WO2020143777A1 - Defrosting system and refrigerator - Google Patents

Abstract

A defrosting system, applied in a refrigerator, and comprising a compressor (10), a condenser (20), and an evaporator (30). A fan (33) is provided on the evaporator (30). The defrosting system further comprises a communication-switching device (90) and a regenerator (50). A first port of the communication-switching device (90) is connected to a gas outlet of the compressor (10), a second port is connected to an inlet of the condenser (20), and a third port is connected to a defrostation water tray and defrosting pipe (34) thereof. A sub-cooling coil (51) and a cold-accumulator coil (52) are provided in the regenerator (50). One end of the sub-cooling coil (51) is connected to an outlet of the condenser (20), and the other end is connected to a gas inlet of the evaporator (30) by means of a first filter drier (61) and a first throttling device (41). One end of the cold-accumulator coil (52) is connected to a gas outlet of the evaporator (30) by means of a second throttling device (42) and a second filter drier (62), and the other end is connected to a gas suction inlet of the compressor (10) by means of a liquid storage container (70). The gas outlet of the evaporator (30) is further connected to a solenoid valve (80) and the liquid storage container (70). The defrosting system of the technical solution employs the principle of heat of condensation to achieve rapid defrosting, resulting in minimal compartment temperature rise, and highly efficient defrosting.

Description

Defrosting system and refrigerator

This application is based on the Chinese patent application with the application number of 201910027069.6 and the application date of January 11, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

Technical field

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

Background technique

As a container that can keep food or other items at a constant low temperature, the refrigerator has become one of the indispensable household appliances in modern households.

At present, most of the refrigerator defrosting uses the electric heating method, but on the one hand, this method takes a long time and the energy consumption is high; on the other hand, a large amount of heat enters the other rooms of the refrigerator during defrosting, causing a room that does not require defrosting The chamber temperature increased significantly. Therefore, the defrosting method urgently needs improvement.

Summary of the invention

Embodiments of the present invention provide a defrosting system and a refrigerator to solve the problems in the prior art that electric heating defrosting affects normal cooling of other compartments and high energy consumption. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary section is not a general comment, nor is it to determine key/important constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

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

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

The cold storage is provided with a supercooling coil and a cold storage coil, one end of the supercooling coil is connected to the outlet of the condenser, and the other end is connected to the intake port of the evaporator through a first throttle device; One end of the cold storage coil is connected to the outlet port of the evaporator through a second throttle device, and the other end is connected to the suction port of the compressor;

The outlet port of the evaporator is also connected to the suction port of the compressor through a solenoid valve;

When the defrosting system is cooling, the first interface of the switching communication device communicates with the second interface, and the solenoid valve opens;

When the defrosting system performs defrosting, the first interface of the switching link device communicates with the third interface, and the solenoid valve is closed.

In some optional embodiments, an evaporator water tray defrost tube is also connected in series between the third interface and the evaporator.

In some optional embodiments, it further includes a control device for executing an operation instruction; the control device includes: a first unit for controlling the switching and connecting device according to the operation instruction; and a second unit for The operation command controls the solenoid valve; a third unit is used to control the fan according to the operation command.

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

When the operation command is a first mode operation command, the first unit controls the first interface and the second interface of the switching and connecting device to conduct, the second unit controls the solenoid valve to open, and the third The unit controls the operation of the fan;

When the operation command is a second mode operation command, the first unit controls the first interface and the third interface of the switching and connecting device to conduct, the second unit controls the solenoid valve to close, and the third The unit controls the fan to stop.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: A defrosting system provided by the present solution utilizes the condensation heat of a refrigeration system to defrost, defrosting while accumulating cooling capacity, and the cooling capacity generated by the defrosting mode Stored in the regenerator, in the cooling mode, this part of the cooling capacity is used to increase the refrigerant supercooling degree before the throttling of the first throttle device, thereby increasing the cooling capacity and improving the refrigeration efficiency after defrosting. The defrosting system provided by this solution has a higher defrosting efficiency than electric heating defrosting. Using the principle of condensation heat, the heat of the refrigerant is released from the inside out, the heat is sufficient, the defrosting is fast, and the room temperature rise is small.

In some optional embodiments, a phase-change cold storage material is also provided in the cold storage for storing cold energy. Optionally, the phase change cold storage material is ice water.

In some optional embodiments, a check valve is provided between the condenser and the cold accumulator, and the flow direction of the check valve is from the outlet of the condenser to the liquid reservoir.

