Fault detection method for refrigerator, refrigerator, and computer storage medium

Abstract

The present invention discloses a refrigerator fault detection method, a refrigerator, and a computer storage medium, and relates to the technical field of refrigerators. The refrigerator fault detection method specifically includes the following steps: S1: obtaining the current damper state; S2: adjusting the damper to a state opposite to the current damper state; S3: after a predetermined delay, obtaining the first temperature change value of the corresponding compartment within the predetermined time, and judging whether the first temperature change value falls within a preset range corresponding to the damper state; S4: when the first temperature change value does not fall within the preset range, heating the damper for a preset time, recording the number of heating times, and when the number of heating times meets the preset number of times, returning to step S3; S5: when the number of heating times does not meet the preset conditions, outputting a fault prompt. It is intended to avoid false alarms caused by icing during the process of damper abnormality detection and improve user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a refrigerator fault detection method, a refrigerator, and a computer storage medium. Background Art

[0002] For the electric air damper of a common refrigerator, its stepper motor can only rotate the corresponding number of steps and angles according to the instructions of the main control board. The stepper motor has no position sensor and cannot feedback the position and angle of the motor shaft. When the air damper fails to act due to various reasons and the stepper motor idles, since the refrigerator control system cannot detect whether the electric air damper has opened or closed according to the signal, the refrigeration system will still operate according to the command of the main control board, resulting in abnormal refrigeration in the controlled storage compartment: when the air damper should be closed but is not closed, the inside of the refrigerator will be supercooled and the stored items will be frozen; when the air damper should be opened but is not opened, the refrigerator will not refrigerate, causing the food stored by the user to be frozen due to low temperature or spoiled due to high temperature.

[0003] To solve the above technical problems, currently, the state of the current air damper of the compartment is often changed, and then the temperature change in the corresponding detection is detected to determine whether the air damper of the refrigerator is abnormal. Since it is a common situation that the air damper cannot open and close normally due to icing, which belongs to a minor abnormality, this situation is not excluded in the existing detection process, resulting in inaccurate refrigerator fault reporting and affecting the user experience.

[0004] How to avoid false alarms caused by icing during the air damper abnormality detection process and improve the user experience has become an urgent technical problem to be solved. Summary of the Invention

[0005] The main object of the present invention is to provide a refrigerator fault detection method, a refrigerator, and a computer storage medium, aiming to avoid false alarms caused by icing during the air damper abnormality detection process and improve the user experience.

[0006] To achieve the above object, the present invention proposes a refrigerator fault detection method, including the following steps:

[0007] S1: Obtain the current state of the air damper;

[0008] S2: And adjust the air damper to a state opposite to the current air damper state;

[0009] S3: After delaying for a predetermined time, obtain the first temperature change value of the corresponding compartment within the predetermined time, and determine whether the first temperature change value falls within a preset range corresponding to the air damper state;

[0010] S4: When the first temperature change value does not fall within the preset range, heat the air damper for a preset duration, record the number of heating times, and when the number of heating times meets the preset number, return to step S3;

[0011] S5: When the number of heating times does not meet the preset number, output a fault prompt.

[0012] In an embodiment of the present application, before obtaining the air damper state, it further includes:

[0013] Obtain the temperature parameter of the refrigerator compartment, calculate the difference between the temperature parameter and the preset temperature parameter, and when the difference between the first temperature parameter and the preset temperature parameter does not fall within the second preset range, execute step S1.

[0014] In an embodiment of the present application, when the difference between the first temperature parameter and the preset temperature parameter falls within the second preset range, keep the refrigerator running normally.

[0015] In an embodiment of the present application, the air damper state includes: an open state and a closed state.

[0016] In an embodiment of the present application, when the first temperature change value falls within the first preset range, resume the normal operation of the refrigerator.

[0017] In an embodiment of the present application, during the delay of a predetermined time, the number of times the compartment door is opened and / or the opening time are collected in real time;

[0018] When the number of times the door is opened is greater than the preset number or the opening time is greater than the set time, after the compartment door is closed, recalculate the delay of the predetermined time.

[0019] The present application also discloses a refrigerator, which performs fault detection by using the fault detection method of the refrigerator described in any one of the above.

