Air conditioner fault detection method and device, medium and air conditioner

Abstract

The invention relates to an air conditioner fault detection method and device, a medium and an air conditioner. The air conditioner fault detection method comprises the steps that in response to a received detection instruction, an indoor fan, an outdoor fan and a compressor of an air conditioner are controlled to operate in a detection mode so as to conduct refrigeration or heating, and in the detection mode, at least one of the following two is executed: the indoor fan and the outdoor fan are controlled to operate at a target rotating speed; controlling the compressor to operate at the target frequency; and when the running duration of the compressor in the detection mode reaches a duration threshold value, whether the air conditioner has a refrigerant circulation fault or not is determined according to the inner pipe temperature of an inner pipe for refrigerant transmission and / or the outer pipe temperature of an outer pipe for refrigerant transmission in the air conditioner. Therefore, by controlling the indoor fan, the outdoor fan and the compressor to operate in the specific detection mode, the detection method is optimized.

Description

Technical Field

[0001] The present disclosure relates to the field of air conditioning, and in particular to an air conditioning fault detection method, device, medium and air conditioner. Background Art

[0002] With the advancement of science and technology, air conditioning technology has also developed rapidly. Refrigerant is a substance in the air conditioner that transfers heat through evaporation and condensation. When the air conditioner is in cooling mode, the refrigerant liquefies and releases heat at the condenser of the outdoor unit, and vaporizes and absorbs heat at the evaporator of the indoor unit. When the air conditioner is in heating mode, the refrigerant vaporizes and absorbs heat in the outdoor unit, and liquefies and releases heat in the indoor unit. If the refrigerant cycle of the air conditioner fails (for example, the amount of refrigerant is insufficient or the shut-off valve is damaged), the cooling or heating effect of the air conditioner will deteriorate, and even affect the normal operation of the air conditioner, giving users a bad experience. Therefore, it is necessary to determine whether the air conditioner has a refrigerant cycle failure. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides an air conditioner fault detection method, device, medium and air conditioner.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided an air conditioner fault detection method, comprising:

[0005] In response to receiving the detection instruction, the indoor fan, the outdoor fan and the compressor of the air conditioner are controlled to operate in a detection mode to perform cooling or heating, wherein in the detection mode, at least one of the following two is performed:

[0006] Controlling the indoor fan and the outdoor fan to operate at a target speed;

[0007] controlling the compressor to operate at a target frequency;

[0008] When the duration of operation of the compressor in the detection mode reaches a duration threshold, determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature of the inner tube for refrigerant transmission in the air conditioner and / or the outer tube temperature of the outer tube for refrigerant transmission;

[0009] Wherein, when cooling is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the cooling mode, and the target frequency is greater than the frequency corresponding to the lowest temperature gear of the air conditioner compressor in the cooling mode;

[0010] When heating is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the heating mode, and the target frequency is greater than the frequency corresponding to the maximum temperature gear of the air conditioner compressor in the heating mode.

[0011] Optionally, in response to receiving the detection instruction, controlling the indoor fan, outdoor fan and compressor of the air conditioner to operate in a detection mode to perform cooling or heating includes:

[0012] In response to receiving the detection instruction, controlling the indoor fan and the outdoor fan to operate in a preparation mode, in which the indoor fan and the outdoor fan operate at their respective maximum speeds;

[0013] When the indoor fan and the outdoor fan are operated in the preparation mode for a predetermined time period, the indoor fan, the outdoor fan and the compressor are controlled to operate in the detection mode to perform cooling or heating.

[0014] Optionally, controlling the indoor fan, the outdoor fan, and the compressor to operate in the detection mode to perform cooling or heating includes:

[0015] If the outdoor ambient temperature is greater than a temperature threshold, controlling the indoor fan, the outdoor fan and the compressor to operate in the detection mode to perform cooling;

[0016] If the outdoor ambient temperature is less than or equal to the temperature threshold, the indoor fan, the outdoor fan and the compressor are controlled to operate in the detection mode to perform heating.

[0017] Optionally, the detection instructions include multiple ones, the target frequencies include multiple ones, the multiple detection instructions correspond to the multiple target frequencies one by one, and the method further includes:

[0018] The corresponding target frequency is determined according to the received detection instruction.

[0019] Optionally, determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature of the inner tube for refrigerant transmission in the air conditioner and / or the outer tube temperature of the outer tube for refrigerant transmission in the air conditioner includes any one of the following:

[0020] determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference;

[0021] Determining whether a refrigerant circulation failure occurs in the air conditioner according to the external tube temperature difference;

[0022] Determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference and the outer tube temperature difference;

[0023] The inner tube temperature difference is a difference between an initial inner tube temperature and a reference inner tube temperature, the initial inner tube temperature is the inner tube temperature at the initial moment when the compressor runs in the detection mode, and the reference inner tube temperature is the inner tube temperature when the duration of the compressor running in the detection mode reaches the duration threshold;

[0024] The outer tube temperature difference is the difference between the reference outer tube temperature and the initial outer tube temperature, the initial outer tube temperature is the outer tube temperature at the initial moment when the compressor runs in the detection mode, and the reference outer tube temperature is the outer tube temperature when the duration of the compressor running in the detection mode reaches the duration threshold.

[0025] Optionally, determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference includes:

[0026] If the absolute value of the inner tube temperature difference is greater than a first difference threshold, it is determined that the air conditioner is not short of fluorine;

[0027] If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0028] If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the shut-off valve is faulty, wherein the first difference is greater than the second difference threshold.

[0029] Optionally, determining whether a refrigerant circulation failure occurs in the air conditioner according to the external tube temperature difference includes:

[0030] If the absolute value of the outer tube temperature difference is greater than a third difference threshold, it is determined that the air conditioner is not short of fluorine;

[0031] If the absolute value of the outer tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0032] If the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the shut-off valve is faulty, wherein the third difference is greater than the fourth difference threshold.

[0033] Optionally, determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference and the outer tube temperature difference includes:

[0034] If the absolute value of the inner tube temperature difference is greater than the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the third difference threshold, it is determined that the air conditioner is not short of fluorine;

[0035] If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0036] If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty.

