CN117469880A - Refrigerator and control method thereof - Google Patents

Abstract

The invention particularly relates to a refrigerator and a control method of the refrigerator. The refrigerator comprises a refrigerator body, a compressor, an evaporator and a heating component for defrosting the evaporator, wherein a compressor bin and a refrigerating compartment are respectively defined in the refrigerator body, the compressor is arranged in the compressor bin, the evaporator and the heating component are arranged in the refrigerating compartment, the refrigerator comprises a shell, and the refrigerator further comprises a first evaporation dish arranged on the shell, a condenser at least partially arranged in the first evaporation dish, a second evaporation dish arranged on the compressor and a drainage component for guiding defrosting water generated when the evaporator is defrosted into the first evaporation dish; wherein the first evaporation pan is controllably conducted with the second evaporation pan. The invention is controllably communicated with the second evaporation dish through the first evaporation dish, reasonably utilizes the heat of the condenser and the compressor, and has the advantages of reasonable arrangement of refrigeration components, energy conservation, high efficiency, high refrigeration efficiency and cost reduction.

Description

Refrigerator and control method thereof

Technical Field

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

Background

When a user of the ink pad uses the refrigerator, due to the influences of local economy, environment and other factors, the user of the ink pad often puts a large amount of water into the refrigerator to obtain cold water or ice cubes for drinking, the heat load brought by the refrigerator is huge, the frosting quantity is increased, the power consumption is increased due to frequent work of the frosting heating wire, the evaporating dish overflows to cause user complaints, most of the refrigerator in the ink pad area is an externally-hung condenser, the service time is long, heat dissipation is influenced after ash is hung on the externally-hung condenser, the power consumption is increased, and the user complaints are also caused. Therefore, it is necessary to study a refrigerator, a control method of the refrigerator to solve the above problems.

Disclosure of Invention

The invention aims to provide a refrigerator with reasonable arrangement of refrigeration components, energy conservation, high efficiency, high refrigeration efficiency and cost reduction.

In order to achieve the above object, an embodiment of the present invention provides a refrigerator, including a case, a compressor, an evaporator, and a heating unit for defrosting the evaporator, wherein a compressor compartment and a refrigerating compartment are defined in the case, respectively, the compressor is disposed in the compressor compartment, the evaporator and the heating unit are disposed in the refrigerating compartment, the case includes a housing, the refrigerator further includes a first evaporation pan disposed on the housing, a condenser at least partially disposed in the first evaporation pan, a second evaporation pan disposed on the compressor, and a drain unit for guiding defrosting water generated when defrosting the evaporator into the first evaporation pan;

the first evaporation pan is controllably communicated with the second evaporation pan so that defrosting water in the first evaporation pan is guided into the second evaporation pan.

As a further improvement of an embodiment of the present invention, the case further includes a liner, a foaming layer disposed between the outer shell and the liner, and the evaporator is disposed near the liner;

the first evaporation pan is arranged above the second evaporation pan.

As a further improvement of an embodiment of the present invention, the first evaporation pan is provided with a through hole for conducting the first evaporation pan and the second evaporation pan;

the refrigerator further includes a switching valve for opening or closing the through hole.

As a further improvement of an embodiment of the present invention, the first evaporation pan is disposed right above the second evaporation pan, and the through hole is disposed at the bottom of the first evaporation pan;

the top of the second evaporation pan is opened.

As a further improvement of an embodiment of the present invention, the first evaporation pan defines a containing cavity therein, the condenser is disposed in the containing cavity, and the drainage component includes a water receiving tray disposed at the bottom of the evaporator, and a drainage pipe communicating the water receiving tray with the containing cavity;

the drain pipe penetrates through the foaming layer and extends into the accommodating cavity in a downward inclined mode.

As a further improvement of an embodiment of the present invention, the first evaporating dish includes an air inlet and an air outlet;

the refrigerator further comprises a fan arranged at the air inlet.

