WO2018127164A1

WO2018127164A1 - Refrigerator control method

Info

Publication number: WO2018127164A1
Application number: PCT/CN2018/071710
Authority: WO
Inventors: 付东晓; 钟诚; 郑镇浩
Original assignee: 青岛海尔股份有限公司
Priority date: 2017-01-09
Filing date: 2018-01-08
Publication date: 2018-07-12
Also published as: CN106885417A; CN106885417B

Abstract

A refrigerator control method comprises the steps of: when a freezing compartment starts a switchover from a freezing mode to a cold storage mode, determining whether a cold storage compartment needs to perform refrigeration; if yes, enabling a compressor to be in a shutdown state, closing a freezing air door, opening a cold storage air door, and starting a fan; and if not, starting a heating wire, closing the cold storage air door, and closing the freezing air door, so as to raise the temperature of the freezing compartment, and starting the fan, opening the freezing air door, closing the cold storage air door so as to allow the temperature in the freezing compartment to be uniformly alternated. Accordingly, energy is saved, and the time for switching the freezing mode and the cold storage mode of the freezing compartment is shortened.

Description

Refrigerator control method

The present application claims the priority of the Chinese Patent Application Serial No. JP-A------------

Technical field

The present invention relates to the field of refrigeration devices, and more particularly to a control method for a refrigerator having an energy saving effect.

Background technique

At present, refrigerators on the market have formed independent greenhouses in order to meet the needs of customers, so that when the volume of the refrigerator compartment is insufficient, the temperature of the greenhouse is adjusted to the refrigerating temperature zone, and when the volume of the freezer compartment is insufficient, The temperature of the variable greenhouse is adjusted to the freezing temperature zone.

However, the volume of the general greenhouse is small and cannot meet the needs of users. For some meats, the freezing function is occasionally used, and for users with relatively large refrigerators, the simple freezer will cause energy waste.

In view of the above, it is necessary to provide an improved control method for a refrigerator to solve the above problems.

Summary of the invention

An object of the present invention is to provide a control method of a refrigerator having an energy saving effect.

In order to achieve the above object, the present invention adopts the following technical solution: a refrigerator control method, the refrigerator includes a refrigerating chamber, a freezing chamber, a refrigerating temperature sensor disposed in the refrigerating chamber, and a freezing temperature disposed in the freezing chamber a sensor, a refrigeration system that supplies a cooling amount to the refrigerating compartment and the freezing compartment, a refrigerating duct that transmits the cooling amount generated by the refrigerating system to the refrigerating compartment, a refrigerating damper provided in the refrigerating duct, and the cooling The cooling capacity generated by the system is transmitted to a freezing duct of the freezing compartment, a freezing damper provided in the freezing duct, a fan, and a controller, and the refrigeration system includes a compressor, a condenser, a capillary, and an evaporator connected in sequence. The refrigerating temperature sensor, the refrigerating temperature sensor, the fan, the compressor, the refrigerating damper, and the freezing damper are electrically connected to the controller, and the setting mode of the freezing chamber includes a freezing mode and a refrigerating mode; and the refrigerator further includes The heating wire on the inner wall of the freezing chamber, the control method comprises the following steps:

After the freezing chamber starts the freezing mode to the refrigerating mode, it is determined whether the refrigerating chamber needs to be cooled, and if so, step a1 is run; if not, step b1 is run;

A1: the compressor remains in the shutdown state, the freezing damper is closed, the refrigerating damper is opened, and the fan is started;

B1: heating wire activation, refrigerating damper closing, freezing damper closing, heating chamber freezing, fan starting, freezing damper opening, refrigerating damper closing, the temperature in the freezing compartment is alternately alternated until the freezing compartment is switched from the freezing mode to the refrigerating mode.

As a further improvement of the technical solution of the present invention, after the step a1, the control method further includes the following steps: determining whether the temperature in the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, operating step a2; if not, operating step A3;

A2: determining whether the freezer compartment is switched from the freezing mode to the refrigerating mode, and if so, controlling the compressor, the start and stop of the fan, and the refrigerating damper according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezer compartment temperature sensor, Opening and closing of the freezing damper; if not, running step b1;

A3: determining whether the continuous running time of the fan reaches a first preset time after the compressor is stopped, and if so, the compressor is started until the temperature in the refrigerating chamber drops to a refrigerating shutdown temperature; if not, then continuing Running step a1;

As a further improvement of the technical solution of the present invention, in the process of running step b1, the control method further comprises the steps of: sensing the temperature in the refrigerating compartment in real time and determining whether the refrigerating compartment needs cooling, and if so, operating step a1; if not, Then continue to run step b1.

