Refrigerator defrosting system, method, device, equipment and storage medium

Abstract

The present application relates to a defrosting system, method, device, equipment and storage medium for a refrigerator. The system includes: a control device and a low-temperature four-way valve connected to the control device; the low-temperature four-way valve is arranged at the low-temperature stage of the refrigerator, connecting the low-temperature compressor, the low-temperature evaporator and the low-temperature pre-cooling section; after the control device receives the defrosting message of the refrigerator, the low-temperature four-way valve is controlled to switch to the low-temperature defrosting mode; in the low-temperature defrosting mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator; after the control device detects that the defrosting of the refrigerator is completed, the low-temperature four-way valve is controlled to switch to the low-temperature refrigeration mode; in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature pre-cooling section. The present application can solve the problem of frost and ice on the inner wall of the refrigerator box, defrost the frost layer in time, and ensure the refrigeration efficiency of the refrigerator and the refrigeration temperature inside the box.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration systems, and in particular to a defrosting system, method, device, equipment and storage medium for a refrigerator. Background Art

[0002] With the continuous advancement of science and technology, the cascade refrigeration system has achieved remarkable results in obtaining low temperatures and can now be used in low-temperature products of -40℃ to -60℃, ultra-low-temperature products of -86℃ and deep-low-temperature products of -150℃.

[0003] For refrigerators that use a cascade refrigeration system, since the temperature inside the preservation box is much lower than the external ambient temperature, when the product door is opened or closed, the gas inside and outside the preservation box is exchanged, and the external high-temperature and high-humidity gas enters the preservation box. After the door is closed, the temperature inside the preservation box drops, and frost will form on the wall inside the preservation box. As the number of door openings increases, the frost layer on the wall inside the preservation box will repeatedly melt and frost, and eventually form an ice layer on the wall. Since the preservation box uses direct cooling to ensure temperature uniformity, the ice layer formed on the wall will affect the refrigeration efficiency of the refrigerator to a certain extent.

[0004] Therefore, how to defrost a refrigerator has become a problem that needs to be solved urgently in this field. Summary of the invention

[0005] The present application provides a defrosting system, method, device, equipment and storage medium for a refrigerator to solve the problem that the wall surface of a preservation box of the refrigerator is repeatedly frosted, which easily affects the refrigeration effect.

[0006] In view of the above technical problems, the technical solution of this application is solved by the following embodiments:

[0007] The embodiment of the present application provides a defrost system for a refrigerator, the defrost system of the refrigerator comprising: a control device, a low-temperature four-way valve connected to the control device and a high-temperature four-way valve connected to the control device; the low-temperature four-way valve is arranged at the low-temperature stage of the refrigerator, connecting the low-temperature compressor, the low-temperature evaporator and the low-temperature pre-cooling section; the high-temperature four-way valve is arranged at the high-temperature stage of the refrigerator, connecting the high-temperature compressor, the intermediate heat exchanger and the high-temperature condenser; after receiving the defrost message of the refrigerator, the control device controls the low-temperature four-way valve to switch to the low-temperature defrost mode; wherein, in the low-temperature defrost mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator; the control device detects that the defrost of the refrigerator is completed After completion, the low-temperature four-way valve is controlled to switch to the low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant in the low-temperature stage flows from the low-temperature compressor to the low-temperature pre-cooling section; after the control device controls the low-temperature four-way valve to switch to the low-temperature defrosting mode, and detects that the low-temperature stage meets the preset high-temperature compensation condition, the control device controls the high-temperature four-way valve to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant in the high-temperature stage flows from the high-temperature compressor to the intermediate heat exchanger; after the control device detects that the defrosting of the refrigerator is completed, the control device controls the high-temperature four-way valve to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant in the high-temperature stage flows from the high-temperature compressor to the high-temperature condenser.

[0008] Among them, the defrost system of the refrigerator also includes: a frost layer temperature sensor connected to the control device and arranged inside the box of the refrigerator; the frost layer temperature sensor collects the box temperature inside the box and reports the box temperature inside the box to the control device; when the control device detects that the box temperature is greater than the preset defrost warning temperature, it issues a preset refrigerator defrost prompt, and receives the refrigerator defrost message in response to the refrigerator defrost prompt; when the control device detects that the box temperature is greater than the preset defrost end temperature, it determines that the refrigerator defrost is completed.

[0009] Among them, the defrost system of the refrigerator also includes: a mode temperature sensor connected to the control device and arranged in the low-temperature pre-cooling section; the mode temperature sensor collects the pre-cooling temperature of the low-temperature pre-cooling section and reports the pre-cooling temperature of the low-temperature pre-cooling section to the control device; when the control device detects that the pre-cooling temperature is lower than the preset defrost evaporation temperature, it determines that the low-temperature stage meets the high-temperature stage compensation condition.

[0010] The embodiment of the present application also provides a defrosting method for a refrigerator, which is applied to a control device in a defrosting system of a refrigerator described in any one of the above items, comprising: receiving a defrosting message for the refrigerator; after receiving the defrosting message for the refrigerator, controlling a preset low-temperature stage four-way valve to switch to a low-temperature defrosting mode; wherein, in the low-temperature defrosting mode, the refrigerant of the low-temperature stage flows from the low-temperature stage compressor to the low-temperature stage evaporator, so as to defrost the refrigerator; after detecting that the defrosting of the refrigerator is completed, controlling the low-temperature stage four-way valve to switch to a low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage The refrigerant flow direction is from the low-temperature compressor to the low-temperature pre-cooling section; after controlling the low-temperature four-way valve to switch to the low-temperature defrosting mode, when it is detected that the low-temperature stage meets the preset high-temperature compensation condition, the preset high-temperature four-way valve is controlled to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature compressor to the intermediate heat exchanger; after detecting that the defrosting of the refrigerator is completed, the high-temperature four-way valve is controlled to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature compressor to the high-temperature condenser.