As a further improvement of an embodiment of the present invention, the device further comprises a first liquid level sensor disposed in the first evaporation pan, and a second liquid level sensor disposed in the second evaporation pan.

In order to solve the problems, the invention also provides a control method which is energy-saving, efficient, high in refrigeration efficiency and low in cost.

A control method of a refrigerator as described above, comprising,

acquiring the liquid level H1 of defrosting water in the first evaporation pan, and judging whether the liquid level H1 meets H1 is more than or equal to H _{Preset 1} Wherein H is _{Preset 1} The method comprises the steps of defining an early warning value of a defrosting water liquid level in a first evaporation pan;

when the liquid level H1 meets H1 not less than H _{Preset 1} When the first evaporation pan is communicated with the second evaporation pan.

As a further improvement of one embodiment of the present invention, including,

after the first evaporation dish is communicated with the second evaporation dish, acquiring the liquid level H2 of the defrosting water in the second evaporation dish, and judging whether the liquid level H2 meets H2 is more than or equal to H _{Preset 2} Wherein H is _{Preset 2} Defined as the maximum value of the defrost water level in the second evaporation pan;

when the liquid level H2 meets H2 not less than H _{Preset 2} When the first evaporation pan is disconnected from the second evaporation pan, the flow of the first evaporation pan is disconnected.

As a further improvement of one embodiment of the present invention, the obtained liquid level H1 satisfies h1=h _{Preset 1} Is satisfied by h2=h, the liquid level H2 satisfies the first time value T1 of (2) _{Preset 2} Calculating a time interval T2-T1 between the first time value T1 and the second time value T2;

when a time interval T2-T1 is acquired, judging whether T2-T1 meets T2-T1 and is less than or equal to delta T, wherein delta T is defined as a preset time interval between a first time value T1 and a second time value T2;

when T2-T1 meets T2-T1 not more than delta T, the defrosting interval time of the evaporator is increased.

Compared with the prior art, the invention has the beneficial effects that: the refrigerator and the control method of the refrigerator provided by the invention are characterized in that defrosting water formed by defrosting of an evaporator under the heating action of a heating part is guided to a first evaporation dish through a drainage part, the first evaporation dish on a shell and a condenser at least partially arranged in the first evaporation dish are arranged, heat generated by the condenser in the working process is used for evaporating the defrosting water in the first evaporation dish, and the first evaporation dish is controllably communicated with a second evaporation dish so as to guide the defrosting water in the first evaporation dish into the second evaporation dish. Through the second evaporation pan that sets up on the compressor, the outer wall direct contact of second evaporation pan and compressor at least partially, the heat that the compressor produced in the course of the work provides the heat of evaporation for the defrosting water in the second evaporation pan. When the defrosting water quantity of the first evaporation dish exceeds a certain value, the first evaporation dish and the second evaporation dish are conducted through a control program, and defrosting water flows into the second evaporation dish from the first evaporation dish. Avoid leading to first evaporation dish overflow because the defrosting water yield in the first evaporation dish is too big, the heat that rational utilization condenser and compressor produced to the defrosting water that evaporation evaporator defrosting produced increases evaporation dish total volume, has improved the volume of holding of defrosting water, has that refrigeration part sets up reasonable, energy-conserving high efficiency, refrigeration efficiency is high, reduce cost's advantage.

Drawings

FIG. 1 is a schematic view showing a structural composition of a refrigerator according to the present invention;

fig. 2 is a schematic view showing another structural composition of the refrigerator of the present invention.

In the figure: 11. a compressor; 12. an evaporator; 121. a hook; 13. a condenser; 2. a heating member; 3. a first evaporation pan; 31. a through hole; 32. a receiving chamber; 33. an air inlet; 34. an air outlet; 35. a switch valve; 36. a blower; 4. a second evaporation pan; 5. a water discharge member; 51. a water receiving tray; 52. a drain pipe; 6. a foaming layer; 71. a first liquid level sensor; 72. and a second liquid level sensor.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.