The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: When the ambient temperature is too low, under the second mode operation command, the high-pressure refrigerant in the evaporator may pass through the first throttling device, the first drying filter, The cold accumulator migrates in the reverse direction to the condenser, which affects the defrosting effect. By setting the one-way valve, this phenomenon can be prevented. In other embodiments, the one-way valve may also be provided between the evaporator and the first throttle device, or between the first throttle device and the first drying filter, or the first Between a filter drier and the cold storage. The defrosting system provided by this solution has a higher defrosting efficiency than electric heating defrosting. Using the principle of condensation heat, the heat of the refrigerant is released from the inside out, the heat is sufficient, the defrosting is fast, and the room temperature rise is small.

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

In some optional embodiments, the switching communication device is a two-position three-way valve. In other optional embodiments, the two-loop communication device may also be a first solenoid valve and a second solenoid valve arranged in parallel. One end of the first solenoid valve and the second solenoid valve are connected in parallel to the compressor For the exhaust port, the other end of the first solenoid valve is connected to the inlet of the condenser; the other end of the second solenoid valve is connected to the defrosting tube of the water receiving tray.

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

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

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

The regenerator is provided with a supercooling coil and a cold storage coil, one end of the supercooling coil is connected to the outlet of the condenser, and the other end is connected to the refrigeration line of the evaporator through a first throttling device, The other end of the refrigeration pipeline is connected to the suction port of the compressor; one end of the cold storage coil is connected to the defrosting pipeline of the evaporator through a second throttle device, and the other end is connected to the compressor Suction port

When the defrosting system is cooling, the first interface of the switching communication device communicates with the second interface;

When the defrosting system performs defrosting, the first interface of the switching link device communicates with the third interface.

In some optional embodiments, an evaporator water tray defrosting tube is also connected in series between the third interface and the evaporator.

In some optional embodiments, it further includes a control device for executing an operation instruction; the control device includes:

A first unit for controlling the switching and connecting device according to the operation instruction;

The third unit is used to control the fan according to the operation instruction.

In some optional embodiments, the control device is specifically used 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 and connecting device to be connected, and the third unit controls the operation of the fan;

When the operation command is a second mode operation command, the first unit controls the first interface and the third interface of the switching and connecting device to conduct, and the third unit controls the fan to stop.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: A defrosting system provided by the present solution utilizes the condensation heat of a refrigeration system to defrost, defrosting while accumulating cooling capacity, and the cooling capacity generated by the defrosting mode Stored in the regenerator, in the cooling mode, this part of the cooling capacity is used to increase the refrigerant supercooling degree before the throttling of the first throttle device, thereby increasing the cooling capacity and improving the refrigeration efficiency after defrosting. In this solution, a finned tube evaporator with a refrigeration line and a defrost line is used, and both the refrigeration line and the defrost line are in contact with the fins. The defrosting system provided by this solution has a higher defrosting efficiency than electric heating defrosting. Using the principle of condensation heat, the heat of the refrigerant is released from the inside out, the heat is sufficient, the defrosting is fast, and the room temperature rise is small.

In some optional embodiments, a check valve is provided between the condenser and the cold accumulator, and the flow direction of the check valve is from the outlet of the condenser to the liquid reservoir.

The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: When the ambient temperature is too low, under the second mode operation command, the high-pressure refrigerant in the evaporator may pass through the first throttling device, the first drying filter, The cold accumulator migrates in the reverse direction to the condenser, which affects the defrosting effect. By setting the one-way valve, this phenomenon can be prevented. In other embodiments, the one-way valve may also be provided between the evaporator and the first throttle device, or between the first throttle device and the first drying filter, or the first Between a filter drier and the cold storage. The defrosting system provided by this solution has a higher defrosting efficiency than electric heating defrosting. Using the principle of condensation heat, the heat of the refrigerant is released from the inside out, the heat is sufficient, the defrosting is fast, and the room temperature rise is small.

It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present invention.

BRIEF DESCRIPTION

The drawings here are incorporated into and constitute a part of this specification, show embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

Fig. 1 is a schematic structural diagram of a defrosting system according to an exemplary embodiment;

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

Fig. 3 is a schematic structural diagram of a defrosting system according to another exemplary embodiment;

FIG. 4 is a schematic structural view of the control device of the defrosting system shown in FIG. 3.

detailed description

The following description and drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, and do not require or imply any actual relationship or order between these elements. In fact the first element can also be called the second element and vice versa. Moreover, the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a structure, device, or device that includes a series of elements includes not only those elements, but also others that are not explicitly listed Elements, or include elements inherent to such structures, devices, or equipment. Without more restrictions, the element defined by the sentence "including one..." does not exclude that there are other identical elements in the structure, device or equipment that includes the element. The embodiments in this document are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other.

