CN107677033A - The defrosting control method and refrigerator of refrigerator - Google Patents

Abstract

The invention provides a method for controlling defrosting of a refrigerator and the refrigerator. The defrosting control method of the refrigerator includes: obtaining the defrosting start signal of the refrigerator; making the compressor, fan, heating device and branch air supply device work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; obtaining the defrosting starting signal of the refrigerator The defrosting end signal; and according to the defrosting end signal, make the compressor, fan, heating device and branch air supply device work according to the working state corresponding to the defrosting end signal. The scheme of the present invention can prevent condensation or even freezing into ice on the branch air supply device after defrosting, which will affect its normal operation, improve the working reliability of the branch air supply device, ensure the normal operation of the refrigerator, and improve the internal temperature of the refrigerator. The storage effect of food improves the user experience.

Description

Refrigerator defrosting control method and refrigerator

technical field

The invention relates to the field of refrigeration equipment, in particular to a method for controlling defrosting of a refrigerator and the refrigerator.

Background technique

With the development of society and the continuous improvement of people's living standards, people's pace of life is getting faster and faster, so they are more and more willing to buy a lot of food and put it in the refrigerator. The refrigerator has become one of the indispensable household appliances in people's daily life. .

However, the current air-cooled refrigerators have the following disadvantages: during the defrosting process, the heat generated by the heating device often enters the freezing space, causing the temperature in the freezing space to rise, which is not conducive to the storage of food; in addition, after defrosting the evaporator may It will cause condensation on the parts around the evaporator, and more seriously, it may freeze into ice on the above-mentioned parts, affecting the normal operation of the above-mentioned parts, and affecting the normal operation of the refrigerator, reducing the storage effect of food in the refrigerator, and affecting users. use experience.

Contents of the invention

One object of the present invention is to prevent condensation and ice formation on the branch air supply device of the refrigerator.

A further object of the present invention is to improve the working reliability of the branch air supply device and improve the overall cooling effect of the refrigerator.

In particular, the present invention provides a method for controlling defrosting of a refrigerator, wherein the refrigerator comprises: a box body defining a refrigerating space and a freezing space disposed below the refrigerating space; a door body arranged on the front side of the box body, For the user to open or close the refrigerated space and the refrigerated space; the refrigeration system includes a compressor and is configured to provide cooling capacity to the refrigerated space and the refrigerated space; the branch air supply device includes a fan and has a controlled communication with the refrigerated space The refrigerating air outlet of the refrigerating air outlet and the refrigerating air outlet in controlled communication with the refrigerating space, so as to send the cooling capacity provided by the refrigerating system into the refrigerating and/or freezing space in a controlled manner; The evaporator is heated for defrosting, and the defrosting control method of the refrigerator includes: obtaining a defrosting start signal of the refrigerator; Working in the working state corresponding to the signal; obtaining the defrosting end signal of the refrigerator;

Optionally, the working state corresponding to the defrosting start signal includes: turning off the compressor and the fan, turning on the heating device, and closing both the refrigerating air outlet and the freezing air outlet of the branch air supply device.

Optionally, the working state corresponding to the defrosting end signal includes: starting the compressor after acquiring the defrosting end signal for a first preset time period.

Optionally, after obtaining the defrosting end signal for a second preset time period, the fan is turned on, the refrigerating air outlet of the branch air supply device is opened, and the freezing air outlet is closed, wherein the second preset time length is longer than the first preset time length.

Optionally, the branch air supply device includes: a housing, which is provided with a refrigerating air outlet, a freezing air outlet, and at least one air inlet, so that the air flow enters the housing through at least one air inlet, and flows from the refrigerating air outlet and/or Or the freezing air outlet flows out of the casing; the adjusting member is configured to completely cover, partially cover or completely expose the refrigeration air outlet and the freezing air outlet in a controlled manner, so as to adjust the respective air outlet areas of the refrigeration air outlet and the freezing air outlet; and a motor configured to drive the adjustment member to rotate.

Optionally, after obtaining the defrosting end signal for a third preset duration, the motor-driven regulator of the branch air supply device is continuously operated for a fourth preset duration, wherein the third preset duration is longer than the second preset duration.

