Refrigerator and defrost control method thereof

Abstract

The present invention provides a refrigerator and a defrost control method thereof, the defrost control method comprising: in response to the current moment reaching a preset time, obtaining the current frosting condition of the refrigerator and the estimated frosting condition of the refrigerator during the next non-low-power-consumption period; wherein the preset time is within the low-power-consumption period, and the difference between the preset time and the low-power-consumption period is a first preset period; based on the current frosting condition and the estimated frosting condition, determining whether the refrigerator meets the defrosting conditions during the next non-low-power-consumption period; if so, controlling the refrigerator to start defrosting so that the refrigerator completes defrosting before the end of the current low-power-consumption period. The present invention ensures that the refrigerator completes the defrosting operation during the low-power-consumption period. Therefore, the refrigerator of the present invention effectively alleviates the pressure on resource supply and reduces resource waste.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration equipment, and specifically provides a refrigerator and a defrosting control method thereof. Background Art

[0002] Existing refrigerators typically cool storage compartments (such as the freezer, refrigerator, and variable temperature compartment) using their evaporators. As the refrigerator is used, the low temperature of the evaporator causes moisture in the air to condense into frost. After a period of use, this frost can cover the entire evaporator, affecting its heat absorption capacity and, consequently, its cooling capacity. To address this issue, some refrigerators (particularly air-cooled models) are equipped with a heating device to heat the evaporator and melt the frost.

[0003] With the rise of energy-saving and environmentally friendly concepts like carbon peak and carbon neutrality, reducing resource waste in refrigerators has become a topic of widespread concern. Given the large inventory of refrigerators, even a small amount of resource savings per refrigerator can contribute significantly to overall savings. Since staggered electricity consumption can effectively alleviate resource pressures and reduce waste, how to enable refrigerators' more power-intensive defrost mode to operate during periods of low electricity demand has become a pressing issue. Summary of the Invention

[0004] One purpose of the present invention is to ensure that a refrigerator is defrosted during a period of low electricity consumption.

[0005] To achieve the above-mentioned object, the present invention provides a defrost control method for a refrigerator in a first aspect, comprising:

[0006] In response to the current time reaching a preset time, obtaining a current frost condition of the refrigerator and an estimated frost condition of the refrigerator during a next non-low-power-consumption period; wherein the preset time is within the low-power-consumption period, and the difference between the preset time and the low-power-consumption period is a first preset period;

[0007] determining, based on the current frost condition and the estimated frost condition, whether the refrigerator meets a defrost condition during the next non-off-peak period;

[0008] If the conditions are met, the refrigerator is controlled to start defrosting, so that the refrigerator completes defrosting before the end of the current low electricity consumption period.

[0009] Optionally, obtaining the current frost condition of the refrigerator includes:

[0010] Obtain the number of times the refrigerator door is opened and closed during this operation cycle, the time of each door opening, and the ambient humidity during each door opening;

[0011] The current frosting condition of the refrigerator is determined according to the number of door opening and closing times, the door opening time, and the ambient humidity.

[0012] Optionally, obtaining an estimated frost condition of the refrigerator during a next non-off-peak period of electricity consumption includes:

[0013] Obtaining historical frost conditions of the refrigerator during the previous non-low-power consumption period;

[0014] The historical frosting condition is determined as the estimated frosting condition.

[0015] Optionally, obtaining an estimated frost condition of the refrigerator during a next non-off-peak period of electricity consumption includes:

[0016] Obtaining historical frost conditions of the refrigerator during at least two recent non-off-peak periods;

[0017] An average value of at least two of the historical frosting conditions or the one with the largest amount of frost among the at least two historical frosting conditions is determined as the estimated frosting condition.

[0018] Optionally, before the refrigerator defrosts, the defrost control method further includes:

[0019] If the refrigerator meets the defrost condition during the next non-low-power-consumption period, determining an estimated defrost period for the refrigerator during the next non-low-power-consumption period;

[0020] Determining the interval between the estimated defrost period and the current time;

[0021] Determine defrosting parameters for the refrigerator this time according to the interval time and the historical defrosting cycle of the refrigerator, so that the refrigerator is in a low electricity consumption period when the defrosting condition is met next time.