As a further improvement of the technical solution of the present invention, the step b1 specifically includes the following steps:

B11: the refrigerating damper is closed, the freezing damper is closed, the heating wire is started, and is continuously operated for a second preset time, and the controller accumulates the number of times the heating wire is activated;

B12: After the heating wire is stopped, the freezing damper is opened, the fan is started and continues to run for M1 minutes;

B13: After the fan is stopped, it is determined whether the freezer compartment is switched from the freezing mode to the refrigerating mode, and if so, the compressor and the fan are started and stopped according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor. And opening and closing the refrigerating damper and the freezing damper, and the controller clears the number of times the heating wire is activated; if not, the steps b11 to b13 are cyclically operated until the freezing chamber is switched from the freezing mode to the refrigerating mode.

As a further improvement of the technical solution of the present invention, the second preset time in step b11 is gradually decreased as the number of times the heating wire is started by the controller increases.

As a further improvement of the technical solution of the present invention, after the freezing chamber is switched from the freezing mode to the refrigerating mode, the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor respectively control the start and stop of the compressor and the fan. And the opening and closing of the refrigerating damper and the freezing damper specifically include the following steps:

Determining whether the refrigerating compartment and/or the freezing compartment require refrigeration, and if so, operating step c1; if not, the compressor remains in a stopped state, the fan remains in a stopped state, the refrigerating damper is closed, and the freezing damper is closed;

C1: if the refrigerating compartment needs to be cooled, the compressor is kept in a shutdown state, the fan is started, the refrigerating damper is opened, and it is determined whether the temperature of the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, the fan is stopped; if not, then step c2 is performed;

If the freezer compartment needs to be cooled, the compressor remains in the shutdown state, the fan is started, the freezing damper is opened, and it is determined whether the temperature of the freezer compartment is lowered to the shutdown temperature corresponding to the refrigerating mode, and if so, the fan is stopped, and if not, the operation is performed. Step c2';

C2: determining whether the time during which the fan is continuously stopped after the compressor is in the shutdown state in step c1, whether the time during which the fan is continuously started reaches a third preset time, and if so, the compressor is started until the temperature of the refrigerator compartment is lowered To the refrigerating shutdown temperature; if not, the fan continues to operate.

C2': determining whether the time during which the fan continues to be started reaches a third preset time after the compressor is in the shutdown state in step c1, and if so, the compressor is started until the temperature of the freezer compartment Drops to the shutdown temperature corresponding to the refrigerated mode; if not, the fan continues to operate.

As a further improvement of the present invention, before the freezing chamber starts the freezing mode to the refrigerating mode, the control method further includes the following steps:

Determining whether the refrigerating compartment and/or the freezing compartment require refrigeration; if yes, operating step d1; if not, stopping the compressor, stopping the fan, shutting down the refrigerating damper, closing the refrigerating damper;

D1: if the refrigerating compartment needs to be cooled, the compressor is kept in a shutdown state, the fan is started, the refrigerating damper is opened, and it is determined whether the temperature of the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, the fan is stopped; if not, then step d2 is performed;

If the freezer compartment needs to be cooled, the compressor remains in the shutdown state, the fan is started, the freezing damper is opened, and it is determined whether the temperature of the freezer compartment drops to the shutdown temperature corresponding to the freezing mode, and if so, the fan is stopped, and if not, the operation is performed. Step d2';

D2: determining whether the time during which the fan is continuously started after the compressor remains in the shutdown state in step d1 reaches a fourth preset time, and if so, the compressor is started until the temperature in the refrigerator is lowered. To the refrigerating shutdown temperature; if not, the fan continues to operate.

D2': determining whether the time during which the fan is continuously started reaches the fourth preset time after the compressor is in the shutdown state in step d1, and if so, the compressor is started until the temperature in the freezing chamber The temperature drops to the shutdown temperature corresponding to the freezing mode; if not, the fan continues to operate.