The terms "portrait", "landscape", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "herein" The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing this text and simplifying the description, and does not indicate or imply that the device or element referred to must It has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In the description herein, unless otherwise specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it may be a mechanical connection or an electrical connection, or it may be the communication between two elements, It may be directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific situations.

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

In this article, the character "/" indicates that the front and back objects are in an "or" relationship. For example, A/B means: A or B.

In this article, the term "and/or" refers to an association relationship describing an object, indicating that there may be three types of relationship. For example, A and/or B means: A or B, or, A and B

Fig. 1 is a schematic structural diagram of a defrosting system according to an exemplary embodiment; Fig. 2 is a schematic structural diagram of a control device of the defrosting system shown in Fig. 1.

As shown in FIG. 1, a defrosting system provided by this embodiment is applied to a refrigerator, and includes a compressor 10, a condenser 20, and an evaporator 30. The evaporator 30 is provided with a fan 33, and further includes a switching communication device 90 and cold storage 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 water tray defrosting tube 34; the cold storage The supercooling coil 51 and the cold storage coil 52 are provided in the condenser 50. One end of the supercooling coil 51 is connected to the outlet of the condenser 20, and the other end is connected to the first dryer filter 61 and the first throttling device 41. The inlet port of the evaporator 30; one end of the cold storage coil 52 is connected to the outlet port of the evaporator 30 through the second throttle device 42 and the second drying filter 62, and the other end is connected to the compressor 10 through the liquid storage bag 70 The suction port of the evaporator 30 is also connected to the solenoid valve 80 to the liquid storage bag 70.

Optionally, it further includes a control device 100 for executing an operation instruction; as shown in FIG. 2, the control device 100 includes: a first unit 101 for controlling the switching and connecting device 90 according to the operation instruction; and a second unit 102 Is used to control the solenoid valve 80 according to the operation instruction; the third unit 103 is used to control the fan 33 according to the operation instruction.

Optionally, the control device 100 is specifically configured to: when the operation command is a first mode operation command, the first unit 101 controls the first interface and the second interface of the switching and connecting device 90 to be connected, and the second unit 102 Control the solenoid valve 80 to open, 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 and connecting device 90 to conduct, the second unit 102 controls the solenoid valve 80 to close, and the third unit 103 The fan 33 is controlled to stop.

In this way, under the first mode operation command, the first interface and the second interface of the switching communication device 90 are conducted, the solenoid valve 80 is opened, and the fan 33 is operated. At this time, after the refrigerant is discharged from the exhaust pipe of the compressor 10, it enters the condenser 20 through the switching communication device 90, and is discharged from the outlet of the condenser 20 and enters the tube cold coil of the regenerator 50. After cooling, it enters the first dry filter After being throttled by the first throttle device 41, the compressor 61 enters the evaporator 30, enters the liquid storage bag 70 through the pipeline, and then returns to the suction port of the compressor 10. Among them, the refrigerant discharged from the outlet of the condenser 20 is cooled by the phase change cold storage material in the regenerator 50 when passing through the supercooling coil 51 in the regenerator 50, and the degree of refrigerant supercooling increases. Optionally, when the phase change cold storage material is ice water, the supercooled coil 51 is iced into water and cooled at this time. In this way, it is helpful to increase the cooling capacity and improve the cooling efficiency after defrosting.

Under the second mode operation command, the first interface and the third interface of the switching and connecting device 90 are connected, the solenoid valve 80 is closed, and the fan 33 is stopped. At this time, after the refrigerant is discharged from the exhaust pipe of the compressor 10, it enters the water-receiving tray defrost pipe 34 through the switching communication device 90, then enters the evaporator 30, passes through the second drying filter 62, and the second throttle device 42 After entering the cold storage coil 52 of the cold storage 50, it returns to the compressor suction port through the liquid storage bag 70. Among them, the high-temperature and high-pressure refrigerant discharged from the compressor 10 passes through the water receiving tray defrosting tube 34 and the evaporator 30 to condense and release heat, and the released heat is used for defrosting; at the same time, it passes through the second throttling device 42 The refrigerant whose flow has decreased in temperature enters the cold storage coil 52 of the cold storage 50 and stores the amount of cold in the phase change cold storage material in the cold storage 50. Optionally, when the phase change cold storage material is ice water, the water freezes at this time.