[0037] Optionally, the method further comprises:

[0038] If it is determined that a refrigerant circulation failure occurs in the air conditioner, a fault prompt message is output, wherein the fault prompt message includes fault type information;

[0039] and / or,

[0040] If it is determined that a refrigerant circulation failure occurs in the air conditioner, the air conditioner is controlled to be powered off.

[0041] According to a second aspect of an embodiment of the present disclosure, there is provided an air conditioner fault detection device, the device comprising:

[0042] A control module is configured to, in response to receiving a detection instruction, control the indoor fan, outdoor fan and compressor of the air conditioner to operate in a detection mode to perform cooling or heating, wherein in the detection mode, at least one of the following two is performed: controlling the indoor fan and the outdoor fan to operate at a target speed; controlling the compressor to operate at a target frequency;

[0043] A first determination module is configured to determine whether a refrigerant circulation failure occurs in the air conditioner according to an inner tube temperature of an inner tube for refrigerant transmission in the air conditioner and / or an outer tube temperature of an outer tube for refrigerant transmission when the duration for which the compressor operates in the detection mode reaches a duration threshold;

[0044] Wherein, when cooling is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the cooling mode, and the target frequency is greater than the frequency corresponding to the lowest temperature gear of the air conditioner compressor in the cooling mode;

[0045] When heating is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the heating mode, and the target frequency is greater than the frequency corresponding to the maximum temperature gear of the air conditioner compressor in the heating mode.

[0046] According to a third aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the air conditioning fault detection method provided in the first aspect of the present disclosure are implemented.

[0047] According to a fourth aspect of an embodiment of the present disclosure, there is provided an air conditioner, comprising:

[0048] processor;

[0049] a memory for storing instructions executable by the processor;

[0050] Wherein, the processor is configured to:

[0051] The steps for implementing the air conditioner fault detection method provided in the first aspect of the present disclosure are as follows.

[0052] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: in the detection mode, if the rotation speed of the indoor fan and the outdoor fan is lower than the rotation speed corresponding to the minimum wind speed gear in the cooling mode or the rotation speed corresponding to the minimum wind speed gear in the heating mode, the influence of the ambient temperature on the temperature of the inner tube and the outer tube is reduced, so that the temperature of the inner tube and the outer tube more reflects the effect of the refrigerant, thereby improving the accuracy of the refrigerant circulation fault detection according to the temperature of the inner tube and / or the outer tube; if the frequency of the compressor is greater than the frequency corresponding to the lowest temperature gear of the air conditioner in the cooling mode or the frequency corresponding to the highest temperature gear in the heating mode, the speed of the change of the tube temperature caused by the refrigerant circulation is accelerated, so that it is possible to quickly determine whether the air conditioner has a refrigerant circulation fault according to the temperature of the inner tube and / or the outer tube. In this solution, by controlling the indoor fan, the outdoor fan and the compressor to operate in a specific detection mode, it is determined whether the air conditioner has a refrigerant circulation fault, and the detection method is optimized.

[0053] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0055] Figure 1 The figure is a flow chart of a method for detecting air conditioner failure according to an exemplary embodiment.

[0056] Figure 2 The figure is a block diagram of a device for detecting air conditioner failure according to an exemplary embodiment.

[0057] Figure 3 The invention is a block diagram showing a device for detecting air conditioner faults according to an exemplary embodiment. DETAILED DESCRIPTION

[0058] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0059] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0060] Figure 1 FIG. 1 is a flow chart showing a method for detecting air conditioner failure according to an exemplary embodiment. Figure 1 As shown, the method includes the following steps.

[0061] In step S101, in response to receiving a detection instruction, the indoor fan, outdoor fan and compressor of the air conditioner are controlled to operate in a detection mode for cooling or heating, wherein in the detection mode, at least one of the following two is performed: controlling the indoor fan and the outdoor fan to operate at a target speed; controlling the compressor to operate at a target frequency.

[0062] Among them, when cooling is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the cooling mode, and the target frequency is greater than the frequency corresponding to the lowest temperature gear of the air conditioner compressor in the cooling mode; when heating is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the heating mode, and the target frequency is greater than the frequency corresponding to the highest temperature gear of the air conditioner compressor in the heating mode.

[0063] The speed corresponding to the minimum wind speed gear of the air conditioner fan in cooling mode may be equal to or different from the speed corresponding to the minimum wind speed gear in heating mode. The target speed of the air conditioner fan in cooling mode in detection mode may be equal to or different from the target speed of the air conditioner fan in heating mode in detection mode;

[0064] The frequency corresponding to the lowest temperature gear of the air conditioner compressor in cooling mode may be equal to or different from the frequency corresponding to the highest temperature gear in heating mode. The target frequency of the air conditioner compressor in cooling mode in detection mode may be equal to or different from the target frequency in heating mode in detection mode.

[0065] When the indoor fan, outdoor fan and compressor of the air conditioner are running in the detection mode, the air conditioner can perform cooling or heating. There can be multiple detection instructions, and multiple detection instructions correspond to multiple detection modes. In different detection modes, the operating states of the indoor fan, outdoor fan and compressor are different.

[0066] For example, if detection instruction A is received, it is determined to enter detection mode A1 for cooling, and the indoor and outdoor fans of the air conditioner can be controlled to run at the target speed (for example, 300r / min), and the compressor can be controlled to run at the frequency in cooling mode (for example, 30Hz-50Hz).

[0067] The temperature of the inner tube of the air conditioner is affected by the indoor ambient temperature on the one hand, and by the temperature of the refrigerant flowing through the inner tube on the other hand. When the indoor and outdoor fans are controlled to run at a speed lower than the speed corresponding to the minimum wind speed gear of the air conditioner in the cooling mode, the heat exchange efficiency between the inner tube and the indoor ambient temperature and the outer tube and the outdoor ambient temperature is low, the ambient temperature has little effect on the temperature of the inner and outer tubes, and the refrigerant circulation has a relatively large impact on the temperature change of the inner and outer tubes.

