CN117804139A - Refrigerator and control method - Google Patents

Abstract

The application provides a refrigerator and a control method, wherein the refrigerator comprises a freezing chamber, a freezing air duct, a first freezing space, a second freezing space, an electric air door, a first temperature sensing bag, a second temperature sensing bag, an auxiliary fan, a refrigerating fan and a controller; the controller is configured to: acquiring the temperature of a first freezing space detected by a first temperature sensing bulb and the temperature of a second freezing space detected by a second temperature sensing bulb; if the temperature of the first refrigerating space is within the preset range, a first instruction is sent to control the auxiliary fan to be started, the electric air door is started, and the rotating speed of the refrigerating fan is the highest rotating speed; if the second freezing space temperature is within the preset range and the first freezing space temperature is not within the preset range, a second instruction is sent to control the closing of the electric air door and the closing of the auxiliary fan, and the rotating speed of the refrigerating fan is the highest rotating speed. The cold quantity distribution of the first refrigerating space is realized by detecting the temperatures of the first refrigerating space and the second refrigerating space, so that the problem of poor fresh-keeping effect of the refrigerator is solved.

Description

Refrigerator and control method

Technical Field

The application relates to the technical field of household refrigeration equipment, in particular to a refrigerator and a control method.

Background

The cooling speed, energy saving and fresh keeping effects of the refrigerator are important indexes for consumers to measure the quality of the refrigerator. The method for simultaneously realizing the three effects can control the operation of the refrigerator by adopting a frequency conversion technology, and comprises the following steps: an indoor temperature sensor is arranged on the indoor side wall of the refrigerator or an air duct cover plate, an annular temperature sensor is arranged on the outer surface of the refrigerator, the higher the outdoor environment temperature is, the higher the indoor and outdoor temperature difference is, the higher the rotating speed of the press is during operation, the lower the annular temperature is, the smaller the indoor and outdoor temperature difference is, and the operating rotating speed of the press is low; the gear of the freezing chamber is high, the running rotating speed of the press is low, the gear of the freezing chamber is low, and the running rotating speed of the press is high. Such control is not accurate enough and the sensors in the refrigerator compartment, particularly the freezing temperature sensors, typically NTC temperature probes, are placed inside the compartment due to process problems requiring connection to the compartment through the compartment leads. Insensitive to the just-placed food, and the like, the temperature change is perceived, and the food has missed the optimal cooling time. Or the temperature sensing probe is sensitive, so that the refrigerator is frequently started and stopped, the stop time is prolonged, the indoor temperature difference is large, and the temperature fluctuation of the defrosting freezing chamber of the frostless refrigerator is large, so that the food material preservation is not facilitated.

The fresh-keeping refrigerator for meat has a quick-freezing function, and the quick-freezing function is utilized to improve the rotating speed of a fan and the rotating speed of a compressor to realize the quick refrigeration of the whole freezing chamber through the setting of a user. The refrigerator quick-freezing time is long, accurate and rapid refrigeration of foods cannot be well achieved, and the power consumption of the refrigerator quick-freezing time is large when the whole space is rapidly refrigerated, so that the use experience of a refrigerator quick-freezing function is poor, and the fresh-keeping effect cannot be achieved. In addition, the electric heating mode is adopted for defrosting regularly, hot gas in the heating process rises, so that the temperature of the upper part of the freezing chamber rises more, frozen food can be repeatedly thawed and frozen, and the preservation effect of the frozen food storage is further deteriorated.

Disclosure of Invention

The application provides a refrigerator and a control method, which are used for solving the problem of poor fresh-keeping effect of the refrigerator.