The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1, the present invention relates generally to a refrigerator including a cabinet, a compressor 11, an evaporator 12, and a heating part 2 for defrosting the evaporator 12. The frosting generated by defrosting of the evaporator 12 forms defrosting water under the heating action of the heating part 2. The interior of the box body is respectively defined with a press cabin and a refrigerating compartment, the compressor 11 is arranged in the press cabin, and the evaporator 12 and the heating component 2 are arranged in the refrigerating compartment. The housing also defines a storage chamber therein, and the evaporator 12 is adapted to provide cooling to the storage chamber.

The case includes a housing. The refrigerator further comprises a first evaporation pan 3 arranged on the shell, a condenser 13 at least partially arranged in the first evaporation pan 3, a second evaporation pan 4 arranged on the compressor 11, and a drainage component 5 for guiding defrosting water generated when the evaporator 12 is defrosted into the first evaporation pan 3. Wherein the second evaporation pan 4 is at least partially in direct contact with the outer wall of the compressor 11. By arranging the first evaporation pan 3 and the second evaporation pan 4, the total volume of the evaporation pans is increased, and the containing amount of defrosting water is improved.

The refrigerator further includes a capillary tube. The compressor 11, the condenser 13, the capillary tube and the evaporator 12 are connected in sequence, and a refrigerant is arranged in a refrigeration circuit formed by the compressor 11, the condenser 13, the capillary tube and the evaporator 12.

The refrigerant is compressed into high-temperature high-pressure gas by the compressor 11, and then enters the condenser 13 to exchange heat to form liquid refrigerant. The liquid refrigerant is throttled and depressurized by a capillary tube, then enters the evaporator 12 for heat exchange and gasification, and finally the gaseous refrigerant returns to the compressor 11 to complete the refrigeration cycle.

The condenser 13 is a component of a refrigerating system of the refrigerator, belongs to a type of heat exchanger, and can convert gas or vapor into liquid, and transfer heat in a pipeline of the condenser 13 to the external environment of the pipeline of the condenser 13 in a quick manner, wherein the heat released by the condenser 13 is used for evaporating defrosting water in the first evaporating dish 3.

The first evaporation pan 3 is controllably communicated with the second evaporation pan 4, so that the defrosting water in the first evaporation pan 3 is guided into the second evaporation pan 4.

When the amount of the defrosting water of the first evaporation pan 3 exceeds a certain value, the first evaporation pan 3 is communicated with the second evaporation pan 4 through a control program, and the defrosting water flows into the second evaporation pan 4 from the first evaporation pan 3. The compressor 11 radiates heat to its outside during operation, so that the compressor 11 provides the evaporated heat for the defrost water guided into the second evaporation pan 4. Avoid because the defrosting water yield in the first evaporation pan 3 is too big and lead to first evaporation pan 3 overflow, the heat that produces in the rational utilization condenser 13 and the compressor 11 course of working to the defrosting water that the defrosting of evaporation evaporator 12 produced has that refrigeration part sets up reasonable, energy-conserving high efficiency, advantage that refrigeration efficiency is high.

Further, the bottom of the evaporator 12 is extended downward to form a hook 121 for mounting the heating member 2. Preferably, the heating member 2 is provided as a heating wire.

Further, the case body further includes an inner container, the foaming layer 6 is disposed between the outer shell and the inner container, and the evaporator 12 is disposed near the inner container. The evaporator 12 is used to provide cooling to a storage chamber defined within the liner. Preferably, the first evaporation pan 3 is arranged on the inside of the housing.

The first evaporation pan 3 is arranged above the second evaporation pan 4. The first evaporation pan 3 may be disposed directly above the second evaporation pan 4, so that the defrost water in the first evaporation pan 3 is naturally guided to the second evaporation pan 4. Or the first evaporation pan 3 is communicated with the second evaporation pan 4 through a flow guide pipe, and defrosting water in the first evaporation pan 3 is guided into the second evaporation pan 4 through the flow guide pipe.

