Air conditioner stop valve blockage fault detection method and device and air conditioner

Abstract

The application provides an air conditioner stop valve blockage fault detection method and device and an air conditioner, which are applied to the field of air conditioner control. The method comprises the following steps: first, a target detection instruction for detecting the blockage fault of the stop valve of the air conditioner is received; then, in response to the target detection instruction, a first temperature parameter when the air conditioner operates in a cooling mode and a second temperature parameter when the air conditioner operates in a heating mode are collected, and whether the stop valve of the air conditioner has a blockage fault is judged according to the change of the first temperature parameter and the second temperature parameter. The air conditioner stop valve blockage fault detection method and device and the air conditioner provided by the application are used for detecting whether the stop valve is opened through a safety detection mechanism after the installation of the air conditioner is completed, and an alarm is given in the case that it is detected that the stop valve is not opened, so that the occurrence of a safety accident can be avoided.

Description

Technical Field

[0001] This application relates to the field of air conditioner control, and in particular to a method, device and air conditioner for detecting blockage faults in the shut-off valve of an air conditioner. Background Technology

[0002] As people's living standards continue to improve and the level of intelligence in home appliances continues to rise, smart home appliances are becoming increasingly popular. Users can use air conditioners to heat in winter to raise the indoor temperature, and they can also use air conditioners to cool in summer to lower the indoor temperature.

[0003] In related technologies, operators need to check whether the shut-off valve of the air conditioner is open when installing it, and manually open it if it is closed, to ensure the normal operation of the air conditioner. However, due to operator negligence, there are still cases where the shut-off valve is not open. Operating the air conditioner with the shut-off valve closed can easily lead to safety accidents.

[0004] Therefore, there is an urgent need for a safety detection mechanism to check whether the shut-off valve is open before using the air conditioner, in order to avoid safety accidents. Summary of the Invention

[0005] The purpose of this application is to provide a method, device, and air conditioner for detecting blockage faults in the shut-off valve of an air conditioner. After the air conditioner is installed, a safety detection mechanism is used to detect whether the shut-off valve is open, and an alarm is issued when the shut-off valve is detected to prevent safety accidents from occurring.

[0006] This application provides a method for detecting a blockage fault in an air conditioner's shut-off valve, including:

[0007] The system receives a target detection command to detect blockage faults in the shut-off valve of the air conditioner. The shut-off valve of the air conditioner includes a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor. In response to the target detection command, the system collects a first temperature parameter when the air conditioner is running in cooling mode and a second temperature parameter when the air conditioner is running in heating mode, and determines whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter. The first temperature parameter includes at least one of the following: compressor discharge temperature, outdoor unit coil temperature, and outdoor ambient temperature; the second temperature parameter includes at least one of the following: compressor discharge temperature, indoor unit discharge temperature, and indoor unit ambient temperature.

[0008] Optionally, receiving the target detection command for detecting blockage faults in the shut-off valve of the air conditioner includes: receiving the target detection command triggered by the operator when the installation or maintenance process of the air conditioner is completed; or, receiving the target detection command triggered by the opening signal when an opening signal is detected; wherein the opening signal is triggered when the outdoor unit casing is detected to be open.

[0009] Optionally, collecting the first temperature parameter of the air conditioner when it is running in cooling mode and the second temperature parameter of the air conditioner when it is running in heating mode includes: controlling the air conditioner to run in cooling mode for a first preset duration, and then controlling the air conditioner to run in heating mode for a second preset duration; or, controlling the air conditioner to run in heating mode for the second preset duration, and then controlling the air conditioner to run in cooling mode for the first preset duration.

[0010] Optionally, determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: determining that both the two-way shut-off valve and the three-way shut-off valve are blocked if the rate of increase of the compressor exhaust temperature indicated by the first temperature parameter exceeds the exhaust temperature rise threshold; or determining that both the two-way shut-off valve and the three-way shut-off valve are blocked if the rate of increase of the compressor exhaust temperature indicated by the second temperature parameter exceeds the exhaust temperature rise threshold.

[0011] Optionally, determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: acquiring the compressor operating power and the opening degree of the electronic expansion valve; determining a first standard heating rate of the outdoor unit's coil temperature under standard outdoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; determining a first adjustment coefficient based on a first ratio between the outdoor ambient temperature indicated by the first temperature parameter and the standard outdoor ambient temperature, and adjusting the first standard heating rate based on the first adjustment coefficient to obtain a first reference heating rate; and determining whether the heating rate of the outdoor unit's coil temperature indicated by the first temperature parameter is greater than a first threshold. In the following situations, it is determined that the two-way shut-off valve has a blockage fault; wherein, when the outdoor ambient temperature indicated by the first temperature parameter is greater than the standard outdoor ambient temperature, the first reference heating rate is greater than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is less than the standard outdoor ambient temperature, the first reference heating rate is less than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is equal to the standard outdoor ambient temperature, the first reference heating rate is equal to the first standard heating rate; the first threshold is the product of the first reference heating rate and a first preset multiple; the first preset multiple is a decimal greater than 1.

[0012] Optionally, determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: acquiring the compressor operating power and the opening degree of the electronic expansion valve; determining a second standard heating rate of the indoor unit's coil temperature under standard indoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; determining a second adjustment coefficient based on a second ratio between the indoor ambient temperature indicated by the second temperature parameter and the standard indoor ambient temperature, and adjusting the second standard heating rate based on the second adjustment coefficient to obtain a second reference heating rate; and determining whether the heating rate of the indoor unit's coil temperature indicated by the second temperature parameter is greater than a second threshold. In the following situations, it is determined that the two-way shut-off valve is blocked; wherein, when the indoor ambient temperature indicated by the second temperature parameter is greater than the standard indoor ambient temperature, the second reference heating rate is greater than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is less than the standard indoor ambient temperature, the second reference heating rate is less than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is equal to the standard indoor ambient temperature, the second reference heating rate is equal to the second standard heating rate; the second threshold is the product of the second reference heating rate and the second preset multiple; the second preset multiple is a decimal greater than 1.