[0022] Optionally, the interval time is recorded as t, the historical defrost cycle is recorded as T, the rated defrost parameter of the refrigerator is recorded as M0, and the current defrost parameter of the refrigerator is recorded as M;

[0023] The determining of the defrosting parameters of the refrigerator according to the interval time and the historical defrosting cycle of the refrigerator includes:

[0024] M=k×M0×[1-(t÷T)]

[0025] Among them, 1<k<1.2.

[0026] Optionally, the defrost parameters include the heating power of the heating device on the refrigerator and / or the heating time of the heating device; and / or,

[0027] The historical defrost cycle is an average value of multiple previous defrost cycles of the refrigerator.

[0028] Optionally, the defrost control method further includes:

[0029] In response to the current time being within a preset time period and the refrigerator meeting a defrosting condition, controlling the refrigerator to start defrosting;

[0030] The starting time of the preset period is the same as the starting time of the low electricity consumption period, and the ending time of the preset period is earlier than the preset time, so as to ensure that the refrigerator completes defrosting before the end of the current low electricity consumption period.

[0031] Optionally, the defrost control method further includes: in response to the refrigerator receiving an instruction to enter an energy-saving mode, controlling the refrigerator to obtain a current time.

[0032] In a second aspect, the present invention provides a refrigerator comprising:

[0033] evaporator;

[0034] a heating device for heating the evaporator;

[0035] a memory storing execution instructions;

[0036] A controller is used to execute the execution instruction so that the refrigerator executes the defrost control method according to any one of the first aspects.

[0037] Based on the foregoing description, those skilled in the art will understand that, in the aforementioned technical solution of the present invention, when the current time reaches the preset time, the current frost condition of the refrigerator and the estimated frost condition of the refrigerator during the next non-low-power consumption period are obtained, and based on the current frost condition and the estimated frost condition, it is determined whether the refrigerator meets the defrosting conditions during the next non-low-power consumption period; and if the conditions are met, the refrigerator is controlled to start defrosting so that the refrigerator completes defrosting before the end of the current low-power consumption period, thereby ensuring that the refrigerator completes the defrosting operation during the low-power consumption period. Therefore, the refrigerator of the present invention effectively alleviates the pressure on resource supply and reduces resource waste.

[0038] Furthermore, by obtaining the refrigerator's historical frost conditions during the previous non-low-power-consumption period and determining the historical frost conditions as the estimated frost conditions; or by obtaining the refrigerator's historical frost conditions during at least two recent non-low-power-consumption periods; and determining the average of the at least two historical frost conditions or the one with the largest amount of frost in the at least two historical frost conditions as the estimated frost conditions, the refrigerator of the present invention can estimate the amount of frost in the refrigerator during the next non-low-power-consumption period based on the user's usage habits, and then determine whether the refrigerator meets the defrost conditions during the next non-low-power-consumption period based on the refrigerator's previous frost conditions. Therefore, the refrigerator of the present invention can ensure that the refrigerator's defrost period is during the low-power-consumption period based on the user's usage habits.

[0039] Furthermore, if the refrigerator meets the defrost conditions during the next non-electricity low-consumption period, the estimated defrost period of the refrigerator during the next non-electricity low-consumption period is determined; then the interval time between the estimated defrost period and the current moment is determined; and then the defrost parameters of the refrigerator are determined based on the interval time and the historical defrost cycle of the refrigerator, so that the refrigerator will be in the electricity low-consumption period the next time it meets the defrost conditions. In this way, the refrigerator of the present invention not only ensures that the defrost period is in the electricity low-consumption period, but also avoids the waste of energy caused by defrosting according to the same and larger defrost parameters every time the refrigerator defrosts.

[0040] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the same reference numerals in different drawings indicate the same or similar components or parts; the drawings of the present invention are not necessarily drawn to scale. In the drawings:

[0042] Figure 1 is a flow chart of the main steps of a defrost control method for a refrigerator in some embodiments of the present invention;

[0043] Figure 2 is a flow chart of steps for obtaining current frost conditions and estimated frost conditions in some embodiments of the present invention;

[0044] Figure 3 is a flow chart of some steps of a defrost control method for a refrigerator in some further embodiments of the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of a refrigerator provided according to the purpose of the invention. DETAILED DESCRIPTION

[0046] It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present invention, rather than all embodiments of the present invention, and that these embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0047] It should be noted that in the description of the present invention, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] Furthermore, it should be noted that during operation of the refrigerator of the present invention, air can flow between the evaporator and the refrigerator compartment, causing water vapor in the air to condense into frost on the evaporator. Therefore, the refrigerators to be protected by the present invention include air-cooled refrigerators and direct-cooled refrigerators in which at least a portion of the evaporator surface is located within the compartment.

