Refrigerator valve fault detection method and system

Abstract

The invention provides a refrigerator valve fault detection method and system, and the method comprises the steps: obtaining operation data which is data stored according to a time sequence, determining a frosting period according to the operation data, extracting the data of the frosting period from the operation data, and detecting the data of a detection unit; the detection unit is a detection unit in a frosting period; calculating a data occupancy rate when the refrigerating chamber temperature data of the detection unit is greater than the preset refrigerating temperature and a data occupancy rate when the freezing chamber temperature data of the detection unit is less than the preset freezing temperature, so as to confirm a first fault direction through the data occupancy rate of the preset refrigerating temperature, and confirm a second fault direction through the data occupancy rate of the preset freezing temperature, the first fault direction is from the electric valve to the refrigeration direction, and the second fault direction is from the electric valve to the freezing direction. According to the method, whether the refrigerator valve breaks down or not is judged by obtaining the operation information of the refrigerator, the fault can be found in time, the maintenance period of the refrigerator is shortened, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fault detection, and in particular to a refrigerator valve fault detection method and system. Background Art

[0002] Refrigerators are installed in users' homes over a wide range, and the locations of the devices are different. Without an Internet connection, refrigerator manufacturers cannot remotely access these devices. Moreover, if the refrigerator is not equipped with Wi-Fi or other forms of network connection modules, even if sensor data can be collected, it cannot send the data out.

[0003] In other words, it is difficult for refrigerator manufacturers to directly obtain the actual operating data of the product, such as temperature control stability, energy consumption, etc., which makes it difficult for manufacturers to promptly discover potential design defects or quality problems; and when users encounter problems, they will first contact customer service or provide feedback through other channels. This process may involve multiple communications and is inefficient. In addition, the user's description may not be accurate enough, affecting the location of the problem.

[0004] To sum up, the maintenance cycle of the refrigerator is long and the maintenance efficiency is low. Summary of the invention

[0005] The present application provides a refrigerator valve fault detection method and system to solve the problem of long maintenance cycle and low maintenance efficiency of refrigerators.

[0006] In a first aspect, the present application provides a refrigerator valve fault detection method, which is applied to a cloud server, comprising:

[0007] Acquire operation data, where the operation data is data stored in chronological order;

[0008] Determining a frosting cycle according to the operating data;

[0009] Extracting frosting cycle data from the operation data, and detecting the data of the detection unit, wherein the detection unit is a detection unit in the frosting cycle;

[0010] Calculate the data occupancy rate of the refrigerating chamber temperature data of the detection unit that is greater than the refrigerating preset temperature, and the data occupancy rate of the freezing chamber temperature data that is less than the freezing preset temperature, so as to confirm the first fault direction through the data occupancy rate of the refrigerating preset temperature, and to confirm the second fault direction through the data occupancy rate of the freezing preset temperature, the first fault direction is from the electric valve to the refrigerating direction, and the second fault direction is from the electric valve to the freezing direction.

[0011] In some feasible embodiments, determining the frosting cycle according to the operating data includes:

[0012] Acquire preset types of data from the operation data, the preset types including compartment temperature, refrigerator function setting status, electrical component operation status, and time point of electrical component status conversion;

[0013] Determining a defrost start time from the compartment temperature, and reading mode information from the refrigerator function setting state;

[0014] If the mode information is a defrost mode, obtaining the operating states of the defrost heater and the compressor from the operating states of the electrical components;

[0015] If the defrost heater stops operating and the compressor restarts, determining a defrost end time;

[0016] The frosting cycle is determined by the defrosting start time and the defrosting end time.

[0017] In some feasible embodiments, the method further includes:

[0018] Obtaining the time when the defrost heater stops running to determine the starting point of the detection unit, wherein the starting point is a first amount of time after the time when the defrost heater stops running;

[0019] The time when the defrost heater starts to operate after the starting point is extracted to determine the end point of the detection unit;

[0020] A detection unit is determined according to the starting point and the ending point.

