature standard value is greater than the first temperature difference threshold value, the difference value between the actual return air temperature and the return air temperature standard value is greater than the second temperature difference threshold value, and the difference value between the actual shell temperature and the shell temperature standard value is greater than the third temperature difference threshold value. Therefore, whether the blockage occurs can be further confirmed, and the judgment accuracy is improved.

In some embodiments, in the cooling mode, the method further comprises: acquiring temperature standard values of a heat exchanger of the air conditioner in the pre-stored refrigeration mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency, wherein the temperature standard values of the heat exchanger comprise a middle temperature standard value and a first middle temperature difference threshold value of the outdoor heat exchanger, an inlet temperature standard value and a first inlet temperature difference threshold value of the outdoor heat exchanger, and an inlet temperature standard value and a second inlet temperature difference threshold value of the indoor heat exchanger; acquiring the actual middle temperature of the outdoor heat exchanger, the actual inlet temperature of the outdoor heat exchanger and the actual inlet temperature of the indoor heat exchanger; if the following conditions are met, judging that the throttling device of the air conditioner has a blocking fault: the difference value between the actual middle temperature of the outdoor heat exchanger and the middle temperature standard value of the outdoor heat exchanger is greater than the first middle temperature difference threshold value, the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the first inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the second inlet temperature difference threshold value. Therefore, the part where the blockage occurs can be further diagnosed as the throttling device, and the diagnosis is more accurate.

In some embodiments, in the heating mode, the method further comprises: acquiring temperature standard values of a heat exchanger of the air conditioner in the indoor environment temperature, the outdoor environment temperature and the operation frequency in a prestored heating mode, wherein the temperature standard values of the heat exchanger comprise a middle temperature standard value and a second middle temperature difference threshold value of the indoor heat exchanger, an inlet temperature standard value and a third inlet temperature difference threshold value of the indoor heat exchanger, and an inlet temperature standard value and a fourth inlet temperature difference threshold value of the outdoor heat exchanger; acquiring the actual middle temperature of the indoor heat exchanger, the actual inlet temperature of the indoor heat exchanger and the actual inlet temperature of the outdoor heat exchanger; if the following conditions are met, judging that the throttling device of the air conditioner has a blocking fault: the difference value between the actual middle temperature of the indoor heat exchanger and the middle temperature standard value of the indoor heat exchanger is greater than the second middle temperature difference threshold value, the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the third inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the fourth inlet temperature difference threshold value. Therefore, the part where the blockage occurs can be further diagnosed as the throttling device, and the diagnosis is more accurate.

In order to achieve the above object, an air conditioner according to an embodiment of the second aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method for diagnosing the blocking fault of the air conditioner is implemented.

According to the air conditioner provided by the embodiment of the invention, the method for diagnosing the blocking fault of the air conditioner in the embodiment of the first aspect can be realized through the processor and the memory, the blocking fault diagnosis is more accurate, and the reliability is improved.

To achieve the above object, a non-transitory computer-readable storage medium according to an embodiment of the third aspect of the present invention has a computer program stored thereon, and when the computer program is executed by a processor, the method for diagnosing an air conditioner blocking fault is implemented.

According to the non-transitory computer-readable storage medium of the embodiment of the present invention, by storing a computer program that can implement the method of the first aspect, support is provided for implementation of the method.

In order to achieve the above object, an apparatus for diagnosing a blocking fault of an air conditioner according to a fourth aspect of the present invention includes: the first temperature sensor is used for collecting the indoor environment temperature; the second temperature sensor is used for acquiring the outdoor environment temperature; the sensor is used for acquiring the running frequency of a compressor of the air conditioner; and the controller is used for acquiring a pre-stored capacity output standard value and a pre-stored power standard value of the air conditioner in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency, acquiring an actual capacity output value of the air conditioner and an actual operation power value of the compressor, and diagnosing the air conditioner blocking fault when the actual capacity output value is smaller than the capacity output standard value and the actual operation power value is smaller than the power standard value.

According to the device for diagnosing the blockage fault of the air conditioner, the controller is used for judging the blockage diagnosis according to the relation between the capacity output value of the air conditioner and the running power value of the compressor and the corresponding statistical standard value, and compared with a local diagnosis method based on temperature or pressure, the device is higher in reliability and more accurate.

In some embodiments, the apparatus further comprises: a third temperature sensor for acquiring an actual discharge temperature of the compressor; the fourth temperature sensor is used for acquiring the actual return air temperature of the compressor; the fifth temperature sensor is used for acquiring the actual shell temperature of the compressor; the controller is further used for obtaining the temperature standard value of the compressor, wherein the temperature standard value of the compressor comprises an exhaust temperature standard value, a first temperature difference threshold value, a return air temperature standard value, a second temperature difference threshold value, a shell temperature standard value and a third temperature difference threshold value, and when any one of the following conditions is met, the compressor is judged to reach an overheating condition: the difference value between the actual exhaust temperature and the exhaust temperature standard value is greater than the first temperature difference threshold value, the difference value between the actual return air temperature and the return air temperature standard value is greater than the second temperature difference threshold value, and the difference value between the actual shell temperature and the shell temperature standard value is greater than the third temperature difference threshold value. Therefore, whether the blockage occurs can be further confirmed, and the judgment accuracy is improved.