In a first aspect, the present application provides a refrigerator comprising: freezing chamber and freezing air duct;

the freezing air duct is connected with the freezing chamber;

an evaporator and a refrigerating fan are arranged in the refrigerating air duct;

the freezing chamber is provided with a first freezing space and a second freezing space;

the first refrigerating space is connected with the refrigerating air duct through an electric air door;

the bottom of the first freezing space is provided with a first temperature sensing bulb, and the top of the first freezing space is provided with an auxiliary fan; a second temperature sensing bulb is arranged at the bottom of the second freezing space;

the refrigeration fan, the electric air door, the first temperature sensing bag, the auxiliary fan and the second temperature sensing bag are respectively connected with a controller;

the controller is configured to:

acquiring the temperature of a first freezing space detected by the first temperature sensing bulb and the temperature of a second freezing space detected by the second temperature sensing bulb;

if the temperature of the first refrigerating space is within a preset range, a first instruction is sent to control the auxiliary fan to be started, the electric air door is started, and the rotating speed of the refrigerating fan is the highest rotating speed;

and if the temperature of the second refrigerating space is within the preset range and the temperature of the first refrigerating space is not within the preset range, sending a second instruction to control the electric air door to be closed and the auxiliary fan to be closed, wherein the rotating speed of the refrigerating fan is the highest rotating speed.

Optionally, the first freezing space and the second freezing space each comprise a drawer, and the drawer comprises a bottom plate and a door plate; the door plate is provided with a conductive strip; the bottom plate is connected with a metal plate, and the conducting strips are connected with the metal plate.

Optionally, the first freezing space further comprises a conductive sliding block, and the metal plate is connected with the first temperature sensing bulb; the conductive sliding block is connected with the conductive strip.

Optionally, the freezing chamber further comprises a conductive port, one end of the conductive port is connected with the conductive sliding block, and the other end of the conductive port is connected with the controller.

Optionally, the first refrigerating space further comprises an air inlet, the first refrigerating space is connected with the refrigerating air duct through the air inlet, and the electric air door is arranged at the air inlet.

Optionally, the device further comprises a defrosting sensor, wherein the defrosting sensor is arranged on the evaporator and is connected with the controller;

the controller is configured to:

acquiring an operation mode of the evaporator detected by the defrosting sensor;

and if the operation mode of the evaporator is a defrosting mode, sending a closing instruction to the electric air door and sending a closing instruction to the auxiliary fan so as to control the operation of the evaporator for a first preset time.

Optionally, the refrigerator further comprises a refrigerating chamber, a refrigerating temperature sensor is arranged in the refrigerating chamber, a freezing temperature sensor is arranged in the freezing chamber, and the refrigerating temperature sensor and the freezing temperature sensor are respectively connected with the controller;

the controller is further configured to:

acquiring the temperature of a refrigerating chamber detected by the refrigerating temperature sensor, and the temperature of a freezing chamber detected by the freezing temperature sensor;

and controlling the rotating speed of the refrigerating fan according to the temperature of the refrigerating chamber and the temperature of the freezing chamber.

Optionally, the controller is further configured to:

and if the temperature of the second freezing space is smaller than the minimum value of the preset range and the temperature of the first freezing space is smaller than the minimum value of the preset range, a third instruction is sent to control the rotating speed of the refrigerating fan.

In a second aspect, the present application provides a control method for a refrigerator, which is applied to the refrigerator in the first aspect, and includes:

acquiring the temperature of a first freezing space detected by a first temperature sensing bulb and the temperature of a second freezing space detected by a second temperature sensing bulb;

if the temperature of the first refrigerating space is within the preset range, a first instruction is sent to control the auxiliary fan to be started, the electric air door is started, and the rotating speed of the refrigerating fan is the highest rotating speed;

and if the temperature of the second refrigerating space is within the preset range and the temperature of the first refrigerating space is not within the preset range, sending a second instruction to control the electric air door to be closed and the auxiliary fan to be closed, wherein the rotating speed of the refrigerating fan is the highest rotating speed.