Further, the first evaporation pan 3 is provided with a through hole 31 that communicates between the inside of the first evaporation pan 3 and the inside of the second evaporation pan 4.

The refrigerator further includes an opening and closing valve 35 for opening or closing the through hole 31. When the amount of the defrosting water in the first evaporation pan 3 exceeds a certain value, the through hole 31 is opened by controlling the switch valve 35 through the control program, so that the first evaporation pan 3 is communicated with the second evaporation pan 4, and the defrosting water in the first evaporation pan 3 is guided to the second evaporation pan 4 through the through hole 31. It is understood that the defrost water in the first evaporation pan 3 may be directly guided to the second evaporation pan 4 through the through hole 31, or the defrost water in the first evaporation pan 3 may be guided to the second evaporation pan 4 through the through hole 31 and the guiding tube. Has the advantage of easy implementation.

As shown in fig. 1 and 2, the first evaporation pan 3 is further disposed directly above the second evaporation pan 4, and the through hole 31 is disposed at the bottom of the first evaporation pan 3. The top of the second evaporation pan 4 is provided with an opening. When the through hole 31 is opened by the switching valve 35, the first evaporating dish 3 is directly conducted with the second evaporating dish 4 without providing a flow guide pipe. Has the advantages of simple structure and reduced cost.

When the amount of the defrosting water in the first evaporation pan 3 exceeds a certain value, the opening and closing valve 35 is opened through the control program at the moment, so that the first evaporation pan 3 is communicated with the second evaporation pan 4, and the defrosting water in the first evaporation pan 3 is directly downwards guided to the second evaporation pan 4 through the opening and closing valve 31.

Further, the first evaporating dish 3 defines a containing cavity 32 therein, the condenser 13 is disposed in the containing cavity 32, and the water draining member 5 includes a water receiving tray 51 disposed at the bottom of the evaporator 12, and a water draining pipe 52 communicating the water receiving tray 51 with the containing cavity 32.

One end of the drain pipe 52 connected to the water receiving tray 51 is higher than the other end of the drain pipe 52 connected to the accommodating chamber 32, thereby facilitating the flow of the defrost water into the accommodating chamber 32. Specifically, the defrosting water generated by defrosting of the evaporator 12 flows into the defrosting water receiving tray 51, and the drain pipe 52 guides the defrosting water in the defrosting water receiving tray 51 to the accommodating cavity 32. Has the advantages of simple structure and convenient realization.

Wherein the drain pipe 52 extends through the foam layer 6 and obliquely downward into the receiving chamber 32. Further, the first evaporation pan 3 comprises an air inlet 33 and an air outlet 34.

The refrigerator further includes a blower 36 provided at the air inlet 33. The fan 36 sucks air in from the air inlet 33 and the air is discharged through the air outlet 34. The fan 36 rotates to promote evaporation of the defrosting water and accelerate heat dissipation of the condenser 13, so that heat dissipation efficiency of the condenser 13 and evaporation efficiency of the defrosting water are improved, and the defrosting water cooling device has a multi-purpose function.

Further, the first evaporating dish 3 has two sets of side walls, a top wall and a bottom wall, which are disposed opposite to each other.

The air inlet 33 is disposed on the top wall, the air outlet 34 is disposed on the top wall, and the through hole 31 is disposed on the bottom wall.

