An auxiliary heat dissipation system and a refrigerator

Abstract

This invention provides an auxiliary heat dissipation system and a refrigerator, belonging to the field of refrigerator heat dissipation technology. The auxiliary heat dissipation system includes: a solenoid valve and a compressor heat dissipation branch, an evaporator heat dissipation branch, an external heat dissipation branch, and an external heat dissipation device for circulating the heat exchange medium; the compressor heat dissipation branch is in contact with the refrigerator's compressor or compressor compartment; the evaporator heat dissipation branch is in contact with the refrigerator's evaporator; the external heat dissipation device is located in the environment outside the refrigerator and is connected to the external heat dissipation branch; the solenoid valve is connected to the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch, and is used to control the connection and disconnection between any two of the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch. This invention also provides a refrigerator including the auxiliary heat dissipation system. The auxiliary heat dissipation system and refrigerator of this invention can reduce power consumption and noise.

Description

Technical Field

[0001] This invention relates to the field of refrigerator heat dissipation technology, and in particular to an auxiliary heat dissipation system and a refrigerator. Background Technology

[0002] During refrigerator operation, the heat generated by the compressor can cause the compressor compartment temperature to become excessively high. In summer, temperatures are even higher, causing the entire compressor compartment temperature to be significantly higher than the ambient temperature. For refrigerators equipped with microchannel condensers, the high compressor compartment temperature is due not only to the heat generated by the compressor itself but also to the heat from the microchannel condenser. Although natural heat exchange or forced heat exchange via the compressor compartment fan can help, the temperature remains high during refrigerator operation, significantly exceeding the ambient temperature. Furthermore, forced heat exchange via the fan results in increased refrigerator noise and higher energy consumption. Excessive compressor compartment temperature is detrimental to energy efficiency and negatively impacts the lifespan of the inverter board and its starting performance.

[0003] After running for a period of time, a frost-free refrigerator enters a defrosting state. During this time, the refrigeration system stops operating, the fan and damper close, and the heating element is powered on. The heating element generates temperatures of 200-300 degrees Celsius, melting the frost adhering to the evaporator, thus achieving defrosting. The operation of the heating element causes the refrigerator's operating power to reach 2 to 3 times its stable operating power. Power consumption equals power multiplied by time, resulting in a sharp increase in power consumption during defrosting. Simultaneously, during defrosting, the refrigerator does not cool, and the temperature inside the evaporator is high. After defrosting ends, normal cooling requires more power than during stable operation to lower the temperature of the evaporator and the refrigerator / freezer compartments to the specified range. This process continues in a loop, and the large amount of energy consumed is detrimental to energy conservation and emission reduction. Summary of the Invention

[0004] One objective of the first aspect of this invention is to provide an auxiliary heat dissipation system that can reduce power consumption and noise.

[0005] A further objective of this invention is to improve heat dissipation efficiency.

[0006] A further objective of this invention is to improve the defrosting efficiency of the evaporator.

[0007] A second aspect of the present invention aims to provide a refrigerator for implementing the above-described auxiliary heat dissipation system, which can reduce power consumption and noise.

[0008] In particular, the present invention provides an auxiliary heat dissipation system, comprising: a solenoid valve and a compressor heat dissipation branch, an evaporator heat dissipation branch, an external heat dissipation branch, and an external heat dissipation device for circulating heat exchange medium;

[0009] The compressor cooling branch is in contact with the refrigerator's compressor or compressor compartment;

[0010] The evaporator heat dissipation branch is in contact with the evaporator of the refrigerator;

[0011] The external heat dissipation device is located in the environment outside the refrigerator and is connected to the external heat dissipation branch.

[0012] The solenoid valve is connected to the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch, and is used to control the connection and disconnection between any two of the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch.

[0013] Optionally, the compressor heat dissipation branch is attached to the outer surface of the compressor or the outer surface of the compressor compartment.

[0014] Optionally, the evaporator heat dissipation branch is attached to the surface of the refrigerant pipe of the evaporator and the shell of the evaporator.

[0015] Optionally, the external heat dissipation device is a plate-shaped component, a mesh-shaped component, or a tubular component with a heat exchange medium flowing inside.

[0016] Optionally, the auxiliary cooling system may also include:

[0017] The condenser heat dissipation branch contacts the microchannel condenser of the refrigerator; and

[0018] The solenoid valve is also connected to the condenser heat dissipation branch and is used to control the connection and disconnection between any two of the compressor heat dissipation branch, the evaporator heat dissipation branch, the external heat dissipation branch and the condenser heat dissipation branch.