[0021] In some feasible embodiments, the refrigerating chamber temperature data includes refrigerating chamber temperature data, refrigerating evaporator temperature and freezing evaporator temperature, and the refrigerating preset temperature includes refrigerating preset temperature, first refrigerating evaporator preset temperature and freezing evaporator preset temperature;

[0022] The calculating the data occupancy rate of the refrigerating chamber temperature data of the detection unit being greater than the refrigerating preset temperature comprises:

[0023] Calculate the first data occupancy rate, the second data occupancy rate and the third data occupancy rate, the first data occupancy rate is the data occupancy rate of the refrigeration chamber temperature data being greater than the refrigeration preset temperature, the second data occupancy rate is the data occupancy rate of the refrigeration evaporator temperature being greater than the first refrigeration evaporator preset temperature, and the third data occupancy rate is the data occupancy rate of the freezing evaporator temperature being greater than the freezing evaporator preset temperature.

[0024] In some feasible embodiments, the confirming the first fault direction by the data occupancy rate of the refrigeration preset temperature and the confirming the second fault direction by the data occupancy rate of the freezing preset temperature include:

[0025] If the data occupancy rate of the refrigeration preset temperature is greater than the refrigeration occupancy rate threshold, the electric valve to the refrigeration direction fails;

[0026] If the data occupancy rate of the freezing preset temperature is greater than the freezing occupancy rate threshold, the electric valve to the freezing direction fails.

[0027] In some feasible embodiments, if the data occupancy rate of the refrigeration preset temperature is greater than the refrigeration occupancy rate threshold, the electric valve to the refrigeration direction fault includes:

[0028] Acquiring the operating state data of the refrigerating chamber in the detection unit according to the operating state data of the electrical device;

[0029] If the refrigerating chamber operation status data is in the enabled state, and the first data occupancy rate is greater than the first occupancy rate threshold, the second data occupancy rate is greater than the second occupancy rate threshold, and the third data occupancy rate is greater than the second occupancy rate threshold, the electric valve to the refrigerating direction fails.

[0030] In some feasible embodiments, the freezing chamber temperature data is a refrigeration evaporator temperature, and the freezing preset temperature is a second refrigeration evaporator preset temperature;

[0031] The confirming the second fault direction by the data occupancy rate of the freezing preset temperature includes:

[0032] Calculating a fourth data occupancy rate, wherein the fourth data occupancy rate is a data occupancy rate at which the temperature of the refrigerating evaporator is lower than a preset temperature of the second refrigerating evaporator;

[0033] If the fourth data occupancy rate is greater than the second occupancy rate threshold, the electric valve is in the freezing direction and fails.

[0034] In some feasible embodiments, the refrigeration preset temperature is 6°C, the first refrigeration evaporator preset temperature is -2°C, the freezing evaporator preset temperature is -20°C, and the second refrigeration evaporator preset temperature is -5°C;

[0035] The first occupancy rate threshold is 90%, and the second occupancy rate threshold is 80%.

[0036] In a second aspect, the present application provides a refrigerator valve fault detection system, comprising:

[0037] The acquisition and transmission unit is used to acquire operation data, wherein the operation data is data stored in chronological order;

[0038] A detection unit is used to determine a frosting cycle based on the operating data; and to extract data of the frosting cycle from the operating data and detect the data of the detection unit, wherein the detection unit is a detection unit in the frosting cycle; and to calculate the data occupancy rate of the refrigerating chamber temperature data of the detection unit that is greater than the refrigerating preset temperature, and the data occupancy rate of the freezing chamber temperature data that is less than the freezing preset temperature, so as to confirm a first fault direction through the data occupancy rate of the refrigerating preset temperature, and to confirm a second fault direction through the data occupancy rate of the freezing preset temperature, the first fault direction is from the electric valve to the refrigerating direction, and the second fault direction is from the electric valve to the freezing direction.

[0039] In a third aspect, the present application provides a server, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the refrigerator valve fault detection method.