According to the technical scheme, the refrigerator comprises a freezing chamber and a freezing air duct; the freezing air duct is connected with the freezing chamber; an evaporator and a refrigerating fan are arranged in the refrigerating air duct; the freezing chamber is provided with a first freezing space and a second freezing space; the first refrigerating space is connected with the refrigerating air duct through an electric air door; the bottom of the first freezing space is provided with a first temperature sensing bulb, and the top of the first freezing space is provided with an auxiliary fan; a second temperature sensing bulb is arranged at the bottom of the second freezing space; the refrigeration fan, the electric air door, the first temperature sensing bag, the auxiliary fan and the second temperature sensing bag are respectively connected with a controller; the controller is configured to: acquiring the temperature of a first freezing space detected by the first temperature sensing bulb and the temperature of a second freezing space detected by the second temperature sensing bulb; if the temperature of the first refrigerating space is within a preset range, a first instruction is sent to control the auxiliary fan to be started, the electric air door is started, and the rotating speed of the refrigerating fan is the highest rotating speed; and if the temperature of the second refrigerating space is within the preset range and the temperature of the first refrigerating space is not within the preset range, sending a second instruction to control the electric air door to be closed and the auxiliary fan to be closed, wherein the rotating speed of the refrigerating fan is the highest rotating speed. The cold quantity distribution of the first refrigerating space is realized by detecting the temperatures of the first refrigerating space and the second refrigerating space and controlling the opening or closing of the electric air door and the auxiliary fan through the controller, so that the problem of poor fresh-keeping effect of the refrigerator is solved.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a side view of a refrigerator provided in an embodiment of the present application;

fig. 2 is a front view of a refrigerator according to an embodiment of the present application;

fig. 3 is a flowchart of a control method of a refrigerator according to an embodiment of the present application.

Reference numerals:

wherein, 1-freezing chamber; 11-a first refrigerated space; 111-a first bulb; 112-auxiliary fans; 12-a second refrigerated space; 121-a second bulb; 13-a freezing temperature sensor; 2-freezing air duct; 21-a refrigeration fan; 3-an electric damper; 4-a controller; 51-conducting strips; 52-a metal plate; 53-conductive slider; 6, an air inlet; 71-defrosting sensors; 72-an evaporator; 8-a refrigerating chamber; 81-refrigeration temperature sensor.

Detailed Description

Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the examples below do not represent all embodiments consistent with the present application. Merely as examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

Meat products are stored in a refrigerator in a freezing way, ice crystals are formed in the cooling process, the growth of the ice crystals can damage cell membranes of the meat products, the cells are broken, nutrients are lost along with water after thawing, and the delicate flavor is further reduced. Therefore, the air supply temperature of the refrigerator can be reduced, the air supply speed and the temperature difference of food to be cooled are increased, the meat product is accelerated to quickly pass through the ice crystal zone in a temperature difference increasing mode, the generation amount of ice crystals in meat food materials is reduced, and the growth size of the ice crystals is reduced, if the deep freezing temperature is lower than-40 ℃, the deep freezing technology can make the meat difficult to defrost, the deep freezing power consumption is high, the defrosting frequency of the refrigerator is increased, the electric heating mode is used for periodically defrosting, the temperature of the upper part of the freezing chamber is increased more due to the rising of hot air in the heating process, the food is repeatedly thawed and frozen, and the storage and fresh-keeping effects of the food are poor.

In order to solve the problem of poor fresh-keeping effect of a refrigerator, referring to fig. 1-2, some embodiments of the present application provide a refrigerator, including: a freezing chamber 1 and a freezing air duct 2; the freezing air duct 2 is connected with the freezing chamber 1; a refrigerating fan 21 is arranged in the refrigerating air duct 2; the freezing chamber 1 is provided with a first freezing space 11 and a second freezing space 12; the first refrigerating space 11 is connected with the refrigerating air duct 2 through the electric air door 3; the bottom of the first freezing space 11 is provided with a first temperature sensing bulb 111, and the top of the first freezing space 11 is provided with an auxiliary fan 112; a second temperature sensing bulb 121 is arranged at the bottom of the second freezing space 12; the refrigerating fan 21, the electric air door 3, the first temperature sensing bulb 111, the auxiliary fan 112 and the second temperature sensing bulb 121 are respectively connected with the controller 4.