[0011] Wherein, the receiving of refrigerator defrost message includes: detecting the internal temperature of the refrigerator box by a frost layer temperature sensor arranged inside the refrigerator box; when it is detected that the internal temperature of the refrigerator box is greater than the preset defrost warning temperature, issuing a preset refrigerator defrost prompt, and receiving the refrigerator defrost message in response to the refrigerator defrost prompt; after the control of the preset low-temperature level four-way valve switching to the low-temperature defrost mode, it also includes: when it is detected that the internal temperature of the refrigerator box is greater than the preset defrost end temperature, determining that the refrigerator defrost is completed.

[0012] Wherein, before the control switches the preset high-temperature stage four-way valve to the high-temperature compensation mode, it also includes: detecting the pre-cooling temperature of the low-temperature stage pre-cooling section by means of a mode temperature sensor arranged in the low-temperature stage pre-cooling section; when it is detected that the pre-cooling temperature is lower than the preset defrosting evaporation temperature, determining that the low-temperature stage satisfies the high-temperature stage compensation condition, and controlling the preset high-temperature stage four-way valve to switch to the high-temperature compensation mode.

[0013] The embodiment of the present application also provides a defrost device for a refrigerator, comprising: a message receiving module for receiving a defrost message for the refrigerator; a first switching module for controlling a preset low-temperature four-way valve to switch to a low-temperature defrost mode after receiving the defrost message for the refrigerator; wherein, in the low-temperature defrost mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator so as to defrost the refrigerator; after controlling the low-temperature four-way valve to switch to the low-temperature defrost mode, when it is detected that the low-temperature stage satisfies the preset high-temperature compensation condition, controlling the preset high-temperature four-way valve to switch to the high-temperature compensation mode ; Wherein, in the high-temperature compensation mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor to the intermediate heat exchanger; the second switching module is used to control the low-temperature stage four-way valve to switch to the low-temperature refrigeration mode after detecting that the defrosting of the refrigerator is completed; wherein, in the low-temperature refrigeration mode, the refrigerant flow direction of the low-temperature stage is from the low-temperature stage compressor to the low-temperature stage pre-cooling section; when the high-temperature stage four-way valve is switched to the high-temperature compensation mode, the high-temperature stage four-way valve is controlled to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor to the high-temperature stage condenser.

[0014] An embodiment of the present application also provides a defrost device for a refrigerator, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to: execute a defrost program for the refrigerator stored in the memory to implement the defrost method for the refrigerator described in any one of the above items.

[0015] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer-executable message, and the computer-executable message is executed to implement any of the above-mentioned defrosting methods for a refrigerator.

[0016] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the system provided by the embodiment of the present application may include a control device and a low-temperature four-way valve connected to the control device; the low-temperature four-way valve is arranged at the low-temperature stage of the refrigerator, connecting the low-temperature compressor, the low-temperature evaporator and the low-temperature pre-cooling section; after the control device receives the defrosting message of the refrigerator, it controls the low-temperature four-way valve to switch to the low-temperature defrosting mode; wherein, in the low-temperature defrosting mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator; after the control device detects that the defrosting of the refrigerator is completed, it controls the low-temperature four-way valve to switch to the low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature pre-cooling section. The defrosting system of the refrigerator provided by the embodiment of the present application can solve the problem of frost and ice on the inner wall of the refrigerator box, defrost the frost layer in time, and ensure the refrigeration efficiency of the refrigerator and the refrigeration temperature inside the box. The defrost system of the refrigerator in the embodiment of the present application has a simple structure. A four-way valve is added to the refrigeration passage of the refrigerator, and a defrost control program is added to the control device. It is easy to implement and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 is a structural diagram of a defrosting system of a refrigerator according to an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the refrigerant flow direction of the low-temperature stage in the low-temperature defrosting mode according to an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the refrigerant flow direction of the low-temperature stage in the low-temperature refrigeration mode according to an embodiment of the present application;

[0023] Figure 4 is a structural diagram of a defrosting system of a refrigerator according to another embodiment of the present application;

[0024] Figure 5 A schematic diagram of the refrigerant flow direction at a high temperature stage in a high temperature compensation mode according to an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the refrigerant flow direction of a high temperature stage in a high temperature refrigeration mode according to an embodiment of the present application;

[0026] Figure 7 is a flow chart of a defrosting method for a refrigerator according to an embodiment of the present application;

[0027] Figure 8 is a structural diagram of a defrosting device of a refrigerator according to an embodiment of the present application;

[0028] Fig. 9 The present invention is a structural diagram of a defrosting device for a refrigerator according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] In order to solve the problem that the inner wall of the storage box in the refrigerator is frosted and iced, which easily affects the refrigeration effect of the refrigerator, the embodiment of the present application provides a defrosting system of the refrigerator. The refrigerator can be a cascade refrigerator. For example: a refrigerator with a two-stage cascade refrigeration system of an ultra-low temperature storage box.

[0032] The defrosting system of the refrigerator of the embodiment of the present application is described below in conjunction with the structure of the cascade refrigerator. Figure 1As shown in FIG. 1 , it is a structural diagram of a defrosting system of a refrigerator according to an embodiment of the present application. Since the present application embodiment is a defrosting system implemented in combination with a low temperature stage, Figure 1 Only the low temperature stage of the refrigerator is shown, and in order to facilitate the understanding of the embodiments of the present application, only the main components in the refrigerator are mentioned.