The utility model has the beneficial effects that after the refrigerator in the invention starts the freezing mode to the refrigerating mode in the freezer compartment, on the one hand, the temperature in the refrigerating compartment is sensed in real time, and when the refrigerating compartment needs cooling, the fan is started, and the compressor is kept in a stop state. Cooling of the refrigerating compartment by using the residual amount of cold in the evaporator, reducing the start-up time of the compressor, thereby achieving energy saving effect; on the other hand, when the refrigerating compartment does not require cooling, the heating wire is started, the refrigerating damper is closed, and the refrigerating damper is closed. The freezing chamber is warmed up and the fan is started, the freezing damper is opened, and the refrigerating damper is closed to uniformly alternate the temperature in the freezing chamber to speed up the switching time of the freezing chamber.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing a control method before a freezing compartment is started in a freezing mode to a refrigerating mode in the present invention.

Fig. 2 is a flow chart showing a control method after the freezing compartment is started in the freezing mode to the refrigerating mode in the present invention.

Fig. 3 is a flow chart showing a control method after the heating wire is started to be heated in the freezing compartment after the freezing compartment is started in the freezing mode to the refrigerating mode in the present invention.

4 is a flow chart showing a control method after the freezer compartment is switched from the freezing mode to the refrigerating mode in the present invention.

detailed description

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 to FIG. 4 are preferred embodiments of the present invention.

Referring to FIG. 1 to FIG. 4, the present invention provides a control method for a refrigerator, which can save energy during the process of switching from a freezing mode to a refrigerating mode in a freezer compartment of the refrigerator and during normal cooling of the refrigerator. The temperature in the freezer compartment and the freezer compartment can achieve freshness preservation.

The refrigerator includes a refrigerating chamber, a freezing chamber, a refrigerating temperature sensor disposed in the refrigerating chamber, a freezing temperature sensor disposed in the freezing chamber, and a heating wire disposed on a wall of the inner chamber of the freezing chamber, a refrigerating compartment and a freezing compartment provide a cooling system, a refrigerating duct that transmits the cooling amount generated by the refrigerating system to the refrigerating compartment, a refrigerating damper provided in the refrigerating duct, and a cooling amount generated by the refrigerating system a freezing duct that is transmitted to the freezing compartment, a freezing damper provided in the freezing duct, a fan, and a controller.

The refrigeration system includes a compressor, a condenser, a capillary, and an evaporator connected in sequence, and the refrigerating temperature sensor, the freezing temperature sensor, the fan, the compressor, the refrigerating damper, and the freezing damper are electrically connected to the controller.

The controller controls the opening and closing of the refrigerating damper to control the opening and closing of the refrigerating damper, so that when the refrigerating damper is opened, the compressor and the fan are started to provide cold to the refrigerating compartment the amount.

The controller controls the opening and closing of the freezing damper to control the opening and closing of the freezing air duct, so that when the freezing damper is opened, the compressor and the fan are started to provide cold to the freezing chamber the amount.

The setting mode of the freezing compartment includes a freezing mode and a refrigerating mode, and the controller controls the compressor, the start and stop of the fan, and the refrigerating damper according to the temperature sensed by the freezing temperature sensor and the temperature sensed by the refrigerating temperature sensor, Opening and closing of the freezing damper.

Specifically, when the freezing chamber runs the freezing mode, the controller controls the freezing damper to open, the fan to start, and compress when the temperature of the freezing chamber sensed by the freezing temperature sensor reaches the starting temperature corresponding to the freezing mode. The machine is kept in a shutdown state to first provide cooling capacity to the freezer compartment by utilizing residual cooling capacity on the evaporator, thereby reducing compressor start-up time and achieving energy saving effect. If the temperature of the freezing chamber has not dropped to the shutdown temperature corresponding to the freezing mode when the compressor remains in the shutdown state and the fan continues to start for a preset time, the compressor is started until the temperature in the freezing chamber Drop to the shutdown temperature corresponding to the freeze mode. After the temperature of the freezer compartment sensed by the freezing temperature sensor drops to the shutdown temperature corresponding to the freezing mode, the controller controls the freezing damper to close, the compressor to stop, and the fan to stop.