[0068] For another example, if a detection instruction B is received, the cooling detection mode B1 is entered, and the compressor can be controlled to operate at a target frequency (for example, 90 Hz), and the indoor and outdoor fans can be controlled to operate at a speed in the cooling mode (for example, 1000 r / min). When the compressor operates at the target frequency, the temperature change of the inner and outer pipes caused by the refrigerant circulation is accelerated.

[0069] If the detection instruction C is received, the detection mode C1 for cooling or heating is entered, and the compressor can be controlled to run at the target frequency, and the indoor fan and outdoor fan of the air conditioner can be controlled to run at the target speed. Since the indoor fan and outdoor fan of the air conditioner are controlled to run at the target speed in the detection mode, the influence of the ambient temperature on the inner tube temperature and the outer tube temperature can be reduced, so that the inner tube temperature and the outer tube temperature can better reflect the effect of the refrigerant. At the same time, controlling the compressor to run at the target frequency can also speed up the change of the inner tube and outer tube temperature caused by the refrigerant circulation. Therefore, when the compressor is controlled to run at the target frequency and the indoor fan and the outdoor fan are controlled to run at the target speed, it can be quickly and accurately determined whether the air conditioner has a refrigerant circulation failure based on the inner tube temperature and / or the outer tube temperature.

[0070] The detection instruction can be triggered by the user through the mobile terminal. Exemplarily, the user can send the corresponding detection instruction by touching the pre-set "Detection Mode 1" button, "Detection Mode 2" button, and "Detection Mode 3" button on the mobile terminal (such as a remote control). Different detection buttons correspond to different detection modes. After receiving the detection instruction, the indoor fan, outdoor fan and compressor of the air conditioner can be controlled to operate in the detection mode corresponding to the detection instruction.

[0071] In step S102, when the duration of the compressor running in the detection mode reaches a duration threshold, it is determined whether a refrigerant circulation failure occurs in the air conditioner based on the inner tube temperature of the inner tube for refrigerant transmission in the air conditioner and / or the outer tube temperature of the outer tube for refrigerant transmission.

[0072] The duration threshold may include multiple ones, and different detection modes may correspond to different duration thresholds. For example, when the indoor fan and the outdoor fan are controlled to run at the target speed, the duration threshold may be the first duration threshold, such as 60s; when the compressor is controlled to run at the target frequency and the indoor fan and the outdoor fan of the air conditioner are controlled to run at the target speed, the duration threshold may be the second duration threshold, such as 30s.

[0073] When the compressor runs in detection mode for a certain period of time, the temperature changes of the inner and outer pipes of the air conditioner have become obvious. It is possible to determine whether the air conditioner has a refrigerant circulation failure based on the inner and / or outer pipe temperatures.

[0074] For example, the temperature of the inner pipe can be obtained by a temperature sensor disposed on the inner pipe of the air conditioner, and the temperature of the outer pipe can be obtained by a temperature sensor disposed on the outer pipe of the air conditioner.

[0075] Through the above technical scheme, in the detection mode, if the speed of the indoor fan and the outdoor fan is lower than the speed corresponding to the minimum wind speed gear in the cooling mode or the minimum wind speed gear in the heating mode, the influence of the ambient temperature on the temperature of the inner tube and the outer tube is reduced, so that the temperature of the inner tube and the outer tube more reflects the effect of the refrigerant, thereby improving the accuracy of the refrigerant circulation fault detection based on the temperature of the inner tube and / or the outer tube; if the frequency of the compressor is greater than the frequency corresponding to the lowest temperature gear of the air conditioner in the cooling mode or the frequency corresponding to the highest temperature gear in the heating mode, the speed of the change of the tube temperature caused by the refrigerant circulation is accelerated, so that it is possible to quickly determine whether the air conditioner has a refrigerant circulation fault according to the temperature of the inner tube and / or the outer tube. In this scheme, by controlling the indoor fan, the outdoor fan and the compressor to operate in a specific detection mode, it is determined whether the air conditioner has a refrigerant circulation fault, and the detection method is optimized.

[0076] In another embodiment, in response to receiving the detection instruction, controlling the indoor fan, outdoor fan and compressor of the air conditioner to operate in the detection mode to perform cooling or heating includes:

[0077] In response to receiving the detection instruction, controlling the indoor fan and the outdoor fan to operate in a preparation mode, in which the indoor fan and the outdoor fan operate at their respective maximum speeds;

[0078] When the indoor fan and the outdoor fan are operated in the preparation mode for a predetermined time, the indoor fan, the outdoor fan and the compressor are controlled to operate in the detection mode to perform cooling or heating.

[0079] If in the detection mode, the difference between the indoor ambient temperature and the inner tube temperature is large, and the difference between the outdoor ambient temperature and the outer tube temperature is large, then the ambient temperature has a relatively large impact on the inner tube temperature and the outer tube temperature, so that the effect of the refrigerant is less reflected in the inner tube temperature and the outer tube temperature, thereby affecting the accuracy of the refrigerant circulation fault detection result. Therefore, when receiving the detection instruction, the air conditioner can be controlled to enter the preparation mode first to reduce the error of the refrigerant circulation fault detection result. In the preparation mode, the indoor fan and the outdoor fan are controlled to run at their respective maximum speeds (for example, both are 2000r / min). The greater the speed of the indoor fan and the outdoor fan, the higher the heat exchange efficiency between the inner tube and the outer tube of the air conditioner and the ambient temperature. When the indoor fan and the outdoor fan run at their respective maximum speeds for a predetermined time, it can be considered that after heat exchange, the inner tube temperature and the indoor ambient temperature, the outer tube temperature and the outdoor ambient temperature are close, and the indoor fan, the outdoor fan and the compressor can be controlled to run in the detection mode.

[0080] In this embodiment, before controlling the indoor fan, outdoor fan and compressor to operate in detection mode, the indoor fan and outdoor fan of the air conditioner are controlled to operate at their respective maximum speeds for a predetermined period of time. This can quickly and reliably keep the indoor ambient temperature and inner pipe temperature, and the outdoor ambient temperature and outer pipe temperature equivalent, thereby further improving the accuracy of the refrigerant circulation fault detection results.