Optionally, the refrigerator further includes: a refrigerating damper configured to coordinate with the refrigerating air outlet to adjust the amount of cooling delivered to the refrigerating space.

Optionally, the working state corresponding to the defrosting start signal further includes: closing the refrigerating damper.

Optionally, after the defrosting end signal is acquired for a second preset time period, the refrigerating damper is opened.

According to another aspect of the present invention, there is also provided a refrigerator, which includes: a box body defining a refrigerating space and a freezing space below the refrigerating space; a door body set on the front side of the box body to For the user to open or close the refrigerated space and the refrigerated space; the refrigeration system includes a compressor and is configured to provide cooling capacity to the refrigerated space and the refrigerated space; the branch air supply device includes a fan and has a controllable communication with the refrigerated space The refrigerating air outlet and the refrigerating air outlet in controlled communication with the refrigerating space, so as to send the cooling provided by the refrigerating system into the refrigerating space and/or freezing space in a controlled manner; the heating device is configured to control the evaporator of the refrigerator Heating for defrosting; and a defrosting control device configured to acquire a defrosting start signal of the refrigerator; according to the defrosting starting signal, make the compressor, fan, heating device and branch air supply device work in accordance with the defrosting starting signal state work; obtain the defrosting end signal of the refrigerator; and make the compressor, fan, heating device and branch air supply device work according to the working state corresponding to the defrosting end signal according to the defrosting end signal.

The defrosting control method of the refrigerator and the refrigerator of the present invention obtain the defrosting start signal of the refrigerator; according to the defrosting starting signal, the compressor, the fan, the heating device and the branch air supply device are in the working state corresponding to the defrosting starting signal work; obtain the defrosting end signal of the refrigerator; and make the compressor, fan, heating device and branch air supply device work according to the working state corresponding to the defrosting end signal according to the defrosting end signal, which can prevent the evaporator from being damaged after defrosting. The surrounding components, such as the branch air supply device, will produce condensation, and further prevent the branch air supply device from freezing into ice, affecting its normal operation, ensuring the normal operation of the refrigerator, improving the storage effect of food in the refrigerator, and improving the user's safety. Use experience.

Further, in the defrosting control method of the refrigerator and the refrigerator according to the present invention, after the defrosting start signal is obtained, the compressor and the fan are turned off, the heating device is turned on, and both the refrigerating air outlet and the freezing air outlet of the branch air supply device are closed; After obtaining the defrosting end signal for the first preset time period, the compressor is turned on, and after the defrosting end signal is obtained for the second preset time period, the fan is turned on, the refrigerating air outlet of the branch air supply device is opened, and the freezing air outlet is closed , after obtaining the defrosting end signal for the third preset time period, make the motor-driven regulator of the branch air supply device run continuously for the fourth preset time period, so that the compressor, the fan, the heating device and the branch air supply device operate at different Timely perform different actions to prevent heat from entering the freezing space during defrosting and affect its internal temperature, and effectively prevent condensation or even freezing on the branch air supply device, which improves the reliability of the branch air supply device performance, thereby improving the overall cooling effect of the refrigerator.

According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the branch air supply device in the refrigerator of Fig. 1;

3 is a schematic diagram of a defrosting control method for a refrigerator according to an embodiment of the present invention; and

Fig. 4 is a detailed flowchart of a defrosting control method for a refrigerator according to an embodiment of the present invention.

detailed description

This embodiment firstly provides a refrigerator, which can prevent the heat from entering the freezing space during the defrosting process and affect the internal temperature, and effectively prevent the formation of condensation or even freezing into ice on the branch air supply device. The working reliability of the wind device. Fig. 1 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, which may generally include: a box body 10, a door body, a refrigeration system, a branch air supply device 20, a heating device and defrosting control device.

Wherein, a plurality of storage spaces may be defined inside the box body 10 . The number and structure of the storage space can be configured according to the requirements. Figure 1 shows the situation of the first space, the second space and the third space arranged in sequence up and down; the above storage spaces can be configured as refrigerated space, Freezing space, temperature-changing space or fresh-keeping space. The interior of each storage space can be divided into multiple storage areas by partition boards, using shelves or drawers to store items. The box body 10 of the refrigerator 100 of this embodiment defines a refrigerating space 11 and a freezing space arranged below the refrigerating space 11. The freezing space may include a first freezing space 12 and a second freezing space 13, that is, the refrigerator 100 of this embodiment A refrigerated space 11 , a first refrigerated space 12 and a second refrigerated space 13 are arranged in sequence from top to bottom.