The controller 4 is configured to:

the first freezing space temperature detected by the first bulb 111 and the second freezing space temperature detected by the second bulb 121 are obtained.

If the first refrigerating space temperature is within the preset range, a first instruction is sent to control the auxiliary fan 112 to be started, the electric air door 3 is started, and the rotating speed of the refrigerating fan 21 is the highest rotating speed.

If the second freezing space temperature is within the preset range and the first freezing space temperature is not within the preset range, a second instruction is sent to control the electric air door 3 to be closed and the auxiliary fan 112 to be closed, and the rotating speed of the refrigerating fan 21 is the highest rotating speed.

The first refrigerating space 11 is disposed at the uppermost part of the freezing chamber 1, the second refrigerating space 12 is disposed below the first refrigerating space 11, the first refrigerating space 11 is connected with the refrigerating air duct 2 through the electric air door 3, the communication state of the first refrigerating space 11 and the refrigerating air duct 2 can be controlled by controlling the opening or closing of the electric air door 3, after the electric air door 3 is opened, the first refrigerating space 11 is communicated with the refrigerating air duct 2, and after the electric air door 3 is closed, gas in the refrigerating air duct 2 cannot enter the first refrigerating space 11. The first temperature sensing bulb 111 is arranged in the first freezing space 11, the second temperature sensing bulb 121 is arranged in the second freezing space 12, the temperature in the first freezing space 11 can be detected through the first temperature sensing bulb 111, the temperature in the second freezing space 12 can be detected through the second temperature sensing bulb 121, and the rotating speed of the refrigerating fan 21, the opening or closing of the auxiliary fan 112 and the opening or closing of the electric air door 3 are controlled according to the temperature in the first freezing space 11 and the temperature in the second freezing space 12.

Specifically, after the controller 4 obtains the first freezing space temperature and the second freezing space temperature from the first temperature sensing bulb 111 and the second temperature sensing bulb 121, the control of the electric damper 3, the auxiliary blower 112, and the cooling blower 21 may be implemented according to the first freezing space temperature and the second freezing space temperature.

When the temperature of the first freezing space is within the preset range, a first command may be sent to control the auxiliary fan 112 to be turned on, the electric air door 3 to be turned on, and the rotation speed of the cooling fan 21 to be adjusted to the highest rotation speed, so as to increase the cooling capacity entering the first space and further increase the speed of the temperature in the first freezing space 11.

When the second freezing space temperature is within the preset range and the first freezing space temperature is not within the preset range, a second instruction can be sent to control the electric air door 3 to be closed, the auxiliary fan 112 to be closed and the rotating speed of the refrigerating fan 21 to be adjusted to be the highest rotating speed, so that the cooling capacity entering the second freezing space 12 is increased and the electric air door 3 to be closed so that the cooling capacity cannot enter the first freezing space 11, and the temperature of the second freezing space is reduced without affecting the temperature of the first freezing space 11.

By arranging the electric air door 3 and the auxiliary fan 112, the cold energy distribution in the first freezing space 11 is controlled, and the temperatures of the first freezing space 11 and the second freezing space 12 are precisely controlled, so that the fresh-keeping effect of the refrigerator is improved.

Wherein the preset range is a dynamic range value, for example, the preset range is t1-b to t2+a, wherein t1 is-5 ℃, t2 is-1 ℃, and the values of a and b are in the range of 1-4 ℃. By setting the preset range, the first freezing space 11 can meet the fresh-keeping temperature, and the fresh-keeping effect of the refrigerator is improved.

