Refrigerator defrosting method and apparatus based on historical state data, medium, device

Abstract

Embodiments of the present application relate to a refrigerator defrosting method and device based on historical state data, a medium and equipment. The method comprises: obtaining historical state data of a forced air cooling refrigerator; determining a temperature difference between a freezing chamber temperature and a freezing evaporating chamber temperature of the forced air cooling refrigerator in a first time period according to the historical state data, to obtain a temperature difference sequence corresponding to the first time period; performing invalid data elimination on the temperature difference sequence corresponding to the first time period, to obtain an effective temperature difference sequence corresponding to the first time period; determining a temperature difference reference value according to the effective temperature difference sequence corresponding to the first time period; starting from the end time of the first time period, determining a temperature difference average value between the freezing chamber temperature and the freezing evaporating chamber temperature in each fixed period, and determining whether to control the forced air cooling refrigerator to start defrosting work according to the temperature average value and the temperature difference reference value. Embodiments of the present application will not cause the refrigerator to defrost excessively, and improve the performance of the refrigerator in many aspects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerator defrosting, in particular to a refrigerator defrosting method and device based on historical state data, a medium and equipment. BACKGROUND

[0002] The current air-cooled refrigerator as the mainstream refrigerator in the market, its frost-free principle lies in transferring the evaporator from the chamber to the outside of the chamber. After the air cools through the evaporator, the cold quantity is brought into the refrigerator chamber through the air inlet system to achieve the purpose of cooling food. Then through the air return system, the air is circulated to the evaporator for repeated circulation. At the same time, the air contains moisture, when the wet air passes through the dry and low-temperature evaporator, the water in the air is analyzed and frost is attached to the surface of the evaporator. With the continuous operation of the refrigerator, the frost layer on the surface of the evaporator gradually thickens, on the one hand, it increases the air resistance, reduces the air volume, on the other hand, it increases the heat transfer resistance between the air and the evaporator, reduces the heat transfer quantity. In order to improve the refrigeration performance of the refrigerator and reduce the energy consumption of the refrigerator, the air-cooled refrigerator usually defrosts the evaporator by using a heater.

[0003] The current air-cooled refrigerator defrosting control method generally uses the total time based on the cumulative working time of the compressor and the opening time of the refrigerator. When the total time reaches the preset value, the refrigerator starts defrosting. This method uses a fixed preset value for different user environments. In order to ensure the reliability of the refrigerator, the preset value is usually set to a value that can defrost in time in the most severe humidity environment. As a result, in most user situations, the refrigerator is defrosted too much, causing the temperature in the refrigerator chamber to fluctuate more frequently, increasing power consumption and causing more frequent noise. SUMMARY

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a refrigerator defrosting method and device based on historical state data, a medium and equipment.

[0005] According to the first aspect, the refrigerator defrosting method based on historical state data provided by the embodiments of the present application comprises:

[0006] Obtaining historical state data of an air-cooled refrigerator;

[0007] According to the historical state data, determining the temperature difference between the freezing chamber temperature and the freezing evaporator chamber temperature of the air-cooled refrigerator in a first time period to obtain a temperature difference sequence corresponding to the first time period; wherein the time length of the first time period is a fixed period;

[0008] Invalid data is removed from the temperature difference sequence corresponding to the first time period to obtain an effective temperature difference sequence corresponding to the first time period;

[0009] determine a temperature difference reference value according to the effective temperature difference sequence corresponding to the first time period;

[0010] starting from the end time of the first time period, determine a temperature difference average value between the freezing chamber temperature and the freezing evaporating chamber temperature in every fixed period, and determine whether to control the air-cooled refrigerator to start defrosting according to the temperature average value and the temperature difference reference value.

[0011] According to a second aspect, the refrigerator defrosting device based on historical state data provided by the embodiments of the present application comprises:

[0012] a data acquisition module configured to acquire historical state data of the air-cooled refrigerator;

[0013] a first determination module configured to determine a temperature difference between the freezing chamber temperature and the freezing evaporating chamber temperature of the air-cooled refrigerator in a first time period according to the historical state data, and obtain a temperature difference sequence corresponding to the first time period; wherein the time length of the first time period is a fixed period;

[0014] an invalid data elimination module configured to eliminate invalid data from the temperature difference sequence corresponding to the first time period, and obtain an effective temperature difference sequence corresponding to the first time period;

[0015] a second determination module configured to determine a temperature difference reference value according to the effective temperature difference sequence corresponding to the first time period;

[0016] a third determination module configured to, starting from the end time of the first time period, determine a temperature difference average value between the freezing chamber temperature and the freezing evaporating chamber temperature in every fixed period, and determine whether to control the air-cooled refrigerator to start defrosting according to the temperature average value and the temperature difference reference value.