[0013] Optionally, determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: determining that the three-way shut-off valve is blocked if the rate of increase of the indoor unit coil temperature indicated by the second temperature parameter is less than a preset temperature rise threshold.

[0014] Optionally, after determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter, the method further includes: if it is determined that the two-way shut-off valve and / or the three-way shut-off valve is blocked, generating target fault information and reminding the user based on the target fault information; wherein the target fault information is used to indicate the shut-off valve in the air conditioner that is malfunctioning.

[0015] This application also provides a device for detecting blockage faults in an air conditioner shut-off valve, comprising:

[0016] The instruction receiving module is used to receive a target detection instruction for detecting blockage faults in the shut-off valve of the air conditioner; the shut-off valve of the air conditioner includes: a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor; the data acquisition module is used to, in response to the target detection instruction, acquire a first temperature parameter of the air conditioner when it is running in cooling mode and a second temperature parameter of the air conditioner when it is running in heating mode; the fault detection module is used to determine whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter; wherein, the first temperature parameter includes at least one of the following: compressor discharge temperature, outdoor unit coil temperature, and outdoor ambient temperature; the second temperature parameter includes at least one of the following: compressor discharge temperature, indoor unit discharge temperature, and indoor unit ambient temperature.

[0017] Optionally, the instruction receiving module is specifically configured to receive the target detection instruction triggered by the operator when the installation or maintenance process of the air conditioner is completed; the instruction receiving module is also specifically configured to receive the target detection instruction triggered by the activation signal when an activation signal is detected; wherein, the activation signal is triggered when the outdoor unit casing is detected to be open.

[0018] Optionally, the device further includes: a control module; the control module is configured to control the air conditioner to run in cooling mode for a first preset time and then control the air conditioner to run in heating mode for a second preset time; the control module is also configured to control the air conditioner to run in heating mode for the second preset time and then control the air conditioner to run in cooling mode for the first preset time.

[0019] Optionally, the fault detection module is specifically used to determine that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked when the rate of increase of the compressor exhaust temperature indicated by the first temperature parameter exceeds the exhaust temperature rise threshold; the fault detection module is also specifically used to determine that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked when the rate of increase of the compressor exhaust temperature indicated by the second temperature parameter exceeds the exhaust temperature rise threshold.

[0020] Optionally, the device further includes: an acquisition module and a determination module; the acquisition module is used to acquire the compressor operating power and the opening degree of the electronic expansion valve; the determination module is used to determine a first standard heating rate of the outdoor unit's coil temperature under standard outdoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; the determination module is further used to determine a first adjustment coefficient based on a first ratio of the outdoor ambient temperature indicated by the first temperature parameter to the standard outdoor ambient temperature, and to adjust the first standard heating rate based on the first adjustment coefficient to obtain a first reference heating rate; the fault detection module is specifically used when the heating rate of the outdoor unit's coil temperature indicated by the first temperature parameter is greater than the first standard heating rate. Under the specified threshold conditions, a blockage fault is determined in the two-way shut-off valve; wherein, when the outdoor ambient temperature indicated by the first temperature parameter is greater than the standard outdoor ambient temperature, the first reference heating rate is greater than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is less than the standard outdoor ambient temperature, the first reference heating rate is less than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is equal to the standard outdoor ambient temperature, the first reference heating rate is equal to the first standard heating rate; the first threshold is the product of the first reference heating rate and a first preset multiple; the first preset multiple is a decimal greater than 1.

[0021] Optionally, the acquisition module is used to acquire the compressor operating power and the opening degree of the electronic expansion valve; the determination module is used to determine a second standard heating rate of the indoor unit's coil temperature under standard indoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; the determination module is further used to determine a second adjustment coefficient based on a second ratio between the indoor ambient temperature indicated by the second temperature parameter and the standard indoor ambient temperature, and to adjust the second standard heating rate based on the second adjustment coefficient to obtain a second reference heating rate; the fault detection module is specifically used to determine, when the heating rate of the indoor unit's coil temperature indicated by the second temperature parameter is greater than a second threshold, that... The two-way shut-off valve is experiencing a blockage; wherein, when the indoor ambient temperature indicated by the second temperature parameter is greater than the standard indoor ambient temperature, the second reference heating rate is greater than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is less than the standard indoor ambient temperature, the second reference heating rate is less than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is equal to the standard indoor ambient temperature, the second reference heating rate is equal to the second standard heating rate; the second threshold is the product of the second reference heating rate and a second preset multiple; the second preset multiple is a decimal greater than 1.

[0022] Optionally, the fault detection module is specifically used to determine that the three-way shut-off valve has a blockage fault when the heating rate of the indoor unit coil temperature indicated by the second temperature parameter is less than a preset heating threshold.

[0023] Optionally, the device further includes: an alarm module; the alarm module is used to generate target fault information and remind the user based on the target fault information when it is determined that the two-way shut-off valve and / or the three-way shut-off valve has a blockage fault; wherein the target fault information is used to indicate the shut-off valve that has a fault in the shut-off valve of the air conditioner.