[0081] In another embodiment, the control of the indoor fan, the outdoor fan and the compressor to operate in the detection mode to perform cooling or heating includes:

[0082] If the outdoor ambient temperature is greater than the temperature threshold, the indoor fan, outdoor fan and compressor are controlled to operate in a detection mode for cooling;

[0083] If the outdoor ambient temperature is less than or equal to the temperature threshold, the indoor fan, outdoor fan and compressor are controlled to operate in the detection mode to perform heating.

[0084] When controlling the air conditioner to cool or heat in the detection mode, the outdoor ambient temperature can be considered. In winter, the outdoor ambient temperature is low, and heating can be performed while detecting to meet the user's heating needs. In summer, the outdoor ambient temperature is high, and cooling can be performed while detecting to meet the user's cooling needs. Therefore, the indoor fan, outdoor fan and compressor can be controlled to operate in the detection mode according to the outdoor ambient temperature to perform cooling or heating. The temperature threshold can be pre-set by the designer, for example, it can be 20°C.

[0085] In this embodiment, the air conditioner is controlled to cool or heat according to the outdoor ambient temperature during detection, thereby saving energy waste and improving user experience.

[0086] In another embodiment, the detection instructions include multiple ones, the target frequencies include multiple ones, the multiple detection instructions correspond to the multiple target frequencies one by one, and the method further includes:

[0087] The corresponding target frequency is determined according to the received detection instruction.

[0088] The target frequency of the compressor is greater than the compressor frequency corresponding to the lowest temperature gear of the air conditioner in the cooling mode. On the one hand, the higher the frequency of the compressor, the faster the changes in the inner tube temperature and the outer tube temperature caused by the refrigerant circulation, and the earlier the refrigerant circulation fault detection result can be determined. On the other hand, the higher the frequency of the compressor, the higher the pressure inside the air-conditioning system, and the lower the safety of the air-conditioning system. Therefore, multiple target frequencies can be set, corresponding to multiple detection instructions respectively. For example, if the detection instruction Q is received, the target frequency is determined to be Q1 frequency; if the detection instruction W is received, the target frequency is determined to be W1 frequency. The user can select the triggered detection instruction according to the speed requirement of the refrigerant circulation fault detection and consider the safety of the air-conditioning system, so as to determine the target frequency of the compressor.

[0089] In this embodiment, by making a one-to-one correspondence between a plurality of detection instructions and a plurality of target frequencies, and determining the corresponding target frequency according to the received detection instructions, the personalized needs of the user when performing refrigerant circulation fault detection can be met.

[0090] In another embodiment, the above-mentioned determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature of the inner tube for refrigerant transmission in the air conditioner and / or the outer tube temperature of the outer tube for refrigerant transmission includes any one of the following:

[0091] Determine whether the air conditioner has a refrigerant circulation failure based on the internal pipe temperature difference;

[0092] Determine whether the air conditioner has a refrigerant circulation failure based on the external pipe temperature difference;

[0093] Determine whether the air conditioner has a refrigerant circulation failure based on the inner tube temperature difference and the outer tube temperature difference.

[0094] Among them, the inner tube temperature difference is the difference between the initial inner tube temperature and the reference inner tube temperature. The initial inner tube temperature is the inner tube temperature at the initial moment when the compressor runs in the detection mode. The reference inner tube temperature is the inner tube temperature when the duration of the compressor running in the detection mode reaches the duration threshold.

[0095] The outer tube temperature difference is the difference between the reference outer tube temperature and the initial outer tube temperature. The initial outer tube temperature is the outer tube temperature at the initial moment when the compressor runs in the detection mode. The reference outer tube temperature is the outer tube temperature when the duration of the compressor running in the detection mode reaches a duration threshold.

[0096] When the indoor fan, outdoor fan and compressor are running in detection mode, the temperature of the inner tube decreases and the temperature of the outer tube increases. When the duration of the compressor running in detection mode reaches the duration threshold, it can be considered that the changes in the inner tube temperature and the outer tube temperature have been obvious. The outer tube temperature difference can reflect the change in the outer tube temperature from the initial moment when the compressor runs in detection mode and the time when the duration of the compressor running in detection mode reaches the duration threshold. The inner tube temperature difference can reflect the change in the inner tube temperature from the initial moment when the compressor runs in detection mode and the time when the compressor runs in detection mode reaches the duration threshold. And, since the changes in the inner tube temperature and the outer tube temperature are both caused by the refrigerant circulation, it is possible to determine whether the air conditioner has a refrigerant circulation failure based on the inner tube temperature difference or the outer tube temperature difference alone, or it is possible to determine whether the air conditioner has a refrigerant circulation failure based on the combination of the inner tube temperature difference and the outer tube temperature difference.

[0097] In this embodiment, whether a refrigerant circulation failure occurs in the air conditioner can be reliably determined based on the inner tube temperature difference or the outer tube temperature difference alone, or based on the inner tube temperature difference and the outer tube temperature difference.

[0098] In yet another embodiment, the above-mentioned determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference includes:

[0099] If the absolute value of the inner tube temperature difference is greater than the first difference threshold, it is determined that the air conditioner is not short of fluorine;

[0100] If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0101] If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty, wherein the first difference is greater than the second difference threshold.

[0102] When the air conditioner is cooling in the detection mode, the inner tube temperature decreases, the inner tube temperature difference is positive, the outer tube temperature increases, and the outer tube temperature difference is positive; when the air conditioner is heating in the detection mode, the inner tube temperature increases, the inner tube temperature difference is negative, the outer tube temperature decreases, and the outer tube temperature difference is negative. The absolute value of the inner tube temperature difference and the absolute value of the outer tube temperature difference respectively reflect the magnitude of the temperature change of the inner tube and the outer tube.

[0103] When the duration of the compressor running in the detection mode reaches the duration threshold, if the absolute value of the inner tube temperature difference is greater than the first difference threshold, it can be considered that the refrigerant circulation causes a large change in the value of the inner tube temperature, the air conditioning cooling or heating effect is good, and the air conditioning is determined to be not lacking in fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold, and is less than or equal to the first difference threshold, it can be considered that the refrigerant circulation causes a small change in the value of the inner tube temperature, the air conditioning cooling or heating effect is poor, and the air conditioning is determined to be moderately lacking in fluorine; if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, it can be considered that the refrigerant circulation causes a very small change in the value of the inner tube temperature, the air conditioning cooling or heating effect is extremely poor, and the air conditioning is determined to be severely lacking in fluorine and / or the stop valve is faulty. The stop valve is used to control the refrigerant flow in the air conditioning system. When the air conditioner is cooling or heating, the stop valve should be in the open state.