[0050] like Figure 1 As shown, in some embodiments of the present invention, the defrost control method of a refrigerator includes:

[0051] Step S110 , in response to the current time reaching the preset time, obtaining the current frost condition of the refrigerator and the estimated frost condition of the refrigerator in the next non-off-peak period.

[0052] The preset time is within a low-power consumption period, and the difference between the preset time and the low-power consumption period is a first preset period. The first preset period is no less than the shortest time period for the refrigerator to complete the defrost operation. The first preset period can be any feasible period, such as 30 minutes, 45 minutes, 60 minutes, or 90 minutes, as long as it allows the refrigerator to complete the defrost operation.

[0053] Furthermore, the low-power consumption period and the non-low-power consumption period are the low-power consumption period and the non-low-power consumption period in the area where the refrigerator is located, and they can be obtained in any feasible way. As an example one, the low-power consumption period and the non-low-power consumption period can be manually input into the refrigerator in advance by the user and stored on the refrigerator. As an example two, the low-power consumption period and the non-low-power consumption period can be obtained from the user's mobile phone by the refrigerator's Bluetooth module, WiFi module, or other functional modules that can communicate with the user's mobile phone. As an example three, the low-power consumption period and the non-low-power consumption period can be obtained from the Internet by the refrigerator's communication module (such as a WiFi module, a 4G communication module, a 5G communication module, etc.).

[0054] like Figure 2 As shown, when the current time reaches the preset time, step S110 further includes:

[0055] Step S111, obtaining the number of times the refrigerator door is opened and closed during this operation cycle, the time of each door opening, and the ambient humidity when the door is opened each time.

[0056] The number of door openings and closings refers to the number of times the refrigerator door is opened. If the refrigerator has multiple doors, it is necessary to count the number of times each door is opened, the time each door is opened, and the ambient humidity when each door is opened.

[0057] The ambient humidity is the air humidity of the environment in which the refrigerator is located. It should be understood by those skilled in the art that air humidity is related to temperature, and the water content in the air is different at different temperatures. In some embodiments of the present invention, the ambient humidity includes the air humidity corresponding to each temperature.

[0058] The operating cycle refers to the time period from the start or end of the last defrost to the start or end of the next defrost in the refrigerator. The last defrost and the next defrost are two adjacent defrosts.

[0059] Step S112: determining the current frost condition of the refrigerator according to the number of door openings and closings, the door opening time, and the ambient humidity.

[0060] Specifically, each time the refrigerator door is opened and closed, the door opening time and ambient humidity at the time of door opening are counted. Based on this door opening time and ambient humidity, the amount of frost on the refrigerator's evaporator is determined from a pre-stored table of door opening time, ambient humidity, and frost amount. The current frost level of the refrigerator (denoted as S0 for ease of illustration) is then determined by counting all door openings and closings.

[0061] Among them, the door opening time-ambient humidity-frost amount table is a data mapping table determined by repeated multiple tests for the corresponding model of refrigerator. Since obtaining the data mapping table through experiments is a conventional technical means in this field, and can be obtained by those skilled in the art with simple experience, it will not be described here in detail. Those skilled in the art will understand that since the opening and closing of the refrigerator door will drive the air flow, thereby promoting the exchange of cold air in the refrigerator compartment with the air in the environment, it is more likely to cause high-temperature and high-humidity air in the environment (relative to the air in the refrigerator compartment) to enter the refrigerator compartment, increasing the amount of frost in the refrigerator. In order to make the current frosting condition of the present invention closer to the actual frosting condition of the refrigerator, in some embodiments of the present invention, preferably, the number of door opening and closing times is recorded as n, the cumulative door opening time of all door opening and closing times is recorded as L, and the final current frosting condition is recorded as S, then

[0062]

[0063] In addition, those skilled in the art can also modify the comparison base "1 time / minute" in the formula to any other feasible value as needed, such as 0.8 times / minute, 1.2 times / minute, 1.3 times / minute, 1.5 times / minute, 2 times / minute, 3 times / minute, etc.

[0064] Step S113: Obtain the historical frost situation of the refrigerator during the previous non-low power consumption period.

