Refrigerator and its control method and control device

Abstract

This application provides a refrigerator and its control method and device. The refrigerator includes an evaporator and a heating device, wherein the heating device is used to heat the evaporator. The method includes: when the refrigerator meets preset conditions, acquiring a first temperature of the evaporator; controlling the heating device to operate at a preset power; after a first preset time, controlling the heating device to turn off; acquiring a second temperature of the evaporator; calculating the defrosting temperature difference between the first temperature and the second temperature; and determining whether to end defrosting based on the defrosting temperature difference. The method provided in this application uses the defrosting temperature difference as a direct quantitative indicator of the current defrosting effect, which can truly reflect the actual defrosting progress on the evaporator surface. Compared with the control method that uses a fixed time as the end basis, this solution can realize timely stopping of defrosting when there is no frost, which not only ensures the defrosting effect but also avoids excessive defrosting leading to energy waste.

Description

Technical Field

[0001] This application belongs to the field of refrigerator technology, and in particular relates to a refrigerator and its control method and control device. Background Technology

[0002] Most existing frost-free refrigerators use a fixed-duration strategy for active defrosting control, meaning that the defrosting heating device operates continuously at a preset power during the defrosting cycle until the preset time is reached, at which point defrosting is forcibly terminated.

[0003] This control strategy cannot stop defrosting in a timely manner based on the real-time defrosting effect, resulting in problems of insufficient or excessive defrosting. Summary of the Invention

[0004] This application provides a refrigerator and its control method and device to solve the problem of insufficient or excessive defrosting in existing refrigerators during defrosting.

[0005] This application provides a method for controlling a refrigerator, the refrigerator including an evaporator and a heating device, the heating device being used to heat the evaporator, the method including: When the refrigerator meets the preset conditions, the first temperature of the evaporator is obtained; The heating device is controlled to operate at a preset power. After the first preset time period, the heating device is turned off. Obtain the second temperature of the evaporator; Calculate the defrosting temperature difference between the first temperature and the second temperature; The defrosting process is determined based on the aforementioned temperature difference.

[0006] Optionally, the method further includes: The total number of times the first temperature is measured is accumulated; The step of determining whether to end defrosting based on the defrosting temperature difference includes: The defrosting process is determined based on the defrosting temperature difference and the number of times the data is collected.

[0007] Optionally, the preset conditions include a first condition; The step of determining whether to end defrosting based on the defrosting temperature difference and the number of acquisitions includes: If the defrosting temperature difference is greater than or equal to the preset temperature difference, or the number of times the data is acquired is greater than or equal to the preset number of times, then the defrosting process ends. If the defrosting temperature difference is less than the preset temperature difference and the number of times the data is obtained is less than the preset number of times, then the refrigerator is determined to meet the first condition.

[0008] Optionally, the method further includes: When the number of acquisitions is once, the initial temperature difference is determined as the preset temperature difference; When the number of acquisitions is greater than once, the temperature difference decrease step size is determined based on the number of acquisitions, and the temperature difference decrease step size is reduced based on the initial temperature difference to obtain the current preset temperature difference.

[0009] Optionally, the method further includes: The total number of times the first temperature is measured is accumulated; The preset power is determined based on the number of acquisitions.

[0010] Optionally, determining the preset power based on the number of acquisitions includes: When the number of acquisitions is one, the initial power is determined to be the preset power; When the number of acquisitions is greater than once, the power attenuation step size is determined based on the number of acquisitions, and the power attenuation step size is reduced based on the initial power to obtain the current preset power.

[0011] Optionally, the preset condition includes a second condition; the method further includes: When a defrosting command is received, it is determined that the refrigerator meets the second condition.

[0012] Optionally, before obtaining the second temperature of the evaporator, the method further includes: Wait for the second preset time.

[0013] This application embodiment also provides a control device for a refrigerator, the refrigerator including an evaporator and a heating device, the heating device being used to heat the evaporator, the device comprising: The temperature acquisition module is configured to acquire the first temperature of the evaporator when the refrigerator meets preset conditions; The control module is configured to control the heating device to operate at a preset power; and after a first preset time, control the heating device to turn off. The temperature acquisition module is also configured to acquire a second temperature of the evaporator; The analysis module is configured to calculate the defrosting temperature difference between the first temperature and the second temperature; and to determine whether to end defrosting based on the defrosting temperature difference.

