An electric control board, an electric control box and an air conditioning unit

Abstract

The utility model provides a kind of electric control panel first, including radiator base plate, first heating area, electrical component area and second heating area are sequentially arranged on base plate, the total heat generation of device in first heating area is less than the total heat generation of device in second heating area, device in electrical component area does not heat generation;The back of the base plate of first heating area is provided with first radiator, the back of the base plate of second heating area is provided with second radiator, and the heat dissipation efficiency of second radiator is greater than the heat dissipation efficiency of first radiator, and second radiator extends to the side of electrical component area.The utility model further provides electric control box and air conditioning unit equipped with the electric control panel.The utility model provides a kind of electric control panel, electric control box and air conditioning unit, partition according to the heat generation of electrical component, and according to heat generation, different heat dissipation efficiency radiator is set, so that each device can be evenly heat dissipated, avoid the problem of condensate and uneven heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning unit technology, and in particular to an electrical control board, an electrical control box, and an air conditioning unit. Background Technology

[0002] The multi-functional control box for bus air conditioning integrates a DC power supply, a motor drive power module, a PTC electric heating drive IGBT transistor, and other heat-generating components. It has high power and generates a large amount of heat. Furthermore, due to its high integration and small size, the power density is also relatively high. To ensure the normal operation of the power module and improve product reliability, heat pipes are used on a conventional aluminum finned heat sink for rapid heat conduction. This enhances product safety and reliability.

[0003] Current bus units use a refrigerant-based cooling system, where refrigerant is drawn from the electronic expansion valve and used to cool electrical components. However, because the refrigerant temperature is low after throttling, condensation easily forms on the radiators and heat-generating components in environments with fluctuating humidity and heat, leading to the burnout of these electrical parts. Furthermore, since the refrigerant piping needs to be routed from the refrigeration system, the installation of the multi-functional electrical control box is significantly limited by the overall installation dimensions and system design due to variations in system piping layouts.

[0004] This solution utilizes a traditional air-cooling method, with the bottom fins of the radiator positioned within the airflow. However, heat pipes are embedded in the upper substrate of the radiator, with one end positioned below the heat-generating component and the other extending onto the radiator outside the heat-generating component. This prevents condensation and eliminates the need for separate refrigerant piping in the refrigeration system, thereby increasing component reliability. Utility Model Content

[0005] To address the technical problems in the prior art, this utility model provides an electrical control board, an electrical control box, and an air conditioning unit. The electrical components are divided into zones according to their heat generation, and heat sinks with different heat dissipation efficiencies are set according to the heat generation to ensure that each component can dissipate heat evenly and avoid problems such as condensation and uneven heat dissipation.

[0006] To solve the above-mentioned technical problems, this utility model first provides an electronic control board, which adopts the following technical solution:

[0007] An electronic control board includes a heat sink substrate. A first heating zone, an electrical component zone, and a second heating zone are sequentially partitioned on the substrate. The total heat generation of the components in the first heating zone is less than the total heat generation of the components in the second heating zone. The components in the electrical component zone do not generate heat. A first heat sink is disposed on the back side of the substrate of the first heating zone, and a second heat sink is disposed on the back side of the substrate of the second heating zone. The heat dissipation efficiency of the second heat sink is greater than that of the first heat sink, and the second heat sink extends to the side of the electrical component zone.

[0008] Furthermore, the first heat sink includes heat dissipation fins evenly distributed on the back substrate of the first heat-generating area.

[0009] Furthermore, the second heat sink is a heat pipe, which includes an evaporation end and a heat dissipation end. The evaporation end is disposed on the substrate on the back side of the second heating area, and the heat dissipation end is disposed on the substrate on the side of the electrical component area.

[0010] Furthermore, a slot is formed on the substrate, and the heat pipe is pressed into the slot.

[0011] Furthermore, a hollow area is provided in the upper part of the electrical component area facing the second heating area, and the second heating area is provided on the side corresponding to the hollow area.

