Refrigerator, locked-rotor fault detection method and device of electric valve of refrigerator and storage medium

Abstract

The invention provides a refrigerator, a locked-rotor fault detection method and device for an electric valve of the refrigerator and a storage medium. 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 locked-rotor fault detection method comprises the steps that the electric valve is controlled to be switched from a first state to a second state; the inlet temperature, the in-valve temperature and the outlet temperature of the electric valve are obtained; if the first state is an open state and the second state is a closed state, obtaining a first judgment condition; according to the first judgment condition, the inlet temperature, the in-valve temperature and the outlet temperature, whether the electric valve has a locked-rotor fault or not is judged; if the first state is the closed state and the second state is the open state, obtaining a second judgment condition; and according to the second judgment condition, the inlet temperature, the in-valve temperature and the outlet temperature, whether the electric valve has a locked-rotor fault or not is judged.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to a method, device and storage medium for detecting a stall fault of a refrigerator and an electric valve thereof. Background Art

[0002] Refrigerators are common household appliances. Electric valves are commonly used refrigerant regulating components in refrigerator refrigeration systems. As high-temperature, low-pressure refrigerant flows in the electric valve, it is easy to increase the resistance of its internal components, which in turn causes the electric valve to become blocked. In the prior art, electric valves are difficult to detect, and only after the refrigerator is disassembled can it be determined that the electric valve is blocked. Summary of the invention

[0003] The present application provides a method, device and storage medium for detecting a stall fault of a refrigerator and an electric valve thereof, aiming to solve the technical problem that it is difficult to detect a stall fault of an electric valve in the prior art.

[0004] In a first aspect, a method for detecting a stall fault of an electric valve of a refrigerator, wherein the electric valve is disposed 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:

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

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

[0007] If the first state is an open state and the second state is a closed state, obtaining a first judgment condition;

[0008] Determine whether a stall fault occurs in the electric valve according to the first judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature;

[0009] If the first state is a closed state and the second state is an open state, obtaining a second judgment condition;

[0010] According to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature, it is judged whether the electric valve has a stall fault.

[0011] Optionally, judging whether a stall fault occurs in the electric valve according to the first judging 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, it is determined that the electric valve is blocked.

[0013] Optionally, 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 determining that the electric valve is blocked includes:

[0014] If the temperature inside the valve 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 temperature inside the valve and the outlet temperature are the same, it is determined that the electric valve is blocked.

[0015] Optionally, judging whether a stall fault occurs in the electric valve according to 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 is blocked.

[0017] Optionally, 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, then determining that the electric valve is blocked includes:

[0018] If the inlet temperature is lower than the temperature inside the valve, the temperature inside the valve is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, it is determined that the electric valve is blocked.

[0019] Optionally, 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, then determining that the electric valve is blocked includes:

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

[0021] Optionally, judging whether a stall fault occurs in the electric valve according to the first judging 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 runs for a first preset time, the inlet temperature is lower than the valve internal temperature and lower than the outlet temperature, it is determined that the electric valve is not blocked when closed;

[0023] and / or

[0024] Judging whether a stall fault occurs in the electric valve according to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature includes:

[0025] 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 second preset time, it is determined that the electric valve is not blocked when it is opened.

[0026] In a second aspect, an embodiment of the present application further provides a stall fault detection device for an electric valve of a refrigerator, wherein the electric valve is disposed between an outlet of a condenser of the refrigerator and an inlet of a capillary tube of the refrigerator; the stall fault detection device comprises:

[0027] A control module, controlling the electric valve to switch from a first state to a second state;

[0028] An acquisition module is used to acquire the inlet temperature, the valve internal temperature and the 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 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 judge whether the electric valve has a jam fault based on the first judgment condition, the inlet temperature, the temperature inside the valve and the outlet temperature; and to judge whether the electric valve has a jam fault based on the second judgment condition, the inlet temperature, the temperature inside the valve and the outlet temperature.