[0014] This application also provides a refrigerator, which includes an evaporator and a heating device for heating the evaporator. The refrigerator also includes a controller configured to perform the refrigerator control method described above.

[0015] The refrigerator control method provided in this application has a negative correlation between the amount of frost on the evaporator surface and the defrosting temperature difference before and after defrosting heating. That is, the thicker the frost layer, the greater the latent heat of phase change consumption and the slower the temperature rise of the evaporator surface, so the smaller the defrosting temperature difference. Conversely, the thinner the frost layer, the greater the proportion of residual heat used for evaporator surface heating, so the larger the defrosting temperature difference. Therefore, this solution uses the defrosting temperature difference as a direct quantitative indicator of the current defrosting effect, which can truly reflect the actual defrosting progress of the evaporator surface. Compared with the control method that uses a fixed time as the end basis, this solution can realize timely stopping of defrosting when there is no frost, which can both ensure the defrosting effect and avoid excessive defrosting leading to energy waste. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0018] Figure 1 This is a first flowchart of a refrigerator control method provided in an embodiment of this application.

[0019] Figure 2 This is a second flowchart of a refrigerator control method provided in an embodiment of this application.

[0020] Figure 3 This is a third flowchart of a refrigerator control method provided in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of the control device for a refrigerator provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0023] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] In the description of the embodiments of this application, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, and memory, and may also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc.

[0025] This application provides a refrigerator and its control method and device to solve the problem of insufficient or excessive defrosting in existing refrigerators during defrosting. The following description is in conjunction with the accompanying drawings.

[0026] The refrigerator control method provided in this application includes an evaporator and a heating device. The heating device is used to heat the evaporator. The refrigerator can be a frost-free refrigerator. The evaporator is a component in the refrigerator's refrigeration system that absorbs heat. Refrigerant evaporates and absorbs heat within it, lowering the surface temperature of the evaporator, causing water vapor in the air to condense into frost on its surface. The heating device is located near the evaporator and is used to heat the evaporator to melt the frost layer on its surface; it is typically an electric heating element or a PTC heater. Please refer to [link to relevant documentation]. Figure 1 The method includes the following steps: S101: When the refrigerator meets the preset conditions, obtain the first temperature of the evaporator.

[0027] The preset conditions can be either the conditions that trigger the defrosting process or the conditions that the refrigerator meets to continue defrosting. The triggering conditions can be preset by the refrigerator control system, such as the compressor running for a preset time, or they can be externally issued defrosting commands, such as those issued by the user through the display screen.

[0028] The first temperature is the temperature of the evaporator before the heating device is started.

[0029] S102: Control the heating device to operate at the preset power.

[0030] The preset power is the electrical power setting value when the heating device is running, which can be a fixed value or a dynamically adjusted value.

[0031] S103: After the first preset time, control the heating device to turn off.

[0032] The first preset duration is the length of time the heating device continuously heats the device in a single cycle.

[0033] S104: Obtain the second temperature of the evaporator.

[0034] The second temperature is the temperature of the evaporator after the heating device stops.

[0035] Furthermore, after the heating device is turned off, you can wait for a second preset time before obtaining the second temperature of the evaporator.

[0036] Because the temperature is significantly uneven on the evaporator at the moment the heating device is turned off, areas closer to the heater are hotter and areas farther away are colder. If a measurement is taken immediately at this point, the temperature at the sensor location may deviate from the overall average temperature of the evaporator, leading to inaccurate readings. Waiting for a second preset time allows sufficient heat to dissipate and conduct, after which the temperature across the evaporator tends to equalize. The measurement at this time more accurately represents the true temperature level of the evaporator after heating. Furthermore, the waiting time allows for continued defrosting using residual heat, improving the energy efficiency ratio.

[0037] For example, suppose that after the heating device is turned off, the temperature of the pipe near the heater instantly reaches 15°C, while the temperature of the fins at the far end is only 5°C. If the sensor near the pipe is measured immediately and it gets 15°C, the calculated temperature difference may be more than 10°C, leading to a false judgment and termination. If the measurement is taken after 30 seconds (the second preset time), the overall temperature of the evaporator will tend to be 10°C after the heat is evenly diffused. Only then will the temperature difference truly reflect the degree of frost melting.

