Refrigerator and stall fault detection method, device and storage medium for electric valve thereof

Abstract

The application provides a refrigerator and a stall fault detection method, device and storage medium of an electric valve thereof, the electric valve is arranged between an outlet of a condenser of the refrigerator and an inlet of a capillary tube of the refrigerator; the stall fault detection method comprises: controlling the electric valve to switch from a first state to a second state; acquiring an inlet temperature, a valve-in temperature and an outlet temperature of the electric valve; if the first state is an open state and the second state is a closed state, a first judgment condition is acquired; according to the first judgment condition, the inlet temperature, the valve-in temperature and the outlet temperature, it is judged whether the electric valve occurs stall fault; if the first state is a closed state and the second state is an open state, a second judgment condition is acquired; according to the second judgment condition, the inlet temperature, the valve-in temperature and the outlet temperature, it is judged whether the electric valve occurs stall fault.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, specifically to a method, device, and storage medium for detecting stall faults in a refrigerator and its electric valve. Background Technology

[0002] Refrigerators are common household appliances. The electric valve is a common refrigerant regulating component in the refrigerator's refrigeration system. Because the high-temperature, low-pressure refrigerant flows through the electric valve, the resistance of its internal components can easily increase, leading to the electric valve becoming blocked. In current technology, electric valves are difficult to detect; blocking can only be determined after disassembling the refrigerator. Summary of the Invention

[0003] This application provides a method, apparatus, and storage medium for detecting stall faults in refrigerators and their electric valves, aiming to solve the technical problem of difficulty in detecting stall faults in electric valves in the prior art.

[0004] A first aspect includes a method for detecting a stall fault in an electric valve of a refrigerator, wherein the electric valve is located between the outlet of the refrigerator's condenser and the inlet of the refrigerator's capillary tube; the method for detecting the stall fault includes:

[0005] Control the electric valve to switch from the first state to the second state;

[0006] Obtain the inlet temperature, valve internal temperature, and outlet temperature of the electric valve;

[0007] If the first state is open and the second state is closed, then the first judgment condition is obtained;

[0008] Based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature, determine whether the electric valve has experienced a stall fault;

[0009] If the first state is closed and the second state is open, then obtain the second judgment condition;

[0010] Based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature, it is determined whether the electric valve has experienced a stall fault.

[0011] Optionally, determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0012] If the inlet temperature, the valve internal temperature, and the outlet temperature are the same after the electric valve switches from the first state to the second state and runs for a first preset time, then it is determined that the electric valve has stalled.

[0013] Optionally, determining that the electric valve is stalled after the electric valve switches from the first state to the second state and operates for a first preset time, and the inlet temperature, the valve internal temperature, and the outlet temperature are the same, includes:

[0014] If, when the electric valve switches from the first state to the second state, the temperature inside the valve rises first, and after running for the first preset time, the inlet temperature, the temperature inside the valve, and the outlet temperature are the same, then it is determined that the electric valve has stalled.

[0015] Optionally, determining whether the electric valve has experienced a stall fault based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0016] If the inlet temperature, the valve internal temperature, and the outlet temperature are different after the electric valve switches from the first state to the second state and runs for a second preset time, it is determined that the electric valve has stalled.

[0017] Optionally, determining that the electric valve is stalled if, after the electric valve switches from the first state to the second state and operates for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are different includes:

[0018] If the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then the electric valve is determined to be stalled.

[0019] Optionally, determining that the electric valve is stalled if, after the electric valve switches from the first state to the second state and operates for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are different includes:

[0020] If, when the electric valve switches from the first state to the second state, the valve internal temperature rises to a preset temperature value within a third preset time period, and after a second preset time period, the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then it is determined that the electric valve has stalled; wherein, the third preset time period is shorter than the second preset time period.

[0021] Optionally, determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0022] If, after the electric valve switches from the first state to the second state and operates for a first preset time, the inlet temperature is less than the valve internal temperature and the outlet temperature, then it is determined that the electric valve did not stall when closed.

[0023] and / or

[0024] Based on the second judgment condition, the determination of whether the electric valve has experienced a stall fault includes the following: inlet temperature, valve internal temperature, and outlet temperature.

[0025] If, after the electric valve switches from the first state to the second state and runs for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are the same, then it is determined that the electric valve did not stall when it was opened.

