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

Abstract

The invention provides a refrigerator, a locked-rotor detection method and device for an electric valve of the refrigerator and a storage medium. The refrigerator further comprises a thermal imager. The thermal imager is configured to collect a thermal image of the electric valve. The detection method comprises the following steps: acquiring a plurality of first thermal images; according to the plurality of first thermal images, respectively determining an inlet acquisition point location, an in-valve acquisition point location and an outlet acquisition point location corresponding to an inlet, an in-valve and an outlet of the electrically operated valve; the electric valve is controlled to be switched from the first state to the second state; acquiring a first temperature value, a second temperature value and a third temperature value of the inlet acquisition point location, the in-valve acquisition point location and the outlet acquisition point location; and according to the first temperature value, the second temperature value and the third temperature value, 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 refrigerator fault detection, and in particular to a refrigerator and an electric valve jam detection method, device and storage medium thereof. Background Art

[0002] With the development of refrigerators, some refrigerators have adopted the technology of regulating the refrigerant flow rate with electric valves to meet market demand and match the functions of refrigerators. However, electric valves are used for a long time in a high-pressure and low-temperature refrigerant environment; high-temperature and low-pressure refrigerants easily cause the resistance of the electric valve to increase, and then a stall failure occurs, causing the refrigerator to have an unreliable refrigeration effect or even fail to refrigerate. Therefore, it is necessary to perform a stall detection on the electric valve. However, in the prior art, the electric valve is only tested for stall after the refrigerator is disassembled, and the detection efficiency is low. Summary of the invention

[0003] The present application provides a refrigerator and an electric valve jam detection method, device and storage medium thereof, aiming to solve the technical problem of low efficiency of electric valve jam detection in the prior art.

[0004] In a first aspect, the present application proposes a method for detecting a stalled electric valve of a refrigerator, wherein the refrigerator further comprises a thermal imager configured to capture a thermal image of the electric valve; the detection method comprises:

[0005] acquiring a plurality of first thermal images;

[0006] According to the plurality of first thermal images, respectively determining the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve;

[0007] Controlling the electric valve to switch from a first state to a second state;

[0008] Acquire a first temperature value, a second temperature value, and a third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0009] Whether a stall fault occurs in the electric valve is determined according to the first temperature value, the second temperature value, and the third temperature value.

[0010] Optionally, the plurality of first thermal images include a plurality of first thermal images of the electric valves when they are opened and a plurality of first thermal images of the electric valves when they are closed;

[0011] The step of determining, according to the plurality of first thermal images, the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve, respectively, comprises:

[0012] Determining a collection point corresponding to the electric valve according to one of the first thermal images of the plurality of electric valves when the electric valves are opened;

[0013] Determine a plurality of inlet points corresponding to the inlet, a plurality of in-valve points corresponding to the valve, and a plurality of outlet points corresponding to the outlet according to the collection points corresponding to the electric valve and the first thermal images of the plurality of electric valves when they are closed;

[0014] According to the first thermal images of the plurality of electric valves when they are closed, respectively determining an average temperature of an inlet of the electric valve, an average temperature inside the valve, and an average temperature of an outlet of the electric valve;

[0015] The inlet collection point, the valve collection point and the outlet collection point are determined according to the average temperature of the inlet of the electric valve, the average temperature inside the valve and the average temperature of the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

[0016] Optionally, determining the inlet collection point, the valve collection point, and the outlet collection point according to the average temperature of the inlet of the electric valve, the average temperature inside the valve, and the average temperature of the outlet, as well as the multiple inlet points, the multiple valve points, and the multiple outlet points includes:

[0017] Determine one of the multiple entry points that is closest to the average temperature of the entry as the entry collection point;

[0018] Determine one of the multiple points in the valve that is closest to the average temperature in the valve as the sampling point in the valve;

[0019] Determine one of the multiple outlet points that is closest to the average temperature of the outlet as the outlet collection point.

[0020] Optionally, determining the average temperature of the inlet of the electric valve, the average temperature inside the valve, and the average temperature of the outlet according to the plurality of first thermal images further comprises:

[0021] Acquire a second thermal image of the plurality of electric valves when they are closed;

[0022] According to the first thermal image and the second thermal image of the plurality of electric valves when they are closed, respectively updating an average temperature at an inlet of the electric valve, an average temperature inside the valve, and an average temperature at an outlet of the electric valve;

[0023] According to the average temperature of the inlet of the electric valve, the average temperature in the valve, and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points, and the multiple outlet points, determining the inlet collection points, the valve collection points, and the outlet collection points includes:

[0024] The inlet collection point, the valve collection point and the outlet collection point are determined according to the updated average temperature of the inlet of the electric valve, the average temperature inside the valve and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

[0025] Optionally, controlling the electric valve to switch from the first state to the second state includes:

[0026] Controlling the electric valve to switch from an open state to a closed state;

[0027] Acquiring the first temperature value, the second temperature value, and the third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point includes:

[0028] Acquire a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0029] The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes:

[0030] If any of the following conditions occurs, it is determined that the electric valve has a stall fault:

[0031] The second temperature value when running for the first preset time is higher than the second temperature value when the electric valve is just switched from the open state to the closed state, and the first temperature value when running for the first preset time is the same as the third temperature value when running for the first preset time;

[0032] The first temperature value, the second temperature value and the third temperature value when running for a second preset time are the same; wherein the first preset time is less than the second preset time.