[0012] Furthermore, the heat pipe is bent into an L-shape, with the vertical pipe of the L-shaped heat pipe extending into the second heating zone and the horizontal pipe extending from the upper part of the second heating zone toward the electrical component area.

[0013] Furthermore, the end of the transverse conduit is flush with the edge of the electrical component area facing the first heating zone.

[0014] Furthermore, the upper part of the second heating zone is flush with the upper part of the electrical device zone.

[0015] The second objective of this invention is to provide an electronic control box, which adopts the following technical solution:

[0016] An electrical control box includes a housing, in which an electrical control board as described above is disposed, and a cooling fan is disposed on the side of the housing facing the first heat sink.

[0017] The third objective of this invention is to provide an electrical control box, which adopts the following technical solution:

[0018] An air conditioning unit is provided with an electrical control box as described above.

[0019] In summary, the electrical control board, electrical control box, and air conditioning unit provided by this utility model have the following advantages compared with the prior art:

[0020] Using heat pipes instead of fluorine cooling prevents condensation from burning out electrical components, improves the heat dissipation efficiency of electrical components, and enhances product reliability.

[0021] Using the traditional air-cooling method, the bottom fins of the first radiator are in the airflow field, and heat pipes are embedded in the substrate in the area with the largest heat generation. One end of the heat pipe is placed under the heat-generating component, and the other end extends outside the heat-generating component. This will not cause condensation and will not require separate refrigerant pipes in the refrigeration system, further increasing the reliability of the component.

[0022] Electrical components with low heat generation can be cooled by cooling fans and fins; electrical components with high heat generation and density have heat pipes installed underneath. The evaporation end of the heat pipe absorbs heat from the heat-generating component and conducts it to the condensation end. The overall thermal resistance is low, which greatly improves the heat dissipation efficiency and ensures the reliability of the electrical components.

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of the structure layout of an electronic control board according to this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the first heat sink in an electronic control board according to this utility model;

[0028] In the picture:

[0029] 1. First heating zone; 2. Electrical component zone; 3. Second heating zone; 4. Heat pipe; 5. Cooling fan; 6. Substrate; a. Evaporation end; b. Condensation end.

[0030] It should be noted that the accompanying drawings and text description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" 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 this utility model 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 limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] This utility model provides a vehicle air conditioning unit, including a refrigeration circuit for realizing the refrigeration function of the air conditioning unit. The refrigeration circuit includes a compressor, a condenser and an evaporator connected in a fully enclosed manner through refrigeration pipes. The refrigeration circuit is filled with unidirectional R1234fy refrigerant. An indoor fan is installed at the evaporator. A heating unit realizes the heating function of the air conditioning unit.

[0035] This utility model first provides an electronic control board, including a heat sink substrate 6. A first heating area 1, an electrical component area 2, and a second heating area 3 are sequentially arranged on the substrate 6. The total heat generation of the components in the first heating area 1 is less than the total heat generation of the components in the second heating area 3. The components in the electrical component area 2 do not generate heat. A first heat sink is provided on the back side of the substrate 6 of the first heating area 1, and a second heat sink is provided on the back side of the substrate 6 of the second heating area 3. The heat dissipation efficiency of the second heat sink is greater than that of the first heat sink, and the second heat sink extends to the side of the electrical component area 2.

[0036] In this embodiment, taking the electrical control box for an air conditioning unit as an example, the specific structure of the electrical control board and electrical control box provided by this utility model is introduced.

[0037] like Figure 1 and Figure 2 As shown, the electrical control box for the air conditioning unit includes a box body, an electrical control board inside the box body, a fan on the side of the box body, and ventilation grilles on each side wall to achieve ventilation and heat dissipation inside and outside the box body.

[0038] The box contains a mounting base, and the control board is assembled and fixed to the mounting base, thereby placing the control board inside the control box. Furthermore, the control board can be directly fixed to any side wall of the box.

