Air conditioner electric appliance box heat dissipation device and air conditioner

Abstract

The utility model discloses an air conditioner electric appliance box heat dissipation device and an air conditioner, the air conditioner electric appliance box heat dissipation device comprises an electric appliance box body, a first heat exchange unit is arranged in the electric appliance box body, the first heat exchange unit is installed on a circulation loop, and the circulation loop is further provided with a second heat exchange unit used for conducting heat exchange with a gas-liquid separator. A heat exchange medium circularly flows among the circulation loop, the first heat exchange unit and the second heat exchange unit so as to dissipate heat of components in the electric appliance box body; the first heat exchange unit is placed in the electric appliance box body, heat dissipation of the electric appliance box body and heating of the liquid refrigerant in the vapor-liquid separator are achieved through circulating flow of the heat exchange medium, and therefore it is guaranteed that elements in the electric appliance box body are within the normal working temperature range, the elements are prevented from being burnt out by high temperature, and the service life of the electronic elements is prolonged; the refrigerant in the vapor-liquid separator is heated, so that the liquid refrigerant can be evaporated into the gaseous refrigerant, the utilization rate of the refrigerant is improved, and the working efficiency of the vapor-liquid separator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of electrical appliance boxes, in particular to a heat dissipation device for an electrical appliance box of an air conditioner and an air conditioner. Background Art

[0002] When the air conditioner is running, the temperature rise of the components in the electrical box cannot be too high, otherwise it will affect the normal operation or service life of the components. When the ambient temperature is high, the cooling comfort of the air conditioner is required to be higher, that is, there must be a sufficiently large cooling output under high temperature conditions. The frequency of the air conditioner must not be reduced under high temperature conditions. A high frequency will cause the temperature of the components to rise higher, which is not conducive to the operation of the controller.

[0003] Most packaged air conditioners rely on the heat sink structure on the electrical box for air cooling, which meets the requirements for controlling the temperature rise of the electrical box under normal operating conditions. However, when the outdoor temperature is high, due to the sealed structure of the electrical box, the heat generated by the components accumulates inside the electrical box. At this time, the heat removed by the hot outdoor air through the heat sink is limited, and effective heat dissipation cannot be achieved. As a result, the component temperature rises excessively and the entire unit cannot operate. Utility Model Content

[0004] In response to the shortcomings of the existing technology, a heat dissipation device for an air conditioner electrical box and an air conditioner are proposed. This solves the problem in the above-mentioned background technology that when the air conditioner is in cooling condition, the operating temperature inside the electrical box of the air conditioner outdoor unit is relatively high, which is not conducive to the operation of the controller. It can also increase the air intake superheat of the air conditioning system and reduce the risk of liquid backflow.

[0005] To achieve the above objectives, the present invention proposes the following technologies:

[0006] A heat dissipation device for an air conditioner electrical box includes an electrical box body, a first heat exchange unit is arranged inside the electrical box body, the first heat exchange unit is installed on a circulation loop, and a second heat exchange unit for performing heat exchange with a gas-liquid separator is also arranged on the circulation loop. A heat exchange medium circulates between the circulation loop, the first heat exchange unit and the second heat exchange unit to dissipate heat from components inside the electrical box body.

[0007] Furthermore, the electrical box body is in a sealed state, and the electrical box body is sealedly connected to the circulation loop.

[0008] Furthermore, a pump body is provided on the circulation loop, and the pump body drives the heat exchange medium to circulate in the circulation loop.

[0009] Furthermore, the second heat exchange unit is arranged inside the gas-liquid separator, and the second heat exchange unit is arranged along the vertical direction.

[0010] Furthermore, the second heat exchange unit is arranged inside the gas-liquid separator and located at the bottom of the gas-liquid separator, and the second heat exchange unit is arranged along the horizontal direction.

[0011] Furthermore, the second heat exchange unit is arranged on the periphery of the gas-liquid separator and surrounds the outer wall of the gas-liquid separator.