[0020] The present application also discloses a computer storage medium, which stores multiple instructions, and the instructions are suitable for being loaded and executed by a processor to perform the fault detection method of the refrigerator described in any one of the above.

[0021] With the above technical solution, first obtain the current damper state, and then correspondingly adjust the damper to a state opposite to the current damper state, that is, perform an inverse operation on the damper state. Then determine whether the corresponding first temperature change value falls within a preset range. If the first temperature change value falls within the predicted range, it indicates that the current damper is operating well and no defrosting operation is required. If the first temperature change value does not fall within the predicted range, it indicates that the damper may be frozen. Correspondingly, start the heating element to heat the damper, so that the ice blocking the damper melts and the damper enters the normal control state. When starting the heating element to heat the damper, a heating duration will be set. When the heating duration is reached, a temperature detection is performed, and then the temperature change value is judged. The heating is repeated multiple times. When the number of heating times does not meet the preset conditions, it indicates that the damper is still out of control after multiple heating operations. At this time, a fault prompt is output to avoid abnormal false alarms of the damper caused by icing and improve the user experience. Description of the Drawings

[0022] The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings, where:

[0023] Figure 1 It is a schematic flowchart of the first embodiment of the present invention. Detailed Embodiments

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not limit the present invention.

[0025] As Figure 1 shown, in order to achieve the above objectives, the present invention proposes a fault detection method for a refrigerator, including the following steps:

[0026] S1: Obtain the current damper state;

[0027] S2: And adjust the damper to a state opposite to the current damper state;

[0028] S3: After a predetermined time delay, obtain the first temperature change value of the corresponding compartment within the predetermined time, and determine whether the first temperature change value falls within a preset range corresponding to the damper state;

[0029] S4: When the first temperature change value does not fall within the preset range, heat the damper for a preset duration, record the number of heating times. When the number of heating times meets the preset number of times, return to step S3;

[0030] S5: When the number of heating times does not meet the preset number of times, output a fault prompt.

[0031] Specifically, a refrigerator fault detection method includes the following steps:

[0032] First, obtain the current damper state. The damper state includes open or closed. After obtaining the damper state, convert the current damper state into a state opposite to the current damper state. For example, when the current damper state is the open state, adjust the open state to the opposite state, which is the closed state. When the current damper state is the closed state, adjust the closed state to the opposite state, which is the open state.

[0033] When the damper state is the open state, the preset range corresponding to the damper state is the first preset range. Adjust the damper to the state opposite to the current damper state. At this time, the damper is in the closed state. Then make the refrigerator in a normal working state, and the compressor and the fan motor move in a predetermined manner. For example, the preset speed range of the compressor is set to 3800 rpm to 4200 rpm, and the speed range of the fan motor is set to 1500 rpm to 1800 rpm. After the refrigerator works normally for a predetermined time, detect the first temperature change value of the corresponding compartment before and after the damper is closed within the predetermined time through the temperature sensor, and judge whether the first temperature change value falls within the first preset range. When the first temperature change value falls within the first preset range, it indicates that the damper is already in the closed state, and the corresponding damper has no abnormality, thereby realizing the normal operation of the refrigerator and the normal control of the damper. The first temperature change value in this application refers to the temperature difference before and after the refrigerator temperature after the refrigerator has been running for a period of time.

[0034] When the first temperature change value does not fall within the first preset range, it indicates that there is an abnormality in the damper control of the refrigerator. There are many types of abnormalities that occur, such as motor damage, damper jamming, gear necrosis, etc. Of course, it may also be that the damper freezes, resulting in the damper being unable to open or close normally.

[0035] At this time, heat the damper. The heating is carried out by the commonly used resistance heating method in the prior art to melt the ice on the damper. After heating for a preset duration, the preset duration in this application can be 10 minutes. After completing the heating, synchronously count the heating times, such as adding one to the original data. After recording the heating times, then judge whether the heating times meet the preset times. When the heating times meet the preset times, return to step S3 to re-judge the temperature.

[0036] When the heating times do not meet the preset conditions, directly output the damper fault.