In some embodiments, the first cryogen space 11 and the second cryogen space 12 each comprise a drawer comprising a floor and a door panel; the door panel is provided with a conductive strip 51; the bottom plate is connected with a metal plate 52, and the conductive strips 51 are connected with the metal plate 52. The first freezing space 11 also comprises a conductive sliding block 53, and the metal plate 52 is connected with the first temperature sensing bulb 111; the conductive slider 53 is connected to the conductive strip 51. The freezing chamber 1 further includes a conductive port, one end of which is connected with the conductive slider 53, and the other end of which is connected with the controller 4. The first temperature sensing bulb 111 is connected with the controller 4 through the metal plate 52, the electric conductor, the conductive sliding block 53 and the conductive port in sequence, so that the first temperature sensing bulb 111 is conductive, the purpose of circuit communication is achieved, and when the drawer is pushed into the first refrigerating space 11, the conductive sliding block 53 is abutted with the conductive port, so that the temperature detected by the first temperature sensing bulb 111 is transmitted to the controller. It is understood that the conduction mode of the second bulb 121 is the same as that of the second bulb 121. By arranging the conductive strips 51 and the conductive sliding blocks 53, wires do not need to be connected into the drawer from the inside of the box, and meanwhile, the metal plate 52 can assist in cooling food materials, so that the cooling speed of the food materials is improved, and the effects of electric conduction and heat conduction are realized.

In some embodiments, the first freezing space 11 further comprises an air inlet 6, the first freezing space 11 is connected with the freezing air duct 2 through the air inlet 6, and the electric air door 3 is arranged at the air inlet 6. The opening degree of the electric damper 3 is adjusted according to the temperature in the first refrigerating space 11, thereby realizing control of the air intake quantity of the first refrigerating space 11.

In some embodiments, the refrigerator further includes an evaporator 72 and a defrosting sensor 71, the defrosting sensor 71 being provided on the evaporator 72, the defrosting sensor 71 being connected to the controller 4.

The controller 4 is configured to: acquiring an operation mode of the evaporator 72 detected by the defrosting sensor 71; if the operation mode of the evaporator 72 is the defrosting mode, a closing instruction is sent to the electric damper 3, and a closing instruction is sent to the auxiliary fan 112 to control the evaporator 72 to operate for a first preset time. When the operation mode of the evaporator 72 is the defrosting mode, the evaporator 7211 needs to wait for the defrosting to be finished before the operation is performed normally. The controller 4 can control the heating plate on the evaporator 72 to heat the evaporator 72, the heating time is a first preset time, defrosting is performed on the evaporator 72 in a heating mode, and in the heating process, the controller 4 controls the electric air door 3 to be closed so as to reduce the gas with high temperature from entering the first refrigerating space 11. For example, the first preset time is 25 minutes.

In some embodiments, the refrigerator further comprises a refrigerating chamber 8, a refrigerating temperature sensor 81 is arranged in the refrigerating chamber 8, a freezing temperature sensor 13 is arranged in the freezing chamber 1, and the refrigerating temperature sensor 81 and the freezing temperature sensor 13 are respectively connected with the controller 4;

the controller 4 is further configured to: acquiring the temperature of the refrigerating chamber detected by the refrigerating temperature sensor 81 and the temperature of the freezing chamber detected by the freezing temperature sensor 13; the rotation speed of the refrigerating fan 21 is controlled according to the temperature of the refrigerating chamber and the temperature of the freezing chamber.

Wherein, through setting up cold-stored temperature sensor 81 in cold-stored room 8, set up freezing temperature sensor 13 in freezer 1, can acquire cold-stored room temperature and freezer temperature, judge whether to reach the cold-stored start point, when cold-stored room temperature and freezer temperature are higher, can control the refrigerator through controller 4 and start refrigeration.

In some embodiments, the controller 4 is further configured to: if the second freezing space temperature is less than the minimum value of the preset range and the first freezing space temperature is less than the minimum value of the preset range, a third instruction is sent to control the rotating speed of the refrigerating fan 21. When the second freezing space temperature and the first freezing space temperature detected by the controller 4 are both smaller than the minimum value of the preset range, that is, the temperature of the freezing chamber is indicated to reach the optimal temperature for preserving food, the rotation speed of the cooling fan 21 can be controlled to be reduced, so that the cooling fan 21 can maintain the temperatures of the first freezing space 11 and the second freezing space 12 in the working process.