[0040] As can be seen from the above technical solutions, the present application provides a refrigerator valve fault detection method and system, the method acquires operation data, wherein the operation data is data stored in chronological order, and then determines the frosting cycle according to the operation data, extracts the frosting cycle data from the operation data, and detects the data of the detection unit, the detection unit being the detection unit in the frosting cycle; calculates the data occupancy rate of the refrigeration chamber temperature data of the detection unit being greater than the refrigeration preset temperature, and the data occupancy rate of the freezer chamber temperature data being less than the freezing preset temperature, so as to confirm the first fault direction through the data occupancy rate of the refrigeration preset temperature, and confirm the second fault direction through the data occupancy rate of the freezing preset temperature, the first fault direction is from the electric valve to the refrigeration direction, and the second fault direction is from the electric valve to the freezing direction. By acquiring the operation information of the refrigerator and then judging whether the refrigerator valve has a fault, the fault can be discovered in time, and the maintenance cycle of the refrigerator can be shortened, thereby improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 A schematic diagram of a refrigerator valve fault detection method flow chart provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of a first direction fault detection process provided in an embodiment of the present application;

[0044] Figure 3A schematic diagram of a second direction fault detection process provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a refrigerator valve fault detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0047] Refrigerator valve failure refers to an abnormality in the valve inside the refrigerator that controls the flow of refrigerant, causing the refrigeration system to not work properly. These failures may affect the refrigeration effect of the refrigerator or even cause the refrigerator to fail completely. To detect refrigerator valve failure, there are many ways, such as non-intelligent refrigerator failure detection and intelligent refrigerator failure detection.

[0048] Fault detection of non-intelligent refrigerators can be done through self-checking by users or after-sales service. However, after the refrigerator is sold to the user, the manufacturer cannot obtain the actual operating status information of the refrigerator. The problems of the refrigerator can only be understood through after-sales maintenance information. However, due to the long feedback period of such problems, the manufacturer cannot obtain the operating status information at the first time when the problem occurs. On the other hand, when the user reports the refrigerator for repair, since the maintenance personnel cannot determine the specific fault, it takes multiple visits to complete the maintenance task. For example, the first visit is to check the specific cause of the problem and determine the parts that need to be replaced, and the second visit is to collect the parts for replacement. This maintenance method leads to a long maintenance cycle and increases the cost and manpower of maintenance.

[0049] Intelligent refrigerator fault detection can be done through the built-in sensors of the refrigerator. The refrigerator is equipped with a variety of sensors that can monitor temperature, pressure, current and other parameters in real time. Users can upload fault information to the manufacturer's customer service center, and technicians can remotely guide users to conduct preliminary inspections or make appointments for door-to-door service based on the data.

[0050] However, the above methods all result in a long maintenance period for the refrigerator and low maintenance efficiency.

[0051] In order to solve the problem of long maintenance cycle and low maintenance efficiency of refrigerators, some embodiments of the present application provide a refrigerator valve fault detection method, which is applied to a cloud server. The cloud server communicates with a collection system, and the collection system is connected to the controller of the refrigerator to collect operating status data in the refrigerator. The cloud server receives the operating status data through a wireless network, and stores and analyzes the data.

[0052] like Figure 1 As shown, the method includes:

[0053] S100: Acquire operation data.

[0054] The operating data is the operating status data of the refrigerator, for example, temperature data, including refrigerator compartment temperature, freezer compartment temperature, evaporator temperature, condenser temperature, etc.; pressure data, including high-pressure side pressure, low-pressure side pressure, system pressure change, etc.; current data, including compressor current, fan current, total current, etc.; function setting status, including set temperature, operating mode, defrost mode, etc.; electrical component operating status, including compressor status, fan status, defrost heater status, electric valve status, etc.; time point of electrical component status conversion, including compressor start time, compressor stop time, fan start time, fan stop time, defrost heater start time, defrost heater stop time, electric valve switching time; fault codes and warning information, including fault codes, warning information, etc.; environmental data, including ambient temperature and humidity, etc.; user behavior data, including number of door openings, usage time, etc.

[0055] The operation data can be sent in a structured format, such as JSON, XML, etc., including operation parameters and timestamps. After receiving and parsing the operation data, the cloud stores it in chronological order and sets time stamps for different operation data. The resolution of the time stamp can be set as needed, such as seconds, minutes or hours.