[0037] When the damper is in the closed state, the preset range corresponding to the damper state is the third preset range. Adjust the damper to the state opposite to the current damper state. At this time, the damper is in the open state. Then, make the refrigerator in a normal working state, and the compressor and the fan motor move in a predetermined manner. For example, the preset speed range of the compressor is set to 3800 rpm to 4200 rpm, and the speed range of the fan motor is set to 1500 rpm to 1800 rpm. After the refrigerator has been working normally for a predetermined time, detect the first temperature change value of the corresponding compartment before and after the damper is opened within the predetermined time through the temperature sensor, and determine whether the first temperature change value falls within the third preset range. When the first temperature change value falls within the third preset range, it indicates that the damper is already in the closed state and the corresponding damper is normal, thus realizing the normal operation of the refrigerator and the normal control of the damper. The first temperature change value in this application refers to the temperature difference between the front and back temperatures of the refrigerator after the refrigerator has been running for a period of time.

[0038] When the first temperature change value does not fall within the third preset range, it indicates that there is an abnormality in the damper control of the refrigerator. There are many types of abnormalities that occur, such as motor damage, damper jamming, gear necrosis, and so on. Of course, it may also be because the damper freezes, resulting in the damper being unable to close or close properly.

[0039] At this time, heat the damper. The heating is carried out by the commonly used resistance heating method in the prior art to melt the ice on the damper. After heating for a preset duration, the preset duration in this application can be 10 minutes. After the heating is completed, synchronously count the number of heating times, for example, add one to the original data. Complete the recording of the number of heating times, and then determine whether the number of heating times meets the preset number. When the number of heating times meets the preset number, return to step S3 to re-judge the temperature.

[0040] When the number of heating times does not meet the preset conditions, directly output a damper failure.

[0041] With the above technical solution, first obtain the current damper state, and then correspondingly adjust the damper to a state opposite to the current damper state, that is, perform an inverse operation on the damper state. Then determine whether the corresponding first temperature change value falls within a preset range. If the first temperature change value falls within the predicted range, it indicates that the current damper is operating well and no defrosting operation is required. If the first temperature change value does not fall within the predicted range, it indicates that the damper may be frozen. Correspondingly, start the heating element to heat the damper, so that the ice freezing the damper melts and the damper enters the normal control state. When starting the heating element to heat the damper, a heating duration will be set. When the heating duration is reached, a temperature detection will be performed, and then the temperature change value will be judged. Heat will be repeated multiple times. When the number of heating times does not meet the preset conditions, it indicates that the damper is still out of control after multiple heating operations. At this time, a fault prompt will be output to avoid abnormal false alarms of the damper caused by icing and improve the user experience.

[0042] In an embodiment of the present application, before obtaining the damper state, it further includes:

[0043] Obtain the temperature parameter of the refrigerator compartment, and calculate the difference between the temperature parameter and the preset temperature parameter. When the difference between the first temperature parameter and the preset temperature parameter does not fall within the second preset range, execute step S1.

[0044] Specifically, before obtaining the state of the damper, first obtain the temperature parameter of the refrigerator compartment, then calculate the difference between the temperature parameter and the preset temperature parameter, and judge whether the difference falls within the second preset range. If the difference falls within the second preset range, it indicates that the refrigeration control of the current refrigerator compartment is good. If the difference does not fall within the second preset range, it indicates that the refrigeration control of the current refrigerator compartment is abnormal. The most common way to occur in such a situation is a damper failure. At this time, execute step S1;

[0045] With the above technical solution, by detecting the difference between the temperature parameter of the refrigerator compartment and the preset temperature parameter, and then judging whether the difference falls within the second preset range, step S1 is started, avoiding the continuous operation of the refrigerator fault detection method, reducing energy consumption, with a simple process and easy to implement.

[0046] In an embodiment of the present application, when the difference between the first temperature parameter and the preset temperature parameter falls within the second preset range, keep the refrigerator running normally.

[0047] Specifically, when the difference between the first temperature parameter and the preset temperature parameter falls within the second predicted range, it indicates that the current refrigerator is operating normally and no operation is required.