[0033] In the defrosting system of the refrigerator, it includes: a control device 1 and a low-temperature four-way valve 2 connected to the control device 1. Among them, the control device 1 can be connected to the low-temperature four-way valve 2 in a wired or wireless manner. The low-temperature four-way valve 2 is a four-way reversing valve. For example, the low-temperature four-way valve 2 is an electromagnetic four-way reversing valve, the control device 1 is electrically connected to the low-temperature four-way valve 2, and the low-temperature four-way valve 2 can adjust the flow direction of the low-temperature refrigerant under the control of the control device 1.

[0034] In a cascade refrigerator, there are low-temperature stage and high-temperature stage. The low-temperature stage refers to a low-temperature refrigeration system with a lower refrigeration temperature. The high-temperature stage refers to a high-temperature refrigeration system with a higher refrigeration temperature.

[0035] The low temperature stage of the cascade refrigerator includes: a low temperature stage compressor 3, a low temperature stage evaporator 4, a low temperature stage capillary tube 10, an intermediate heat exchanger 5 for exchanging heat with the high temperature stage, and a low temperature stage precooling section 6.

[0036] The low-temperature four-way valve 2 is arranged at the low-temperature stage of the refrigerator, connecting the low-temperature compressor 3, the low-temperature evaporator 4 and the low-temperature pre-cooling section 6.

[0037] After receiving the defrosting message of the refrigerator, the control device 1 controls the low-temperature four-way valve 2 to switch to the low-temperature defrosting mode. In the low-temperature defrosting mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor 3 to the low-temperature evaporator 4.

[0038] The refrigerator defrost message is used to instruct the refrigerator to defrost the box (storage box). The refrigerator defrost message may come from the client corresponding to the refrigerator.

[0039] The low-temperature defrosting mode refers to a mode in which the low-temperature four-way valve 2 adjusts the refrigerant flow direction of the refrigerant in the low-temperature stage, so that the refrigerant flows out of the low-temperature compressor 3, passes through the low-temperature four-way valve 2, and first reaches the low-temperature evaporator 4 to defrost the refrigerator.

[0040] like Figure 2As shown, it is a schematic diagram of the refrigerant flow direction of the low temperature stage in the low temperature defrosting mode according to an embodiment of the present application. In the low temperature defrosting mode, the low temperature compressor 3 outputs the refrigerant, and the refrigerant passes through the low temperature four-way valve 2, flows through the low temperature evaporator 4, the low temperature capillary 10, the intermediate heat exchanger 5, the low temperature pre-cooling section 6, and passes through the low temperature four-way valve 2 again to return to the low temperature compressor 3. Specifically, under the control of the control device 1, the low temperature four-way valve 2 switches to the low temperature defrosting mode, and the refrigerant in the low temperature stage is compressed into a (high temperature and high pressure) gas in the low temperature compressor 3. The gas passes through the low temperature four-way valve 2 and enters the low temperature evaporator 4. The high temperature gas heats the box of the refrigerator in the low temperature evaporator 4, so that the frost layer on the inner wall of the box melts, and the gas condenses into liquid. The high temperature and high pressure liquid formed by condensation enters the low temperature capillary 10, and the low temperature capillary 10 throttles to become a low temperature and low pressure liquid and enters the intermediate heat exchanger 5, exchanges heat with the refrigerant in the high temperature stage in the intermediate heat exchanger 5, and then enters the low temperature pre-cooling section 6 for evaporation. Furthermore, the low-temperature evaporator 4 is attached to the outer side of the inner wall of the box, and the high-temperature gas in the low-temperature evaporator 4 can heat the box, and by heating the box, the temperature inside the box rises, and the frost layer on the inner wall of the box is melted. In this way, in the low-temperature defrosting mode, the low-temperature evaporator 4 acts as a condenser, and can heat the box by releasing heat, so that the temperature inside the box rises and the frost layer on the inner wall of the box is melted. The low-temperature precooling section 6 acts as an evaporator, and the refrigerant evaporates in the low-temperature precooling section 6.

[0041] After the control device 1 detects that the refrigerator has completed defrosting, it controls the low-temperature stage four-way valve 2 to switch to the low-temperature refrigeration mode. In the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature stage compressor 3 to the low-temperature stage pre-cooling section 6 to defrost the refrigerator.

[0042] The low-temperature refrigeration mode refers to a mode in which the low-temperature four-way valve 2 adjusts the refrigerant flow direction of the refrigerant in the low-temperature stage, so that the refrigerant flows out of the low-temperature compressor 3, passes through the low-temperature four-way valve 2, and first enters the low-temperature pre-cooling section 6, so that the refrigerator can refrigerate normally.

[0043] like Figure 3As shown, it is a schematic diagram of the refrigerant flow direction of the low-temperature stage in the low-temperature refrigeration mode according to an embodiment of the present application. In the low-temperature refrigeration mode, the low-temperature compressor 3 outputs the refrigerant, and the refrigerant passes through the low-temperature four-way valve 2, flows through the low-temperature pre-cooling section 6, the intermediate heat exchanger 5, the low-temperature capillary 10, the low-temperature evaporator 4, and passes through the low-temperature four-way valve 2 again, and returns to the low-temperature compressor 3. Specifically, under the control of the control device 1, the low-temperature four-way valve 2 switches to the low-temperature refrigeration mode. Since the low-temperature four-way valve 2 does not change the original refrigerant path of the refrigerator in the low-temperature refrigeration mode, the refrigeration principle of the refrigerator has not changed, and it will not be repeated here. That is to say: in the low-temperature refrigeration mode, the flow direction of the refrigerant in the low-temperature stage is the flow direction during normal refrigeration, and the refrigerant flows forward. Only in the low-temperature defrosting mode, the flow direction of the refrigerant in the low-temperature stage is opposite to the flow direction during normal refrigeration, and the refrigerant flows in reverse.