[0033] Optionally, controlling the electric valve to switch from the first state to the second state includes:

[0034] Controlling the electric valve to switch from a closed state to an open state;

[0035] The obtaining of the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve interior collection point and the outlet collection point comprises:

[0036] Acquire a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0037] The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes:

[0038] If any of the following conditions occurs, it is determined that the electric valve has a stall fault:

[0039] The first temperature value when running for a third preset time period is lower than the third temperature value when running for the third preset time period;

[0040] The second temperature value when running for the fourth preset time is higher than the second temperature value when the electric valve just switches from the closed state to the open state, and is higher than the first temperature value when running for the fourth preset time; wherein the third preset time is greater than or equal to the fourth preset time.

[0041] Optionally, before acquiring the plurality of first thermal images and acquiring the second thermal image, the stall detection method further includes:

[0042] Controlling the compressor of the refrigerator to start.

[0043] In a second aspect, an embodiment of the present application further provides a refrigerator electric valve stall detection device, the refrigerator further comprising a thermal imager, the thermal imager being configured to collect a thermal image of the electric valve; the detection device comprising:

[0044] An acquisition module, used for acquiring a plurality of first thermal images; the first thermal images are acquired when the electric valve is not blocked;

[0045] A determination module, configured to determine, according to the plurality of first thermal images, an inlet acquisition point, an inlet acquisition point, and an outlet acquisition point corresponding to the inlet, the inlet of the electric valve, and the outlet of the electric valve;

[0046] A control module, used for controlling the electric valve to switch from a first state to a second state; and the acquisition module is further used for acquiring the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve internal collection point and the outlet collection point;

[0047] The judgment module is further used to judge whether the electric valve has a stall fault according to the first temperature value, the second temperature value and the third temperature value.

[0048] On the third aspect, the present application also proposes a refrigerator, comprising an electric valve, a thermal imager and a controller; the thermal imager is configured to collect a thermal image of the electric valve; the controller is signal-connected to the electric valve and the thermal imager respectively, and the controller is configured to execute to implement the electric valve jam detection method as described above.

[0049] In a fourth aspect, the present application further proposes a computer-readable storage medium on which a computer program is stored, and the computer program is loaded by a processor to execute the steps of the electric valve jam detection method as described above.

[0050] In the technical solution of the embodiment of the present application, a thermal imager is arranged in the refrigerator to collect the thermal image of the electric valve; by obtaining multiple first thermal images of the electric valve, the inlet collection points, the inlet collection points in the valve and the outlet of the electric valve are determined, so that when the electric valve is detected, the first temperature value, the second temperature value and the third temperature value of the inlet collection points, the inlet collection points and the outlet collection points can be directly obtained; and then the first temperature value, the second temperature value and the third temperature value are used to determine whether the electric valve has a jam fault, so that the jam fault of the electric valve can be detected in time without disassembling the refrigerator, thereby improving the detection efficiency of the jam fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 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.

[0052] Figure 1 It is a flow chart of a method for detecting a stalled rotation of an electric valve provided in an embodiment of the present application;

[0053] Figure 2 yes Figure 1 Schematic diagram of sub-steps of step S300;

[0054] Figure 3 yes Figure 2 Schematic diagram of sub-steps of step S340;

[0055] Figure 4 It is a schematic diagram of a process flow of detecting a stall when an electric valve is closed in the electric valve stall detection method provided in an embodiment of the present application;

[0056] Figure 5 It is a schematic diagram of a process flow of detecting a stall when an electric valve is opened in the electric valve stall detection method provided in an embodiment of the present application;

[0057] Figure 6 is another flow chart of the electric valve jam detection method provided in an embodiment of the present application;

[0058] Figure 7 It is a structural schematic diagram of the electric valve jam detection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] 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.

[0062] The embodiments of the present application provide a refrigerator and a method, device, server and storage medium for detecting a jam in an electric valve thereof, which are described in detail below.

[0063] The refrigerator includes a refrigeration system. The refrigeration system includes a compressor, a condenser, a throttling device and an evaporator connected in sequence. Under the action of the compressor, the refrigerant passes through the condenser, the throttling device and the evaporator in sequence, and then flows back to the compressor to complete a refrigeration cycle. The electric valve is arranged between the condenser and the throttling device to adjust the flow of the refrigerant. The refrigerator also includes a thermal imager for collecting thermal images of the electric valve. An embodiment of the present application provides a method for detecting a stall of an electric valve, which is executed by a controller arranged in the refrigerator. That is, the controller is connected to the electric valve signal, such as a signal line connection.

