CN114413408A

CN114413408A - Air conditioner and fault identification method, identification device and readable storage medium thereof

Info

Publication number: CN114413408A
Application number: CN202011173401.9A
Authority: CN
Inventors: 刘华瑞; 戚文端; 刘燕飞
Original assignee: Guangdong Meidi Precision Die Technology Co ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Guangdong Meidi Precision Die Technology Co ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-04-29

Abstract

The invention discloses an air conditioner fault identification method, which comprises the following steps: in the starting stage of the compressor, executing the detection operation of the running state parameters of the air conditioner to obtain first detection data; if the first detection data meet a first judgment condition corresponding to a first type fault of the refrigerating system, determining that the first type fault exists in the air conditioner; if the first detection data do not meet the first judgment condition, executing detection operation on the running state parameters to obtain second detection data; and if the second detection data meet a second judgment condition corresponding to a second type of fault of the refrigerating system, determining that the second type of fault exists in the air conditioner. The invention also discloses an air conditioner fault recognition device, an air conditioner and a readable storage medium. The invention aims to accurately distinguish the fault types of the refrigerating system, so that the air conditioner can timely and accurately repair the faults and ensure the realization of the normal functions of the air conditioner.

Description

Air conditioner and fault identification method, identification device and readable storage medium thereof

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner fault identification method, an air conditioner fault identification device, an air conditioner and a readable storage medium.

Background

The air conditioning system generally comprises a compressor, an outdoor heat exchanger, a throttling device, an indoor heat exchanger and other components, wherein all the components are communicated through pipelines, a refrigerant is filled in the pipelines to form a refrigerant circulation loop, and the heat exchange function of the air conditioning system is realized through the circulating flow of the refrigerant in all the components. Wherein, the air conditioner is in installation, removal or the in-process of using, and the condition such as the hourglass of valve body is opened, the damage of pipeline, the buckling of pipeline in the pipeline can lead to refrigerating system to appear refrigerant leakage, trouble such as jam, can lead to the air conditioner performance to descend, can damage the compressor when serious and even lead to the air conditioner to appear the incident, and based on this, the air conditioner generally can have the detection function of refrigerant trouble.

However, the refrigerant fault detection function of the air conditioner can only identify that the refrigeration system has a fault, but cannot distinguish the fault type of the refrigeration system, thereby affecting the timeliness and accuracy of fault repair of the air conditioner.

Disclosure of Invention

The invention mainly aims to provide an air conditioner fault identification method, which aims to accurately distinguish the fault type of a refrigerating system, so that the air conditioner can timely and accurately repair the fault and ensure the realization of the normal function of the air conditioner.

In order to achieve the above object, the present invention provides an air conditioner fault identification method, including the steps of:

in the starting stage of the compressor, executing the detection operation of the running state parameters of the air conditioner to obtain first detection data;

if the first detection data meet a first judgment condition corresponding to a first type fault of the refrigerating system, determining that the first type fault exists in the air conditioner;

if the first detection data do not meet the first judgment condition, executing detection operation on the running state parameters to obtain second detection data;

and if the second detection data meet a second determination condition corresponding to a second type of fault of the refrigeration system, determining that the second type of fault exists in the air conditioner.

Optionally, the first type of fault includes a blocking fault of the refrigeration system, the operating state parameter includes a first type of parameter, the first type of parameter is an exhaust temperature of the compressor, the first detection data includes a first exhaust temperature detected when the compressor operates for more than a first set time after being started, and after the step of obtaining the first detection data, the method further includes:

determining that the first detection data satisfies the first determination condition if the first exhaust temperature satisfies a first sub-condition;

determining that the first detection data does not satisfy the first determination condition if the first exhaust temperature does not satisfy the first sub-condition;

wherein the first sub-condition is that the first exhaust temperature is less than or equal to a first set temperature.

Optionally, the operation state parameters further include a second type of parameter, where the second type of parameter includes a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of the indoor heat exchanger, a variation parameter of a coil temperature of the indoor heat exchanger, a frequency of the compressor, and/or a current of the compressor, and after the step of obtaining the first detection data, the method further includes:

when the first exhaust temperature meets the first sub-condition and the data corresponding to the second type of parameter in the first detection data meets the corresponding requirement in a second sub-condition, determining that the first detection data meets the first judgment condition;

when the first exhaust temperature does not meet the first sub-condition, or when the data corresponding to the second type of parameter in the first detection data does not meet the corresponding requirement in the second sub-condition, determining that the first detection data does not meet the first determination condition;

the data corresponding to the second type of parameter in the first detection data comprises a first variation parameter of the indoor temperature, a second variation parameter of the coil pipe temperature, a first deviation parameter between the indoor temperature and the coil pipe temperature, a first current and/or a first frequency, wherein the first current is a compressor current detected when the running duration of the compressor reaches more than a first set duration after the compressor is started, and the first frequency is an operating frequency detected when the running duration of the compressor reaches more than the first set duration after the compressor is started;

the second sub-condition comprises: the first variation parameter is less than or equal to a first threshold, the second variation parameter is less than or equal to a second threshold, and the first deviation parameter is less than or equal to a third threshold; the first current is less than or equal to a first set current, and/or the first frequency is greater than or equal to a first set frequency.

Optionally, the air conditioner fault identification method further includes:

acquiring the outdoor environment temperature;

acquiring the first set temperature and/or the first set current according to the outdoor environment temperature;

the first set temperature is increased along with the increase of the outdoor environment temperature, and the first set current is increased along with the increase of the outdoor environment temperature.

Optionally, the second type of fault includes a leakage fault of the refrigeration system, the second detection data includes a second discharge temperature detected when the compressor is operated for a second set time period or longer after being started, the second set time period is longer than the first set time period, the detecting operation of the operating state parameter is executed, and after the step of obtaining the second detection data, the method further includes:

if the second exhaust temperature meets a third sub-condition, determining that the second detection data meets the second determination condition;

if the second exhaust temperature does not meet the third sub-condition, determining that the second detection data does not meet the second determination condition;

wherein the third sub-condition is that the second exhaust temperature is greater than a second set temperature, which is greater than or equal to the first set temperature.

Optionally, the operating state parameters further include a second type of parameter, where the second type of parameter includes a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of the indoor heat exchanger, a variation parameter of a coil temperature of the indoor heat exchanger, a frequency of the compressor, and/or a current of the compressor, and after the step of performing the detection operation on the operating state parameter to obtain the second detection data, the method further includes:

when the second exhaust temperature meets the third sub-condition and data corresponding to the second type of parameter in the second detection data meets a corresponding requirement in a fourth sub-condition, determining that the second detection data meets the second determination condition;

when the second exhaust temperature does not meet the third sub-condition, or when the data corresponding to the second type of parameter in the second detection data does not meet the corresponding requirement in the fourth sub-condition, determining that the second detection data does not meet the second determination condition;

the data corresponding to the second type of parameter in the second detection data includes a third variation parameter of the indoor temperature, a fourth variation parameter of the coil pipe temperature, a second deviation parameter between the indoor temperature and the coil pipe temperature, a second current and/or a second frequency, the second current is the compressor current detected when the running time length of the compressor after starting reaches more than a second set time length, and the second frequency is the running frequency detected when the running time length of the compressor after starting reaches more than the second set time length;

the fourth sub-condition comprises: the third variation parameter is less than or equal to a fourth threshold, the fourth variation parameter is less than or equal to a fifth threshold, the second deviation parameter is less than or equal to a sixth threshold, the second current is less than or equal to a second set current, and/or the second frequency is greater than or equal to a second set frequency.