[0019] Optionally, the condenser heat dissipation branch includes a first heat dissipation part and a first connecting pipe. The first heat dissipation part is attached to the surface of the refrigerant pipe of the microchannel condenser and the shell of the microchannel condenser. The first connecting pipe is used to connect the first heat dissipation part and the solenoid valve.

[0020] Optionally, the first heat dissipation unit is assembled as a single unit with the microchannel condenser.

[0021] Optionally, the solenoid valve is used to connect the condenser heat dissipation branch and the external heat dissipation branch when the refrigerator is operating normally, and to connect the compressor heat dissipation branch and the external heat dissipation branch when the refrigerator is operating normally and the temperature of the compressor compartment is higher than the ambient temperature.

[0022] Optionally, the solenoid valve is used to connect the evaporator heat dissipation branch to the condenser heat dissipation branch and the compressor heat dissipation branch respectively before the refrigerator stops running and the evaporator defrosting heating wire is activated;

[0023] The solenoid valve is also used to connect the external heat dissipation branch to the evaporator heat dissipation branch when the ambient temperature is higher than the temperature of the evaporator.

[0024] In particular, the present invention also provides a refrigerator including the auxiliary heat dissipation system described in any of the above claims.

[0025] According to one embodiment of the present invention, by setting up a compressor heat dissipation branch that contacts the compressor or compressor compartment, an evaporator heat dissipation branch that contacts the evaporator, and an external heat dissipation device that contacts the outside air, and by setting up an electromagnetic valve for switching the connection relationship between the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch, it is possible to dissipate the heat of the compressor compartment into the environment during normal operation of the refrigerator, effectively dissipating heat from the compressor, eliminating the need for or reducing the use of the compressor compartment fan, thereby reducing the problems of high refrigerator noise and high power consumption caused by forced heat exchange of the fan, and also avoiding the problems of shortened lifespan of the inverter board and poor starting performance caused by excessively high compressor compartment temperature.

[0026] Furthermore, due to the above-described configuration in this embodiment, heat from the compressor can be transferred to the evaporator before the refrigerator enters defrost mode (defrosting via the evaporator defrost heating wire) to assist in defrosting. When the ambient temperature is higher than the evaporator temperature, heat from the air is further utilized to assist in defrosting, thereby saving energy used for heating the heating wire. This also minimizes or avoids the time the refrigerator spends in defrost mode, reducing energy consumption caused by the refrigerator resuming normal cooling after defrosting, which is beneficial for energy conservation and emission reduction.

[0027] According to one embodiment of the present invention, by setting four heat dissipation branches and one solenoid valve, heat dissipation of the compressor and condenser can be achieved individually and simultaneously. It can also create a state where the compressor and condenser simultaneously assist the evaporator in defrosting, or where the compressor, condenser, and external heat dissipation device simultaneously assist the evaporator in defrosting. The auxiliary heat dissipation system has a simple and easy-to-implement structure, rich functionality, and can effectively reduce the electrical energy and noise required for compressor heat dissipation, ensure that the compressor compartment is at a suitable temperature, and effectively reduce the use of evaporator defrosting heating wires, further reducing energy consumption and contributing to energy conservation and emission reduction.

[0028] According to one embodiment of the present invention, the condenser heat dissipation branch includes a first heat dissipation part and a first connecting pipe. The first connecting pipe is used to connect the first heat dissipation part and the solenoid valve. The first heat dissipation part is arranged in a serpentine shape wrapped around the refrigerant pipes of the microchannel condenser, thereby increasing the contact area between the first heat dissipation part and the microchannel condenser.

[0029] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0030] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0031] Figure 1 This is a schematic diagram of an auxiliary heat dissipation system according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the connection structure of an auxiliary heat dissipation system installed in a refrigerator according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the connection structure between the auxiliary heat dissipation system and the microchannel condenser according to another embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the first heat dissipation part of an auxiliary heat dissipation system according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of a refrigerator according to an embodiment of the present invention. Detailed Implementation