[0064] like Figure 1 As shown, it is a schematic diagram of a flow chart of an embodiment of a method for detecting a stalled electric valve in an embodiment of the present application, and the method for detecting a stalled electric valve includes:

[0065] S200, acquiring a plurality of first thermal images;

[0066] S300, determining, according to the plurality of first thermal images, inlet acquisition points, inlet acquisition points and outlet acquisition points corresponding to the inlet, inlet and outlet of the electric valve respectively;

[0067] S400, controlling the electric valve to switch from a first state to a second state;

[0068] S500, obtaining a first temperature value, a second temperature value, and a third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0069] S600: Determine whether a stall fault occurs in the electric valve according to the first temperature value, the second temperature value, and the third temperature value.

[0070] In the technical solution of the embodiment of the present application, a thermal imager is arranged in the refrigerator to collect the thermal image of the electric valve; by obtaining multiple first thermal images of the electric valve, the inlet collection points, the inlet collection points in the valve and the outlet of the electric valve are determined, so that when the electric valve is detected, the first temperature value, the second temperature value and the third temperature value of the inlet collection points, the inlet collection points and the outlet collection points can be directly obtained; and then the first temperature value, the second temperature value and the third temperature value are used to determine whether the electric valve has a jam fault, so that the jam fault of the electric valve can be detected in time without disassembling the refrigerator, thereby improving the detection efficiency of the jam fault.

[0071] In the embodiment, since there are some deviations in the installation position of the thermal imager and there are multiple points of the thermal imager to generate thermal images, in the technical solution of the embodiment of the present application, the first thermal image is acquired multiple times to determine the inlet and outlet collection points, the valve inside collection points and the outlet collection points from the points of the thermal image, so as to accurately reflect the temperature information of the electric valve; and then when detecting a stall, the first temperature value, the second temperature value and the third temperature value corresponding to the inlet and outlet collection points, the valve inside collection points and the outlet collection points are directly acquired.

[0072] It should be noted that the thermal imager uses an infrared detector and an optical imaging objective lens to receive the infrared radiation energy of the electric valve under test, and reflects the energy distribution pattern on the photosensitive element of the infrared detector, thereby obtaining a thermal image, which corresponds to the thermal distribution field on the surface of the object. The measuring surface of the thermal imager includes multiple points (for example, 100), and the 100 points include points for collecting the temperatures of the inlet, inside the valve and at the outlet, and some points also collect the temperature in the environment. In some embodiments, the measurement accuracy of the thermal imager is 0.5°C, the collection temperature range is: -50°C-50°C, there is no display screen, RS485 communication, and standard Modbus-RTU protocol. Furthermore, the thermal imager is installed near the electric valve, such as 5 cm in front of the electric valve, and there is no obstruction between the two.

[0073] In the above embodiments, the first state may be a closed state or an open state, and the second state may be the other of the closed state and the open state.

[0074] In the above embodiments, steps S200 and S300 can be understood as point-finding and calibration steps for the collection points at the inlet, inside the valve, and at the outlet. Normally, steps S200 and S300 are the steps for point-finding and calibration of the collection points at the inlet, inside the valve, and at the outlet, after the thermal imager is installed in the refrigerator. The point-finding and calibration steps can be completed automatically by the system, or by the user through the controls on the control panel or the APP. Steps S400-S600 are steps that are executed when detection is required, such as the refrigerator performing a self-check at regular intervals, or the user triggers the detection or the detection is triggered during maintenance.

[0075] Before acquiring a plurality of first thermal images, the detection method further includes a control step of acquiring the first thermal images:

[0076] Controlling the electric valve to open, and after running for a fifth preset time, controlling the thermal imager to collect a first thermal image;

[0077] The electric valve is controlled to close and run for a sixth preset time, and the thermal imager is controlled to collect the first thermal image again.

[0078] The control step of acquiring the first thermal image is executed repeatedly in a loop until a preset number of first thermal images are acquired, and then the control step of acquiring the first thermal image is stopped.

[0079] The fifth preset time period and the sixth preset time period are both for allowing the temperature in the electric valve to reach a stable state.