Optionally, the air conditioner fault identification method further includes:

acquiring the outdoor environment temperature;

acquiring the second set temperature and/or the second set current according to the outdoor environment temperature;

the second set temperature is increased along with the increase of the outdoor environment temperature, and the second set current is increased along with the increase of the outdoor environment temperature.

Optionally, the step of defining the target detection data as first detection data or second detection data, defining the type of the target fault as a first type fault or a second type fault correspondingly determined by the target detection data, and performing a detection operation on an operation state parameter of the air conditioner to obtain the target detection data includes:

executing detection operation on the running state parameters of the air conditioner to obtain first sub-detection data;

controlling the indoor fan to reduce the rotating speed for operation, or adjusting the operating rotating speed of the outdoor fan according to the current operating mode of the air conditioner and the target fault type;

executing the detection operation of the running state parameters of the air conditioner to obtain second sub-detection data;

and taking the first sub-detection data and the second sub-detection data as the target detection data.

Optionally, after the step of performing the operation of detecting the operating state parameter of the air conditioner to obtain the target detection data, the method further includes:

judging whether the first sub-detection data and the second sub-detection data both meet a target judgment condition corresponding to the target detection data; the target judgment condition is a first judgment condition corresponding to the first detection data or a second judgment condition corresponding to the second detection data;

if yes, determining that the target detection data meets the target judgment condition;

if not, determining that the target detection data does not meet the target judgment condition.

Optionally, the step of adjusting the operating speed of the outdoor fan according to the current operating mode of the air conditioner and the target fault type includes:

when the operation mode is a refrigeration mode and the target fault type is a first type fault, controlling the outdoor fan to reduce the rotating speed for operation;

when the operation mode is a refrigeration mode and the target fault type is a second type of fault, controlling the outdoor fan to increase the rotating speed to operate;

when the operation mode is a heating mode and the target fault type is a first type fault, controlling the outdoor fan to increase the rotating speed to operate;

and when the operation mode is a heating mode and the target fault type is a second type of fault, controlling the outdoor fan to reduce the rotating speed to operate.

Optionally, the operation state parameters include an exhaust temperature of the compressor, a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of the indoor heat exchanger, a variation parameter of a coil temperature of the indoor heat exchanger, a frequency of the compressor, and a current of the compressor, the target sub-detection data is defined as first sub-detection data or second sub-detection data, the detection operation on the operation state parameters of the air conditioner is performed, and the step of obtaining the target sub-detection data includes:

in a time period between a first moment and a second moment, detecting indoor temperature and coil temperature of an indoor heat exchanger to obtain a first indoor temperature and a first coil temperature;

in a time period between the third time and the fourth time, detecting the indoor temperature and the coil temperature of the indoor heat exchanger to obtain a second indoor temperature and a second coil temperature; wherein the third time is greater than or equal to the second time;

detecting the frequency of the compressor, the current of the compressor and the exhaust temperature of the compressor at the fourth moment to obtain a sub-frequency, a sub-current and a sub-exhaust temperature;

determining first data, second data and third data in the target sub-detection data according to the first indoor temperature, the first coil temperature, the second indoor temperature and the second coil temperature;

taking the sub-frequency, the sub-current and the sub-discharge temperature as data corresponding to the frequency of the compressor, the current of the compressor and the discharge temperature of the compressor in the target sub-detection data respectively;

the first data are data corresponding to the variation parameters of the indoor temperature, the second data are data corresponding to the variation parameters of the coil temperature of the indoor heat exchanger, and the third data are data corresponding to the temperature deviation between the indoor temperature and the coil temperature of the indoor heat exchanger.

Optionally, the step of determining first data, second data and third data in the target sub-detection data according to the first indoor temperature, the first coil temperature, the second indoor temperature and the second coil temperature includes:

determining a first indoor temperature difference between the first indoor temperature and the second indoor temperature, determining a first coil temperature difference between the first coil temperature and the second coil temperature, determining a first temperature deviation between the second indoor temperature and the second coil temperature;

and taking the first indoor temperature difference as the first data, the first coil temperature difference as the second data, and the first temperature deviation as the third data.

In addition, in order to achieve the above object, the present application also provides an air conditioning fault recognition apparatus including: the air conditioner fault identification method comprises a memory, a processor and an air conditioner fault identification program which is stored on the memory and can run on the processor, wherein the air conditioner fault identification program realizes the steps of the air conditioner fault identification method according to any one of the above items when being executed by the processor.

In addition, in order to achieve the above object, the present application also proposes an air conditioner including the air conditioner fault recognition apparatus as described above.

Further, in order to achieve the above object, the present application also proposes a readable storage medium having stored thereon an air conditioning fault recognition program that, when executed by a processor, implements the steps of the air conditioning fault recognition method as recited in any one of the above.

The invention provides an air conditioner fault identification method, which comprises the steps of judging whether a first type of fault exists in a refrigeration system or not based on first detection data corresponding to an air conditioner running state parameter in a starting stage of a compressor, determining that the type of the fault existing in the refrigeration system belongs to the first type of fault when the first detection data meet a first judgment condition, further detecting the running state parameter to obtain second detection data if the first detection data meet the first judgment condition, determining that the type of the fault existing in the refrigeration system belongs to the second type of fault when the second detection data meet a second judgment condition, wherein the faults of different types of refrigeration systems are different in stability time and different in judgment condition after the compressor is started, and the faults of the different types of refrigeration systems are identified based on the running state parameter in sequence in the starting stage of the compressor, so that the different types of the fault occurring in the refrigeration system can be quickly and accurately distinguished, the air conditioner can timely and accurately repair the fault based on the identified fault type, and the realization of the normal function of the air conditioner is ensured.

Drawings

Fig. 1 is a schematic diagram of a hardware structure involved in the operation of an embodiment of the air conditioner fault identification device of the present invention;

FIG. 2 is a schematic flow chart illustrating an embodiment of an air conditioner fault identification method according to the present invention;

FIG. 3 is a schematic flow chart illustrating an air conditioner fault identification method according to another embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating an air conditioner fault identification method according to another embodiment of the present invention;

FIG. 5 is a schematic flow chart illustrating a method for identifying air conditioner faults according to still another embodiment of the present invention;

FIG. 6 is a schematic flow chart illustrating an air conditioner fault identification method according to yet another embodiment of the present invention;

fig. 7 is a schematic diagram of a detailed flow of step S11 or step S13 in fig. 6.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The main solution of the embodiment of the invention is as follows: in the starting stage of the compressor, executing the detection operation of the running state parameters of the air conditioner to obtain first detection data; if the first detection data meet a first judgment condition corresponding to a first type fault of the refrigerating system, determining that the first type fault exists in the air conditioner; if the first detection data do not meet the first judgment condition, executing detection operation on the running state parameters to obtain second detection data; and if the second detection data meet a second determination condition corresponding to a second type of fault of the refrigeration system, determining that the second type of fault exists in the air conditioner.

In the prior art, the refrigerant fault detection function of the air conditioner can only identify that the refrigeration system has faults, but cannot distinguish the fault type of the refrigeration system, so that the timeliness and the accuracy of fault repair of the air conditioner are influenced.

The invention provides the solution, and aims to accurately distinguish the fault types of the refrigerating system, so that the air conditioner can timely and accurately repair the faults and ensure the realization of the normal functions of the air conditioner.

The embodiment of the invention provides an air conditioner which can be a cabinet air conditioner, a wall-mounted air conditioner, a window air conditioner, a mobile air conditioner and the like.