[0044] In the embodiment of the present application, the defrost system of the refrigerator further includes: a frost layer temperature sensor (not shown in the figure) connected to the control device 1 and arranged inside the cabinet of the refrigerator.

[0045] The frost layer temperature sensor collects the internal temperature of the box and reports the internal temperature of the box to the control device 1. When the control device 1 detects that the internal temperature of the box is greater than the preset defrost warning temperature, it issues a preset refrigerator defrost reminder, and receives the refrigerator defrost message for the refrigerator defrost reminder. When the control device 1 detects that the internal temperature of the box is greater than the preset defrost end temperature, it determines that the refrigerator defrost is completed.

[0046] Furthermore, the frost layer temperature sensor can be set at the lowest part of the box, so that the box temperature detected by the frost layer temperature sensor is equivalent to the frost layer temperature. In particular, due to the principle of thermal expansion and contraction, hot air will float up, so when the refrigerator is defrosted, the upper frost layer in the box will melt first, and the lower frost layer will melt later, so the frost layer temperature sensor is set on the inner wall at the lowest part of the box, and the detected box temperature can accurately reflect the temperature conditions inside the box. The embodiment of the present application uses a frost layer temperature sensor to detect and warn the defrosting time, which can remind the user to defrost and transfer items before the temperature rises in the box, and the response is more accurate and faster, while avoiding losses caused by temperature rise in the box.

[0047] In the embodiment of the present application, in order to make the communication mode of the low-temperature four-way valve 2 easier to understand, the low-temperature four-way valve 2 of the embodiment of the present application is further described below.

[0048] The low temperature four-way valve 2 is arranged at the low temperature stage of the refrigerator. The low temperature four-way valve 2 comprises: a first exhaust port, a first air intake port, a first condensation port and a first evaporation port.

[0049] The first exhaust port is connected to the exhaust port of the low temperature stage compressor 3 .

[0050] The first air intake port is connected to the air intake port of the low temperature stage compressor 3 .

[0051] The first condensation port is connected to the inlet of the low-temperature pre-cooling section 6 .

[0052] The first evaporation port is connected to the outlet of the low-temperature stage evaporator 4 .

[0053] Through the above-mentioned connection method, the low-temperature stage four-way valve 2 can realize the flow direction switching of the refrigerant in the low-temperature stage.

[0054] In the embodiment of the present application, since the pipeline of the low-temperature condensation section is short, the refrigerant may not evaporate sufficiently, causing the low-temperature compressor 3 to have a problem of suction liquid. In order to deal with this problem, the embodiment of the present application can adopt a high-temperature compensation method to fully evaporate the refrigerant before entering the low-temperature compressor 3. Figure 4 , which is a structural diagram of a defrost system of a refrigerator according to another embodiment of the present application.

[0055] The defrost system of the refrigerator includes not only a control device 1 and a low-temperature four-way valve 2 connected to the control device 1, but also a high-temperature four-way valve 7 connected to the control device 1. The control device 1 can be connected to the high-temperature four-way valve 7 by wire or wireless. The high-temperature four-way valve 7 is a four-way reversing valve. For example, the high-temperature four-way valve 7 is an electromagnetic four-way reversing valve, the control device 1 is electrically connected to the high-temperature four-way valve 7, and the high-temperature four-way valve 7 can adjust the flow direction of the high-temperature refrigerant under the control of the control device 1.

[0056] In order to make the refrigerant flow control, the heating and defrosting process, and the high temperature level compensation process easier to understand, the control device 1 is not shown in the subsequent figures.

[0057] The high temperature stage four-way valve 7 is arranged at the high temperature stage of the refrigerator, connecting the high temperature stage compressor 9, the intermediate heat exchanger 5 and the high temperature stage condenser 8. The high temperature stage four-way valve 7 can be used to adjust the flow direction of the refrigerant at the high temperature stage.

[0058] After controlling the low-temperature four-way valve 2 to switch to the low-temperature defrosting mode, and detecting that the low-temperature stage meets the preset high-temperature stage compensation conditions, the control device 1 controls the high-temperature four-way valve 7 to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor 9 to the intermediate heat exchanger 5.

[0059] The high temperature stage compensation condition is used to measure whether the refrigerant in the low temperature stage has been fully evaporated before entering the low temperature stage compressor 3 when the low temperature stage defrosts the refrigerator. If the low temperature stage meets the high temperature compensation condition, it means that the refrigerant has not been fully evaporated before entering the low temperature stage compressor 3, and the refrigerant includes liquid and gas. If the low temperature stage does not meet the high temperature supplementary condition, it means that the refrigerant has been fully evaporated before entering the low temperature stage compressor 3, and the refrigerant is gas.

[0060] The high temperature compensation mode refers to a mode in which the high temperature stage four-way valve 7 adjusts the refrigerant flow direction of the refrigerant in the high temperature stage. The refrigerant flows out of the high temperature stage compressor 9, passes through the high temperature stage four-way valve 7, and sequentially enters the intermediate heat exchanger 5, the high temperature stage capillary 11 and the high temperature stage condenser 8, so that the refrigerant in the high temperature stage heats the refrigerant in the low temperature stage, so that the refrigerant in the low temperature stage is fully evaporated before entering the low temperature stage compressor 3.