[0038] Temperature sensors can be installed on the surface of the evaporator to obtain a first temperature and a second temperature.

[0039] S105: Calculate the defrosting temperature difference between the first temperature and the second temperature.

[0040] The defrosting temperature difference is the difference between the second temperature and the first temperature, which is the temperature rise of the evaporator within a fixed heating time.

[0041] The defrosting temperature difference is a relative measurement of the same sensor under the same environment. It can effectively eliminate the absolute temperature measurement error caused by ambient temperature fluctuations, individual sensor differences and installation position deviations, making the judgment results more reliable.

[0042] S106: Determine whether to end defrosting based on the defrosting temperature difference.

[0043] Specifically, when the defrosting temperature difference indicates that the current frost layer has been basically cleared, the defrosting process ends to avoid over-defrosting. When the defrosting temperature difference indicates that there is still residual frost, the defrosting process continues to avoid insufficient defrosting. This achieves adaptive control of the defrosting process and the amount of frost, eliminating the need to manually set the defrosting cycle.

[0044] The refrigerator control method provided in this application has a negative correlation between the amount of frost on the evaporator surface and the defrosting temperature difference before and after defrosting heating. That is, the thicker the frost layer, the greater the latent heat of phase change consumption and the slower the temperature rise of the evaporator surface, so the smaller the defrosting temperature difference. Conversely, the thinner the frost layer, the greater the proportion of residual heat used for evaporator surface heating, so the larger the defrosting temperature difference. Therefore, this solution uses the defrosting temperature difference as a direct quantitative indicator of the current defrosting effect, which can truly reflect the actual defrosting progress of the evaporator surface. Compared with the control method that uses a fixed time as the end basis, this solution can realize timely stopping of defrosting when there is no frost, which can both ensure the defrosting effect and avoid excessive defrosting leading to energy waste.

[0045] Optionally, please refer to Figure 2 The method also includes: accumulating the number of times the first temperature is acquired; determining whether to end defrosting based on the defrosting temperature difference, including: determining whether to end defrosting based on the defrosting temperature difference and the number of acquisitions.

[0046] The number of times the first temperature is acquired refers to the cumulative number of times the action of acquiring the first temperature is performed during this defrosting process. The first temperature is acquired once at the beginning of each defrosting cycle, and this number increases by one each cycle, reflecting the number of heating cycles that have been performed during defrosting.

[0047] Based on temperature difference judgment, the number of acquisitions is introduced as an auxiliary judgment factor to increase judgment redundancy and improve system reliability. When the temperature sensor drifts or malfunctions, causing the temperature difference measurement value to always be low, defrosting may never end based on the temperature difference condition. With the introduction of an upper limit on the number of acquisitions, even if the temperature difference condition is never met, defrosting can be forcibly ended after the preset number of acquisitions is reached, avoiding safety accidents and energy waste caused by the heating device running indefinitely.

[0048] Optionally, the preset conditions include a first condition; determining whether to end defrosting based on the defrosting temperature difference and the number of acquisitions includes: if the defrosting temperature difference is greater than or equal to the preset temperature difference, or the number of acquisitions is greater than or equal to the preset number of acquisitions, then defrosting ends; if the defrosting temperature difference is less than the preset temperature difference, and the number of acquisitions is less than the preset number of acquisitions, then the refrigerator is determined to meet the first condition.

[0049] The first condition is the state condition that requires continued defrosting.

[0050] The preset temperature difference is a temperature threshold used to determine whether defrosting is complete. When the defrosting temperature difference reaches or exceeds this value, the frost layer is considered to have basically melted.

[0051] The preset number of times is the maximum allowed number of times the defrost cycle can be executed. When the number of times is reached or exceeded, the defrost cycle will be forcibly terminated even if the temperature difference condition has not been met.