[0031] In a third aspect, an embodiment of the present application further proposes a refrigerator, comprising a controller, wherein the controller is used to execute the stall fault detection method as described above or the stall fault detection device of the electric valve of the refrigerator as described above.

[0032] In a fourth aspect, an embodiment of the present application further proposes a computer storage medium on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the stall fault detection method as described above.

[0033] In the technical solution of the embodiment of the present application, by controlling the electric valve to perform a switching action or a closing and opening operation, according to the first judgment condition corresponding to the switching action or the second judgment condition corresponding to the closing and opening operation, and in combination with the inlet temperature, the temperature inside the valve and the outlet temperature, it is judged whether the electric valve has a jam failure when performing the switching action or the closing and opening operation. This is a non-invasive detection, which does not require disassembly of refrigerator components, reduces detection costs and maintenance difficulty, and can quickly locate the jam failure of the electric valve, which helps to improve the refrigeration efficiency and service life of the compressor and the reliability of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the 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 work.

[0035] Figure 1 is a schematic diagram of a refrigeration system of a refrigerator provided in an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of the structure of an electric valve in a refrigerator provided in an embodiment of the present application;

[0037] Figure 3 1 is a flow chart of a method for detecting a stall fault of an electric valve of a refrigerator provided in an embodiment of the present application;

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

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

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

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

[0042] Figure 8 yes Figure 7 A schematic diagram of a sub-step of step S511 in FIG. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0046] like Figure 1As shown, an embodiment of the present application provides a refrigeration system for a refrigerator, including a compressor 10, a condenser 20, an electric valve 30, a capillary tube 40 and an evaporator 50. The compressor 10, the condenser 20, the electric valve 30, the capillary tube 40 and the evaporator 50 are connected in sequence. After the refrigerant exits the compressor, it passes through the condenser, the electric valve, the capillary tube and the evaporator in sequence, and enters the compressor from the inlet of the compressor to complete a cycle. The electric valve is arranged between the outlet of the condenser of the refrigerator and the inlet of the capillary tube of the refrigerator. The electric valve is used to adjust the flow of the refrigerant in the refrigeration system to adjust the cooling capacity.

[0047] When adjusting the flow rate, the electric valve needs to switch from one state to another. For example, it needs to switch from a closed state to an open state, or from an open state to a closed state, or from an intermediate state to another intermediate state. When the electric valve is blocked, it is difficult to complete the switch between states, which in turn causes the refrigerator to be unable to complete the corresponding function switch, such as adjusting the cooling amount, or being unable to cool, or always cooling. Therefore, it is necessary to detect the blocking of the electric valve.

[0048] In the technical solution of the embodiment of the present application, a method for detecting a stall fault of an electric valve of a refrigerator is provided. The stall fault detection method is executed by a controller in the refrigerator. Figure 2 As shown, the electric valve includes an inlet, a valve interior and an outlet, which correspond to an inlet temperature T31, a valve interior temperature T32 and an outlet temperature T33 respectively. The inlet temperature, the valve interior temperature and the outlet temperature are measured by temperature sensors respectively, and the temperature sensor can be one of a thermocouple temperature sensor and a resistance temperature sensor. That is, the inlet, the valve interior and the outlet are respectively provided with temperature sensors for detecting the inlet temperature, the valve interior temperature and the outlet temperature.

[0049] like Figure 3 As shown, the embodiment of the present application also provides a method for detecting a stall fault of an electric valve of a refrigerator, and the stall fault detection method includes:

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

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

[0052] S301, if the first state is an open state and the second state is a closed state, obtaining a first judgment condition;

[0053] S400, judging whether a stall fault occurs in the electric valve according to the first judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature;

[0054] S302, if the first state is a closed state and the second state is an open state, obtaining a second judgment condition;

[0055] S500, judging whether a stall fault occurs in the electric valve according to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature.

