Refrigerator, fault identification method and device for refrigerating system of refrigerator and storage medium
By obtaining the temperature difference between the evaporator's inlet and outlet, combined with preset values and time duration, faults in the refrigerator's refrigeration system can be identified. This solves the problem of faults that are difficult to detect during use during the commercial inspection stage, and improves the reliability and fault handling efficiency of the refrigerator's refrigeration system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TCL HOME APPLIANCES (HEFEI) CO LTD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-05-12
AI Technical Summary
Existing technologies make it difficult to identify faults in the refrigerator's refrigeration system during the usage phase, especially during the commercial inspection stage, where problems during use are difficult to detect.
By acquiring the inlet and outlet temperatures of the evaporator and using the difference between preset values and preset durations, the fault types of the refrigerator's refrigeration system can be identified, including the first fault (insufficient refrigerant or low refrigerant purity), the second fault (compressor oil clogging the evaporator pipes), and the third fault (no refrigerant).
It enables accurate identification of refrigerator refrigeration system faults during use, improves the reliability of the refrigeration system and the efficiency of fault handling, and can promptly detect problems such as insufficient refrigerant, insufficient purity, or evaporator pipe blockage.
Smart Images
Figure CN122015410A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of refrigerator technology, and in particular to a method, device and storage medium for fault identification of a refrigerator and its refrigeration system. Background Technology
[0002] With the continuous development of science and technology, refrigerators have also undergone digital and intelligent upgrades to meet user needs. The refrigerator's refrigeration system is a crucial component for its functionality. This system includes a compressor, condenser, throttling device, and evaporator, as well as refrigerant piping connecting these components. Refrigerant flows through these piping. After the refrigerator is assembled, the refrigeration system requires commercial inspection. However, since this inspection is conducted during the production phase, it's difficult to detect malfunctions that occur during use. Therefore, identifying malfunctions in the refrigerator's refrigeration system during use has become a technical problem that needs to be solved in this field. Summary of the Invention
[0003] This application provides a method, apparatus, and storage medium for fault identification of a refrigerator and its refrigeration system, which are designed to identify faults in the refrigerator's refrigeration system during the usage phase.
[0004] In a first aspect, this application proposes a fault identification method for a refrigerator refrigeration system, the refrigeration system including a compressor and an evaporator; the fault identification method includes:
[0005] Control the compressor operation; Obtain the inlet temperature and outlet temperature of the evaporator; When the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and persists for a first preset duration, a first fault type is determined to have occurred in the refrigerator's refrigeration system; and / or When the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value, a second fault type is determined to have occurred in the refrigerator refrigeration system; wherein the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or When the outlet temperature and the inlet temperature are greater than the second preset value, the refrigerator refrigeration system is determined to have a third fault type.
[0006] Optionally, the fault identification method includes: Determine whether the outlet temperature and the inlet temperature are greater than a second preset value; If the outlet temperature and the inlet temperature are not greater than the second preset value, then determine whether the difference between the outlet temperature and the inlet temperature is less than the fourth preset value; If the difference between the outlet temperature and the inlet temperature is not less than a fourth preset value, then it is determined whether the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value.
[0007] Optionally, the fault identification method further includes: If the difference between the outlet temperature and the inlet temperature is less than the fourth preset value, then it is determined that the outlet temperature and the inlet temperature are between the second preset value and the third preset value.
[0008] Optionally, obtaining the inlet temperature and outlet temperature of the evaporator includes: After confirming that the compressor has started effectively, the inlet temperature and outlet temperature of the evaporator are obtained.
[0009] Optionally, the fault identification method further includes: After the difference between the outlet temperature and the inlet temperature first becomes greater than or equal to a first preset value, the frequency of obtaining the outlet temperature and inlet temperature of the evaporator is increased.
[0010] Optionally, the fault identification method further includes: within a second preset time period, if the frequency of occurrence of the difference between the outlet temperature and the inlet temperature being greater than or equal to a first preset value exceeds a set frequency, determining that the refrigerator refrigeration system has a first fault type; wherein, the second preset time period is longer than the first preset time period.
[0011] Optionally, the fault identification method further includes: acquiring the ambient temperature; and determining the second preset value based on the ambient temperature.
