Electrical box heat dissipation system and vehicle-mounted air conditioner applying same

Abstract

The vehicle-mounted air conditioner comprises a chassis, the electric appliance box heat dissipation system comprises an inner fan assembly, an in-vehicle heat exchanger and an electric appliance box which are arranged on the chassis, an air outlet and an air return opening are formed in the chassis, the electric appliance box is located at the position of the air return opening, and the inner fan assembly is arranged at the position of the air outlet. The in-vehicle heat exchanger is located between the electric appliance box and the inner fan assembly. According to the air conditioner, the inner fan assembly at the air outlet is used for extracting the cold air of the heat exchanger in the vehicle, so that the air pressure difference is formed in the electric appliance box at the air return opening, the external cold air can dissipate heat of the electric appliance box, in this way, no extra heat dissipation fan is needed, heat dissipation of the electric appliance box can be achieved only through the inner fan of the air conditioner, and the heat dissipation efficiency of the electric appliance box is improved. The failure rate is reduced, return air of the air conditioner is used for dissipating heat of the electric appliance box, compared with a traditional heat dissipation mode, the heat dissipation efficiency is higher, the risk that water enters the electric appliance box due to condensation is reduced, and in addition, the electric appliance box is located at the air outlet and is inconvenient to mount and dismount.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an electrical box heat dissipation system and a vehicle air conditioning using the same. Background Art

[0002] In the automotive air conditioning and refrigeration technology industry, in order to ensure the reliable operation of the air conditioning system, the electronic control part of the whole machine usually needs to perform multiple logic controls. Therefore, the air conditioning unit is usually equipped with multiple different types of electrical boxes to ensure the normal operation of various functions of the air conditioning. However, the heat dissipation design of the existing electrical boxes has certain shortcomings. The traditional heat dissipation method generally achieves heat dissipation by installing additional heat dissipation fans, but this method has a high failure rate and it is difficult to ensure long-term efficient and stable heat dissipation effects. It also increases the risk of condensation and water ingress into the electrical box.

[0003] In addition, most of the automotive air-conditioning electrical boxes on the current market are manufactured using open molds, which not only makes the production cost higher, but also leads to a large number of electrical boxes inside the air conditioner, which occupies a large space. In the actual layout of the air-conditioning unit, the scattered configuration of the electrical boxes affects the reasonable layout of other air-conditioning components, thereby reducing the space utilization and the overall efficiency of the system. In actual operation, the installation and disassembly process of existing electrical boxes is cumbersome, especially when performing after-sales maintenance, the staff needs to disassemble multiple electrical boxes and handle complex patch cords, repair motherboards and other operations, which brings great inconvenience and high labor intensity to the maintenance work.

[0004] In summary, the prior art has defects such as low heat dissipation efficiency of the electrical box, risk of condensation and water ingress, and inconvenient installation and disassembly. It is urgent to propose a new electrical box design solution to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an electrical box heat dissipation system and a vehicle air conditioner using the same, aiming to solve the technical problems in the prior art of low heat dissipation efficiency of the electrical box, the risk of condensation and water ingress, and inconvenient installation and disassembly.

[0006] To solve the above technical problems, the objective of the present invention is achieved through the following technical solutions: providing an electrical box cooling system, applied to a vehicle air conditioner, the vehicle air conditioner comprising a chassis, the electrical box cooling system comprising an internal fan assembly arranged on the chassis, an in-vehicle heat exchanger and an electrical box, the chassis being provided with an air outlet and a return air outlet, the electrical box being located at the position of the return air outlet, the internal fan assembly being arranged at the position of the air outlet, and the in-vehicle heat exchanger being located between the electrical box and the internal fan assembly.

[0007] Furthermore, the electrical appliance box includes an electrical appliance box body and a heat sink, the electrical appliance box body is connected to the heat sink, and the heat sink is close to the return air outlet relative to the electrical appliance box body.

[0008] Furthermore, the heat sink includes a plurality of heat exchange fins.

[0009] Furthermore, the vehicle air conditioner includes a compressor, and the electrical box body includes a main control board for controlling the operation of the compressor and a drive board for controlling the operation of the internal fan assembly, and the main control board is signal-connected to the drive board.

[0010] Furthermore, a through coil is provided on the side of the electrical box body, the compressor is connected to the main control board through the through coil, and the internal fan assembly is connected to the drive board through the through coil.