[0056] In the technical solution of the embodiment of the present application, by controlling the electric valve to perform a switching action or a closing and opening operation, according to the first judgment condition corresponding to the switching action or the second judgment condition corresponding to the closing and opening operation, and in combination with the inlet temperature, the temperature inside the valve and the outlet temperature, it is judged whether the electric valve has a jam failure when performing the switching action or the closing and opening operation. This is a non-invasive detection, which does not require disassembly of refrigerator components, reduces detection costs and maintenance difficulty, and can quickly locate the jam failure of the electric valve, which helps to improve the refrigeration efficiency and service life of the compressor and the reliability of the refrigerator.

[0057] It should be noted that the detection may be that each time the electric valve of the refrigerator switches from the first state to the second state, the controller executes the jam fault detection method; the detection may be that the controller executes the jam fault detection method once when the electric valve of the refrigerator switches from the first state to the second state a preset number of times; or the controller starts to execute the jam fault detection method in response to a detection instruction input from the outside.

[0058] In some embodiments, when the electric valve is blocked, the refrigerator will notify the user in a certain form, such as an indicator light or text on the refrigerator panel, or the refrigerator sends a warning message to the user's APP. Or when the maintenance personnel input a detection command for detection, when the electric valve is blocked, the refrigerator sends the detection result to the device used by the maintenance personnel in at least one form of text, voice, light, and image.

[0059] In some embodiments of the present application, the open state may be a fully open state; that is, when executing the stall fault detection method, the electric valve switches from the closed state to the fully open state, or from the fully open state to the closed state, so that the electric valve detects whether it is stalled during the entire switching process. In other embodiments, the open state may 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, judging whether the electric valve has a stall fault according to 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, it is determined that the electric valve is blocked.

[0062] In this embodiment, when the electric valve switches from an open state to a closed state, if the inlet temperature, the valve temperature and the outlet temperature are the same, the inlet, the valve interior and the outlet of the electric valve are connected. At this time, the electric valve is in an on state rather than a closed state, so the electric valve is stuck.

[0063] It should be noted that in the technical solution of the embodiment of the present application, the inlet temperature, the valve temperature and the outlet temperature are the same, which means that: considering the influence of detection accuracy, the flow state of the refrigerant, etc. on the temperature, the temperature is the same when it is within the allowable error range, rather than absolutely the same (for example, they are all the same value). The error range is specifically set according to the performance of the refrigerator, such as the same within the range of 0.3°C. For example, if the difference between any two of the inlet temperature, the valve temperature and the outlet temperature is within the range of 0.3°C, then the inlet temperature, the valve temperature and the outlet temperature are the same.

[0064] like Figure 5 As shown, as an optional implementation of the above embodiment, 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 judging that the electric valve is blocked includes:

[0065] S411, if the temperature inside the valve 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 temperature inside the valve and the outlet temperature are the same, it is determined that the electric valve is blocked.

[0066] In an embodiment, when the electric valve switches from an open state to a closed state, when the electric valve is blocked, the electrical energy that needs to be converted into kinetic energy of the motor is converted into coil thermal energy, causing the temperature inside the valve to rise, and after running for a first preset period of time, the heat is dissipated inside the valve, and the inlet temperature, the temperature inside the valve and the outlet temperature are the same, thereby judging that the electric valve is blocked.

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

[0068] like Figure 6As shown, as an optional implementation of the above embodiment, judging whether the electric valve has a stall fault according to 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 is blocked.

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

[0071] It should be noted that in the technical solution of the embodiment of the present application, the difference between the inlet temperature, the temperature inside the valve and the outlet temperature means that: considering the influence of the detection accuracy, the flow state of the refrigerant, etc. on the temperature, the same temperature is different when it is within the allowable error range. The error range is specifically set according to the performance of the refrigerator, for example, it is the same within the range of 0.3°C. For example, if the difference between any two of the inlet temperature, the temperature inside the valve and the outlet temperature is outside the range of 0.3°C, then the inlet temperature, the temperature inside the valve and the outlet temperature are different.

