阅读说明：本技术 一种化霜系统、冰箱 (Defrosting system and refrigerator ) 是由 赵向辉 刘煜森 杨利生 李靖 于 2019-01-11 设计创作，主要内容包括：本发明属于冰箱领域,公开一种化霜系统,应用于冰箱,包括压缩机、冷凝器和蒸发器,蒸发器设有风机,还包括切换连通装置和蓄冷器；切换连通装置的第一接口连接压缩机的排气口,第二接口连接冷凝器的进口,第三接口连接接水盘化霜管；蓄冷器内设有过冷盘管和蓄冷盘管,过冷盘管的一端连接冷凝器的出口,另一端通过第一干燥过滤器、第一节流装置连接蒸发器的进气端口；蓄冷盘管的一端通过第二节流装置、第二干燥过滤器连接蒸发器的出气端口,另一端通过储液包连接压缩机的吸气口；蒸发器的出气端口还连接电磁阀连接储液包。本方案提供的化霜系统化霜效率高,且利用冷凝热原理,化霜快,间室温升小。本发明还提供了另一种化霜系统和冰箱。(The invention belongs to the field of refrigerators, and discloses a defrosting system which is applied to a refrigerator and comprises a compressor, a condenser, an evaporator, a switching and communicating device and a cold accumulator, wherein the evaporator is provided with a fan; a first interface of the switching communication device is connected with an exhaust port of the compressor, a second interface is connected with an inlet of the condenser, and a third interface is connected with a defrosting pipe of the water pan; a supercooling coil and a cold accumulation coil are arranged in the cold accumulator, one end of the supercooling coil is connected with the outlet of the condenser, and the other end of the supercooling coil is connected with the air inlet port of the evaporator through the first dry filter and the first throttling device; one end of the cold accumulation coil is connected with the air outlet port of the evaporator through a second throttling device and a second dry filter, and the other end of the cold accumulation coil is connected with the air suction port of the compressor through a liquid storage bag; the air outlet port of the evaporator is also connected with an electromagnetic valve to be connected with a liquid storage bag. The defrosting system provided by the scheme has high defrosting efficiency, and utilizes the condensation heat principle, the defrosting is fast, and the temperature rise of the chamber is small. The invention also provides another defrosting system and a refrigerator.)

1. A defrosting system is applied to a refrigerator and comprises a compressor, a condenser and an evaporator, wherein the evaporator is provided with a fan;

a first interface of the switching communication device is connected with an exhaust port of the compressor, a second interface of the switching communication device is connected with an inlet of the condenser, and a third interface of the switching communication device is connected with an air inlet port of the evaporator;

a supercooling coil and a cold accumulation coil are arranged in the cold accumulator, one end of the supercooling coil is connected with the outlet of the condenser, and the other end of the supercooling coil is connected with the air inlet port of the evaporator through a first throttling device; one end of the cold accumulation coil is connected with the air outlet port of the evaporator through a second throttling device, and the other end of the cold accumulation coil is connected with the air suction port of the compressor;

the air outlet port of the evaporator is also connected with an air suction port of the compressor through an electromagnetic valve;

when the defrosting system refrigerates, the first interface of the switching communication device is communicated with the second interface, and the electromagnetic valve is opened;

when the defrosting system carries out defrosting, the first interface of the switching link device is communicated with the third interface, and the electromagnetic valve is closed.

2. The defrosting system of claim 1 further comprising a control device for executing the operating instructions; the control device includes:

a first unit for controlling the switching communication device according to the operation instruction;

the second unit is used for controlling the electromagnetic valve according to the operation instruction;

and the third unit is used for controlling the fan according to the operation instruction.

3. The defrosting system of claim 2, wherein the control device is specifically configured to:

when the operation instruction is a first mode operation instruction, the first unit controls the first interface and the second interface of the switching communication device to be communicated, the second unit controls the electromagnetic valve to be opened, and the third unit controls the fan to operate;

when the operation instruction is a second mode operation instruction, the first unit controls the first interface and the third interface of the switching communication device to be conducted, the second unit controls the electromagnetic valve to be closed, and the third unit controls the fan to stop rotating.

4. The defrosting system according to claim 1 wherein a check valve is provided between the condenser and the regenerator, and a flow direction of the check valve is from an outlet of the condenser to the reservoir.