[0080] As an optional implementation of the above embodiment, the plurality of first thermal images include a plurality of first thermal images of the electric valves when they are opened and a plurality of first thermal images of the electric valves when they are closed;

[0081] like Figure 2 As shown, the step of determining the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve respectively according to the plurality of first thermal images comprises:

[0082] S310, determining a collection point corresponding to the electric valve according to one of the first thermal images of the plurality of electric valves when they are opened;

[0083] S320, determining a plurality of entry points corresponding to the inlet, a plurality of valve points corresponding to the valve, and a plurality of outlet points corresponding to the outlet according to the collection points corresponding to the electric valve and the first thermal images of the plurality of electric valves when they are closed;

[0084] S330, determining an average temperature of an inlet of the electric valve, an average temperature inside the valve, and an average temperature of an outlet of the electric valve, respectively, according to the plurality of first thermal images;

[0085] S340, determining the inlet collection point, the valve collection point and the outlet collection point according to the average temperature at the inlet of the electric valve, the average temperature inside the valve and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

[0086] In an embodiment, a thermal image is an image formed by a thermal imager according to thermal radiation of an electric valve, and thus, according to the temperature distribution in the thermal image, a collection point corresponding to the electric valve is determined (in the environment in which the electric valve is located, the electric valve is at a low temperature, while the environment is at a high temperature, and accordingly, the collection point of the electric valve is determined); and then, according to the collection point and the first thermal images of the multiple electric valves when closed (after closing, the temperatures of the inlet, the inside of the valve, and the outlet are different, and accordingly, the collection points can be divided into entry points, inside valve points, and outlet points), a plurality of entry points corresponding to the inlet of the electric valve, a plurality of inside valve points corresponding to the valve, and a plurality of outlet points corresponding to the outlet are correspondingly determined; according to the first thermal images of the multiple electric valves when closed, the average temperature of the inlet of the electric valve, the average temperature of the inside of the valve, and the average temperature of the outlet are respectively determined; accordingly, the inlet and outlet collection points, the inside valve collection points, and the outlet collection points are determined according to the average temperature of the inlet of the electric valve, the average temperature of the inside of the valve, and the average temperature of the outlet, as well as the entry points, inside valve points, and outlet points.

[0087] In an embodiment, each of the electric valves has a plurality of temperatures collected at the entry points, temperatures collected at the valve points, and temperatures collected at the exit points in the first thermal image when the valve is closed. Based on this, the average temperature of an entry point, the average temperature of a valve point, and the average temperature corresponding to the exit point can be calculated respectively. Then, the average temperatures of the entry points corresponding to the first thermal images of the electric valves when they are closed are averaged, the average temperatures of the valve points, and the average temperatures corresponding to the exit points are averaged, and then the average temperature of the entry of the electric valve, the average temperature inside the valve, and the average temperature of the exit are obtained. In an embodiment, each of the electric valves has a plurality of temperatures collected at the entry points, temperatures collected at the valve points, and temperatures collected at the exit points in the first thermal image when the valve is closed. Based on this, the corresponding temperatures of the entry points, the temperatures of the valve points, and the exit points in the first thermal images are averaged, and the average temperature of the entry of the electric valve, the average temperature inside the valve, and the average temperature of the exit are obtained.

[0088] As an optional implementation of the above embodiment, Figure 3 As shown, the determining of the inlet collection point, the valve collection point and the outlet collection point according to the average temperature at the inlet of the electric valve, the average temperature inside the valve and the average temperature at the outlet and the multiple inlet points, the multiple valve points and the multiple outlet points includes:

[0089] S341, determining one of the multiple entry points that is closest to the average temperature of the entry as the entry collection point;

[0090] S342, determining one of the multiple points in the valve that is closest to the average temperature in the valve as the sampling point in the valve;

[0091] S343: Determine one of the multiple outlet points that is closest to the average temperature of the outlet as the outlet collection point.

[0092] In the embodiment, the inlet position at which the collected temperature among the multiple inlet points is closest to the average temperature of the inlet is the inlet collection point, and the first temperature value collected at the inlet collection point can more truly reflect the temperature value at the inlet. The inlet position at which the collected temperature among the multiple in-valve points is closest to the average temperature inside the valve is the in-valve collection point, and the first temperature value collected at the in-valve collection point can more truly reflect the temperature value inside the valve. The outlet position at which the collected temperature among the multiple outlet points is closest to the average temperature of the outlet is the outlet collection point, and the first temperature value collected at the outlet collection point can more truly reflect the temperature value at the outlet.

[0093] As an optional implementation of the above embodiment, the step of determining the average temperature at the inlet of the electric valve, the average temperature inside the valve, and the average temperature at the outlet according to the plurality of first thermal images further includes:

[0094] Acquire a second thermal image of the plurality of electric valves when they are closed;

[0095] According to the first thermal image and the second thermal image of the plurality of electric valves when they are closed, respectively updating an average temperature at an inlet of the electric valve, an average temperature inside the valve, and an average temperature at an outlet of the electric valve;

[0096] According to the average temperature at the inlet of the electric valve, the average temperature in the valve and the average temperature at the outlet, and the multiple inlet points, the multiple valve points and the multiple outlet points, determining the inlet collection points, the valve collection points and the outlet collection points includes:

[0097] The inlet collection point, the valve collection point and the outlet collection point are determined according to the updated average temperature at the inlet of the electric valve, the average temperature inside the valve and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

[0098] That is, in the embodiment, in order to improve the accuracy of detection, the point-finding step can be performed in real time. That is, each time the second thermal image is acquired, the inlet acquisition point, the valve internal acquisition point and the outlet acquisition point are re-determined according to the above steps S330-S340, so that when detecting the stall, the location can be quickly and accurately positioned, thereby improving the detection accuracy and efficiency.