[0026] Secondly, this application also proposes a stall fault detection device for an electric valve in a refrigerator, wherein the electric valve is located between the outlet of the refrigerator's condenser and the inlet of the refrigerator's capillary tube; the stall fault detection device includes:

[0027] The control module controls the electric valve to switch from the first state to the second state;

[0028] The acquisition module acquires the inlet temperature, valve internal temperature, and outlet temperature of the electric valve.

[0029] The acquisition module is configured to acquire a first judgment condition if the first state is an open state and the second state is a closed state; and to acquire a second judgment condition if the first state is a closed state and the second state is an open state.

[0030] The judgment module is configured to determine whether the electric valve has a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature; and to determine whether the electric valve has a stall fault based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature.

[0031] Thirdly, embodiments of this application also propose a refrigerator, including a controller, the controller being used to execute the stall fault detection method as described above or a stall fault detection device including the electric valve of the refrigerator as described above.

[0032] Fourthly, embodiments of this application also propose a computer storage medium storing a computer program, which is loaded by a processor to execute the steps in the stall fault detection method described above.

[0033] In the technical solution of this application embodiment, by controlling the electric valve to perform switching action or closing operation, and based on the first judgment condition corresponding to the switching action or the second judgment condition corresponding to the closing operation, and in combination with the inlet temperature, valve internal temperature and outlet temperature, it is determined whether the electric valve has a stall fault when performing the switching action or the closing operation. This is a non-invasive detection method that does not require disassembling refrigerator components, reducing detection costs and repair difficulty. At the same time, it can quickly locate the stall fault of the electric valve, which helps to improve the cooling efficiency and service life of the compressor and the reliability of the refrigerator. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the refrigeration system of the refrigerator provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the structure of the electric valve in the refrigerator provided in the embodiments of this application;

[0037] Figure 3 This is a flowchart illustrating the method for detecting the stall fault of the electric valve of a refrigerator provided in the embodiments of this application;

[0038] Figure 4 yes Figure 3 A schematic diagram of a sub-step in step S400;

[0039] Figure 5 yes Figure 4 A schematic diagram of a sub-step in step S410;

[0040] Figure 6 yes Figure 3 A schematic diagram of a sub-step in step S500;

[0041] Figure 7 yes Figure 6 A schematic diagram of a sub-step in step S510;

[0042] Figure 8 yes Figure 7 A schematic diagram of a sub-step in step S511. Detailed Implementation

[0043] The technical solutions of the embodiments 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 the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0046] like Figure 1As shown in the illustration, this application provides a refrigerator refrigeration system, including a compressor 10, a condenser 20, an electric valve 30, a capillary tube 40, and an evaporator 50. The compressor 10, condenser 20, electric valve 30, capillary tube 40, and evaporator 50 are connected sequentially. Refrigerant, after exiting the compressor, passes sequentially through the condenser, electric valve, capillary tube, and evaporator, entering the compressor from the compressor inlet to complete one cycle. The electric valve is located between the outlet of the condenser and the inlet of the capillary tube. The electric valve is used to regulate the flow rate of the refrigerant in the refrigeration system to adjust the cooling capacity.

[0047] When adjusting flow, an electric valve needs to switch from one state to another. This could be from closed to open, open to closed, or from an intermediate state to another. When the electric valve is stalled, it struggles to switch between states, causing the refrigerator to fail to perform corresponding functional changes, such as adjusting cooling capacity, failing to cool, or continuously cooling. Therefore, it is necessary to test for stalling in the electric valve.

[0048] This application provides a method for detecting a stall fault in the electric valve of a refrigerator. This stall fault detection method is executed by a controller within the refrigerator. Figure 2 As shown, the electric valve includes an inlet, an inner valve portion, and an outlet, corresponding to an inlet temperature T31, an inner valve temperature T32, and an outlet temperature T33, respectively. The inlet, inner valve, and outlet temperatures are measured by temperature sensors, which can be either thermocouples or resistance temperature sensors. That is, temperature sensors are provided at the inlet, inner valve portion, and outlet portion to detect the inlet, inner valve, and outlet temperatures, respectively.