[0024] This application also provides an air conditioner, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of any of the above-described air conditioner shut-off valve blockage fault detection methods.

[0025] This application also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the air conditioner shut-off valve blockage fault detection method as described above.

[0026] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of any of the above-described methods for detecting blockage faults in an air conditioner shut-off valve.

[0027] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the air conditioner shut-off valve blockage fault detection method as described above.

[0028] The air conditioner shut-off valve blockage fault detection method, device, and air conditioner provided in this application first receive a target detection command for detecting blockage faults in the shut-off valve of the air conditioner. The shut-off valve of the air conditioner includes: a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor. Then, in response to the target detection command, finally, a first temperature parameter of the air conditioner operating in cooling mode and a second temperature parameter of the air conditioner operating in heating mode are collected, and the shut-off valve of the air conditioner is determined to be blocked based on the changes in the first temperature parameter and the second temperature parameter. In this way, after the air conditioner is installed, a safety detection mechanism can be used to detect whether the shut-off valve is open, and an alarm is issued if the shut-off valve is not open to avoid safety accidents. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the air conditioner's operating principle provided in this application;

[0031] Figure 2 This is a schematic diagram of the installation position of the air conditioner shut-off valve provided in this application;

[0032] Figure 3 This is a flowchart illustrating the air conditioner shut-off valve blockage fault detection method provided in this application;

[0033] Figure 4 This is a schematic diagram of the air conditioner shut-off valve blockage fault detection device provided in this application;

[0034] Figure 5 This is a schematic diagram of the structure of the electronic device provided in this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] The operating principle of the air conditioner involved in the embodiments of this application is described in detail below:

[0038] like Figure 1 As shown, the compressor compresses the refrigerant and delivers it through pipes to the condenser. The high-temperature, high-pressure gaseous refrigerant releases heat in the condenser, transforming into a medium-temperature, high-pressure liquid refrigerant. Then, the medium-temperature, high-pressure liquid refrigerant is depressurized through a capillary tube (throttling unit) to become a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant is then delivered to the evaporator, where it evaporates into a gas, absorbing a large amount of heat during the evaporation process. Finally, the low-temperature, low-pressure gaseous refrigerant in the evaporator is delivered to the compressor to participate in the next cycle. When the air conditioner is cooling, the outdoor unit's heat exchanger acts as the condenser, and the indoor unit's heat exchanger acts as the evaporator; conversely, when the air conditioner is heating, the outdoor unit's heat exchanger acts as the evaporator, and the indoor unit's heat exchanger acts as the condenser.

[0039] like Figure 2The image shows two shut-off valves installed on the refrigerant lines of an air conditioner: a two-way shut-off valve located on the refrigerant line between the outdoor and indoor heat exchangers, and a three-way shut-off valve located on the refrigerant line between the indoor heat exchanger and the compressor. Air conditioning shut-off valves are a crucial component of the air conditioning system. Their primary function is to control the supply and flow of refrigerant to ensure the normal operation of the air conditioning system. When it is necessary to stop the air conditioner from operating, the shut-off valve cuts off the flow of refrigerant, preventing loss and leakage. Therefore, air conditioning shut-off valves play a vital role in ensuring the normal operation of the air conditioning system.

[0040] However, due to operator negligence or other human factors, the shut-off valve may fail to open in time after being closed. Therefore, a safety detection mechanism is needed to detect shut-off valve blockage before the air conditioner is put into operation in order to avoid safety accidents.

[0041] The method for detecting blockage of air conditioner shut-off valve provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0042] like Figure 3 As shown in the embodiment of this application, a method for detecting blockage faults in an air conditioner shut-off valve is provided. This method may include the following steps 301 to 302:

[0043] Step 301: Receive a target detection command for detecting blockage faults in the shut-off valve of the air conditioner.

[0044] For example, the target detection command can be automatically triggered by the system after detecting that the outdoor unit casing is open, or it can be manually triggered by the operator after performing maintenance on the air conditioner.

[0045] Specifically, step 301 above may include either step 301a or step 301b:

[0046] Step 301a: After the installation or maintenance process of the air conditioner is completed, receive the target detection command triggered by the operator.

[0047] For example, after an operator installs or maintains the air conditioner, they can manually trigger the system to perform a safety check. This safety check includes, but is not limited to, checking for blockages in the shut-off valve. In other words, checking for blockages in the shut-off valve can be a part of the safety check process.

[0048] Step 301b: If an activation signal is detected, receive the target detection command triggered by the activation signal.

[0049] The activation signal is triggered when the outdoor unit casing is detected to be open.

[0050] For example, if it is detected that the outdoor unit's casing was opened before the air conditioner was operated, then the status of the shut-off valve needs to be checked before the air conditioner is operated normally to prevent the air conditioner from operating when the shut-off valve is closed.

[0051] Under normal circumstances, the shut-off valve inside the outdoor unit is always open and will not be manually closed. However, when operators open the outdoor unit casing for inspection and maintenance, or during installation and adjustments, the shut-off valve may be closed and forgotten to be reopened. Therefore, the status detection of the shut-off valve can be triggered based on whether the outdoor unit casing is opened.

[0052] Step 302: In response to the target detection command, collect the first temperature parameter of the air conditioner when it is running in cooling mode and the second temperature parameter of the air conditioner when it is running in heating mode, and determine whether the shut-off valve of the air conditioner is blocked based on the changes of the first temperature parameter and the second temperature parameter.

[0053] The first temperature parameter includes at least one of the following: compressor discharge temperature, outdoor unit coil temperature, and outdoor ambient temperature; the second temperature parameter includes at least one of the following: compressor discharge temperature, indoor unit discharge temperature, and indoor unit ambient temperature.