[0012] Secondly, this application also proposes a fault identification device for a refrigerator refrigeration system, the refrigeration system including a compressor and an evaporator; the fault identification device includes: The control module is used to control the operation of the compressor; The acquisition module is used to acquire the inlet temperature and outlet temperature of the evaporator; The determination module is configured to determine a first fault type in the refrigerator refrigeration system when the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and persists for a preset duration; and / or determine a second fault type in the refrigerator refrigeration system when the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value; wherein the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or determine a third fault type in the refrigerator refrigeration system when the outlet temperature and the inlet temperature are greater than the second preset value.
[0013] Thirdly, this application also proposes a refrigerator, including a controller for performing the fault identification method for the refrigerator refrigeration system as described above.
[0014] Fourthly, this application also proposes a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in the fault identification method for the refrigerator refrigeration system as described above.
[0015] Technical Effects: In the technical solution of this application embodiment, after the compressor starts running, the refrigerant begins to circulate in the refrigeration system. The inlet and outlet temperatures of the evaporator are obtained. The following conditions are used to determine the fault type of the refrigerator refrigeration system: When the difference between the outlet and inlet temperatures is greater than or equal to a first preset value and lasts for a first preset duration, the refrigerant after passing through the evaporator experiences an abnormally high temperature for a period of time, indicating a first fault type in the refrigerator refrigeration system. When the outlet and inlet temperatures are between a second and a third preset value, and the difference between them is less than a fourth preset value, a second fault type is determined. In this case, the compressor oil blocks the evaporator pipe, which may be due to abnormal oil discharge from the compressor unit or an abnormal structure of the oil return hole in the liquid receiver after the evaporator. When the outlet and inlet temperatures are greater than the second preset value, there is no refrigerant in the refrigeration system, and refrigeration is impossible, indicating a third fault type in the refrigerator refrigeration system. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0017] Figure 1 A flowchart illustrating the first embodiment of the fault identification method for a refrigerator refrigeration system provided in this application. Figure 2 A flowchart illustrating a second embodiment of the fault identification method for a refrigerator refrigeration system provided in this application. Figure 3 A schematic flowchart of the third embodiment of the fault identification method for a refrigerator refrigeration system provided in this application; Figure 4 A schematic flowchart of the fourth embodiment of the fault identification method for a refrigerator refrigeration system provided in this application; Figure 5 This is a schematic diagram of the structure of a fault identification device for a refrigerator refrigeration system provided in an embodiment of this application. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0020] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.
[0021] The refrigerator refrigeration system includes a compressor, a condenser, a throttling device, and an evaporator, as well as refrigerant piping connecting the compressor, condenser, throttling device, and evaporator. The refrigerator also includes a controller for controlling the operation of the refrigeration system. In the technical solution of this application embodiment, the controller is also used to perform steps in the fault identification method of the refrigerator refrigeration system.
[0022] The following reference Figures 1 to 4 Examples of fault identification methods, apparatuses, and computer-readable storage media for refrigerator refrigeration systems provided in embodiments of this application.
[0023] Before providing examples, the terms used in this application are defined as follows: Inlet temperature: T in .
[0024] Outlet temperature: T out .
[0025] First preset value: T1; In some embodiments, the first preset value is 4-6℃, for example, 5℃.
[0026] Second preset value: T2; In some embodiments, the second preset value is 4-6°C lower than the ambient temperature, for example, the ambient temperature is -5°C.
[0027] Third preset value: T3; In some embodiments, the third preset value is -22℃ to 18℃, for example, -20℃.
[0028] Fourth preset value: T4; In some embodiments, the third preset value is 2-3℃, for example, 3℃.
[0029] Ambient temperature: T 环 .
[0030] First, refer to Figure 1 , Figure 2 and Figure 3 As shown in the embodiments of this application, the fault identification method for a refrigerator refrigeration system includes: S100 controls the operation of the compressor; S200, obtain the inlet temperature and outlet temperature of the evaporator; S310, when the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and persists for a first preset duration, it is determined that the refrigerator refrigeration system has encountered a first fault type; and / or S320, when the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value, a second fault type is determined to have occurred in the refrigerator refrigeration system; wherein, the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or S330, when the outlet temperature and the inlet temperature are greater than the second preset value, it is determined that the refrigerator refrigeration system has a third fault type.