[0049] like Figure 3 As shown in the embodiments of this application, a method for detecting a stall fault in the electric valve of a refrigerator is also proposed. The stall fault detection method includes:

[0050] S100, control the electric valve to switch from the first state to the second state;

[0051] S200, obtain the inlet temperature, valve internal temperature and outlet temperature of the electric valve;

[0052] S301, if the first state is the open state and the second state is the closed state, then obtain the first judgment condition;

[0053] S400, based on the first judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature, determine whether the electric valve has a stall fault;

[0054] S302, if the first state is closed and the second state is open, then obtain the second judgment condition;

[0055] S500, based on the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature, determine whether the electric valve has a stall fault.

[0056] In the technical solution of this application embodiment, by controlling the electric valve to perform switching action or closing operation, and based on the first judgment condition corresponding to the switching action or the second judgment condition corresponding to the closing operation, and in combination with the inlet temperature, valve internal temperature and outlet temperature, it is determined whether the electric valve has a stall fault when performing the switching action or the closing operation. This is a non-invasive detection method that does not require disassembling refrigerator components, reducing detection costs and repair difficulty. At the same time, it can quickly locate the stall fault of the electric valve, which helps to improve the cooling efficiency and service life of the compressor and the reliability of the refrigerator.

[0057] It should be noted that the detection can be that the controller executes the stall fault detection method every time the refrigerator's electric valve switches from the first state to the second state; or the controller executes the stall fault detection method once when the refrigerator's electric valve switches from the first state to the second state a preset number of times; or the controller starts executing the stall fault detection method in response to an externally input detection command.

[0058] In some embodiments, when the electric valve experiences a stall fault, the refrigerator will notify the user in a certain way, such as through an indicator light on the refrigerator panel, text, or by sending a warning message to the user's app. Alternatively, when a repair technician inputs a test command, if the electric valve experiences a stall fault, the refrigerator will send the test results to the equipment used by the repair technician in at least one of the following forms: text, voice, light, or image.

[0059] In some embodiments of this application, the open state can be a fully open state; that is, when executing the stall fault detection method, the electric valve switches from a closed state to a fully open state, or from a fully open state to a closed state, so that the electric valve can detect whether it is stalled during the entire switching process. In other embodiments, the open state can also be an intermediate state between the closed state and the fully open state, such as a half-open state.

[0060] like Figure 4 As shown, as an optional implementation of the above embodiment, determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0061] S410, if the inlet temperature, the valve internal temperature, and the outlet temperature are the same after the electric valve switches from the first state to the second state and runs for a first preset time, then it is determined that the electric valve has stalled.

[0062] In this embodiment, if the electric valve switches from the open state to the closed state, and the inlet temperature, valve internal temperature, and outlet temperature are the same, then the inlet, valve internal temperature, and outlet of the electric valve are connected. At this time, the electric valve is in the conducting state rather than the closed state, and therefore the electric valve is stalled.

[0063] It should be noted that, in the technical solution of this application embodiment, the same inlet temperature, valve internal temperature, and outlet temperature means that, considering the influence of detection accuracy, refrigerant flow state, etc., the temperatures are the same within an allowable error range, not absolutely the same (e.g., all are the same value). This error range is specifically set according to the performance of the refrigerator; for example, it is the same within a range of 0.3℃. For instance, if the difference between any two of the inlet temperature, valve internal temperature, and outlet temperature is within 0.3℃, then the inlet temperature, valve internal temperature, and outlet temperature are the same.

[0064] like Figure 5 As shown, in an optional implementation of the above embodiment, the step of determining that the electric valve is stalled if, after the electric valve switches from the first state to the second state and operates for a first preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are the same, includes:

[0065] S411, if the valve temperature rises first when the electric valve switches from the first state to the second state, and after running for the first preset time, the inlet temperature, the valve temperature and the outlet temperature are the same, then it is determined that the electric valve is stalled.

[0066] In an embodiment, when the electric valve switches from the open state to the closed state, if the electric valve stalls, the electrical energy that needs to be converted into motor kinetic energy is converted into coil heat energy, causing the temperature inside the valve to rise. After running for a first preset time, the valve dissipates heat. If the inlet temperature, the temperature inside the valve, and the outlet temperature are the same, it is determined that the electric valve has stalled.