[0052] The defrosting process is ensured to be safe and efficient through a dual guarantee mechanism of temperature difference and number of defrost cycles. The temperature difference condition determines whether to stop based on the actual defrosting effect, while the number of cycles condition provides a safety net to prevent infinite cycles. Together, they form a dual guarantee that the defrosting process will end early when the temperature difference reaches the target and will be forcibly ended when the number of cycles is capped, ensuring both sufficient defrosting and system safety.

[0053] For example, assuming the preset temperature difference is 3℃ and the preset number of cycles is 5, if the temperature difference is measured to be 4℃ in the second cycle, even though the number of cycles is only 2, the temperature difference has reached the standard, and defrosting is immediately stopped to avoid unnecessary heating; if the temperature difference is always 1℃, the cycle will be forcibly stopped after a maximum of 5 cycles to prevent the heating device from running indefinitely.

[0054] Optionally, please refer to Figure 3 The method also includes: when the number of acquisitions is once, the initial temperature difference is determined as the preset temperature difference; when the number of acquisitions is more than once, the temperature difference decrease step size is determined based on the number of acquisitions, and the temperature difference decrease step size is reduced based on the initial temperature difference to obtain the current preset temperature difference.

[0055] The initial temperature difference is the preset temperature difference threshold used during the first defrost cycle, which is a pre-set baseline value.

[0056] The temperature difference decrease step size is the preset decrease in temperature difference after each cycle. It can be a fixed value (such as a decrease of 0.5℃ each time) or a function value related to the number of cycles.

[0057] The current preset temperature difference is the temperature difference threshold used in this cycle, calculated based on the current number of temperature acquisitions. The calculation formula is: Current preset temperature difference = Initial temperature difference (Number of times) 1) × Temperature difference decreasing step size.

[0058] In this design, the criteria for determining the temperature difference differ in each cycle to compensate for the cumulative heat effect. In multiple heating cycles, each heating not only melts the frost layer but also gradually increases the temperature of the evaporator metal body. Even if the frost layer has not completely melted, the increased body temperature will lead to a higher second temperature measured in subsequent cycles. Maintaining a fixed threshold could result in prematurely ending the defrosting process. By lowering the threshold with each cycle, the stringency of the termination condition is gradually increased, effectively mitigating the risk of misjudgment caused by the cumulative heat effect.

[0059] For example, if the initial temperature difference is 5℃ and the temperature difference decrease step size is 0.5℃, then the first preset temperature difference is 5℃, the second is 4.5℃, the third is 4.0℃, and so on. If the actual temperature difference in the third time is 4.2℃, then the current threshold (4.0℃) is reached, and thus the defrosting ends.

[0060] Optionally, the method further includes: accumulating the number of times the first temperature is acquired; and determining a preset power based on the number of acquisitions.

[0061] The preset power is the electrical power value of the heating device during this defrosting cycle. It can be dynamically adjusted based on the number of times it is measured, so that the power can be different in the later stages of defrosting than in the early stages.

[0062] In the early stages of defrosting, the frost layer is thick and has high thermal resistance, requiring high power to provide sufficient heat to melt it. However, in the later stages of defrosting, the frost layer thins, and if high power heating continues, the excess heat will be used to raise the evaporator temperature instead of melting the frost, resulting in energy waste. Therefore, reducing power according to the number of defrosting cycles can significantly reduce ineffective energy consumption in the later stages.

[0063] At the same time, it can also extend the life of the heating device, avoid the heating device from operating at rated full power for a long time, and reduce the wear and tear on the heating element caused by thermal stress and current surges.

[0064] The number of times the first temperature is obtained is equivalent to the number of times the defrosting cycle is executed. Therefore, the cumulative number of times the first temperature is obtained can also be replaced by the cumulative number of times the second temperature is obtained, the cumulative number of times the heating device is run, or the cumulative number of times the heating device is turned off, etc.

[0065] Optionally, determining the preset power based on the number of acquisitions includes: when the number of acquisitions is one, determining the initial power as the preset power; when the number of acquisitions is more than one, determining the power attenuation step size based on the number of acquisitions, reducing the power attenuation step size based on the initial power, and obtaining the current preset power.

[0066] The initial power is the power value used by the heating device during the first defrost cycle. It is a reference power setting and can be the rated power of the heating device.

[0067] The power attenuation step size is the preset power reduction value after each cycle. It can be a fixed watt value (such as a reduction of 20W each time) or a function value related to the number of cycles.