[0056] Each piece of running data contains a timestamp, which indicates the time when the data was generated. The parsed data is sorted according to the timestamp to ensure that the data is stored in chronological order. The data can be stored in a relational database such as MySQL, PostgreSQL, or a NoSQL database such as MongoDB, Cassandra.

[0057] Exemplarily, the operation data may include timestamp, 2023-10-01T10:00:00Z; refrigerator ID, FRIDGE123; refrigerator compartment temperature, 4.0°C; freezer compartment temperature, -18.0°C; compressor status, on; fan status, on; defrost heater status, off; compressor current, 1.2A; fan current, 0.5A; high-pressure side pressure, 2.0MPa; low-pressure side pressure, 0.2MPa; operation mode, normal mode. After the cloud server receives the data, the parsing module parses it into a structured data object. The parsed data object contains a timestamp and other operation parameters to ensure that each piece of data has a clear time stamp.

[0058] The parsed data is sorted by timestamp, and the data is stored in chronological order in the database to ensure that each record has a unique timestamp. When storing data, a time stamp is set for each record to ensure the time sequence and time resolution of the data. The time stamp makes it easy to find data within a specific time period for analysis, fault detection and other operations.

[0059] It is understandable that before storing the data, the data may be preprocessed, for example, data cleaning, feature selection, data standardization, etc.

[0060] S200: Determine a frosting cycle according to the operating data.

[0061] The frost cycle is the time period from the end of one defrost to the start of the next defrost during the operation of the refrigerator. The defrost process of the refrigerator is controlled by a timer or a temperature sensor. When the predetermined time interval is reached or the surface temperature of the evaporator reaches a certain threshold, the defrost process will automatically start. During the defrost process, the refrigerator will stop refrigeration and start the defrost heater to melt the frost on the evaporator. The duration of the defrost process cannot be determined. The specific time depends on the design of the refrigerator and the thickness of the frost layer.

[0062] In some embodiments, data of a preset type is obtained from the operating data, and the defrost start time is determined from the compartment temperature, and the mode information is read from the refrigerator function setting status. If the mode information is the defrost mode, the operating status of the defrost heater and the compressor is obtained from the operating status of the electrical device. If the defrost heater stops running and the compressor restarts, the defrost end time is determined, and the frosting cycle is determined by the defrost start time and the defrost end time.

[0063] Among them, the preset categories include compartment temperature, refrigerator function setting status, electrical component operation status and time point of electrical component state conversion. That is to say, in this embodiment, not all operating data are used, and only several types of data such as compartment temperature, refrigerator function setting status, electrical component operation status and time point of electrical component state conversion are extracted.

[0064] For compartment temperature, the temperature sensor inside the refrigerator records the temperature of the refrigerator and freezer. During the defrosting process, the temperature of the freezer will rise significantly because the defrost heater starts to melt the frost on the evaporator. By monitoring the change in the freezer temperature, the start and end of the defrosting process can be identified.

[0065] For the refrigerator function setting status, the control panel or internal controller of the refrigerator will record the current function setting status, such as whether it is in defrost mode. The refrigerator function setting status can directly read whether the refrigerator enters defrost mode.

[0066] The operating status of electrical components is to record the operating status of electrical components such as compressors, fans, and defrost heaters. During the defrosting process, the compressor will temporarily stop running, and the defrost heater will start. By monitoring the changes in the operating status of these electrical components, the start and end of the defrosting process can be determined. For the time point of the electrical component state transition, by recording the time point of each electrical component state change, the start and end time of the defrosting process can be determined, thereby calculating the frosting cycle.

[0067] Obtain the temperature data of the freezer and refrigerator, function setting status data, operating status of the compressor, fan, defrost heater, etc., and the time point when the status of each electrical component changes, monitor the temperature of the freezer, and when the temperature rises significantly, determine that the defrost heater is started and the defrost process begins. Directly read whether the refrigerator enters the defrost mode. When the compressor stops running and the defrost heater starts, it can also be determined that the defrost process starts. When the defrost heater stops running and the compressor restarts, it is determined that the defrost process ends.