[0104] Exemplarily, when in the detection mode (cooling), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a frequency (50Hz) in the cooling mode for a duration threshold (60s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (5°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold (2°C), and is less than or equal to the first difference threshold (5°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (2°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0105] Exemplarily, when in the detection mode (cooling), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a target frequency (90Hz). When the duration of the compressor running at the target frequency reaches a duration threshold (30s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (4°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold (2°C) and is less than or equal to the first difference threshold (4°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (2°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0106] Exemplarily, when in detection mode (heating), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a frequency (50Hz) in the heating mode for a duration threshold (60s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (7°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold (3°C), and is less than or equal to the first difference threshold (7°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (3°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0107] Exemplarily, when in detection mode (heating), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a target frequency (95Hz). When the duration of the compressor running at the target frequency reaches a duration threshold (30s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (5°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold (3°C) and is less than or equal to the first difference threshold (5°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (3°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0108] In this embodiment, by comparing the absolute value of the inner tube temperature difference with a preset difference threshold, it is possible to reliably and quickly determine whether a refrigerant circulation failure occurs in the air conditioner.

[0109] In yet another embodiment, the above-mentioned determining whether a refrigerant circulation failure occurs in the air conditioner according to the external tube temperature difference includes:

[0110] If the absolute value of the external tube temperature difference is greater than the third difference threshold, it is determined that the air conditioner is not short of fluorine;

[0111] If the absolute value of the external tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0112] If the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty, wherein the third difference is greater than the fourth difference threshold.

[0113] When the length of time the compressor runs in detection mode reaches the length threshold, if the absolute value of the external tube temperature difference is greater than the third difference threshold, it can be considered that the refrigerant circulation causes a large change in the external tube temperature, and the air conditioning cooling effect or heating effect is good, and it is determined that the air conditioner is not short of fluorine; if the absolute value of the external tube temperature difference is greater than the fourth difference threshold, and is less than or equal to the third difference threshold, it can be considered that the refrigerant circulation causes a small change in the external tube temperature, and the air conditioning cooling effect or heating effect is poor, and it is determined that the air conditioner is moderately short of fluorine; if the absolute value of the external tube temperature difference is less than or equal to the fourth difference threshold, it can be considered that the refrigerant circulation causes an extremely small change in the external tube temperature, and the air conditioner is close to not cooling or heating, and it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0114] Exemplarily, when in the detection mode (cooling), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a frequency (50Hz) in the cooling mode for a duration threshold (60s), if the absolute value of the external tube temperature difference is greater than the third difference threshold (4°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the external tube temperature difference is greater than the fourth difference threshold (2°C), and is less than or equal to the third difference threshold (4°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the external tube temperature difference is less than or equal to the fourth difference threshold (2°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0115] Exemplarily, when in the detection mode (cooling), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a target frequency (90Hz) for a duration threshold (30s), if the absolute value of the external tube temperature difference is greater than the third difference threshold (3°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the external tube temperature difference is greater than the fourth difference threshold (2°C), and is less than or equal to the third difference threshold (3°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the external tube temperature difference is less than or equal to the fourth difference threshold (2°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0116] Exemplarily, when in detection mode (heating), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a frequency (50Hz) in heating mode for a duration threshold (60s), if the absolute value of the external tube temperature difference is greater than the third difference threshold (3°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the external tube temperature difference is greater than the fourth difference threshold (1°C), and is less than or equal to the third difference threshold (3°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the external tube temperature difference is less than or equal to the fourth difference threshold (1°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0117] Exemplarily, when in detection mode (heating), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a target frequency (95Hz) for a duration threshold (30s), if the absolute value of the external tube temperature difference is greater than the third difference threshold (3°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the external tube temperature difference is greater than the fourth difference threshold (1°C), and is less than or equal to the third difference threshold (3°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the external tube temperature difference is less than or equal to the fourth difference threshold (1°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0118] In this embodiment, by comparing the absolute value of the outer tube temperature difference with a preset difference threshold, it is possible to reliably and quickly determine whether a refrigerant circulation failure occurs in the air conditioner.

[0119] In another embodiment, the above-mentioned determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference and the outer tube temperature difference includes:

[0120] If the absolute value of the inner tube temperature difference is greater than the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the third difference threshold, it is determined that the air conditioner is not short of fluorine;

[0121] If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0122] If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty.