[0061] like Figure 5 As shown, it is a schematic diagram of the refrigerant flow direction of the high temperature stage under the high temperature compensation mode according to an embodiment of the present application. In the high temperature compensation mode, the high temperature stage compressor 9 outputs the refrigerant, and the refrigerant passes through the high temperature stage four-way valve 7, flows through the intermediate heat exchanger 5, the high temperature stage capillary 11 and the high temperature stage condenser 8, and returns to the high temperature stage compressor 9 through the high temperature stage four-way valve 7 again. Specifically, under the control of the control device 1, the high temperature stage four-way valve 7 switches to the high temperature compensation mode, and the refrigerant in the high temperature stage is compressed into a (high temperature and high pressure) gas in the high temperature stage compressor 9. The gas exchanges heat with the refrigerant in the low temperature stage that has condensed into a liquid through the intermediate heat exchanger 5, performs temperature compensation on the low temperature stage, and accelerates the evaporation of the refrigerant in the low temperature stage; then the refrigerant in the high temperature stage flows through the high temperature stage capillary 11 and enters the high temperature stage condenser 8, and the high temperature stage condenser 8 acts as an evaporator. Then, the refrigerant in the high temperature stage condenser 8 returns to the high temperature stage compressor 9 again through the high temperature stage four-way valve 7. By temperature compensation of the low temperature stage by the high temperature stage, the refrigerant in the low temperature stage can be finally evaporated into gas and enter the low temperature stage compressor 3, so as to avoid the low temperature stage compressor 3 from sucking in liquid and causing damage to the low temperature stage compressor 3.

[0062] After detecting that the defrosting of the refrigerator is completed, the control device 1 controls the high-temperature four-way valve 7 to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the high-temperature refrigerant flows from the high-temperature compressor 9 to the high-temperature condenser 8.

[0063] The high temperature refrigeration mode refers to the high temperature stage four-way valve 7 adjusting the refrigerant flow direction of the refrigerant in the high temperature stage. The refrigerant flows out of the high temperature stage compressor 9, passes through the high temperature stage four-way valve 7, and first enters the high temperature stage condenser 8, so that the refrigerator can cool normally.

[0064] like Figure 6 As shown, it is a schematic diagram of the refrigerant flow direction of the high temperature stage in the high temperature refrigeration mode according to an embodiment of the present application. In the high temperature refrigeration mode, the high temperature stage compressor 9 outputs the refrigerant, and the refrigerant passes through the high temperature stage four-way valve 7, flows through the high temperature stage condenser 8, the high temperature stage capillary 11 and the intermediate heat exchanger 5, passes through the high temperature stage four-way valve 7 again, and returns to the high temperature stage compressor 9. Further, under the control of the control device 1, the high temperature stage four-way valve 7 switches to the high temperature refrigeration mode. In the high temperature refrigeration mode, the high temperature stage four-way valve 7 does not change the original path of the high temperature stage, and the refrigeration principle of the high temperature stage does not change, so the refrigeration principle of the high temperature stage will not be described in detail here.

[0065] In an embodiment of the present application, the defrost system of the refrigerator also includes: a mode temperature sensor connected to the control device 1 and arranged in the low-temperature pre-cooling section 6; the mode temperature sensor collects the pre-cooling temperature of the low-temperature pre-cooling section 6 and reports the pre-cooling temperature of the low-temperature pre-cooling section 6 to the control device 1; when the control device 1 detects that the pre-cooling temperature is lower than the preset defrost evaporation temperature, it determines that the low-temperature stage satisfies the high-temperature stage compensation condition.

[0066] Furthermore, the mode temperature sensor can be arranged on the outer wall of the low temperature stage precooling section 6. Since the low temperature stage precooling section 6 is relatively short, during the defrosting process of the refrigerator, the precooling temperature of the low temperature stage precooling section 6 can be used to reflect whether the refrigerant in the low temperature stage has been fully evaporated. Therefore, the embodiment of the present application controls the start timing of the high temperature stage by arranging the mode temperature sensor, that is, when the precooling temperature is lower than the defrosting evaporation temperature, it is determined that the refrigerant in the low temperature stage has not been fully evaporated, and the high temperature stage needs to be used to compensate for the heating temperature.

[0067] In the embodiment of the present application, the connection mode of the high temperature four-way valve 7 is similar to the connection mode of the low temperature four-way valve 2. The high temperature four-way valve 7 is arranged at the high temperature stage of the refrigerator. The high temperature four-way valve 7 includes: a second exhaust port, a second air intake port, a second condensation port and a second evaporation port.

[0068] The second exhaust port is connected to the exhaust port of the high temperature stage compressor 9 .

[0069] The second air intake port is connected to the air intake port of the high temperature stage compressor 9 .

[0070] The second condensation port is connected to the inlet of the high temperature stage condenser 8 .

[0071] The second evaporation port is connected to the outlet of the intermediate heat exchanger 5 .

[0072] Through the above connection method, the high-temperature stage four-way valve 7 can switch the flow direction of the refrigerant in the high-temperature stage.

[0073] The defrost system of the refrigerator provided in the embodiment of the present application can solve the problem of frost and ice on the inner wall of the refrigerator box, defrost the frost layer in time, and ensure the refrigeration efficiency of the refrigerator and the refrigeration temperature inside the box. The defrost system of the refrigerator in the embodiment of the present application has a simple structure. A four-way valve is added to the refrigeration passage of the refrigerator, and a defrost control program (for realizing the defrost method of the refrigerator below) is added to the control device 1. It is easy to implement and has low cost. Moreover, the embodiment of the present application adopts direct cooling defrosting, and the defrosting process is energy-saving and efficient.

[0074] Based on the defrosting system of the refrigerator, the embodiment of the present application provides a defrosting method for the refrigerator. The execution subject of this embodiment is the control device 1 mentioned above. Figure 7 2 is a flow chart of a defrosting method for a refrigerator according to an embodiment of the present application.

[0075] Step S710, receiving a refrigerator defrost message.