[0067] In some embodiments, when switching from the open state to the closed state, if the electric valve is stalled, the temperature inside the valve will rise by about 1.5°C in a short time. Then, within 1-2 minutes, the valve will dissipate heat. Since the inlet, the inside of the valve, and the outlet are connected, the inlet temperature, the temperature inside the valve, and the outlet temperature are the same. Therefore, it is determined that the electric valve has stalled.

[0068] like Figure 6As shown, as an optional implementation of the above embodiment, determining whether the electric valve has experienced a stall fault based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0069] S510, if the inlet temperature, the valve internal temperature, and the outlet temperature are different after the electric valve switches from the first state to the second state and runs for a second preset time, it is determined that the electric valve has stalled.

[0070] In this embodiment, if the inlet temperature, valve internal temperature, and outlet temperature are different when the electric valve switches from the closed state to the open state, then the inlet, valve internal temperature, and outlet of the electric valve are not connected. At this time, the electric valve is in the closed state, that is, the electric valve cannot be opened, and therefore it is determined that the electric valve has stalled.

[0071] It should be noted that, in the technical solution of this application embodiment, the difference between the inlet temperature, the valve internal temperature, and the outlet temperature means that, considering the influence of detection accuracy, refrigerant flow state, etc., on temperature, the differences occur within an allowable error range when the temperatures are the same. This error range is specifically set according to the performance of the refrigerator; for example, it is the same within a range of 0.3℃. For instance, if the difference between any two of the inlet temperature, valve internal temperature, and outlet temperature is outside the 0.3℃ range, then the inlet temperature, valve internal temperature, and outlet temperature are different.

[0072] like Figure 7 As shown, in an optional implementation of the above embodiment, the step of determining that the electric valve is stalled if the inlet temperature, the valve internal temperature, and the outlet temperature are different after the electric valve switches from the first state to the second state and runs for a second preset time includes:

[0073] S511, if the inlet temperature is less than the valve internal temperature, the valve internal temperature is less than the outlet temperature, and the outlet temperature is close to the ambient temperature, then it is determined that the electric valve is stalled.

[0074] In this embodiment, if the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature when the electric valve switches from the closed state to the open state, it is determined that the electric valve has stalled.

[0075] like Figure 8 As shown, in an optional implementation of the above embodiment, the step of determining that the electric valve is stalled if the inlet temperature, the valve internal temperature, and the outlet temperature are different after the electric valve switches from the first state to the second state and runs for a second preset time includes:

[0076] S511a, if when the electric valve switches from the first state to the second state, if the valve internal temperature rises to a preset temperature value within a third preset time period, and after a second preset time period, if the inlet temperature is less than the valve internal temperature, the valve internal temperature is less than the outlet temperature, and the outlet temperature approaches the ambient temperature, then it is determined that the electric valve has stalled; wherein, the third preset time period is less than the second preset time period.

[0077] In this embodiment, when the electric valve switches from the closed state to the open state, if the electric valve stalls, the electrical energy that needs to be converted into motor kinetic energy is converted into coil heat energy, causing the valve internal temperature to rise to a preset temperature value within a third preset time. After running for a second preset time, if the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then the electric valve is determined to be stalled. For example, if the electric valve stalls, the inlet, valve internal temperature, and outlet cannot be connected, the valve internal temperature rises by about 2°C within 10 seconds, and after 1 to 2 minutes, the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then the electric valve is determined to be stalled.

[0078] like Figure 4 As shown, as an optional implementation of the above embodiment, determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0079] S420, if the electric valve switches from the first state to the second state and runs for a first preset time, and the inlet temperature is less than the valve internal temperature and the outlet temperature, then it is determined that the electric valve did not stall when closed.

[0080] In some embodiments, when the electric valve switches from the open state to the closed state, if the electric valve does not become blocked, and after running for a first preset time, the inlet temperature is less than the valve internal temperature is less than the outlet temperature, the inlet and outlet of the electric valve are closed, and the electric valve switches to the closed state. At this time, it is determined that the electric valve has not broken.

[0081] like Figure 6 As shown, based on the second judgment condition, the determination of whether the electric valve has a stall fault includes the following: the inlet temperature, the valve internal temperature, and the outlet temperature.

[0082] S520, if the electric valve switches from the first state to the second state and runs for a second preset time, and the inlet temperature, the valve internal temperature, and the outlet temperature are the same, then it is determined that the electric valve did not stall when it was opened.