5. The defrosting system of claim 1 wherein the first throttling device comprises a first capillary tube and the second throttling device comprises a second capillary tube.

6. The defrosting system of claim 1 wherein the switch communication means is a two-position three-way valve.

7. A defrosting system is applied to a refrigerator and comprises a compressor, a condenser and an evaporator, wherein the evaporator is provided with a fan and is characterized in that the evaporator comprises a refrigerating pipeline and a defrosting pipeline; the system also comprises a switching communication device and a cold accumulator;

a first interface of the switching communication device is connected with an exhaust port of the compressor, a second interface of the switching communication device is connected with an inlet of the condenser, and a third interface of the switching communication device is connected with a defrosting pipeline of the evaporator;

a supercooling coil and a cold accumulation coil are arranged in the cold accumulator, one end of the supercooling coil is connected with an outlet of the condenser, the other end of the supercooling coil is connected with a refrigeration pipeline of the evaporator through a first throttling device, and the other end of the refrigeration pipeline is connected with an air suction port of the compressor; one end of the cold accumulation coil is connected with the defrosting pipeline of the evaporator through a second throttling device, and the other end of the cold accumulation coil is connected with the air suction port of the compressor;

when the defrosting system refrigerates, the first interface of the switching communication device is communicated with the second interface;

when the defrosting system defrosts, the first interface of the switching link device is communicated with the third interface.

8. The defrosting system of claim 7 further comprising a control device for executing the operating instructions; the control device includes:

a first unit for controlling the switching communication device according to the operation instruction;

and the third unit is used for controlling the fan according to the operation instruction.

9. The defrosting system of claim 8, wherein the control device is specifically configured to:

when the operation instruction is a first mode operation instruction, the first unit controls the first interface and the second interface of the switching communication device to be communicated, and the third unit controls the fan to operate;

when the operation instruction is a second mode operation instruction, the first unit controls the first interface and the third interface of the switching and communicating device to be communicated, and the third unit controls the fan to stop rotating.

10. A refrigerator characterized by comprising the defrosting system according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of refrigerators, in particular to a defrosting system and a refrigerator.

Background

A refrigerator, as a container for keeping food or other articles in a constant low temperature state, has become one of household appliances essential for modern households.

At present, the refrigerator defrosting mostly adopts an electric heating method, but on one hand, the method has longer time consumption and higher energy consumption; on the other hand, a large amount of heat enters other compartments of the refrigerator during defrosting, so that the temperature of the compartments which do not need defrosting is obviously increased. Therefore, there is a need for improvement in defrosting methods.

Disclosure of Invention

The embodiment of the invention provides a defrosting system and a refrigerator, and aims to solve the problems that normal refrigeration of other compartments is influenced and energy consumption is high due to electric heating defrosting in the prior art. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, a defrosting system is provided.

In some optional embodiments, the system is applied to a refrigerator and comprises a compressor, a condenser and an evaporator, wherein the evaporator is provided with a fan and further comprises a switching communication device and a cold accumulator; a first interface of the switching communication device is connected with an exhaust port of the compressor, a second interface of the switching communication device is connected with an inlet of the condenser, and a third interface of the switching communication device is connected with an air inlet port of the evaporator;

a supercooling coil and a cold accumulation coil are arranged in the cold accumulator, one end of the supercooling coil is connected with the outlet of the condenser, and the other end of the supercooling coil is connected with the air inlet port of the evaporator through a first throttling device; one end of the cold accumulation coil is connected with the air outlet port of the evaporator through a second throttling device, and the other end of the cold accumulation coil is connected with the air suction port of the compressor;

the air outlet port of the evaporator is also connected with an air suction port of the compressor through an electromagnetic valve;

when the defrosting system refrigerates, the first interface of the switching communication device is communicated with the second interface, and the electromagnetic valve is opened;

when the defrosting system carries out defrosting, the first interface of the switching link device is communicated with the third interface, and the electromagnetic valve is closed.

In some optional embodiments, an evaporator defrosting pan pipe is further connected in series between the third interface and the evaporator.

In some optional embodiments, the control device is further included for executing the operation instruction; the control device includes: a first unit for controlling the switching communication device according to the operation instruction; the second unit is used for controlling the electromagnetic valve according to the operation instruction; and the third unit is used for controlling the fan according to the operation instruction.