The door body 20 is arranged on the front side of the box body 10 for the user to open or close the storage space of the refrigerator 100, wherein the storage space of the refrigerator 100 in this embodiment includes: a refrigerating space 11, a first freezing space 12 and a second The freezer space 13; the door body can be set corresponding to the storage space, that is, each storage space corresponds to one or more door bodies. And the quantity of storage space and door body, the function of storage space can be selected by actual situation. In some other embodiments, the door opening method of the storage space may also be opened in a drawer type, so as to realize a drawer type storage space.

The refrigeration system of the refrigerator 100 is configured to provide cooling to the storage space. The refrigeration system in this embodiment includes a compressor, and the compressor can be installed in the compressor chamber. Specifically, the refrigeration system may be a refrigeration cycle system composed of a compressor, a condenser, a throttling device, an evaporator, and the like. There may also be a cooling space inside the box body 10, and the evaporator of the refrigeration system may be arranged in the cooling space. As known by those skilled in the art, the refrigeration system can also be other types of refrigeration systems, such as a semiconductor refrigeration system, and a cold end radiator of the semiconductor refrigeration system can be arranged in the cooling space. The storage space of the refrigerator 100 of this embodiment includes from top to bottom: a refrigerated space 11, a first refrigerated space 12, and a second refrigerated space 13, and the refrigeration system provides different amounts of cold to the refrigerated space 11 and the refrigerated space, so that the refrigerated space 11 and the temperature in the frozen space are also different. The temperature in the refrigerated space 11 is generally between 2°C and 10°C, preferably between 3°C and 8°C. The temperature range in the refrigerated space is typically -22°C to -14°C. The optimal storage temperature for different types of food is not the same, and the suitable storage space for storage is also different. For example, fruits and vegetables are suitable for storage in the refrigerated space 11 , and meat food is suitable for storage in the freezing space.

2 is a schematic structural diagram of the branch air supply device 20 in the refrigerator 100 of FIG. shown in the figure). The housing 21 may have at least one air inlet 221 and a plurality of air outlets 22 , so that air flows into the housing 21 through the at least one air inlet 221 and flows out of the housing 21 through the plurality of air outlets 22 . The adjusting member can be configured to fully cover, partially cover or fully expose each air outlet 22 in a controlled manner, so as to adjust the respective air outlet areas of the plurality of air outlets 22 . The motor can be configured to drive the adjusting member to rotate, so that the adjusting member can fully cover, partially cover or fully expose each air outlet 22 at different positions. The adjusting part of the branch air supply device 20 in the embodiment of the present invention can controllably distribute the cold air flowing in from the air inlet 221 to a plurality of air outlets 22, and can realize the control of the air outlet duct communicating with each air outlet 22. Open and close and/or adjust the air volume in each air outlet duct to meet the cooling capacity requirements of different storage spaces.

The air outlet 22 of the branch air supply device 20 can be set correspondingly to the storage space, and the branch air supply device 20 of this embodiment can have three air outlets, and the three air outlets can be sequentially arranged along the circumferential direction of the housing 21 interval setting. The three air outlets 22 include a refrigerating air outlet 222 that is in controllable communication with the refrigerating space 11 , a first refrigerating air outlet 223 that is in controllable communication with the first refrigerating space 12 , and a controllably communicating with the second refrigerating space 13 . The second refrigerated air outlet 224 is connected to the refrigerated space 11 and/or the first refrigerated space 12 and/or the second refrigerated space 13 in a controlled manner with the cooling provided by the refrigerated system.

The fan 23 in the branch air supply device 20 of the present embodiment is configured to promote air flow into the casing 21 from at least one air inlet 221 and flow out of the casing 21 through one or more of the plurality of air outlets 22, so as to improve air supply s efficiency. The blower fan 23 can also allow the branch air supply device 20 in the embodiment of the present invention to take in air independently. Further, in some embodiments, the fan 23 can be a centrifugal impeller, which is arranged in the casing 21; The air inlet 221 of the casing 21 . Apparently, the blower 23 is a centrifugal impeller and is located in the casing 21, which can make the branch air supply device 20 compact in structure and small in volume.