[0012] Furthermore, the first heat exchange unit includes a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant flow path connecting the refrigerant inlet pipe and the refrigerant outlet pipe. Several refrigerant flow paths are provided. The heat exchange medium flows into the refrigerant flow path through the refrigerant inlet pipe in the circulation loop for heat exchange, and the heat exchange medium that absorbs heat flows back to the circulation loop through the refrigerant outlet pipe.

[0013] Furthermore, a plurality of evenly distributed fins are provided on the outer side of the first heat exchange unit.

[0014] Furthermore, a fan is provided inside the electrical box body, and the fan is provided corresponding to the first heat exchange unit.

[0015] An air conditioner comprises any one of the above-mentioned air conditioner electrical box heat dissipation devices.

[0016] Compared with the prior art, the comprehensive effects brought by the utility model include:

[0017] (1) The present application sets a circulation loop between the gas-liquid separator and the electrical box body, and sets a first heat exchange unit and a second heat exchange unit on the circulation loop. The first heat exchange unit is placed inside the electrical box body, and the heat dissipation of the electrical box body and the heating of the liquid refrigerant in the gas-liquid separator are achieved through the circulation of the heat exchange medium, thereby ensuring that the components in the electrical box body are within the normal operating temperature range, avoiding the components from being burned by high temperature, and extending the service life of the electronic components; the refrigerant in the gas-liquid separator is heated, which is conducive to the evaporation of the liquid refrigerant into gaseous refrigerant, improving the utilization rate of the refrigerant, and improving the working efficiency of the gas-liquid separator.

[0018] (2) While solving the problem of excessive temperature rise in the controller, the present application heats the liquid refrigerant in the gas-liquid separator to improve evaporation efficiency, prevents liquid refrigerant from entering the compressor and causing damage, increases the air intake superheat of the air conditioning system, reduces the risk of liquid return, and ensures the efficiency and performance of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of Example 2 of the present utility model;

[0021] Figure 3This is a schematic diagram of the overall structure of Example 3 of the present utility model;

[0022] Figure 4 This is a schematic diagram of the heat exchanger structure of Example 1 of the present utility model;

[0023] Figure 5 This is another schematic diagram of the heat exchanger structure of Example 1 of the present utility model.

[0024] Legend: 1. Electrical box body; 2. Circulation loop; 3. Gas-liquid separator; 4. First heat exchange unit; 5. Pump body; 6. Second heat exchange unit; 7. Refrigerant inlet pipe; 8. Refrigerant outlet pipe; 9. Fins; 10. Refrigerant flow path; 11. Compressor; 12. Four-way valve; 13. Outdoor heat exchanger; 14. Electronic expansion valve; 15. Indoor unit. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts are within the scope of protection of the present invention.

[0026] In this document, relational terms such as "first" and "second" are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Terms such as "upper," "lower," "left," "right," and "top" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0027] Example 1

[0028] like Figure 1 and Figure 4 As shown, a heat dissipation device for an air-conditioning electrical box includes an electrical box body 1, a first heat exchange unit 4 is provided inside the electrical box body 1, the first heat exchange unit 4 is installed on a circulation loop 2, and a second heat exchange unit 6 for heat exchange with a gas-liquid separator 3 is also provided on the circulation loop 2. A heat exchange medium circulates between the circulation loop 2, the first heat exchange unit 4 and the second heat exchange unit 6 to dissipate heat from the components inside the electrical box body 1.

[0029] In this application, a circulation loop 2 is set between the gas-liquid separator 3 and the electrical box body 1, and a first heat exchange unit 4 is set on the circulation loop 2 corresponding to the electrical box body 1, and a second heat exchange unit 6 is set corresponding to the gas-liquid separator 3. The first heat exchange unit 4 is placed inside the electrical box body 1, and the heat dissipation of the electrical box body 1 and the heating of the liquid refrigerant in the gas-liquid separator 3 are achieved through the circulation of the heat exchange medium. The temperature inside the electrical box body 1 is reduced, thereby ensuring that the components in the electrical box body 1 are within the normal operating temperature range, avoiding the components from being burned by high temperature, and extending the service life of the electronic components; the refrigerant in the gas-liquid separator 3 is heated, which is conducive to the evaporation of the liquid refrigerant into gaseous refrigerant, improving the utilization rate of the refrigerant, and improving the working efficiency of the gas-liquid separator 3.