[0068] For example, the temperature of the freezer compartment is -18°C at 2023-10-01 10:00:00, -17°C at 2023-10-01 10:10:00, 0°C (defrost heater started) at 2023-10-01 10:20:00, 5°C at 2023-10-01 10:30:00, -18°C (defrost heater stopped) at 2023-10-01 10:40:00. The information recorded in the function setting state is: 2023-10-01 10:20:00, enter defrost mode, 2023-10-01 10:40:00, exit defrost mode. The status of electrical components is 2023-10-01 10:20:00, the compressor stops, the defrost heater starts, 2023-10-01 10:40:00, the compressor starts, and the defrost heater stops.

[0069] That is, the defrost start time is 2023-10-01 10:20:00, and the defrost end time is 2023-10-01 10:40:00, so the frosting cycle is the time period from 2023-10-01 10:20:00 to 2023-10-01 10:40:00, that is, 20 minutes.

[0070] S300: extracting frosting cycle data from the operating data, and detecting the data of the detection unit.

[0071] The detection unit is a detection unit in the frosting cycle. To determine the detection unit, in some embodiments, the time when the defrost heater stops running is obtained to determine the starting point of the detection unit. After extracting the starting point, the time when the defrost heater starts running is obtained to determine the ending point of the detection unit. The detection unit is determined based on the starting point and the ending point.

[0072] The starting point is the first number of times after the defrost heater stops running. In this embodiment, the first number is 1, that is, the starting point is 1 hour after the defrost heater stops running. For example, if the defrost heater stops running at 2023-10-01 10:40:00, the starting point is 2023-10-01 11:40:00.

[0073] If the defrost process in which the defrost heater stops running is defined as the first defrost process, then the termination point of the detection unit is the time point when the next defrost process of the first defrost process starts. For example, the temperature of the freezer compartment is 0°C (defrost heater is started) at 2023-10-05 11:20:00, or the information recorded in the function setting status is: 2023-10-05 11:20:00, entering defrost mode, or 2023-10-05 11:20:00, the compressor stops, then 2023-10-05 11:20:00 is the termination point of the detection unit.

[0074] For the detected data, in this embodiment, only the compartment temperature, refrigerator function setting status, electrical component operation status, and the time point of electrical component state conversion are detected. However, these types of data can also be obtained through user upload or user modification. In some embodiments, the collected user feedback data is cleaned to remove invalid, repeated or erroneous information to ensure the accuracy and consistency of the data and provide a reliable basis for subsequent analysis. The user feedback data is integrated with the data in the operation data to form a comprehensive data set. Through data integration, the correlation between the fault and the refrigerator operation status, usage environment, etc. can be found.

[0075] S400: Calculate the data occupancy rate of the refrigerating chamber temperature data of the detection unit that is greater than the refrigerating preset temperature, and the data occupancy rate of the freezing chamber temperature data that is less than the freezing preset temperature, so as to confirm the first fault direction through the data occupancy rate of the refrigerating preset temperature, and confirm the second fault direction through the data occupancy rate of the freezing preset temperature.

[0076] The refrigeration room temperature data includes the refrigeration room temperature, the refrigeration evaporator temperature and the freezing evaporator temperature, the refrigeration room temperature data, the refrigeration evaporator temperature and the freezing evaporator temperature are obtained from the compartment temperature, the refrigeration preset temperature includes the refrigeration preset temperature, the first refrigeration evaporator preset temperature and the freezing evaporator preset temperature. The freezing room temperature data is the refrigeration evaporator temperature, and the freezing preset temperature is the second refrigeration evaporator preset temperature.

[0077] The first fault direction is the electric valve to the refrigeration direction, and the second fault direction is the electric valve to the freezing direction. For the electric valve to the refrigeration direction fault, that is, the electric valve cannot be switched to the refrigeration direction, and the electric valve to the freezing direction fault, that is, the electric valve cannot be switched to the freezing direction, for both faults, the ratio of the number of all data that meet the conditions in the detection unit to the amount of all such data in the detection unit is first calculated.