In the embodiment of the invention, the air conditioner comprises a refrigerant pipeline, a first heat exchanger, a compressor, a second heat exchanger, a throttling device and the like. The refrigerant pipeline is sequentially connected with the compressor, the first heat exchanger, the throttling device, the second heat exchanger and the compressor to form a refrigerating system of the air conditioner. The refrigerant flowing out of the compressor can flow through the first heat exchanger, the throttling device and the second heat exchanger in sequence and then flows back to the compressor, and therefore heating or refrigerating of the air conditioner is achieved.

Furthermore, the air conditioner also comprises a plurality of detection modules for detecting the running state parameters of the air conditioner. Specifically, the detection module may include a plurality of temperature sensors 1, which may be disposed at positions such as an exhaust port of the compressor, a coil of the indoor heat exchanger, and a return air inlet of the indoor unit, so as to detect an exhaust temperature of the compressor, an indoor ambient temperature, a coil temperature of the indoor heat exchanger, and the like. In addition, the detection module may further include a frequency detection module 2 to detect an operating frequency of the compressor. In addition, the detection module may further include a current detection module 3 to detect an operation current of the compressor.

The embodiment of the invention provides an air conditioner fault recognition device which can be applied to control of the air conditioner. The air conditioner fault recognition device can be arranged outside the air conditioner independently of the air conditioner (such as a mobile phone, a television, a purifier, a computer and the like) or can be arranged inside the air conditioner.

In an embodiment of the present invention, referring to fig. 1, an air conditioner fault recognition apparatus includes: a processor 1001 (e.g., CPU), memory 1002, etc. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.

The processor 1001 may be connected to the memory 1002 to read data from the memory 1002 or store data during operation in the memory 1002. In addition, the temperature sensor 1, the frequency detection module 2, and the current detection module 3 in the air conditioner may also be connected to the processor 1001, and the processor 1001 may acquire data collected by the detection module.

Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

As shown in fig. 1, an air conditioner fault recognition program may be included in the memory 1002, which is a readable storage medium. In the apparatus shown in fig. 1, the processor 1001 may be configured to call an air conditioner fault recognition program stored in the memory 1002 and perform operations of the steps related to the air conditioner fault recognition method in the following embodiments.

The embodiment of the invention also provides an air conditioner fault identification method.

Referring to fig. 2, an embodiment of an air conditioner fault identification method according to the present application is provided. In this embodiment, the air conditioner fault identification method includes:

step S10, in the starting stage of the compressor, executing the detection operation of the running state parameters of the air conditioner to obtain first detection data;

the operating state parameter herein specifically refers to a state parameter related to a refrigerant in an operating process of the air conditioner, and may include a temperature characteristic parameter related to a heat exchange process of the air conditioner and/or an operating characteristic parameter of the compressor, and the like. Specifically, the operation state parameter includes one or more of a discharge temperature of the compressor, an indoor temperature, a coil temperature of the indoor heat exchanger, a frequency of the compressor, a current of the compressor, an operation duration of the compressor, a variation parameter of the indoor temperature, a temperature deviation of the coil temperature of the indoor heat exchanger, and the like.

Starting timing when a compressor is started, executing detection operation on an operation state parameter in a set time period, and taking data obtained by the detection of the operation as first detection data; step S20 is executed a plurality of times within the period of time or at the end of the period of time, and a determination is made based on whether the first detection data obtained by the current detection satisfies the following first determination condition.

Step S20, judging whether the first detection data meet a first judgment condition corresponding to a first type of fault of the refrigeration system;

if the first detection data meets a first judgment condition corresponding to the first type of fault of the refrigeration system, executing step S30; if the first detection data does not satisfy the first determination condition, step S40 is executed.

The first determination condition specifically refers to a parameter range that the operating state parameters of the air conditioner in the starting stage of the compressor need to meet when the first type of fault occurs in the refrigeration system. The first determination condition may be set in advance by a large amount of data analysis.

If the first detection data meet a first judgment condition corresponding to a first type fault of the refrigeration system, the refrigeration system can be considered to have the first type fault; if the first detection data does not meet the first judgment condition corresponding to the first type of fault of the refrigeration system, the refrigeration system is considered to have no first type of fault.

In this embodiment, the first type of fault specifically refers to a blockage fault of the refrigeration system, that is, a fault that a refrigerant in the refrigeration system cannot flow. In other embodiments, the first type of fault may also be set as a fault for other types of refrigeration systems depending on the actual situation.

Step S30, determining that the air conditioner has the first type of fault;

step S40, executing the detection operation of the running state parameter to obtain second detection data;

step S40 is performed immediately after it is determined that the air conditioner does not have the first type failure, or when the duration of the continuous operation reaches the set duration after the compressor is started.

Starting timing when the air conditioner is determined to have no first-class fault, or starting timing when the continuous operation time length reaches the set time length after the compressor is started, executing the detection operation on the operation state parameters in the set time period, and taking the data obtained by the operation detection as second detection data; step S50 is executed a plurality of times within the period of time or at the end of the period of time, and a determination is made based on whether the second detection data obtained by the current detection satisfies the following second determination condition.

It should be noted that the detection processes of the first detection data and the second detection data can be set to be the same or different according to the actual requirement of the type of fault of the refrigeration system to be identified.

Step S50, judging whether the second detection data meet a second judgment condition corresponding to a second type of fault of the refrigeration system;

if the second detection data meets the second determination condition corresponding to the second type of fault of the refrigeration system, step S60 is executed. If the second detection data does not satisfy the second determination condition corresponding to the second type of fault of the refrigeration system, step S70 may be executed, and whether there are other fault types may also be identified according to actual requirements.

The second determination condition specifically refers to a parameter range that needs to be satisfied by the operating state parameters of the air conditioner in the starting stage of the compressor when the second type of fault occurs in the refrigeration system. The second determination condition may be set in advance through a large amount of data analysis. It should be noted that the parameter ranges in the first determination condition and the second determination condition may be set to be the same, completely different or partially different according to the actual failure characteristics of the first type of failure and the second type of failure.

If the second detection data meet a second determination condition corresponding to a second type of fault of the refrigeration system, the refrigeration system can be considered to have the second type of fault; and if the second detection data does not meet the second judgment condition corresponding to the second type of fault of the refrigeration system, the refrigeration system is considered to have no second type of fault.

In this embodiment, the second type of fault specifically refers to a leakage fault of the refrigeration system, that is, a fault in which an actual refrigerant quantity in the refrigeration system is smaller than a refrigerant quantity required by a refrigerant cycle. In other embodiments, the second type of fault may also be set as a fault for other types of refrigeration systems depending on the actual situation.

And step S60, determining that the air conditioner has the second type of fault.

And step S70, determining that the refrigeration system is normal.

The air conditioner fault identification method provided by the embodiment of the invention comprises the steps of judging whether a first type of fault exists in a refrigeration system or not on the basis of first detection data corresponding to an air conditioner running state parameter in a starting stage of a compressor, determining that the fault type of the refrigeration system belongs to the first type of fault when the first detection data meets a first judgment condition, and further detecting the running state parameter to obtain second detection data when the first detection data meets a second judgment condition, determining that the fault type of the refrigeration system belongs to the second type of fault when the second detection data meets the second judgment condition, wherein in the method, the faults of different types of refrigeration systems are different in stability time, different judgment conditions and the like after the compressor is started, and the faults of the different types of refrigeration systems are identified on the basis of the running state parameter in the starting stage of the compressor, so that the different fault types of the refrigeration system can be distinguished rapidly and accurately, the air conditioner can timely and accurately repair the fault based on the identified fault type, and the realization of the normal function of the air conditioner is ensured.