[0031] In the technical solution of this application embodiment, after the compressor starts running, the refrigerant begins to circulate in the refrigeration system. The inlet and outlet temperatures of the evaporator are obtained. The following conditions are used to determine the fault type of the refrigerator refrigeration system: When the difference between the outlet and inlet temperatures is greater than or equal to a first preset value and lasts for a first preset duration, the refrigerant after passing through the evaporator experiences an abnormally high temperature for a period of time, indicating a first fault type in the refrigerator refrigeration system. When the outlet and inlet temperatures are between a second and a third preset value, and the difference between them is less than a fourth preset value, a second fault type is determined. In this case, the compressor oil blocks the evaporator pipe, which may be due to abnormal oil discharge from the compressor unit or an abnormal structure of the oil return hole in the liquid receiver after the evaporator. When the outlet and inlet temperatures are greater than the second preset value, there is no refrigerant in the refrigeration system, and refrigeration is impossible, indicating a third fault type in the refrigerator refrigeration system.
[0032] During refrigerator inspection, minor leaks in the refrigeration system piping or refrigerant filling deviations are difficult to detect. However, during normal use, if the difference between the outlet and inlet temperatures exceeds a first preset value and persists for a first preset duration, minor leaks or refrigerant reductions due to manufacturing deviations during vacuuming or refrigerant filling are detected. Insufficient refrigerant or low refrigerant purity can easily lead to slow cooling efficiency, insufficient cooling capacity, and high compartment temperatures even under high ambient temperatures. Therefore, this fault identification method effectively detects insufficient refrigerant or low refrigerant purity, allowing for rapid intervention and improving refrigerator refrigeration reliability.
[0033] When the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value, the refrigerator refrigeration system is determined to have a second type of fault. In this case, the compressor oil is blocking the evaporator pipes. This may be caused by abnormal oil discharge from the compressor unit or by an abnormal structure of the oil return hole in the liquid receiver after the evaporator. When the evaporator pipes are blocked by oil, it cannot be detected during commercial inspection. Therefore, by collecting the outlet and inlet temperatures during use, the second type of fault can be identified.
[0034] In the embodiment, if a third type of failure occurs, it indicates that there is no refrigerant in the refrigeration system (it should be understood that this does not mean there is no refrigerant at all, but rather that the amount of refrigerant is insufficient to allow it to circulate in the refrigeration system). This situation is usually caused by refrigerant leakage due to corrosion of the pipes.
[0035] Combination Figure 4 As shown, as an optional implementation of the above embodiments, the fault identification method includes: Determine whether the outlet temperature and the inlet temperature are greater than a second preset value; If the outlet temperature and the inlet temperature are not greater than the second preset value, then determine whether the difference between the outlet temperature and the inlet temperature is less than the fourth preset value; If the difference between the outlet temperature and the inlet temperature is not less than a fourth preset value, then it is determined whether the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value.
[0036] In this embodiment, upon obtaining the outlet temperature and the inlet temperature, it is first determined whether the outlet temperature and the inlet temperature are greater than a second preset value; if so, it is determined that the refrigerator refrigeration system has encountered a third fault type; if not, it indicates that there is refrigerant in the refrigeration system; then, it is further determined whether the refrigerator has encountered a second fault type, that is, if the outlet temperature and the inlet temperature are not greater than the second preset value, it is determined whether the difference between the outlet temperature and the inlet temperature is less than a fourth preset value; if not, it is further determined whether the refrigerator has encountered a first fault type, that is, if the difference between the outlet temperature and the inlet temperature is not less than the fourth preset value, it is further determined whether the difference between the outlet temperature and the inlet temperature is greater than or equal to the first preset value.
[0037] As an optional implementation of the above embodiments, the fault identification method further includes: If the difference between the outlet temperature and the inlet temperature is less than the fourth preset value, then it is determined whether the outlet temperature and the inlet temperature are between the second preset value and the third preset value.
[0038] In an embodiment, if the difference between the outlet temperature and the inlet temperature is less than the fourth preset value, it is further determined that the outlet temperature and the inlet temperature are between the second preset value and the third preset value; if so, it is determined that the refrigerator refrigeration system has a second fault type.
[0039] In some embodiments, when the above conditions do not occur at the outlet and inlet temperatures, the outlet and inlet temperatures are monitored in real time.
