CN111536736B

CN111536736B - Refrigerator and control method thereof

Info

Publication number: CN111536736B
Application number: CN202010333267.8A
Authority: CN
Inventors: 刘洋; 孙彬; 王凌翔; 宿建光; 宋锋毅
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2022-04-12
Anticipated expiration: 2040-04-24
Also published as: CN111536736A

Abstract

The invention relates to a refrigerator and a control method thereof, wherein the refrigerator comprises at least two refrigeration chambers, a first refrigeration subspace and a second refrigeration subspace are arranged in the same refrigeration chamber, the refrigeration demand temperature of the first refrigeration subspace is higher than that of the second refrigeration subspace, the starting time and the stopping time of a compressor and the accumulated refrigeration time of all the refrigeration subspaces in the same refrigeration chamber are recorded, and when the accumulated refrigeration time of all the refrigeration subspaces in the same refrigeration chamber reaches a first preset time, the accumulated refrigeration time of all the refrigeration subspaces in the same refrigeration chamber does not reach the first preset time, and the accumulated refrigeration time of the starting time and the stopping time of the compressor reaches a second preset time, an evaporator is in a defrosting state. According to the invention, the combination of the first preset time and the second preset time is used as a judgment condition for judging the defrosting of the evaporator, so that the refrigeration requirement of the second refrigeration subspace can be ensured, and meanwhile, the frosting of the evaporator can be avoided or the timeliness and the reliability of the defrosting of the evaporator can be ensured.

Description

Refrigerator and control method thereof

Technical Field

The invention relates to the technical field of household appliances, in particular to a refrigerator and a control method thereof.

Background

With the improvement of living standard of people, people pay more and more attention to the safety and health of food. Fruits and vegetables, meat, seafood, beverages and the like have different suitable storage temperatures, and in order to store various foods more scientifically and healthily, the foods are stored in respective fresh-keeping temperature regions, refrigerators with multiple temperature regions are more and more popular with consumers, and the market share of the refrigerators is gradually increased.

There is a refrigerator having at least two refrigeration compartments: the refrigerating chamber and the freezing chamber are arranged in the same refrigerating chamber, a plurality of refrigerating subspaces with different refrigerating temperature requirements are arranged in the refrigerating chamber, for example, a refrigerating space and a temperature changing space are arranged in the refrigerating chamber, wherein the temperature changing space generally adopts a temperature changing drawer mode, a heat insulation structure is not arranged between the refrigerating space and the temperature changing space, the temperatures are easily influenced mutually, the refrigerating space and the temperature changing space share one air duct, and an evaporator and a fan are arranged in the air duct. The working mode of the refrigerating chamber is that when the refrigerating space needs refrigerating, the evaporator works to generate cold energy; when the temperature-variable space needs to be refrigerated, the evaporator works to generate cold, and when the refrigerating space and the temperature-variable space both need to be refrigerated, the evaporator works to generate cold. The evaporator can generate frosting after working for a long time, and for a refrigerator without a defrosting heater, the evaporator generally needs to be controlled to stop working, circulating air flow is generated between the air duct and the refrigerating space, the evaporator is defrosted through the higher temperature of the refrigerating space, and at the moment, the temperature of the variable temperature space can be influenced, so that the variable temperature space can not reach the required temperature. If the times of defrosting are reduced and the refrigerating time is increased, the temperature of the variable temperature space can reach the standard, but the risk of frosting of the evaporator is greatly increased.

Therefore, for a refrigerator that includes a plurality of cooling subspaces in the same cooling compartment, and the plurality of cooling subspaces share one evaporator and are not provided with a defrosting heater, how to achieve the defrosting reliability of the evaporator and ensure the cooling effect of the temperature-variable cooling subspace is an urgent technical problem to be solved.

Disclosure of Invention

The invention provides a refrigerator, which can solve the technical problems that in the prior art, the same refrigerating chamber comprises a plurality of refrigerating subspaces, the plurality of refrigerating subspaces share one evaporator and a refrigerator without a defrosting heater is not configured, the defrosting reliability of the evaporator is realized, and the refrigerating effect of a variable-temperature refrigerating subspace is ensured.