In some embodiments, as shown in fig. 3, an embodiment of the present application further provides a method for controlling a refrigerator, which is applied to the refrigerator provided in the foregoing embodiments, including:

s100: the first freezing space temperature detected by the first bulb 111 and the second freezing space temperature detected by the second bulb 121 are obtained.

S200: if the first refrigerating space temperature is within the preset range, a first instruction is sent to control the auxiliary fan 112 to be started, the electric air door 3 is started, and the rotating speed of the refrigerating fan 21 is the highest rotating speed.

S300: if the second freezing space temperature is within the preset range and the first freezing space temperature is not within the preset range, a second instruction is sent to control the electric air door 3 to be closed and the auxiliary fan 112 to be closed, and the rotating speed of the refrigerating fan 21 is the highest rotating speed.

As can be seen from the above technical solutions, the present application provides a refrigerator and a control method, the refrigerator includes a freezing chamber 1 and a freezing air duct 2; the freezing air duct 2 is connected with the freezing chamber 1; a refrigerating fan 21 is arranged in the refrigerating air duct 2; the freezing chamber 1 is provided with a first freezing space 11 and a second freezing space 12; the first refrigerating space 11 is connected with the refrigerating air duct 2 through the electric air door 3; the bottom of the first freezing space 11 is provided with a first temperature sensing bulb 111, and the top of the first freezing space 11 is provided with an auxiliary fan 112; a second temperature sensing bulb 121 is arranged at the bottom of the second freezing space 12; the refrigeration fan 21, the electric air door 3, the first temperature sensing bulb 111, the auxiliary fan 112 and the second temperature sensing bulb 121 are respectively connected with the controller 4; the controller 4 is configured to: acquiring a first freezing space temperature detected by the first temperature sensing bulb 111 and a second freezing space temperature detected by the second temperature sensing bulb 121; if the temperature of the first refrigerating space is within the preset range, a first instruction is sent to control the auxiliary fan 112 to be started, the electric air door 3 is started, and the rotating speed of the refrigerating fan 21 is the highest rotating speed; if the second freezing space temperature is within the preset range and the first freezing space temperature is not within the preset range, a second instruction is sent to control the electric air door 3 to be closed and the auxiliary fan 112 to be closed, and the rotating speed of the refrigerating fan 21 is the highest rotating speed. By detecting the temperatures of the first freezing space 11 and the second freezing space 12 and controlling the opening or closing of the electric air door 3 and the auxiliary fan 112 through the controller 4, the cold energy distribution of the first freezing space 11 is realized, so that the problem of poor fresh-keeping effect of the refrigerator is solved.

The foregoing detailed description of the embodiments is merely illustrative of the general principles of the present application and should not be taken in any way as limiting the scope of the invention. Any other embodiments developed in accordance with the present application without inventive effort are within the scope of the present application for those skilled in the art.

Claims (9)

1. A refrigerator, comprising: a freezing chamber (1) and a freezing air duct (2);

the freezing air duct (2) is connected with the freezing chamber (1);

a refrigerating fan (21) is arranged in the refrigerating air duct (2);

the freezing chamber (1) is provided with a first freezing space (11) and a second freezing space (12);

the first refrigerating space (11) is connected with the refrigerating air duct (2) through an electric air door (3);

a first temperature sensing bag (111) is arranged at the bottom of the first freezing space (11), and an auxiliary fan (112) is arranged at the top of the first freezing space (11); a second temperature sensing bag (121) is arranged at the bottom of the second freezing space (12);

the refrigeration fan (21), the electric air door (3), the first temperature sensing bag (111), the auxiliary fan (112) and the second temperature sensing bag (121) are respectively connected with a controller (4);