[0076] Step S720, after receiving the defrost message of the refrigerator, control the preset low-temperature four-way valve to switch to the low-temperature defrost mode; wherein, in the low-temperature defrost mode, the low-temperature refrigerant flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator.

[0077] Step S730, after detecting that the refrigerator has completed defrosting, control the low-temperature four-way valve to switch to a low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature stage compressor to the low-temperature stage pre-cooling section.

[0078] In an embodiment of the present application, a frost layer temperature sensor is provided inside the cabinet of the refrigerator to detect the internal temperature of the cabinet; when it is detected that the internal temperature is greater than a preset defrost warning temperature, a preset refrigerator defrost prompt is issued, and in response to the refrigerator defrost prompt, the refrigerator defrost message is received; when it is detected that the internal temperature is greater than a preset defrost end temperature, it is determined that the refrigerator defrost is completed.

[0079] The defrost warning temperature is used to measure whether the frost layer on the inner wall of the refrigerator has begun to affect the temperature inside the cabinet. If the temperature inside the cabinet is less than or equal to the defrost warning temperature, it means that the frost layer on the inner wall of the cabinet has little impact on the problems inside the cabinet, and no defrosting is required. If the temperature inside the cabinet is greater than the defrost warning temperature, it means that the frost layer on the inner wall of the cabinet has a greater impact on the problems inside the cabinet, and defrosting is required.

[0080] The defrost end temperature is used to measure whether the frost layer on the inner wall of the refrigerator box has melted. If the temperature inside the box is greater than the defrost end temperature, it means that the temperature inside the box is sufficient and the frost layer has melted. If the temperature inside the box is less than or equal to the defrost end temperature, it means that the temperature inside the box is not enough and the frost layer may not be completely melted.

[0081] Generally speaking, the defrost warning temperature and the defrost end temperature are both empirical values ​​or values ​​obtained through experiments.

[0082] The refrigerator defrost reminder is used to remind the user to defrost the cabinet in the refrigerator. After the user sees the refrigerant defrost reminder, he can move the items in the cabinet and send a refrigerator defrost message through the client. For example: the user triggers the refrigerator defrost button, and then sends a refrigerator defrost message.

[0083] The refrigerator defrost message is used to instruct the refrigerator to defrost the cabinet.

[0084] In an embodiment of the present application, the control device may send a refrigerator defrost reminder to the client corresponding to the refrigerator; the receiving client returns a refrigerator defrost message in response to the refrigerator defrost reminder. For example: after receiving the refrigerator defrost reminder, the client may choose to defrost the refrigerator immediately, or may choose to defrost the refrigerator after a preset time, or may choose not to defrost the refrigerator temporarily; if the client detects that the user chooses to defrost the refrigerator immediately, it immediately sends a refrigerator defrost message to the control device; if the client detects that the user chooses to defrost the refrigerator after a preset time, it sends a refrigerator defrost message to the control device after the preset time; if the client detects that the user chooses not to defrost the refrigerator temporarily, it does not send a refrigerator defrost message to the control device.

[0085] In an embodiment of the present application, after controlling the low-temperature four-way valve to switch to the low-temperature defrost mode, it is also possible to control the preset high-temperature four-way valve to switch to the high-temperature compensation mode when it is detected that the low-temperature stage meets the preset high-temperature compensation condition; wherein, in the high-temperature compensation mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor to the intermediate heat exchanger; after detecting that the defrosting of the refrigerator is completed, the high-temperature four-way valve is controlled to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor to the high-temperature stage condenser.

[0086] The high temperature compensation condition is used to measure whether the refrigerant in the low temperature stage has completely evaporated into gas before entering the low temperature compressor. If the low temperature stage meets the high temperature compensation condition, it means that the refrigerant in the low temperature stage may exist in two states, gas and liquid, when entering the low temperature compressor. If the low temperature stage does not meet the high temperature compensation condition, it means that the refrigerant in the low temperature stage has completely evaporated into gas before entering the low temperature compressor.

[0087] Furthermore, by setting a mode temperature sensor in the low-temperature pre-cooling section, the pre-cooling temperature of the low-temperature pre-cooling section is detected; when it is detected that the pre-cooling temperature is lower than the preset defrost evaporation temperature, it is determined that the low-temperature stage meets the high-temperature stage compensation condition.

[0088] The defrost evaporation temperature is used to measure whether the refrigerant in the low temperature stage is completely evaporated in the low temperature stage pre-cooling section during the defrosting process of the refrigerator. If the pre-cooling temperature is less than the preset defrost evaporation temperature, it means that the refrigerant in the low temperature stage is not completely evaporated in the low temperature stage pre-cooling section. If the pre-cooling temperature is greater than or equal to the defrost evaporation temperature, it means that the refrigerant in the low temperature stage has been completely evaporated in the low temperature stage pre-cooling section. The defrost evaporation temperature is an empirical value or a value obtained through experiments.

[0089] The embodiment of the present application can perform defrost warning and defrost processing before frost forms on the inner wall of the box and affects the refrigeration effect, avoiding the problem of ice layer forming on the wall affecting the refrigeration efficiency and causing the temperature in the box to rise. The embodiment of the present application can control the low-temperature defrost mode, and by changing the flow direction of the refrigerant and heating and defrosting the box, the defrost process can be made more energy-efficient. The embodiment of the present application can also control the high-temperature compensation mode, and perform temperature compensation on the refrigerant in the low-temperature stage to avoid the problem of liquid inhalation in the low-temperature compressor.

[0090] The present application also provides a defrosting device for a refrigerator. Figure 8 , which is a structural diagram of a defrosting device of a refrigerator according to an embodiment of the present application.

[0091] The defrosting device of the refrigerator comprises:

[0092] The message receiving module 810 is used to receive a refrigerator defrosting message.