In some optional embodiments, the control device is specifically configured to:

when the operation instruction is a first mode operation instruction, the first unit controls the first interface and the second interface of the switching communication device to be communicated, the second unit controls the electromagnetic valve to be opened, and the third unit controls the fan to operate;

when the operation instruction is a second mode operation instruction, the first unit controls the first interface and the third interface of the switching communication device to be conducted, the second unit controls the electromagnetic valve to be closed, and the third unit controls the fan to stop rotating.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the defrosting system provided by the scheme utilizes the condensation heat of the refrigerating system to defrost, cold energy is accumulated while defrosting, the cold energy generated in the defrosting mode is stored in the cold accumulator, and the part of cold energy is used for improving the supercooling degree of the refrigerant before throttling of the first throttling device in the refrigerating mode, so that the refrigerating capacity is increased, and the refrigerating efficiency after defrosting is improved. The defrosting efficiency of the defrosting system provided by the scheme is higher than that of electric heating defrosting, and the heat of the refrigerant is released from inside to outside by utilizing the condensation heat principle, so that the heat is sufficient, defrosting is fast, and the temperature rise of the chamber is small.

In some optional embodiments, a phase change cold storage material is further arranged in the cold storage device and used for storing cold. Optionally, the phase change cold storage material is ice water.

In some optional embodiments, a one-way valve is arranged between the condenser and the cold accumulator, and the flow direction of the one-way valve is from the outlet of the condenser to the liquid accumulator.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: when the ambient temperature is too low, under the second mode operation instruction, the high-pressure refrigerant in the evaporator can reversely migrate into the condenser through the first throttling device, the first drying filter and the cold accumulator to influence the defrosting effect, and the one-way valve can be arranged to prevent the phenomenon from generating. In other embodiments, the check valve may be disposed between the evaporator and the first throttling device, or between the first throttling device and the first dry filter, or between the first dry filter and the cold accumulator. The defrosting efficiency of the defrosting system provided by the scheme is higher than that of electric heating defrosting, and the heat of the refrigerant is released from inside to outside by utilizing the condensation heat principle, so that the heat is sufficient, defrosting is fast, and the temperature rise of the chamber is small.

In some alternative embodiments, the first restriction device comprises a first capillary tube and the second restriction device comprises a second capillary tube. In other embodiments, the first throttling device and the second throttling device may also be electronic expansion valves.

In some alternative embodiments, the switching communication device is a two-position three-way valve. In other optional embodiments, the two-ring communication device may also be a first electromagnetic valve and a second electromagnetic valve which are arranged in parallel, one end of the first electromagnetic valve and one end of the second electromagnetic valve are connected in parallel and then connected to the exhaust port of the compressor, and the other end of the first electromagnetic valve is connected to the inlet of the condenser; the other end of the second electromagnetic valve is connected with the defrosting pipe of the water pan.

According to a second aspect of embodiments of the present invention, there is provided another defrosting system.

In some optional embodiments, the system is applied to a refrigerator and comprises a compressor, a condenser and an evaporator, wherein the evaporator is provided with a fan, and comprises a refrigeration pipeline and a defrosting pipeline; the system also comprises a switching communication device and a cold accumulator;

a first interface of the switching communication device is connected with an exhaust port of the compressor, a second interface of the switching communication device is connected with an inlet of the condenser, and a third interface of the switching communication device is connected with a defrosting pipeline of the evaporator;

a supercooling coil and a cold accumulation coil are arranged in the cold accumulator, one end of the supercooling coil is connected with an outlet of the condenser, the other end of the supercooling coil is connected with a refrigeration pipeline of the evaporator through a first throttling device, and the other end of the refrigeration pipeline is connected with an air suction port of the compressor; one end of the cold accumulation coil is connected with the defrosting pipeline of the evaporator through a second throttling device, and the other end of the cold accumulation coil is connected with the air suction port of the compressor;

when the defrosting system refrigerates, the first interface of the switching communication device is communicated with the second interface;

when the defrosting system defrosts, the first interface of the switching link device is communicated with the third interface.

In some optional embodiments, an evaporator defrosting pan pipe is further connected in series between the third interface and the evaporator.