Furthermore, after the fault type of the refrigerating system in the air conditioner is identified, corresponding fault prompt information can be output according to the actual fault type, different fault prompt information is adopted correspondingly for different fault types, and therefore a user or a maintenance worker can know that the current refrigerating system of the air conditioner has a fault and know the specific fault type based on the fault prompt information.

Further, based on the above embodiment, another embodiment of the air conditioner fault identification method is provided. In the present embodiment, the first type of fault is specifically a refrigerant system blockage fault, and the second type of fault is specifically a refrigerant system leakage fault. The operation state parameters comprise first type parameters, the first type parameters are exhaust temperature of the compressor, based on the first type parameters, the first detection data specifically comprise detection data corresponding to the first type parameters, and specifically, the data corresponding to the first type parameters in the first detection data are first exhaust temperature detected when the compressor is started and operates for more than a first set time. The first set time period is counted from the start of the compressor. The specific time length of the first set time length can be set according to the actual time length required by the refrigerant in the refrigeration system to reach the normal flowing state.

In addition, referring to fig. 3, after step S10, i.e., step S20 includes:

step S21, determining whether the first exhaust temperature satisfies a first sub-condition;

if the first exhaust temperature meets the first sub-condition, executing step S22; if the first exhaust temperature does not meet the first sub-condition, step S23 is executed.

The first set temperature specifically refers to a minimum temperature that the discharge temperature of the compressor needs to reach when the refrigerant normally flows. If the first exhaust temperature is less than or equal to the first set temperature, the refrigerant in the refrigerating system is difficult to flow, and the air conditioner has a first type of fault; if the first exhaust temperature is higher than the first set temperature, the normal flow of the refrigerant in the refrigerating system can be indicated, and the air conditioner has no first-class fault.

Step S22 of determining that the first detection data satisfies the first determination condition;

if the first detection data satisfies the first determination condition, step S30 may be executed to determine that the air conditioner has a blockage fault in the refrigeration system.

Step S23, determining that the first detection data does not satisfy the first determination condition.

If the first detection data does not satisfy the first determination condition, it may be determined that the air conditioner does not have the refrigeration system blockage fault, and step S40 may be performed.

In the present embodiment, through steps S21 to S23, since the discharge temperature is lower than the normal state when the refrigerant is unable to flow, it is possible to accurately determine whether the first type of fault exists in the air conditioner based on the comparison result between the discharge temperature of the compressor and the first set temperature when the compressor is started for a certain period of time.

Further, in this embodiment, on the basis that the operating state parameter includes the discharge temperature of the compressor, the second detection data specifically includes detection data corresponding to the first type of parameter, specifically, data corresponding to the first type of parameter in the second detection data is a second discharge temperature detected when the operation of the compressor reaches a second set duration after the start, where the second set duration is greater than the first set duration. And the second set time period is counted from the start of the compressor. The specific time length of the second set time length can be set according to the actual time length required by the state that the refrigerant circulation in the refrigeration system can achieve normal heat exchange. Referring to fig. 3, the step S50, which is subsequent to the step S40, includes:

step S51, determining whether the second exhaust temperature meets a third sub-condition;

if the second exhaust temperature meets the third sub-condition, executing step S52; if the second exhaust temperature does not meet the third sub-condition, step S53 is executed.

The second set temperature specifically refers to a maximum temperature allowed to be reached by the discharge temperature of the compressor when the refrigerant meets the amount of the refrigerant required by the circulating heat exchange. If the second exhaust temperature is greater than or equal to the second set temperature, the refrigerant in the refrigerating system is too little to exchange heat normally, and the air conditioner has a second type of fault; if the second exhaust temperature is lower than the second set temperature, the refrigerant quantity in the refrigerating system can meet the normal circulating heat exchange requirement, and the air conditioner has no second type of faults.

Step S52, determining that the second detection data satisfies the second determination condition;

if the second detection data satisfies the second determination condition, step S60 may be executed to determine that the air conditioner has a leakage fault of the refrigeration system.

Step S53, determining that the second detection data does not satisfy the second determination condition.

If the second detection data does not satisfy the second determination condition, step S70 may be executed to determine that the refrigeration system of the air conditioner is in a normal state.

In this embodiment, through steps S51 to S53, since the exhaust temperature is higher than the normal state due to insufficient refrigerant quantity, and the time taken for the system to reach the state of normal heat exchange is longer than the state in which the refrigerant can flow normally under sufficient refrigerant quantity, the result of comparing the exhaust temperature of the compressor with the second set temperature when the compressor is started for a period of time longer than the first set time can realize accurate determination of whether the air conditioner has the second type of fault, and based on different exhaust temperature characteristics of different refrigerant faults in different periods after the compressor is started, accurate distinction between two different types of fault such as refrigerant blockage and refrigerant leakage occurring in the refrigeration system of the air conditioner can be effectively realized, so as to improve the accuracy of fault identification of the refrigeration system of the air conditioner.

Further, based on the above embodiment, another embodiment of the air conditioner fault identification method is provided. In this embodiment, the operation state parameters include a second type of parameters in addition to the first type of parameters, where the second type of parameters include a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of the indoor heat exchanger, a variation parameter of a coil temperature of the indoor heat exchanger, a frequency of the compressor and/or a current of the compressor. In other words, the operating state variable includes, in addition to the above-mentioned discharge temperature of the compressor, one of the parameters of the second type or a combination of at least two of the parameters. Specifically, in the present embodiment, the operating condition parameters include the discharge temperature of the compressor and all of the second type parameters listed above. In other embodiments, the second type of parameter may be set to other parameters than those listed herein (e.g., coil temperature of outdoor heat exchanger, outdoor ambient temperature, etc.) or may include discharge temperature of compressor and some of the second type of parameters listed herein, depending on actual demand.

On this basis, referring to fig. 4, after the step S10, the step S20 may further include:

step S201, judging whether the first exhaust temperature meets a first sub-condition or not, and the data corresponding to the second type of parameters in the first detection data meets the corresponding requirements in a second sub-condition;

when the first exhaust temperature meets the first sub-condition and the data corresponding to the second type of parameter in the first detection data meets the corresponding requirement in a second sub-condition, executing step S22; when the first exhaust temperature does not meet the first sub-condition, or when the data corresponding to the second type of parameter in the first detection data does not meet the corresponding requirement in the second sub-condition, step S23 is executed.

The data corresponding to the second type of parameter in the first detection data comprise a first change parameter of the indoor temperature, a second change parameter of the coil temperature, a first deviation parameter between the indoor temperature and the coil temperature, a first current and/or a first frequency, the first current is a compressor current detected when the running time of the compressor after starting reaches the first set time or more, and the first frequency is an operating frequency detected when the running time of the compressor after starting reaches the first set time or more.

It is easily understood that the number of types of parameters included in the second type of parameters corresponds to the type of detection data in the first detection data. The first set time period is the same as the first set time period in the above embodiment, and based on this, when the operation time period reaches the first set time period after the compressor is started, the first current, the first frequency and the first exhaust temperature may be detected simultaneously or sequentially according to the actual requirement.

Wherein the second sub-condition comprises:

a1, the first variation parameter is less than or equal to a first threshold value;

a2, the second variation parameter is less than or equal to a second threshold;

a3, the first deviation parameter is less than or equal to a third threshold;

a4, wherein the first current is less than or equal to a first set current; and/or the presence of a gas in the gas,

a5, the first frequency is greater than or equal to the first set frequency.

