CN108020000B

CN108020000B - Defrosting control method of refrigerator and refrigerator

Info

Publication number: CN108020000B
Application number: CN201710823862.8A
Authority: CN
Inventors: 李春阳; 陶海波; 李登强; 吴淑娟
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2017-09-13
Filing date: 2017-09-13
Publication date: 2020-03-31
Anticipated expiration: 2037-09-13
Also published as: WO2019052512A1; CN108020000A

Abstract

The invention provides a defrosting control method of a refrigerator and the refrigerator. The defrosting control method of the refrigerator comprises the following steps: acquiring a defrosting start signal of the refrigerator; enabling the compressor, the fan, the heating device and the shunt air supply device to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device; and when the temperature of the branch air supply device is lower than a first preset temperature, the branch air supply device is continuously operated, and when the temperature of the branch air supply device is lower than a second preset temperature, the branch air supply device stops continuously operating. According to the scheme provided by the invention, whether the demand of condensation prevention or icing prevention exists at the position is determined through the temperature of the branch air supply device, so that the branch air supply device can be effectively prevented from generating condensation or even freezing into ice, the working reliability of the branch air supply device is improved, and the integral refrigeration effect of the refrigerator is improved.

Description

Defrosting control method of refrigerator and refrigerator

Technical Field

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

Background

With the increasing development of society and the increasing living standard of people, the rhythm of life of people is faster and faster, so that people are willing to buy a lot of food to place in a refrigerator, and the refrigerator becomes one of the indispensable household appliances in daily life of people.

However, the existing air-cooled refrigerator has the following disadvantages: in the defrosting process, heat generated by the heating device often enters the freezing space, so that the temperature of the freezing space is increased, and the storage of food is not facilitated; in addition, after defrosting the evaporator, condensation may be generated on components around the evaporator, and more seriously, the components may be frozen into ice, which affects normal operation of the components, affects normal operation of the refrigerator, reduces storage effect of food in the refrigerator, and affects use experience of a user.

Disclosure of Invention

An object of the present invention is to prevent dew from freezing on a branching air supply device of a refrigerator.

A further object of the present invention is to improve the operational reliability of the split air supply device and to improve the overall refrigeration effect of the refrigerator.

Particularly, the present invention provides a defrosting control method of a refrigerator, wherein the refrigerator includes: a box body, wherein a refrigerating space and a freezing space arranged below the refrigerating space are limited in the box body; the door body is arranged on the front side of the box body and is used for opening or closing the refrigerating space and the freezing space by a user; a refrigeration system including a compressor and configured to provide refrigeration to the refrigerated space and the refrigerated space; the branch air supply device comprises a fan and is provided with a refrigerating air outlet which is in controlled communication with the refrigerating space and a freezing air outlet which is in controlled communication with the freezing space so as to send the cold energy provided by the refrigerating system into the refrigerating space and/or the freezing space in a controlled manner; a heating device configured to controllably heat an evaporator of the refrigerator for defrosting; and a temperature sensor configured to acquire a temperature at the branched air supply device, and the defrosting control method of the refrigerator includes: acquiring a defrosting start signal of the refrigerator; enabling the compressor, the fan, the heating device and the shunt air supply device to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device; and when the temperature of the branch air supply device is lower than a first preset temperature, continuously operating the branch air supply device, and when the temperature of the branch air supply device is lower than a second preset temperature, stopping continuously operating the branch air supply device, wherein the second preset temperature is lower than the first preset temperature.

Optionally, the operation state corresponding to the defrosting start signal includes: the compressor and the fan are closed, the heating device is opened, and the refrigerating air outlet and the freezing air outlet of the shunt air supply device are both closed.

Optionally, after acquiring the defrosting end signal for a first preset time period, the compressor is started.

Optionally, after a second preset duration of the defrosting end signal is obtained, the fan is turned on, the refrigerating air outlet of the shunt air supply device is turned on, and the freezing air outlet is turned off, wherein the second preset duration is longer than the first preset duration.