[0078] In some embodiments, the first data occupancy rate, the second data occupancy rate and the third data occupancy rate are calculated respectively, wherein the first data occupancy rate is the data occupancy rate when the refrigeration chamber temperature data is greater than the refrigeration preset temperature, the second data occupancy rate is the data occupancy rate when the refrigeration evaporator temperature is greater than the first refrigeration evaporator preset temperature, and the third data occupancy rate is the data occupancy rate when the freezing evaporator temperature is greater than the freezing evaporator preset temperature.

[0079] Among them, the first data occupancy rate, the second data occupancy rate and the third data occupancy rate are used to determine the first fault direction. If the data occupancy rate of the refrigeration preset temperature is greater than the refrigeration occupancy rate threshold, the electric valve to the refrigeration direction fault, specifically, Figure 2 As shown, in some embodiments, based on the data of the operating status of the electrical device, the operating status data of the cold storage room in the detection unit is obtained. If the operating status data of the cold storage room is in an enabled state, and the first data occupancy rate is greater than the first occupancy rate threshold, the second data occupancy rate is greater than the second occupancy rate threshold, and the third data occupancy rate is greater than the second occupancy rate threshold, the electric valve to the refrigeration direction fails.

[0080] In some embodiments, the refrigeration preset temperature is 6°C, and the refrigerator compartment temperature is higher than 6°C, indicating that the refrigeration effect of the refrigerator compartment has been significantly reduced, which may be because the electric valve cannot switch the refrigerant to the refrigerator compartment. The first refrigeration evaporator preset temperature is -2°C, and the refrigeration evaporator temperature is higher than -2°C, indicating that the refrigeration evaporator has failed to effectively cool, further confirming that the electric valve may not be able to switch the refrigerant to the refrigerator compartment. The freezing evaporator preset temperature is -20°C, and the freezing evaporator temperature is lower than -20°C, indicating that the freezer compartment is still cooling normally, further confirming that the problem lies with the electric valve in the refrigerator compartment direction. The first occupancy threshold is 90%, and the second occupancy threshold is 80%.

[0081] That is to say, the operating status of the cold storage room in each frame in the detection unit is in the start-up state, that is, the cold storage room is not in the function-off state, and the data occupancy rate of the cold storage room temperature higher than 6°C in the detection unit is greater than 90%, the data occupancy rate of the refrigerated evaporator temperature greater than -2°C is greater than 80%, the water occupancy rate of the frozen evaporator temperature lower than -20°C is greater than 80%, and the electric valve to the refrigeration direction is faulty.

[0082] In some embodiments, if the data occupancy rate of the freezing preset temperature is greater than the freezing occupancy rate threshold, the electric valve is turned to the freezing direction fault. Figure 3 As shown, in some embodiments, a fourth data occupancy rate is calculated, wherein the fourth data occupancy rate is the data occupancy rate when the refrigerated evaporator temperature is less than the second refrigerated evaporator preset temperature. If the fourth data occupancy rate is greater than the second occupancy rate threshold, the electric valve to the freezing direction fails.

[0083] Among them, the preset temperature of the second refrigeration evaporator is -5℃, which indicates that the refrigeration evaporator is still cooling effectively, but the freezer may not get enough refrigerant, so the electric valve may not be able to switch the refrigerant to the freezer. In other words, if the data occupancy rate of the refrigeration evaporator temperature in the detection unit is less than -5℃, the electric valve will fail to switch to the freezer.

[0084] When the refrigerator is refrigerating, the refrigerant first flows through the freezer and then the refrigerator, but when the freezer is refrigerating, the refrigerant only flows through the freezer and not the refrigerator. Therefore, when judging the refrigeration valve failure, while meeting the refrigeration temperature and the refrigeration evaporation temperature abnormalities, it is also necessary to judge whether the freezing evaporation temperature is normal. If the freezing evaporation temperature is also abnormal, it may be a refrigeration system failure, not that the valve cannot be switched to the refrigeration direction.