In some embodiments, the apparatus further comprises: the sixth temperature sensor is used for acquiring the actual middle temperature of the outdoor heat exchanger of the air conditioner; the seventh temperature sensor is used for acquiring the actual inlet temperature of the outdoor heat exchanger; the eighth temperature sensor is used for acquiring the actual inlet temperature of the indoor heat exchanger of the air conditioner; in the cooling mode, the controller is further configured to obtain a pre-stored value in the cooling mode, the temperature of the indoor environment is in the cooling mode, the temperature of the outdoor environment is in the operating frequency, and the temperature standard value of the heat exchanger of the air conditioner is a temperature standard value of the heat exchanger, wherein the temperature standard value of the heat exchanger includes a middle temperature standard value of the outdoor heat exchanger and a first middle temperature difference threshold value, an inlet temperature standard value of the outdoor heat exchanger and a first inlet temperature difference threshold value, and an inlet temperature standard value of the indoor heat exchanger and a second inlet temperature difference threshold value, and when the following conditions are met, the blocking fault of the throttling device of the air conditioner is judged: the difference value between the actual middle temperature of the outdoor heat exchanger and the middle temperature standard value of the outdoor heat exchanger is greater than the first middle temperature difference threshold value, the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the first inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the second inlet temperature difference threshold value. Therefore, the part where the blockage occurs can be further diagnosed as the throttling device, and the diagnosis is more accurate.

In some embodiments, the apparatus further comprises: the seventh temperature sensor is used for acquiring the actual inlet temperature of the outdoor heat exchanger of the air conditioner; the eighth temperature sensor is used for acquiring the actual inlet temperature of the indoor heat exchanger of the air conditioner; the ninth temperature sensor is used for acquiring the actual middle temperature of the indoor heat exchanger; under the heating mode, the controller is still used for, acquire prestoring heating the mode and be in indoor ambient temperature outdoor ambient temperature with during the operating frequency the temperature standard value of the heat exchanger of air conditioner, wherein, the temperature standard value of heat exchanger includes indoor heat exchanger's middle part temperature standard value and second middle part difference in temperature threshold value indoor heat exchanger's entry temperature standard value and third entry difference in temperature threshold value outdoor heat exchanger's entry temperature standard value and fourth entry difference in temperature threshold value to when satisfying following condition, judge the throttling arrangement of air conditioner takes place the jam trouble: the difference value between the actual middle temperature of the indoor heat exchanger and the middle temperature standard value of the indoor heat exchanger is greater than the second middle temperature difference threshold value, the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the third inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the fourth inlet temperature difference threshold value. Therefore, the part where the blockage occurs can be further diagnosed as the throttling device, and the diagnosis is more accurate.

In some embodiments, the apparatus further comprises a communication section for obtaining a standard value for cooling capacity and a standard value for power of the air conditioner, a standard value for temperature of the compressor, and a standard value for temperature of the heat exchanger from a cloud platform.

In some embodiments, the device further comprises an alarm, and the alarm is used for giving an alarm prompt when the air conditioner is diagnosed to have the blockage fault, so that a user can be reminded in time.

In order to achieve the above object, an air conditioner according to an embodiment of the fifth aspect of the present invention includes a compressor, a four-way valve, a throttling device, an indoor heat exchanger, an outdoor heat exchanger, and the device for diagnosing a blocking fault of the air conditioner.

According to the air conditioner provided by the embodiment of the invention, the blocking fault of the air conditioner can be more accurately diagnosed by adopting the device for diagnosing the blocking fault of the air conditioner provided by the fourth aspect of the embodiment.

Drawings

FIG. 1 is a flow diagram of a method of diagnosing an air conditioner blocking fault according to one embodiment of the present invention;

FIG. 2 is a flow chart of diagnosing restriction blockage in a cooling mode according to an embodiment of the present invention;

FIG. 3 is a flow chart for diagnosing choke clogging in a heating mode according to an embodiment of the present invention;

fig. 4 is a block diagram of an apparatus for diagnosing an air conditioner blocking fault according to an embodiment of the present invention;

fig. 5 is a block diagram of an apparatus for diagnosing an air conditioner blocking fault according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an apparatus for diagnosing an air conditioner blocking fault in communication with a cloud platform according to an embodiment of the present invention;

fig. 7 is a block diagram of an air conditioner according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A method of diagnosing an air conditioner blocking fault according to an embodiment of the first aspect of the present invention is described below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a method of diagnosing a blocking fault of an air conditioner according to an embodiment of the present invention, which includes, as shown in fig. 1:

and S1, collecting the indoor environment temperature, the outdoor environment temperature and the running frequency of the air conditioner compressor at the current moment.

Specifically, for example, temperature sensors may be provided at an indoor unit and an outdoor unit of an air conditioner, respectively, to collect an indoor ambient temperature and an outdoor ambient temperature, respectively, and a frequency sensor may be designed to detect an operating frequency of a compressor.

And S2, acquiring the pre-stored capacity output standard value and power standard value of the air conditioner in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency.

In the embodiment of the invention, under the condition of normal operation of the air conditioner, the operation parameters of the air conditioner during various operation modes and normal temperature operation corresponding to various indoor environment temperatures, outdoor environment temperatures and compressor operation frequencies are counted in advance through big data statistics, and the statistical value is processed to obtain the statistical standard value under various conditions, wherein the statistical standard value is used as the reference of the air conditioner under the normal operation condition. The statistical standard value may include a capacity output standard value and a power standard value of the air conditioner, and of course, other related parameter values.

The statistical standard value can be stored in the cloud, and corresponding data can be obtained through communication when needed; alternatively, it may be stored locally.

And S3, acquiring the actual capacity output value of the air conditioner and the actual running power value of the compressor.

S4, if the actual capacity output value is less than the capacity output standard value and the actual operation power value is less than the power standard value, diagnosing the air conditioner as having a jam fault.

Specifically, when the air conditioner is in normal operation, the actual capacity output value of the air conditioner is within the allowable range of the capacity output standard value, when the actual capacity output value is smaller than the capacity output standard value, and the actual operation power value of the compressor is smaller than the power standard value, that is, the generated capacity output is lower than the capacity output value which should be generated, it is considered that a blocking fault occurs, for example, when the air conditioner is in operation, water or other impurities may be mixed in the system, or a moving part of the throttling device itself fails, so that after a period of time, a pipeline, particularly the throttling device, may be blocked, so that the refrigerant cannot normally circulate in the circulation system, and the capacity output and the power of the air conditioner are reduced. In the related art, the blocking fault is diagnosed through temperature or pressure, diagnosis is often only based on local conditions, reliability is insufficient, and the reliability is not accurate enough.