In this second mode, the defrosting mode, the heat used comes from the heat of condensation. At the same time of defrosting, the regenerator 50 is also storing cold. The accumulated cold is used to cool the outlet of the condenser 20 in the cooling mode. The agent improves efficiency, so it is more energy-efficient than electric heating. In addition, defrosting is defrosting from the inside out. Compared with electric heating, it loses less heat and the room temperature rise is reduced.

Using the above scheme, the condensation heat of the refrigeration system is used to defrost, and the defrost is stored with cold. The cold generated in the defrosting mode is stored in the regenerator 50. In the cooling mode, this part of the cold is used to increase the first The throttling device 41 supercools the refrigerant before throttling, thereby increasing the cooling capacity and improving the refrigeration efficiency after defrosting. The defrosting system provided by this solution has a higher defrosting efficiency than electric heating defrosting. Using the principle of condensation heat, the heat of the refrigerant is released from the inside out, the heat is sufficient, the defrosting is fast, and the room temperature rise is small.

In other optional embodiments, the system further includes a one-way valve disposed between the condenser 20 and the cold storage 50, and the flow direction of the one-way valve is from the outlet of the condenser 20 to the reservoir.

As such, when the ambient temperature is too low, under the second mode operation command, the high-pressure refrigerant in the evaporator 30 may pass through the first throttling device 41, the first drying filter 61, and the regenerator 50 to the condenser 20 in the reverse direction. Medium migration affects the defrosting effect. By setting the one-way valve, this phenomenon can be prevented. In other embodiments, the one-way valve may also be provided between the evaporator 30 and the first throttle device 41, or between the first throttle device 41 and the first drying filter 61, or the first Between a drying filter 61 and the regenerator 50.

In other optional embodiments, the first throttle device 41 includes a first capillary tube, and the second throttle device 42 includes a second capillary tube. In other embodiments, the first throttle device 41 and the second throttle device 42 may also be electronic expansion valves.

In some optional embodiments, the switching communication device 90 is a two-position three-way valve. In other optional embodiments, the switching communication device may also be a first solenoid valve and a second solenoid valve arranged in parallel, and one end of the first solenoid valve and the second solenoid valve are connected in parallel to the exhaust port of the compressor 10 , The other end of the first solenoid valve is connected to the inlet of the condenser 20; the other end of the second solenoid valve is connected to the water tray defrosting tube 34.

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

As shown in FIG. 3, a defrosting system provided in this embodiment is applied to a refrigerator, and includes a compressor 10, a condenser 20, and an evaporator 30. The evaporator 30 is provided with a fan 33, and the evaporator 30 includes Refrigeration pipeline 31 and defrosting pipeline 32; the system also includes a switching communication device 90 and a cold storage 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 tube of the evaporator 30 through a water tray defrosting tube 34 Road 32;

The cold storage 50 is provided with a supercooling coil 51 and a cold storage coil 52, one end of the supercooling coil 51 is connected to the outlet of the condenser 20, and the other end passes through the first drying filter 61 and the first throttle device 41 The refrigeration line 31 of the evaporator 30 is connected, and the other end of the refrigeration line 31 is connected to the suction port of the compressor 10 through a liquid storage bag 70; one end of the cold storage coil 52 passes through the second throttle device 42 and the first The second drying filter 62 is connected to the defrosting line 32 of the evaporator 30, and the other end is connected to the suction port of the compressor 10 through a liquid storage bag 70.

Optionally, it also includes a control device 100, which is used to execute an operation instruction; as shown in FIG. 4, the control device 100 includes:

The first unit 101 is used to control the switching and connecting device 90 according to the operation instruction;

The third unit 103 is used to control the fan 33 according to the operation instruction.

Optionally, the control device 100 is specifically used for:

When the operation command is a first mode operation command, the first unit 101 controls the first interface and the second interface of the switching and connecting device 90 to be connected, and the third unit 103 controls the operation of the fan 33;

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 and connecting device 90 to conduct, and the third unit 103 controls the fan 33 to stop.