[0123] When the duration of the compressor running in the detection mode reaches the duration threshold, if the absolute value of the inner tube temperature difference is greater than the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the third difference threshold, it can be considered that the refrigerant circulation causes a large change in the value of the outer tube temperature, the large change in the value of the inner tube temperature, and the good cooling or heating effect of the air conditioner, and it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold, and is less than or equal to the first difference threshold, the absolute value of the outer tube temperature difference is greater than the fourth difference threshold, and is less than or equal to the third difference threshold, it can be considered that the refrigerant circulation causes a small change in the value of the outer tube temperature, the small change in the value of the inner tube temperature, and the poor cooling or heating effect of the air conditioner, and it is determined that the air conditioner is moderately short of fluorine; if the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, and the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, it can be considered that the refrigerant circulation causes a very small change in the value of the outer tube temperature, the very small change in the value of the inner tube temperature, and the air conditioner is close to not cooling or heating, and it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0124] Exemplarily, when in the detection mode (cooling), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a frequency (50Hz) in the cooling mode for a duration threshold (60s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (5°C) and the absolute value of the outer tube temperature difference is greater than the third difference threshold (4°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the outer tube temperature difference is greater than the fourth difference threshold (2°C) and is less than or equal to the third difference threshold (4°C), and the absolute value of the inner tube temperature difference is greater than the second difference threshold (2°C) and is less than or equal to the first difference threshold (5°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (2°C), and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold (2°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0125] Exemplarily, when in the detection mode (cooling), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a target frequency (90Hz) for a duration threshold (30s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (4°C) and the absolute value of the outer tube temperature difference is greater than the third difference threshold (3°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold (2°C) and is less than or equal to the first difference threshold (4°C), and the absolute value of the outer tube temperature difference is greater than the fourth difference threshold (2°C) and is less than or equal to the third difference threshold (3°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (2°C) and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold (2°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0126] Exemplarily, when in the detection mode (heating), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a frequency (50Hz) in the cooling mode for a duration threshold (60s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (7°C) and the absolute value of the outer tube temperature difference is greater than the third difference threshold (3°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the outer tube temperature difference is greater than the fourth difference threshold (1°C) and is less than or equal to the third difference threshold (3°C), and the absolute value of the inner tube temperature difference is greater than the second difference threshold (3°C) and is less than or equal to the first difference threshold (7°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (3°C), and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold (1°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0127] Exemplarily, when in the detection mode (heating), the indoor and outdoor fans of the air conditioner are controlled to run at a target speed (300r / min), and the compressor is controlled to run at a target frequency (95Hz) for a duration threshold (30s), if the absolute value of the inner tube temperature difference is greater than the first difference threshold (5°C) and the absolute value of the outer tube temperature difference is greater than the third difference threshold (3°C), it is determined that the air conditioner is not short of fluorine; if the absolute value of the inner tube temperature difference is greater than the second difference threshold (3°C) and is less than or equal to the first difference threshold (5°C), and the absolute value of the outer tube temperature difference is greater than the fourth difference threshold (1°C) and is less than or equal to the third difference threshold (3°C), it is determined that the air conditioner is moderately short of fluorine: if the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold (3°C) and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold (1°C), it is determined that the air conditioner is severely short of fluorine and / or the shut-off valve is faulty.

[0128] In this embodiment, the absolute value of the outer tube temperature difference and the absolute value of the inner tube temperature difference are compared with the preset difference thresholds, so as to reliably and quickly determine whether a refrigerant circulation failure occurs in the air conditioner.

[0129] In yet another embodiment, the above method further includes:

[0130] If it is determined that a refrigerant circulation fault occurs in the air conditioner, a fault prompt message is output, and the fault prompt message includes fault type information.

[0131] After determining that the air conditioner has a refrigerant circulation failure, a prompt message including the fault type information can be output. For example, if it is determined that the air conditioner is seriously lacking in fluorine and / or the stop valve is faulty, a pop-up message can be controlled to be output on the indoor unit screen of the air conditioner: "The air conditioner is seriously lacking in fluorine or the stop valve is faulty"; if it is determined that the air conditioner is moderately lacking in fluorine, a pop-up message can be controlled to be output on the indoor unit screen of the air conditioner: "The air conditioner is moderately lacking in fluorine".

[0132] In this embodiment, after determining that a refrigerant circulation fault occurs in the air conditioner, a prompt message including fault type information is output, which facilitates the user to take corresponding measures in a timely manner, thereby improving safety.

[0133] In yet another embodiment, the above method further includes:

[0134] If it is determined that a refrigerant circulation failure occurs in the air conditioner, the air conditioner is controlled to be powered off.

[0135] If the air conditioner is running when a refrigerant circulation failure occurs, it may cause damage to the air conditioner, and the air conditioner can be controlled to be powered off. For example, when it is determined that the air conditioner is seriously lacking in fluorine and / or the shut-off valve is faulty, the air conditioner is controlled to be powered off. For another example, since the risk of damage to the air conditioner when running in a cooling state is low when there is a moderate lack of fluorine, when it is determined that the air conditioner has a moderate lack of fluorine, a fault prompt message can be output and the air conditioner can be controlled to be powered off to remind the user to deal with it in time. In addition, it can be set that the air conditioner can still be powered on and run after receiving the user's power-on command.

[0136] For example, if it is determined that no refrigerant circulation failure occurs in the air conditioner, the air conditioner may be controlled to enter a cooling mode.

[0137] In this embodiment, when it is determined that a refrigerant circulation failure occurs in the air conditioner, the air conditioner is controlled to be powered off, thereby reducing the probability of damage to the air conditioner and increasing the life of the air conditioner.

[0138] In yet another embodiment, if it is determined that a refrigerant circulation failure occurs in the air conditioner, a fault prompt message may be output and the air conditioner may be controlled to be powered off.

[0139] Based on the same inventive concept, the present disclosure also provides an air conditioner fault detection device. Figure 2FIG. 1 is a block diagram of an air conditioner fault detection device according to an exemplary embodiment. Figure 2 As shown, the air conditioner fault detection device 200 includes a control module 201 and a first determination module 202 .

[0140] The control module 201 is configured to control the indoor fan, outdoor fan and compressor of the air conditioner to operate in a detection mode for cooling or heating in response to receiving a detection instruction, wherein in the detection mode, at least one of the following two is performed: controlling the indoor fan and the outdoor fan to operate at a target speed; controlling the compressor to operate at a target frequency.

[0141] The first determination module 202 is configured to determine whether a refrigerant circulation failure occurs in the air conditioner based on the inner tube temperature of the inner tube for refrigerant transmission and / or the outer tube temperature of the outer tube for refrigerant transmission in the air conditioner when the duration of the compressor running in the detection mode reaches a duration threshold.

[0142] When cooling in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the cooling mode, and the target frequency is greater than the frequency corresponding to the lowest temperature gear of the air conditioner compressor in the cooling mode;

[0143] When heating in detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in heating mode, and the target frequency is greater than the frequency corresponding to the maximum temperature gear of the air conditioner compressor in heating mode.

[0144] Optionally, the control module 201 includes a first control submodule and a second control submodule.

[0145] The first control submodule is configured to control the indoor fan and the outdoor fan to operate in a preparation mode in response to receiving the detection instruction. In the preparation mode, the indoor fan and the outdoor fan operate at their respective maximum speeds.

[0146] The second control submodule is configured to control the indoor fan, the outdoor fan and the compressor to operate in the detection mode to perform cooling or heating when the indoor fan and the outdoor fan operate in the preparation mode for a predetermined period of time.