For example, in the cooling mode, the operation should be performed specifically on the premise that the air conditioner does not report an error, and the self-limiting or the automatic shutdown due to the fault does not occur. Specifically, the indoor ambient temperature T1, the outdoor ambient temperature T4 and the operating frequency f of the compressor are retrieved, and based on the retrieved values, statistical standard values of the operating parameters of the air conditioner are searched, for example, the statistical standard values include a standard value of the capacity output and a standard value of the power of the air conditioner, and the temperature of each part of the compressor, a standard value of the temperature of the heat exchanger and various set thresholds. And then, a capacity output value Q of the air conditioner during real-time operation and an actual operation power value W of the compressor are called, a pre-stored capacity output standard value Q1 and a pre-stored power standard value W1 corresponding to the refrigeration mode and the current parameters are called at the same time, whether Q < Q1 and W < W1 are met is judged, if so, the blockage of a pipeline of the air conditioner is judged, and particularly, the blockage of a throttling device is more easily caused. In the above two determination conditions, if one is not established, the above steps are re-performed at intervals to perform diagnosis, or other fault diagnosis is performed.

Taking the heating mode as an example for illustration, in the heating mode, for example, the internal ambient temperature is set to T1, the outdoor ambient temperature is set to T4, and the operating frequency f of the compressor is taken as a basis, a pre-stored statistical standard value of the operating parameter of the air conditioner is searched, the capacity of the air conditioner in real-time operation, that is, the cooling capacity Q and the operating power W of the compressor are taken, meanwhile, a pre-stored heating output standard value Q2 and power standard value W2 corresponding to the heating mode and the current parameter are taken, whether Q < Q2 and W < W2 are met is judged, and if so, the air conditioner is judged to have a blocking fault. In the above two determination conditions, if one is not established, the above diagnosis is performed again after a certain time interval, or other fault diagnosis is performed.

As described above, the blocking fault of the pipeline of the air conditioner can be diagnosed through the cooling capacity of the air conditioner and the operation power of the compressor, and in order to further determine the specific fault, in the embodiment of the present invention, it is considered that the blocking fault occurs at the pipeline or the throttling device, so that the heat generated by the operation of the compressor cannot be taken out of the compressor body by the refrigerant, and therefore, the temperature of each part of the compressor exceeds the threshold value, and therefore, whether the blocking fault occurs in the pipeline or the throttling device can be further determined according to the temperature of the compressor.

The method of the embodiment of the invention also comprises the following steps: acquiring a temperature standard value of the compressor in a current operation mode and at an indoor environment temperature, an outdoor environment temperature and an operation frequency, wherein the temperature standard value comprises an exhaust temperature standard value, a first temperature difference threshold value, a return air temperature standard value, a second temperature difference threshold value, a compressor shell temperature standard value and a third temperature difference threshold value; acquiring the actual exhaust temperature, the actual return air temperature and the actual shell temperature of the compressor; judging that the compressor reaches the overheat condition if any one of the following conditions is satisfied: the difference value of the actual exhaust temperature and the exhaust temperature standard value is larger than the first temperature difference threshold value, the difference value of the actual return air temperature and the return air temperature standard value is larger than the second temperature difference threshold value, and the difference value of the actual shell temperature and the shell temperature standard value is larger than the third temperature difference threshold value.

Taking the refrigeration mode as an example, if the condition for diagnosing the air conditioner to have the blocking fault is satisfied according to the capacity output and the power of the air conditioner, further, the real-time actual exhaust temperature Tp, the actual return air temperature Tsuc and the actual shell temperature Tshe of the compressor of the air conditioner are called, and meanwhile, the pre-stored exhaust temperature standard value Tp _ sto, the return air temperature standard value Tsuc _ sto and the shell temperature standard value Tshe _ sto of the compressor under the current parameters in the refrigeration mode are called, and whether the conditions are satisfied is judged: Tp-Tp _ sto > C1, Tsuc-Tsuc _ sto > C2, Tser _ -Tser _ sto > C3, wherein C1 is a first temperature difference threshold in the cooling mode, C2 is a second temperature difference threshold in the cooling mode, and C3 is a third temperature difference threshold in the cooling mode. If one of the above conditions is satisfied, the blocking fault of the pipeline or the throttling device of the air conditioner is further determined, and if the other condition is not satisfied, the above diagnosis is carried out again at intervals of a plurality of times or other fault diagnoses are carried out.

Taking the heating mode as an example, if the condition for diagnosing the air conditioner to have the blocking fault is satisfied according to the capacity output of the air conditioner and the operation power of the compressor, further, the real-time actual exhaust temperature Tp, the actual return air temperature Tsuc and the actual shell temperature Tshe of the air conditioner are retrieved, and meanwhile, the pre-stored exhaust temperature standard value Tp _ sto, the return air temperature standard value Tsuc _ sto and the shell temperature standard value Tshe _ sto of the compressor are retrieved when the air conditioner stably operates under the condition of the same indoor and outdoor environment temperatures in the heating mode, and whether the conditions are satisfied is judged: Tp-Tp _ sto > C7, Tsuc Tsuc _ sto > C8, Tser _ sto-Tser _ sto > C9, wherein C7 is a first temperature difference threshold value in the heating mode, C8 is a second temperature difference threshold value in the heating mode, and C9 is a third temperature difference threshold value in the heating mode. If one diagnosis condition is satisfied, further determining that a blocking fault occurs in a pipeline or a throttling device of the air conditioner; if the failure is not satisfied, the diagnosis is carried out again after a plurality of time intervals, or other faults are diagnosed.