In this way, under the first mode operation command, the first interface and the second interface of the switching and connecting device 90 are conducted, and the fan 33 operates. At this time, after the refrigerant is discharged from the exhaust pipe of the compressor 10, it enters the condenser 20 through the switching communication device 90, and is discharged from the outlet of the condenser 20 and enters the tube cold coil of the regenerator 50. After cooling, it enters the first dry filter After being throttled by the first throttle device 41, the compressor 61 enters the refrigeration line 31 of the evaporator 30, enters the liquid storage bag 70 through the pipeline, and then returns to the suction port of the compressor 10. Among them, the refrigerant discharged from the outlet of the condenser 20 is cooled by the phase change cold storage material in the regenerator 50 when passing through the supercooling coil 51 in the regenerator 50, and the degree of refrigerant supercooling increases. Optionally, when the phase change cold storage material is ice water, the supercooled coil 51 is iced into water and cooled at this time. In this way, it is helpful to increase the cooling capacity and improve the cooling efficiency after defrosting.

Under the second mode operation instruction, the first interface and the third interface of the switching and connecting device 90 are connected, and the fan 33 stops. At this time, after the refrigerant is discharged from the exhaust pipe of the compressor 10, it enters the defrosting pipe 34 of the water receiving tray through the switching communication device 90, then enters the defrosting pipe 32 of the evaporator 30, passes through the second drying filter 62, The second throttle device 42 enters the cold storage coil 52 of the cold storage 50 and then returns to the compressor suction port through the liquid storage bag 70. Among them, the high-temperature and high-pressure refrigerant discharged from the compressor 10 passes through the water receiving tray defrosting tube 34 and the evaporator 30 to condense and release heat, and the released heat is used for defrosting; at the same time, it passes through the second throttling device 42 The refrigerant whose flow has decreased in temperature enters the cold storage coil 52 of the cold storage 50 and stores the amount of cold in the phase change cold storage material in the cold storage 50. Optionally, when the phase change cold storage material is ice water, the water freezes at this time.

In this second mode, the defrosting mode, the heat used comes from the heat of condensation. At the same time of defrosting, the regenerator 50 is also storing cold. The accumulated cold is used to cool the outlet of the condenser 20 in the cooling mode. The agent improves efficiency, so it is more energy-efficient than electric heating. In addition, defrosting is defrosting from the inside out. Compared with electric heating, it loses less heat and the room temperature rise is reduced.

Using the above scheme, the condensation heat of the refrigeration system is used to defrost, and the defrost is stored with cold. The cold generated in the defrosting mode is stored in the regenerator 50. In the cooling mode, this part of the cold is used to increase the first The throttling device 41 supercools the refrigerant before throttling, thereby increasing the cooling capacity and improving the refrigeration efficiency after defrosting. In this solution, a finned tube evaporator 30 having a refrigeration line 31 and a defrost line 32 is used, and both the refrigeration line 31 and the defrost line 32 are in contact with the fins. The defrosting system provided by this solution has a higher defrosting efficiency than electric heating defrosting. Using the principle of condensation heat, the heat of the refrigerant is released from the inside out, the heat is sufficient, the defrosting is fast, and the room temperature rise is small.

Compared with the defrosting system shown in FIG. 1, the defrosting system in this embodiment uses a finned tube evaporator 30 having a defrosting line 32 and a cooling line 31 so that the refrigerant flows through the evaporator 30 When forming a double circuit, the solenoid valve 80 in the system shown in FIG. 1 is replaced, which reduces the control pipeline, which is more convenient and energy-saving.

In other optional embodiments, the system further includes a one-way valve disposed between the condenser 20 and the cold storage 50, and the flow direction of the one-way valve is from the outlet of the condenser 20 to the reservoir.

As such, when the ambient temperature is too low, under the second mode operation command, the high-pressure refrigerant in the evaporator 30 may pass through the first throttling device 41, the first drying filter 61, and the regenerator 50 to the condenser 20 in the reverse direction. Medium migration affects the defrosting effect. By setting the one-way valve, this phenomenon can be prevented. In other embodiments, the one-way valve may also be provided between the evaporator 30 and the first throttle device 41, or between the first throttle device 41 and the first drying filter 61, or the first Between a drying filter 61 and the regenerator 50.

In other optional embodiments, the first throttle device 41 includes a first capillary tube, and the second throttle device 42 includes a second capillary tube. In other embodiments, the first throttle device 41 and the second throttle device 42 may also be electronic expansion valves.