[0147] Optionally, the second control submodule is further configured to:

[0148] If the outdoor ambient temperature is greater than the temperature threshold, the indoor fan, outdoor fan and compressor are controlled to operate in a detection mode for cooling;

[0149] If the outdoor ambient temperature is less than or equal to the temperature threshold, the indoor fan, outdoor fan and compressor are controlled to operate in the detection mode to perform heating.

[0150] Optionally, the detection instructions include multiple, the target frequencies include multiple, the multiple detection instructions correspond to the multiple target frequencies one by one, and the air conditioner fault detection device 200 further includes a second determination module.

[0151] The second determination module is configured to determine the corresponding target frequency according to the received detection instruction.

[0152] Optionally, the first determining module 202 includes a first determining submodule, a second determining submodule and a third determining submodule.

[0153] The first determination submodule is configured to determine whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference.

[0154] The second determination submodule is configured to determine whether a refrigerant circulation failure occurs in the air conditioner according to the external pipe temperature difference.

[0155] The third determination submodule is configured to determine whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference and the outer tube temperature difference.

[0156] The inner tube temperature difference is the difference between the initial inner tube temperature and the reference inner tube temperature, the initial inner tube temperature is the inner tube temperature at the initial moment when the compressor runs in the detection mode, and the reference inner tube temperature is the inner tube temperature when the duration of the compressor running in the detection mode reaches the duration threshold;

[0157] The outer tube temperature difference is the difference between the reference outer tube temperature and the initial outer tube temperature. The initial outer tube temperature is the outer tube temperature at the initial moment when the compressor runs in the detection mode. The reference outer tube temperature is the outer tube temperature when the duration of the compressor running in the detection mode reaches a duration threshold.

[0158] Optionally, the first determining submodule is further configured to:

[0159] If the absolute value of the inner tube temperature difference is greater than the first difference threshold, it is determined that the air conditioner is not short of fluorine;

[0160] If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0161] If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty, wherein the first difference is greater than the second difference threshold.

[0162] Optionally, the second determining submodule is further configured to:

[0163] If the absolute value of the external tube temperature difference is greater than the third difference threshold, it is determined that the air conditioner is not short of fluorine;

[0164] If the absolute value of the external tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0165] If the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty, wherein the third difference is greater than the fourth difference threshold.

[0166] Optionally, the third determining submodule is further configured to:

[0167] If the absolute value of the inner tube temperature difference is greater than the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the third difference threshold, it is determined that the air conditioner is not short of fluorine;

[0168] If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine:

[0169] If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty.

[0170] Optionally, the air conditioning fault detection device 200 further includes an output module.

[0171] The output module is configured to output a fault prompt message if it is determined that a refrigerant circulation fault occurs in the air conditioner, and the fault prompt message includes fault type information.

[0172] Optionally, the control module is further configured to control the air conditioner to power off if it is determined that a refrigerant circulation failure occurs in the air conditioner.

[0173] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0174] By adopting the above technical scheme, in the detection mode, if the rotation speed of the indoor fan and the outdoor fan is lower than the rotation speed corresponding to the minimum wind speed gear in the cooling mode or the rotation speed corresponding to the minimum wind speed gear in the heating mode, the influence of the ambient temperature on the temperature of the inner tube and the outer tube is reduced, so that the temperature of the inner tube and the outer tube more reflects the effect of the refrigerant, thereby improving the accuracy of the refrigerant circulation fault detection according to the temperature of the inner tube and / or the outer tube; if the frequency of the compressor is greater than the frequency corresponding to the lowest temperature gear of the air conditioner in the cooling mode or the frequency corresponding to the highest temperature gear in the heating mode, the speed of the change of the tube temperature caused by the refrigerant circulation is accelerated, so that it is possible to quickly determine whether the air conditioner has a refrigerant circulation fault according to the temperature of the inner tube and / or the outer tube. In this scheme, by controlling the indoor fan, the outdoor fan and the compressor to operate in a specific detection mode, it is determined whether the air conditioner has a refrigerant circulation fault, and the detection method is optimized.

[0175] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and when the program instructions are executed by a processor, the steps of the air conditioner fault detection method provided by the present disclosure are implemented.

[0176] The present disclosure also provides an air conditioner, comprising:

[0177] processor;

[0178] a memory for storing processor-executable instructions;

[0179] Among them, the processor is configured to: implement the steps of the air conditioning fault detection method provided by the present disclosure.

[0180] Figure 3 8 is a block diagram of an apparatus 800 for air conditioner fault detection according to an exemplary embodiment. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0181] Reference Figure 3 , the device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output interface 812 , a sensor component 814 , and a communication component 816 .

[0182] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned air conditioner fault detection method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0183] The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0184] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0185] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0186] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the device 800 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0187] The input / output interface 812 provides an interface between the processing component 802 and the peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0188] The sensor assembly 814 includes one or more sensors for providing various aspects of the status assessment of the device 800. For example, the sensor assembly 814 can detect the open / closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor assembly 814 can also detect the position change of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and the temperature change of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0189] The communication component 816 is configured to facilitate wired or wireless communication between the device 800 and other devices. The device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0190] In an exemplary embodiment, the device 800 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above-mentioned air conditioning fault detection method.

[0191] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by a processor 820 of the device 800 to complete the above-mentioned air conditioner fault detection method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0192] In addition to being an independent electronic device, the above-mentioned device can also be a part of an independent electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be an IC or a collection of multiple ICs; the chip can include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC), etc. The above-mentioned integrated circuit or chip can be used to execute executable instructions (or codes) to implement the above-mentioned air conditioner fault detection method. The executable instructions can be stored in the integrated circuit or chip, or can be obtained from other devices or equipment, such as the integrated circuit or chip including a processor, a memory, and an interface for communicating with other devices. The executable instruction can be stored in the memory, and when the executable instruction is executed by the processor, the above-mentioned air conditioning fault detection method is implemented; alternatively, the integrated circuit or chip can receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned air conditioning fault detection method.

[0193] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program that can be executed by a programmable device. The computer program has a code portion for executing the above-mentioned air conditioner fault detection method when executed by the programmable device.