In some optional embodiments, the control device is further included for executing the operation instruction; the control device includes:

a first unit for controlling the switching communication device according to the operation instruction;

and the third unit is used for controlling the fan according to the operation instruction.

In some optional embodiments, the control device is specifically configured to:

when the operation instruction is a first mode operation instruction, the first unit controls the first interface and the second interface of the switching communication device to be communicated, and the third unit controls the fan to operate;

when the operation instruction is a second mode operation instruction, the first unit controls the first interface and the third interface of the switching and communicating device to be communicated, and the third unit controls the fan to stop rotating.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the defrosting system provided by the scheme utilizes the condensation heat of the refrigerating system to defrost, cold energy is accumulated while defrosting, the cold energy generated in the defrosting mode is stored in the cold accumulator, and the part of cold energy is used for improving the supercooling degree of the refrigerant before throttling of the first throttling device in the refrigerating mode, so that the refrigerating capacity is increased, and the refrigerating efficiency after defrosting is improved. The finned tube evaporator with the refrigeration pipeline and the defrosting pipeline is used in the scheme, and the refrigeration pipeline and the defrosting pipeline are all in contact with the fins. The defrosting efficiency of the defrosting system provided by the scheme is higher than that of electric heating defrosting, and the heat of the refrigerant is released from inside to outside by utilizing the condensation heat principle, so that the heat is sufficient, defrosting is fast, and the temperature rise of the chamber is small.

In some optional embodiments, a one-way valve is arranged between the condenser and the cold accumulator, and the flow direction of the one-way valve is from the outlet of the condenser to the liquid accumulator.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: when the ambient temperature is too low, under the second mode operation instruction, the high-pressure refrigerant in the evaporator can reversely migrate into the condenser through the first throttling device, the first drying filter and the cold accumulator to influence the defrosting effect, and the one-way valve can be arranged to prevent the phenomenon from generating. In other embodiments, the check valve may be disposed between the evaporator and the first throttling device, or between the first throttling device and the first dry filter, or between the first dry filter and the cold accumulator. The defrosting efficiency of the defrosting system provided by the scheme is higher than that of electric heating defrosting, and the heat of the refrigerant is released from inside to outside by utilizing the condensation heat principle, so that the heat is sufficient, defrosting is fast, and the temperature rise of the chamber is small.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram illustrating the construction of a defrosting system according to an exemplary embodiment;

FIG. 2 is a schematic structural view of a control device of the defrosting system shown in FIG. 1;

FIG. 3 is a schematic structural view of a defrosting system according to another exemplary embodiment;

fig. 4 is a schematic structural diagram of a control device of the defrosting system shown in fig. 3.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.

Herein, the term "plurality" means two or more, unless otherwise specified.

Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.

Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: three relationships of A or B, or A and B

FIG. 1 is a schematic diagram illustrating the construction of a defrosting system according to an exemplary embodiment; fig. 2 is a schematic structural view of a control device of the defrosting system shown in fig. 1.

As shown in fig. 1, the present embodiment provides a defrosting system applied to a refrigerator, which includes a compressor 10, a condenser 20, an evaporator 30, a blower fan 33 provided on the evaporator 30, a switching communication device 90 and a cold accumulator 50; the first interface of the switching communication device 90 is connected with the exhaust port of the compressor 10, the second interface is connected with the inlet of the condenser 20, and the third interface is connected with the defrosting pipe 34 of the water pan; a supercooling coil 51 and a cold accumulation coil 52 are arranged in the cold accumulator 50, one end of the supercooling coil 51 is connected with the outlet of the condenser 20, and the other end is connected with the air inlet port of the evaporator 30 through a first dry filter 61 and a first throttling device 41; one end of the cold accumulation coil 52 is connected with the air outlet port of the evaporator 30 through the second throttling device 42 and the second dry filter 62, and the other end is connected with the air suction port of the compressor 10 through the liquid storage bag 70; the air outlet of the evaporator 30 is also connected to the solenoid valve 80 and connected to the reservoir 70.

Optionally, the control device 100 is further included, configured to execute the operation instruction; as shown in fig. 2, the control device 100 includes: a first unit 101 for controlling the switching communication device 90 according to the operating command; a second unit 102 for controlling the solenoid valve 80 according to the operation instruction; a third unit 103, configured to control the fan 33 according to the operation instruction.