[0011] Furthermore, the main control board is provided with a temperature sensor for detecting the temperature of the main control board.

[0012] Furthermore, the electrical equipment box body further comprises an electrical component, and the electrical component is arranged on the electrical equipment box body and is located on the same side as the heat sink.

[0013] Furthermore, at least two air outlets are provided on the chassis, and at least two air outlets are respectively located on both sides of the return air outlet. The internal fan assembly and the in-vehicle heat exchanger constitute a pair of heat dissipation structures, and at least two pairs of heat dissipation structures are arranged on both sides of the electrical box. At least two internal fan assemblies are respectively located at the positions of the two air outlets.

[0014] Furthermore, the electrical box is detachably connected to the chassis.

[0015] An embodiment of the present invention further provides a vehicle air conditioner, comprising the electrical box heat dissipation system as described above.

[0016] The present invention provides an electrical box heat dissipation system, which is applied to a vehicle air conditioner. The vehicle air conditioner includes a chassis. The electrical box heat dissipation system includes an internal fan assembly arranged on the chassis, an in-vehicle heat exchanger and an electrical box. An air outlet and a return air outlet are arranged on the chassis. The electrical box is located at the position of the return air outlet. The internal fan assembly is arranged at the position of the air outlet. The in-vehicle heat exchanger is located between the electrical box and the internal fan assembly. The present invention utilizes the internal fan assembly at the air outlet to extract cold air from the in-vehicle heat exchanger, so that the electrical box arranged at the return air outlet forms an air pressure difference, and the external cold air can dissipate heat for the electrical box. In this way, no additional heat dissipation fan is required. Only the internal fan of the air conditioner can be used to dissipate heat for the electrical box, thereby reducing the failure rate. The return air of the air conditioner itself is used to dissipate heat for the electrical box. Compared with the traditional heat dissipation mode, the heat dissipation efficiency is higher and the risk of condensation and water ingress into the electrical box is reduced. In addition, the electrical box is located at the air outlet, and installation and disassembly are not convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a vehicle air conditioner provided in an embodiment of the present invention Figure 1 ;

[0019] Figure 2 A schematic diagram of a vehicle air conditioner provided in an embodiment of the present invention Figure 2 ;

[0020] Figure 3 for Figure 2 A magnified view of part A;

[0021] Figure 4 A schematic diagram of the structure of a heat dissipation system for an electrical appliance box provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of the electrical box provided in the embodiment of the present invention Figure 1 ;

[0023] Figure 6 A schematic diagram of the structure of the electrical box provided in the embodiment of the present invention Figure 2 .

[0024] Description of the symbols in the figure:

[0025] 100, chassis; 101, air outlet; 102, air return outlet; 200, compressor;

[0026] 10. Internal fan assembly;

[0027] 20. In-vehicle heat exchanger;

[0028] 30. Electrical box; 31. Electrical box body; 311. Main control board; 312. Drive board; 313. Coil; 314. Electrical components; 32. Heat sink. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] Combination Figures 1 to 4 As shown, an embodiment of the present invention provides an electrical box cooling system, which is applied to a vehicle air conditioner. The vehicle air conditioner includes a chassis 100, and the electrical box cooling system includes an internal fan assembly 10, an in-vehicle heat exchanger 20 and an electrical box 30 arranged on the chassis 100. An air outlet 101 and a return air outlet 102 are arranged on the chassis 100. The electrical box 30 is located at the position of the return air outlet 102, the internal fan assembly 10 is arranged at the position of the air outlet 101, and the in-vehicle heat exchanger 20 is located between the electrical box 30 and the internal fan assembly 10.

[0034] In this embodiment, the electrical box 30 is installed at the position of the return air port 102, so that the air at the return air port 102 can flow into the electrical box 30, and the electrical box 30 can be cooled, thereby avoiding overheating problems and improving the service life and stability of the electrical box 30. The internal fan assembly 10 is set at the position of the air outlet 101. Through the action of the internal fan assembly 10, the air at the heat exchanger 20 in the vehicle is drawn out to form an air circulation system. The selection of the internal fan assembly 10 needs to take into account the noise control in the vehicle environment. A low-noise fan is preferably used to ensure that the noise of the air-conditioning system is properly controlled during operation. The in-vehicle heat exchanger 20 (such as an evaporator) is located between the electrical box 30 and the internal fan assembly 10, and mainly plays the role of heat exchange. After heat exchange, the evaporator cools the air to form cold air that is blown out from the air outlet 101, and the return air outlet 102 can blow out the cold air and return it to the air outlet, thereby dissipating the heat from the electrical box 30. Compared with traditional heat dissipation methods, this embodiment uses the return air of the air conditioner itself to dissipate the heat from the electrical box 30, which has a larger heat dissipation area, higher heat dissipation efficiency and reduces the risk of condensation and water ingress into the electrical box 30; and no additional heat dissipation fan is required, and the heat dissipation of the electrical box 30 can be achieved by using the internal fan of the air conditioner itself, thereby reducing the failure rate.