The specific values of the first threshold, the second threshold, the third threshold, the first set current and the first set frequency may be specifically set according to actual conditions, may be fixed parameters set in advance, and may also be parameters determined based on actual operating conditions of the air conditioner.

In this embodiment, an outdoor environment temperature is obtained, and a first set temperature and/or a first set current is obtained according to the outdoor environment temperature, where the first set temperature is increasing with an increase in the outdoor environment temperature, and the first set current is increasing with an increase in the outdoor environment temperature. The first set temperature and the first set current corresponding to different outdoor environment temperatures are different. Specifically, in this embodiment, the outdoor temperature range is divided into at least two outdoor temperature ranges, and the first set temperature and the first set current corresponding to different temperature ranges are different. For example, when T4 is within the range (-infinity, T4 a), the first set current is I1 and the first set temperature is Tp1, and when T4 is within the range [ T4a, + ∞ ], the first set current is I2 and the first set temperature is Tp2, wherein I2> I1 and Tp2> Tp 1.

The first variation parameter is specifically a parameter representing a variation characteristic of the indoor temperature, and may specifically include a variation amount, a variation rate, a variation curve, and the like of the indoor temperature. The second variation parameter is specifically a parameter representing a variation characteristic of the coil temperature of the indoor heat exchanger, and may specifically include a variation amount, a variation rate, a variation curve, and the like of the coil temperature of the indoor heat exchanger. The first deviation parameter is a characteristic parameter representing the deviation characteristic between the coil temperature and the indoor temperature of the indoor heat exchanger, and may specifically include a deviation amount, a deviation rate and the like.

Specifically, the content included in the second sub-condition may be set according to the parameter type included in the second type of parameter, and the second sub-condition at least includes the requirement corresponding to the parameter type in the second type of parameter. Based on this, when the second type of parameters include all the parameters listed above, the first detection data includes the first discharge temperature, the first variation parameter of the indoor temperature, the second variation parameter of the coil temperature, the first deviation parameter between the indoor temperature and the coil temperature, the first current detected when the operation duration reaches more than the first set duration after the compressor is started, the first discharge temperature and the first frequency, on this basis, if the first variation parameter conforms to a1, the second variation parameter conforms to a2, the first deviation parameter conforms to A3, the first current conforms to a4, the first discharge temperature conforms to a5, the first frequency conforms to a6, and the first discharge temperature is less than or equal to the first set temperature, the first detection data can be considered to satisfy the first determination condition, that is, the air conditioner has the first type of fault; if any one of the first variation parameter, the second variation parameter, the first deviation parameter, the first current, the first exhaust temperature and the first frequency does not meet the corresponding requirement in the second sub-condition, or the first exhaust temperature is greater than the first set temperature, it can be considered that the first detection data does not meet the first determination condition, that is, the air conditioner does not have the first type of fault. In addition, in another embodiment, when the parameter type included in the operation state parameter is different from the parameter type of the present embodiment, whether the first detection data satisfies the first determination condition may be determined by referring to the determination rule here.

In this embodiment, in addition to the judgment of the refrigerant blockage based on the detected exhaust temperature of the compressor, the refrigerant blockage is also judged in combination with the second type of parameter, and when the exhaust temperature and the detection data corresponding to the second type of parameter both satisfy the corresponding sub-conditions, it is determined that the air conditioner has the first type of fault; otherwise, it may be determined that the air conditioner does not have the first type of fault. Therefore, the identification result of the first type of fault can be ensured to be more accurate, so that the distinguishing result of different types of faults is more accurate, and particularly, when the second type of parameters comprise all the parameters listed above, the obtained fault identification result of the air conditioner can be most accurate.

Further, based on any of the above embodiments, a further embodiment of the air conditioner fault identification method is provided. In this embodiment, the operation state parameters include a second type of parameters in addition to the first type of parameters, where the second type of parameters include a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of the indoor heat exchanger, a variation parameter of a coil temperature of the indoor heat exchanger, a frequency of the compressor and/or a current of the compressor. In other words, the operating state variable includes, in addition to the above-mentioned discharge temperature of the compressor, one of the parameters of the second type or a combination of at least two of the parameters. Specifically, in the present embodiment, the operating condition parameters include the discharge temperature of the compressor and all of the second type parameters listed above. In other embodiments, the second type of parameter may be set to other parameters than those listed herein (e.g., coil temperature of outdoor heat exchanger, outdoor ambient temperature, etc.) or may include discharge temperature of compressor and some of the second type of parameters listed herein, depending on actual demand.

On this basis, referring to fig. 5, after the step S30, the step S50 may further include:

step S501, judging whether the second exhaust temperature meets a third sub-condition or not, and judging whether data corresponding to the second type of parameters in the second detection data meet corresponding requirements in a fourth sub-condition or not;

when the second exhaust temperature meets the third sub-condition and the data corresponding to the second type of parameter in the second detection data meets the corresponding requirement in a fourth sub-condition, executing step S52; when the second exhaust temperature does not meet the third sub-condition, or when the data corresponding to the second type of parameter in the second detection data does not meet the corresponding requirement in the fourth sub-condition, step S53 is executed.

The data corresponding to the second type of parameter in the second detection data includes a third variation parameter of the indoor temperature, a fourth variation parameter of the coil temperature, a second deviation parameter between the indoor temperature and the coil temperature, a second current and/or a second frequency, the second current is the compressor current detected when the running time length after the compressor is started reaches the second set time length or more, and the second frequency is the running frequency detected when the running time length after the compressor is started reaches the second set time length or more.

It is easily understood that the number of types of parameters included in the second type of parameters corresponds to the type of detection data in the second detection data. The second set time period is the same as the second set time period in the above embodiment, and based on this, when the operation time period reaches the second set time period after the compressor is started, the second current, the second frequency and the second exhaust temperature may be detected simultaneously or sequentially according to the actual requirement.

Wherein the fourth sub-condition comprises:

b1, the third variation parameter being less than or equal to a fourth threshold;

b2, the fourth variation parameter being less than or equal to a fifth threshold;

b3, the second deviation parameter being less than or equal to a sixth threshold;

b4, wherein the second current is less than or equal to a second set current; and/or the presence of a gas in the gas,

b5, the second frequency is greater than or equal to a second set frequency.

The specific values of the fourth threshold, the fifth threshold, the sixth threshold, the second setting current and the second setting frequency may be specifically set according to actual conditions, may be fixed parameters set in advance, and may also be parameters determined based on actual operating conditions of the air conditioner.

Here, the sixth threshold is larger than the third threshold.

In this embodiment, an outdoor environment temperature is obtained, and a second set temperature and/or a second set current is obtained according to the outdoor environment temperature, where the second set temperature is increasing with an increase in the outdoor environment temperature, and the second set current is increasing with an increase in the outdoor environment temperature. The second set temperature and the second set current corresponding to different outdoor ambient temperatures are different. Specifically, in this embodiment, the temperature control device is divided into at least two outdoor temperature intervals in advance, and the second set temperature and the second set current corresponding to different temperature intervals are different. For example, when T4 is within the range (- ∞, T4 b), the second set current is I3 and the second set temperature is Tp3, and when T4 is within the range [ T4b, + ∞ ], the second set current is I4 and the second set temperature is Tp4, wherein I4> I3 and Tp4> Tp 3.