In some optional embodiments, the switching communication device 90 is a two-position three-way valve. In other optional embodiments, the switching communication device may also be a first solenoid valve and a second solenoid valve arranged in parallel, and one end of the first solenoid valve and the second solenoid valve are connected in parallel to the exhaust port of the compressor 10 , The other end of the first solenoid valve is connected to the inlet of the condenser 20; the other end of the second solenoid valve is connected to the water tray defrosting tube 34.

An embodiment of the present disclosure also provides a refrigerator including the above-mentioned defrosting system. When the refrigerator is defrosting, the heat of the refrigerant is used to defrost from the inside to the outside, the defrosting efficiency is higher than the electric heating defrosting efficiency, and the heat of the refrigerant is used from the inside to the outside, the heat is sufficient, and the defrosting is fast. , The room temperature rise between adjacent rooms is small.

The present invention is not limited to the structure that has 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 only limited by the appended claims.

Claims (10)

1. A defrosting system, applied to a refrigerator, includes a compressor, a condenser, and an evaporator, the evaporator is provided with a fan, and is characterized in that it further includes a switching communication device and a cold storage;

   The first interface of the switching communication device is connected to the exhaust port of the compressor, the second interface is connected to the inlet of the condenser, and the third interface is connected to the inlet port of the evaporator;

   The cold storage is provided with a supercooling coil and a cold storage coil, one end of the supercooling coil is connected to the outlet of the condenser, and the other end is connected to the intake port of the evaporator through a first throttle device; One end of the cold storage coil is connected to the outlet port of the evaporator through a second throttle device, and the other end is connected to the suction port of the compressor;

   The outlet port of the evaporator is also connected to the suction port of the compressor through a solenoid valve;

   When the defrosting system is cooling, the first interface of the switching communication device communicates with the second interface, and the solenoid valve opens;

   When the defrosting system performs defrosting, the first interface of the switching link device communicates with the third interface, and the solenoid valve is closed.
2. The defrosting system according to claim 1, further comprising a control device for executing an operation instruction; the control device includes:

   A first unit for controlling the switching and connecting device according to the operation instruction;

   A second unit for controlling the solenoid valve according to the operation instruction;

   The third unit is used to control the fan according to the operation instruction.
3. The defrosting system according to claim 2, wherein the control device is specifically used to:

   When the operation command is a first mode operation command, the first unit controls the first interface and the second interface of the switching and connecting device to conduct, the second unit controls the solenoid valve to open, and the third The unit controls the operation of the fan;

   When the operation command is a second mode operation command, the first unit controls the first interface and the third interface of the switching and connecting device to conduct, the second unit controls the solenoid valve to close, and the third The unit controls the fan to stop.
4. The defrosting system according to claim 1, wherein a check valve is provided between the condenser and the cold storage, and the flow direction of the check valve is from the outlet of the condenser to the Reservoir.
5. The defrosting system of claim 1, wherein the first throttle device includes a first capillary tube and the second throttle device includes a second capillary tube.
6. The defrosting system according to claim 1, wherein the switching communication device is a two-position three-way valve.
7. A defrosting system, applied to a refrigerator, includes a compressor, a condenser, and an evaporator, the evaporator is provided with a fan, and is characterized in that the evaporator includes a refrigeration pipeline and a defrosting pipeline; the system also Including switching communication device and cold storage;

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

   The regenerator is provided with a supercooling coil and a cold storage coil, one end of the supercooling coil is connected to the outlet of the condenser, and the other end is connected to the refrigeration line of the evaporator through a first throttling device, The other end of the refrigeration pipeline is connected to the suction port of the compressor; one end of the cold storage coil is connected to the defrosting pipeline of the evaporator through a second throttle device, and the other end is connected to the compressor Suction port

   When the defrosting system is cooling, the first interface of the switching communication device communicates with the second interface;

   When the defrosting system performs defrosting, the first interface of the switching link device communicates with the third interface.
8. The defrosting system according to claim 7, further comprising a control device for executing an operation instruction; the control device includes:

   A first unit for controlling the switching and connecting device according to the operation instruction;

   The third unit is used to control the fan according to the operation instruction.
9. The defrosting system according to claim 8, wherein the control device is specifically used 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 and connecting device to be connected, and the third unit controls the operation of the fan;

   When the operation command is a second mode operation command, the first unit controls the first interface and the third interface of the switching and connecting device to conduct, and the third unit controls the fan to stop.
10. A refrigerator, characterized by comprising the defrosting system according to any one of claims 1 to 9.

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