[0035] During the operation of the vehicle air conditioner, the internal fan assembly 10 draws the air at the in-vehicle heat exchanger 20 through the air outlet 101, thereby forming an air pressure difference to promote air flow. The air pressure inside the return air outlet 102 (at the electrical box 30) is relatively small, and the air pressure outside the return air outlet 102 is relatively large, so that the air outside the chassis 100 enters the electrical box 30 from the return air outlet 102. Since the air outside the chassis 100 is cold air, when the cold air blows toward the electrical box 30, the electrical box 30 can be cooled. This structural design effectively avoids the defects of traditional heat dissipation methods, such as high failure rate of the heat dissipation fan and complex installation. Through the combined configuration of the internal fan assembly 10 and the in-vehicle heat exchanger 20, the air circulation path and heat exchange efficiency are optimized, the heat dissipation effect of the electrical box 30 is improved, and the influence of overheating of the electrical box 30 on the air conditioning system is avoided. Since the electrical box 30 is located at the return air outlet 102, the staff can directly contact the electrical box 30 when installing and disassembling the electrical box 30, reducing other unnecessary disassembly operation steps, thereby improving the efficiency of installation and maintenance and reducing the difficulty of work.

[0036] In one embodiment, the electrical box 30 includes an electrical box body 31 and a heat sink 32 . The electrical box body 31 is connected to the heat sink 32 . The heat sink 32 is closer to the return air port 102 relative to the electrical box body 31 .

[0037] In this embodiment, the electrical box body 31 is the main part of the electrical box 30. The outer shell material of the electrical box body 31 can be selected from materials with good electrical insulation and high temperature resistance to ensure that the internal circuit components can work stably in a high temperature environment and avoid circuit damage caused by insufficient heat dissipation. The function of the heat sink 32 is to enhance the heat dissipation performance of the electrical box 30 and ensure that the electrical components in the electrical box 30 will not malfunction due to excessive temperature. The heat sink 32 is made of a material with good thermal conductivity, such as aluminum alloy, copper or composite material, to improve its heat dissipation efficiency.

[0038] In order to further optimize the heat dissipation effect, the connection position between the electrical box body 31 and the heat sink 32 needs to be as close as possible to reduce the reduction in heat dissipation efficiency caused by poor contact during heat transfer. Specifically, the position of the heat sink 32 should be reasonably arranged according to the heat distribution of the electrical components inside the electrical box 30, so that the heat sink 32 can contact the heat source area to the greatest extent, thereby improving the heat dissipation performance. The heat sink 32 needs to be close to the return air outlet 102, that is, the characteristics of air flow at the return air outlet 102 are used to further improve the heat dissipation effect.

[0039] In one embodiment, the heat sink 32 includes a plurality of heat exchange fins.

[0040] In this embodiment, the heat exchange fins are designed to be thin sheets, and a fin array is formed through a reasonable arrangement to increase the surface area. In order to improve the heat exchange efficiency, it can be designed into a rectangular, circular or other optimized geometric shape. The shape design of the heat exchange fins should ensure smooth air circulation and avoid air stagnation, so as to achieve more effective heat dissipation. The spacing of the heat exchange fins can be reasonably set according to the distribution of the heat source inside the electrical box 30 and the requirements of air flow. The spacing between the fins cannot be too small to avoid obstruction of air circulation and affect the heat dissipation effect; at the same time, it cannot be too large, otherwise the surface area utilization rate of the fins will be reduced, affecting the overall heat dissipation performance.

[0041] Combination Figure 5 and Figure 6 As shown, in one embodiment, the vehicle air conditioner includes a compressor 200, and the electrical box body 31 includes a main control board 311 for controlling the operation of the compressor 200 and a drive board 312 for controlling the operation of the internal fan assembly 10, and the main control board 311 is signal-connected to the drive board 312.