[0054] It should be noted that all the temperature parameters in the first and second temperature parameters mentioned above are collected by the air conditioner during operation according to a preset sampling period, and include temperature parameters at multiple times.

[0055] Specifically, the step of acquiring temperature parameters in step 302 above may include the following steps 302a1 or 302a2:

[0056] Step 302a1: After controlling the air conditioner to run in cooling mode for a first preset time, control the air conditioner to run in heating mode for a second preset time.

[0057] Step 302a2: After controlling the air conditioner to run in heating mode for the second preset duration, control the air conditioner to run in cooling mode for the first preset duration.

[0058] For example, in the embodiments of this application, when detecting a fault in the shut-off valve, the cooling mode can be run first, followed by the heating mode, or the heating mode can be run first, followed by the heating mode.

[0059] For example, in this embodiment of the application, the specific shut-off valve that is blocked can be determined based on the change in temperature parameters by running the cooling mode and the heating mode sequentially.

[0060] It should be noted that the first and second preset durations mentioned above do not represent the required duration of operation in cooling and heating modes. Rather, they represent the maximum operating duration under the condition that no shut-off valve malfunction is detected. If a shut-off valve malfunction is detected, the operating mode will be switched directly or the detection process will be terminated.

[0061] For example, the air conditioner shut-off valve blockage fault detection method provided in this application embodiment can not only detect whether the shut-off valve has a blockage fault, but also more accurately detect which specific shut-off valve has a blockage fault.

[0062] For example, in the embodiments of this application, the blockage failure of the shut-off valve includes: both the two-way shut-off valve and the three-way shut-off valve are blocked simultaneously, only the two-way shut-off valve is blocked, and only the three-way shut-off valve is blocked.

[0063] For example, in the embodiments of this application, when the air conditioner is running in both cooling and heating modes, it can detect that both the two-way shut-off valve and the three-way shut-off valve are blocked simultaneously; when the air conditioner is running in cooling mode, it can detect that only the two-way shut-off valve is blocked; when the air conditioner is running in heating mode, it can detect either the two-way shut-off valve or only the three-way shut-off valve being blocked.

[0064] Specifically, in the case where both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked, step 302 above may include the following steps 302b1 or 302b2:

[0065] Step 302b1: If the rate of increase of the compressor exhaust temperature indicated by the first temperature parameter exceeds the exhaust temperature rise threshold, it is determined that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked.

[0066] Step 302b2: If the rate of increase of the compressor exhaust temperature indicated by the second temperature parameter exceeds the exhaust temperature rise threshold, it is determined that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked.

[0067] Understandably, when both the two-way and three-way shut-off valves are blocked simultaneously, the refrigerant flow in the refrigerant lines is extremely poor. This causes the compressor's discharge temperature to rise rapidly, reaching a very high temperature in a short time. Therefore, the rate of temperature rise in the discharge can be used to determine if both the two-way and three-way shut-off valves are blocked at the same time.

[0068] It should be noted that when both the two-way and three-way shut-off valves are detected to be blocked in one mode (e.g., cooling mode), a secondary verification can be performed using another mode (e.g., heating mode).

[0069] Specifically, in cooling mode, for cases where only the two-way shut-off valve is blocked, step 302 above may include steps 302c1 to 302c4:

[0070] Step 302c1: Obtain the compressor operating power and the opening degree of the electronic expansion valve.

[0071] For example, the compressor operating power and electronic expansion valve opening mentioned above are the compressor operating power and electronic expansion valve opening in refrigeration mode.

[0072] Step 302c2: Based on the compressor operating power and the opening degree of the electronic expansion valve, determine the first standard heating rate of the outdoor unit's coil temperature under standard outdoor ambient temperature.

[0073] For example, the first standard heating rate of the outdoor unit's coil temperature under standard outdoor ambient temperature can be matched and queried using a target relationship lookup table containing the corresponding heating rates of different compressor operating powers and different electronic expansion valve openings under standard ambient temperature. Based on this target relationship lookup table, the standard heating rates corresponding to the indoor and outdoor unit coil temperatures under standard ambient temperature can be retrieved for different compressor operating powers and different electronic expansion valve openings.

[0074] Step 302c3: Based on the first ratio of the outdoor ambient temperature indicated by the first temperature parameter to the standard outdoor ambient temperature, determine the first adjustment coefficient, and adjust the first standard heating rate based on the first adjustment coefficient to obtain the first reference heating rate.

[0075] Wherein, when the outdoor ambient temperature indicated by the first temperature parameter is greater than the standard outdoor ambient temperature, the first reference heating rate is greater than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is less than the standard outdoor ambient temperature, the first reference heating rate is less than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is equal to the standard outdoor ambient temperature, the first reference heating rate is equal to the first standard heating rate; the first threshold is the product of the first reference heating rate and a first preset multiple; the first preset multiple is a decimal greater than 1.

[0076] For example, after obtaining the standard heating rate, the standard heating rate can be adjusted based on the ratio of the current outdoor ambient temperature to the standard outdoor ambient temperature to obtain a reference heating rate at the current outdoor ambient temperature.

[0077] Step 302c4: If the rate of increase of the outdoor unit coil temperature indicated by the first temperature parameter is greater than the first threshold, it is determined that the two-way shut-off valve has a blockage fault.

[0078] For example, after obtaining the standard heating rate of the outdoor unit coil temperature under the current outdoor ambient temperature, the actual heating rate of the outdoor unit coil temperature can be compared with the standard heating rate to determine whether the two-way shut-off valve has malfunctioned.