In order to achieve the purpose, the invention adopts the following technical scheme:

a refrigerator, comprising:

the refrigerator comprises at least two refrigerating chambers, a first refrigerating chamber and a second refrigerating chamber, wherein the at least two refrigerating chambers are used for storing articles, at least two refrigerating subspaces are arranged in the same refrigerating chamber, the refrigerating subspaces comprise a first refrigerating subspace and a second refrigerating subspace, and the refrigerating requirement temperature of the first refrigerating subspace is higher than that of the second refrigerating subspace;

a compressor;

an air duct;

the evaporator is positioned in the air channel and is used for controlled generation of cold or no cold;

a fan and damper for controlled generation of an air flow circulating between the air duct and the refrigerated sub-space;

the refrigerator includes:

the storage module is used for recording the starting-up and stopping time of the compressor and the refrigerating time of all the refrigerating subspaces in the same refrigerating chamber;

the control module is used for controlling the evaporator to be in a defrosting state when the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches a first preset time, the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber does not reach the first preset time, and the accumulated starting-up and stopping time of the compressor reaches a second preset time;

the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber comprises refrigerating time of independent refrigeration of each refrigerating subspace and refrigerating time of simultaneous refrigeration of at least two refrigerating subspaces;

the evaporator is in a defrosting state as follows: the evaporator is controlled not to generate cold energy, and the air flow generated by the fan and the air door is controlled to circulate between the air channel and the first refrigerating subspace;

the first preset time is the time which is determined in advance through experiments and can ensure the refrigeration demand temperature of the second refrigeration subspace and the defrosting of the evaporator;

the second preset time is the time that the accumulated refrigerating time of all refrigerating subspaces in the same refrigerating chamber, which is determined in advance through experiments, does not reach the first preset time and the evaporator starts defrosting.

A refrigerator control method comprises the following steps:

recording the starting-up and stopping time of the compressor and the refrigerating time of all refrigerating subspaces in the same refrigerating chamber;

when the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches a first preset time, the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber does not reach the first preset time, and the accumulated starting time and stopping time of the compressor reaches a second preset time, controlling the evaporator to be in a defrosting state;

Compared with the prior art, the technical scheme of the invention has the following technical effects: the refrigerator comprises a storage module, wherein the storage module records the starting-up and stopping time of a compressor and the accumulated refrigerating time of all refrigerating subspaces in the same refrigerating chamber, and when the accumulated refrigerating time of all refrigerating subspaces in the same refrigerating chamber reaches a first preset time, the accumulated refrigerating time of all refrigerating subspaces in the same refrigerating chamber does not reach the first preset time and the accumulated starting-up and stopping time of the compressor reaches a second preset time, an evaporator is in a defrosting state. The first preset time is the time which is determined by experiments in advance and can ensure the required temperature of the second refrigerating subspace and the defrosting of the evaporator, and the second preset time is the time which is determined by experiments in advance and can ensure the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating compartment does not reach the first preset time and the defrosting of the evaporator starts.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention (with a door removed).

Fig. 2 is a schematic diagram of the positions of an evaporator and a fan in the refrigerator according to the embodiment of the invention.

FIG. 3 is a schematic view showing the flow of gas in the refrigerating compartment of the refrigerator according to the embodiment of the present invention.

Fig. 4 is a schematic block diagram of a specific embodiment of the present invention.

FIG. 5 is a control flow diagram of an embodiment of the present invention.

Fig. 6 is a parameter graph of the refrigerator operation mode 1 according to the embodiment of the present invention.

Fig. 7 is a parameter graph of the refrigerator operation mode 2 according to the embodiment of the present invention.

Fig. 8 is a parameter graph of the refrigerator operation mode 3 according to the embodiment of the present invention.

Fig. 9 is a parameter graph of the refrigerator operation mode 4 according to the embodiment of the present invention.

Reference numerals:

1. a box body; 11. an air duct; 12. a fan; 13. a refrigerated evaporator; 2. a refrigerating chamber; 21. a first refrigerated subspace; 22. a second refrigerated subspace; 23. a third refrigerated subspace; 3. and (4) freezing the chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 3, the refrigerator of the present embodiment includes a cabinet 1, and at least two refrigerating compartments are formed in the cabinet 1: a refrigerating compartment 2 for storing goods and a freezing compartment 3.

The box body 1 is provided with heat preservation layers at the positions corresponding to the refrigerating chamber 2 and the freezing chamber 3, and the heat preservation layers are used for preserving heat of the refrigerating chamber and the freezing chamber.

The refrigerating compartment 2 (the same refrigerating compartment) comprises at least two refrigerating subspaces.