[0042] In this embodiment, the compressor 200 is responsible for compressing the refrigerant and sending it to the condenser to complete the refrigeration cycle. The main control board 311, as the main control unit of the electrical box body 31, can adjust the operation of the compressor 200. The main control board 311 determines the current operating state of the air-conditioning system by receiving sensor signals (such as temperature, pressure, etc.) from the vehicle air-conditioning system, and automatically adjusts the start and stop of the compressor 200 according to these sensor signals. The internal fan assembly 10 is responsible for the air flow in the vehicle air-conditioning system to ensure the effective circulation of air during air conditioning cooling or heating. The main function of the drive board 312 is to control the operating state of the internal fan assembly 10, including the start and stop of the fan, speed adjustment and operation mode selection. The drive board 312 adjusts the working parameters of the internal fan assembly 10 according to the signal by receiving the control signal from the main control board 311. When the main control board 311 issues a start or speed adjustment command, the drive board 312 controls the motor of the internal fan assembly 10 to ensure that the fan runs at the set speed and mode to optimize the air circulation effect in the car.

[0043] Furthermore, the main control board 311 and the drive board 312 can exchange data and transmit signals through a dedicated communication line or bus system (such as CAN bus, I2C, etc.). The main control board 311 sends a corresponding control signal to the drive board 312 according to the working requirements of the air-conditioning system. After receiving the control signal, the drive board 312 accurately adjusts the working state of the internal fan assembly 10. This signal connection realizes the coordinated control of the compressor 200 and the internal fan assembly 10. For example, when the air-conditioning system is started, the main control board 311 controls the start of the internal fan assembly 10 through the drive board 312, so as to start the internal fan assembly 10 synchronously when the compressor 200 is working, to ensure efficient cooling of the air-conditioning system. When the system is turned off, the main control board 311 stops the operation of the internal fan assembly 10 through the drive board 312, thereby avoiding unnecessary energy consumption and noise.

[0044] In one embodiment, a coil 313 is provided on the side of the electrical box body 31 , the compressor 200 is connected to the main control board 311 through the coil 313 , and the internal fan assembly 10 is connected to the drive board 312 through the coil 313 .

[0045] In this embodiment, the through coil 313 is a connecting element with an electrical transmission function, which can be composed of a coil material with conductive properties, such as copper wire or other metal materials with high conductivity. The main function of the through coil 313 is to provide electrical connection for the main control board 311 and the drive board 312 inside the electrical box body 31, and to play a bridging role in power and signal transmission. The through coil 313 can be set on the side of the electrical box body 31, which is to facilitate the connection between electrical components and ensure the smooth transmission of signals and power, and also to facilitate operation during installation or maintenance. The main control board 311 can control the start, stop and operation mode of the compressor 200 through the through coil 313. When the vehicle air conditioning system needs to be cooled, the main control board 311 sends a signal to the compressor 200 through the through coil 313 to start the compressor 200 and adjust its operating frequency; when the system stops running, the main control board 311 interrupts the operation of the compressor 200 through the same connection to ensure the safe shutdown of the system. In addition to being connected to the compressor 200, the coil 313 also connects the inner fan assembly 10 to the drive board 312. The operating state of the inner fan assembly 10 is controlled by the drive board 312, and the drive board 312 is electrically connected to the inner fan assembly 10 through the coil 313, thereby realizing the adjustment and control of the fan speed.

[0046] In the specific use process, when the air conditioning cooling mode is turned on, the frequency of the compressor 200 increases, the temperature of the main control board 311 increases accordingly, and the drive board 312 controls the internal fan assembly 10 to increase the speed and increase the return air volume. Generally, when the module on the electric control board (i.e., the main control board 311 and the drive board 312) starts working (the module refers to the heat-generating component welded on the electric control board, referred to as IPM in English. When the electric control board is running, the IPM will generate heat. Generally, the temperature of the IPM is between room temperature and 95°), the temperature of the module is higher than the temperature inside the car. Therefore, when the indoor temperature drops, the cold air sucked in by the return air port 102 can reach the main control board 311 and the drive board 312 through the heat sink 32, thereby achieving the effect of cooling and heat dissipation. When there is no cooling demand, the frequency of the compressor 200 decreases, the temperature of the main control board 311 decreases and tends to the temperature inside the car, and the drive board 312 receives the temperature reduction signal, thereby driving the internal fan assembly 10 to reduce the speed. In addition, the air conditioner can adjust the return air volume according to the real-time temperature for heat dissipation.