[0099] In an embodiment, the first thermal image and the second thermal image are thermal images collected when the electric valve is not blocked. That is, the temperature distribution of the thermal image used for point finding is highly consistent, avoiding calibration errors of the collection points due to singular points. In an embodiment, the first thermal image can be collected before or just after the refrigerator is used; and the second thermal image can be a thermal image obtained during the use of the refrigerator and during the refrigerator self-check process, if it is determined that the electric valve is not blocked.

[0100] In some embodiments, both the first thermal image and the second thermal image are images obtained after the refrigerator is switched from a closed state to an open state and has been running for a period of time, and at this time, the electric valve and the environment can be effectively distinguished.

[0101] As an optional implementation of the above embodiment, Figure 4 As shown, controlling the electric valve to switch from the first state to the second state includes:

[0102] S410, controlling the electric valve to switch from an open state to a closed state;

[0103] Acquiring the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve interior collection point and the outlet collection point comprises:

[0104] S510, acquiring a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0105] The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes:

[0106] If any of the following conditions occurs, it is determined that the electric valve has a stall fault:

[0107] The second temperature value when running for the first preset time is higher than the second temperature value when the electric valve is just switched from the open state to the closed state, and the first temperature value when running for the first preset time is the same as the third temperature value when running for the first preset time;

[0108] The first temperature value, the second temperature value and the third temperature value when running for a second preset time are the same; wherein the first preset time is less than the second preset time.

[0109] This embodiment is to determine whether the electric valve is blocked when it is closed. The electric valve can switch from the open state to the closed state. The inlet collection point, the valve collection point and the outlet collection point start to collect temperature or collect temperature at a preset frequency, so as to obtain multiple first temperature values, multiple second temperature values ​​and multiple third temperature values ​​of the inlet collection point, the valve collection point and the outlet collection point.

[0110] When the second temperature value when running for the first preset time is higher than the second temperature value when the electric valve is just switched from the open state to the closed state, and the first temperature value when running for the first preset time is the same as the third temperature value when running for the first preset time; due to the electric valve being blocked, the mechanical energy of the electric valve is converted into heat energy, causing the temperature inside the valve to rise for a period of time, and the inlet and outlet of the electric valve are connected, so that the inlet and outlet temperatures are the same, the electric valve is judged to be blocked. In an embodiment, when the electric valve is switched from the open state to the closed state and for the first preset time thereafter, at least the first temperature value, the second temperature value and the third temperature value are collected.

[0111] Or when the first temperature value, the second temperature value and the third temperature value are the same when the second preset time is running; due to the electric valve being blocked, the mechanical energy of the electric valve is converted into heat energy, causing the temperature inside the valve to rise for a period of time; but after continuing to run for the second preset time, after heat dissipation, when the first temperature value, the second temperature value and the third temperature value are the same when the second preset time is running, it means that the electric valve is connected and not closed, and then it is judged that the electric valve is blocked. In some embodiments, when the electric valve is blocked, the second temperature value will rise by about 1.5 degrees Celsius within the second preset time.

[0112] When the first temperature value during the second preset time period is less than the second temperature value and less than the third temperature value, it indicates that the electric valve is in a closed state after executing the closing action, and it is determined that the electric valve is not blocked.

[0113] In the above embodiment, the thermal imager will collect thermal images of the electric valve at least three times, when the state is switched, when the first preset time is reached, and when the second preset time is reached. The first preset time and the second preset time are system-set parameters, for example, the first preset time is 20 seconds, and the second preset time is 1 minute. There is no specific limitation here, and the specific parameters are set according to different refrigerator functions.

[0114] As an optional implementation of the above embodiment, Figure 5 As shown, controlling the electric valve to switch from the first state to the second state includes:

[0115] S420, controlling the electric valve to switch from a closed state to an open state;

[0116] The obtaining of the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve interior collection point and the outlet collection point comprises:

[0117] S520, acquiring a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0118] The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes:

[0119] If any of the following conditions occurs, it is determined that the electric valve has a stall fault:

[0120] The first temperature value when running for a third preset time period is lower than the third temperature value when running for the third preset time period;

[0121] The second temperature value when running for the fourth preset time is higher than the second temperature value when the electric valve just switches from the closed state to the open state, and is higher than the first temperature value when running for the fourth preset time; wherein the third preset time is greater than or equal to the fourth preset time.