The third variation parameter is specifically a parameter representing the variation characteristic of the indoor temperature, and may specifically include a variation amount, a variation rate, a variation curve, and the like of the indoor temperature. The fourth variation parameter is specifically a parameter representing a variation characteristic of the coil temperature of the indoor heat exchanger, and may specifically include a variation amount, a variation rate, a variation curve, and the like of the coil temperature of the indoor heat exchanger. The second deviation parameter is a characteristic parameter representing the deviation characteristic between the coil temperature of the indoor heat exchanger and the indoor temperature, and may specifically include a deviation amount, a deviation rate and the like.

Specifically, the content included in the fourth sub-condition may be set according to the type of the parameter included in the second type of parameter, and the fourth sub-condition at least includes the requirement corresponding to the type of the parameter in the second type of parameter. Based on this, when the second type of parameters include all the parameters listed above, the second detection data includes a second discharge temperature, a third variation parameter of the indoor temperature, a fourth variation parameter of the coil temperature, a second deviation parameter between the indoor temperature and the coil temperature, a second current detected when the operation duration reaches a second set duration or longer after the compressor is started, a second discharge temperature, and a second frequency, on this basis, if the third variation parameter meets B1, the fourth variation parameter meets B2, the second deviation parameter meets B3, the second current meets B4, the second discharge temperature meets B5, the second frequency meets B6, and the second discharge temperature is greater than or equal to the second set temperature, the second detection data may be considered to meet a second determination condition, that is, the air conditioner has a second type of fault; if any one of the third variation parameter, the fourth variation parameter, the second deviation parameter, the second current, the second exhaust temperature and the second frequency does not meet the corresponding requirement in the fourth sub-condition, or the second exhaust temperature is lower than the second set temperature, it can be considered that the second detection data does not meet the second determination condition, that is, the air conditioner does not have the second type of fault. In addition, in other embodiments, when the parameter type included in the operation state parameter is different from the parameter type of the present embodiment, whether the second detection data satisfies the second determination condition may be determined by referring to the determination rule here.

In this embodiment, besides the judgment of the refrigerant blockage based on the detected discharge temperature of the compressor, the refrigerant leakage is also judged in combination with the second type of parameter, and when the discharge temperature and the detection data corresponding to the second type of parameter both satisfy the corresponding sub-condition in the second judgment condition, it is determined that the air conditioner has the second type of fault; otherwise, it may be determined that the air conditioner does not have the second type of fault. Therefore, the identification result of the second type of fault can be ensured to be more accurate, so that the distinguishing result of different types of faults is more accurate, and particularly, when the second type of parameters comprise all the parameters listed above, the obtained fault identification result of the air conditioner can be most accurate.

Further, based on any one of the above embodiments, still another embodiment of the air conditioner fault identification method is provided. In this embodiment, if the first detection data or the second detection data in the above embodiment is defined as target detection data, and the type of the target fault is defined as a first type fault or a second type fault corresponding to the target detection data, referring to fig. 6, the step of performing the operation of detecting the operating state of the air conditioner to obtain the target detection data (i.e. any one of the steps S10 and S30) may include:

step S11, detecting operation of the running state parameters of the air conditioner to obtain first sub-detection data;

step S12, controlling the indoor fan to reduce the rotating speed for operation, or adjusting the operating rotating speed of the outdoor fan according to the current operating mode of the air conditioner and the target fault type;

the amplitude of the reduction of the running rotating speed of the indoor fan can be a preset amplitude, and can also be determined according to the actual running condition of the air conditioner.

And controlling the outdoor fan to increase or decrease the running speed according to the current running mode of the air conditioner. Specifically, when the operation mode is a refrigeration mode and the target fault type is a first type fault, controlling the outdoor fan to reduce the rotating speed for operation; when the operation mode is a refrigeration mode and the target fault type is a second type of fault, controlling the outdoor fan to increase the rotating speed to operate; when the operation mode is a heating mode and the target fault type is a first type fault, controlling the outdoor fan to increase the rotating speed to operate; and when the operation mode is a heating mode and the target fault type is a second type of fault, controlling the outdoor fan to reduce the rotating speed to operate. The adjustment range of the rotating speed of the outdoor fan can be a preset range, and can also be determined according to the actual running condition of the air conditioner.

In this embodiment, the rotation speeds of the indoor fan and the outdoor fan are selected to be adjusted. In other embodiments, the rotation speeds of the indoor fan and the outdoor fan can be adjusted simultaneously according to actual conditions. Specifically, the adjustment range of the rotating speed of the outdoor fan can be determined according to the adjustment range of the rotating speed of the indoor fan, so that the rotating speed running coordination of the indoor fan and the outdoor fan is ensured.

Step S13, executing the detection operation of the running state parameters of the air conditioner to obtain second sub-detection data;

step S14, the first sub detection data and the second sub detection data are regarded as the target detection data.

Based on the steps S11 to S14, after the step S10 or the step S30, the method may further include: judging whether the first sub-detection data and the second sub-detection data both meet a target judgment condition corresponding to the target detection data; the target judgment condition is a first judgment condition corresponding to the first detection data or a second judgment condition corresponding to the second detection data; if yes, determining that the target detection data meets the target judgment condition; if not, determining that the target detection data does not meet the target judgment condition.

When the target detection data is the first detection data, it may be determined whether the first sub detection data and the second sub detection data in the first detection data satisfy the first determination condition based on the refinement step of step S20 in the above embodiment; when the target detected data is the second detected data, it may be determined whether the first sub detected data and the second sub detected data in the second detected data satisfy the second determination condition based on the refinement step of step S50 in the above-described embodiment, respectively.

In this embodiment, the detection data applied to the refrigerant fault identification includes sub-detection data corresponding to the operation state parameters in two time periods before and after the adjustment of the rotation speed of the indoor and outdoor fans, and since the reduction of the rotation speed of the indoor fan or the adjustment of the rotation speed of the outdoor fan affects the dissipation of heat or cold of the refrigerant in the refrigeration system, wherein different rotation speed adjustment modes of the outdoor fan in different operation modes have substantial differences in the effects on the refrigeration system having different faults, so that the reduction of the rotation speed of the indoor fan and the adjustment of the rotation speed of the outdoor fan can make the detection data corresponding to the operation state parameters of the air conditioner affected by the refrigerant circulation more remarkable, based on this, if the detection data detected twice before and after and the determination conditions corresponding to the refrigerant fault types are in accordance with the distinguishing identification of different fault types of the refrigeration system, the accuracy of the recognition result is further improved.

Specifically, in this embodiment, the operation state parameters include a discharge temperature of the compressor, a variation parameter of the indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of the indoor heat exchanger, a variation parameter of the coil temperature of the indoor heat exchanger, a frequency of the compressor, and a current of the compressor, the target sub detection data is defined as first sub detection data or second sub detection data, and the first sub detection data or the second sub detection data is defined as the target sub detection data, and the step of performing the detection operation on the operation state parameter of the air conditioner to obtain the target sub detection data (i.e., any one of the steps S11 and S13) includes:

step S111, in a time period between a first time and a second time, detecting indoor temperature and coil temperature of an indoor heat exchanger to obtain a first indoor temperature and a first coil temperature;

the interval duration between the first time and the second time can be set according to actual conditions.

The interval duration between the first moment and the second moment when the first detection data is acquired and the interval duration between the first moment and the second moment when the second detection data is acquired can be set to be the same or different according to actual requirements. For example, the interval duration between the first timing and the second timing when the first detection data is acquired may be longer than the interval duration between the first timing and the second timing when the second detection data is acquired.

When any one of the detection data is acquired, the interval duration between the first time and the second time when the first sub-detection data is acquired and the interval duration between the first time and the second time when the second sub-detection data is acquired may be set to be the same or different according to actual requirements.