[0072] like Figure 7 As shown, as an optional implementation of the above embodiment, 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, then judging that the electric valve is blocked includes:

[0073] S511, if the inlet temperature is lower than the temperature inside the valve, the temperature inside the valve is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, it is determined that the electric valve is blocked.

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

[0075] like Figure 8 As shown, as an optional implementation of the above embodiment, 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, then judging that the electric valve is blocked includes:

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

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

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

[0079] S420: If, after the electric valve switches from the first state to the second state and runs for a first preset time, the inlet temperature is lower than the temperature inside the valve and lower than the outlet temperature, it is determined that the electric valve is not blocked when closed.

[0080] In some embodiments, when the electric valve switches from an open state to a closed state, if the electric valve is not blocked, then after running for a first preset period of time, the inlet temperature is lower than the temperature inside the valve and lower than the outlet temperature, the inlet and outlet of the electric valve are closed, and the electric valve is switched to a closed state. At this time, it is determined that the electric valve is not broken.

[0081] like Figure 6 As shown, judging whether the electric valve has a stall fault according to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature includes:

[0082] S520: 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 temperature and the outlet temperature are the same, it is determined that the electric valve is not blocked when it is opened.

[0083] In some embodiments, when the electric valve switches from a closed state to an open state, if the electric valve is not blocked, then after running for a second preset period of time, the inlet temperature and the temperature inside the valve are lower than the outlet temperature. At this time, the inlet, the valve interior and the outlet are connected, and it is determined that the electric valve is not blocked.

[0084] The embodiment of the present application further provides a stall fault detection device for an electric valve of a refrigerator, wherein 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 device comprises:

[0085] A control module, controlling the electric valve to switch from a first state to a second state;

[0086] An acquisition module is used to acquire the inlet temperature, the valve internal temperature and the 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 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 judge whether the electric valve has a jam fault based on the first judgment condition, the inlet temperature, the temperature inside the valve and the outlet temperature; and to judge whether the electric valve has a jam fault based on the second judgment condition, the inlet temperature, the temperature inside the valve and the outlet temperature.

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

[0090] In general, usually, the jam fault detection system of the electric valve of the refrigerator includes: at least one processor, at least one memory, and a control program of the jam fault detection system of the electric valve of the refrigerator stored in the memory and executable on the processor. The control program of the jam fault detection system of the electric valve of the refrigerator is configured to implement the steps of the previous control method.

[0091] The processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. The processor may also include an AI (Artificial Intelligence) processor, which is used to process the control method operation of the electric valve jam fault detection system of the refrigerator, so that the detection method model of the electric valve jam fault detection system of the refrigerator can be trained and learned autonomously to improve 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 a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory is used to store at least one instruction, which is used to be executed by the processor to implement the method embodiment of the present application provided by the refrigerator electric valve jam fault detection system and the refrigerator electric valve jam fault detection method:

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

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

[0095] If the first state is an open state and the second state is a closed state, obtaining a first judgment condition;

[0096] Determine whether a stall fault occurs in the electric valve according to the first judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature;

[0097] If the first state is a closed state and the second state is an open state, obtaining a second judgment condition;

[0098] According to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature, it is judged whether the electric valve has a stall fault.

[0099] Optionally, judging whether a stall fault occurs in the electric valve according to the first judging 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, it is determined that the electric valve is blocked.

[0101] Optionally, 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 determining that the electric valve is blocked includes:

[0102] If the temperature inside the valve 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 temperature inside the valve and the outlet temperature are the same, it is determined that the electric valve is blocked.

[0103] Optionally, judging whether a stall fault occurs in the electric valve according to 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 is blocked.

[0105] Optionally, 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, then determining that the electric valve is blocked includes:

[0106] If the inlet temperature is lower than the temperature inside the valve, the temperature inside the valve is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, it is determined that the electric valve is blocked.