Optionally, the control device 100 is specifically configured to, when the operation instruction is a first mode operation instruction, control the first unit 101 to conduct the first interface and the second interface of the switching and communicating device 90, control the electromagnetic valve 80 to open by the second unit 102, and control the fan 33 to operate by the third unit 103;

when the operation command is a second mode operation command, the first unit 101 controls the first port and the third port of the switching communication device 90 to be connected, the second unit 102 controls the electromagnetic valve 80 to be closed, and the third unit 103 controls the fan 33 to stop rotating.

Thus, under the first mode operation command, the first port and the second port of the switching communication device 90 are conducted, the solenoid valve 80 is opened, and the blower 33 is operated. At this time, the refrigerant is discharged from the discharge pipe of the compressor 10, enters the condenser 20 through the switching communication device 90, is discharged from the outlet of the condenser 20, enters the tube cooling coil of the cold accumulator 50, enters the first dry filter 61 after being cooled, enters the evaporator 30 after being throttled by the first throttling device 41, enters the liquid storage pack 70 through the pipeline, and returns to the suction port of the compressor 10. Here, the refrigerant discharged from the outlet of the condenser 20 is cooled by the phase change regenerator material in the regenerator 50 while passing through the subcooling coil 51 in the regenerator 50, and the degree of subcooling of the refrigerant increases. Optionally, when the phase-change cold storage material is ice water, the ice water is cooled to cool the supercooling coil 51. Therefore, the refrigerating capacity is increased, and the refrigerating efficiency after defrosting is improved.

Under the second mode operation instruction, the first port and the third port of the switching communication device 90 are conducted, the electromagnetic valve 80 is closed, and the fan 33 is stopped. At this time, after being discharged from the discharge pipe of the compressor 10, the refrigerant enters the defrosting pan pipe 34 through the switching communication device 90, enters the evaporator 30, enters the cold storage coil 52 of the cold storage device 50 through the second dry filter 62 and the second throttling device 42, and then returns to the compressor suction port through the liquid storage bag 70. Wherein, the high-temperature and high-pressure refrigerant discharged from the compressor 10 passes through the defrosting pipe 34 of the water pan and the evaporator 30 to be condensed and release heat, and the released heat is used for defrosting; meanwhile, the refrigerant throttled and cooled by the second throttling device 42 enters the cold storage coil 52 of the cold storage device 50, and the cold energy is stored in the phase change cold storage material in the cold storage device 50. Optionally, when the phase change cold storage material is ice water, the ice is formed by the water.

In the second mode, namely, the defrosting mode, the utilized heat comes from the condensation heat, the cold accumulator 50 accumulates cold while defrosting, and the accumulated cold is used for cooling the refrigerant at the outlet of the condenser 20 in the refrigerating mode, so that the efficiency is improved, and the energy is saved compared with the electric heating mode; in addition, the defrosting is from inside to outside, and compared with electric heating, the heat loss is less, and the temperature rise amplitude of the compartment is reduced.

By adopting the scheme, the condensation heat of the refrigerating system is utilized to defrost, the cold energy is accumulated while defrosting, the cold energy generated in the defrosting mode is stored in the cold accumulator 50, and the part of cold energy is used for improving the supercooling degree of the refrigerant before throttling by the first throttling device 41 in the refrigerating mode, so that the refrigerating capacity is increased, and the refrigerating efficiency after defrosting is improved. The defrosting efficiency of the defrosting system provided by the scheme is higher than that of electric heating defrosting, and the heat of the refrigerant is released from inside to outside by utilizing the condensation heat principle, so that the heat is sufficient, defrosting is fast, and the temperature rise of the chamber is small.

In other alternative embodiments, the system further comprises a check valve disposed between the condenser 20 and the regenerator 50, the check valve being in flow direction from the outlet of the condenser 20 to the accumulator.

In this way, when the ambient temperature is too low, under the second mode operation command, the high-pressure refrigerant in the evaporator 30 may migrate through the first throttling device 41, the first dry filter 61 and the cold accumulator 50 in the reverse direction to the condenser 20, thereby affecting the defrosting effect, and the one-way valve is provided to prevent the high-pressure refrigerant from migrating. In other embodiments, the check valve may also be disposed between the evaporator 30 and the first throttling device 41, or between the first throttling device 41 and the first dry filter 61, or between the first dry filter 61 and the cold accumulator 50.