[0047] In one embodiment, a temperature sensor for detecting the temperature of the main control board 311 is disposed on the main control board 311 .

[0048] In this embodiment, in order to ensure accurate temperature monitoring, the temperature sensor generally adopts high-precision sensing technology such as thermocouples, thermistors or semiconductor temperature sensors. The temperature sensor can be set as a small sensor integrated on the main control board 311 to reduce space occupation and improve system integration. When the heat generated during the operation of the main control board 311 causes the temperature to rise, the temperature sensor will sense this change and generate an electrical signal proportional to the temperature, which is fed back to the main control board 311. The main control board 311 determines whether the current temperature exceeds the safe operating range based on the data fed back by the sensor, and makes corresponding control adjustments.

[0049] In one embodiment, the electrical box body 31 further includes an electrical component 314 . The electrical component 314 is disposed on the electrical box body 31 and is located on the same side as the heat sink 32 .

[0050] In this embodiment, the electrical device 314 is other electronic components (such as a sub-electrical box) in the electrical box body 31, and the electrical device 314 can be used to perform signal processing or data transmission tasks of the vehicle air conditioning system. The electrical device 314 is arranged on the electrical box body 31 and is located on the same side as the heat sink 32. Such a design closely combines the layout of the electrical device 314 with the heat sink 32 to maximize the heat dissipation effect. Since the electrical device 314 and the heat sink 32 share one side, the heat generated by the electrical device 314 can be quickly transferred to the heat sink 32 by heat conduction, thereby improving the heat diffusion efficiency. The electrical box 30 can be divided into two layers, namely, a first layer containing the electrical box body 31 and a second layer containing the electrical device 314 (i.e., the sub-electrical box), the main control board 311 and the drive board 312 are mounted on the electrical box body 31, and the sub-electrical box is mainly equipped with other electronic components.

[0051] In one embodiment, at least two air outlets 101 are provided on the chassis 100, and the at least two air outlets 101 are respectively located on both sides of the return air outlet 102. The internal fan assembly 10 and the in-vehicle heat exchanger 20 constitute a pair of heat dissipation structures. At least two pairs of the heat dissipation structures are arranged on both sides of the electrical box 30, and at least two internal fan assemblies 10 are respectively located at the positions of the two air outlets 101.

[0052] In this embodiment, at least two air outlets 101 are provided on the chassis 100, and these air outlets 101 are respectively located on both sides of the return air outlet 102, so that the air flow is more uniform and the air circulation effect in the car is improved. The internal fan assembly 10 and the in-car heat exchanger 20 together constitute a heat dissipation structure, and the internal fan assembly 10 accelerates the air flow in the car through the action of the fan. Each pair of heat dissipation structures (internal fan assembly 10 and in-car heat exchanger 20) can quickly dissipate heat and distribute the cooled air to the return air outlet 102 through the air duct. The heat dissipation structure is located on both sides of the electrical box 30, thereby effectively dissipating heat and providing efficient heat dissipation capabilities. At least two internal fan assemblies 10 are respectively located at the positions of the two air outlets 101. Each internal fan assembly 10 corresponds to an air outlet 101, ensuring that the air flow and wind speed of each air outlet 101 can be independently adjusted to meet different air conditioning needs.

[0053] In one embodiment, the electrical box 30 is detachably connected to the chassis 100 .

[0054] In this embodiment, the disassembly connection structure of the electrical box 30 and the chassis 100 can adopt a variety of connection methods, such as screw connection, snap-on connection, plug-in connection or slide rail connection. The specific connection method can be selected according to the design requirements of the vehicle air conditioning system and the requirements of the working environment. The electrical box 30 and the chassis 100 are fixed together by screw holes and screws. The electrical box 30 and the chassis 100 can be connected by snaps or spring fasteners. The advantage of this connection method is that installation and disassembly are more convenient and quick, and the connection or disassembly operation can be completed by applying a certain force. The snap-on connection method is suitable for occasions that require frequent disassembly and installation, which can greatly improve work efficiency. The electrical box 30 can be a sheet metal electrical box with a high degree of integration, that is, the main control part of the air conditioner, the main control board 311, the drive board 312 and the filter board are integrated in the same box to realize the integration of electric control, which solves the problems of many types of after-sales electrical boxes and cumbersome installation and disassembly. Space is also saved by stacking two-layer electrical boxes. When the electrical box 30 is disassembled, the electrical box 30 can be separated from the chassis 100 through the detachable connection structure without using complicated tools.