[0039] The control board includes a heat sink substrate 6, which can be an aluminum plate and serves as a basic heat sink. The main structure of the control board includes a base plate, which is fixed to the substrate 6, and the various electrical components are mounted on the base plate. In this embodiment, the components are partitioned according to their maximum heat generation under the same conditions during normal operation. A first heating zone 1 and a second heating zone are provided on the base plate, i.e., the substrate 6.

[0040] A heat generation benchmark value is set. Electrical components whose heat generation is less than or equal to the benchmark value under working conditions are placed in the first heating zone 1. Electrical components whose heat generation is greater than the benchmark value under working conditions are placed in the second heating zone 3. That is, the heat generation of each electrical component in the first heating zone 1 is less than the heat generation of each electrical component in the second heating zone 3.

[0041] The first heating zone 1 and the second heating zone 3 are matched with heat sinks with different heat dissipation efficiencies. Correspondingly, the first heat sink is provided on the substrate 6 on the back of the first heating zone 1, and the second heat sink is provided on the substrate 6 on the back of the second heating zone 3. The heat dissipation efficiency of the first heat sink is less than that of the second heat sink.

[0042] Furthermore, the control board also includes an electrical component area 2, where electrical components that do not generate heat or whose heat generation is so negligible during operation are considered non-heating. Since the components in this area do not generate heat during operation, no heat sink is required in this area.

[0043] like Figure 1 As shown, the first heating area 1, the electrical component area 2, and the second heating area 3 are arranged from left to right on the substrate 6. Figure 1 The electrical components (as shown in the diagram) are arranged in sequence, with the non-heating electrical component area 2 located between the first heating area 1 and the second heating area 3 to avoid mutual interference between the working heat of the two areas.

[0044] Furthermore, the first heating area 1 is a rectangular area, and its area is significantly larger than that of the second heating area 3 and the electrical component area 2, accounting for about 1 / 3 of the entire substrate 6, and its height is greater than its width.

[0045] The electrical component area 2 is a rectangular area with a cut-out area in the upper right corner. That is, the upper part of the electrical component area 2 facing / close to the second heating area 3 has a cut-out area, making the electrical component area 2 L-shaped as a whole.

[0046] A second heating zone 3 is provided on the right side of the hollowed-out area of ​​the electrical component area 2. By placing the second heating zone on the side of the hollowed-out area of ​​the electrical component area 2, the thermal impact of the heat from the second heating zone on the electrical component area 2 can be effectively reduced.

[0047] The electrical component area 2 has a cutout area at its upper part facing the second heating area, and the second heating area 3 is located on the side corresponding to the cutout area. The second heating area 3 is also a rectangular area, but its width is greater than its height, and its height is less than or equal to the height of the cutout area of ​​the electrical component area 2.

[0048] The first heating zone 1, the electrical component zone 2, and the second heating zone 3 are spaced apart on the substrate 6, and the top of the first heating zone 1 ( Figure 1 (As shown) is located above the top of the electrical component area 2 and the second heating area 3.

[0049] In this embodiment, since the electrical components with relatively low heat generation are arranged in the first heating zone 1, conventional heat dissipation is sufficient. That is, heat dissipation fins are provided on the substrate 6 on the back side of the first heating zone 1, such as... Figure 2 As shown, the heat dissipation fins are integrally formed with the substrate 6 and are also made of aluminum, which can improve heat dissipation efficiency.

[0050] The heat generated by each component in the first heating zone 1 is not large, and the total heat in the entire area is not large. Therefore, conventional heat dissipation fins are used. Furthermore, the cooling fan 5 on the box is positioned directly opposite the heat dissipation fins to further improve heat dissipation efficiency.