[0036] In the description of this embodiment, it should be understood that the terms "upper", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0037] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0039] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "coupling," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] Unless otherwise specified, all terms (including technical and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0042] Figure 1 This is a schematic diagram of the structure of an auxiliary heat dissipation system 100 according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the connection structure when an auxiliary heat dissipation system according to an embodiment of the present invention is installed in a refrigerator. Figure 2 External heat dissipation branch 40 and external heat dissipation device 50 are not shown. Figure 1 As shown, in one embodiment, the auxiliary heat dissipation system 100 includes a solenoid valve 10 and compressor heat dissipation branch 20, evaporator heat dissipation branch 30, external heat dissipation branch 40, and external heat dissipation device 50 for circulating the heat exchange medium. The heat exchange medium can be a coolant, such as water. Figure 2As shown, the compressor heat dissipation branch 20 is in contact with the refrigerator's compressor 201 or compressor compartment. In one embodiment, the compressor heat dissipation branch 20 is attached to the outer surface of the compressor 201 or the outer surface of the compressor compartment, maximizing the contact area to effectively transfer heat from the compressor 201 to the compressor heat dissipation branch 20. The evaporator heat dissipation branch 30 is in contact with the refrigerator's evaporator 202. In one embodiment, the evaporator heat dissipation branch 30 is attached to the surface of the refrigerant pipes of the evaporator 202 and the shell of the evaporator 202. Similarly, the evaporator heat dissipation branch 30 can be placed in contact with the evaporator 202 as much as possible for effective heat dissipation. The external heat dissipation device 50 is located in the environment outside the refrigerator, i.e., exposed to the air, and is connected to the external heat dissipation branch 40. Here, the external heat dissipation device 50 is a plate-shaped component, mesh-shaped component, or tubular component with an internal heat exchange medium, as long as it can form an effective heat exchange area with the air. Solenoid valve 10 is connected to compressor cooling branch 20, evaporator cooling branch 30, and external cooling branch 40, and is used to control the connection and disconnection between any two of these three branches. Solenoid valve 10 can be a controllable four-way valve with four ports. A specially designed main valve core engages with each of the four ports, and the on / off state of the four-way valve can be controlled by adjusting the movement of the main valve core. Alternatively, individual valve cores can be installed at each port to control the on / off state of each port, thus achieving various connection modes.

[0043] By controlling the connection state of the solenoid valve 10, the auxiliary heat dissipation system 100 of this embodiment can at least form the following operating conditions:

[0044] When the refrigerator is running normally, when the temperature of the compressor compartment (or compressor 201) is higher than the ambient temperature, the solenoid valve 10 connects the compressor heat dissipation branch 20 and the external heat dissipation branch 40. The heat exchange medium in the compressor heat dissipation branch 20 is heated and evaporates, then diffuses into the external heat dissipation branch 40.

[0045] Before the refrigerator stops running and the defrosting heating wire of the evaporator 202 is activated, the evaporator heat dissipation branch 30 is connected to the compressor heat dissipation branch 20. This is just before the refrigerator enters defrosting mode. At this time, the compressor 201 is generally quite hot, and the heat from the compressor 201 is transferred to the evaporator 202 through the heat exchange medium via the compressor heat dissipation branch 20, helping the evaporator 202 defrost. Furthermore, when the ambient temperature is higher than the temperature of the evaporator 202, the solenoid valve 10 can also connect the external heat dissipation branch 40 to the evaporator heat dissipation branch 30, thereby utilizing heat from the external environment to assist the evaporator 202 in defrosting.

[0046] In this embodiment, by setting up a compressor heat dissipation branch 20 that contacts the compressor 201 or compressor compartment, an evaporator heat dissipation branch 30 that contacts the evaporator 202, and an external heat dissipation device 50 that contacts the outside air, and by setting up a solenoid valve 10 for switching the connection relationship between the compressor heat dissipation branch 20, the evaporator heat dissipation branch 30, and the external heat dissipation branch 40, it is possible to dissipate the heat of the compressor compartment into the environment during normal operation of the refrigerator, effectively dissipating heat from the compressor 201. This eliminates the need for or reduces the use of the compressor compartment fan, thereby reducing the problems of high refrigerator noise and high power consumption caused by forced heat exchange of the fan, and also avoiding the problems of shortened lifespan of the inverter board and poor start-up performance caused by excessively high compressor compartment temperature.

[0047] Furthermore, due to the above-described configuration in this embodiment, heat from the compressor 201 can be transferred to the evaporator 202 before the refrigerator enters defrost mode (defrosting via the defrost heating wire of the evaporator 202) to assist the evaporator 202 in defrosting. When the ambient temperature is higher than the temperature of the evaporator 202, heat from the air can be further utilized to assist the evaporator 202 in defrosting, thereby saving the electrical energy used for heating the heating wire. This also minimizes the time the refrigerator spends in defrost mode or prevents it from entering defrost mode altogether, thus reducing energy consumption caused by the refrigerator resuming normal cooling after defrosting, which is beneficial for energy conservation and emission reduction.