[0030] Specifically, when the circulation loop 2 drives the heat exchange medium to flow to the first heat exchange unit 4, it absorbs the heat generated by the operation of the electrical components inside the electrical box body 1, and dissipates heat from the electrical box body 1; the high-temperature heat exchange medium after absorbing the heat flows from the circulation loop 2 to the second heat exchange unit 6 to heat the liquid refrigerant in the gas-liquid separator 3 to release heat, while reducing the temperature of the heat exchange medium in the circulation loop 2, and then heat is conducted through the flow of the heat exchange medium in the circulation loop 2.

[0031] Specifically, the air-conditioning system is divided into an indoor unit 15 and an outdoor unit. The compressor 11, the electrical box body 1, the four-way valve 12 and the outdoor heat exchanger 13 are all in the outdoor unit. In the cooling mode, the liquid refrigerant is discharged from the compressor 11, passes through the four-way valve 12, the condenser, and the electronic expansion valve 14, and enters the indoor unit 15. After the low-temperature and low-pressure liquid refrigerant evaporates, it returns to the vapor-liquid separator 3. Since the refrigerant temperature in the vapor-liquid separator 3 is relatively low, only about 0 to 10°C, and the temperature in the electrical box body 1 usually reaches above 45°C, the temperature difference between the two is large, so it can be ensured that the circulation loop 2 can effectively transfer heat.

[0032] In this application, the circulation loop 2 is arranged on the peripheral side of the gas-liquid separator 3, and the gas-liquid separator 3 is located on the suction side of the compressor 11. The temperature on the suction side of the compressor 3 is in a relatively low state regardless of whether it is in cooling mode or heating mode. Therefore, the first heat exchange unit 4 can always maintain a low temperature state by performing heat exchange through the circulation loop 2, thereby effectively reducing the temperature inside the electrical box body 1, solving the problem of excessive temperature rise of the controller, and at the same time increasing the suction superheat of the air-conditioning system and reducing the risk of liquid backflow.

[0033] Preferably, a liquid heat exchange medium with a lower melting point is selected in the present application, and the circulation loop 2 is filled with the liquid heat exchange medium with a lower melting point, thereby improving the efficiency of the heat exchange medium in absorbing and releasing heat, and further improving the cooling effect on the electrical box body 1.

[0034] In the heat dissipation device for an air-conditioning electrical appliance box of this embodiment, the electrical appliance box body 1 is in a sealed state, and the electrical appliance box body 1 is sealedly connected to the circulation loop 2 .

[0035] Specifically, the first heat exchange unit 4 in the present application is a heat exchanger, both ends of the heat exchanger are connected to the circulation loop 2, and the electrical box body 1 is set to be sealed. The heat generated by the electrical components is accumulated in the electrical box body 1, and heat exchange is carried out through the air heat exchange of the heat exchanger, avoiding insufficient contact between the high-temperature air in the electrical box body 1 and the heat exchanger, so that the heat exchange effect of the electrical box body 1 is better, so as to further improve the cooling effect of the electrical box body 1.

[0036] Specifically, in the present application, the heat exchanger is placed in the sealed electrical box body 1. The sealing of the electrical box body 1 is not only beneficial to the heat exchange between the two, but also beneficial to the dust and water resistance of the electrical box body 1, thereby increasing the reliability of the system operation.

[0037] Preferably, the first heat exchange unit 4 in the present application may also be a heat exchange tube, or other structural components with heat exchange function.

[0038] In the heat dissipation device for the air-conditioning electrical appliance box of this embodiment, a pump body 5 is provided on the circulation loop 2 , and the pump body 5 drives the heat exchange medium to circulate in the circulation loop 2 .