Further, the refrigerator further includes a first liquid level sensor 71 provided in the first evaporation pan 3, and a second liquid level sensor 72 provided in the second evaporation pan 4. The first liquid level sensor 71 is used for detecting the liquid level in the first evaporation pan 3, and the second liquid level sensor 72 is used for detecting the liquid level in the second evaporation pan 4, so that when the defrosting water quantity of the first evaporation pan 3 exceeds a certain value, the first evaporation pan 3 and the second evaporation pan 4 are communicated through a control program, and the defrosting water flows into the second evaporation pan 4 from the first evaporation pan 3. When the liquid level in the second evaporation pan 4 exceeds a certain value, the first evaporation pan 3 is set not to be communicated with the second evaporation pan 4, and the defrosting water in the first evaporation pan 3 is not guided into the second evaporation pan 4. So as to avoid spilling out of the defrost water in the second evaporation pan 4.

In order to solve the problems, the invention also provides a control method which is energy-saving, efficient, high in refrigeration efficiency and low in cost.

A control method of a refrigerator as described above, comprising,

acquiring the liquid level H1 of the defrosting water in the first evaporation pan 3, and judging whether the liquid level H1 meets H1 not less than H _{Preset 1} Wherein H is _{Preset 1} A pre-warning value defined as the defrosting water level in the first evaporation pan 3;

when the liquid level H1 meets H1 not less than H _{Preset 1} When the first evaporation pan 3 is set in communication with the second evaporation pan 4.

Specifically, when the level H1 of the defrost water of the first evaporation pan 3 exceeds H _{Preset 1} At this time, the first evaporation pan 3 and the second evaporation pan 4 are connected by the control program, and the defrosting water flows from the first evaporation pan 3 into the second evaporation pan 4. The compressor 11 radiates heat to its outside during operation, so that the compressor 11 provides the evaporated heat for the defrost water guided into the second evaporation pan 4. Avoiding overflow of the first evaporation pan 3 caused by overlarge defrosting water quantity in the first evaporation pan 3, and having defrosting water evaporation efficiencyHigh and reasonable flow path of defrosting water.

Further, the control method of the refrigerator includes,

after the first evaporation pan 3 is communicated with the second evaporation pan 4, acquiring the liquid level H2 of the defrosting water in the second evaporation pan 4, and judging whether the liquid level H2 meets H2 not less than H _{Preset 2} Wherein H is _{Preset 2} Defined as the maximum value of the level of defrost water in the second evaporation pan 4;

when the liquid level H2 meets H2 not less than H _{Preset 2} At this time, the flow of the first evaporation pan 3 to the second evaporation pan 4 is disconnected.

In particular, the level H2 in the second evaporation pan 4 exceeds H _{Preset 2} When the first evaporation pan 3 is set not to be communicated with the second evaporation pan 4, the defrosting water in the first evaporation pan 3 is not guided into the second evaporation pan 4. So as to avoid spilling out of the defrost water in the second evaporation pan 4. The maximum value of the defrost water level in the second evaporation pan 4 is smaller than the liquid level of the maximum capacity of the second evaporation pan 4.

Further, the control method of the refrigerator includes,

the acquired liquid level H1 satisfies h1=h _{Preset 1} Is satisfied by h2=h, the liquid level H2 satisfies the first time value T1 of (2) _{Preset 2} Calculating a time interval T2-T1 between the first time value T1 and the second time value T2;

when a time interval T2-T1 is acquired, judging whether T2-T1 meets T2-T1 and is less than or equal to delta T, wherein delta T is defined as a preset time interval between a first time value T1 and a second time value T2;

when T2-T1 satisfies T2-T1. Ltoreq.DeltaT, the defrosting interval time of the evaporator 12 is increased.

For example, when a user uses a large amount of the refrigerator, the heat load of the refrigerator is increased, the evaporator 12 is frosted much, at this time, the shortest frosting interval of the program control is 6 hours, the frosting is frequent, the frosting water quantity is increased, firstly, the frosting water quantity enters the first evaporation pan 3, the frosting water is evaporated by the heat of the condenser 13, the fan 36 rotates to promote the evaporation of the evaporated water and accelerate the heat dissipation of the condenser 13 during the frosting, and when the liquid level H1 of the frosting water of the first evaporation pan 3 exceeds H _{Preset 1} When in use, thisWhen the first evaporation pan 3 is communicated with the second evaporation pan 4 through a control program, the defrosting water flows into the second evaporation pan 4 and is evaporated by the heat of the compressor 11, and when the liquid level H2 in the second evaporation pan 4 exceeds H _{Preset 2} When the flow of the first evaporation pan 3 to the second evaporation pan 4 is disconnected, the fan 36 is also turned off.