[0065] In some embodiments of the present invention, the refrigerator is made to retain its frost condition during a non-low-power consumption period at least once, so that the refrigerator can obtain its historical frost condition during the previous non-low-power consumption period from its stored data.

[0066] Furthermore, in some embodiments of the present invention, the frost condition of the refrigerator in any time period (including the previous non-low-power consumption period described in step S113) can be obtained using the method described in step S112.

[0067] Step S114: determining the historical frosting conditions obtained in step S113 as the estimated frosting conditions.

[0068] It should be noted that although the present invention is combined with Figure 2 Step S111, step S112, step S113 and step S114 are introduced and explained in the order of sequence, but those skilled in the art may also execute step S113 and step S114 first, or execute step S111 and step S113 at the same time, and execute step S112 and step S114 at the same time as needed.

[0069] It is understandable to those skilled in the art that, since users use the refrigerator differently every day, in order to improve the accuracy of the refrigerator's estimated frost conditions, those skilled in the art may also replace step S113 with the following steps S115 and S116 as needed.

[0070] Step S115: Obtain historical frost conditions of the refrigerator during at least two recent non-low-power consumption periods.

[0071] The at least two non-low-power-consumption periods are at least two non-low-power-consumption periods closest to the current low-power-consumption period.

[0072] Step S116: Determine the average of the at least two historical frosting conditions or the one with the largest amount of frost among the at least two historical frosting conditions as the estimated frosting condition.

[0073] Step S120: judging whether the refrigerator meets the defrosting conditions in the next non-off-peak period of electricity consumption according to the current frosting conditions and the estimated frosting conditions.

[0074] In some embodiments of the present invention, a refrigerator defrost condition is when the amount of frost on the refrigerator reaches a preset threshold. When the amount of frost on the refrigerator reaches this threshold, the refrigerator's cooling efficiency is low, meaning that the amount of frost on the refrigerator's evaporator is large, severely hindering the evaporator's heat exchange. Based on this, those skilled in the art can determine this threshold through multiple experiments for different refrigerator models. Since the technical means for determining this threshold are conventional in the art and can be obtained by those skilled in the art through simple experience, they will not be detailed here.

[0075] Step S120 specifically includes: calculating the sum of the current frosting condition (preferably S0) and the estimated frosting condition, and determining whether the sum of the two reaches the defrosting condition.

[0076] Step S130: If the conditions are met, control the refrigerator to start defrosting so that the refrigerator completes defrosting before the end of the current low electricity consumption period.

[0077] Based on the foregoing description, those skilled in the art will appreciate that, in some embodiments of the present invention, it is possible to ensure that the refrigerator completes defrosting operations during periods of low electricity consumption, thereby effectively alleviating the pressure on resource supply and reducing resource waste.

[0078] Furthermore, in order to reduce the energy consumption during defrosting of the refrigerator and to ensure that each defrosting period of the refrigerator is during a low electricity consumption period, the present invention also provides some further embodiments.

[0079] like Figure 3 As shown, compared with some embodiments described above, in some further embodiments of the present invention, after step S120, the defrost control method for a refrigerator further includes:

[0080] Step S210: If the refrigerator meets the defrost condition in the next non-low-power-consumption period, an estimated defrost period of the refrigerator in the next non-low-power-consumption period is determined.

[0081] Specifically, if the refrigerator meets the defrost condition in the next non-low-power-consumption period, the estimated defrost period of the refrigerator in the next non-low-power-consumption period is determined according to historical frosting conditions.

[0082] The historical frost condition may be the historical frost condition of the previous non-power consumption low-peak period, or may be the average value of the historical frost conditions of at least two recent non-power consumption low-peak periods.

[0083] More specifically, based on historical frost conditions, the refrigerator's frost condition is estimated for each unit time during the next non-low-power-consumption period. The current frost condition (S or S0) is then superimposed with the frost condition for each unit time in chronological order. When the amount of frost meets the defrost conditions, the estimated defrost period for the refrigerator during the next non-low-power-consumption period is determined based on the last superimposed unit time. Optionally, the middle or end time of the last superimposed unit time is used as the estimated defrost start time for the refrigerator.

[0084] The unit time may be any feasible time, such as 30 minutes, 1 hour, 1.5 hours, 3 hours, etc. Preferably, the unit time is not greater than the defrosting time of the refrigerator.