[0079] For example, when the air conditioner is running in cooling mode, the temperature of the outdoor heat exchanger will rise. Based on this, the change in the coil temperature of the outdoor heat exchanger can be used to determine whether the two-way shut-off valve is blocked.

[0080] It is understandable that when the two-way shut-off valve is blocked, the refrigerant cannot flow directly between the two heat exchangers (it can temporarily flow between the two heat exchangers through the compressor). Therefore, the condenser will heat up rapidly, while the evaporator temperature will not change significantly.

[0081] It should be noted that when both the two-way shut-off valve and the three-way shut-off valve are detected to have a toxin malfunction, it is not necessary to determine whether only the two-way shut-off valve or only the three-way shut-off valve is blocked. That is, steps 302c1 to 302c4 are performed after it has been determined in steps 302b1 and 302b2 that neither the two-way shut-off valve nor the three-way shut-off valve is blocked at the same time.

[0082] Specifically, in heating mode, for cases where only the two-way shut-off valve is blocked, step 302 above may include steps 302d1 to 302d4:

[0083] Step 302d1: Obtain the compressor operating power and the opening degree of the electronic expansion valve.

[0084] For example, the compressor operating power and electronic expansion valve opening mentioned above are the compressor operating power and electronic expansion valve opening in heating mode.

[0085] Step 302d2: Based on the compressor operating power and the opening degree of the electronic expansion valve, determine the second standard heating rate of the indoor unit's coil temperature under standard indoor ambient temperature.

[0086] For example, the second standard heating rate of the indoor unit's coil temperature under standard indoor ambient temperature can be matched and queried using a target relationship lookup table containing different compressor operating powers and different electronic expansion valve openings at standard ambient temperature. Based on this target relationship lookup table, the standard heating rate of the indoor unit's coil temperature and corresponding indoor unit coil temperature under standard ambient temperature can be found for different compressor operating powers and different electronic expansion valve openings.

[0087] Step 302d3: Based on the second ratio of the indoor ambient temperature indicated by the second temperature parameter to the standard indoor ambient temperature, determine the second adjustment coefficient, and adjust the second standard heating rate based on the second adjustment coefficient to obtain the second reference heating rate.

[0088] Wherein, when the indoor ambient temperature indicated by the second temperature parameter is greater than the standard indoor ambient temperature, the second reference heating rate is greater than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is less than the standard indoor ambient temperature, the second reference heating rate is less than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is equal to the standard indoor ambient temperature, the second reference heating rate is equal to the second standard heating rate; the second threshold is the product of the second reference heating rate and the second preset multiple; the second preset multiple is a decimal greater than 1.

[0089] For example, after obtaining the standard heating rate, the standard heating rate can be adjusted based on the ratio of the current indoor ambient temperature to the standard indoor ambient temperature to obtain a reference heating rate at the current indoor ambient temperature.

[0090] Step 302d4: If the heating rate of the indoor unit coil temperature indicated by the second temperature parameter is greater than the second threshold, it is determined that the two-way shut-off valve has a blockage fault.

[0091] For example, after obtaining the standard heating rate of the indoor unit coil temperature under the current indoor ambient temperature, the actual heating rate of the indoor unit coil temperature can be compared with the standard heating rate to determine whether the two-way shut-off valve has malfunctioned.

[0092] For example, when the air conditioner is running in heating mode, the temperature of the indoor heat exchanger will rise. Based on this, the change in the coil temperature of the indoor heat exchanger can be used to determine whether the two-way shut-off valve is blocked.

[0093] It should be noted that when both the two-way shut-off valve and the three-way shut-off valve are detected to have a toxin malfunction, it is not necessary to determine whether only the two-way shut-off valve or only the three-way shut-off valve has a blockage malfunction. That is, steps 302d1 to 302d4 above are performed after it has been determined in steps 302b1 and 302b2 that neither the two-way shut-off valve nor the three-way shut-off valve has a blockage malfunction.

[0094] Specifically, in heating mode, for cases where only the three-way shut-off valve is blocked, step 302 above may further include the following step 302e:

[0095] Step 302e: If the rate of increase of the indoor unit coil temperature indicated by the second temperature parameter is less than the preset temperature threshold, it is determined that the three-way shut-off valve has a blockage fault.

[0096] It is understandable that when only the three-way shut-off valve malfunctions, the refrigerant output by the compressor cannot enter the indoor heat exchanger, which will cause the indoor heat exchanger to not heat up in heating mode. Therefore, the rate of temperature rise of the indoor heat exchanger coil in heating mode can be used to determine whether the three-way shut-off valve is blocked.

[0097] It should be noted that, unlike the situation where both the two-way and three-way shut-off valves are blocked at the same time, when only the three-way shut-off valve is blocked, the low-temperature refrigerant in the outdoor heat exchanger will still enter the compressor within a certain period of time, and the compressor's exhaust temperature will not rise rapidly.

[0098] Optionally, in this embodiment of the application, based on the judgment of the blockage fault of the shut-off valve, if it is determined that the shut-off valve has a blockage fault, the operator can be promptly reminded of the specific fault situation.

[0099] For example, after step 302 above, the air conditioner shut-off valve blockage fault detection method provided in this application embodiment may further include the following step 303:

[0100] Step 303: If it is determined that the two-way shut-off valve and / or the three-way shut-off valve is blocked, generate target fault information and remind the user based on the target fault information.

[0101] The target fault information is used to indicate a faulty shut-off valve in the air conditioner.