[0048] like Figure 1 As shown, in one embodiment, the external heat dissipation device 50 is in the shape of a rectangular plate, which can be a single plate, a mesh structure with multiple intersecting channels inside, or a series of pipes connected in sequence.

[0049] Figure 3 This is a schematic diagram of the connection structure between the auxiliary heat dissipation system 100 and the microchannel condenser 203 according to another embodiment of the present invention. Figure 3 As shown, in another embodiment, the auxiliary heat dissipation system 100 further includes a condenser heat dissipation branch 60, which is in contact with the microchannel condenser 203 of the refrigerator. The solenoid valve 10 is also connected to the condenser heat dissipation branch 60 and is used to control the connection and disconnection between any two of the compressor heat dissipation branch 20, the evaporator heat dissipation branch 30, the external heat dissipation branch 40, and the condenser heat dissipation branch 60.

[0050] By controlling the connection state of the solenoid valve 10, the auxiliary heat dissipation system 100 of this embodiment can at least form the following operating conditions:

[0051] When the refrigerator is running normally, the solenoid valve 10 connects the condenser heat dissipation branch 60 and the external heat dissipation branch 40. The heat emitted by the microchannel condenser 203 causes the heat exchange medium in the condenser heat dissipation branch 60 to evaporate and flow to the external heat dissipation branch 40. Then, the heat is dissipated to the environment through the external heat dissipation device 50 connected to the external heat dissipation branch 40, so that the microchannel condenser 203 can be dissipated in a timely manner.

[0052] When the refrigerator is operating normally, if the detected temperature of the compressor compartment (or compressor 201) is higher than the ambient temperature, the solenoid valve 10 connects the compressor heat dissipation branch 20 and the external heat dissipation branch 40. The heat exchange medium in the compressor heat dissipation branch 20 evaporates and diffuses into the external heat dissipation branch 40. At this time, the external heat dissipation branch 40 is connected to both the condenser heat dissipation branch 60 and the compressor heat dissipation branch 20. The condenser heat dissipation branch 60 is not connected to the compressor heat dissipation branch 20, and the evaporator heat dissipation branch 30 is not connected to any other branch. The heat from the compressor 201 and the microchannel condenser 203 is dissipated through the external heat dissipation branch 40 and the external radiator.

[0053] Before the refrigerator stops running and the defrosting heating wire of the evaporator 202 starts, the solenoid valve 10 connects the evaporator heat dissipation branch 30 to the compressor heat dissipation branch 20 and the condenser heat dissipation branch 60 respectively. At this time, the external heat dissipation branch 40 is not yet open, meaning that the external heat dissipation branch 40 is not connected to any other branch. Just as the refrigerator is about to enter defrost mode, the compressor 201 is generally quite hot, and the microchannel condenser 203 is also quite hot. The heat from the compressor 201 and the microchannel condenser 203 is transferred to the evaporator 202 through the heat exchange medium in the compressor heat dissipation branch 20 and the condenser heat dissipation branch 60 respectively, helping the evaporator 202 defrost. By simultaneously introducing heat from the compressor 201 and the microchannel condenser 203, the evaporator 202 can dissipate heat quickly, reducing the use of the defrosting heating wire of the evaporator 202 and thus achieving energy saving.

[0054] During the defrosting process of the evaporator 202 assisted by the compressor 201 and the microchannel condenser 203, if the ambient temperature is detected to be higher than the temperature of the evaporator 202, the solenoid valve 10 can also connect the external heat dissipation branch 40 with the evaporator heat dissipation branch 30, thereby utilizing the heat from the external environment to assist the evaporator 202 in defrosting. In other words, at this time, the compressor heat dissipation branch 20, the condenser heat dissipation branch 60, and the external heat dissipation branch 40 are all connected to the evaporator heat dissipation branch 30, simultaneously increasing the heat for the evaporator 202, thus greatly improving the defrosting efficiency of the evaporator 202.

[0055] Therefore, in this embodiment, by setting four heat dissipation branches and one solenoid valve 10, the compressor 201 and the microchannel condenser 203 can be cooled individually and simultaneously. This also allows for a state where the compressor 201 and the microchannel condenser 203 simultaneously assist the evaporator 202 in defrosting, or where the compressor 201, the microchannel condenser 203, and the external heat dissipation device 50 simultaneously assist the evaporator 202 in defrosting. The auxiliary heat dissipation system 100 has a simple structure, is easy to implement, and offers rich functionality. It effectively reduces the electrical energy and noise required for the compressor 201 to dissipate heat, ensures the compressor compartment is at a suitable temperature, and effectively reduces the use of the defrosting heating wire in the evaporator 202, further reducing energy consumption and contributing to energy conservation and emission reduction.