[0093] The first switching module 820 is used to control the preset low-temperature four-way valve to switch to the low-temperature defrost mode after receiving the defrost message of the refrigerator; wherein, in the low-temperature defrost mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator; after controlling the low-temperature four-way valve to switch to the low-temperature defrost mode, when it is detected that the low-temperature stage meets the preset high-temperature compensation condition, the preset high-temperature four-way valve is controlled to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant of the high-temperature stage flows from the high-temperature compressor to the intermediate heat exchanger.

[0094] The second switching module 830 is used to control the low-temperature four-way valve to switch to the low-temperature refrigeration mode after detecting that the defrosting of the refrigerator is completed; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature pre-cooling section; when the high-temperature four-way valve is switched to the high-temperature compensation mode, the high-temperature four-way valve is controlled to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant of the high-temperature stage flows from the high-temperature compressor to the high-temperature condenser.

[0095] The functions of the device described in the embodiment of the present application have been described in the above method embodiment. Therefore, for any details not provided in the description of this embodiment, please refer to the relevant descriptions in the above embodiment and will not be repeated here.

[0096] The present application also provides a defrosting device for a refrigerator, such as Fig. 9 , which is a structural diagram of a defrosting device for a refrigerator according to an embodiment of the present application.

[0097] The defrosting device of the refrigerator includes: a processor 910, a communication interface 920, a memory 930 and a communication bus 940. The processor 910, the communication interface 920 and the memory 930 communicate with each other through the communication bus 940.

[0098] The memory 930 is used to store computer programs.

[0099] In one embodiment of the present application, the processor 910, when executing the program stored in the memory 930, implements the defrosting method of the refrigerator provided by any of the aforementioned method embodiments, including: receiving a defrosting message for the refrigerator; after receiving the defrosting message for the refrigerator, controlling a preset low-temperature four-way valve to switch to a low-temperature defrosting mode; wherein, in the low-temperature defrosting mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator; after detecting that the defrosting of the refrigerator is completed, controlling the low-temperature four-way valve to switch to a low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature pre-cooling section.

[0100] Wherein, after controlling the low-temperature four-way valve to switch to the low-temperature defrost mode, it also includes: when it is detected that the low-temperature stage meets the preset high-temperature stage compensation condition, controlling the preset high-temperature stage four-way valve to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor to the intermediate heat exchanger; after detecting that the defrosting of the refrigerator is completed, controlling the high-temperature stage four-way valve to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant flow direction of the high-temperature stage is from the high-temperature stage compressor to the high-temperature stage condenser.

[0101] Wherein, the receiving of refrigerator defrost message includes: detecting the internal temperature of the refrigerator box by a frost layer temperature sensor arranged inside the refrigerator box; when it is detected that the internal temperature of the refrigerator box is greater than the preset defrost warning temperature, issuing a preset refrigerator defrost prompt, and receiving the refrigerator defrost message in response to the refrigerator defrost prompt; after the control of the preset low-temperature level four-way valve switching to the low-temperature defrost mode, it also includes: when it is detected that the internal temperature of the refrigerator box is greater than the preset defrost end temperature, determining that the refrigerator defrost is completed.

[0102] Wherein, before the control switches the preset high-temperature stage four-way valve to the high-temperature compensation mode, it also includes: detecting the pre-cooling temperature of the low-temperature stage pre-cooling section by means of a mode temperature sensor arranged in the low-temperature stage pre-cooling section; when it is detected that the pre-cooling temperature is lower than the preset defrosting evaporation temperature, determining that the low-temperature stage satisfies the high-temperature stage compensation condition, and controlling the preset high-temperature stage four-way valve to switch to the high-temperature compensation mode.

[0103] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the defrosting method for a refrigerator provided in any of the aforementioned method embodiments are implemented. Since the defrosting method for a refrigerator has been described in detail above, for any details not fully described in the description of this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further description will be given here.

[0104] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution can be essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of messages to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0106] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0107] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A defrosting system for a refrigerator, characterized in that: The defrosting system of the refrigerator comprises: a control device, a low-temperature four-way valve connected to the control device and a high-temperature four-way valve connected to the control device, a frost layer temperature sensor connected to the control device and arranged inside the box of the refrigerator; a mode temperature sensor connected to the control device and arranged in the low-temperature precooling section; The low-temperature four-way valve is arranged at the low-temperature stage of the refrigerator, connecting the low-temperature compressor, the low-temperature evaporator and the low-temperature pre-cooling section; the high-temperature four-way valve is arranged at the high-temperature stage of the refrigerator, connecting the high-temperature compressor, the intermediate heat exchanger and the high-temperature condenser; the low-temperature evaporator is attached to the outer side of the inner wall of the box; The frost layer temperature sensor collects the internal temperature of the box body and reports the internal temperature of the box body to the control device; When the control device detects that the temperature in the box is greater than the preset defrost warning temperature, the control device issues a preset refrigerator defrost prompt, and receives a refrigerator defrost message in response to the refrigerator defrost prompt; after receiving the refrigerator defrost message, the control device controls the low-temperature four-way valve to switch to a low-temperature defrost mode; wherein, in the low-temperature defrost mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator and melt the frost layer on the inner wall of the box; When the control device detects that the temperature in the box is greater than the preset defrosting end temperature, it determines that the refrigerator has completed defrosting; after the control device detects that the refrigerator has completed defrosting, it controls the low-temperature stage four-way valve to switch to the low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature stage compressor to the low-temperature stage pre-cooling section; After controlling the low-temperature four-way valve to switch to the low-temperature defrosting mode and detecting that the low-temperature stage meets the preset high-temperature stage compensation condition, the control device controls the high-temperature four-way valve to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant of the high-temperature stage flows from the high-temperature stage compressor to the intermediate heat exchanger; after detecting that the defrosting of the refrigerator is completed, the control device controls the high-temperature four-way valve to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant of the high-temperature stage flows from the high-temperature stage compressor to the high-temperature condenser; the mode temperature sensor collects the pre-cooling temperature of the low-temperature stage pre-cooling section and reports the pre-cooling temperature of the low-temperature stage pre-cooling section to the control device; when the control device detects that the pre-cooling temperature is lower than the preset defrosting evaporation temperature, it determines that the low-temperature stage meets the high-temperature compensation condition.