[0085] During normal refrigeration, the refrigerated evaporating temperature will rise periodically and will rise to more than 2 degrees. If the refrigerated evaporating temperature remains at a low temperature for a long time, it means that there is no fault in the compressor and refrigeration pipeline, but the valve cannot be switched to the freezing direction, causing the refrigerated evaporating temperature to remain at a low temperature for a long time.

[0086] By obtaining the operating information of the refrigerator and then judging whether there is a fault in the refrigerator valve, the fault can be discovered in time, the maintenance cycle of the refrigerator can be shortened, and the maintenance efficiency can be improved.

[0087] Based on the above refrigerator valve fault detection method, some embodiments of the present application also provide a refrigerator valve fault detection system, such as Figure 4 As shown, including:

[0088] The collection and transmission unit is connected to the refrigerator control panel and is used to obtain operating data, which is data stored in chronological order; the collection and transmission unit may include a collection module and a transmission module, the collection module is used to collect the operating data in the refrigerator, and the transmission module is used to transmit the operating data collected by the collection module to the cloud server via a wireless network.

[0089] The cloud server includes a parsing module, a storage module and a detection unit. The parsing module is used to parse the operating data transmitted by the transmission module, and the storage module is used to store the parsed operating data.

[0090] The detection unit is used to determine the frosting cycle according to the operating data; and, extract the data of the frosting cycle from the operating data, and detect the data of the detection unit, the detection unit being a detection unit in the frosting cycle; and calculate the data occupancy rate of the refrigerating chamber temperature data of the detection unit being greater than the refrigerating preset temperature, and the data occupancy rate of the freezing chamber temperature data being less than the freezing preset temperature, so as to confirm the first fault direction through the data occupancy rate of the refrigerating preset temperature, and to confirm the second fault direction through the data occupancy rate of the freezing preset temperature, the first fault direction is from the electric valve to the refrigerating direction, and the second fault direction is from the electric valve to the freezing direction.

[0091] Based on the above-mentioned refrigerator valve fault detection method, some embodiments of the present application also provide a server, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the refrigerator valve fault detection method.

[0092] The server also includes a bus and a communication interface, wherein the processor, the communication interface and the memory are connected via the bus. The memory may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0093] The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software modules in the decoding processor are combined and executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the refrigerator valve fault detection method of the above embodiment in combination with its hardware.

[0094] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A refrigerator valve fault detection method, characterized in that: Applied to cloud servers, including: Acquire operation data, where the operation data is data stored in chronological order; Determining a frosting cycle according to the operating data; Extracting frosting cycle data from the operation data, and detecting the data of the detection unit, wherein the detection unit is a detection unit in the frosting cycle; Calculate the data occupancy rate of the refrigerating chamber temperature data of the detection unit that is greater than the refrigerating preset temperature, and the data occupancy rate of the freezing chamber temperature data that is less than the freezing preset temperature, so as to confirm the first fault direction through the data occupancy rate of the refrigerating preset temperature, and to confirm the second fault direction through the data occupancy rate of the freezing preset temperature, the first fault direction is from the electric valve to the refrigerating direction, and the second fault direction is from the electric valve to the freezing direction.

2. The refrigerator valve fault detection method according to claim 1, characterized in that: Determining the frosting cycle according to the operating data includes: Acquire preset types of data from the operation data, the preset types including compartment temperature, refrigerator function setting status, electrical component operation status, and time point of electrical component status conversion; Determining a defrost start time from the compartment temperature, and reading mode information from the refrigerator function setting state; If the mode information is a defrost mode, obtaining the operating states of the defrost heater and the compressor from the operating states of the electrical components; If the defrost heater stops operating and the compressor restarts, determining a defrost end time; The frosting cycle is determined by the defrosting start time and the defrosting end time.

3. The refrigerator valve fault detection method according to claim 2, characterized in that: The method further comprises: Obtaining the time when the defrost heater stops running to determine the starting point of the detection unit, wherein the starting point is a first amount of time after the time when the defrost heater stops running; The time when the defrost heater starts to operate after the starting point is extracted to determine the end point of the detection unit; A detection unit is determined according to the starting point and the ending point.