[0102] For example, if the air conditioner detects a blockage in the shut-off valve through the above steps, it can promptly remind the operator which shut-off valve is blocked, so that the operator can open the closed shut-off valve in time to avoid safety accidents.

[0103] The air conditioner shut-off valve blockage fault detection method provided in this application embodiment first receives a target detection command for detecting blockage faults in the air conditioner's shut-off valve. The air conditioner's shut-off valve includes: a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor. Then, in response to the target detection command, a first temperature parameter of the air conditioner operating in cooling mode and a second temperature parameter of the air conditioner operating in heating mode are collected. Based on the changes in the first and second temperature parameters, it is determined whether the air conditioner's shut-off valve is blocked. In this way, after the air conditioner is installed, a safety detection mechanism can be used to detect whether the shut-off valve is open, and an alarm is issued if the shut-off valve is not open, so as to avoid the occurrence of safety accidents.

[0104] It should be noted that the air conditioner shut-off valve blockage fault detection method provided in this application embodiment can be executed by an air conditioner shut-off valve blockage fault detection device, or a controller in the air conditioner shut-off valve blockage fault detection device for executing the air conditioner shut-off valve blockage fault detection method. This application embodiment uses the air conditioner shut-off valve blockage fault detection device executing the air conditioner shut-off valve blockage fault detection method as an example to illustrate the air conditioner shut-off valve blockage fault detection device provided in this application embodiment.

[0105] It should be noted that, in the embodiments of this application, the methods for detecting air conditioner shut-off valve blockage shown in the accompanying drawings are all illustrated by way of example with reference to one of the accompanying drawings in the embodiments of this application. In specific implementation, the methods for detecting air conditioner shut-off valve blockage shown in the accompanying drawings of the above methods can also be implemented in conjunction with any other accompanying drawings shown in the above embodiments, which will not be elaborated here.

[0106] The following describes the air conditioner shut-off valve blockage fault detection device provided in this application. The description below can be referred to in correspondence with the air conditioner shut-off valve blockage fault detection method described above.

[0107] Figure 4 This is a schematic diagram of the structure of an air conditioner shut-off valve blockage fault detection device provided in an embodiment of this application, as shown below. Figure 4 As shown, it specifically includes:

[0108] The instruction receiving module 401 is used to receive a target detection instruction for detecting blockage faults in the shut-off valve of the air conditioner; the shut-off valve of the air conditioner includes: a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor; the data acquisition module 402 is used to, in response to the target detection instruction, acquire a first temperature parameter of the air conditioner when it is running in cooling mode and a second temperature parameter of the air conditioner when it is running in heating mode; the fault detection module 403 is used to determine whether the shut-off valve of the air conditioner has a blockage fault based on the changes in the first temperature parameter and the second temperature parameter; wherein, the first temperature parameter includes at least one of the following: compressor discharge temperature, outdoor unit coil temperature, and outdoor ambient temperature; the second temperature parameter includes at least one of the following: compressor discharge temperature, indoor unit discharge temperature, and indoor unit ambient temperature.

[0109] Optionally, the instruction receiving module 401 is specifically used to receive the target detection instruction triggered by the operator when the installation or maintenance process of the air conditioner is completed; the instruction receiving module 401 is also specifically used to receive the target detection instruction triggered by the opening signal when an opening signal is detected; wherein, the opening signal is triggered when the outdoor unit casing is detected to be open.

[0110] Optionally, the device further includes: a control module 404; the control module 404 is configured to control the air conditioner to run in cooling mode for a first preset time and then control the air conditioner to run in heating mode for a second preset time; the control module 404 is also configured to control the air conditioner to run in heating mode for the second preset time and then control the air conditioner to run in cooling mode for the first preset time.

[0111] Optionally, the fault detection module 403 is specifically used to determine that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked when the rate of increase of the compressor exhaust temperature indicated by the first temperature parameter exceeds the exhaust temperature rise threshold; the fault detection module 403 is also specifically used to determine that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked when the rate of increase of the compressor exhaust temperature indicated by the second temperature parameter exceeds the exhaust temperature rise threshold.

[0112] Optionally, the device further includes: an acquisition module and a determination module; the acquisition module is used to acquire the compressor operating power and the opening degree of the electronic expansion valve; the determination module is used to determine a first standard heating rate of the outdoor unit coil temperature under standard outdoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; the determination module is further used to determine a first adjustment coefficient based on a first ratio of the outdoor ambient temperature indicated by the first temperature parameter to the standard outdoor ambient temperature, and to adjust the first standard heating rate based on the first adjustment coefficient to obtain a first reference heating rate; the fault detection module 403 is specifically used to detect when the heating rate of the outdoor unit coil temperature indicated by the first temperature parameter is greater than the first standard heating rate. Under a certain threshold condition, it is determined that the two-way shut-off valve has a blockage fault; wherein, when the outdoor ambient temperature indicated by the first temperature parameter is greater than the standard outdoor ambient temperature, the first reference heating rate is greater than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is less than the standard outdoor ambient temperature, the first reference heating rate is less than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is equal to the standard outdoor ambient temperature, the first reference heating rate is equal to the first standard heating rate; the first threshold is the product of the first reference heating rate and a first preset multiple; the first preset multiple is a decimal greater than 1.