[0017] According to a third aspect, the computer readable storage medium provided by the embodiments of the present application has a computer program stored thereon, when the computer program is executed in a computer, the computer is caused to execute the method provided by the first aspect.

[0018] According to a fourth aspect, the computing device provided by the embodiments of the present application comprises a memory and a processor, the memory has executable code stored therein, and the processor executes the executable code to implement the method provided by the first aspect.

[0019] The refrigerator defrosting method, apparatus, medium, and equipment based on historical state data provided in this invention analyze historical state data reported by the frost-free refrigerator to a cloud server to determine the effective temperature difference sequence within a first time period, thereby determining a temperature difference reference value. Then, at regular intervals, it is periodically determined whether the average temperature difference during this period exceeds the temperature difference reference value, and based on the determination result, it decides whether to initiate defrosting. This process judges based on the average temperature difference of the frost-free refrigerator at regular intervals, rather than requiring defrosting after a certain time. This is suitable for actual user situations and avoids excessive defrosting. It can thus improve problems such as frequent temperature fluctuations in refrigerator compartments, increased power consumption, and frequent noise in existing technologies, achieving customized, accurate, and timely defrosting for the refrigerator, improving refrigerator performance in terms of preservation, energy saving, and noise reduction. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic flowchart of a refrigerator defrosting method based on historical status data in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a preset duration in one embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention 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, 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.

[0025] In a first aspect, embodiments of the present invention provide a refrigerator defrosting method based on historical status data, see [link to previous document]. Figure 1 The method includes the following steps S110 to S150:

[0026] S110. Obtain historical status data of the air-cooled refrigerator;

[0027] In one embodiment, the historical status data may include freezer temperature, freezer evaporator temperature, defrost heater on / off indicator, compressor on / off indicator, refrigerator variable temperature compartment damper indicator, and refrigerator door open indicator.

[0028] The freezer temperature and the freezer evaporator temperature can be used to calculate the temperature difference between the two compartments. The defrost heater on / off indicator shows when the defrost heater is turned on and off, i.e., the start and end times of defrosting. The compressor on / off indicator shows when the compressor is turned on and off. The refrigerator compartment damper indicator shows when the damper is open and closed. The refrigerator door indicator shows when the refrigerator door is opened and closed.

[0029] S120. Based on the historical state data, determine the temperature difference between the freezer compartment temperature and the freezer evaporator temperature of the air-cooled refrigerator within the first time period, and obtain the temperature difference sequence corresponding to the first time period; wherein, the duration of the first time period is a fixed period.

[0030] In one embodiment, the start time of the first time period can be the first time the compressor is shut down after the previous defrosting heater has finished heating.

[0031] It can be seen that the first time period begins at the moment when the compressor is turned off for the first time after the previous defrosting heating ends, and ends after a fixed period of time.

[0032] Understandably, the time when the defrost heater ended last time can be determined based on the defrost heater switch status in the historical status data, and the compressor start-up time can be known based on the compressor start-up status.

[0033] S130: Remove invalid data from the temperature difference sequence corresponding to the first time period to obtain the effective temperature difference sequence corresponding to the first time period;

[0034] For example, for the temperature difference sequence corresponding to the first time period, the influence of the refrigerator door being open is eliminated, and the temperature difference when the refrigeration variable temperature compartment door is closed is selected to form an effective temperature difference sequence.

[0035] In one embodiment, the invalid data removal from the temperature difference sequence corresponding to the first time period may specifically include:

[0036] Based on the refrigerator door opening indicator, the temperature difference within half an hour after the frost-free refrigerator is opened is excluded;

[0037] Based on the refrigeration variable temperature chamber door marking, the temperature difference during the opening phase of the refrigeration variable temperature chamber door and the temperature difference within a preset time after the refrigeration variable temperature chamber door is closed are eliminated.

[0038] According to the defrost heater switch indicator, the temperature difference within 1 hour after the defrost heating ends is eliminated.

[0039] Specifically, eliminating the temperature difference within half an hour after the frost-free refrigerator is opened can eliminate the impact of opening and closing the refrigerator door on the temperature. Eliminating the temperature difference within one hour after the defrosting heating ends can eliminate the impact of the defrosting heater on the temperature. Eliminating the temperature difference during the opening of the variable-temperature compartment damper and the temperature difference within a preset time after the variable-temperature compartment damper is closed can eliminate the impact of opening and closing the variable-temperature compartment damper on the temperature.