In other alternative embodiments, the first restriction 41 comprises a first capillary tube and the second restriction 42 comprises a second capillary tube. In other embodiments, the first throttle 41 and the second throttle 42 may be electronic expansion valves.

In some alternative embodiments, the switch communication device 90 is a two-position, three-way valve. In other alternative embodiments, the switching communication device may also be a first electromagnetic valve and a second electromagnetic valve which are arranged in parallel, one end of the first electromagnetic valve and one end of the second electromagnetic valve are connected in parallel and then connected to the exhaust port of the compressor 10, and the other end of the first electromagnetic valve is connected to the inlet of the condenser 20; the other end of the second electromagnetic valve is connected with the defrosting pipe 34 of the water pan.

FIG. 3 is a schematic structural view of a defrosting system according to another exemplary embodiment; fig. 4 is a schematic structural diagram of the control device 100 of the defrosting system shown in fig. 3.

As shown in fig. 3, the defrosting system provided in this embodiment is applied to a refrigerator, and includes a compressor 10, a condenser 20, and an evaporator 30, where the evaporator 30 is provided with a fan 33, and the evaporator 30 includes a refrigeration pipeline 31 and a defrosting pipeline 32; the system further comprises a switching communication device 90 and a regenerator 50;

the first interface of the switching communication device 90 is connected to the exhaust port of the compressor 10, the second interface is connected to the inlet of the condenser 20, and the third interface is connected to the defrosting pipeline 32 of the evaporator 30 through the defrosting pan pipe 34;

a supercooling coil 51 and a cold accumulation coil 52 are arranged in the cold accumulator 50, one end of the supercooling coil 51 is connected with the outlet of the condenser 20, the other end of the supercooling coil is connected with the refrigeration pipeline 31 of the evaporator 30 through a first dry filter 61 and a first throttling device 41, and the other end of the refrigeration pipeline 31 is connected with the air suction port of the compressor 10 through a liquid storage bag 70; one end of the cold accumulation coil 52 is connected to the defrosting pipeline 32 of the evaporator 30 through the second throttling device 42 and the second dry filter 62, and the other end is connected to the air suction port of the compressor 10 through the liquid storage bag 70.

Optionally, the control device 100 is further included, configured to execute the operation instruction; as shown in fig. 4, the control device 100 includes:

a first unit 101 for controlling the switching communication device 90 according to the operating command;

a third unit 103, configured to control the fan 33 according to the operation instruction.

Optionally, the control device 100 is specifically configured to:

when the operation instruction is a first mode operation instruction, the first unit 101 controls the first interface and the second interface of the switching communication device 90 to be conducted, and the third unit 103 controls the fan 33 to operate;

when the operation command is a second mode operation command, the first unit 101 controls the first interface and the third interface of the switching communication device 90 to be conducted, and the third unit 103 controls the blower 33 to stop rotating.

Thus, under the first mode operation command, the first port and the second port of the switching communication device 90 are conducted, and the fan 33 is operated. At this time, the refrigerant is discharged from the discharge pipe of the compressor 10, enters the condenser 20 through the switching communication device 90, is discharged from the outlet of the condenser 20, enters the tube cooling coil of the cold accumulator 50, enters the first dry filter 61 after being cooled, enters the refrigeration pipeline 31 of the evaporator 30 after being throttled by the first throttling device 41, enters the liquid storage pack 70 through the pipeline, and returns to the air suction port of the compressor 10. Here, the refrigerant discharged from the outlet of the condenser 20 is cooled by the phase change regenerator material in the regenerator 50 while passing through the subcooling coil 51 in the regenerator 50, and the degree of subcooling of the refrigerant increases. Optionally, when the phase-change cold storage material is ice water, the ice water is cooled to cool the supercooling coil 51. Therefore, the refrigerating capacity is increased, and the refrigerating efficiency after defrosting is improved.