[0113] Optionally, the acquisition module is used to acquire the compressor operating power and the opening degree of the electronic expansion valve; the determination module is used to determine a second standard heating rate of the indoor unit's coil temperature under standard indoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; the determination module is further used to determine a second adjustment coefficient based on a second ratio between the indoor ambient temperature indicated by the second temperature parameter and the standard indoor ambient temperature, and to adjust the second standard heating rate based on the second adjustment coefficient to obtain a second reference heating rate; the fault detection module 403 is specifically used to determine if the heating rate of the indoor unit's coil temperature indicated by the second temperature parameter is greater than a second threshold. The two-way shut-off valve is deemed to have a blockage fault; wherein, when the indoor ambient temperature indicated by the second temperature parameter is greater than the standard indoor ambient temperature, the second reference heating rate is greater than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is less than the standard indoor ambient temperature, the second reference heating rate is less than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is equal to the standard indoor ambient temperature, the second reference heating rate is equal to the second standard heating rate; the second threshold is the product of the second reference heating rate and a second preset multiple; the second preset multiple is a decimal greater than 1.

[0114] Optionally, the fault detection module 403 is specifically used to determine that the three-way shut-off valve has a blockage fault when the heating rate of the indoor unit coil temperature indicated by the second temperature parameter is less than a preset heating threshold.

[0115] Optionally, the device further includes: an alarm module; the alarm module is used to generate target fault information and remind the user based on the target fault information when it is determined that the two-way shut-off valve and / or the three-way shut-off valve has a blockage fault; wherein the target fault information is used to indicate the shut-off valve that has a fault in the shut-off valve of the air conditioner.

[0116] The air conditioner shut-off valve blockage fault detection device provided in this application first receives a target detection command to detect blockage faults in the shut-off valve of the air conditioner. The shut-off valve of the air conditioner includes a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor. Then, in response to the target detection command, it collects a first temperature parameter when the air conditioner is running in cooling mode and a second temperature parameter when the air conditioner is running in heating mode. Finally, based on the changes in the first temperature parameter and the second temperature parameter, it determines whether the shut-off valve of the air conditioner is blocked. In this way, after the air conditioner is installed, a safety detection mechanism can be used to detect whether the shut-off valve is open, and an alarm can be issued if the shut-off valve is not open to avoid safety accidents.

[0117] Figure 5 This example illustrates a schematic diagram of the physical structure of an electronic device, which can be the aforementioned air conditioner, such as... Figure 5 As shown, the electronic device may include a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute an air conditioner shut-off valve blockage fault detection method. The method includes: firstly, receiving a target detection instruction for detecting blockage faults in the air conditioner's shut-off valve; then, in response to the target detection instruction, acquiring a first temperature parameter when the air conditioner is running in cooling mode and a second temperature parameter when the air conditioner is running in heating mode; finally, determining whether the air conditioner's shut-off valve has a blockage fault based on the changes in the first and second temperature parameters.

[0118] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0119] On the other hand, this application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the air conditioner shut-off valve blockage fault detection method provided by the above methods. The method includes: firstly receiving a target detection instruction for detecting blockage faults in the shut-off valve of the air conditioner; then, in response to the target detection instruction, acquiring a first temperature parameter when the air conditioner is running in cooling mode and a second temperature parameter when the air conditioner is running in heating mode; and finally, determining whether the shut-off valve of the air conditioner has a blockage fault based on the changes in the first temperature parameter and the second temperature parameter.

[0120] In another aspect, this application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, is implemented to perform the aforementioned air conditioner shut-off valve blockage fault detection methods. The method includes: firstly receiving a target detection command for detecting blockage faults in the shut-off valve of an air conditioner; then, in response to the target detection command, acquiring a first temperature parameter of the air conditioner when it is running in cooling mode and a second temperature parameter of the air conditioner when it is running in heating mode; and finally, determining whether the shut-off valve of the air conditioner has a blockage fault based on the changes in the first temperature parameter and the second temperature parameter.

[0121] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0122] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for detecting blockage in an air conditioner's shut-off valve, characterized in that, Applied to air conditioners, the method includes: Receive a target detection command for detecting blockage faults in the shut-off valve of the air conditioner; the shut-off valve of the air conditioner includes: a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor. In response to the target detection command, the first temperature parameter of the air conditioner when it is running in cooling mode and the second temperature parameter of the air conditioner when it is running in heating mode are collected, and the shut-off valve of the air conditioner is determined to be blocked based on the changes of the first temperature parameter and the second temperature parameter. The first temperature parameter includes at least one of the following: compressor discharge temperature, outdoor unit coil temperature, and outdoor ambient temperature; the second temperature parameter includes at least one of the following: compressor discharge temperature, indoor unit discharge temperature, and indoor unit ambient temperature. The process of collecting the first temperature parameter of the air conditioner when it is running in cooling mode and the second temperature parameter of the air conditioner when it is running in heating mode includes: After controlling the air conditioner to run in cooling mode for a first preset time, the air conditioner is then controlled to run in heating mode for a second preset time; or, after controlling the air conditioner to run in heating mode for the second preset time, the air conditioner is then controlled to run in cooling mode for the first preset time. The step of determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: Obtain the compressor operating power and the opening degree of the electronic expansion valve; Based on the compressor's operating power and the opening of the air conditioner's electronic expansion valve, determine the first standard heating rate of the outdoor unit's coil temperature under standard outdoor ambient temperature; Based on the first ratio of the outdoor ambient temperature indicated by the first temperature parameter to the standard outdoor ambient temperature, a first adjustment coefficient is determined, and the first standard heating rate is adjusted based on the first adjustment coefficient to obtain a first reference heating rate. If the rate of increase of the outdoor unit coil temperature indicated by the first temperature parameter is greater than the first threshold, it is determined that the two-way shut-off valve is blocked. Wherein, when the outdoor ambient temperature indicated by the first temperature parameter is greater than the standard outdoor ambient temperature, the first reference heating rate is greater than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is less than the standard outdoor ambient temperature, the first reference heating rate is less than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is equal to the standard outdoor ambient temperature, the first reference heating rate is equal to the first standard heating rate; the first threshold is the product of the first reference heating rate and a first preset multiple; the first preset multiple is a decimal greater than 1.