[0051] A second heat sink is provided on the back substrate 6 of the second heating zone 3. The heat generated by each component in the second heating zone 3 is relatively large compared to that of the components in the first heating zone 1, and the area is relatively small. The components are relatively concentrated, so a heat sink with a greater heat dissipation efficiency than the heat dissipation fins is required. The heat dissipation efficiency of the second heat sink is greater than that of the first heat sink, that is, greater than that of the heat dissipation fins.

[0052] In this embodiment, the second heat sink uses heat pipe 4, which is made of pure copper powder sintering process, has high heat dissipation efficiency, and is equipped with deionized water or other heat-conducting liquid. It utilizes the principle of gas-liquid phase change and reflux heat dissipation to achieve heat dissipation.

[0053] A slot is provided on the back of the substrate 6. The heat pipe 4 is pressed into the slot, thereby embedding and fixing the heat pipe 4 to the substrate 6, and the heat pipe 4 and the substrate 6 are in close contact. The heat pipe 4 is provided with an evaporation end a and a condensation end b, wherein the evaporation end a is located at the second heating zone 3, and the condensation end b extends towards the electrical component zone 2, which does not generate heat, for heat dissipation.

[0054] like Figure 1As shown, in this embodiment, the heat pipe 4 is generally inverted L-shape. The vertical pipe of the L-shaped heat pipe 4 is located on the back substrate 6 of the second heating zone 3, and the end of the vertical pipe is the evaporation end a. The horizontal pipe of the heat pipe 4 extends from the upper part of the second heating zone 3 towards the electrical component area 2, and the end of the horizontal pipe of the heat pipe 4 is the condensation end b. The heat generated by each component in the second heating zone 3 is conducted to the heat pipe 4 through the substrate 6. The heat transfer fluid absorbs heat and evaporates at the vertical pipe, i.e., the evaporation end a. The generated steam rises, rises along the pipe, and enters the horizontal pipe under pressure. It dissipates heat quickly through the pipe and condenses into a liquid state at the condensation end b. The heat transfer fluid evaporates and condenses at the evaporation end a and the condensation end b respectively, continuously dissipating heat below the heat source.

[0055] Furthermore, there are three heat pipes 4, arranged parallel and spaced apart. The evaporation end a and condensation end b of the three heat pipes 4 are flush, with the end of evaporation end a close to the bottom edge of the second heating zone 3, and the end of condensation end b flush with the left side of the electrical component area 2 (the side adjacent to the first heating zone, the side leading to the first heating zone). The length of the horizontal pipe is greater than the length of the vertical pipe, so that after the heat transfer fluid absorbs heat and evaporates at evaporation end a, it has a longer path for heat dissipation and cooling, resulting in a better cooling effect. The L-shaped design allows the heat transfer fluid vapor in evaporation end a to rise in the vertical pipe and then enter the horizontal pipe, where its movement speed slows down, allowing for sufficient heat exchange with the heat pipes 4, further improving heat dissipation efficiency. Extensive experimental verification shows that the L-shaped heat pipe 4 has a heat exchange efficiency approximately 30% higher than the straight-tube heat pipe 4.

[0056] As mentioned above, a cooling fan 5 is installed on the housing corresponding to the heat dissipation fins of the first heat-generating area. The cooling fan 5 drives the air in the electrical control box to flow rapidly between the heat dissipation fins, carrying away the heat on the heat dissipation fins, thereby cooling down the device in the first heat-generating area.

[0057] Meanwhile, the cooling fan 5 mainly blows air onto the heat dissipation fins, but at the same time, it can generate airflow throughout the entire box. The fast-flowing airflow also flows through the substrate 6 of the electrical component area 2, thereby carrying away the slight heat that may be generated in this area. At the same time, the airflow flows through the horizontal pipe of the heat pipe 4, thereby cooling the horizontal pipe by air, causing the heat transfer liquid in the horizontal pipe to dissipate heat quickly and condense into liquid, further improving the heat exchange efficiency of the heat pipe 4. The overall heat dissipation thermal resistance is small, which greatly improves the heat dissipation efficiency and ensures the reliability of the electrical components.