Further, whether the throttling device of the air conditioner is blocked or not can be further determined according to the temperature of the heat exchanger on the basis of judging that the blocking fault occurs according to the capacity output of the air conditioner and the running power of the compressor and determining that the compressor is overheated according to the temperature of the compressor. In the embodiment of the invention, under the refrigeration mode, acquiring a temperature standard value of a heat exchanger of an air conditioner in the refrigeration mode and at the current indoor environment temperature, outdoor environment temperature and operation frequency, wherein the temperature standard value of the heat exchanger comprises a middle temperature standard value and a first middle temperature difference threshold value of the outdoor heat exchanger, an inlet temperature standard value and a first inlet temperature difference threshold value of the outdoor heat exchanger, and an inlet temperature standard value and a second inlet temperature difference threshold value of the indoor heat exchanger; acquiring the actual middle temperature of the outdoor heat exchanger, the actual inlet temperature of the outdoor heat exchanger and the actual inlet temperature of the indoor heat exchanger; if the following conditions are met, judging that the throttling device of the air conditioner has a blocking fault: the difference value between the actual middle temperature of the outdoor heat exchanger and the middle temperature standard value of the outdoor heat exchanger is larger than a first middle temperature difference threshold value, the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is larger than a first inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is larger than a second inlet temperature difference threshold value.

Specifically, in a refrigeration mode, the actual middle temperature Tcon _ mid of the outdoor heat exchanger, the actual inlet temperature Tcon _ in of the outdoor heat exchanger and the actual inlet temperature Teva _ in of the indoor heat exchanger during real-time stable operation of the air conditioner are taken, and meanwhile, the prestored middle temperature standard value Tcon _ mid _ sto of the outdoor heat exchanger, the prestored inlet temperature standard value Tcon _ in _ sto of the outdoor heat exchanger and the prestored inlet temperature standard value Teva _ in _ sto of the indoor heat exchanger are taken; and judging whether: tcon _ mid-Tcon _ mid _ sto > C4, Tcon _ in-Tcon _ in _ sto > C5, Teva _ in _ sto-Teva _ in > C6, where C4 is the first mid-section temperature differential threshold, C5 is the first inlet temperature differential threshold, and C6 is the second inlet temperature differential threshold. If all the air conditioners are established, diagnosing that the throttling device of the air conditioner in the refrigeration mode has a blockage fault; if one fails, the diagnosis is carried out again after a plurality of time intervals, or other faults are diagnosed.

Further, judging that a blocking fault occurs according to the capacity output of the air conditioner and the running power of the compressor, and determining that the compressor is overheated according to the temperature of the compressor, wherein on the basis, the method of the embodiment of the invention further comprises the following steps: in the heating mode, acquiring temperature standard values of a heat exchanger of the air conditioner in the pre-stored heating mode at the current indoor environment temperature, the current outdoor environment temperature and the current operating frequency, wherein the temperature standard values of the heat exchanger comprise a middle temperature standard value and a second middle temperature difference threshold value of the indoor heat exchanger, an inlet temperature standard value and a third inlet temperature difference threshold value of the indoor heat exchanger, and an inlet temperature standard value and a fourth inlet temperature difference threshold value of the outdoor heat exchanger; acquiring the actual middle temperature of the indoor heat exchanger, the actual inlet temperature of the indoor heat exchanger and the actual inlet temperature of the outdoor heat exchanger; if the following conditions are met, judging that the throttling device of the air conditioner has a blocking fault: the difference value between the actual middle temperature of the indoor heat exchanger and the middle temperature standard value of the indoor heat exchanger is larger than the second middle temperature difference threshold value, the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is larger than the third inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is larger than the fourth inlet temperature difference threshold value.

Specifically, in the heating mode, the actual middle temperature Teva _ mid of the indoor heat exchanger, the actual inlet temperature Teva _ in of the indoor heat exchanger and the actual inlet temperature Tcon _ in of the outdoor heat exchanger during real-time stable operation of the air conditioner are called, and meanwhile, the middle temperature standard value Teva _ mid _ sto of the indoor heat exchanger, the inlet temperature standard value Teva _ in _ sto of the indoor heat exchanger and the inlet temperature standard value Tcon _ in _ sto of the outdoor heat exchanger during stable operation of the air conditioner under the condition of the same indoor and outdoor environment temperatures in the pre-stored heating mode are called; and judging whether: teva _ mid _ -Teva _ mid _ sto > C7, Teva _ in-Teva _ in _ sto > C8, Tcon _ in _ sto-Tcon _ in > C9, where C7 is the second mid-section temperature differential threshold, C8 is the third inlet temperature differential threshold, and C9 is the fourth inlet temperature differential threshold. If all the air conditioners are established, diagnosing that the throttling device of the air conditioner in the heating mode has a blocking fault; if one fails, the diagnosis is carried out again after a plurality of time intervals, or other faults are diagnosed.

Based on the above description, fig. 2 is a flowchart illustrating a method for diagnosing a blocking fault of a throttling device in a cooling mode according to an embodiment of the present invention, which specifically includes:

and S21, starting the throttle blockage fault diagnosis in the cooling mode.

S22, parameters T1, T4 and f are retrieved.

S23, obtaining corresponding pre-stored Tp _ sto, Tsuc _ sto, Tser _ sto, Tcon _ mid _ sto, Tcon _ in _ sto, Teva _ in _ sto, C1, C2, C3, C4, C5 and C6.

S24, capacity output and power detection, and whether: q < Q1, W < W1, if satisfied, go to step S25, otherwise continue the present step with a preset time interval.

And S25, detecting the temperature of the compressor, and judging whether the following conditions are met: Tp-Tp _ sto > C1, Tsuc-Tsuc _ sto > C2, Tser _ -Tser _ sto > C3, and if one is satisfied, the step S26 is entered, otherwise the step is continued with a preset time interval.

And S26, detecting the temperature of the heat exchanger, and judging whether the following conditions are met: tcon _ mid-Tcon _ mid _ sto > C4, Tcon _ in-Tcon _ in _ sto > C5, Teva _ in _ sto-Teva _ in > C6, and if so, the step S27 is entered, otherwise, the step is continued with a preset time interval.

And S27, diagnosing the blockage fault of the throttling device of the air conditioner.