Optionally, the split air supply device comprises: the refrigerator comprises a shell, a refrigerating air outlet, a freezing air outlet and at least one air inlet, wherein the shell is provided with the refrigerating air outlet, the freezing air outlet and the at least one air inlet, so that air flow enters the shell through the at least one air inlet and flows out of the shell from the refrigerating air outlet and/or the freezing air outlet; the adjusting piece is configured to be controlled to completely shield, partially shield or completely expose the refrigerating air outlet and the freezing air outlet so as to adjust the air outlet areas of the refrigerating air outlet and the freezing air outlet respectively; and the motor is configured to drive the adjusting piece to operate.

Optionally, the step of continuously operating the split air supply device comprises: the motor of the shunt air supply device drives the adjusting piece to continuously operate.

Optionally, the refrigerator further comprises: and the refrigerating air door is configured to be matched with the refrigerating air outlet to adjust the cold quantity conveyed to the refrigerating space.

Optionally, the operating state corresponding to the defrosting start signal further includes: the refrigeration damper is closed.

Optionally, after acquiring the defrosting end signal for a second preset time period, the refrigerating air door is opened.

According to another aspect of the present invention, there is also provided a refrigerator including: a box body, wherein a refrigerating space and a freezing space arranged below the refrigerating space are limited in the box body; the door body is arranged on the front side of the box body and is used for opening or closing the refrigerating space and the freezing space by a user; a refrigeration system including a compressor and configured to provide refrigeration to the refrigerated space and the refrigerated space; the branch air supply device comprises a fan and is provided with a refrigerating air outlet which is in controlled communication with the refrigerating space and a freezing air outlet which is in controlled communication with the freezing space so as to send the cold energy provided by the refrigerating system into the refrigerating space and/or the freezing space in a controlled manner; a heating device configured to controllably heat an evaporator of the refrigerator for defrosting; a temperature sensor configured to acquire a temperature at the split air supply device; and a defrosting control device configured to acquire a defrosting start signal of the refrigerator; enabling the compressor, the fan, the heating device and the shunt air supply device to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device; and when the temperature of the branch air supply device is lower than a first preset temperature, continuously operating the branch air supply device, and when the temperature of the branch air supply device is lower than a second preset temperature, stopping continuously operating the branch air supply device, wherein the second preset temperature is lower than the first preset temperature.

According to the defrosting control method of the refrigerator and the refrigerator, the defrosting starting signal of the refrigerator is obtained; enabling the compressor, the fan, the heating device and the shunt air supply device to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device; and when the temperature of the branch air supply device is lower than a first preset temperature, the branch air supply device is continuously operated, and when the temperature of the branch air supply device is lower than a second preset temperature, the branch air supply device stops continuously operating, wherein the second preset temperature is lower than the first preset temperature, whether the temperature of the branch air supply device meets the requirement of condensation prevention or icing prevention is determined through the temperature of the branch air supply device, so that the branch air supply device can be effectively prevented from generating condensation, and further the branch air supply device is prevented from being frozen into ice to influence the normal operation of the branch air supply device, the normal operation of the refrigerator is ensured, the storage effect of food in the refrigerator is improved, and the use experience of a user is improved.

Further, according to the defrosting control method of the refrigerator and the refrigerator, the compressor and the fan are closed after the defrosting start signal is obtained, the heating device is started, and the refrigerating air outlet and the freezing air outlet of the shunt air supply device are both closed; after the first preset duration of defrosting end signal is obtained, make the compressor open, after obtaining defrosting end signal second preset duration, make the fan open, the cold-stored air outlet of along separate routes air supply arrangement is opened, the refrigeration air outlet is closed, make the compressor, the fan, heating device and along separate routes air supply arrangement carry out different actions at different times, avoid the heat of defrosting in-process to get into the refrigerated space and influence its inside temperature, whether continuous operation is confirmed according to the different temperature condition of along separate routes air supply arrangement department, thereby effectively prevent to form the condensation on the air supply arrangement along separate routes and freeze into ice even, the operational reliability of air supply arrangement along separate routes has been improved, thereby promote the whole refrigeration effect of refrigerator.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a refrigerator according to one embodiment of the present invention;