[0040] Of course, it is also possible to retain the temperature difference data for the 10 minutes before the compressor is turned off, and the temperature difference data during the compressor's start-up phase. The start-up phase refers to a period of time after the compressor is turned on.

[0041] The process of determining the preset duration may include:

[0042] During compressor operation, the average temperature difference between two time points before compressor shutdown is used as a reference value; the time point when the refrigeration variable temperature compartment damper is closed is used as the first time point; the time point corresponding to the first temperature difference greater than or equal to the reference value after the refrigeration variable temperature compartment damper is closed is used as the second time point; and the time difference between the first time point and the second time point is used as the preset duration.

[0043] See Figure 2 The transition time value B is the preset duration. The start time of the transition time value B is the time when the damper of the cold storage variable temperature compartment is closed, and the end time of the transition time value B is the time point corresponding to the first temperature difference equal to the reference value 7.2 after the damper of the cold storage variable temperature compartment is closed.

[0044] During the damper's open phase, the temperature difference decreases significantly. After the damper switches from open to closed, the temperature difference increases significantly until it stabilizes.

[0045] S140. Determine the temperature difference reference value based on the effective temperature difference sequence corresponding to the first time period;

[0046] In one embodiment, determining the temperature difference reference value based on the effective temperature difference sequence corresponding to the first time period may specifically include: determining the average value and standard deviation of the effective temperature difference sequence corresponding to the first time period; and summing the average value and the standard deviation to obtain the temperature difference reference value.

[0047] S150. Starting from the end time of the first time period, every fixed period, determine the average temperature difference between the freezer temperature and the freezer evaporator temperature within that fixed period, and determine whether to control the defrosting operation of the air-cooled refrigerator based on the average temperature and the temperature difference reference value.

[0048] In one embodiment, determining whether to control the defrosting operation of the air-cooled refrigerator based on the average temperature and the temperature difference reference value may specifically include: determining whether the average temperature difference is greater than the temperature difference reference value; if so, controlling the defrosting heater of the air-cooled refrigerator to start the defrosting operation.

[0049] Of course, if the average temperature is less than the temperature difference reference value, there is no need to start the defrosting process.

[0050] Understandably, after each defrosting heating cycle, the method described in this embodiment of the invention will be re-executed to re-determine the first time period, thereby re-determining the temperature difference reference value. Based on the temperature difference reference value, a determination will be made as to whether defrosting is necessary within each fixed cycle before the next defrosting heating cycle begins. Specifically, after the frost-free refrigerator is first powered on, the first defrosting cycle can be initiated after a fixed time.

[0051] Understandably, this invention analyzes historical status data reported by the frost-free refrigerator to the cloud server to determine the effective temperature difference sequence within a first time period, thereby determining a temperature difference reference value. Then, at regular intervals, it periodically checks whether the average temperature difference during this period exceeds the temperature difference reference value, and decides whether to initiate defrosting based on the results. This process involves periodically checking the average temperature difference of the frost-free refrigerator, rather than requiring defrosting only after a certain time. This is suitable for actual user situations and avoids excessive defrosting. It improves upon existing technologies that suffer from frequent temperature fluctuations in refrigerator compartments, increased power consumption, and frequent noise, achieving customized, accurate, and timely defrosting. This improves refrigerator performance in terms of preservation, energy saving, and noise reduction.

[0052] Secondly, embodiments of the present invention provide a refrigerator defrosting device based on historical status data, comprising:

[0053] The data acquisition module is used to acquire historical status data of the air-cooled refrigerator;

[0054] The first determining module is used to determine the temperature difference between the freezer compartment temperature and the freezer evaporator temperature of the air-cooled refrigerator within a first time period based on the historical state data, and to obtain the temperature difference sequence corresponding to the first time period; wherein, the duration of the first time period is a fixed period.

[0055] The invalid data removal module is used to remove invalid data from the temperature difference sequence corresponding to the first time period to obtain the valid temperature difference sequence corresponding to the first time period.

[0056] The second determining module is used to determine the temperature difference reference value based on the effective temperature difference sequence corresponding to the first time period.

[0057] The third determining module is used to determine, starting from the end time of the first time period, the average temperature difference between the freezer temperature and the freezer evaporator temperature within a fixed period, and to determine whether to control the air-cooled refrigerator to start defrosting based on the average temperature and the temperature difference reference value.