[0040] As an optional implementation of the above embodiments, obtaining the inlet temperature and outlet temperature of the evaporator includes: After confirming that the compressor has started effectively, the inlet temperature and outlet temperature of the evaporator are obtained.
[0041] In some technical solutions of this application embodiment, the inlet temperature and outlet temperature of the evaporator are acquired after the compressor is effectively started. At this time, the refrigerant circulation of the refrigerator refrigeration system is effective, and the identification of fault type at this stage is reliable.
[0042] In this embodiment, the effective start-up of the compressor can be determined by the compressor's operating parameters, such as speed, power, and electrical parameters.
[0043] As an optional implementation of the above embodiments, the fault identification method further includes: After the difference between the outlet temperature and the inlet temperature first becomes greater than or equal to a first preset value, the frequency of obtaining the outlet temperature and inlet temperature of the evaporator is increased.
[0044] In the technical solution of this application embodiment, when the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value for the first time, the refrigerator refrigeration system may experience a reduction in refrigerant or insufficient purity. At this time, the acquisition frequency of the outlet temperature and inlet temperature of the evaporator can be increased to improve the accuracy of fault identification.
[0045] As an optional implementation of the above embodiments, the fault identification method further includes: within a second preset time period, if the frequency of occurrence of the difference between the outlet temperature and the inlet temperature being greater than or equal to a first preset value exceeds a set frequency, determining that the refrigerator refrigeration system has a first fault type; wherein, the second preset time period is longer than the first preset time period.
[0046] In some technical solutions of this application, due to fluctuations in temperature acquisition (such as fluctuations in the outlet and inlet temperatures of the evaporator caused by human activity), the situation where the difference between the outlet temperature and the inlet temperature is greater than or equal to the first preset value is not continuous within a first preset time period. Therefore, in some technical solutions of this application, by extending the detection time to a second preset time period, if the frequency of the difference between the outlet temperature and the inlet temperature being greater than or equal to the first preset value exceeds a set frequency, it indicates that the refrigerator refrigeration system has experienced a first type of fault.
[0047] For example, when a user opens the refrigerator, the change in heat inside the refrigerator causes fluctuations in the heat exchange of the evaporator, resulting in fluctuations in the outlet and inlet temperatures of the evaporator. Therefore, even in the event of a minor leak in the refrigeration system, the difference between the outlet and inlet temperatures will be less than a first preset value. However, this situation is only temporary. If the frequency of the difference between the outlet and inlet temperatures being greater than or equal to the first preset value exceeds a set frequency, then the refrigerator refrigeration system is determined to have experienced a first type of fault. Within a second preset time period, the controller continuously acquires the outlet and inlet temperatures. For example, if it acquires the temperatures N times, and within those N times (M / N greater than or equal to a set frequency) the difference between the outlet and inlet temperatures is greater than or equal to the first preset value, then the refrigerator refrigeration system is determined to have experienced a first type of fault.
[0048] In some embodiments, the second preset duration can be from 1 hour and 30 minutes to 2 hours; the first preset duration can be from 30 minutes to 1 hour. For example, within the second preset duration, N equals 1000, and the set frequency is 95%-98%.
[0049] As an optional implementation of the above embodiments, the fault identification method further includes: acquiring the ambient temperature; and determining the second preset value based on the ambient temperature.
[0050] In this embodiment, the second preset value is related to the ambient temperature. After throttling, the temperature of the refrigerant should be lower than the ambient temperature minus (4-6)°C; if it is higher than the ambient temperature minus (4-6)°C, it indicates that the temperatures at the evaporator inlet and outlet are close to the ambient temperature. Therefore, the second preset value is set to be related to the ambient temperature.
[0051] In one specific embodiment, the fault identification method for the refrigerator's refrigeration system in this application includes: When T out -T in If the temperature is ≥5℃ and remains so for 60 minutes, the first type of fault will occur, indicating that the refrigerant is insufficient or of low purity. Under these circumstances, the refrigerator may output the first code, such as E1.
[0052] T 环 -5℃>T in T out >-20℃, and T out -T in If the temperature is below 3℃, a second type of fault occurs, indicating oil blockage in the evaporator lines. In this case, the refrigerator may output a second code, such as E2.