[0122] This embodiment is to determine whether the electric valve is blocked when it is opened. The electric valve can switch from the open state to the closed state. The inlet collection point, the valve collection point and the outlet collection point start to collect temperature or collect temperature at a preset frequency, so as to obtain multiple first temperature values, multiple second temperature values ​​and multiple third temperature values ​​of the inlet collection point, the valve collection point and the outlet collection point.

[0123] When the first temperature value when running for the third preset time is less than the third temperature value when running for the third preset time, it means that the refrigerant is not flowing in the valve, that is, the electric valve is not conductive when executing the opening instruction, and the electric valve is blocked.

[0124] The second temperature value during the fourth preset time period is higher than the second temperature value when the electric valve just switches from the closed state to the open state, and is higher than the first temperature value during the fourth preset time period; wherein the third preset time period is greater than or equal to the fourth preset time period. That is, after the electric valve is opened, during a fourth preset time period that is less than or equal to the third preset time period, mechanical energy is converted into thermal energy, the temperature inside the valve rises, and is higher than the first temperature value at the inlet at this moment, indicating that the electric valve is not conducting when executing the opening instruction, and the electric valve is blocked. In some embodiments, when the electric valve is blocked, the second temperature value will rise by about 2 degrees Celsius within the fourth preset time period.

[0125] In the above embodiment, the thermal imager will collect thermal images of the electric valve at least three times, when the state is switched, when the third preset time is used, and when the fourth preset time is used. The third preset time and the fourth preset time are system-set parameters. For example, the fourth preset time is 10 seconds and the third preset time is 1 minute. No specific restrictions are made here. The specific parameters are set according to different refrigerator functions.

[0126] As an optional implementation of the above embodiment, Figure 6 As shown, before acquiring the plurality of first thermal images and acquiring the second thermal image, the stall detection method further includes: S100, controlling the compressor of the refrigerator to start. In the technical solution of the embodiment of the present application, when performing stall detection, the compressor of the refrigerator is in a startup state, so that the refrigerant flows in the refrigeration cycle pipeline of the refrigerator. When the thermal imager collects the thermal image of the electric valve, the refrigerant is in a flowable state.

[0127] The present invention uses thermal imaging and realizes non-invasive detection of refrigerator electric valve faults, without disassembling refrigerator components, reducing detection costs and maintenance difficulties. At the same time, it can quickly and accurately diagnose electric valve faults, which helps to improve the refrigeration efficiency and service life of the compressor.

[0128] In order to better implement the electric valve blocking detection method in the embodiment of the present application, based on the electric valve blocking detection method, the embodiment of the present application also provides an electric valve blocking detection device for a refrigerator, such as Figure 7 As shown, the electric valve jam detection device comprises:

[0129] An acquisition module 10 is used to acquire a plurality of first thermal images; the first thermal images are acquired when the electric valve is not blocked;

[0130] A determination module 20, configured to determine, according to the plurality of first thermal images, the inlet acquisition point positions, the inlet acquisition point positions, and the outlet acquisition point positions corresponding to the inlet, the inlet of the electric valve, and the outlet of the electric valve, respectively;

[0131] The control module 30 is used to control the electric valve to switch from the first state to the second state; and the acquisition module is also used to acquire the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve internal collection point and the outlet collection point;

[0132] The judgment module 40 is further used to judge whether the electric valve has a stall fault according to the first temperature value, the second temperature value and the third temperature value.

[0133] An embodiment of the present application also proposes an electric valve jam detection control system, 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 electric valve jam detection method as described above.

[0134] In general, usually, the control system for electric valve jam detection includes: at least one processor, at least one memory, and a control program for the control system for electric valve jam detection stored in the memory and executable on the processor, and the control program for the control system for electric valve jam detection is configured to implement the steps of the previous electric valve jam detection method.

[0135] 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 control system for detecting electric valve jams, so that the detection method model of the control system for detecting electric valve jams can be trained and learned autonomously to improve efficiency and accuracy.

[0136] 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, 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 electric valve jam detection method of the control system for electric valve jam detection provided in the method embodiment of the present application:

[0137] acquiring a plurality of first thermal images;

[0138] According to the plurality of first thermal images, respectively determining the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve;

[0139] Controlling the electric valve to switch from a first state to a second state;

[0140] Acquire a first temperature value, a second temperature value, and a third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0141] Whether a stall fault occurs in the electric valve is determined according to the first temperature value, the second temperature value, and the third temperature value.