Referring to the heating mode, as shown in fig. 3, a flowchart for diagnosing a blocking fault of the throttling device in the heating mode according to an embodiment of the present invention specifically includes:

and S31, starting to diagnose the blocking fault of the throttling device in the heating mode.

S32, parameters T1, T4 and f are retrieved.

S33, obtaining corresponding pre-stored Tp _ sto, Tsuc _ sto, Tser _ sto, Tcon _ in _ sto, Teva _ mid _ sto, Teva _ in _ sto, C1, C2, C3, C7, C8 and C9.

S34, capacity output and power detection, and whether: q < Q2, W < W2, if satisfied, go to step S35, otherwise continue the present step with a preset time interval.

And S35, detecting the temperature of the compressor, and judging whether the following conditions are met: Tp-Tp _ sto > C7, Tsuc Tsuc _ sto > C8, Tsche _ sto-Tsche _ sto > C9, and if one is satisfied, the step S36 is entered, otherwise, the step is continued with a preset time interval.

And S36, detecting the temperature of the heat exchanger, and judging whether the following conditions are met: teva _ mid _ -Teva _ mid _ sto > C7, Teva _ in-Teva _ in _ sto > C8, Tcon _ in _ sto-Tcon _ in > C9, and if so, the step S37 is entered, otherwise, the step is continued with a preset time interval.

And S37, diagnosing the blockage fault of the throttling device of the air conditioner.

In summary, the method for diagnosing the blocking fault of the air conditioner according to the embodiment of the present invention diagnoses the blocking fault according to the capacity output value and the power value of the air conditioner and the statistical standard value based on the big data, and provides more accurate reliability compared with the local judgment based on the temperature or the pressure; further, the temperatures of different positions of the compressor are detected, when the difference value between the detected temperature and the pre-stored corresponding temperature reaches a temperature difference threshold value, the compressor is judged to be overheated, and the overheating of the refrigerant in the compressor caused by the fact that the refrigerant cannot be removed due to the blocking fault is further determined; and, through refrigerating output and power detection, compressor temperature detection and the temperature detection to the different positions of heat exchanger, can confirm that the throttling arrangement of air conditioner blocks for the refrigerant can not normally circulate, thereby makes refrigerating output reduce and each part of system produce heat accumulation, compares in several temperature sensor diagnosis alone, and this application diagnoses in coordination through more temperature detection points, and is more accurate, and the credibility is higher.

Based on the method of diagnosing a blocking fault of an air conditioner of the above embodiment, an air conditioner of an embodiment of a second aspect of the present invention is described below.

The air conditioner of the embodiment of the second aspect of the present invention includes a memory, a processor and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method for diagnosing the blocking fault of the air conditioner of the embodiment of the first aspect can be implemented.

The following describes a storage medium of an embodiment of the third aspect of the present invention, and a non-transitory computer-readable storage medium of an embodiment of the third aspect of the present invention, on which a computer program is stored, which, when executed by a processor, can implement the method for diagnosing an air conditioner blocking fault of the above embodiment of the first aspect.

A non-transitory computer-readable storage medium according to an embodiment of the present invention provides a basis for implementing the method by storing a computer program that can implement the method of the first aspect.

An apparatus for diagnosing a blocking fault of an air conditioner according to a fourth aspect of the present invention will be described with reference to the accompanying drawings.

Fig. 4 is a block diagram of an apparatus for diagnosing a blocking fault of an air conditioner according to an embodiment of the present invention, and as shown in fig. 4, the apparatus 100 of an embodiment of the present invention includes a first temperature sensor 10, a second temperature sensor 11, a frequency sensor 12, and a controller 13.

The first temperature sensor 10 is used for acquiring indoor environment temperature; the second temperature sensor 11 is used for collecting outdoor environment temperature; the frequency sensor 12 is used for acquiring the operating frequency of a compressor of the air conditioner; and the controller 13 is configured to obtain a pre-stored standard value of the cooling capacity and a pre-stored standard value of the power of the air conditioner in the current operation mode and at the indoor ambient temperature, the outdoor ambient temperature and the operation frequency, obtain an actual capacity output value of the air conditioner and an actual operation power value of the compressor, diagnose that the air conditioner has a blocking fault when the actual capacity output value is smaller than the capacity output standard value and the actual operation power value of the compressor is smaller than the power standard value, and reduce the cooling capacity and the operation power of the compressor because a blocked refrigerant cannot normally circulate in the refrigeration cycle system.

In the embodiment of the invention, under the condition of normal operation of the air conditioner, the operation parameters of the air conditioner during normal temperature operation of the air conditioner in various operation modes and corresponding to various indoor environment temperatures, outdoor environment temperatures and compressor operation frequencies are counted in advance through big data statistics, and the statistical value is processed to obtain the statistical standard value under various conditions, wherein the statistical standard value is used as the reference of the air conditioner under the normal operation condition. The statistical standard value may include a capacity output standard value and a power standard value of the air conditioner, and of course, other related parameter values. The standard value obtained through big data statistics is more reliable and accurate.

According to the device 100 for diagnosing the blockage fault of the air conditioner, the controller 13 is used for judging the blockage diagnosis according to the relation between the capacity output value of the air conditioner and the running power value of the compressor and the corresponding statistical standard value, and compared with a diagnosis method based on temperature or pressure, the device is higher in reliability and more accurate.

As described above, the blocking fault of the air conditioner can be diagnosed by the cooling capacity of the air conditioner and the operation power of the compressor, and in order to further determine the specific fault, it is considered that the heat generated by the operation of the compressor cannot be taken out of the compressor body by the refrigerant due to the blocking fault at the pipeline or the throttling device, and therefore the temperature of each part of the compressor exceeds the threshold value, so that whether the blocking fault occurs in the pipeline or the throttling device can be further determined according to the temperature of the compressor.

In some embodiments of the present invention, as shown in fig. 5, which is a schematic diagram illustrating the installation of sensors in the apparatus for diagnosing a blocking fault of an air conditioner according to an embodiment of the present invention, the apparatus 100 of an embodiment of the present invention further includes a third temperature sensor 14, a fourth temperature sensor 15, and a fifth temperature sensor 16.