If the time interval T2-T1 between the first time value T1 and the second time value T2 is smaller than DeltaT, deltaT is 100 hours, the shortest defrosting time is changed to 10 hours, the working frequency of defrosting components is reduced, and the energy consumption caused by defrosting is reduced. Meanwhile, the refrigerating efficiency is improved, and the energy-saving and high-efficiency advantages are achieved.

Where T2-T1 is the time interval between the trigger operation time of the first level sensor 71 and the trigger operation time of the second level sensor 72.

When the time interval T2-T1 between the first time value T1 and the second time value T2 exceeds 100 hours, the normal control defrosting program is restored, so that not only the evaporation water quantity can be controlled, but also energy saving can be realized.

Further, H _{Preset 1} ＜H _max1 ，H _max1 Defined as the maximum value of the level of defrost water in the first evaporation pan 3; wherein H is _{Preset 1} The maximum value of the defrosting water level in the first evaporation pan 3 and the defrosting frequency of the evaporator 12 are set.

If H _{Preset 1} At the level of the maximum capacity of the first evaporation pan 3, the drain assembly is also guiding the defrosting water, so that the first evaporation pan 3 is extremely easy to overflow, and therefore, H _{Preset 1} ＜H _max1 . To ensure that the first evaporation pan 3 does not overflow.

Specifically H _max1 A liquid level less than the maximum capacity of the first evaporation pan 3. The defrosting frequency of the evaporator 12 determines the amount of water discharged from the first evaporation pan 3 by the defrosting water generated when the evaporator 12 is defrosted.

H _max1 -H _{Preset 1} The difference of the first evaporation pan and the second evaporation pan is set according to the drainage amount of the defrosting water generated during defrosting of the evaporator 12 and guided into the first evaporation pan 3 so as to ensure the first evaporation pan to the greatest extentAnd 3, no overflow phenomenon occurs.

Compared with the prior art, the refrigerator and the control method of the refrigerator provided by the invention have the advantages that the frosted water formed by defrosting of the evaporator 12 under the heating action of the heating part 2 is guided to the first evaporation pan 3 through the drainage part 5, the first evaporation pan 3 on the shell and the condenser 13 at least partially arranged in the first evaporation pan 3 are arranged, the heat generated by the condenser 13 in the working process is used for evaporating the frosted water in the first evaporation pan 3, and the first evaporation pan 3 is controllably communicated with the second evaporation pan 4 so that the frosted water in the first evaporation pan 3 is guided into the second evaporation pan 4. The second evaporation pan 4 is at least partially in direct contact with the outer wall of the compressor 11 by means of the second evaporation pan 4 arranged on the compressor 11, and the heat generated by the compressor 11 during operation provides the heat of evaporation for the defrost water in the second evaporation pan 4. When the amount of the defrosting water of the first evaporation pan 3 exceeds a certain value, the first evaporation pan 3 is communicated with the second evaporation pan 4 through a control program, and the defrosting water flows into the second evaporation pan 4 from the first evaporation pan 3. Avoid leading to first evaporation dish 3 overflow because the defrosting water yield in the first evaporation dish 3 is too big, the heat that rational utilization condenser 13 and compressor 11 produced to the defrosting water that evaporator 12 defrosting produced increases evaporation dish total volume, has improved the volume of holding of defrosting water, has that refrigeration part sets up reasonable, energy-conserving high-efficient, refrigeration efficiency is high, reduce cost's advantage.