[0056] Figure 4 This is a schematic diagram of the structure of the first heat dissipation section 61 of an auxiliary heat dissipation system 100 according to an embodiment of the present invention. Figure 4 As shown, in one embodiment, the condenser heat dissipation branch 60 includes a first heat dissipation part 61 and a first connecting pipe 62. The first connecting pipe 62 is used to connect the first heat dissipation part 61 and the solenoid valve 10. The first heat dissipation part 61 is arranged in a serpentine shape that winds around the refrigerant pipes of the microchannel condenser 203, thereby increasing the contact area between the first heat dissipation part 61 and the microchannel condenser 203.

[0057] Similarly, in one embodiment, such as Figure 2 As shown, the portion of the evaporator heat dissipation branch 30 that is attached to the evaporator 202 is also configured in the shape of a refrigerant pipe that wraps around the evaporator 202 to increase the heat dissipation area.

[0058] In another embodiment, the first heat dissipation part 61 is attached to the surface of the refrigerant pipe of the microchannel condenser 203 and the housing of the microchannel condenser 203.

[0059] Since the first heat dissipation part 61 in this embodiment is just a pipe and does not need to form a loop, it has a greater degree of freedom in its setting. It can be adapted to the shape of the microchannel condenser 203 to make the heat dissipation area larger.

[0060] In a further embodiment, the first heat dissipation unit 61 is integrated with the microchannel condenser 203. For example... Figure 4 As shown, the first heat dissipation part 61 is attached to the surface of the refrigerant pipe of the microchannel condenser 203 and assembled into a component. Then, the first heat dissipation part 61 is connected to the solenoid valve 10 through the first connecting pipe 62.

[0061] like Figure 2In the illustrated embodiment, the end of the compressor heat dissipation branch 20 is configured to be attached to the top surface of the compressor 201. The portion of the compressor heat dissipation branch 20 attached to the compressor 201 can be plate-shaped, mesh-shaped, or made of tubular components with a preset trajectory. There are no restrictions here, as long as the overall structure can adapt to the top surface of the compressor 201.

[0062] Of course, in other embodiments, the end of the compressor heat dissipation branch 20 can be configured according to space limitations, and no restrictions are imposed here.

[0063] like Figure 2 As shown, Figure 2 The rectangle outside the evaporator 202 represents the upper region of the refrigerator, and the rectangles outside the compressor 201 and microchannel condenser 203 represent the bottom region of the refrigerator. Both the compressor 201 and the microchannel condenser 203 are located at the bottom of the refrigerator. In this arrangement, the compressor compartment experiences higher temperatures. The auxiliary cooling system 100 in this embodiment provides better heat dissipation for this type of refrigerator.

[0064] The aforementioned branch lines can be individual conduits, and do not necessarily need to be configured as loops, such as... Figure 4 The condenser heat dissipation branch 60 in the middle can be a single pipe that flows upwards when heated and evaporating, for example, to... Figure 2 The evaporator heat dissipation branch 30 and the external heat dissipation branch 40 in the upper middle part flow through each other. Similarly, the evaporator heat dissipation branch 30, the compressor heat dissipation branch 20, and the external heat dissipation branch 40 can all be connected by a single pipe to transfer heat during evaporation. This type of auxiliary heat dissipation system 100 is relatively easy to install.

[0065] The aforementioned solenoid valve 10 can be connected to the refrigerator's control unit. By setting the corresponding control program in the control unit, the refrigerator can automatically generate the aforementioned operating conditions.

[0066] Figure 5 This is a schematic diagram of the structure of a refrigerator 200 according to an embodiment of the present invention. Figure 5 As shown, the present invention also provides a refrigerator 200. In one embodiment, the refrigerator 200 includes the auxiliary heat dissipation system 100 from any of the above embodiments or combinations thereof. The refrigerator 200 also includes a compressor 201 and an evaporator 20. In one embodiment, the refrigerator 200 further includes a microchannel condenser 203. In a further embodiment, the compressor 201 and the microchannel condenser 203 are disposed at the bottom of the refrigerator 200, as shown... Figure 5 As shown at point A, the refrigerator 200 in this embodiment is a refrigerator with the compressor compartment located at the bottom.