A period between the interval durations between the first time and the second time is defined as a first period. The first indoor temperature is specifically a characteristic temperature characterizing the indoor temperature in the first time period, and may be an average value, a maximum value, a minimum value, and the like of the indoor temperature in the first time period. The second indoor temperature is specifically a characteristic temperature characterizing the indoor temperature in the second time period, and may be an average value, a maximum value, a minimum value, and the like of the indoor temperature in the second time period.

Specifically, a plurality of indoor temperature values and a plurality of coil temperature values can be collected between the first moment and the second moment, the mean value of the plurality of indoor temperature values is calculated to serve as the first indoor temperature, and the mean value of the plurality of coil temperature values is calculated to serve as the first coil temperature.

Step S112, in a time period between the third time and the fourth time, detecting operation of the indoor temperature and the coil temperature of the indoor heat exchanger is executed, and a second indoor temperature and a second coil temperature are obtained; wherein the third time is greater than or equal to the second time;

the interval duration between the third time and the fourth time can be set according to actual conditions, and can be greater than, equal to or less than the interval duration between the first time and the second time.

The interval duration between the third time and the fourth time when the first detection data is acquired and the interval duration between the third time and the fourth time when the second detection data is acquired can be set to be the same or different according to actual requirements. For example, the interval duration between the third time and the fourth time when the first detection data is acquired may be longer than the interval duration between the third time and the fourth time when the second detection data is acquired.

When any one of the detection data is acquired, the interval duration between the third time and the fourth time when the first sub-detection data is acquired and the interval duration between the third time and the fourth time when the second sub-detection data is acquired may be set to be the same or different according to actual requirements.

A time period between the interval durations between the third time and the fourth time is defined as a second time period. The first coil temperature is specifically a characteristic temperature characterizing the coil temperature of the indoor heat exchanger in the first time period, and may be an average value, a maximum value, a minimum value, and the like of the coil temperature of the indoor heat exchanger in the first time period. The second coil temperature is specifically a characteristic temperature representing characteristics of the coil temperature of the indoor heat exchanger in the second time period, and may be an average value, a maximum value, a minimum value, and the like of the coil temperature of the indoor heat exchanger in the second time period.

Specifically, a plurality of indoor temperature values and a plurality of coil temperature values can be collected between the third moment and the fourth moment, the average value of the plurality of indoor temperature values is calculated to serve as the second indoor temperature, and the average value of the plurality of coil temperature values is calculated to serve as the second coil temperature.

Step S113, performing a detection operation on the frequency of the compressor, the current of the compressor, and the discharge temperature of the compressor at the fourth time to obtain a sub-frequency, a sub-current, and a sub-discharge temperature;

the four timings mentioned above have the following relationships: the first time < the second time is less than or equal to the third time < the fourth time.

Defining the starting time of the compressor as the starting time, and when the target detection data is the first detection data, no matter the first detection data or the second detection data is the first detection data, the interval time length between the fourth time and the starting time is greater than or equal to the first set time length in the above embodiment; when the target detection data is the second detection data, whether it is the first sub detection data or the second sub detection data in the second detection data, the interval duration between the fourth timing and the start timing herein is greater than or equal to the second set duration in the above-described embodiment.

Defining the fourth time when the first sub-detection data is obtained from the first detection data as t1, the fourth time when the second sub-detection data is obtained from the first detection data as t2, the fourth time when the first sub-detection data is obtained from the second detection data as t3, and the fourth time when the first sub-detection data is obtained from the second detection data as t4, then the following time sequence relations are provided: t1< t2< t3< t 4.

Step S114, determining first data, second data and third data in the target sub-detection data according to the first indoor temperature, the first coil temperature, the second indoor temperature and the second coil temperature; the first data are data corresponding to the variation parameters of the indoor temperature, the second data are data corresponding to the variation parameters of the coil temperature of the indoor heat exchanger, and the third data are data corresponding to the temperature deviation between the indoor temperature and the coil temperature of the indoor heat exchanger.

Specifically, a first indoor temperature difference between the first indoor temperature and the second indoor temperature is determined, a first coil temperature difference between the first coil temperature and the second coil temperature is determined, and a first temperature deviation between the second indoor temperature and the second coil temperature is determined; and taking the first indoor temperature difference as the first data, the first coil temperature difference as the second data, and the first temperature deviation as the third data.

The first data herein specifically refers to the first variation parameter or the third variation parameter in the above-described embodiment; the second data specifically refers to the second variation parameter or the fourth variation parameter in the above embodiment; the third data specifically refers to the first deviation parameter or the second deviation parameter in the above-described embodiment.

Step S115, regarding the sub-frequency, the sub-current, and the sub-discharge temperature as data corresponding to the frequency of the compressor, the current of the compressor, and the discharge temperature of the compressor in the target sub-detection data, respectively;

in this embodiment, when any sub-detection data of the first detection data and the second detection data is obtained, the influence of the indoor temperature and the coil temperature detected in two consecutive time periods on the refrigerant circulation on the temperature parameter is accurately represented, so that the two different refrigerant fault types can be accurately distinguished based on the first detection data and the second detection data detected in two consecutive time periods.

It should be noted that, when the operating condition parameters do not include all the parameter types listed above, the corresponding parameter detection process in the above steps S111 to S115 may be omitted adaptively. For example, when the operating condition parameters include the first type of parameter but not the second type of parameter, the exhaust gas temperature detected at the fourth timing may be directly used as the first detected data or the second detected data. For another example, when the operating condition parameter includes a variation parameter of the indoor temperature in the first type of parameter and the second type of parameter, but does not include other types of parameters, the coil temperature and the related parameter thereof may not be detected and determined in the above steps S111, S112, and S114, and other compressor parameters other than the discharge temperature may not be detected and processed in the above steps S113 and S115.

Based on the technical solutions in the above embodiments, the implementation details of the related solutions are illustrated below:

defining: t1: indoor ambient temperature, T2: indoor evaporator coil temperature, T3: outdoor condenser outlet temperature, T4: outdoor ambient temperature, F: compressor frequency, TP: compressor discharge port temperature, I: the compressor runs on current.

Step 1, after the compressor is started, collecting the average values of T1 and T2 in the time period from the initial time1 to the time2, and recording the average values as T1a and T2 a.

And step 2, collecting the average values of T1 and T2 in the time period from time3 to time4, and recording the average values as T1b and T2 b.

And (4) judging at the time of 4, if the following condition 1 is simultaneously met, preliminarily judging that the refrigerating system is possible to be completely blocked or the high-low pressure valve is not opened, and entering step 3 to confirm again. And if the refrigerant leakage can not be met at the same time, the step 4 is carried out, and whether refrigerant leakage exists is judged.

The condition 1 includes:

1)|T1b-T2b|＜X1、|T1b-T1a|＜X2、|T2b-T2a|＜X3；

2) the frequency F of the compressor is more than F1, and the continuous operation time is more than the preset time t 1;

3) t4 is not less than T4a, I is less than I1, TP is less than TP1 or T4 is more than T4a, I is less than I2, and TP is less than TP 2.

And 3, reducing the rotating speed of the inner fan or adjusting the rotating speed of the outdoor fan (reducing the rotating speed of the outdoor fan in a refrigeration mode and increasing the rotating speed of the outdoor fan in a heating mode), operating for a preset time T2, and collecting the average value of T1 and T2 in the last 1 minute or two minutes, wherein the average value is recorded as T1c and T2 c.