[0085] Step S220, determining the interval between the estimated defrost period and the current time.

[0086] Specifically, a certain moment within the estimated defrost period is selected, and the interval between the certain moment and the current moment is determined. The certain moment is preferably the starting moment of the estimated defrost period, or, as needed, those skilled in the art may also set the certain moment as the ending moment or the middle moment of the estimated defrost period.

[0087] Step S230, determining the defrost parameters of the refrigerator this time according to the interval time and the historical defrost cycle of the refrigerator, so that the refrigerator is in a low power consumption period when the defrost condition is met next time.

[0088] The defrost cycle is the time interval between two consecutive defrost cycles of the refrigerator, corresponding to the operating cycle of the refrigerator. The historical defrost cycle is the average value of multiple previous defrost cycles of the refrigerator, for example, the average value of two, three, or five defrost cycles.

[0089] In some further embodiments of the present invention, the interval time is recorded as t, the historical defrost cycle is recorded as T, the rated defrost parameter of the refrigerator is recorded as M0, and the current defrost parameter of the refrigerator is recorded as M. Then:

[0090] M=k×M0×[1-(t÷T)]

[0091] Among them, 1<k<1.2, preferably, k=1.1.

[0092] Here, k is a correction parameter to prevent the defrost parameter determined by the refrigerator based on historical defrost data from being too small, which may result in incomplete defrosting of the refrigerator.

[0093] Furthermore, in some other embodiments of the present invention, the defrost parameter includes the heating power of the heating device on the refrigerator and / or the heating time of the heating device. Preferably, the defrost parameter is the heating power of the heating device on the refrigerator.

[0094] Among them, the heating device on the refrigerator is arranged on the evaporator.

[0095] Furthermore, although not shown in the drawings, the present invention also provides some other embodiments.

[0096] Compared with some embodiments described above, in some further embodiments of the present invention, the defrost control method of the refrigerator further includes a step parallel to step S110: in response to the current moment being in a preset time period and the refrigerator meeting the defrost conditions, controlling the refrigerator to start defrosting.

[0097] The starting time of the preset period is the same as the starting time of the low electricity consumption period, and the ending time of the preset period is earlier than the preset time, so as to ensure that the refrigerator completes defrosting before the end of the current low electricity consumption period.

[0098] Those skilled in the art will appreciate that, in some other embodiments of the present invention, the refrigerator can perform normal defrosting in a preset period according to a program set when the refrigerator leaves the factory.

[0099] Furthermore, although not shown in the figures, the present invention also provides other embodiments.

[0100] Compared with any of the embodiments described above, in some further embodiments of the present invention, the defrost control method for a refrigerator further includes a step before step S110: in response to the refrigerator receiving an instruction to enter energy-saving mode, controlling the refrigerator to obtain the current time.

[0101] Specifically, an operation key or touch screen is set on the refrigerator. When the refrigerator detects that the operation key or touch area representing the instruction to enter the energy-saving mode is triggered, or when the refrigerator receives the instruction to enter the energy-saving mode through the wireless module, the refrigerator obtains the current moment and executes step S110 and / or the steps described in some other embodiments.

[0102] Those skilled in the art will appreciate that some embodiments of the present invention provide refrigerators with a normal mode and an energy-saving mode, allowing the refrigerator to operate in either normal mode or energy-saving mode according to user needs. When the refrigerator operates in normal mode, its defrost control method is the same as the defrost control method of refrigerators in the prior art. When the refrigerator operates in energy-saving mode, its defrost control method is the defrost control method described in any of the above embodiments of the present invention.

[0103] like Figure 4 As shown, the present invention further provides a refrigerator 100, which includes at least one evaporator 110, at least one heating device 120, a memory 130, and a controller 140. The heating device 120 is used to heat the evaporator 110; the memory 130 stores an execution instruction; and the controller 140 is used to execute the execution instruction stored in the memory 130, so that the refrigerator 100 performs the defrost control method described in any of the above embodiments.

[0104] When the refrigerator 100 of the present invention includes at least two evaporators 110, each evaporator 110 corresponds to at least one heating device 120. The defrost control method for each evaporator 110 in the refrigerator 100 is the defrost control method described in any of the above embodiments.

[0105] The memory 130 is used to store execution instructions, which are specifically executable computer programs. Furthermore, the memory 130 may include internal memory and non-volatile memory 130 , and provide execution instructions and data to the controller 140 . For example, the internal memory may be high-speed random-access memory 130 (RAM), and the non-volatile memory 130 may be at least one disk storage 130 .