[0058] Heat exchange is achieved using heat pipe 4, which has a higher temperature than conventional fluorine pipes, making it less prone to condensation.

[0059] As mentioned above, in this embodiment, the control board is divided into three sections: a first heating zone 1, an electrical component zone 2, and a second heating zone 3. The two heating zones are separated by the fact that they generate virtually no heat or very little heat during operation (collectively referred to as generating no heat) to prevent the heat from accumulating in the two heating zones and to increase heat dissipation.

[0060] The components are divided into two heat-generating zones based on their heat output, and each zone is equipped with a different heat dissipation method. Heat pipe 4 is combined with partial air cooling to enable rapid cooling and condensation at the condensing end, thereby improving the heat exchange efficiency of heat pipe 4.

[0061] In summary, the electrical control board, electrical control box, and air conditioning unit provided by this utility model have the following advantages compared with the prior art:

[0062] Using heat pipes instead of fluorine cooling prevents condensation from burning out electrical components, improves the heat dissipation efficiency of electrical components, and enhances product reliability.

[0063] Using the traditional air-cooling method, the bottom fins of the first radiator are in the airflow field, and heat pipes are embedded in the substrate in the area with the largest heat generation. One end of the heat pipe is placed under the heat-generating component, and the other end extends outside the heat-generating component. This will not cause condensation and will not require separate refrigerant pipes in the refrigeration system, further increasing the reliability of the component.

[0064] Electrical components with low heat generation can be cooled by cooling fans and fins; electrical components with high heat generation and density have heat pipes installed underneath. The evaporation end of the heat pipe absorbs heat from the heat-generating component and conducts it to the condensation end. The overall thermal resistance is low, which greatly improves the heat dissipation efficiency and ensures the reliability of the electrical components.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An electronic control board, comprising a heat sink substrate, characterized in that: A first heating area, an electrical component area, and a second heating area are sequentially arranged on the substrate. The heat generated by each device in the first heating area is less than the heat generated by each device in the second heating area. The devices in the electrical component area do not generate heat. A first heat sink is provided on the back side of the substrate of the first heating area, and a second heat sink is provided on the back side of the substrate of the second heating area. The heat dissipation efficiency of the second heat sink is greater than that of the first heat sink, and the second heat sink extends to the side of the electrical component area.

2. The electronic control board as described in claim 1, characterized in that: The first heat sink includes heat dissipation fins evenly distributed on the back substrate of the first heat-generating area.

3. The electronic control board as described in claim 2, characterized in that: The second heat sink is a heat pipe, which includes an evaporation end and a heat dissipation end. The evaporation end is located on the substrate on the back side of the second heat-generating area, and the heat dissipation end is located on the substrate on the side of the electrical component area.

4. The electronic control board as described in claim 3, characterized in that: A slot is formed on the substrate, and the heat pipe is pressed into the slot.

5. The electronic control board as described in claim 3, characterized in that: The electrical component area has a hollowed-out area at its upper part facing the second heating area, and the second heating area is located on the side corresponding to the hollowed-out area.

6. The electronic control board as described in claim 5, characterized in that: The heat pipe is bent into an L-shape, with the vertical pipe of the L-shaped heat pipe extending into the second heating zone and the horizontal pipe extending from the upper part of the second heating zone toward the electrical component area.

7. The electronic control board as described in claim 6, characterized in that: The end of the transverse conduit is flush with the edge of the electrical component area facing the first heating zone.

8. The electronic control board as described in claim 5, characterized in that: The upper part of the second heating zone is flush with the upper part of the electrical component zone.

9. An electrical control box, comprising a housing, characterized in that: The housing is provided with an electronic control board as described in any one of claims 1 to 8, and a cooling fan is provided on the side of the housing facing the first heat sink.

10. An air conditioning unit, characterized in that: It is equipped with an electrical control box as described in claim 9.

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