FIG. 2 is a schematic block diagram of the bypass blower of the refrigerator of FIG. 1;

fig. 3 is a schematic view of a defrosting control method of a refrigerator according to one embodiment of the present invention; and

fig. 4 is a detailed flowchart of a defrosting control method of a refrigerator according to one embodiment of the present invention.

Detailed Description

The embodiment firstly provides the refrigerator, so that the heat in the defrosting process can be prevented from entering the freezing space to influence the temperature in the refrigerator, condensation and even freezing into ice on the shunting air supply device can be effectively prevented, and the working reliability of the shunting air supply device is improved. Fig. 1 is a schematic structural view of a refrigerator 100 according to one embodiment of the present invention, the refrigerator 100 may generally include: the refrigerator comprises a box body 10, a door body, a refrigerating system, a branch air supply device 20, a heating device, a temperature sensor and a defrosting control device.

Wherein a plurality of storage spaces may be defined inside the case 10. The number and structure of the storage spaces can be configured as required, and fig. 1 shows the case of a first space, a second space and a third space which are arranged in sequence from top to bottom; the storage space can be respectively configured into a refrigerating space, a freezing space, a temperature changing space or a fresh-keeping space according to different purposes. The interior of each storage space can be divided into a plurality of storage areas by the partition board, and the articles are stored by the racks or the drawers. The refrigerator 100 of the present embodiment defines a refrigerating space 11 and a freezing space disposed below the refrigerating space 11 in the refrigerator body 10, and the freezing space may include a first freezing space 12 and a second freezing space 13, that is, the refrigerator 100 of the present embodiment is sequentially provided with the refrigerating space 11, the first freezing space 12 and the second freezing space 13 from top to bottom.

The door 20 is disposed at a front side of the cabinet 10 for a user to open or close a storage space of the refrigerator 100, wherein the storage space of the refrigerator 100 of the embodiment includes: a refrigerated space 11, a first freezer space 12 and a second freezer space 13; the door bodies can be arranged corresponding to the storage spaces, namely, each storage space corresponds to one or more door bodies. The number of the storage spaces and the door bodies and the functions of the storage spaces can be actually selected according to specific conditions. In other embodiments, the storage space may be opened in a drawer-type manner to realize a drawer-type storage space.

The refrigeration system of the refrigerator 100 is configured to provide cooling energy to the storage space. The refrigeration system of this embodiment includes a compressor, which may be mounted within a compressor compartment. Specifically, the refrigeration system may be a refrigeration cycle system constituted by a compressor, a condenser, a throttle device, an evaporator, and the like. The cabinet 10 may further have a cooling space therein, and an evaporator of the refrigeration system may be disposed in the cooling space. As is well known to those skilled in the art, the refrigeration system may be other types of refrigeration systems, such as a semiconductor refrigeration system, and a cold-side cold spreader of the semiconductor refrigeration system may be disposed in the cooling space. The storage space of the refrigerator 100 of the present embodiment includes from top to bottom: the refrigerating space 11, the first freezing space 12 and the second freezing space 13, the refrigerating system providing different amounts of cold to the refrigerating space 11 and the freezing space, so that the temperatures in the refrigerating space 11 and the freezing space are different. Wherein the temperature in the refrigerated space 11 is typically between 2 ℃ and 10 ℃, preferably between 3 ℃ and 8 ℃. The temperature in the refrigerated space is typically in the range of-22 ℃ to-14 ℃. The optimal storage temperatures of different kinds of food are different, and thus the storage spaces suitable for storage are also different. For example, fruit and vegetable foods are suitably stored in the refrigerating space 11, and meat foods are suitably stored in the freezing space.