Wherein, the third temperature sensor 14 is used for collecting the actual exhaust temperature of the compressor; the fourth temperature sensor 15 is used for acquiring the actual return air temperature of the compressor; the fifth temperature sensor 16 is used for acquiring the actual shell temperature of the compressor; the controller 13 is further configured to obtain a pre-stored temperature standard value of the compressor in the current operation mode and at the indoor ambient temperature, the outdoor ambient temperature, and the operation frequency, wherein the temperature standard value of the compressor includes an exhaust temperature standard value and a first temperature difference threshold value, a return air temperature standard value and a second temperature difference threshold value, a compressor housing temperature standard value, and a third temperature difference threshold value, and when any one of the following conditions is satisfied, it is determined that the compressor reaches an overheat condition: the difference value of the actual exhaust temperature and the exhaust temperature standard value is larger than the first temperature difference threshold value, the difference value of the actual return air temperature and the return air temperature standard value is larger than the second temperature difference threshold value, and the difference value of the actual shell temperature and the shell temperature standard value is larger than the third temperature difference threshold value. When any one of the above diagnostic conditions is satisfied, the compressor is judged to be overheated, and it is considered that the clogging may occur at the throttle device due to the clogging failure occurring at the pipeline, particularly at the throttle device.

In order to more accurately diagnose whether the blockage occurs at the throttling device, the apparatus 100 for diagnosing the blockage fault of the air conditioner according to the embodiment of the present invention further performs diagnosis according to the temperatures of different positions of the heat exchanger of the air conditioner.

In an embodiment of the present invention, for the cooling mode, as shown in fig. 5, the apparatus 100 of an embodiment of the present invention further includes a sixth temperature sensor 17, a seventh temperature sensor 18, and an eighth temperature sensor 19.

The sixth temperature sensor 17 is used for acquiring the actual middle temperature of the outdoor heat exchanger of the air conditioner; the seventh temperature sensor 18 is used for acquiring the actual inlet temperature of the outdoor heat exchanger; the eighth temperature sensor 19 is used to collect an actual inlet temperature of an indoor heat exchanger of the air conditioner.

Under the refrigeration mode, the controller 13 is further configured to obtain a temperature standard value of a heat exchanger of the air conditioner in the pre-stored refrigeration mode and at the current indoor ambient temperature, the outdoor ambient temperature and the operating frequency, wherein the temperature standard value of the heat exchanger includes a middle temperature standard value and a first middle temperature difference threshold value of the outdoor heat exchanger, an inlet temperature standard value and a first inlet temperature difference threshold value of the outdoor heat exchanger, an inlet temperature standard value and a second inlet temperature difference threshold value of the indoor heat exchanger, and when the following conditions are satisfied, it is determined that a blocking fault occurs in a throttling device of the air conditioner: the difference value between the actual middle temperature of the outdoor heat exchanger and the middle temperature standard value of the outdoor heat exchanger is larger than a first middle temperature difference threshold value, the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is larger than a first inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is larger than a second inlet temperature difference threshold value.

For the heating mode, as shown in fig. 5, the apparatus 100 of the embodiment of the present invention further includes a ninth temperature sensor 20, wherein the ninth temperature sensor 20 is used to collect an actual middle temperature of an indoor heat exchanger of an air conditioner.

Under the heating mode, controller 13 is still used for, obtain the heating mode of prestoring and at the indoor ambient temperature, the temperature standard value of the heat exchanger of air conditioner when outdoor ambient temperature and operating frequency, the temperature standard value of heat exchanger includes the middle part temperature standard value and the second middle part difference in temperature threshold value of indoor heat exchanger, the entry temperature standard value and the third entry difference in temperature threshold value of indoor heat exchanger, the entry temperature standard value and the fourth entry difference in temperature threshold value of outdoor heat exchanger, and when satisfying following condition, judge that the throttling arrangement of air conditioner takes place the jam trouble: the difference value between the actual middle temperature of the indoor heat exchanger and the middle temperature standard value of the indoor heat exchanger is larger than the second middle temperature difference threshold value, the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is larger than the third inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is larger than the fourth inlet temperature difference threshold value.

In short, in the embodiment of the present invention, whether the air conditioner has a blocking fault may be diagnosed according to the capacity output value and the power value of the air conditioner and the statistical standard value based on the big data, and when it is determined that the blocking fault has occurred, what the fault is specifically determined according to the temperatures of different positions of the compressor, for example, whether the throttling device is blocked is determined, and when it is determined that the throttling device is blocked, for further accurate determination, the diagnosis is performed according to the temperature of the heat exchanger, and when the temperatures of different positions of the heat exchanger also meet the overheat condition, that is, it is determined that the throttling device is blocked, the diagnosis accuracy and the reliability are improved by setting a plurality of temperature points and cooperatively determining the plurality of temperature points.

In the embodiment of the present invention, the statistical standard value may be stored in the cloud, and when necessary, corresponding data is obtained through data communication, or may be stored in a local memory. As shown in fig. 6, which is a schematic diagram of the apparatus for diagnosing a blocking fault of an air conditioner according to an embodiment of the present invention communicating with a cloud platform, as shown in fig. 5 and 6, the apparatus 100 according to an embodiment of the present invention further includes a communication part 23, the communication part 23 may perform data interaction with the cloud platform through a network, and the communication part 23 is configured to obtain a capacity output standard value and a power standard value of a compressor, a temperature standard value of a compressor, and a temperature standard value of a heat exchanger from the cloud platform 200. Furthermore, the obtained statistical standard values can be stored in the local storage module 131, and the diagnosis of the air conditioner can be realized by each module of the controller 13. For example, the receiving module 132 receives the relevant statistical standard value, the obtaining module 133 obtains a required actual value through a calculation method, for example, the cooling capacity and power of the air conditioner are calculated according to various temperature information, the analysis feedback module 134 may compare and analyze the values to determine whether the diagnosis condition is met, and may feed back the analysis result to the cloud platform 200, and the control module 135 controls the modules. The data on the cloud platform 200 may also be acquired and used by various terminals, such as mobile terminals or computer devices.