Under the second mode operation instruction, the first interface and the third interface of the switching communication device 90 are conducted, and the fan 33 is stopped. At this time, after being discharged from the discharge pipe of the compressor 10, the refrigerant enters the defrosting pan pipe 34 through the switching communication device 90, enters the defrosting pipe 32 of the evaporator 30, enters the cold storage coil 52 of the cold storage device 50 through the second dry filter 62 and the second throttling device 42, and then returns to the compressor air inlet through the liquid storage pack 70. Wherein, the high-temperature and high-pressure refrigerant discharged from the compressor 10 passes through the defrosting pipe 34 of the water pan and the evaporator 30 to be condensed and release heat, and the released heat is used for defrosting; meanwhile, the refrigerant throttled and cooled by the second throttling device 42 enters the cold storage coil 52 of the cold storage device 50, and the cold energy is stored in the phase change cold storage material in the cold storage device 50. Optionally, when the phase change cold storage material is ice water, the ice is formed by the water.

In the second mode, namely, the defrosting mode, the utilized heat comes from the condensation heat, the cold accumulator 50 accumulates cold while defrosting, and the accumulated cold is used for cooling the refrigerant at the outlet of the condenser 20 in the refrigerating mode, so that the efficiency is improved, and the energy is saved compared with the electric heating mode; in addition, the defrosting is from inside to outside, and compared with electric heating, the heat loss is less, and the temperature rise amplitude of the compartment is reduced.

By adopting the scheme, the condensation heat of the refrigerating system is utilized to defrost, the cold energy is accumulated while defrosting, the cold energy generated in the defrosting mode is stored in the cold accumulator 50, and the part of cold energy is used for improving the supercooling degree of the refrigerant before throttling by the first throttling device 41 in the refrigerating mode, so that the refrigerating capacity is increased, and the refrigerating efficiency after defrosting is improved. In the scheme, a finned tube evaporator 30 with a refrigeration pipeline 31 and a defrosting pipeline 32 is used, and the refrigeration pipeline 31 and the defrosting pipeline 32 are both in contact with fins. The defrosting efficiency of the defrosting system provided by the scheme is higher than that of electric heating defrosting, and the heat of the refrigerant is released from inside to outside by utilizing the condensation heat principle, so that the heat is sufficient, defrosting is fast, and the temperature rise of the chamber is small.

Compared with the defrosting system shown in fig. 1, the defrosting system in the present embodiment uses the finned tube evaporator 30 having the defrosting pipeline 32 and the refrigerating pipeline 31, so that the refrigerant forms a double loop when flowing through the evaporator 30, and replaces the solenoid valve 80 in the system shown in fig. 1, thereby reducing the number of control pipelines, and being more convenient and energy-saving.

In other alternative embodiments, the system further comprises a check valve disposed between the condenser 20 and the regenerator 50, the check valve being in flow direction from the outlet of the condenser 20 to the accumulator.

In this way, when the ambient temperature is too low, under the second mode operation command, the high-pressure refrigerant in the evaporator 30 may migrate through the first throttling device 41, the first dry filter 61 and the cold accumulator 50 in the reverse direction to the condenser 20, thereby affecting the defrosting effect, and the one-way valve is provided to prevent the high-pressure refrigerant from migrating. In other embodiments, the check valve may also be disposed between the evaporator 30 and the first throttling device 41, or between the first throttling device 41 and the first dry filter 61, or between the first dry filter 61 and the cold accumulator 50.

In other alternative embodiments, the first restriction 41 comprises a first capillary tube and the second restriction 42 comprises a second capillary tube. In other embodiments, the first throttle 41 and the second throttle 42 may be electronic expansion valves.

In some alternative embodiments, the switch communication device 90 is a two-position, three-way valve. In other alternative embodiments, the switching communication device may also be a first electromagnetic valve and a second electromagnetic valve which are arranged in parallel, one end of the first electromagnetic valve and one end of the second electromagnetic valve are connected in parallel and then connected to the exhaust port of the compressor 10, and the other end of the first electromagnetic valve is connected to the inlet of the condenser 20; the other end of the second electromagnetic valve is connected with the defrosting pipe 34 of the water pan.

The embodiment of the disclosure also provides a refrigerator, which comprises the defrosting system. When the refrigerator is defrosted, the heat of the refrigerant is utilized to defrost from inside to outside, the defrosting efficiency is higher than the electric heating defrosting efficiency, the heat of the refrigerant is utilized to defrost from inside to outside in a condensation heat principle, the heat is sufficient, the defrosting is fast, and the temperature rise of the adjacent chambers is small.

The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.