[0142] Optionally, the plurality of first thermal images include a plurality of first thermal images of the electric valves when they are opened and a plurality of first thermal images of the electric valves when they are closed;

[0143] The step of determining, according to the plurality of first thermal images, the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve, respectively, comprises:

[0144] Determining a collection point corresponding to the electric valve according to one of the first thermal images of the plurality of electric valves when the electric valves are opened;

[0145] Determine a plurality of inlet points corresponding to the inlet, a plurality of in-valve points corresponding to the valve, and a plurality of outlet points corresponding to the outlet according to the collection points corresponding to the electric valve and the first thermal images of the plurality of electric valves when they are closed;

[0146] According to the first thermal images of the plurality of electric valves when they are closed, respectively determining an average temperature of an inlet of the electric valve, an average temperature inside the valve, and an average temperature of an outlet of the electric valve;

[0147] The inlet collection point, the valve collection point and the outlet collection point are determined according to the average temperature of the inlet of the electric valve, the average temperature inside the valve and the average temperature of the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

[0148] Optionally, determining the inlet collection point, the valve collection point, and the outlet collection point according to the average temperature of the inlet of the electric valve, the average temperature inside the valve, and the average temperature of the outlet, as well as the multiple inlet points, the multiple valve points, and the multiple outlet points includes:

[0149] Determine one of the multiple entry points that is closest to the average temperature of the entry as the entry collection point;

[0150] Determine one of the multiple points in the valve that is closest to the average temperature in the valve as the sampling point in the valve;

[0151] Determine one of the multiple outlet points that is closest to the average temperature of the outlet as the outlet collection point.

[0152] Optionally, determining the average temperature of the inlet of the electric valve, the average temperature inside the valve, and the average temperature of the outlet according to the plurality of first thermal images further comprises:

[0153] Acquire a second thermal image of the plurality of electric valves when they are closed;

[0154] According to the first thermal image and the second thermal image of the plurality of electric valves when they are closed, respectively updating an average temperature at an inlet of the electric valve, an average temperature inside the valve, and an average temperature at an outlet of the electric valve;

[0155] According to the average temperature of the inlet of the electric valve, the average temperature in the valve, and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points, and the multiple outlet points, determining the inlet collection points, the valve collection points, and the outlet collection points includes:

[0156] The inlet collection point, the valve collection point and the outlet collection point are determined according to the updated average temperature of the inlet of the electric valve, the average temperature inside the valve and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

[0157] Optionally, controlling the electric valve to switch from the first state to the second state includes:

[0158] Controlling the electric valve to switch from an open state to a closed state;

[0159] Acquiring the first temperature value, the second temperature value, and the third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point includes:

[0160] Acquire a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0161] The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes:

[0162] If any of the following conditions occurs, it is determined that the electric valve has a stall fault:

[0163] The second temperature value when running for the first preset time is higher than the second temperature value when the electric valve is just switched from the open state to the closed state, and the first temperature value when running for the first preset time is the same as the third temperature value when running for the first preset time;

[0164] The first temperature value, the second temperature value and the third temperature value when running for a second preset time are the same; wherein the first preset time is less than the second preset time.

[0165] Optionally, controlling the electric valve to switch from the first state to the second state includes:

[0166] Controlling the electric valve to switch from a closed state to an open state;

[0167] The obtaining of the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve interior collection point and the outlet collection point comprises:

[0168] Acquire a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point;

[0169] The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes:

[0170] If any of the following conditions occurs, it is determined that the electric valve has a stall fault:

[0171] The first temperature value when running for a third preset time period is lower than the third temperature value when running for the third preset time period;

[0172] The second temperature value when running for the fourth preset time is higher than the second temperature value when the electric valve just switches from the closed state to the open state, and is higher than the first temperature value when running for the fourth preset time; wherein the third preset time is greater than or equal to the fourth preset time.

[0173] Optionally, before acquiring the plurality of first thermal images and acquiring the second thermal image, the stall detection method further includes:

[0174] Controlling the compressor of the refrigerator to start.

[0175] The above is a detailed introduction to a refrigerator and its electric valve jam detection method, device and computer-readable storage medium provided in the embodiments 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 blocked electric valve of a refrigerator, characterized in that: The refrigerator further comprises a thermal imager, wherein the thermal imager is configured to collect a thermal image of the electric valve; and the detection method comprises: acquiring a plurality of first thermal images; According to the plurality of first thermal images, respectively determining the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve; Controlling the electric valve to switch from a first state to a second state; Acquire a first temperature value, a second temperature value, and a third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point; Whether a stall fault occurs in the electric valve is determined according to the first temperature value, the second temperature value, and the third temperature value.

2. The electric valve stall detection method according to claim 1, characterized in that: The plurality of first thermal images include a plurality of first thermal images of the electric valves when they are opened and a plurality of first thermal images of the electric valves when they are closed; The step of determining, according to the plurality of first thermal images, the inlet acquisition points, the inlet acquisition points and the outlet acquisition points corresponding to the inlet, the inlet and the outlet of the electric valve, respectively, comprises: Determining a collection point corresponding to the electric valve according to one of the first thermal images of the plurality of electric valves when the electric valves are opened; Determine a plurality of inlet points corresponding to the inlet, a plurality of in-valve points corresponding to the valve, and a plurality of outlet points corresponding to the outlet according to the collection points corresponding to the electric valve and the first thermal images of the plurality of electric valves when they are closed; According to the first thermal images of the plurality of electric valves when they are closed, respectively determining an average temperature of an inlet of the electric valve, an average temperature inside the valve, and an average temperature of an outlet of the electric valve; The inlet collection point, the valve collection point and the outlet collection point are determined according to the average temperature of the inlet of the electric valve, the average temperature inside the valve and the average temperature of the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