When the freezing chamber is in the refrigerating mode, the controller controls the freezing damper to open, the fan to start, and the compressor to stop when the temperature of the freezing chamber sensed by the freezing temperature sensor reaches the starting temperature corresponding to the refrigerating mode The state is to first provide a cooling capacity to the freezing chamber by using the residual cooling amount on the evaporator, thereby reducing the startup time of the compressor and achieving the energy saving effect. If the temperature of the freezing chamber has not dropped to the shutdown temperature corresponding to the refrigerating mode when the compressor remains in the stop state and the fan continues to start for a preset time, the compressor is started until the temperature in the freezing chamber Drop to the shutdown temperature corresponding to the refrigerated mode. After the temperature of the freezer compartment sensed by the freezing temperature sensor drops to a shutdown temperature corresponding to the refrigerating mode, the controller controls the freezing damper to close, the compressor to stop, and the fan to stop.

When the temperature sensed by the refrigerating temperature sensor rises to the refrigerating start temperature, that is, when the refrigerating compartment needs to be cooled, the controller controls the refrigerating damper to open, the fan to start, and the compressor to remain in a stop state, so as to first utilize the evaporator The residual amount of cold provides a cooling capacity to the refrigerating compartment, thereby reducing the time required for the compressor to start, achieving an energy saving effect. If the temperature of the refrigerating compartment has not dropped to the refrigerating shutdown temperature when the compressor is kept in the shutdown state and the fan is continuously started for a preset time, the compressor is started until the temperature in the refrigerating compartment drops to the refrigerating state. Shutdown temperature. After the temperature sensed by the refrigerating temperature sensor drops to the refrigerating shutdown temperature, the controller controls the refrigerating damper to close, the compressor to stop, and the fan to stop.

Of course, if both the freezing compartment and the refrigerating compartment require cooling, the controller controls the refrigerating damper and the freezing damper to open; if the temperature in the freezing compartment reaches the shutdown temperature corresponding to the setting mode, and the refrigerating compartment When the temperature does not reach the refrigerating shutdown temperature, the controller only controls the freezing damper to be closed, so that the cooling amount cannot be delivered to the freezing compartment to prevent the phenomenon of supercooling; similarly, if the temperature in the refrigerating compartment reaches the refrigerating temperature The shutdown temperature, and the temperature in the freezing compartment does not reach the shutdown temperature corresponding to the setting mode, the controller controls the refrigerating damper to be closed, so that the cold quantity cannot be delivered to the refrigerating compartment, preventing the phenomenon of supercooling, causing the food to freeze Bad, affecting the preservation effect.

The control method specifically includes the following steps:

Before the freezing chamber is started in the freezing mode to the refrigerating mode, that is, when the freezing chamber is operated in the freezing mode, the control method includes the following steps:

In step d1, when the refrigerating compartment needs cooling or the freezing compartment needs to be cooled, the fan is started first, and the compressor is kept in a shutdown state, so that the residual amount of the evaporator is used first, thereby reducing the startup time of the compressor and achieving energy saving. effect.

In step d2, if the continuous running time of the fan reaches the fourth preset time, and the temperature in the refrigerating compartment does not drop to the refrigerating shutdown temperature, the compressor is started to provide cooling capacity to the refrigerating compartment to prevent the refrigerating compartment from being kept fresh. effect.

D2': determining whether the time during which the fan continues to be started reaches a fourth preset time after the compressor is in the shutdown state in step d1, and if so, the compressor is started until the temperature in the freezing chamber The temperature drops to the shutdown temperature corresponding to the freezing mode; if not, the fan continues to operate.

In step d2', if the fan continuous running time reaches the fourth preset time, and the temperature in the freezing chamber does not drop to the shutdown temperature corresponding to the freezing mode, the compressor is started to provide cooling capacity to the freezing chamber to prevent the lowering of the cooling chamber. The freezing effect of the freezer compartment.

After the freezing mode to the refrigerating mode is started in the freezing compartment, the control method includes the following steps:

Determining whether the refrigerating compartment requires refrigeration, and if so, operating step a1; if not, operating step b1;

That is, in the process of switching the freezing compartment from the freezing mode to the refrigerating mode, the temperature of the refrigerating compartment is sensed in real time and it is judged whether the refrigerating compartment requires refrigeration, and when the refrigerating compartment requires cooling, the refrigerating is given The room is provided with a cooling capacity to ensure the freshness preservation effect of the refrigerator compartment.