[0106] Those skilled in the art will appreciate that the above-mentioned defrost control method can be applied to the controller 140 or implemented with the aid of the controller 140. For example, the controller 140 is an integrated circuit chip capable of processing signals. During the execution of the above-mentioned defrost control method by the controller 140, each step of the above-mentioned defrost control method can be completed by an integrated logic circuit in the form of hardware or instructions in the form of software in the controller 140. Furthermore, the above-mentioned controller 140 can be a general controller, such as a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, a microcontroller, or any other conventional controller.

[0107] So far, the technical solutions of the present invention have been described in conjunction with the above multiple embodiments. However, it is easy for those skilled in the art to understand that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art may split and combine the technical solutions in the above various embodiments, and may also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

Claims

1. A defrost control method for a refrigerator, comprising: In response to the current time reaching a preset time, obtaining a current frost condition of the refrigerator and an estimated frost condition of the refrigerator during a next non-low-power-consumption period; wherein the preset time is within the low-power-consumption period, and the difference between the preset time and the low-power-consumption period is a first preset time period; and the first preset time period is not less than a minimum time period for the refrigerator to complete a defrost operation; determining, based on the current frost condition and the estimated frost condition, whether the refrigerator meets a defrost condition during the next non-off-peak period; If the conditions are met, controlling the refrigerator to start defrosting, so that the refrigerator completes defrosting before the end of the current off-peak period; Before the refrigerator defrosts, the defrost control method further includes: If the refrigerator meets the defrost condition during the next non-low-power-consumption period, determining an estimated defrost period for the refrigerator during the next non-low-power-consumption period; Determining the interval between the estimated defrost period and the current time; The interval time is recorded as t, the historical defrost cycle of the refrigerator is recorded as T, the rated defrost parameter of the refrigerator is recorded as M0, and the current defrost parameter of the refrigerator is recorded as M. The defrost parameter of the refrigerator is determined according to the following formula so that the refrigerator is in a low electricity consumption period when the defrost condition is met next time: M=k×M0×[1-(t÷T)] Among them, 1<k<1.

2.

2. The defrost control method for a refrigerator according to claim 1, wherein: Obtain the current frost status of the refrigerator, including: Obtain the number of times the refrigerator door is opened and closed during this operation cycle, the time of each door opening, and the ambient humidity during each door opening; The current frosting condition of the refrigerator is determined according to the number of door opening and closing times, the door opening time, and the ambient humidity.

3. The defrost control method for a refrigerator according to claim 1, wherein: Obtaining an estimated frost condition of the refrigerator during the next non-off-peak period, including: Obtaining historical frost conditions of the refrigerator during the previous non-low-power consumption period; The historical frosting condition is determined as the estimated frosting condition.

4. The defrost control method for a refrigerator according to claim 1, wherein: Obtaining an estimated frost condition of the refrigerator during the next non-off-peak period, including: Obtaining historical frost conditions of the refrigerator during at least two recent non-off-peak periods; An average value of at least two of the historical frosting conditions or the one with the largest amount of frost among the at least two historical frosting conditions is determined as the estimated frosting condition.

5. The defrost control method for a refrigerator according to claim 1, wherein: The defrost parameters include the heating power of the heating device on the refrigerator and / or the heating time of the heating device; and / or, The historical defrost cycle is an average value of multiple previous defrost cycles of the refrigerator.

6. The defrost control method for a refrigerator according to claim 1, wherein: The defrost control method further includes: In response to the current time being within a preset time period and the refrigerator meeting a defrosting condition, controlling the refrigerator to start defrosting; The starting time of the preset period is the same as the starting time of the low electricity consumption period, and the ending time of the preset period is earlier than the preset time, so as to ensure that the refrigerator completes defrosting before the end of the current low electricity consumption period.

7. The defrost control method for a refrigerator according to any one of claims 1 to 4, wherein: The defrost control method further includes: In response to the refrigerator receiving an instruction to enter an energy-saving mode, the refrigerator is controlled to obtain a current time.

8. A refrigerator comprising: evaporator; a heating device for heating the evaporator; a memory storing execution instructions; A controller is configured to execute the execution instruction so that the refrigerator executes the defrost control method according to any one of claims 1 to 7.

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