The refrigeration sub-space comprises a first refrigeration sub-space 21 and a second refrigeration sub-space 22, the refrigeration demand temperature of the first refrigeration sub-space 21 being higher than the refrigeration demand temperature of the second refrigeration sub-space 22. The first refrigeration subspace 21 has a higher refrigeration demand temperature than the remaining refrigeration subspaces, and the second refrigeration subspace 22 has a lower refrigeration demand temperature than the remaining refrigeration subspaces.

In this embodiment, the refrigerated compartment 2 comprises a first refrigerated subspace 21, a second refrigerated subspace 22 and a third refrigerated subspace 23. Wherein the refrigeration demand temperature of the first refrigeration subspace 21 is the highest, the refrigeration demand temperature of the second refrigeration subspace 22 is the lowest, and the refrigeration demand temperature of the third refrigeration subspace 23 is between the first refrigeration subspace 21 and the second refrigeration subspace 22 or is the same as the second refrigeration subspace 22.

For example, the first refrigeration subspace 21 of the present embodiment is a refrigeration space, the second refrigeration subspace 22 is a temperature change space, and the third refrigeration subspace is a dry-wet multiplexing space.

An air duct 11 is arranged on the box body 1, the air duct 11 is provided with a first air inlet communicated with the first refrigerating subspace 21, a second air inlet communicated with the second refrigerating subspace 22 and a third air inlet communicated with the third refrigerating subspace 23, the air duct 11 is provided with a return air inlet, the return air inlet is positioned at the bottom of the refrigerating chamber 2, and the first refrigerating subspace 21, the second refrigerating subspace 22 and the third refrigerating subspace 23 share one return air inlet.

A fan 12 is provided in the air duct 11 for controlled start or stop.

An air door (not shown) is arranged at the air inlet and used for opening or closing the air inlet under control.

A first air door is arranged at the first air inlet and used for opening or closing the first air inlet in a controlled mode.

And a second air door is arranged at the second air inlet and used for opening or closing the second air inlet under control.

And a third air door is arranged at the third air inlet and is used for opening or closing the third air inlet in a controlled manner.

The fan 12 and the damper are used to control the generation of an air flow circulating between the air duct 11 and the first refrigerated subspace 21 and/or the second refrigerated subspace 22 and/or the third refrigerated subspace 23.

When the fan 12 is started, the first damper is opened, the second damper and the third damper are closed, and a circulating airflow between the air duct 11 and the first refrigerating subspace 21 is generated; the first damper is closed, the second damper is open, the third damper is closed, and a circulating airflow between the air duct 11 and the second refrigeration subspace 22 is generated; the first damper and the second damper are closed, the third damper is open, and an air flow circulating between the air duct 11 and the third refrigerating subspace 23 is generated; the first damper is opened, the second damper is opened, and the third damper is closed, so that circulating air flows between the air duct 11 and the first and second cooling subspaces 21 and 22 are generated; the first damper is open, the second damper is closed and the third damper is open, creating a circulating airflow between the air duct 11 and the first and third refrigeration subspaces 21, 23; the first damper is closed, the second damper and the third damper are open, creating a circulating airflow between the air duct 11 and the second and third refrigerated subspaces 22, 23; the first damper is open, the second damper is closed and the third damper is open, creating a circulating airflow between the air duct 11 and the first and third refrigeration subspaces 21, 23; the first, second and third dampers are all open, creating a circulating airflow between the wind tunnel 11 and the first, second and third refrigerated subspaces 21, 22 and 23.

The refrigerator comprises a refrigerating system for supplying cold to a refrigerating chamber and a freezing chamber, wherein the refrigerating system comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through pipelines, and the evaporator comprises a refrigerating evaporator corresponding to the refrigerating chamber and a freezing evaporator corresponding to the freezing chamber.

The present embodiment will be described only with respect to the refrigerating compartment with the refrigerating evaporator 13 being located in the duct 11 for controlled or no generation of cooling energy.

When any one or any two or three of the first refrigeration subspace 21, the second refrigeration subspace 22 and the third refrigeration subspace 23 has refrigeration requirements, the refrigeration evaporator 13 is controlled to generate refrigeration, and air flow circulating between the air duct 11 and the refrigeration subspace with the refrigeration requirements is generated by matching the fan 12 and the air door.