[0083] In some embodiments, when the electric valve switches from the closed state to the open state, if the electric valve does not become blocked, and after running for a second preset time, the inlet temperature and the valve internal temperature are lower than the outlet temperature, then the inlet, valve internal and outlet are connected, and it is determined that the electric valve has not become blocked.

[0084] This application embodiment also proposes a stall fault detection device for an electric valve in a refrigerator, wherein the electric valve is located between the outlet of the refrigerator's condenser and the inlet of the refrigerator's capillary tube; the stall fault detection device includes:

[0085] The control module controls the electric valve to switch from the first state to the second state;

[0086] The acquisition module acquires the inlet temperature, valve internal temperature, and outlet temperature of the electric valve.

[0087] The acquisition module is configured to acquire a first judgment condition if the first state is an open state and the second state is a closed state; and to acquire a second judgment condition if the first state is a closed state and the second state is an open state.

[0088] The judgment module is configured to determine whether the electric valve has a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature; and to determine whether the electric valve has a stall fault based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature.

[0089] This application also proposes a stall fault detection system for an electric valve of a refrigerator, comprising: one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the stall fault detection method for the electric valve of a refrigerator as described above.

[0090] Typically, the refrigerator's electric valve stall fault detection system includes: at least one processor, at least one memory, and a control program for the refrigerator's electric valve stall fault detection system stored in the memory and executable on the processor. The control program for the refrigerator's electric valve stall fault detection system is configured to implement the steps of the control method described above.

[0091] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor may also include a main processor and coprocessors. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. The processor may also include an AI (Artificial Intelligence) processor, which handles the control method operation of the refrigerator's electric valve stall fault detection system, enabling the detection method model of the refrigerator's electric valve stall fault detection system to learn autonomously, improving efficiency and accuracy.

[0092] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory is used to store at least one instruction, which is executed by a processor to implement the method for detecting the stall fault of the electric valve of a refrigerator provided in the method embodiments of this application.

[0093] Control the electric valve to switch from the first state to the second state;

[0094] Obtain the inlet temperature, valve internal temperature, and outlet temperature of the electric valve;

[0095] If the first state is open and the second state is closed, then the first judgment condition is obtained;

[0096] Based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature, determine whether the electric valve has experienced a stall fault;

[0097] If the first state is closed and the second state is open, then obtain the second judgment condition;

[0098] Based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature, it is determined whether the electric valve has experienced a stall fault.

[0099] Optionally, determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0100] If the inlet temperature, the valve internal temperature, and the outlet temperature are the same after the electric valve switches from the first state to the second state and runs for a first preset time, then it is determined that the electric valve has stalled.

[0101] Optionally, determining that the electric valve is stalled after the electric valve switches from the first state to the second state and operates for a first preset time, and the inlet temperature, the valve internal temperature, and the outlet temperature are the same, includes:

[0102] If, when the electric valve switches from the first state to the second state, the temperature inside the valve rises first, and after running for the first preset time, the inlet temperature, the temperature inside the valve, and the outlet temperature are the same, then it is determined that the electric valve has stalled.

[0103] Optionally, determining whether the electric valve has experienced a stall fault based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0104] If the inlet temperature, the valve internal temperature, and the outlet temperature are different after the electric valve switches from the first state to the second state and runs for a second preset time, it is determined that the electric valve has stalled.

[0105] Optionally, determining that the electric valve is stalled if, after the electric valve switches from the first state to the second state and operates for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are different includes:

[0106] If the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then the electric valve is determined to be stalled.

[0107] Optionally, determining that the electric valve is stalled if, after the electric valve switches from the first state to the second state and operates for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are different includes:

[0108] If, when the electric valve switches from the first state to the second state, the valve internal temperature rises to a preset temperature value within a third preset time period, and after a second preset time period, the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then it is determined that the electric valve has stalled; wherein, the third preset time period is shorter than the second preset time period.

[0109] Optionally, determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes:

[0110] If, after the electric valve switches from the first state to the second state and operates for a first preset time, the inlet temperature is less than the valve internal temperature and the outlet temperature, then it is determined that the electric valve did not stall when closed.

[0111] and / or

[0112] Based on the second judgment condition, the determination of whether the electric valve has experienced a stall fault includes the following: inlet temperature, valve internal temperature, and outlet temperature.