3. The electric valve stall detection method according to claim 2, characterized in that: Determining the inlet collection point, the valve collection point, and the outlet collection point according to the average temperature of the inlet of the electric valve, the average temperature in the valve, and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points, and the multiple outlet points includes: Determine one of the multiple entry points that is closest to the average temperature of the entry as the entry collection point; Determine one of the multiple points in the valve that is closest to the average temperature in the valve as the sampling point in the valve; Determine one of the multiple outlet points that is closest to the average temperature of the outlet as the outlet collection point.

4. The electric valve stall detection method according to claim 2, characterized in that: The step of determining the average temperature of the inlet of the electric valve, the average temperature inside the valve, and the average temperature of the outlet of the electric valve according to the plurality of first thermal images further comprises: Acquire a second thermal image of the plurality of electric valves when they are closed; According to the first thermal image and the second thermal image of the plurality of electric valves when they are closed, respectively updating an average temperature at an inlet of the electric valve, an average temperature inside the valve, and an average temperature at an outlet of the electric valve; According to the average temperature of the inlet of the electric valve, the average temperature in the valve, and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points, and the multiple outlet points, determining the inlet collection points, the valve collection points, and the outlet collection points includes: The inlet collection point, the valve collection point and the outlet collection point are determined according to the updated average temperature of the inlet of the electric valve, the average temperature inside the valve and the average temperature at the outlet, as well as the multiple inlet points, the multiple valve points and the multiple outlet points.

5. The electric valve stall detection method according to claim 1, characterized in that: The controlling the electric valve to switch from the first state to the second state comprises: Controlling the electric valve to switch from an open state to a closed state; Acquiring the first temperature value, the second temperature value, and the third temperature value of the inlet collection point, the valve interior collection point, and the outlet collection point includes: Acquire a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point; The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes: If any of the following conditions occurs, it is determined that the electric valve has a stall fault: The second temperature value when running for the first preset time is higher than the second temperature value when the electric valve is just switched from the open state to the closed state, and the first temperature value when running for the first preset time is the same as the third temperature value when running for the first preset time; The first temperature value, the second temperature value and the third temperature value when running for a second preset time are the same; wherein the first preset time is less than the second preset time.

6. The electric valve stall detection method according to claim 1, characterized in that: The controlling the electric valve to switch from the first state to the second state comprises: Controlling the electric valve to switch from a closed state to an open state; The obtaining of the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve interior collection point and the outlet collection point comprises: Acquire a plurality of first temperature values, a plurality of second temperature values, and a plurality of third temperature values ​​of the inlet collection point, the valve interior collection point, and the outlet collection point; The determining whether the electric valve has a stall fault according to the first temperature value, the second temperature value, and the third temperature value includes: If any of the following conditions occurs, it is determined that the electric valve has a stall fault: The first temperature value when running for a third preset time period is lower than the third temperature value when running for the third preset time period; The second temperature value when running for the fourth preset time is higher than the second temperature value when the electric valve just switches from the closed state to the open state, and is higher than the first temperature value when running for the fourth preset time; wherein the third preset time is greater than or equal to the fourth preset time.

7. The electric valve stall detection method according to any one of claims 1 to 6, characterized in that: Before acquiring the plurality of first thermal images and acquiring the second thermal image, the stall detection method further includes: Controlling the compressor of the refrigerator to start.

8. A refrigerator electric valve stall detection device, characterized in that: The refrigerator further comprises a thermal imager, wherein the thermal imager is configured to capture a thermal image of the electric valve; The detection device comprises: An acquisition module, used for acquiring a plurality of first thermal images; the first thermal images are acquired when the electric valve is not blocked; A determination module, configured to determine, according to the plurality of first thermal images, an inlet acquisition point, an inlet acquisition point, and an outlet acquisition point corresponding to the inlet, the inlet of the electric valve, and the outlet of the electric valve; A control module, used for controlling the electric valve to switch from a first state to a second state; and the acquisition module is further used for acquiring the first temperature value, the second temperature value and the third temperature value of the inlet collection point, the valve internal collection point and the outlet collection point; The judgment module is further used to judge whether the electric valve has a stall fault according to the first temperature value, the second temperature value and the third temperature value.

9. A refrigerator, characterized in that: It comprises an electric valve, a thermal imager and a controller; the thermal imager is configured to collect a thermal image of the electric valve; the controller is signal-connected to the electric valve and the thermal imager respectively, and the controller is configured to execute to implement the electric valve jam detection method described in any one of claims 1 to 7.

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

Images