[0068] The current preset power is the heating power value used in this cycle, dynamically calculated based on the current number of acquisitions. The calculation formula can be: Current preset power = initial power (Number of times) 1) × Power attenuation step size.

[0069] By adjusting the power gradually rather than abruptly, the heat output of the heating device changes smoothly, avoiding temperature control oscillations and current surges that may be caused by sudden power changes, which is conducive to the stable operation of the refrigerator's refrigeration system.

[0070] Meanwhile, by independently setting the initial power and power decay step size, it can flexibly adapt to refrigerator models with different volumes, evaporator sizes, and heater specifications. For example, large-capacity refrigerators can be set with higher initial power and smaller decay step size to provide sufficient defrosting heat, while small-capacity refrigerators can be set accordingly.

[0071] Finally, the power reduction and temperature difference reduction form a synergistic effect of dual reduction. The power reduction reduces the temperature rise in subsequent cycles, and the temperature difference reduction lowers the termination threshold. The two change synchronously and are dynamically matched to ensure that no matter how far defrosting has progressed, the judgment logic always maintains the same physical meaning, that is, whether the temperature rise has reached the current expected level under the current power input.

[0072] Optionally, the preset conditions include a second condition; the method further includes: when a defrosting command is received, determining that the refrigerator meets the second condition.

[0073] The second condition is one of the conditions that triggers the defrosting process. This condition is met when the refrigerator controller receives the command to start defrosting.

[0074] The defrosting start command can be a defrosting start signal sent from the outside, or it can come from manual operation by the user (such as pressing the defrost button), a remote smart terminal (such as a control command sent by a mobile APP via WiFi), or a control signal generated by the refrigerator's internal timer (a timer signal triggered when the preset defrosting cycle is reached), or by the fusion judgment of other sensors (such as detecting too many door openings or too high ambient humidity).

[0075] It should be understood that the second condition is the condition that triggers the first defrost. That is, the system will start the first defrost only when the second condition is met. Whether to continue defrosting after the first defrost depends on whether the first condition is met.

[0076] This application embodiment also provides a refrigerator control device. The refrigerator includes an evaporator and a heating device, the heating device being used to heat the evaporator. Please refer to [link to relevant documentation]. Figure 4 The device includes: a temperature acquisition module 201, configured to acquire a first temperature of the evaporator when the refrigerator meets preset conditions; a control module 202, configured to control the heating device to operate at a preset power; and control the heating device to turn off after a first preset time; the temperature acquisition module 201 is also configured to acquire a second temperature of the evaporator; and an analysis module 203, configured to calculate the defrosting temperature difference between the first temperature and the second temperature; and determine whether to end defrosting based on the defrosting temperature difference.

[0077] This application embodiment also provides a refrigerator, which includes an evaporator and a heating device for heating the evaporator. The refrigerator also includes a controller configured to execute the refrigerator control method described above. The method includes the following steps: S101: When the refrigerator meets preset conditions, a first temperature of the evaporator is obtained. S102: The heating device is controlled to operate at a preset power. S103: After a first preset time, the heating device is controlled to turn off. S104: A second temperature of the evaporator is obtained. S105: The defrosting temperature difference between the first temperature and the second temperature is calculated. S106: Based on the defrosting temperature difference, it is determined whether defrosting should be ended.

[0078] This application also provides an electronic device 300, please refer to... Figure 5 The system includes a memory 301, a processor 302, and a computer program 3011 stored in the memory 301 and executable on the processor 302. When the processor executes the computer program, it implements the refrigerator control method described above. The method includes the following steps: S101: When the refrigerator meets preset conditions, a first temperature of the evaporator is obtained. S102: The heating device is controlled to operate at a preset power. S103: After a first preset time, the heating device is controlled to turn off. S104: A second temperature of the evaporator is obtained. S105: The defrosting temperature difference between the first and second temperatures is calculated. S106: Based on the defrosting temperature difference, it is determined whether defrosting should end.