[0194] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0195] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for detecting air conditioner faults, characterized in that: include: In response to receiving the detection instruction, the indoor fan, the outdoor fan and the compressor of the air conditioner are controlled to operate in a detection mode to perform cooling or heating, wherein in the detection mode, at least one of the following two is performed: Controlling the indoor fan and the outdoor fan to operate at a target speed; controlling the compressor to operate at a target frequency; When the duration of operation of the compressor in the detection mode reaches a duration threshold, determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature of the inner tube for refrigerant transmission in the air conditioner and / or the outer tube temperature of the outer tube for refrigerant transmission; Wherein, when cooling is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the cooling mode, and the target frequency is greater than the frequency corresponding to the lowest temperature gear of the air conditioner compressor in the cooling mode; When heating is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner fan in the heating mode, and the target frequency is greater than the frequency corresponding to the maximum temperature gear of the air conditioner compressor in the heating mode.

2. The method according to claim 1, characterized in that In response to receiving the detection instruction, controlling the indoor fan, the outdoor fan and the compressor of the air conditioner to operate in the detection mode to perform cooling or heating, including: In response to receiving the detection instruction, controlling the indoor fan and the outdoor fan to operate in a preparation mode, in which the indoor fan and the outdoor fan operate at their respective maximum speeds; When the indoor fan and the outdoor fan are operated in the preparation mode for a predetermined time period, the indoor fan, the outdoor fan and the compressor are controlled to operate in the detection mode to perform cooling or heating.

3. The method according to claim 2, characterized in that The controlling the indoor fan, the outdoor fan and the compressor to operate in the detection mode to perform cooling or heating includes: If the outdoor ambient temperature is greater than a temperature threshold, controlling the indoor fan, the outdoor fan and the compressor to operate in the detection mode to perform cooling; If the outdoor ambient temperature is less than or equal to the temperature threshold, the indoor fan, the outdoor fan and the compressor are controlled to operate in the detection mode to perform heating.

4. The method according to claim 1, characterized in that: The detection instructions include a plurality of detection instructions, the target frequencies include a plurality of detection instructions, and the plurality of detection instructions correspond to the plurality of target frequencies one by one. The method further includes: The corresponding target frequency is determined according to the received detection instruction.

5. The method according to claim 1, characterized in that The determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature of the inner tube for refrigerant transmission in the air conditioner and / or the outer tube temperature of the outer tube for refrigerant transmission in the air conditioner includes any one of the following: determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference; Determining whether a refrigerant circulation failure occurs in the air conditioner according to the external tube temperature difference; Determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference and the outer tube temperature difference; The inner tube temperature difference is a difference between an initial inner tube temperature and a reference inner tube temperature, the initial inner tube temperature is the inner tube temperature at the initial moment when the compressor runs in the detection mode, and the reference inner tube temperature is the inner tube temperature when the duration of the compressor running in the detection mode reaches the duration threshold; The outer tube temperature difference is the difference between the reference outer tube temperature and the initial outer tube temperature, the initial outer tube temperature is the outer tube temperature at the initial moment when the compressor runs in the detection mode, and the reference outer tube temperature is the outer tube temperature when the duration of the compressor running in the detection mode reaches the duration threshold.

6. The method according to claim 5, characterized in that The determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference includes: If the absolute value of the inner tube temperature difference is greater than a first difference threshold, it is determined that the air conditioner is not short of fluorine; If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, it is determined that the air conditioner is moderately deficient in fluorine: If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the shut-off valve is faulty, wherein the first difference is greater than the second difference threshold.

7. The method according to claim 5, characterized in that The determining whether a refrigerant circulation failure occurs in the air conditioner according to the external tube temperature difference includes: If the absolute value of the outer tube temperature difference is greater than a third difference threshold, it is determined that the air conditioner is not short of fluorine; If the absolute value of the outer tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine: If the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the shut-off valve is faulty, wherein the third difference is greater than the fourth difference threshold.

8. The method according to claim 5, characterized in that The determining whether a refrigerant circulation failure occurs in the air conditioner according to the inner tube temperature difference and the outer tube temperature difference comprises: If the absolute value of the inner tube temperature difference is greater than the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the third difference threshold, it is determined that the air conditioner is not short of fluorine; If the absolute value of the inner tube temperature difference is greater than the second difference threshold and less than or equal to the first difference threshold, and the absolute value of the outer tube temperature difference is greater than the fourth difference threshold and less than or equal to the third difference threshold, it is determined that the air conditioner is moderately deficient in fluorine: If the absolute value of the inner tube temperature difference is less than or equal to the second difference threshold, and the absolute value of the outer tube temperature difference is less than or equal to the fourth difference threshold, it is determined that the air conditioner is severely deficient in fluorine and / or the stop valve is faulty.

9. The method according to claim 1, characterized in that: The method further comprises: If it is determined that a refrigerant circulation failure occurs in the air conditioner, a fault prompt message is output, wherein the fault prompt message includes fault type information; and / or, If it is determined that a refrigerant circulation failure occurs in the air conditioner, the air conditioner is controlled to be powered off.

10. An air conditioner fault detection device, characterized in that: The device comprises: A control module is configured to, in response to receiving a detection instruction, control the indoor fan, outdoor fan and compressor of the air conditioner to operate in a detection mode to perform cooling or heating, wherein in the detection mode, at least one of the following two is performed: controlling the indoor fan and the outdoor fan to operate at a target speed; controlling the compressor to operate at a target frequency; A first determination module is configured to determine whether a refrigerant circulation failure occurs in the air conditioner according to an inner tube temperature of an inner tube for refrigerant transmission in the air conditioner and / or an outer tube temperature of an outer tube for refrigerant transmission when the duration for which the compressor operates in the detection mode reaches a duration threshold; Wherein, when cooling is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner in the cooling mode, and the target frequency is greater than the frequency corresponding to the lowest temperature gear of the air conditioner in the cooling mode; When heating is performed in the detection mode, the target speed is less than the speed corresponding to the minimum wind speed gear of the air conditioner in the heating mode, and the target frequency is greater than the frequency corresponding to the maximum temperature gear of the air conditioner in the heating mode.

11. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 9 are implemented.

12. An air conditioner, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to implement the steps of the method according to any one of claims 1 to 9.

Images