That is, when it is necessary to supply a cold amount to the refrigerating chamber, the refrigerating chamber is first supplied with a cooling amount by using the residual cold amount on the evaporator, thereby reducing the time for starting the compressor and achieving an energy saving effect.

Determining whether the temperature in the refrigerating compartment drops to the refrigerating shutdown temperature, if yes, then step a2; if not, then step a3;

In step a3, if the continuous running time of the fan reaches the first preset time, and the temperature in the refrigerating compartment does not drop to the refrigerating shutdown temperature, the compressor is started to provide cooling capacity to the refrigerating compartment to prevent the fresh-keeping effect of the refrigerating compartment from being lowered. .

Step b1 specifically includes the following steps:

B13: After the fan is stopped, it is determined whether the freezer compartment is switched from the freezing mode to the refrigerating mode, and if so, the compressor and the fan are started and stopped according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor. And opening and closing the refrigerating damper and the freezing damper, and the controller clears the number of times the heating wire is started; if not, the steps b11 to b13 are cyclically operated until the freezing chamber is switched from the freezing mode to the refrigerating mode.

In step b1, after the heating wire is continuously activated for a second predetermined time, the fan is started and the freezing damper is opened to make the temperature in the freezing chamber uniform, and the phenomenon of local overheating in the freezing chamber is prevented.

Meanwhile, in the step b1, when the freezing damper is opened and the fan is started to make the temperature in the freezing compartment uniform, the refrigerating compartment damper is kept closed to prevent heat from being transferred into the refrigerating compartment, and the temperature in the refrigerating compartment is fluctuated. Too large, affecting the preservation effect.

In addition, the second preset time in the step b11 is gradually decreased as the number of times the heating wire is accumulated by the controller is gradually decreased, that is, the heating time of the heating wire is constant with the temperature in the freezing chamber. The temperature difference between the refrigerating mode of the freezer compartment is reduced to prevent excessive heating, resulting in excessive temperature in the freezing compartment, resulting in unnecessary waste of energy.

In step b13, if the freezer compartment is switched from the freezing mode to the refrigerating mode, the controller resets the number of times the heating wire is activated to re-count after the freezing mode is restarted in the freezing compartment next time.

After the step a1 is run, the control method further includes the following steps:

In the process of running step b1, the control method further comprises the steps of: sensing whether the refrigerating compartment requires refrigeration in real time, and if so, running step a1; if not, continuing to run step b1.

That is, in the process of switching the freezer compartment from the freezing mode to the refrigerating mode, the temperature in the refrigerating compartment is sensed in real time to provide a cooling amount to the refrigerating compartment when the refrigerating compartment requires cooling, to ensure The preservation effect of the refrigerator compartment.

After the freezing chamber is switched from the freezing mode to the refrigerating mode in steps a2 and b13, the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor respectively control the start and stop of the compressor and the fan, and The opening and closing of the refrigerating damper and the freezing damper specifically includes the following steps:

In step c1, when the refrigerating compartment needs cooling or the freezing compartment needs to be cooled, the fan is started first, and the compressor is kept in a shutdown state, so that the residual amount of the evaporator is used first, thereby reducing the startup time of the compressor and achieving energy saving. effect.

In step c2, if the continuous running time of the fan reaches the third preset time, and the temperature in the refrigerating compartment does not drop to the refrigerating shutdown temperature, the compressor is started to provide cooling capacity to the refrigerating compartment to prevent the refrigerating compartment from being kept fresh. effect.

In step c2', if the continuous running time of the fan reaches the third preset time, and the temperature in the freezing compartment does not drop to the shutdown temperature corresponding to the refrigerating mode, the compressor is started to provide cooling capacity to the freezing compartment to prevent the lowering of the cooling chamber. The freezing effect of the freezer compartment.

In summary, after the refrigerator is activated in the freezing mode to the refrigerating mode in the freezer compartment, on the one hand, the temperature in the refrigerating compartment is sensed in real time, and when the refrigerating compartment needs cooling, the fan is started, and the compressor is kept in a shutdown state to utilize The residual amount of cold in the evaporator supplies cooling to the refrigerating compartment, reducing the start-up time of the compressor, thereby achieving energy saving effect; on the other hand, when the refrigerating compartment does not require cooling, the heating wire is started, the refrigerating damper is closed, and the freezing damper is closed for freezing. The temperature rise of the chamber and the start of the fan, the opening of the freezing damper, and the closing of the refrigerating damper make the temperature in the freezing chamber alternately alternate to accelerate the switching time of the freezing chamber.