Specifically, the refrigerating evaporator 13 is controlled to generate cooling energy by operating a compressor and flowing a refrigerant through the refrigerating evaporator 13. The refrigeration evaporator 13 is controlled not to generate cold by a method in which the refrigerant does not flow through the evaporator 13.

As shown in fig. 4, the refrigerator of the present embodiment further includes:

and the storage module is used for recording the starting-up and stopping time of the compressor and the refrigerating time of all refrigerating subspaces in the same refrigerating chamber.

In this embodiment, the storage module is used to record the refrigerating time of the first refrigerating subspace 21, the refrigerating time of the second refrigerating subspace 22, and the refrigerating time of the third refrigerating subspace 23.

The refrigeration time of the first refrigeration subspace 21 refers to the time that the refrigeration evaporator 13 is controlled to generate cold energy, and the fan 12 and the air door are controlled to generate air flow circulating between the air duct 11 and the first refrigeration subspace 21; the refrigerating time of the second refrigerating subspace 22 refers to the time when the refrigerating evaporator 13 is controlled to generate cold energy and the fan 12 and the air door are controlled to generate air flow circulating between the air duct 11 and the second refrigerating subspace 22; the refrigeration time of the third refrigeration subspace 23 refers to the time when the refrigeration evaporator 13 is controlled to generate refrigeration and the fan 12 and the air door are controlled to generate air flow circulating between the air duct 11 and the third refrigeration subspace 23.

The starting and stopping accumulated time of the compressor refers to the starting and stopping accumulated time of the compressor of the refrigerator under all conditions, and refrigeration starting, freezing starting or variable temperature starting is not distinguished.

And the control module is used for judging the relationship between the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating room and the first preset time and judging the relationship between the starting time and the stopping time of the compressor and the second preset time. When the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches a first preset time, and when the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber does not reach the first preset time and the accumulated starting-up and stopping time of the compressor reaches a second preset time, a control signal is output to the refrigerating evaporator 13, the fan 12 and the air door to control the refrigerating evaporator 13 to be in a defrosting state.

The accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating compartment comprises the refrigerating time of independent refrigeration of each refrigerating subspace and the refrigerating time of simultaneous refrigeration of at least two refrigerating subspaces.

For example, the refrigeration time of the first refrigeration compartment 21 is 10: 20-10: 45. 11: 10-11: 30, of a nitrogen-containing gas; the refrigeration time of the second refrigeration compartment 22 is 10: 30-10: 40. 10: 50-11: 00. the cumulative refrigerating time of all the refrigerating spaces is 10min (10: 20-10: 30 refrigerating time of independent refrigeration of the first refrigerating subspace) +10min (10: 30-10: 40 refrigerating time of simultaneous refrigeration of the second refrigerating subspace and the first refrigerating subspace) +5min (10: 40-10: 45 refrigerating time of independent refrigeration of the first refrigerating subspace) +10min (10: 50-11: 00 refrigerating time of independent refrigeration of the second refrigerating subspace) +20min (11: 10-11: 30 refrigerating time of independent refrigeration of the first refrigerating subspace).

The state of the refrigeration evaporator 13 in the defrosting state is as follows: the refrigeration evaporator 13 is controlled not to generate cold energy, the fan 12 and the air flow generated by the air door are controlled to circulate between the air duct 11 and the first refrigeration subspace 21, and the air with higher temperature in the first refrigeration subspace 21 is utilized to defrost the refrigeration evaporator 13.

The first preset time is a time which is determined in advance through experiments and can ensure the refrigeration demand temperature of the second refrigeration subspace 22 and the defrosting of the refrigeration evaporator 13 is started.

The first preset time can be any value within 50-150min according to different environmental temperatures, if the time is less than 50min, the second refrigerating subspace 22 cannot realize negative temperature, and if the time is more than 150min, the refrigerating evaporator 13 has a frosting hidden danger.

Preferably, the first preset time is 90 min.

The second preset time is a time when the cumulative time of the first refrigerating subspace 21, which is experimentally determined in advance, does not reach the first preset time and the evaporator starts defrosting.

The second predetermined time is the average of the experimental tests at low loop temperature (e.g., 10 degrees). The second preset time is any value within 200-600min, and beyond the range, the refrigeration evaporator 13 has the frosting hidden trouble.

Preferably, the second preset time is 480 min.

When the cooling time of the first cooling subspace 21 overlaps with the cooling time of the remaining cooling subspaces, the cooling time of the first cooling subspace 21 is taken as the accumulated cooling time.