In the description of the present specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified and limited otherwise; the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be understood that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (10)

1. A refrigerator comprises a refrigerator body, a compressor, an evaporator and a heating component for defrosting the evaporator, wherein a compressor bin and a refrigerating compartment are respectively defined in the refrigerator body, the compressor is arranged in the compressor bin, the evaporator and the heating component are arranged in the refrigerating compartment, the refrigerator body comprises a shell, and is characterized in that,

the refrigerator further comprises a first evaporation pan arranged on the shell, a condenser at least partially arranged in the first evaporation pan, a second evaporation pan arranged on the compressor, and a drainage component for guiding defrosting water generated when the evaporator is defrosted into the first evaporation pan;

the first evaporation pan is controllably communicated with the second evaporation pan so that defrosting water in the first evaporation pan is guided into the second evaporation pan.

2. The refrigerator of claim 1, wherein: the box body further comprises an inner container, a foaming layer is arranged between the outer shell and the inner container, and the evaporator is arranged close to the inner container;

the first evaporation pan is arranged above the second evaporation pan.

3. The refrigerator of claim 2, wherein: the first evaporation pan is provided with a through hole for conducting the first evaporation pan and the second evaporation pan;

the refrigerator further includes a switching valve for opening or closing the through hole.

4. The refrigerator of claim 3, wherein: the first evaporation pan is arranged right above the second evaporation pan, and the through hole is arranged at the bottom of the first evaporation pan;

the top of the second evaporation pan is opened.

5. The refrigerator of claim 2, wherein: the first evaporation pan is internally provided with a containing cavity, the condenser is arranged in the containing cavity, and the drainage component comprises a water receiving disc arranged at the bottom of the evaporator and a drainage pipe communicated with the water receiving disc and the containing cavity;

the drain pipe penetrates through the foaming layer and extends into the accommodating cavity in a downward inclined mode.

6. The refrigerator of claim 1, wherein: the first evaporation pan comprises an air inlet and an air outlet;

the refrigerator further comprises a fan arranged at the air inlet.

7. The refrigerator of claim 1, wherein: the device also comprises a first liquid level sensor arranged in the first evaporation dish and a second liquid level sensor arranged in the second evaporation dish.

8. The control method of a refrigerator as claimed in any one of claims 1 to 7, wherein: comprising the steps of (a) a step of,

acquiring the liquid level H1 of defrosting water in the first evaporation pan, and judging whether the liquid level H1 meets H1 is more than or equal to H _{Preset 1} Wherein H is _{Preset 1} The method comprises the steps of defining an early warning value of a defrosting water liquid level in a first evaporation pan;

when the liquid level H1 meets H1 not less than H _{Preset 1} When the first evaporation pan is communicated with the second evaporation pan.

9. The control method according to claim 8, characterized in that: comprising the steps of (a) a step of,

after the first evaporation dish is communicated with the second evaporation dish, acquiring the liquid level H2 of the defrosting water in the second evaporation dish, and judging whether the liquid level H2 meets H2 is more than or equal to H _{Preset 2} Wherein H is _{Preset 2} Defined as the firstMaximum value of defrosting water level in the second evaporation pan;

when the liquid level H2 meets H2 not less than H _{Preset 2} When the first evaporation pan is disconnected from the second evaporation pan, the flow of the first evaporation pan is disconnected.

10. The control method according to claim 8, characterized in that: the acquired liquid level H1 satisfies h1=h _{Preset 1} Is satisfied by h2=h, the liquid level H2 satisfies the first time value T1 of (2) _{Preset 2} Calculating a time interval T2-T1 between the first time value T1 and the second time value T2;

when a time interval T2-T1 is acquired, judging whether T2-T1 meets T2-T1 and is less than or equal to delta T, wherein delta T is defined as a preset time interval between a first time value T1 and a second time value T2;

when T2-T1 meets T2-T1 not more than delta T, the defrosting interval time of the evaporator is increased.