[0113] If, after the electric valve switches from the first state to the second state and runs for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are the same, then it is determined that the electric valve did not stall when it was opened.

[0114] The above provides a detailed description of a refrigerator and its electric valve stall fault detection method, device, and storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for detecting a stall fault in the electric valve of a refrigerator, characterized in that, The electric valve is located between the outlet of the refrigerator's condenser and the inlet of the refrigerator's capillary tube. The stall fault detection method includes: Control the electric valve to switch from the first state to the second state; Obtain the inlet temperature, valve internal temperature, and outlet temperature of the electric valve; If the first state is open and the second state is closed, then the first judgment condition is obtained; Based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature, determine whether the electric valve has experienced a stall fault; If the first state is closed and the second state is open, then obtain the second judgment condition; Based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature, it is determined whether the electric valve has experienced a stall fault.

2. The stall fault detection method as described in claim 1, characterized in that, The step of determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes: If the inlet temperature, the valve internal temperature, and the outlet temperature are the same after the electric valve switches from the first state to the second state and runs for a first preset time, then it is determined that the electric valve has stalled.

3. The stall fault detection method as described in claim 2, characterized in that, If, after the electric valve switches from the first state to the second state and operates for a first preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are the same, then determining that the electric valve has stalled includes: If, when the electric valve switches from the first state to the second state, the temperature inside the valve rises first, and after running for the first preset time, the inlet temperature, the temperature inside the valve, and the outlet temperature are the same, then it is determined that the electric valve has stalled.

4. The stall fault detection method as described in claim 1, characterized in that, Based on the second judgment condition, the determination of whether the electric valve has experienced a stall fault, including the inlet temperature, the valve internal temperature, and the outlet temperature, comprises: If the inlet temperature, the valve internal temperature, and the outlet temperature are different after the electric valve switches from the first state to the second state and runs for a second preset time, it is determined that the electric valve has stalled.

5. The stall fault detection method as described in claim 4, characterized in that, If, after the electric valve switches from the first state to the second state and operates for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are different, then determining that the electric valve has stalled includes: If the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then the electric valve is determined to be stalled.

6. The stall fault detection method as described in claim 5, characterized in that, If, after the electric valve switches from the first state to the second state and operates for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are different, then determining that the electric valve has stalled includes: If, when the electric valve switches from the first state to the second state, the valve internal temperature rises to a preset temperature value within a third preset time period, and after a second preset time period, the inlet temperature is lower than the valve internal temperature, the valve internal temperature is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, then it is determined that the electric valve has stalled; wherein, the third preset time period is shorter than the second preset time period.

7. The stall fault detection method as described in claim 1, characterized in that, The step of determining whether the electric valve has experienced a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature includes: If, after the electric valve switches from the first state to the second state and operates for a first preset time, the inlet temperature is less than the valve internal temperature and the outlet temperature, then it is determined that the electric valve did not stall when closed. and / or Based on the second judgment condition, the determination of whether the electric valve has experienced a stall fault, including the inlet temperature, the valve internal temperature, and the outlet temperature, comprises: If, after the electric valve switches from the first state to the second state and runs for a second preset time, the inlet temperature, the valve internal temperature, and the outlet temperature are the same, then it is determined that the electric valve did not stall when it was opened.

8. A device for detecting stall faults in the electric valve of a refrigerator, characterized in that, The electric valve is located between the outlet of the refrigerator's condenser and the inlet of the refrigerator's capillary tube. The stall fault detection device includes: The control module controls the electric valve to switch from the first state to the second state; The acquisition module acquires the inlet temperature, valve internal temperature, and outlet temperature of the electric valve. The acquisition module is configured to acquire a first judgment condition if the first state is an open state and the second state is a closed state; and to acquire a second judgment condition if the first state is a closed state and the second state is an open state. The judgment module is configured to determine whether the electric valve has a stall fault based on the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature; and to determine whether the electric valve has a stall fault based on the second judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature.

9. A refrigerator, characterized in that, The device includes a controller for performing the stall fault detection method according to any one of claims 1 to 7 or a stall fault detection device including the electric valve of the refrigerator as described in claim 8.

10. A computer storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps in the stall fault detection method according to any one of claims 1 to 7.

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