It should be understood that, although the description is described in terms of embodiments, the embodiments are not intended to be construed as a single. The technical solutions in the embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions set forth above are merely illustrative of the possible embodiments of the present invention, and are not intended to limit the scope of the present invention. Changes are intended to be included within the scope of the invention.

Claims

A control method of a refrigerator, comprising: a refrigerating compartment, a freezing compartment, a refrigerating temperature sensor provided in the refrigerating compartment, a freezing temperature sensor provided in the freezing compartment, and a cooling capacity for the refrigerating compartment and the freezing compartment a refrigeration system, a refrigerating air passage that transmits the cooling amount generated by the refrigeration system to the refrigerating compartment, a refrigerating damper provided in the refrigerating duct, and a freezing duct that transmits the cooling amount generated by the refrigerating system to the freezing compartment a freezing damper, a fan and a controller disposed in the freezing duct, the refrigeration system comprising a compressor, a condenser, a capillary tube and an evaporator connected in sequence, the refrigerating temperature sensor, a freezing temperature sensor, a fan, a compressor The refrigerating damper and the freezing damper are electrically connected to the controller, and the setting mode of the freezing compartment includes a freezing mode and a refrigerating mode; and the refrigerator further includes a liner wall disposed in the freezing compartment The heating wire above, the control method comprises the following steps:

After the freezing chamber starts the freezing mode to the refrigerating mode, it is determined whether the refrigerating chamber needs to be cooled, and if so, step a1 is run; if not, step b1 is run;

A1: the compressor remains in the shutdown state, the freezing damper is closed, the refrigerating damper is opened, and the fan is started;

B1: heating wire activation, refrigerating damper closing, freezing damper closing, heating chamber freezing, fan starting, freezing damper opening, refrigerating damper closing, the temperature in the freezing compartment is alternately alternated until the freezing compartment is switched from the freezing mode to the refrigerating mode.
The control method according to claim 1, wherein after the step a1, the control method further comprises the steps of: determining whether the temperature in the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, operating step a2; Otherwise, run step a3;

A2: determining whether the freezer compartment is switched from the freezing mode to the refrigerating mode, and if so, controlling the compressor, the start and stop of the fan, and the refrigerating damper according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezer compartment temperature sensor, Opening and closing of the freezing damper; if not, running step b1;

A3: determining whether the continuous running time of the fan reaches a first preset time after the compressor is stopped, and if so, the compressor is started until the temperature in the refrigerating chamber drops to a refrigerating shutdown temperature; if not, then continuing Run step a1.
The control method according to claim 2, wherein after the freezing chamber is switched from the freezing mode to the refrigerating mode, the compressor is controlled according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor. The start and stop of the fan and the opening and closing of the refrigerating damper and the freezing damper include the following steps:

Determining whether the refrigerating compartment and/or the freezing compartment require refrigeration, and if so, operating step c1; if not, the compressor remains in a stopped state, the fan remains in a stopped state, the refrigerating damper is closed, and the freezing damper is closed;

C1: if the refrigerating compartment needs to be cooled, the compressor is kept in a shutdown state, the fan is started, the refrigerating damper is opened, and it is determined whether the temperature of the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, the fan is stopped; if not, then step c2 is performed;

If the freezer compartment needs to be cooled, the compressor remains in the shutdown state, the fan is started, the freezing damper is opened, and it is determined whether the temperature of the freezer compartment is lowered to the shutdown temperature corresponding to the refrigerating mode, and if so, the fan is stopped, and if not, the operation is performed. Step c2';

C2: determining whether the time during which the fan is continuously started after the compressor is in the shutdown state in step c1, whether the time during which the fan is continuously started reaches a third preset time, and if so, the compressor is started until the temperature of the refrigerator compartment is lowered To the refrigerating shutdown temperature; if not, the fan continues to operate;