[0048] Illustrate with examples as follows:

[0049] The preset temperature parameter is 4°C, and the temperature in the refrigerator compartment is 5°C. At this time, the difference between the first temperature parameter and the preset temperature parameter is 1°C. The second preset range is from 1°C to 2°C. At this time, 1°C clearly falls within the second preset range, indicating that the refrigerator is refrigerating normally. No operation is performed at this time.

[0050] With the above technical solution, when the difference between the first temperature parameter and the preset temperature parameter falls within the second preset range, no operation is performed, reducing the energy consumption of the system. The process is simple and easy to implement.

[0051] In an embodiment of the present application, the damper state includes: an open state and a closed state.

[0052] Specifically, the damper state includes an open state and a closed state. As is known to those skilled in the art, there are only two states for the adjustment of the damper, the fully open state and the fully closed state. Due to its attributes of full opening and full closing, it is more convenient to detect the damper state, improving the stability and accuracy of the damper state detection.

[0053] In an embodiment of the present application, when the first temperature change value falls within the first preset range, the normal operation of the refrigerator is restored.

[0054] Specifically, when the first temperature change value falls within the first preset range, it indicates that the temperature of the current refrigerator compartment is normal, and at this time, the normal control of the refrigerator is restored.

[0055] With the above technical solution, the process is simple and easy to implement.

[0056] In an embodiment of the present application, during the delay of a predetermined time, the number of times the compartment door is opened and / or the opening time are collected in real time;

[0057] When the number of door openings is greater than the preset number or the opening time is greater than the set time, after the compartment door is closed, the delay of the predetermined time is recalculated.

[0058] Specifically, frequent opening and closing of the door will cause the loss of cold in the refrigerator compartment, or too long a single opening time will also cause serious loss of cold in the refrigerator compartment. At this time, during the delay of the predetermined time, the number of door openings and / or the opening time are collected in real time.

[0059] When the number of door openings is greater than the preset number or the single opening time is greater than the set time, after the door of the compartment is closed, the delay of the predetermined time is recalculated. The accuracy of the obtained first temperature change value can be improved. Thus, the damper fault detection result is more accurate.

[0060] The present application also discloses a refrigerator, which performs fault detection by using the fault detection method of the refrigerator described in any one of the above.

[0061] The present application also discloses a computer storage medium storing a plurality of instructions adapted to be loaded and executed by a processor to perform the refrigerator fault detection method as described in any one of the above.

[0062] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A refrigerator fault detection method, characterized in that: The following steps are involved: S1: Get the current damper status; S2: and adjust the damper to a state opposite to the current damper state; S3: after a predetermined delay, obtaining a first temperature change value of the corresponding compartment within the predetermined time, and determining whether the first temperature change value falls within a preset range corresponding to the damper state; S4: When the first temperature change value does not fall within the preset range, the damper is heated for a preset time, and the number of heating times is recorded. When the number of heating times meets the preset number, the process returns to step S3; S5: When the heating times do not meet the preset times, a fault prompt is output.

2. The refrigerator fault detection method according to claim 1, characterized in that: Before obtaining the damper status, it also includes: The temperature parameter of the refrigerator compartment is obtained, and the difference between the temperature parameter and the preset temperature parameter is calculated. When the difference between the first temperature parameter and the preset temperature parameter does not fall within the second preset range, step S1 is executed.

3. The refrigerator fault detection method according to claim 2, characterized in that: When the difference between the first temperature parameter and the preset temperature parameter falls within the second preset range, the refrigerator is kept operating normally.

4. The refrigerator fault detection method according to claim 1, characterized in that: The damper state includes: an open state and a closed state.

5. The refrigerator fault detection method according to claim 1, characterized in that: When the first temperature change value falls within a first preset range, the refrigerator is restored to normal operation.

6. The refrigerator fault detection method according to claim 1, characterized in that: During the time delay, the number of times and / or time the door is opened in the room is collected in real time; When the number of door openings is greater than the preset number or the door opening time is greater than the set time, the delay preset time is recalculated after the compartment door is closed.

7. A refrigerator, characterized in that: Fault detection is performed using the refrigerator fault detection method as described in any one of claims 1 to 6.

8. A computer storage medium, characterized in that: It stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the refrigerator fault detection method as described in any one of claims 1 to 6.

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