2. The method according to claim 1, characterized in that, The receiving of the target detection command for detecting blockage faults in the shut-off valve of the air conditioner includes: Upon completion of the installation or maintenance process of the air conditioner, the target detection command triggered by the operator is received. or, Upon detecting an enable signal, receive the target detection command triggered by the enable signal; The activation signal is triggered when the outdoor unit casing is detected to be open.

3. The method according to claim 1, characterized in that, The step of determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: If the rate of increase of the compressor exhaust temperature indicated by the first temperature parameter exceeds the exhaust temperature rise threshold, it is determined that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked. or, If the rate of increase of the compressor exhaust temperature indicated by the second temperature parameter exceeds the exhaust temperature rise threshold, it is determined that both the two-way shut-off valve and the three-way shut-off valve are simultaneously blocked.

4. The method according to claim 1, characterized in that, The step of determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: Obtain the compressor operating power and the opening degree of the electronic expansion valve; Based on the compressor operating power and the opening degree of the electronic expansion valve, a second standard heating rate for the indoor unit's coil temperature is determined under standard indoor ambient temperature. Based on the second ratio of the indoor ambient temperature indicated by the second temperature parameter to the standard indoor ambient temperature, a second adjustment coefficient is determined, and the second standard heating rate is adjusted based on the second adjustment coefficient to obtain a second reference heating rate. If the rate of increase of the indoor unit coil temperature indicated by the second temperature parameter is greater than the second threshold, it is determined that the two-way shut-off valve is blocked. Wherein, when the indoor ambient temperature indicated by the second temperature parameter is greater than the standard indoor ambient temperature, the second reference heating rate is greater than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is less than the standard indoor ambient temperature, the second reference heating rate is less than the second standard heating rate; when the indoor ambient temperature indicated by the second temperature parameter is equal to the standard indoor ambient temperature, the second reference heating rate is equal to the second standard heating rate; the second threshold is the product of the second reference heating rate and the second preset multiple; the second preset multiple is a decimal greater than 1.

5. The method according to claim 1 or 4, characterized in that, The step of determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter includes: If the rate of increase of the indoor unit coil temperature indicated by the second temperature parameter is less than the preset temperature threshold, it is determined that the three-way shut-off valve is blocked.

6. The method according to claim 1, characterized in that, After determining whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter, the method further includes: If it is determined that the two-way shut-off valve and / or the three-way shut-off valve is blocked, target fault information is generated, and the user is reminded based on the target fault information; The target fault information is used to indicate a faulty shut-off valve in the air conditioner.

7. A device for detecting blockage faults in an air conditioner's shut-off valve, characterized in that, The device includes: The instruction receiving module is used to receive a target detection instruction for detecting blockage faults in the shut-off valve of the air conditioner; the shut-off valve of the air conditioner includes: a two-way shut-off valve installed on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a three-way shut-off valve installed on the refrigerant pipeline between the indoor heat exchanger and the compressor. The data acquisition module is used to collect the first temperature parameter of the air conditioner when it is running in cooling mode and the second temperature parameter of the air conditioner when it is running in heating mode in response to the target detection command. The fault detection module is used to determine whether the shut-off valve of the air conditioner is blocked based on the changes in the first temperature parameter and the second temperature parameter. The first temperature parameter includes at least one of the following: compressor discharge temperature, outdoor unit coil temperature, and outdoor ambient temperature; the second temperature parameter includes at least one of the following: compressor discharge temperature, indoor unit discharge temperature, and indoor unit ambient temperature. The device further includes: a control module; the control module is used to control the air conditioner to run in cooling mode for a first preset time and then control the air conditioner to run in heating mode for a second preset time; the control module is also used to control the air conditioner to run in heating mode for the second preset time and then control the air conditioner to run in cooling mode for the first preset time. The device further includes: an acquisition module and a determination module; the acquisition module is used to acquire the compressor operating power and the opening degree of the electronic expansion valve; the determination module is used to determine a first standard heating rate of the outdoor unit's coil temperature under standard outdoor ambient temperature based on the compressor operating power and the opening degree of the electronic expansion valve; the determination module is further used to determine a first adjustment coefficient based on a first ratio between the outdoor ambient temperature indicated by the first temperature parameter and the standard outdoor ambient temperature, and to adjust the first standard heating rate based on the first adjustment coefficient to obtain a first reference heating rate; the fault detection module is specifically used when the heating rate of the outdoor unit's coil temperature indicated by the first temperature parameter exceeds a first threshold. In the following cases, it is determined that the two-way shut-off valve has a blockage fault; wherein, when the outdoor ambient temperature indicated by the first temperature parameter is greater than the standard outdoor ambient temperature, the first reference heating rate is greater than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is less than the standard outdoor ambient temperature, the first reference heating rate is less than the first standard heating rate; when the outdoor ambient temperature indicated by the first temperature parameter is equal to the standard outdoor ambient temperature, the first reference heating rate is equal to the first standard heating rate; the first threshold is the product of the first reference heating rate and a first preset multiple; the first preset multiple is a decimal greater than 1.

8. An air conditioner, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the air conditioner shut-off valve blockage fault detection method as described in any one of claims 1 to 6.

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