[0058] In one embodiment, the historical status data includes freezer temperature, freezer evaporator temperature, defrost heater on / off indicator, compressor on / off indicator, refrigerator variable temperature compartment door indicator, and refrigerator door open indicator.

[0059] In one embodiment, the first time period begins at the moment when the compressor is first shut down after the previous defrosting heater finishes heating.

[0060] In one embodiment, the invalid rejection module is specifically used to: reject the temperature difference within half an hour after the refrigerator door is opened according to the refrigerator door opening indicator; reject the temperature difference during the opening phase of the refrigerator variable temperature compartment door and the temperature difference within a preset time after the refrigerator variable temperature compartment door is closed according to the refrigerator variable temperature compartment door indicator; and reject the temperature difference within 1 hour after the defrosting heater is finished according to the defrosting heater switch indicator.

[0061] In one embodiment, the invalid rejection module is further configured to determine the preset duration, wherein determining the preset duration includes: taking the average temperature difference between two time points before the compressor is turned off as a reference value during compressor operation; taking the time point when the refrigeration variable temperature compartment damper is closed as a first time point; taking the time point corresponding to the first temperature difference greater than or equal to the reference value after the refrigeration variable temperature compartment damper is closed as a second time point; and taking the time difference between the first time point and the second time point as the preset duration.

[0062] In one embodiment, the second determining module is specifically used to: determine the average value and standard deviation of the effective temperature difference sequence corresponding to the first time period; and sum the average value and the standard deviation to obtain the temperature difference reference value.

[0063] In one embodiment, the third determining module is specifically used to: determine whether the average temperature difference is greater than the temperature difference reference value; if so, control the defrosting heater of the air-cooled refrigerator to start defrosting.

[0064] It is understood that explanations, specific implementation methods, beneficial effects, examples, etc. of the contents of the apparatus provided in the embodiments of the present invention can be found in the corresponding parts of the method provided in the first aspect, and will not be repeated here.

[0065] Thirdly, embodiments of the present invention provide a computer-readable medium storing computer instructions, which, when executed by a processor, cause the processor to perform the method provided in the first aspect.

[0066] Specifically, a system or apparatus equipped with a storage medium may be provided, on which software program code implementing the functions of any of the embodiments described above is stored, and the computer (or CPU or MPU) of the system or apparatus may read and execute the program code stored in the storage medium.

[0067] In this case, the program code read from the storage medium can itself implement the function of any of the above embodiments, and therefore the program code and the storage medium storing the program code constitute part of the present invention.

[0068] Examples of storage media used to provide program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, program code can be downloaded from a server computer via a communication network.

[0069] Furthermore, it should be clear that not only can the program code read by the computer be executed, but also the operating system or other components operating on the computer can be instructed based on the program code to perform some or all of the actual operations, thereby realizing the function of any of the embodiments described above.

[0070] Furthermore, it is understood that the program code read from the storage medium is written to the memory set in the expansion board inserted into the computer or to the memory set in the expansion module connected to the computer. Then, based on the instructions of the program code, the CPU or other components installed on the expansion board or expansion module execute some and all of the actual operations, thereby realizing the function of any of the above embodiments.

[0071] It is understood that explanations, specific implementation methods, beneficial effects, examples, etc. of the contents in the computer-readable medium provided in the embodiments of the present invention can be found in the corresponding parts of the method provided in the first aspect, and will not be repeated here.

[0072] Fourthly, one embodiment of this specification provides a computing device including a memory and a processor, wherein the memory stores executable code, and when the processor executes the executable code, it implements the method of any embodiment of the specification.

[0073] It is understood that explanations, specific implementation methods, beneficial effects, examples, etc. of the computing device provided in the embodiments of the present invention can be found in the corresponding parts of the method provided in the first aspect, and will not be repeated here.

[0074] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the apparatus embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0075] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this invention can be implemented using hardware, software, widgets, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium.