2. A defrosting method for a refrigerator, characterized in that: The control device used in the defrosting system of the refrigerator according to claim 1 comprises: Receive refrigerator defrost message; After receiving the defrosting message of the refrigerator, the preset low-temperature four-way valve is controlled to switch to the low-temperature defrosting mode; wherein, in the low-temperature defrosting mode, the low-temperature refrigerant flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator and melt the frost layer on the inner wall of the box; wherein, the low-temperature evaporator is attached to the outer side of the inner wall of the box; After detecting that the defrosting of the refrigerator is completed, controlling the low-temperature four-way valve to switch to a low-temperature refrigeration mode; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature stage compressor to the low-temperature stage pre-cooling section; After controlling the low-temperature four-way valve to switch to the low-temperature defrosting mode, when detecting that the low-temperature stage meets the preset high-temperature stage compensation condition, controlling the preset high-temperature four-way valve to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant of the high-temperature stage flows from the high-temperature stage compressor to the intermediate heat exchanger; after detecting that the defrosting of the refrigerator is completed, controlling the high-temperature four-way valve to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant of the high-temperature stage flows from the high-temperature stage compressor to the high-temperature stage condenser; Wherein, the receiving of refrigerator defrost message includes: detecting the box temperature inside the box by a frost layer temperature sensor arranged inside the box of the refrigerator; when it is detected that the box temperature is greater than the preset defrost warning temperature, issuing a preset refrigerator defrost prompt, and receiving the refrigerator defrost message in response to the refrigerator defrost prompt; after the control preset low-temperature stage four-way valve switches to the low-temperature defrost mode, it also includes: when it is detected that the box temperature is greater than the preset defrost end temperature, determining that the refrigerator defrost is completed; before the control preset high-temperature stage four-way valve switches to the high-temperature compensation mode, it also includes: detecting the pre-cooling temperature of the low-temperature stage pre-cooling section by a mode temperature sensor arranged in the low-temperature stage pre-cooling section; when it is detected that the pre-cooling temperature is less than the preset defrost evaporation temperature, determining that the low-temperature stage meets the high-temperature stage compensation condition, and controlling the high-temperature stage four-way valve to switch to the high-temperature compensation mode.

3. A defrosting device for a refrigerator, characterized in that: include: A message receiving module, for receiving a defrost message of a refrigerator; wherein, the receiving of the defrost message of a refrigerator comprises: detecting the temperature inside the refrigerator body by a frost layer temperature sensor arranged inside the refrigerator body; when it is detected that the temperature inside the refrigerator body is greater than a preset defrost warning temperature, issuing a preset defrost prompt of the refrigerator, and receiving the defrost message of the refrigerator in response to the defrost prompt of the refrigerator; after controlling a preset low-temperature level four-way valve to switch to a low-temperature defrost mode, it further comprises: when it is detected that the temperature inside the refrigerator body is greater than a preset defrost end temperature, determining that the defrost of the refrigerator is completed; The first switching module is used to control the preset low-temperature four-way valve to switch to the low-temperature defrost mode after receiving the defrost message of the refrigerator; wherein, in the low-temperature defrost mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature evaporator, so as to defrost the refrigerator and melt the frost layer on the inner wall of the box; wherein, the low-temperature evaporator is attached to the outer side of the inner wall of the box; after controlling the low-temperature four-way valve to switch to the low-temperature defrost mode, in the case of detecting that the low-temperature stage meets the preset high-temperature stage compensation condition, controlling the preset high-temperature stage four-way valve to switch to the high-temperature compensation mode; wherein, in the high-temperature compensation mode, the refrigerant of the high-temperature stage flows from the high-temperature compressor to the intermediate heat exchanger; before controlling the preset high-temperature stage four-way valve to switch to the high-temperature compensation mode, it also includes: detecting the precooling temperature of the low-temperature stage precooling section by a mode temperature sensor set in the low-temperature stage precooling section; when it is detected that the precooling temperature is less than the preset defrosting evaporation temperature, it is determined that the low-temperature stage meets the high-temperature stage compensation condition, and controlling the high-temperature stage four-way valve to switch to the high-temperature compensation mode; The second switching module is used to control the low-temperature four-way valve to switch to the low-temperature refrigeration mode after detecting that the defrosting of the refrigerator is completed; wherein, in the low-temperature refrigeration mode, the refrigerant of the low-temperature stage flows from the low-temperature compressor to the low-temperature pre-cooling section; when the high-temperature four-way valve is switched to the high-temperature compensation mode, the high-temperature four-way valve is controlled to switch to the high-temperature refrigeration mode; wherein, in the high-temperature refrigeration mode, the refrigerant of the high-temperature stage flows from the high-temperature compressor to the high-temperature condenser.

4. A defrosting device for a refrigerator, characterized in that: include: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor coupled to the at least one bus; At least one memory connected to the at least one bus, wherein the processor is configured to: execute a defrost program of a refrigerator stored in the memory to implement the defrost method of a refrigerator according to claim 2.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable messages, and the computer-executable messages are executed to implement the defrosting method for a refrigerator according to claim 2.

Images