As shown in fig. 6, the first cooling subspace 21 is cold-set with the normal gear (4 ℃ gear), and both the second cooling subspace 22 and the third cooling subspace 23 are closed. At this time, only the first refrigeration subspace 21 is refrigerated and started, the refrigeration is started for about 36min for a single time, the start and stop are carried out for 3 times, the third time is not completed, namely the 90min limit value is reached, and the refrigeration evaporator 13 is in a defrosting state. Defrosting interval 243 min.

As shown in fig. 7, the first refrigeration subspace 21 is refrigerated and set to a normal gear (4 ℃), the second refrigeration subspace 22 is refrigerated and set to a deepest gear (a-3 ℃), the refrigeration startup time is 27min, and the variable temperature startup time is about 8 min. The refrigeration start-up and the temperature-changing start-up are overlapped, the refrigeration is continuously started up for 3 times, the accumulative limit value is reached for 90min, and the refrigeration evaporator 13 is in a defrosting state. Defrosting interval is 320 min.

As shown in fig. 8, the first cooling subspace 21 is cold-stored and set to a high gear, and the number of times of starting is small, and a single start is about 15 min. The second refrigeration subspace 22 is set at a variable temperature with a deep gear (the gear at minus 3 ℃), and the start and stop are very frequent. The second refrigeration subspace 22 is powered on for about 5 minutes a single time. The first refrigeration subspace 21 is started once, the second refrigeration subspace is continuously started for 15 times, the accumulated limit value is reached for 90min, and the refrigeration evaporator 13 is in a defrosting state. Defrosting interval is 338 min.

As shown in fig. 9, when the ambient temperature is relatively low (10 ℃), the first cooling subspace 21 is refrigerated and set to a high gear, and the first cooling subspace 21 is not substantially turned on. Even if the second cooling subspace 22 is set to the lowest gear, the startup time is only 7min, which is very short. And when the second cooling subspace 22 is closed, the defrosting mode cannot be entered. At this time, the running time of the refrigerator (the cumulative time of starting and stopping the compressor) is calculated to reach 480min (8 h), and forced air is blown to defrost once.

The refrigerator also comprises an evaporator temperature detection module for detecting the temperature of the refrigeration evaporator 13, when the temperature of the refrigeration evaporator 13 is greater than the temperature set value of the evaporator, the refrigeration evaporator 13 finishes the defrosting state, and the refrigerator enters the normal operation state.

The embodiment also provides a refrigerator control method:

and recording the starting time and the stopping time of the compressor and the refrigerating time of all the refrigerating subspaces in the same refrigerating chamber.

When the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches a first preset time, and when the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber does not reach the first preset time and the accumulated starting and stopping time of the compressor reaches a second preset time, the evaporator is in a defrosting state.

The evaporator is in a defrosting state as follows: the evaporator is controlled not to generate cold energy, and the air flow generated by the fan and the air door is controlled to circulate between the air channel and the first refrigerating subspace.

The first preset time is the time which is determined in advance through experiments and can ensure the refrigeration demand temperature of the second refrigeration subspace and the defrosting of the evaporator.

The second preset time is the time that the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber, which is measured in advance through experiments, does not reach the first preset time and the evaporator starts defrosting.

When the refrigerating time of the first refrigerating subspace is overlapped with the refrigerating time of the rest refrigerating subspaces, the refrigerating time of the first refrigerating subspace is used as the accumulated refrigerating time.

The first preset time is any value within 50-150 min; the second preset time is an arbitrary value within 200-600 min.

And acquiring the temperature of the evaporator, and controlling the evaporator to finish the defrosting state and the refrigerator to enter a normal running state when the temperature of the evaporator is greater than the set temperature value of the evaporator.

Specifically, as shown in fig. 5, the control flow of the refrigerator of the present embodiment is as follows:

and S1, normally operating the refrigerator. The control module controls components such as a compressor, a fan, an air door and the like according to the actual temperature and the refrigeration demand temperature of each chamber, so that each chamber can meet the refrigeration demand temperature.

And S2, recording the startup and shutdown time of the compressor, and recording the refrigeration time of the first refrigeration subspace 21, the second refrigeration subspace 22 and the third refrigeration subspace 23.

S3, judging whether the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches the first preset time, if so, entering the step S5, otherwise, entering the step S4.

S4, judging whether the startup and shutdown time of the compressor reaches a second preset time, if so, entering a step S5, otherwise, entering a step S1.