the controller (4) is configured to:

acquiring a first freezing space temperature detected by the first temperature sensing bulb (111), and a second freezing space temperature detected by the second temperature sensing bulb (121);

if the temperature of the first refrigerating space is within a preset range, a first instruction is sent to control the auxiliary fan (112) to be started, the electric air door (3) is started, and the rotating speed of the refrigerating fan (21) is the highest rotating speed;

and if the second freezing space temperature is within a preset range and the first freezing space temperature is not within the preset range, sending a second instruction to control the electric air door (3) to be closed and the auxiliary fan (112) to be closed, wherein the rotating speed of the refrigerating fan (21) is the highest rotating speed.

2. The refrigerator according to claim 1, characterized in that the first (11) and the second (12) freezer spaces each comprise a drawer comprising a bottom plate and a door plate; the door panel is provided with a conductive strip (51); the base plate is connected with a metal plate (52), and the conductive strip (51) is connected with the metal plate (52).

3. The refrigerator according to claim 2, characterized in that the first refrigerating space (11) further comprises a conductive slider (53), the metal plate (52) being connected to the first bulb (111); the conductive slider (53) is connected with the conductive strip (51).

4. A refrigerator according to claim 3, characterized in that the freezer compartment (1) further comprises a conductive port, one end of which is connected to the conductive slider, and the other end of which is connected to the controller (4).

5. The refrigerator according to claim 1, characterized in that the first refrigerating space (11) further comprises an air inlet (6), the first refrigerating space (11) is connected with the refrigerating air duct (2) through the air inlet (6), and the electric air door (3) is arranged at the air inlet (6).

6. The refrigerator according to claim 1, further comprising a defrosting sensor (71) and an evaporator (72), the defrosting sensor (71) being provided on the evaporator (72), the defrosting sensor (71) being connected to the controller (4);

the controller (4) is configured to:

-acquiring an operating mode of the evaporator (72) detected by the defrosting sensor (71);

and if the operation mode of the evaporator (72) is a defrosting mode, sending a closing instruction to the electric air door (3), and sending a closing instruction to the auxiliary fan (112) so as to control the evaporator (72) to operate for a first preset time.

7. The refrigerator according to claim 1, further comprising a refrigerating chamber (8), wherein a refrigerating temperature sensor (81) is provided in the refrigerating chamber (8), a freezing temperature sensor (13) is provided in the freezing chamber (1), and the refrigerating temperature sensor (81) and the freezing temperature sensor (13) are respectively connected to the controller (4);

the controller (4) is further configured to:

acquiring a refrigerating chamber temperature detected by the refrigerating temperature sensor (81), and a freezing chamber temperature detected by the freezing temperature sensor (13);

and controlling the rotating speed of the refrigerating fan (21) according to the temperature of the refrigerating chamber and the temperature of the freezing chamber.

8. The refrigerator according to claim 1, wherein the controller (4) is further configured to:

and if the temperature of the second freezing space is smaller than the minimum value of the preset range and the temperature of the first freezing space is smaller than the minimum value of the preset range, sending a third instruction to control the rotating speed of the refrigerating fan (21).

9. A refrigerator control method, characterized by being applied to the refrigerator of any one of claims 1 to 8, comprising:

acquiring a first freezing space temperature detected by a first temperature sensing bulb (111), and acquiring a second freezing space temperature detected by a second temperature sensing bulb (121);

if the temperature of the first refrigerating space is within a preset range, a first instruction is sent to control the auxiliary fan (112) to be started, the electric air door (3) is opened, and the rotating speed of the refrigerating fan (21) is the highest rotating speed;

and if the second freezing space temperature is within a preset range and the first freezing space temperature is not within the preset range, sending a second instruction to control the electric air door (3) to be closed and the auxiliary fan (112) to be closed, wherein the rotating speed of the refrigerating fan (21) is the highest rotating speed.