In some embodiments of the present invention, as shown in fig. 5, the apparatus 100 of the embodiment of the present invention further includes an alarm 24, and the alarm 24 is used for performing an alarm prompt when the air conditioner is diagnosed to have a blocking fault, for example, a text prompt through a display screen and/or an alarm through audio, so as to inform a user in time.

In summary, the apparatus 100 for diagnosing a blocking fault of an air conditioner according to the embodiment of the present invention diagnoses the blocking fault according to the cooling capacity and power of the air conditioner and a statistical standard value based on big data, and provides more accurate reliability compared with local judgment based on temperature or pressure; further, the temperatures of different positions of the compressor are detected, when the difference value between the detected temperature and the pre-stored corresponding temperature reaches a temperature difference threshold value, the compressor is judged to be overheated, and the overheating of the refrigerant in the compressor caused by the fact that the refrigerant cannot be removed due to the blocking fault is further determined; and, through refrigerating output and power detection, compressor temperature detection and the temperature detection to the different positions of heat exchanger, the throttling arrangement of diagnosis air conditioner blocks for the refrigerant can not normal cycle, thereby makes refrigerating output reduce and each part of system produce heat accumulation, compares in several temperature sensor diagnosis alone, and this application diagnoses in coordination through more temperature detection point, and is more accurate, and the credibility is higher.

Based on the apparatus for diagnosing a blocking fault of an air conditioner according to the above-described embodiment, an air conditioner according to an embodiment of a fifth aspect of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 7, which is a schematic view illustrating a refrigerant circulation system of an air conditioner according to an embodiment of the present invention, an air conditioner 1000 according to an embodiment of the present invention includes a compressor 300, a four-way valve 400, a throttling device 500, an indoor heat exchanger 600, and an outdoor heat exchanger 700, and the apparatus 100 for diagnosing an air conditioner blocking fault (some sensors are shown in the drawing) according to the fourth embodiment, but may include other components, such as an indoor fan 51 and an outdoor fan 31, which are not listed herein.

According to the air conditioner 1000 of the embodiment of the present invention, by adopting the apparatus 100 for diagnosing a blocking fault of an air conditioner of the fourth aspect of the embodiment, the blocking fault of the air conditioner can be diagnosed more accurately.

It should be noted that in the description of this specification, any process or method description in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A method of diagnosing an air conditioner blocking fault, the method comprising:

collecting the indoor environment temperature, the outdoor environment temperature and the running frequency of an air conditioner compressor at the current moment;

acquiring a pre-stored capacity output standard value and a pre-stored power standard value of the air conditioner in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency;

acquiring an actual capacity output value of the air conditioner and an actual running power value of a compressor;

diagnosing a blocking fault of the air conditioner if the actual capacity output value is less than the capacity output criterion value and the actual operation power value is less than the power criterion value,

and if one of the determination conditions that the actual capacity output value is smaller than the capacity output standard value and the actual operation power value is smaller than the power standard value is not satisfied, diagnosing that the air conditioner is not blocked.

2. The method of diagnosing an air conditioner blocking fault as recited in claim 1, further comprising:

acquiring prestored temperature standard values of the compressor in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency, wherein the temperature standard values comprise an exhaust temperature standard value and a first temperature difference threshold value, a return air temperature standard value and a second temperature difference threshold value, and a compressor shell temperature standard value and a third temperature difference threshold value;

acquiring the actual exhaust temperature, the actual return air temperature and the actual shell temperature of the compressor;

determining that the compressor has reached an overheat condition if any one of the following conditions is satisfied: the difference value between the actual exhaust temperature and the exhaust temperature standard value is greater than the first temperature difference threshold value, the difference value between the actual return air temperature and the return air temperature standard value is greater than the second temperature difference threshold value, and the difference value between the actual shell temperature and the shell temperature standard value is greater than the third temperature difference threshold value.

3. The method of diagnosing an air conditioner blocking fault as recited in claim 2, wherein in a cooling mode, the method further comprises:

acquiring temperature standard values of a heat exchanger of the air conditioner in the pre-stored refrigeration mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency, wherein the temperature standard values of the heat exchanger comprise a middle temperature standard value and a first middle temperature difference threshold value of the outdoor heat exchanger, an inlet temperature standard value and a first inlet temperature difference threshold value of the outdoor heat exchanger, and an inlet temperature standard value and a second inlet temperature difference threshold value of the indoor heat exchanger;

acquiring the actual middle temperature of the outdoor heat exchanger, the actual inlet temperature of the outdoor heat exchanger and the actual inlet temperature of the indoor heat exchanger;

if the following conditions are met, judging that the throttling device of the air conditioner has a blocking fault: the difference value between the actual middle temperature of the outdoor heat exchanger and the middle temperature standard value of the outdoor heat exchanger is greater than the first middle temperature difference threshold value, the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the first inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the second inlet temperature difference threshold value.

4. The method of diagnosing an air conditioner blocking fault as recited in claim 2, wherein in the heating mode, the method further comprises:

acquiring temperature standard values of a heat exchanger of the air conditioner in the indoor environment temperature, the outdoor environment temperature and the operation frequency in a prestored heating mode, wherein the temperature standard values of the heat exchanger comprise a middle temperature standard value and a second middle temperature difference threshold value of the indoor heat exchanger, an inlet temperature standard value and a third inlet temperature difference threshold value of the indoor heat exchanger, and an inlet temperature standard value and a fourth inlet temperature difference threshold value of the outdoor heat exchanger;

acquiring the actual middle temperature of the indoor heat exchanger, the actual inlet temperature of the indoor heat exchanger and the actual inlet temperature of the outdoor heat exchanger;

if the following conditions are met, judging that the throttling device of the air conditioner has a blocking fault: the difference value between the actual middle temperature of the indoor heat exchanger and the middle temperature standard value of the indoor heat exchanger is greater than the second middle temperature difference threshold value, the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the third inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the fourth inlet temperature difference threshold value.