The heating device can be configured to heat the evaporator of the refrigerator in a controlled manner to defrost, so as to prevent the refrigerating effect of the refrigeration system from being affected by an excessively thick frost layer on the surface of the evaporator. The defrosting control device can be configured to obtain the defrosting start signal of the refrigerator; according to the defrosting start signal, the compressor, the fan 23, the heating device and the branch air supply device 20 work according to the working state corresponding to the defrosting start signal; The defrosting end signal of the refrigerator; and according to the defrosting end signal, the compressor, fan 23, heating device and branch air supply device 20 are operated according to the working state corresponding to the defrosting end signal. The compressor, fan 23, heating device, and branch air supply device 20 are in different working states before and after defrosting, which can not only prevent the heat from entering the freezing space during defrosting and affect its internal temperature, but also effectively prevent branching. Condensation or even freezing into ice is formed on the air supply device 20, which improves the reliability of the branch air supply device 20, thereby improving the overall cooling effect of the refrigerator.

In some other embodiments, the refrigerator 100 may further include: a refrigerating damper, configured to coordinate with the refrigerating air outlet 222 to adjust the amount of cold delivered to the refrigerating space 11, the refrigerating damper (not shown in the figure) is arranged at the bottom of the refrigerating space 11, for To avoid the situation that the temperature of the refrigerated space 11 is too low due to air leakage when the refrigerated air outlet 222 is closed, the airtightness of the refrigerated air door can be further ensured, thereby controlling the temperature of the refrigerated space 11 more accurately.

Fig. 3 is a schematic diagram of a method for controlling defrosting of a refrigerator according to an embodiment of the present invention. The method for controlling defrosting of a refrigerator may be applicable to the refrigerator 100 in any of the foregoing embodiments. As shown in Figure 3, the defrosting control method of the refrigerator can perform the following steps:

Step S302, acquiring a defrosting start signal of the refrigerator;

Step S304, according to the defrosting start signal, make the compressor, fan 23, heating device and branch air supply device 20 work according to the working state corresponding to the defrosting start signal;

Step S306, acquiring the defrosting end signal of the refrigerator;

Step S308, according to the defrosting end signal, make the compressor, fan 23, heating device and branch air supply device 20 work according to the working state corresponding to the defrosting end signal.

In the above steps, the working state corresponding to the defrosting start signal in step S304 may include: turning off the compressor and the fan 23, turning on the heating device, and the refrigerating air outlet 222 and the freezing air outlet 223 of the branch air supply device 20, 224 are closed.

The working state corresponding to the defrosting end signal in step S308 may include: starting the compressor after acquiring the defrosting end signal for a first preset time period. After obtaining the second preset duration of the defrosting end signal, the fan 23 is turned on, the refrigerating air outlet 222 of the branch air supply device 20 is opened, and the freezing air outlets 223, 224 are closed, wherein the second preset duration is longer than the first preset duration. duration. After obtaining the defrosting end signal for a third preset duration, the motor-driven regulator of the branch air supply device 20 is continuously operated for a fourth preset duration, wherein the third preset duration is longer than the second preset duration. In a specific embodiment, the fourth preset duration of continuous operation of the motor-driven regulating member may be 2-3 minutes. It should be noted that the above specific value of the fourth preset duration is only an example, and in some other embodiments, the specific value of the fourth preset duration can also be other values, which can be set according to actual needs.

In the case that the refrigerator further includes a refrigerating damper, the working state corresponding to the defrosting start signal further includes: closing the refrigerating damper. After obtaining the defrosting end signal for a second preset period of time, the refrigerating air door is opened.

The defrosting control method of the refrigerator of the present embodiment obtains the defrosting start signal of the refrigerator; according to the defrosting starting signal, the compressor, fan 23, heating device and branch air supply device 20 are operated according to the corresponding defrosting signal. State work; obtain the defrosting end signal of the refrigerator; and make the compressor, fan 23, heating device and branch air supply device 20 work according to the working state corresponding to the defrosting end signal according to the defrosting end signal, which can prevent defrosting after defrosting. Condensation will be caused to the components around the evaporator, such as the branch air supply device 20, and further prevent the freezing of ice on the branch air supply device 20, which will affect its normal operation, ensure the normal operation of the refrigerator, and improve the storage of food in the refrigerator effect and improve user experience.