[0076] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. A refrigerator defrosting method based on historical status data, characterized in that, include: Obtain historical status data reported by the air-cooled refrigerator to the cloud server; Based on the historical state data, the temperature difference between the freezer compartment temperature and the freezer evaporator temperature of the air-cooled refrigerator is determined within the first time period, and a temperature difference sequence corresponding to the first time period is obtained; wherein, the duration of the first time period is a fixed period. Invalid data is removed from the temperature difference sequence corresponding to the first time period to obtain the valid temperature difference sequence corresponding to the first time period. Based on the effective temperature difference sequence corresponding to the first time period, determine the temperature difference reference value; Starting from the end of the first time period, every fixed period, the average temperature difference between the freezer temperature and the freezer evaporator temperature is determined, and whether to control the defrosting operation of the air-cooled refrigerator is determined based on the average temperature difference and the temperature difference reference value. The historical status data includes freezer temperature, freezer evaporator temperature, defrost heater on / off indicator, compressor on / off indicator, refrigerator variable temperature compartment door indicator, and refrigerator door open indicator. The step of removing invalid data from the temperature difference sequence corresponding to the first time period includes: Based on the refrigerator door opening indicator, the temperature difference within half an hour after the frost-free refrigerator is opened is excluded; Based on the refrigeration variable temperature chamber door marking, the temperature difference during the opening phase of the refrigeration variable temperature chamber door and the temperature difference within a preset time after the refrigeration variable temperature chamber door is closed are eliminated. Based on the defrost heater switch indicator, eliminate the temperature difference within 1 hour after the defrost heating ends; The process of determining the preset duration includes: during compressor operation, taking the average temperature difference between two time points before the compressor is turned off as a reference value; taking the time point when the refrigeration variable temperature compartment damper is closed as the first time point; taking the time point corresponding to the first temperature difference greater than or equal to the reference value after the refrigeration variable temperature compartment damper is closed as the second time point; and taking the time difference between the first time point and the second time point as the preset duration.

2. The method according to claim 1, characterized in that, The first time period begins at the moment when the compressor is first shut down after the previous defrosting heater finishes heating.

3. The method according to claim 1, characterized in that, The step of determining the temperature difference reference value based on the effective temperature difference sequence corresponding to the first time period includes: Determine the mean and standard deviation of the effective temperature difference sequence corresponding to the first time period; The average value and the standard deviation are summed to obtain the temperature difference reference value.

4. The method according to claim 1, characterized in that, The step of determining whether to control the defrosting operation of the air-cooled refrigerator based on the average temperature difference and the temperature difference reference value includes: determining whether the average temperature difference is greater than the temperature difference reference value; if so, controlling the defrosting heater of the air-cooled refrigerator to start the defrosting operation.

5. A refrigerator defrosting device based on historical status data, characterized in that, include: The data acquisition module is used to acquire historical status data reported by the air-cooled refrigerator to the cloud server; The first determining module is used to determine the temperature difference between the freezer compartment temperature and the freezer evaporator temperature of the air-cooled refrigerator within a first time period based on the historical state data, and to obtain the temperature difference sequence corresponding to the first time period; wherein, the duration of the first time period is a fixed period. The invalid data removal module is used to remove invalid data from the temperature difference sequence corresponding to the first time period to obtain the valid temperature difference sequence corresponding to the first time period. The second determining module is used to determine the temperature difference reference value based on the effective temperature difference sequence corresponding to the first time period. The third determining module is used to determine the average temperature difference between the freezer temperature and the freezer evaporator temperature within a fixed period, starting from the end time of the first time period, and to determine whether to control the air-cooled refrigerator to start defrosting based on the average temperature difference and the temperature difference reference value. The historical status data includes freezer temperature, freezer evaporator temperature, defrost heater on / off indicator, compressor on / off indicator, refrigerator variable temperature compartment door indicator, and refrigerator door open indicator. The invalid rejection module is specifically used to: reject the temperature difference within half an hour after the refrigerator door is opened, based on the refrigerator door opening indicator; reject the temperature difference during the opening phase of the refrigerator variable temperature compartment door and the temperature difference within a preset time after the refrigerator variable temperature compartment door is closed, based on the refrigerator door opening indicator; and reject the temperature difference within 1 hour after the defrost heater is finished, based on the defrost heater switch indicator. The invalid rejection module is further configured to determine the preset duration, which includes: during compressor operation, taking the average temperature difference between two time points before the compressor is shut down as a reference value; taking the time point when the refrigeration variable temperature compartment damper is closed as a first time point; taking the time point corresponding to the first temperature difference greater than or equal to the reference value after the refrigeration variable temperature compartment damper is closed as a second time point; and taking the time difference between the first time point and the second time point as the preset duration.

6. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed in a computer, causes the computer to perform the method described in any one of claims 1 to 4.

7. A computing device, characterized in that, The method includes a memory and a processor, wherein the memory stores executable code, and the processor executes the executable code to implement the method described in any one of claims 1 to 4.

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