[0039] Specifically, a pump body 5 is arranged between the first heat exchange unit 4 and the second heat exchange unit 6, and the heat exchange medium is driven by the pump body 5 to circulate in the circulation loop 2 to cool the interior of the electrical box body 1 and heat the liquid refrigerant in the gas-liquid separator 3. After the liquid refrigerant in the gas-liquid separator 3 absorbs heat and evaporates, it returns to the suction end of the compressor 11.

[0040] Preferably, in the present application, a second heat exchange unit 6 is provided on the side of the gas-liquid separator 3 to achieve heating to improve the evaporation efficiency and prevent liquid refrigerant from entering the compressor 11 and causing damage, thereby further improving the air intake superheat of the air-conditioning system and reducing the risk of liquid return.

[0041] Preferably, the circulation loop 2 in the present application can also automatically circulate through the heat pipe principle, replacing the pump body 5, further reducing energy consumption.

[0042] In the heat dissipation device for the air-conditioning electrical appliance box of this embodiment, the second heat exchange unit 6 is disposed inside the gas-liquid separator 3 , and the second heat exchange unit 6 is disposed along the vertical direction.

[0043] Specifically, in this embodiment, the second heat exchange unit 6 is selected as a heat exchange tube, which is arranged inside the gas-liquid separator 3, placed vertically, and parallel to the height direction of the gas-liquid separator 3. In this way, the contact surface with the refrigerant in the gas-liquid separator 3 is larger, thereby improving the heat exchange effect.

[0044] In the heat dissipation device of the air-conditioning electrical box of this embodiment, the first heat exchange unit 4 includes a refrigerant inlet pipe 7, a refrigerant outlet pipe 8 and a refrigerant flow path 10 connecting the refrigerant inlet pipe 7 and the refrigerant outlet pipe 8. The refrigerant flow paths 10 are provided with several lines. The heat exchange medium flows into the refrigerant flow paths 10 through the refrigerant inlet pipe 7 in the circulation loop 2 for heat exchange, and the heat exchange medium that absorbs heat flows back to the circulation loop 2 through the refrigerant outlet pipe 8.

[0045] Specifically, such as Figure 4 As shown, the heat exchange medium can have multiple flow paths after entering the first heat exchange unit 4 through the refrigerant inlet pipe 7. The figure shows one of them, which is divided into four refrigerant paths 10. By setting up multiple refrigerant flow paths 10, each refrigerant flow path 10 can respectively exchange heat at different positions inside the electrical box body 1 to achieve cooling.

[0046] Preferably, Figure 5 As shown, as another structural form of the refrigerant flow path 10 in this embodiment, the refrigerant flow path 10 is S-shaped. After the heat exchange medium enters the refrigerant flow path 10, the flow rate of the heat exchange medium is slowed down, so that the heat exchange medium is in more complete contact with the high-temperature gas in the electrical box body 1, ensuring the effect of the heat exchange medium absorbing heat and improving the utilization rate of the heat exchange medium.

[0047] In the heat dissipation device for an air-conditioning electrical appliance box of this embodiment, a plurality of evenly distributed fins 9 are provided on the outer side of the first heat exchange unit 4 .

[0048] Specifically, by providing fins 9 on the outside of the first heat exchange unit 4 , the contact area between the first heat exchange unit 4 and the air inside the electrical box body 1 is increased, thereby increasing the heat exchange amount and improving the cooling efficiency of the electrical box body 1 .

[0049] In the heat dissipation device for an air-conditioning electrical appliance box of this embodiment, a fan is provided inside the electrical appliance box body 1 , and the fan is provided corresponding to the first heat exchange unit 4 .

[0050] Specifically, a fan is added outside the fin 9 to enhance convection, so that the high-temperature gas in the electrical box body 1 is in more complete contact with the fin 9 and the first heat exchange unit, thereby further improving the heat exchange efficiency and achieving a better cooling effect.

[0051] Example 2

[0052] In the heat dissipation device for the air conditioner electrical box of this embodiment, other configurations are the same as those in embodiment 1, except that:

[0053] like Figure 2 As shown, in this embodiment, the second heat exchange unit 6 is arranged inside the gas-liquid separator 3 and located at the bottom of the gas-liquid separator 3. The second heat exchange unit 6 is arranged in a horizontal direction.