And S5, controlling the refrigeration evaporator to be in a defrosting state.

S6, judging whether defrosting is finished, if yes, entering the step S1, otherwise, entering the step S5.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A refrigerator, comprising:

the refrigerator comprises at least two refrigerating chambers, a heat insulation layer and a heat insulation layer, wherein the refrigerating chambers are used for storing articles, at least two refrigerating subspaces are arranged in the same refrigerating chamber, each refrigerating subspace comprises a first refrigerating subspace and a second refrigerating subspace, a heat insulation structure is not arranged between the refrigerating subspaces, and the refrigerating requirement temperature of the first refrigerating subspace is higher than that of the second refrigerating subspace;

a compressor;

the air duct is provided with a first air inlet communicated with the first refrigerating subspace and a second air inlet communicated with the second refrigerating subspace, the air duct is provided with a return air inlet, and the first refrigerating subspace and the second refrigerating subspace share one return air inlet;

the evaporator is positioned in the air channel and used for controlled generation of cold or no cold, and the evaporator corresponds to the refrigerating chamber;

a fan and damper for controlled generation of an air flow circulating between the air duct and the refrigerated sub-space; the first air inlet is provided with a first air door, the second air inlet is provided with a second air door, the air conditioner is characterized in that,

the refrigerator includes:

the storage module is used for recording the starting-up and stopping time of the compressor and recording the refrigerating time of all refrigerating subspaces in the same refrigerating chamber, the refrigerating time of the refrigerating subspaces is the time for the evaporator corresponding to the same refrigerating chamber to be controlled to generate refrigerating capacity, and the fan and the air door are controlled to generate airflow circulating between the air channel and the refrigerating subspaces;

the control module is used for controlling the evaporators corresponding to the same refrigerating chamber to be in a defrosting state when the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches a first preset time, the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber does not reach the first preset time and the accumulated starting-up and stopping time of the compressor reaches a second preset time;

2. The refrigerator as claimed in claim 1, wherein when the cooling time of the first cooling subspace overlaps with the cooling time of the remaining cooling subspaces, the cooling time of the first cooling subspace is used as the accumulated cooling time.

3. The refrigerator according to claim 1, wherein the first preset time is any value within 50-150 min; the second preset time is an arbitrary value within 200-600 min.

4. The refrigerator of claim 1 wherein the first refrigeration subspace has a higher refrigeration demand temperature than the remaining refrigeration subspaces, and the second refrigeration subspace has a lower refrigeration demand temperature than the remaining refrigeration subspaces.

5. The refrigerator of claim 1 wherein the first refrigerated subspace is a refrigerated subspace and the second refrigerated subspace is a temperature swing refrigerated subspace.

6. The refrigerator according to any one of claims 1 to 5, wherein the refrigerator comprises:

the evaporator temperature detection module is used for detecting the temperature of the evaporator, when the temperature of the evaporator is greater than a set value of the temperature of the evaporator, the evaporator finishes a defrosting state, and the refrigerator enters a normal running state.

7. A control method for a refrigerator according to claim 1, wherein the control method comprises:

recording the starting-up and stopping time of a compressor and the refrigerating time of all refrigerating subspaces in the same refrigerating chamber, wherein the refrigerating time of the refrigerating subspaces is the time for the evaporators corresponding to the same refrigerating chamber to be controlled to generate refrigerating capacity, and the fan and the air door are controlled to generate airflow circulating between the air channel and the refrigerating subspaces;

when the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber reaches a first preset time, the accumulated refrigerating time of all the refrigerating subspaces in the same refrigerating chamber does not reach the first preset time, and the accumulated starting time and stopping time of the compressor reaches a second preset time, controlling the evaporators corresponding to the same refrigerating chamber to be in a defrosting state;

8. The method as claimed in claim 7, wherein when the cooling time of the first cooling subspace overlaps with the cooling time of the remaining cooling subspaces, the cooling time of the first cooling subspace is used as the accumulated cooling time.

9. The control method of the refrigerator according to claim 7, wherein the first preset time is any value within 50-150 min; the second preset time is an arbitrary value within 200-600 min.

10. The method as claimed in any one of claims 7 to 9, wherein an evaporator temperature is obtained, and when the evaporator temperature is greater than an evaporator temperature set value, the evaporator is controlled to end a defrosting state, and the refrigerator enters a normal operation state.