At the end of the time t2, the determination is made again while the following condition 2 is satisfied. And (4) judging the condition that the refrigerating system is completely blocked or the high-low pressure valve is not opened, and stopping the machine to report faults. And if the refrigerant leakage can not be met at the same time, the step 4 is carried out, and whether refrigerant leakage exists is judged.

The condition 2 includes:

1)|T1c-T2c|＜X1、|T1c-T1a|＜X2、|T2c-T2a|＜X3；

And step 4, collecting the average values of T1 and T2 in the time period from time5 to time6, and recording the average values as T1d and T2 d.

The judgment is made at time6 while the following condition 3 is satisfied. The possibility of refrigerant leakage in the refrigeration system is preliminarily determined, and the flow proceeds to step 5 to be confirmed again. If not, the refrigeration system is judged to be normal, and the detection is quitted.

Condition 3 includes:

1)|T1d-T2d|＜X4、|T1d-T1a|＜X5、|T2d-T2a|＜X6；

2) the frequency F of the compressor is more than F1, and the continuous operation time is more than the preset time t 3;

3) t4 is not less than T4a, I is less than I3, TP is more than TP3 or T4 is more than T4a, I is less than I4, and TP is more than TP 4.

Step 5, reducing the rotating speed of the internal fan or adjusting the rotating speed of the outdoor fan (increasing the rotating speed of the outdoor fan in a refrigeration mode and reducing the rotating speed of the outdoor fan in a heating mode), operating for a preset time t4, and collecting the rotating speed of the outdoor fan within the last 1 minute or two minutes

The average values of T1 and T2 are denoted as T1e and T2 e.

And when the time t4 is finished, judging again, and simultaneously, judging that the refrigerant leakage exists in the refrigeration system and the shutdown failure is reported when the condition 4 is met, judging that the refrigeration system is normal and exiting the detection when the condition is not met.

Condition 4 includes:

1)|T1e-T2e|＜X4、|T1e-T1a|＜X5、|T2e-T2a|＜X6；

Wherein, X1 < X4, X1, X2, X3, X4, X5, T4a, I1, I2, I3, I4, TP1, TP2, may be set to different values in the cooling mode and the heating mode.

Furthermore, an embodiment of the present invention further provides a readable storage medium, where an air conditioner fault recognition program is stored, and when being executed by a processor, the readable storage medium implements the relevant steps of any of the above air conditioner fault recognition methods.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An air conditioner fault identification method is characterized by comprising the following steps:

if the first detection data do not meet the first judgment condition, executing detection operation on the running state parameters to obtain second detection data; and

2. The method for identifying faults of an air conditioner as claimed in claim 1, wherein the faults of the first type comprise blockage faults of a refrigerating system, the operation state parameters comprise parameters of the first type, the parameters of the first type are exhaust temperatures of a compressor, the first detection data comprise first exhaust temperatures detected when the compressor is operated for more than a first set time after being started, and after the step of detecting the operation state parameters of the air conditioner in a starting stage of the compressor, the method further comprises the following steps of:

determining that the first detection data satisfies the first determination condition if the first exhaust temperature satisfies a first sub-condition; and

3. The method for identifying faults of an air conditioner as claimed in claim 2, wherein the operation state parameters further comprise a second type of parameters, the second type of parameters comprise a variation parameter of the indoor temperature, a temperature deviation between the indoor temperature and the coil temperature of the indoor heat exchanger, a variation parameter of the coil temperature of the indoor heat exchanger, a frequency of the compressor and/or a current of the compressor, and the step of performing a detection operation on the operation state parameters of the air conditioner during a start-up phase of the compressor to obtain the first detection data further comprises:

when the first exhaust temperature meets the first sub-condition and the data corresponding to the second type of parameter in the first detection data meets the corresponding requirement in a second sub-condition, determining that the first detection data meets the first judgment condition; and

4. The air conditioner fault identification method as claimed in claim 3, wherein the air conditioner fault identification method further comprises:

acquiring the outdoor environment temperature; and

5. The method of claim 2, wherein the second type of fault comprises a refrigerant system leak fault, the second sensed data comprises a second discharge temperature sensed when the compressor is operated for a time period greater than a second set time period after starting, the second set time period is greater than the first set time period, and the step of performing the sensing operation on the operating condition parameter to obtain the second sensed data further comprises:

if the second exhaust temperature meets a third sub-condition, determining that the second detection data meets the second determination condition; and

6. The method for identifying faults of an air conditioner as claimed in claim 5, wherein the operation state parameters further comprise a second type of parameters, the second type of parameters comprise a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of an indoor heat exchanger, a variation parameter of a coil temperature of an indoor heat exchanger, a frequency of a compressor and/or a current of the compressor, and the step of performing the detection operation on the operation state parameters to obtain second detection data further comprises the following steps:

when the second exhaust temperature meets the third sub-condition and data corresponding to the second type of parameter in the second detection data meets a corresponding requirement in a fourth sub-condition, determining that the second detection data meets the second determination condition; and

7. The air conditioner fault identification method as claimed in claim 6, wherein the air conditioner fault identification method further comprises:

acquiring the outdoor environment temperature; and

8. The air conditioner fault identification method according to any one of claims 1 to 7, wherein the step of defining target detection data as first detection data or second detection data, defining a target fault type as a first type fault or a second type fault corresponding to the target detection data, and performing a detection operation on an operation state parameter of the air conditioner to obtain the target detection data comprises:

executing the detection operation of the running state parameters of the air conditioner to obtain second sub-detection data; and

9. The air conditioner fault identifying method as claimed in claim 8, wherein after the step of performing the operation of detecting the operation state parameter of the air conditioner to obtain the target detection data, further comprising:

if yes, determining that the target detection data meets the target judgment condition; and

10. The air conditioner fault identification method of claim 8, wherein the step of adjusting the operation rotation speed of the outdoor fan according to the current operation mode of the air conditioner and the target fault type comprises:

11. The air conditioner fault identifying method as claimed in claim 8, wherein the operation state parameters include a discharge temperature of a compressor, a variation parameter of an indoor temperature, a temperature deviation between the indoor temperature and a coil temperature of an indoor heat exchanger, a variation parameter of a coil temperature of an indoor heat exchanger, a frequency of a compressor and a current of the compressor, the target sub-detection data is defined as first sub-detection data or second sub-detection data, the detecting operation of the operation state parameters of the air conditioner is performed, and the step of obtaining the target sub-detection data includes:

determining first data, second data and third data in the target sub-detection data according to the first indoor temperature, the first coil temperature, the second indoor temperature and the second coil temperature; and

12. The air conditioner fault identification method of claim 11, wherein the determining the first data, the second data and the third data of the target sub-detection data according to the first indoor temperature, the first coil temperature, the second indoor temperature and the second coil temperature comprises:

determining a first indoor temperature difference between the first indoor temperature and the second indoor temperature, determining a first coil temperature difference between the first coil temperature and the second coil temperature, determining a first temperature deviation between the second indoor temperature and the second coil temperature; and

13. An air conditioner fault recognition apparatus, characterized in that the air conditioner fault recognition apparatus comprises: a memory, a processor and an air conditioning fault identification program stored on the memory and operable on the processor, the air conditioning fault identification program when executed by the processor implementing the steps of the air conditioning fault identification method of any one of claims 1 to 12.

14. An air conditioner characterized in that it comprises the air conditioner malfunction recognition apparatus as claimed in claim 13.

15. A readable storage medium, characterized in that an air conditioner fault recognition program is stored thereon, which when executed by a processor implements the steps of the air conditioner fault recognition method according to any one of claims 1 to 12.