C2': determining whether the time during which the fan continues to be started reaches a third preset time after the compressor is in the shutdown state in step c1, and if so, the compressor is started until the temperature of the freezer compartment Drops to the shutdown temperature corresponding to the refrigerated mode; if not, the fan continues to operate.
The control method according to claim 1, wherein in the step of operating step b1, the control method further comprises the steps of: sensing the temperature in the refrigerating chamber in real time and determining whether the refrigerating chamber requires cooling, and if so, operating steps A1; if not, continue to run step b1.
The control method according to claim 1, wherein the step b1 comprises the following steps:

B11: the refrigerating damper is closed, the freezing damper is closed, the heating wire is started, and is continuously operated for a second preset time, and the controller accumulates the number of times the heating wire is activated;

B12: After the heating wire is stopped, the freezing damper is opened, the fan is started and continues to run for M1 minutes;

B13: After the fan is stopped, it is determined whether the freezer compartment is switched from the freezing mode to the refrigerating mode, and if so, the compressor and the fan are started and stopped according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor. And opening and closing the refrigerating damper and the freezing damper, and the controller clears the number of times the heating wire is started; if not, the steps b11 to b13 are cyclically operated until the freezing chamber is switched from the freezing mode to the refrigerating mode.
The control method according to claim 5, wherein the second preset time in step b11 is gradually decreased as the number of times the heater wire is activated by the controller increases.
The control method according to claim 5, wherein after the freezing chamber is switched from the freezing mode to the refrigerating mode, the compressor is controlled according to the temperature sensed by the refrigerating compartment temperature sensor and the temperature sensed by the freezing compartment temperature sensor. The start and stop of the fan and the opening and closing of the refrigerating damper and the freezing damper include the following steps:

Determining whether the refrigerating compartment and/or the freezing compartment require refrigeration, and if so, operating step c1; if not, the compressor remains in a stopped state, the fan remains in a stopped state, the refrigerating damper is closed, and the freezing damper is closed;

C1: if the refrigerating compartment needs to be cooled, the compressor is kept in a shutdown state, the fan is started, the refrigerating damper is opened, and it is determined whether the temperature of the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, the fan is stopped; if not, then step c2 is performed;

If the freezer compartment needs to be cooled, the compressor remains in the shutdown state, the fan is started, the freezing damper is opened, and it is determined whether the temperature of the freezer compartment is lowered to the shutdown temperature corresponding to the refrigerating mode, and if so, the fan is stopped, and if not, the operation is performed. Step c2';

C2: determining whether the time during which the fan is continuously stopped after the compressor is in the shutdown state in step c1, whether the time during which the fan is continuously started reaches a third preset time, and if so, the compressor is started until the temperature of the refrigerator compartment is lowered To the refrigerating shutdown temperature; if not, the fan continues to operate;

C2': determining whether the time during which the fan continues to be started reaches a third preset time after the compressor is in the shutdown state in step c1, and if so, the compressor is started until the temperature of the freezer compartment Drops to the shutdown temperature corresponding to the refrigerated mode; if not, the fan continues to operate.
The control method according to claim 1, wherein said control method further comprises the following steps before said freezing mode is turned into a refrigerating mode in said freezer compartment:

Determining whether the refrigerating compartment and/or the freezing compartment require refrigeration; if yes, operating step d1; if not, stopping the compressor, stopping the fan, shutting down the refrigerating damper, closing the refrigerating damper;

D1: if the refrigerating compartment needs to be cooled, the compressor is kept in a shutdown state, the fan is started, the refrigerating damper is opened, and it is determined whether the temperature of the refrigerating compartment drops to a refrigerating shutdown temperature, and if so, the fan is stopped; if not, then step d2 is performed;

If the freezer compartment needs to be cooled, the compressor remains in the shutdown state, the fan is started, the freezing damper is opened, and it is determined whether the temperature of the freezer compartment drops to the shutdown temperature corresponding to the freezing mode, and if so, the fan is stopped, and if not, the operation is performed. Step d2';

D2: determining whether the time during which the fan is continuously started after the compressor remains in the shutdown state in step d1 reaches a fourth preset time, and if so, the compressor is started until the temperature in the refrigerator is lowered. To the refrigerating shutdown temperature; if not, the fan continues to operate;

D2': determining whether the time during which the fan continues to be started reaches a fourth preset time after the compressor is in the shutdown state in step d1, and if so, the compressor is started until the temperature in the freezing chamber The temperature drops to the shutdown temperature corresponding to the freezing mode; if not, the fan continues to operate.