4. The refrigerator valve fault detection method according to claim 2, characterized in that: The refrigerating chamber temperature data includes data of the refrigerating chamber temperature, the refrigerating evaporator temperature and the freezing evaporator temperature, and the refrigerating preset temperature includes the refrigerating preset temperature, the first refrigerating evaporator preset temperature and the freezing evaporator preset temperature; The calculating the data occupancy rate of the refrigerating chamber temperature data of the detection unit being greater than the refrigerating preset temperature comprises: Calculate the first data occupancy rate, the second data occupancy rate and the third data occupancy rate, the first data occupancy rate is the data occupancy rate of the refrigeration chamber temperature data being greater than the refrigeration preset temperature, the second data occupancy rate is the data occupancy rate of the refrigeration evaporator temperature being greater than the first refrigeration evaporator preset temperature, and the third data occupancy rate is the data occupancy rate of the freezing evaporator temperature being greater than the freezing evaporator preset temperature.

5. The refrigerator valve fault detection method according to claim 4, characterized in that: The confirming the first fault direction by the data occupancy rate of the refrigeration preset temperature and the confirming the second fault direction by the data occupancy rate of the freezing preset temperature include: If the data occupancy rate of the refrigeration preset temperature is greater than the refrigeration occupancy rate threshold, the electric valve to the refrigeration direction fails; If the data occupancy rate of the freezing preset temperature is greater than the freezing occupancy rate threshold, the electric valve to the freezing direction fails.

6. The refrigerator valve fault detection method according to claim 5, characterized in that: If the data occupancy rate of the refrigeration preset temperature is greater than the refrigeration occupancy rate threshold, the electric valve is in the refrigeration direction fault, including: Acquiring the operating state data of the refrigerating chamber in the detection unit according to the operating state data of the electrical device; If the refrigerating chamber operation status data is in the enabled state, and the first data occupancy rate is greater than the first occupancy rate threshold, the second data occupancy rate is greater than the second occupancy rate threshold, and the third data occupancy rate is greater than the second occupancy rate threshold, the electric valve to the refrigerating direction fails.

7. The refrigerator valve fault detection method according to claim 5, characterized in that: The freezing chamber temperature data is the data of the refrigeration evaporator temperature, and the freezing preset temperature is the second refrigeration evaporator preset temperature; If the data occupancy rate of the freezing preset temperature is greater than the freezing occupancy rate threshold, the electric valve is in the freezing direction fault, including: Calculating a fourth data occupancy rate, wherein the fourth data occupancy rate is a data occupancy rate at which the temperature of the refrigerating evaporator is lower than a preset temperature of the second refrigerating evaporator; If the fourth data occupancy rate is greater than the second occupancy rate threshold, the electric valve is in the freezing direction and fails.

8. The refrigerator valve fault detection method according to claim 7, characterized in that: The preset temperature of the refrigeration is 6°C, the preset temperature of the first refrigeration evaporator is -2°C, the preset temperature of the freezing evaporator is -20°C, and the preset temperature of the second refrigeration evaporator is -5°C; The first occupancy rate threshold is 90%, and the second occupancy rate threshold is 80%.

9. A refrigerator valve fault detection system, characterized in that: include: The acquisition and transmission unit is used to acquire operation data, wherein the operation data is data stored in chronological order; A detection unit is used to determine a frosting cycle based on the operating data; and to extract data of the frosting cycle from the operating data and detect the data of the detection unit, wherein the detection unit is a detection unit in the frosting cycle; and to calculate the data occupancy rate of the refrigerating chamber temperature data of the detection unit that is greater than the refrigerating preset temperature, and the data occupancy rate of the freezing chamber temperature data that is less than the freezing preset temperature, so as to confirm a first fault direction through the data occupancy rate of the refrigerating preset temperature, and to confirm a second fault direction through the data occupancy rate of the freezing preset temperature, the first fault direction is from the electric valve to the refrigerating direction, and the second fault direction is from the electric valve to the freezing direction.

10. A server, characterized in that: The invention comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the refrigerator valve fault detection method according to any one of claims 1 to 8.

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