[0067] The refrigerator 200 is equipped with a compressor heat dissipation branch 20 that contacts the compressor 201 or compressor compartment, an evaporator heat dissipation branch 30 that contacts the evaporator 202, and an external heat dissipation device 50 that contacts the outside air. It is also equipped with a solenoid valve 10 for switching the connection between the compressor heat dissipation branch 20, the evaporator heat dissipation branch 30, and the external heat dissipation branch 40. Therefore, it can effectively dissipate the heat of the compressor compartment to the environment when the refrigerator 200 is running normally, thereby eliminating the need for or reducing the use of the compressor compartment fan. This reduces the problems of high refrigerator noise and high power consumption caused by forced heat exchange of the fan, and also avoids the problems of shortened life of the inverter board and poor start-up performance caused by excessive temperature of the compressor compartment.

[0068] Furthermore, due to the above-mentioned configuration, heat from the compressor 201 can be transferred to the evaporator 202 before the refrigerator enters defrost mode (defrosting via the defrost heating wire of the evaporator 202) to assist the evaporator 202 in defrosting. When the ambient temperature is higher than the temperature of the evaporator 202, heat from the air can be further utilized to assist the evaporator 202 in defrosting, thereby saving the energy used for heating the heating wire. This also minimizes or avoids the time the refrigerator spends in defrost mode, thus reducing energy consumption caused by the refrigerator resuming normal cooling after defrosting, which is beneficial for energy conservation and emission reduction.

[0069] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. An auxiliary heat dissipation system, characterized by, The auxiliary heat dissipation system comprises: a solenoid valve, a compressor heat dissipation branch for heat dissipation of a heat exchange medium, an evaporator heat dissipation branch, an external heat dissipation branch, and an external heat dissipation device; the compressor heat dissipation branch is in contact with a compressor or a compressor chamber of the refrigerator; the evaporator heat dissipation branch is in contact with an evaporator of the refrigerator; the external heat dissipation device is arranged in an environment outside the refrigerator and is connected with the external heat dissipation branch; the solenoid valve is connected with the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch, and is used for controlling the communication and blockage between any two of the compressor heat dissipation branch, the evaporator heat dissipation branch, and the external heat dissipation branch; the auxiliary heat dissipation system further comprises: a condenser heat dissipation branch in contact with a micro-channel condenser of the refrigerator; and the solenoid valve is further connected with the condenser heat dissipation branch, and is used for controlling the communication and blockage between any two of the compressor heat dissipation branch, the evaporator heat dissipation branch, the external heat dissipation branch, and the condenser heat dissipation branch; the solenoid valve is used for connecting the condenser heat dissipation branch and the external heat dissipation branch when the refrigerator is normally operated; the solenoid valve is used for connecting the evaporator heat dissipation branch with the condenser heat dissipation branch and the compressor heat dissipation branch respectively before the evaporator defrosting heating wire is started when the refrigerator is stopped.

2. The auxiliary heat dissipation system according to claim 1, wherein the compressor heat dissipation branch is attached to an outer surface of the compressor or an outer surface of the compressor chamber.

3. The auxiliary heat dissipation system according to claim 1, wherein the evaporator heat dissipation branch is attached to a surface of a refrigerant pipe of the evaporator and a housing of the evaporator.

4. The auxiliary heat dissipation system according to claim 1, wherein the external heat dissipation device is a plate-shaped component, a grid-shaped component, or a tubular component, in which a heat exchange medium flows.

5. The auxiliary heat dissipation system according to claim 1, wherein the condenser heat dissipation branch comprises a first heat dissipation part and a first connecting pipe, the first heat dissipation part is attached to a surface of a refrigerant pipe of the micro-channel condenser and a housing of the micro-channel condenser, and the first connecting pipe is used for connecting the first heat dissipation part and the solenoid valve.

6. The auxiliary heat dissipation system according to claim 5, wherein the first heat dissipation part is assembled with the micro-channel condenser as a whole.

7. The auxiliary heat dissipation system according to claim 1, wherein the compressor heat dissipation branch and the external heat dissipation branch are connected when the refrigerator is normally operated and a temperature of the compressor chamber is higher than an ambient temperature.

8. The auxiliary heat dissipation system according to claim 1, wherein the solenoid valve is further used for connecting the external heat dissipation branch with the evaporator heat dissipation branch when an ambient temperature is higher than a temperature of the evaporator.

9. A refrigerator characterized by comprising: The auxiliary heat dissipation system according to any one of claims 1-8.

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