Fig. 2 is a schematic structural view of the branched air supply device 20 in the refrigerator 100 of fig. 1, and the branched air supply device 20 may generally include a housing 21, an adjustment member, and a motor (not shown in the drawing because it is disposed inside the housing 21). The housing 21 may have at least one inlet 221 and a plurality of outlets 22, such that the airflow enters the housing 21 through the at least one inlet 221 and exits the housing 21 through the plurality of outlets 22. The adjusting member may be configured to controllably fully shield, partially shield or fully expose each air outlet 22 to adjust the air outlet area of each of the air outlets 22. The motor may be configured to drive the adjustment member to operate such that the adjustment member may fully shield, partially shield, or fully expose each outlet vent 22 at different locations. The regulating part of the branching air supply device 20 in the embodiment of the invention can controllably distribute the cold air flowing from the air inlet 221 to the air outlets 22, and can control the opening and closing of the air outlet duct communicated with each air outlet 22 and/or regulate the air outlet volume in each air outlet duct, thereby meeting the cold quantity requirements of different storage spaces.

The air outlet 22 of the branching air supply device 20 may be disposed corresponding to the storage space, and the branching air supply device 20 of this embodiment may have three air outlets, and the three air outlets may be sequentially disposed at intervals along the circumferential direction of the housing 21. The three air outlets 22 comprise an air outlet with a refrigerated air outlet 222 in controlled communication with the refrigerated space 11, a first freezer air outlet 223 in controlled communication with the first freezer space 12 and a second freezer air outlet 224 in controlled communication with the second freezer space 13 for controlled delivery of the cooling energy provided by the refrigeration system into the refrigerated space 11 and/or the first freezer space 12 and/or the second freezer space 13.

The blower 23 in the branched air supply device 20 of the present embodiment is configured to promote airflow flowing into the housing 21 from at least one air inlet 221 and flowing out of the housing 21 through one or more of the plurality of air outlets 22, so as to improve the efficiency of air supply. The fan 23 can also independently supply air to the branched air supply device 20 in the embodiment of the invention. Further, in some embodiments, the fan 23 may be a centrifugal impeller disposed within the housing 21; in some alternative embodiments, the fan 23 may also be an axial flow fan, an axial flow fan drum or a centrifugal fan, and is disposed at the air inlet 221 of the housing 21. Obviously, the fan 23 is a centrifugal impeller and is located in the casing 21, so that the structure of the branched air supply device 20 can be compact and small.

The heating device can be configured to controllably heat the evaporator of the refrigerator for defrosting, so as to avoid the phenomenon that the frost layer on the surface of the evaporator is too thick to affect the refrigerating effect of the refrigerating system. A temperature sensor may be configured to acquire the temperature at the split air supply device 20. It should be noted that the temperature sensor may be directly disposed at the branch air supply device 20, and directly detect the temperature at the branch air supply device 20; the temperature sensor disposed at the evaporator may be used to indirectly estimate the temperature at the branched air supply device 20 by detecting the temperature at the evaporator.

A defrosting control device configured to acquire a defrosting start signal of the refrigerator; enabling the compressor, the fan 23, the heating device and the shunt air supply device 20 to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device 20; and when the temperature of the branch air supply device 20 is lower than a first preset temperature, continuously operating the branch air supply device 20, and when the temperature of the branch air supply device 20 is lower than a second preset temperature, stopping the continuous operation of the branch air supply device 20, wherein the second preset temperature is lower than the first preset temperature. Make compressor, fan 23, heating device and along separate routes air supply arrangement 20 be in different operating condition around changing the frost, not only can avoid changing the heat of frost in-process and get into frozen space and influence its inside temperature, and prevent effectively that form the condensation on along separate routes air supply arrangement 20 and freeze into ice even, can accurately know whether there is the demand of anti-condensation or anti-icing in this department through the temperature of along separate routes air supply arrangement 20 department, the operational reliability of air supply arrangement 20 along separate routes has been improved, thereby promote the whole refrigeration effect of refrigerator.