[0079] This application embodiment also provides a storage medium storing control instructions. When the control instructions are executed by a processor, the refrigerator control method described above is implemented. The method includes the following steps: S101: When the refrigerator meets preset conditions, a first temperature of the evaporator is obtained. S102: The heating device is controlled to operate at a preset power. S103: After a first preset time, the heating device is controlled to turn off. S104: A second temperature of the evaporator is obtained. S105: The defrosting temperature difference between the first temperature and the second temperature is calculated. S106: Based on the defrosting temperature difference, it is determined whether defrosting should be ended.

[0080] For example, a computer program can be divided into one or more modules / units, which are stored in memory and executed by a processor to perform the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in an electronic device.

[0081] Electronic devices can be desktop computers, laptops, handheld computers, and cloud servers, among other electronic devices. Electronic devices may include, but are not limited to, processors and memory. For example, electronic devices may also include input / output devices, network access devices, buses, etc.

[0082] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0083] In the embodiments provided by this invention, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. Multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0084] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0085] If integrated modules / units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program may include computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. Computer-readable media may include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0086] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0087] In the description of this application, 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 technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0088] The refrigerator and its control method and control device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. 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 this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for controlling a refrigerator, characterized in that, The refrigerator includes an evaporator and a heating device, the heating device being used to heat the evaporator, the method comprising: When the refrigerator meets the preset conditions, the first temperature of the evaporator is obtained; The heating device is controlled to operate at a preset power. After the first preset time period, the heating device is turned off. Obtain the second temperature of the evaporator; Calculate the defrosting temperature difference between the first temperature and the second temperature; The defrosting process is determined based on the aforementioned temperature difference.

2. The refrigerator control method according to claim 1, characterized in that, The method further includes: The total number of times the first temperature is measured is accumulated; The step of determining whether to end defrosting based on the defrosting temperature difference includes: The defrosting process is determined based on the defrosting temperature difference and the number of times the data is collected.

3. The refrigerator control method according to claim 2, characterized in that, The preset conditions include a first condition; The step of determining whether to end defrosting based on the defrosting temperature difference and the number of acquisitions includes: If the defrosting temperature difference is greater than or equal to the preset temperature difference, or the number of times the data is acquired is greater than or equal to the preset number of times, then the defrosting process ends. If the defrosting temperature difference is less than the preset temperature difference and the number of times the data is obtained is less than the preset number of times, then the refrigerator is determined to meet the first condition.

4. The refrigerator control method according to claim 3, characterized in that, The method further includes: When the number of acquisitions is once, the initial temperature difference is determined as the preset temperature difference; When the number of acquisitions is greater than once, the temperature difference decrease step size is determined based on the number of acquisitions, and the temperature difference decrease step size is reduced based on the initial temperature difference to obtain the current preset temperature difference.

5. The refrigerator control method according to claim 1, characterized in that, The method further includes: The total number of times the first temperature is measured is accumulated; The preset power is determined based on the number of acquisitions.

6. The refrigerator control method according to claim 5, characterized in that, Determining the preset power based on the number of acquisitions includes: When the number of acquisitions is one, the initial power is determined to be the preset power; When the number of acquisitions is greater than once, the power attenuation step size is determined based on the number of acquisitions, and the power attenuation step size is reduced based on the initial power to obtain the current preset power.

7. The refrigerator control method according to claim 1, characterized in that, The preset condition includes a second condition; the method further includes: When a defrosting command is received, it is determined that the refrigerator meets the second condition.

8. The refrigerator control method according to claim 1, characterized in that, Before obtaining the second temperature of the evaporator, the method further includes: Wait for the second preset time.

9. A control device for a refrigerator, characterized in that, The refrigerator includes an evaporator and a heating device, the heating device being used to heat the evaporator, the device comprising: The temperature acquisition module is configured to acquire the first temperature of the evaporator when the refrigerator meets preset conditions; The control module is configured to control the heating device to operate at a preset power; and after a first preset time, control the heating device to turn off. The temperature acquisition module is also configured to acquire a second temperature of the evaporator; The analysis module is configured to calculate the defrosting temperature difference between the first temperature and the second temperature; and to determine whether to end defrosting based on the defrosting temperature difference.

10. A refrigerator, characterized in that, The refrigerator includes an evaporator and a heating device for heating the evaporator. The refrigerator also includes a controller configured to perform the refrigerator control method as described in any one of claims 1-8.

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