In some optional embodiments, the refrigerator 100 can achieve a higher technical effect through further optimization and configuration of the above steps. The following describes the defrosting control of the refrigerator in this embodiment in conjunction with an optional execution process of this embodiment. The method is described in detail. This embodiment is only an example of the execution process. During specific implementation, the execution sequence and operating conditions of some steps may be modified according to specific implementation requirements. Fig. 4 is a detailed flowchart of a defrosting control method for a refrigerator according to an embodiment of the present invention. The defrosting control method of the refrigerator comprises the following steps:

Step S402, acquiring a defrosting start signal of the refrigerator;

Step S404, closing the compressor, fan 23 and refrigerating damper, turning on the heating device, and closing the refrigerating air outlet 222 and the freezing air outlets 223 and 224 of the branch air supply device 20;

Step S406, acquiring the defrosting end signal of the refrigerator;

Step S408, after the defrosting end signal is acquired for a first preset time period, the compressor is turned on;

Step S410, after the defrosting end signal is acquired for a second preset time period, the fan 23 and the refrigerating damper are opened, the refrigerating air outlet 222 of the branch air supply device 20 is opened, and the refrigerating air outlets 223 and 224 are closed;

Step S412, after obtaining the defrosting end signal for a third preset duration, make the motor-driven regulator of the branch air supply device 20 run continuously for a fourth preset duration.

In the above steps, the third preset duration is longer than the second preset duration and is longer than the first preset duration, that is, after the defrosting end signal is acquired, step S408, step S410 and step S412 are executed in sequence.

In step S412, the motor-driven regulator of the branch air supply device 20 is continuously operated for a fourth preset time period, and the operation of the branch air supply device 20 itself can prevent condensation or even freezing into ice on the branch air supply device 20 . As a result, the regulator cannot normally adjust the opening and closing states of multiple air outlets, which affects the normal operation of the branch air supply device 20 .

It should be noted that, after step S412, the motor-driven regulator runs continuously for a fourth preset time period, the continuous running can be stopped, and the air outlet area of each air outlet can be adjusted according to the actual temperature of each storage space to perform normal cooling control.

The defrosting control method of the refrigerator of the present embodiment obtains the defrosting start signal of the refrigerator; according to the defrosting starting signal, the compressor, fan 23, heating device and branch air supply device 20 are operated according to the corresponding defrosting signal. State work; obtain the defrosting end signal of the refrigerator; and make the compressor, fan 23, heating device and branch air supply device 20 work according to the working state corresponding to the defrosting end signal according to the defrosting end signal, which can prevent defrosting after defrosting. Condensation will be caused to the components around the evaporator, such as the branch air supply device 20, and further prevent the freezing of ice on the branch air supply device 20, which will affect its normal operation, ensure the normal operation of the refrigerator, and improve the storage of food in the refrigerator effect and improve user experience.