5. An air conditioner comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method for diagnosing a blockage failure of an air conditioner according to any one of claims 1 to 4.

6. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the method of diagnosing an air conditioner blocking fault as recited in any one of claims 1-4.

7. An apparatus for diagnosing an air conditioner blocking fault, the apparatus comprising:

the first temperature sensor is used for collecting the indoor environment temperature;

the second temperature sensor is used for acquiring the outdoor environment temperature;

the frequency sensor is used for acquiring the running frequency of a compressor of the air conditioner;

and the controller is used for acquiring a pre-stored capacity output standard value and a pre-stored power standard value of the air conditioner in the current operation mode and at the indoor environment temperature, the outdoor environment temperature and the operation frequency, acquiring an actual capacity output value of the air conditioner and an actual operation power value of the compressor, diagnosing that the air conditioner has a blocking fault when the actual capacity output value is smaller than the capacity output standard value and the actual operation power value is smaller than the power standard value, and diagnosing that the air conditioner does not have the blocking fault when one judgment condition of the actual capacity output value smaller than the capacity output standard value and the actual operation power value smaller than the power standard value is not met.

8. The apparatus for diagnosing a blocking fault of an air conditioner according to claim 7, further comprising:

a third temperature sensor for acquiring an actual discharge temperature of the compressor;

the fourth temperature sensor is used for acquiring the actual return air temperature of the compressor;

the fifth temperature sensor is used for acquiring the actual shell temperature of the compressor;

the controller is also used for, obtain prestoring in current operating mode and be in indoor ambient temperature outdoor ambient temperature with during the operating frequency the temperature standard value of compressor, wherein, the temperature standard value of compressor includes exhaust temperature standard value and first difference in temperature threshold value, return-air temperature standard value and second difference in temperature threshold value, compressor housing temperature standard value and third difference in temperature threshold value to when satisfying any one in following condition, judge the compressor reaches overheated condition: the difference value between the actual exhaust temperature and the exhaust temperature standard value is greater than the first temperature difference threshold value, the difference value between the actual return air temperature and the return air temperature standard value is greater than the second temperature difference threshold value, and the difference value between the actual shell temperature and the shell temperature standard value is greater than the third temperature difference threshold value.

9. The apparatus for diagnosing an air conditioner blocking fault as recited in claim 8, further comprising:

the sixth temperature sensor is used for acquiring the actual middle temperature of the outdoor heat exchanger of the air conditioner;

the seventh temperature sensor is used for acquiring the actual inlet temperature of the outdoor heat exchanger;

the eighth temperature sensor is used for acquiring the actual inlet temperature of the indoor heat exchanger of the air conditioner;

in the cooling mode, the controller is further configured to obtain a pre-stored value in the cooling mode, the temperature of the indoor environment is in the cooling mode, the temperature of the outdoor environment is in the operating frequency, and the temperature standard value of the heat exchanger of the air conditioner is a temperature standard value of the heat exchanger, wherein the temperature standard value of the heat exchanger includes a middle temperature standard value of the outdoor heat exchanger and a first middle temperature difference threshold value, an inlet temperature standard value of the outdoor heat exchanger and a first inlet temperature difference threshold value, and an inlet temperature standard value of the indoor heat exchanger and a second inlet temperature difference threshold value, and when the following conditions are met, the blocking fault of the throttling device of the air conditioner is judged: the difference value between the actual middle temperature of the outdoor heat exchanger and the middle temperature standard value of the outdoor heat exchanger is greater than the first middle temperature difference threshold value, the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the first inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the second inlet temperature difference threshold value.

10. The apparatus for diagnosing an air conditioner blocking fault as recited in claim 8, further comprising:

the seventh temperature sensor is used for acquiring the actual inlet temperature of the outdoor heat exchanger of the air conditioner;

the ninth temperature sensor is used for acquiring the actual middle temperature of the indoor heat exchanger;

under the heating mode, the controller is still used for, acquire prestoring heating the mode and be in indoor ambient temperature outdoor ambient temperature with during the operating frequency the temperature standard value of the heat exchanger of air conditioner, wherein, the temperature standard value of heat exchanger includes indoor heat exchanger's middle part temperature standard value and second middle part difference in temperature threshold value indoor heat exchanger's entry temperature standard value and third entry difference in temperature threshold value outdoor heat exchanger's entry temperature standard value and fourth entry difference in temperature threshold value to when satisfying following condition, judge the throttling arrangement of air conditioner takes place the jam trouble: the difference value between the actual middle temperature of the indoor heat exchanger and the middle temperature standard value of the indoor heat exchanger is greater than the second middle temperature difference threshold value, the difference value between the actual inlet temperature of the indoor heat exchanger and the inlet temperature standard value of the indoor heat exchanger is greater than the third inlet temperature difference threshold value, and the difference value between the actual inlet temperature of the outdoor heat exchanger and the inlet temperature standard value of the outdoor heat exchanger is greater than the fourth inlet temperature difference threshold value.

11. The apparatus for diagnosing a blocking fault of an air conditioner according to claim 9 or 10, further comprising a communication part for acquiring a capacity output standard value and a power standard value of the air conditioner, a temperature standard value of the compressor and a temperature standard value of the heat exchanger from a cloud platform.

12. The apparatus for diagnosing a blocking fault of an air conditioner according to any one of claims 7 to 10, further comprising an alarm for giving an alarm prompt when the blocking fault of the air conditioner is diagnosed.

13. An air conditioner, characterized in that the air conditioner comprises a compressor, a four-way valve, a throttling device, an indoor heat exchanger and an outdoor heat exchanger, and the device for diagnosing the blockage failure of the air conditioner as recited in any one of claims 7 to 12.