[0053] T in T out >T 环 If the temperature drops to -5℃, a third type of fault will occur, indicating that there is no refrigerant in the refrigerant system. In this case, the refrigerator may output a third code, such as E3.
[0054] In this embodiment, the first code, the second code, and the third code can be displayed on the refrigerator or transmitted to the user terminal.
[0055] Secondly, to better implement the fault identification method in the embodiments of this application, based on the fault identification method, the embodiments of this application also provide a fault identification device, such as... Figure 5 As shown, the fault identification device includes: Control module 100 is used to control the operation of the compressor; The acquisition module 200 is used to acquire the inlet temperature and outlet temperature of the evaporator; The determining module 300 is configured to determine that the refrigerator refrigeration system has encountered a first fault type when the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and continues for a preset duration; and / or determine that the refrigerator refrigeration system has encountered a second fault type when the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value; wherein the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or determine that the refrigerator refrigeration system has encountered a third fault type when the outlet temperature and the inlet temperature are greater than the second preset value.
[0056] Optionally, the fault identification device includes a judgment module, used to judge whether the outlet temperature and the inlet temperature are greater than a second preset value; if the outlet temperature and the inlet temperature are not greater than the second preset value, then judge whether the difference between the outlet temperature and the inlet temperature is less than a fourth preset value; if the difference between the outlet temperature and the inlet temperature is not less than the fourth preset value, then judge whether the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value.
[0057] Optionally, if the difference between the outlet temperature and the inlet temperature is less than the fourth preset value, the determination module is used to determine that the outlet temperature and the inlet temperature are between the second preset value and the third preset value.
[0058] Optionally, obtaining the inlet temperature and outlet temperature of the evaporator includes: After determining that the compressor has been effectively started, the acquisition module acquires the inlet temperature and outlet temperature of the evaporator.
[0059] Optionally, the fault identification device further includes: An adjustment module is used to increase the acquisition frequency of the outlet temperature and inlet temperature of the evaporator after the difference between the outlet temperature and the inlet temperature is first greater than or equal to a first preset value.
[0060] Optionally, the determining module is used to determine that the refrigerator refrigeration system has a first fault type if the frequency of occurrence of the difference between the outlet temperature and the inlet temperature being greater than or equal to the first preset value exceeds a set frequency within a second preset time period; wherein the second preset time period is longer than the first preset time period.
[0061] Optionally, the acquisition module is used to acquire the ambient temperature; the determination module is used to determine the second preset value based on the ambient temperature.
[0062] Thirdly, embodiments of this application also propose a control system for a fault identification method, comprising: one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the fault identification method as described above.
[0063] Typically, the control system of the fault identification method includes: at least one processor, at least one memory, and a control program of the control system of the fault identification method stored in the memory and executable on the processor. The control program of the control system of the fault identification method is configured to implement the steps of the control method as described above.
[0064] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor may also include a main processor and coprocessors. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. The processor may also include an AI (Artificial Intelligence) processor, which handles the control method operations of the control system related to the fault identification method, enabling the control method model of the control system to learn autonomously, improving efficiency and accuracy.
[0065] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory are used to store at least one instruction, which is executed by a processor to implement the fault identification method of the control system provided in the method embodiments of this application.
[0066] Control the compressor operation; Obtain the inlet temperature and outlet temperature of the evaporator; When the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and persists for a first preset duration, a first fault type is determined to have occurred in the refrigerator's refrigeration system; and / or When the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value, a second fault type is determined to have occurred in the refrigerator refrigeration system; wherein the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or When the outlet temperature and the inlet temperature are greater than the second preset value, the refrigerator refrigeration system is determined to have a third fault type.
[0067] Optionally, the fault identification method includes: Determine whether the outlet temperature and the inlet temperature are greater than a second preset value; If the outlet temperature and the inlet temperature are not greater than the second preset value, then determine whether the difference between the outlet temperature and the inlet temperature is less than the fourth preset value; If the difference between the outlet temperature and the inlet temperature is not less than a fourth preset value, then it is determined whether the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value.
[0068] Optionally, the fault identification method further includes: If the difference between the outlet temperature and the inlet temperature is less than the fourth preset value, then it is determined that the outlet temperature and the inlet temperature are between the second preset value and the third preset value.