[0055] Specifically, the electrical box 30 can be fixed to the chassis 100 via a support member, and the support member can be detachably fixed to the position of the return air outlet 102 of the chassis, and the electrical box 30 can be detachably fixed to the support member.

[0056] An embodiment of the present invention further provides a vehicle air conditioner, comprising the electrical box heat dissipation system as described above.

[0057] In this embodiment, the vehicle air conditioner can apply the electrical box heat dissipation system of the present invention, thereby achieving the effect of improving the heat dissipation efficiency. Figure 1 As shown, the left side is the outdoor heat exchanger side, and the heat exchange device is generally a condenser. After condensing the external fan, the heat generated by the entire air conditioning system is released to the outside. In the middle is the compressor 200 and other control components. This part transmits logic signals from the electric control area on the right to control each component to realize various functions of the air conditioner. The electric control area on the right mainly includes the electrical box 30. In addition to the electric control area, the right side also includes the indoor heat exchanger side. This type of heat exchanger is generally an evaporator. There are two evaporators, and two internal fans are set corresponding to the two evaporators.

[0058] In summary, compared with the cast aluminum electrical box that needs to be molded and is commonly used in the market, the sheet metal electrical box of the present invention also has the advantage of lower cost and is more convenient to process. The electrical box 30 of the present invention is set at the return air outlet 102, and the return air of the air conditioner itself is used to dissipate heat from the heat sink 32. Compared with the traditional heat dissipation mode, this method has higher heat dissipation efficiency and reduces the risk of condensation and water ingress into the electrical box.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An electrical box heat dissipation system, applied to a vehicle air conditioner, the vehicle air conditioner comprising a chassis, characterized in that: The electrical box cooling system includes an internal fan assembly arranged on the chassis, an in-vehicle heat exchanger and an electrical box. The chassis is provided with an air outlet and a return air outlet. The electrical box is located at the return air outlet, the internal fan assembly is arranged at the air outlet, and the in-vehicle heat exchanger is located between the electrical box and the internal fan assembly.

2. The heat dissipation system for an electrical box according to claim 1, characterized in that: The electrical appliance box comprises an electrical appliance box body and a heat sink, the electrical appliance box body is connected to the heat sink, and the heat sink is close to the return air outlet relative to the electrical appliance box body.

3. The heat dissipation system for an electrical box according to claim 2, characterized in that: The heat sink includes a plurality of heat exchange fins.

4. The electrical box heat dissipation system according to claim 2, wherein the vehicle air conditioner comprises a compressor, characterized in that: The electrical box body comprises a main control board for controlling the operation of the compressor and a drive board for controlling the operation of the internal fan assembly, and the main control board is signal-connected with the drive board.

5. The heat dissipation system for an electrical box according to claim 4, characterized in that: A through coil is provided on the side of the electrical box body, the compressor is connected to the main control board through the through coil, and the internal fan assembly is connected to the drive board through the through coil.

6. The heat dissipation system for an electrical box according to claim 4, characterized in that: The main control board is provided with a temperature sensor for detecting the temperature of the main control board.

7. The heat dissipation system for an electrical box according to claim 4, characterized in that: The electrical equipment box body further comprises an electrical component, which is arranged on the electrical equipment box body and is located on the same side as the heat sink.

8. The heat dissipation system for an electrical box according to claim 1, characterized in that: At least two air outlets are arranged on the chassis, and at least two air outlets are respectively located on both sides of the return air outlet. The internal fan assembly and the in-vehicle heat exchanger constitute a pair of heat dissipation structures, and at least two pairs of heat dissipation structures are arranged on both sides of the electrical box. At least two internal fan assemblies are respectively located at the positions of the two air outlets.

9. The heat dissipation system for an electrical box according to claim 1, characterized in that: The electrical box is detachably connected to the chassis.

10. A vehicle air conditioner, characterized in that: It comprises the heat dissipation system of the electrical box as described in any one of claims 1 to 9.

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