[0107] Optionally, 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, then determining that the electric valve is blocked includes:

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

[0109] Optionally, judging whether a stall fault occurs in the electric valve according to the first judging 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 runs for a first preset time, the inlet temperature is lower than the valve internal temperature and lower than the outlet temperature, it is determined that the electric valve is not blocked when closed;

[0111] and / or

[0112] Judging whether a stall fault occurs in the electric valve according to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature includes:

[0113] 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 second preset time, it is determined that the electric valve is not blocked when it is opened.

[0114] The above is a detailed introduction to a refrigerator and its electric valve jam fault detection method, device and storage medium provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for detecting a stalled electric valve of a refrigerator, characterized in that: The electric valve is provided between the outlet of the condenser of the refrigerator and the inlet of the 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; Obtaining the inlet temperature, valve internal temperature and outlet temperature of the electric valve; If the first state is an open state and the second state is a closed state, obtaining a first judgment condition; Determining whether a stall fault occurs in the electric valve according to the first judgment condition, the inlet temperature, the valve internal temperature, and the outlet temperature; If the first state is the closed state and the second state is the open state, obtaining a second judgment condition; According to the second judgment condition, the inlet temperature, the valve internal temperature and the outlet temperature, it is judged whether the electric valve has a stall fault.

2. The method for detecting a stall fault according to claim 1, wherein: The determining whether a stall fault occurs in the electric valve according to the first determining 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 operates for a first preset time, it is determined that the electric valve is blocked.

3. The method for detecting a stall fault according to claim 2, wherein: 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 operates for a first preset time, then determining that the electric valve is locked includes: If the temperature inside the valve 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 temperature inside the valve and the outlet temperature are the same, it is determined that the electric valve is blocked.

4. The method for detecting a stall fault according to claim 1, wherein: Judging whether a stall fault occurs in the electric valve according to the second 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 different after the electric valve switches from the first state to the second state and operates for a second preset time, it is determined that the electric valve is blocked.

5. The method for detecting a stall fault according to claim 4, wherein: 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 operates for a second preset time, then determining that the electric valve is locked 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, it is determined that the electric valve is blocked.

6. The method for detecting a stall fault according to claim 5, wherein: 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 operates for a second preset time, then determining that the electric valve is locked includes: If, when the electric valve switches from the first state to the second state, if the temperature inside the valve rises by a preset temperature value within a third preset time period, and after the second preset time period, if the inlet temperature is lower than the temperature inside the valve, the temperature inside the valve is lower than the outlet temperature, and the outlet temperature approaches the ambient temperature, it is determined that the electric valve is blocked; wherein, the third preset time period is lower than the second preset time period.

7. The method for detecting a stall fault according to claim 1, wherein: The determining whether a stall fault occurs in the electric valve according to the first determining 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 lower than the valve internal temperature and lower than the outlet temperature, it is determined that the electric valve is not blocked when closed; and / or Judging whether a stall fault occurs in the electric valve according to the second 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 operates for a second preset time, it is determined that the electric valve is not blocked when it is opened.

8. A device for detecting a stall fault of an electric valve of a refrigerator, characterized in that: The electric valve is provided between the outlet of the condenser of the refrigerator and the inlet of the capillary tube of the refrigerator; The stall fault detection device comprises: A control module controls the electric valve to switch from a first state to a second state; An acquisition module is used to acquire the inlet temperature, the valve internal temperature and the 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 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 judge whether the electric valve has a jam fault based on the first judgment condition, the inlet temperature, the temperature inside the valve and the outlet temperature; and to judge whether the electric valve has a jam fault based on the second judgment condition, the inlet temperature, the temperature inside the valve and the outlet temperature.

9. A refrigerator, characterized in that: The invention comprises a controller for executing the stall fault detection method according to any one of claims 1 to 7 or the stall fault detection device for the electric valve of the refrigerator according to claim 8.

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

Images