[0069] Optionally, obtaining the inlet temperature and outlet temperature of the evaporator includes: After confirming that the compressor has started effectively, the inlet temperature and outlet temperature of the evaporator are obtained.
[0070] Optionally, the fault identification method further includes: After the difference between the outlet temperature and the inlet temperature first becomes greater than or equal to a first preset value, the frequency of obtaining the outlet temperature and inlet temperature of the evaporator is increased.
[0071] Optionally, the fault identification method further includes: within a second preset time period, if the frequency of occurrence of the difference between the outlet temperature and the inlet temperature being greater than or equal to a first preset value exceeds a set frequency, determining that the refrigerator refrigeration system has a first fault type; wherein, the second preset time period is longer than the first preset time period.
[0072] Optionally, the fault identification method further includes: acquiring the ambient temperature; and determining the second preset value based on the ambient temperature.
[0073] The above provides a detailed description of a refrigerator and its fault identification method, device, and computer-readable storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. A method for fault identification in a refrigerator refrigeration system, characterized in that, The refrigeration system includes a compressor and an evaporator; The fault identification method includes: Control the compressor operation; Obtain the inlet temperature and outlet temperature of the evaporator; When the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and persists for a first preset duration, a first fault type is determined to have occurred in the refrigerator's refrigeration system; and / or When the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value, a second fault type is determined to have occurred in the refrigerator refrigeration system; wherein the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or When the outlet temperature and the inlet temperature are greater than the second preset value, the refrigerator refrigeration system is determined to have a third fault type.
2. The fault identification method as described in claim 1, characterized in that, The fault identification method includes: Determine whether the outlet temperature and the inlet temperature are greater than a second preset value; If the outlet temperature and the inlet temperature are not greater than the second preset value, then determine whether the difference between the outlet temperature and the inlet temperature is less than the fourth preset value; If the difference between the outlet temperature and the inlet temperature is not less than a fourth preset value, then it is determined whether the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value.
3. The fault identification method as described in claim 2, characterized in that, The fault identification method further includes: If the difference between the outlet temperature and the inlet temperature is less than the fourth preset value, then it is determined whether the outlet temperature and the inlet temperature are between the second preset value and the third preset value.
4. The fault identification method as described in claim 1, characterized in that, The process of obtaining the inlet and outlet temperatures of the evaporator includes: After confirming that the compressor has started effectively, the inlet temperature and outlet temperature of the evaporator are obtained.
5. The fault identification method as described in claim 1, characterized in that, The fault identification method further includes: After the difference between the outlet temperature and the inlet temperature first becomes greater than or equal to a first preset value, the frequency of obtaining the outlet temperature and inlet temperature of the evaporator is increased.
6. The fault identification method as described in claim 1 or 5, characterized in that, The fault identification method further includes: within a second preset time period, if the frequency of occurrence of the difference between the outlet temperature and the inlet temperature being greater than or equal to a first preset value exceeds a set frequency, determining that the refrigerator refrigeration system has a first fault type; wherein, the second preset time period is longer than the first preset time period.
7. The fault identification method as described in claim 1, characterized in that, The fault identification method further includes: Obtain the ambient temperature; The second preset value is determined based on the ambient temperature.
8. A fault identification device for a refrigerator refrigeration system, characterized in that, The refrigeration system includes a compressor and an evaporator; The fault identification device includes: The control module is used to control the operation of the compressor; The acquisition module is used to acquire the inlet temperature and outlet temperature of the evaporator; The determination module is configured to determine a first fault type in the refrigerator refrigeration system when the difference between the outlet temperature and the inlet temperature is greater than or equal to a first preset value and persists for a preset duration; and / or determine a second fault type in the refrigerator refrigeration system when the outlet temperature and the inlet temperature are between a second preset value and a third preset value, and the difference between the outlet temperature and the inlet temperature is less than a fourth preset value; wherein the first preset value is greater than the fourth preset value; the second preset value is greater than the third preset value, and the second preset value is less than the current ambient temperature; and / or determine a third fault type in the refrigerator refrigeration system when the outlet temperature and the inlet temperature are greater than the second preset value.
9. A refrigerator, characterized in that, Includes a controller for performing the fault identification method for the refrigerator refrigeration system according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps in the fault identification method for the refrigerator refrigeration system according to any one of claims 1 to 7.