In some other embodiments, the refrigerator 100 may further include: cold-stored air door, the cold volume of being configured to the cooperation cold-stored air outlet 222 and adjusting to refrigerating space 11 transport, cold-stored air door (not shown in the figure) sets up in refrigerating space 11 bottom, in order to avoid the condition that the cold-stored air outlet 222 closed because the air leakage leads to refrigerating space 11 low temperature excessively, can further guarantee the leakproofness through cold-stored air door, and then more accurate to the control of refrigerating space 11 temperature.

Fig. 3 is a schematic view of a defrosting control method of a refrigerator according to one embodiment of the present invention. The defrosting control method of the refrigerator may be applied to the refrigerator 100 of any of the above embodiments. As shown in fig. 3, the defrosting control method of the refrigerator may perform the following steps:

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

step S304, enabling the compressor, the fan 23, the heating device and the shunt air supply device 20 to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal;

step S306, acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device 20;

step S308 is to continuously operate the branch air supply device 20 when the temperature of the branch air supply device 20 is lower than the first preset temperature, and to stop the continuous operation of the branch air supply device 20 when the temperature of the branch air supply device 20 is lower than the second preset temperature.

In the above step, the operation state corresponding to the defrosting start signal in step S304 may include: the compressor and fan 23 are turned off, the heating device is turned on, and both the cold storage air outlet 222 and the freezing

air outlets

223, 224 of the branched air supply device 20 are turned off.

In step S306, the temperature of the branched air supply device 20 may be obtained by a temperature sensor, where the temperature sensor may be directly disposed at the branched air supply device 20 to directly detect the temperature at the branched air supply device 20; the temperature sensor disposed at the evaporator may be used to indirectly estimate the temperature at the branched air supply device 20 by detecting the temperature at the evaporator. The second preset temperature in step S308 is lower than the first preset temperature, i.e. the temperature of the branched air supply device 20 gradually decreases with the continuous operation thereof. The step of continuously operating the branching blower device 20 includes: the motor-driven adjusting member of the branching air supply device 20 is continuously operated.

In a specific embodiment, after acquiring the defrosting end signal in step S306 for the first preset time period, the compressor is turned on. After a second preset time length of the defrosting end signal is obtained, the fan 23 is turned on, the refrigerating air outlet 222 of the shunt air supply device 20 is turned on, and the freezing

air outlets

223 and 224 are turned off, wherein the second preset time length is longer than the first preset time length. Then, a determination may be made as to whether the temperature at the branched air blowing devices 20 is less than the first preset temperature in step S308.

In the case that the refrigerator further includes a refrigerating damper, the operation state corresponding to the defrosting start signal further includes: the refrigeration damper is closed. And after acquiring a defrosting end signal for a second preset time, opening the refrigerating air door.

According to the defrosting control method of the refrigerator, a defrosting start signal of the refrigerator is acquired; enabling the compressor, the fan 23, the heating device and the shunt air supply device 20 to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device 20; and when the temperature of the branch air supply device 20 is lower than the first preset temperature, the branch air supply device 20 continuously operates, and when the temperature of the branch air supply device 20 is lower than the second preset temperature, the branch air supply device 20 stops continuously operating, wherein the second preset temperature is lower than the first preset temperature, whether the temperature of the branch air supply device 20 meets the requirement of condensation prevention or icing prevention is determined, so that the branch air supply device 20 can be effectively prevented from generating condensation, and further the branch air supply device 20 is prevented from being frozen into ice to influence the normal operation of the branch air supply device, the normal operation of the refrigerator is ensured, the storage effect of food in the refrigerator is improved, and the use experience of a user is improved.