Further, in the defrosting control method of the refrigerator in this embodiment, after the defrosting start signal is obtained, the compressor and the blower 23 are turned off, the heating device is turned on, and the refrigerating air outlet 222 and the freezing air outlet 223 of the air supply device 20 are divided. , 224 are all closed; after obtaining the defrosting end signal for the first preset time length, the compressor is turned on, and after the defrosting end signal is obtained for the second preset time length, the fan 23 is turned on, and the refrigerating output of the branch air supply device 20 is turned on. The tuyere 222 is opened, and the freezing air outlets 223, 224 are closed. After obtaining the defrosting end signal for the third preset duration, the motor-driven regulator of the branch air supply device 20 is continuously operated for the fourth preset duration, so that the compressor, fan 23. The heating device and the branch air supply device 20 perform different actions at different times, avoiding the heat in the defrosting process entering the freezing space and affecting the internal temperature, and effectively preventing the formation of condensation on the branch air supply device 20 It even freezes into ice, which improves the working reliability of the branch air supply device 20, thereby improving the overall cooling effect of the refrigerator.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A defrosting control method for a refrigerator, wherein the refrigerator comprises: a box body, which defines a refrigerated space and a freezing space arranged below the refrigerated space; a door body, which is arranged on the front side of the box body , for the user to open or close the refrigerated space and the refrigerated space; the refrigerating system includes a compressor and is configured to provide cooling capacity to the refrigerated space and the refrigerated space; the branch air supply device includes The fan has a refrigerating air outlet in controlled communication with the refrigerating space and a refrigerating air outlet in controlled communication with the refrigerating space, so as to controlly send the cooling capacity provided by the refrigerating system into the refrigerating space and/or the freezing space; and a heating device configured to controllably heat an evaporator of the refrigerator for defrosting, and the method includes: Obtain a defrosting start signal of the refrigerator; According to the defrosting start signal, the compressor, the fan, the heating device, and the branch air supply device are operated according to the working state corresponding to the defrosting start signal; Acquiring a defrosting end signal of the refrigerator; and According to the defrosting end signal, the compressor, the blower fan, the heating device and the branch air supply device are operated according to the working state corresponding to the defrosting end signal. 2. The defrosting control method of the refrigerator according to claim 1, wherein the working state corresponding to the defrosting start signal comprises: The compressor and the fan are turned off, the heating device is turned on, and the refrigerating air outlet and the freezing air outlet of the branch air supply device are both closed. 3. The defrosting control method of the refrigerator according to claim 2, wherein the working state corresponding to the defrosting end signal includes: After obtaining the defrosting end signal for a first preset time period, the compressor is turned on. 4. The defrosting control method of the refrigerator according to claim 3, wherein, After obtaining the defrosting end signal for a second preset time period, the fan is turned on, the refrigerating air outlet of the branch air supply device is opened, and the freezing air outlet is closed, wherein the second preset The duration is longer than the first preset duration. 5. The defrosting control method of the refrigerator according to claim 4, wherein the branch air supply device comprises: The casing is provided with the refrigerating air outlet, the freezing air outlet, and at least one air inlet, so that air flows into the casing through at least one air inlet, and flows out from the refrigerating air outlet and/or the freezing outlet. the tuyeres flow out of the housing; The adjusting member is configured to completely cover, partially cover or fully expose the refrigerating air outlet and the freezing air outlet in a controlled manner, so as to adjust the respective air outlet areas of the refrigerating air outlet and the freezing air outlet; as well as The motor is configured to drive the adjustment member to rotate. 6. The defrosting control method of the refrigerator according to claim 5, wherein, After obtaining the defrosting end signal for a third preset duration, the motor of the branch air supply device drives the regulator to run continuously for a fourth preset duration, wherein the third preset duration is longer than the preset duration Describe the second preset duration. 7. The defrosting control method of the refrigerator according to claim 6, wherein the refrigerator further comprises: The refrigerating damper is configured to cooperate with the refrigerating air outlet to adjust the cooling capacity delivered to the refrigerating space. 8. The defrosting control method of a refrigerator according to claim 7, wherein the working state corresponding to the defrosting start signal further comprises: Close the refrigerating damper. 9. The defrosting control method of the refrigerator according to claim 8, wherein, After obtaining the defrosting end signal for a second preset period of time, the refrigerating damper is opened. 10. A refrigerator comprising: The box body defines a refrigerated space and a refrigerated space below the refrigerated space; a door, arranged on the front side of the box, for users to open or close the refrigerating space and the freezing space; a refrigeration system including a compressor and configured to provide refrigeration to the refrigerated space and the frozen space; The branch air supply device includes a fan, and has a refrigerating air outlet that is in control communication with the refrigerating space and a refrigerating air outlet that is in control communication with the refrigerating space, so that the cooling provided by the refrigerating system A controlled amount is sent into the refrigerated space and/or the frozen space; a heating device configured to controllably heat an evaporator of the refrigerator for defrosting; and The defrosting control device is configured to obtain a defrosting start signal of the refrigerator; according to the defrosting starting signal, make the compressor, the fan, the heating device and the branch air supply device follow the The working state corresponding to the defrosting start signal is working; the defrosting end signal of the refrigerator is obtained; and the compressor, the fan, the heating device and the branch air supply device are activated according to the defrosting end signal Work according to the working state corresponding to the defrosting end signal.