[0054] Specifically, in this embodiment, the second heat exchange unit 6 is selected as a heat exchange tube, which is placed at the bottom of the gas-liquid separator 3 and is placed horizontally to match the internal structure of the gas-liquid separator 3. The liquid refrigerant is located at the bottom of the gas-liquid separator 3. Through the above-mentioned setting, it can better contact with the liquid refrigerant at the bottom, thereby heating it and helping it to evaporate.

[0055] Example 3

[0056] In the heat dissipation device for the air conditioner electrical box of this embodiment, other configurations are the same as those in embodiment 1, except that:

[0057] like Figure 3 As shown, in this embodiment, the second heat exchange unit 6 is arranged on the periphery of the gas-liquid separator 3 and surrounds the outer wall of the gas-liquid separator 3 .

[0058] Specifically, in this embodiment, the second heat exchange unit 6 is selected as a heat exchange tube, which is placed on the outer cylinder wall of the vapor-liquid separator 3 and exchanges heat by contacting the outer wall of the vapor separator; the above arrangement facilitates the installation and disassembly of the heat exchange tube, ensuring the heat exchange effect while facilitating maintenance.

[0059] On the other hand, the present application also proposes an air conditioner, including any of the above-mentioned air conditioner electrical box heat dissipation devices. It is expected that the air conditioner in the present application includes all the beneficial effects of the air conditioner electrical box heat dissipation devices in the above-mentioned embodiments, which will not be repeated here.

[0060] In the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "setting", "connection", "fixation", "rotation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0061] Although the embodiments of the present invention have been shown and described in detail, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation device for an air conditioner electrical box, characterized in that: It includes an electrical box body, a first heat exchange unit is arranged inside the electrical box body, the first heat exchange unit is installed on a circulation loop, a second heat exchange unit for heat exchange with a gas-liquid separator is also arranged on the circulation loop, a heat exchange medium circulates between the circulation loop, the first heat exchange unit and the second heat exchange unit to dissipate heat from components inside the electrical box body.

2. The heat dissipation device for an air conditioner electrical box according to claim 1, characterized in that: The electrical box body is in a closed state, and the electrical box body is sealed and connected to the circulation loop.

3. The heat dissipation device for an air conditioner electrical box according to claim 1, characterized in that: A pump body is arranged on the circulation loop, and the pump body drives the heat exchange medium to circulate in the circulation loop.

4. The heat dissipation device for an air conditioner electrical box according to claim 3, characterized in that: The second heat exchange unit is disposed inside the gas-liquid separator, and the second heat exchange unit is disposed along a vertical direction.

5. The heat dissipation device for an air conditioner electrical box according to claim 3, characterized in that: The second heat exchange unit is arranged inside the gas-liquid separator and located at the bottom of the gas-liquid separator, and the second heat exchange unit is arranged along the horizontal direction.

6. The heat dissipation device for an air conditioner electrical box according to claim 3, characterized in that: The second heat exchange unit is arranged at the periphery of the gas-liquid separator and surrounds the outer wall of the gas-liquid separator.

7. The heat dissipation device for an air conditioner electrical box according to claim 2, characterized in that: The first heat exchange unit includes a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant flow path connecting the refrigerant inlet pipe and the refrigerant outlet pipe. The refrigerant flow paths are provided with a plurality of refrigerant flow paths. The heat exchange medium flows into the refrigerant flow path through the refrigerant inlet pipe in the circulation loop for heat exchange, and the heat exchange medium that absorbs heat flows back into the circulation loop through the refrigerant outlet pipe.

8. The heat dissipation device for an air conditioner electrical box according to claim 2, characterized in that: A plurality of evenly distributed fins are arranged on the outer side of the first heat exchange unit.

9. The heat dissipation device for an air conditioner electrical box according to claim 1, characterized in that: A fan is disposed inside the electrical box body, and the fan is disposed corresponding to the first heat exchange unit.

10. An air conditioner, characterized in that: The invention comprises the heat dissipation device of an air conditioner electrical appliance box as described in any one of claims 1 to 9.

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