In some optional embodiments, the refrigerator 100 may achieve a higher technical effect by further optimizing and configuring the above steps, and the following describes in detail the defrosting control method of the refrigerator according to this embodiment in conjunction with a description of an optional execution flow of this embodiment, where this embodiment is merely an illustration of the execution flow, and in a specific implementation, an execution sequence and an operation condition of some steps may be modified according to specific implementation requirements. Fig. 4 is a detailed flowchart of a defrosting control method of a refrigerator according to one 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, the fan 23 and the refrigeration air door, opening the heating device, and closing the refrigeration air outlet 222 and the freezing

air outlets

223 and 224 of the shunt air supply device 20;

step S406, acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device 20;

step S408, after acquiring a first preset time length of a defrosting end signal, starting a compressor;

step S410, after a defrosting end signal is acquired for a second preset time, the fan 23 and the refrigeration air door are opened, the refrigeration air outlet 222 of the shunt air supply device 20 is opened, and the freezing

air outlets

223 and 224 are closed;

step S412, determining whether the temperature at the branch air supply device 20 is lower than a first preset temperature, if so, performing step S414, and if not, performing step S410;

step S414, making the motor of the branch air supply device 20 drive the adjusting piece to continuously operate;

step S416, determining whether the temperature at the branch air supply device 20 is lower than a second preset temperature, if so, performing step S418, and if not, performing step S414;

in step S418, the motor of the branching blower device 20 is stopped from driving the regulator continuously.

The second preset time duration in the above steps is longer than the first preset time duration, that is, after the defrosting end signal is acquired, step S408 and step S410 are executed according to the sequence. The second preset temperature in step S416 is lower than the first preset temperature in step S412, i.e., the temperature of the branched air supply device 20 gradually decreases with the continuous operation thereof.

In step S414, the motor of the branched air supply device 20 is driven to continuously operate, so that the branched air supply device 20 can be prevented from forming condensation or even freezing into ice by the operation of the branched air supply device 20, and the adjustment member cannot normally adjust the open/close states of the air outlets, thereby affecting the normal operation of the branched air supply device 20.

It should be noted that, after the motor stops driving the adjusting member to continuously operate in step S418, the air outlet area of each air outlet may be adjusted according to the actual temperature of each storage space, so as to perform normal refrigeration control.

Further, in the defrosting control method of the refrigerator of the embodiment, after the defrosting start signal is obtained, the compressor and the fan 23 are turned off, the heating device is turned on, and the refrigerating air outlet 222 and the freezing

air outlets

223 and 224 of the branching air supply device 20 are both turned off; after the first preset duration of the defrosting end signal is acquired, the compressor is started, after the second preset duration of the defrosting end signal is acquired, the fan 23 is started, the refrigerating air outlet 222 of the shunt air supply device 20 is started, and the freezing

air outlets

223 and 224 are closed, so that the compressor, the fan 23, the heating device and the shunt air supply device 20 execute different actions at different times, heat in the defrosting process is prevented from entering a freezing space to influence the temperature inside the freezing space, whether continuous operation is performed or not is determined according to different temperature conditions at the shunt air supply device 20, condensation and even freezing into ice are effectively prevented from being formed on the shunt air supply device 20, the working reliability of the shunt air supply device 20 is improved, and the overall refrigerating effect of the refrigerator is improved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A defrosting control method of a refrigerator, wherein the refrigerator includes: a cabinet defining therein a refrigerating space and a freezing space disposed below the refrigerating space; the door body is arranged on the front side of the box body and is used for opening or closing the refrigerating space and the freezing space by a user; a refrigeration system including a compressor and configured to provide refrigeration to the refrigerated space and the refrigerated space; the branch air supply device comprises a fan and is provided with a refrigerating air outlet communicated with the refrigerating space in a controlled manner and a freezing air outlet communicated with the freezing space in a controlled manner, so that the cold energy provided by the refrigerating system is sent into the refrigerating space and/or the freezing space in a controlled manner; a heating device configured to controllably heat an evaporator of the refrigerator for defrosting; and a temperature sensor configured to acquire a temperature at the split air supply arrangement, and the method comprises:

acquiring a defrosting start signal of the refrigerator;

enabling the compressor, the fan, the heating device and the shunt air supply device to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal;

acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device; and

when the temperature of the branch air supply device is lower than a first preset temperature, the branch air supply device is continuously operated, and when the temperature of the branch air supply device is lower than a second preset temperature, the branch air supply device stops continuously operating, wherein the second preset temperature is lower than the first preset temperature,

wherein the branch air supply device comprises: the refrigerating air outlet, the freezing air outlet and at least one air inlet are formed in the shell, so that air flow enters the shell through the at least one air inlet and flows out of the shell from the refrigerating air outlet and/or the freezing air outlet; a regulating member configured to controllably fully shield, partially shield or fully expose the refrigerating air outlet and the freezing air outlet so as to adjust respective air outlet areas of the refrigerating air outlet and the freezing air outlet; and a motor configured to drive the adjusting member to operate,

the step of continuously operating the branched blowing device includes: the motor of the branch air supply device drives the adjusting piece to continuously operate.

2. The defrosting control method of a refrigerator according to claim 1, wherein the operation state corresponding to the defrosting start signal includes:

and closing the compressor and the fan, opening the heating device, and closing the refrigerating air outlet and the freezing air outlet of the branch air supply device.

3. The defrosting control method of a refrigerator according to claim 2, wherein,

and after the first preset time length of the defrosting end signal is acquired, starting the compressor.

4. The defrosting control method of a refrigerator according to claim 3, wherein,

after the defrosting end signal is acquired for a second preset time, the fan is started, the refrigerating air outlet of the branch air supply device is started, the freezing air outlet is closed, and the second preset time is longer than the first preset time.

5. The defrosting control method of a refrigerator according to claim 4, wherein the refrigerator further comprises:

and the refrigerating air door is configured to be matched with the refrigerating air outlet to adjust the cold quantity conveyed to the refrigerating space.

6. The defrosting control method of a refrigerator of claim 5, wherein the operation state corresponding to the defrosting start signal further comprises:

the refrigeration damper is closed.

7. The defrosting control method of a refrigerator according to claim 6, wherein,

and after a second preset time length of a defrosting end signal is acquired, the refrigerating air door is opened.

8. A refrigerator, comprising:

a cabinet defining therein a refrigerating space and a freezing space disposed below the refrigerating space;

the door body is arranged on the front side of the box body and is used for opening or closing the refrigerating space and the freezing space by a user;

a refrigeration system including a compressor and configured to provide refrigeration to the refrigerated space and the refrigerated space;

the branch air supply device comprises a fan and is provided with a refrigerating air outlet communicated with the refrigerating space in a controlled manner and a freezing air outlet communicated with the freezing space in a controlled manner, so that the cold energy provided by the refrigerating system is sent into the refrigerating space and/or the freezing space in a controlled manner;

a heating device configured to controllably heat an evaporator of the refrigerator for defrosting;

a temperature sensor configured to acquire a temperature at the split air supply device; and

a defrosting control device configured to acquire a defrosting start signal of the refrigerator; enabling the compressor, the fan, the heating device and the shunt air supply device to work according to the working state corresponding to the defrosting starting signal according to the defrosting starting signal; acquiring a defrosting end signal of the refrigerator and the temperature of the branch air supply device; and when the temperature of the branch air supply device is lower than a first preset temperature, the branch air supply device is continuously operated, and when the temperature of the branch air supply device is lower than a second preset temperature, the branch air supply device stops continuously operating, wherein the second preset temperature is lower than the first preset temperature,