Electric control box and vehicle-mounted refrigerator
Patent Information
- Application Number
- CN202522427022.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-13
AI Technical Summary
[0002]相关技术中，车载冰箱的电控盒的散热器通过螺丝固定在电控盒的壳体上，散热效果不佳，且导致电控盒整体占用空间大，影响车载冰箱内部布局的紧凑性
基板位于容置腔内，通过基板将容置腔内的热量传递至散热翅片，散热翅片将热量快速散发至空气中，以实现电控盒的散热；散热翅片由散热口伸出盒体外，提高散热翅片和盒体外部的空气的热交换效率，有利于热量的快速散热，提高散热效率；沿着控制板的厚度方向，散热器的高度小于多个电子元器件中最高者的高度，以限制电控盒的高度，有利于电控盒的小型化，减小电控盒的占用空间。
Smart Images
Figure CN224872735U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of vehicle refrigerators, and in particular to an electronic control box and a vehicle refrigerator. Background Technology
[0002] In related technologies, the heat sink of the control box of the vehicle refrigerator is fixed to the shell of the control box with screws, which has poor heat dissipation effect and results in the control box occupying a large space, affecting the compactness of the internal layout of the vehicle refrigerator. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an electrical control box, which facilitates the miniaturization of the electrical control box and reduces the space occupied by the electrical control box.
[0004] This invention also provides a vehicle refrigerator that uses the above-mentioned electronic control box.
[0005] The electrical control box according to a first aspect embodiment of the present invention includes: The box body has a receiving cavity and a heat dissipation vent, the heat dissipation vent being connected to the receiving cavity; The control component includes a control board and multiple electronic components, wherein the control board is disposed within the accommodating cavity and the electronic components are mounted on one side of the control board; A heat sink includes a substrate and a plurality of heat dissipation fins, wherein the plurality of heat dissipation fins are disposed on one side of the substrate; the substrate is located within the accommodating cavity and fixed to the side of the control board near the electronic components; the heat dissipation fins extend out of the housing from the heat dissipation openings; along the thickness direction of the control board, the height of the heat sink is less than the height of the tallest of the plurality of electronic components.
[0006] The electrical control box according to the embodiment of this utility model has at least the following beneficial effects: The substrate is located inside the accommodating cavity, and the heat inside the cavity is transferred to the heat dissipation fins through the substrate. The heat dissipation fins quickly dissipate the heat into the air to achieve heat dissipation of the control box. The heat dissipation fins extend out of the box body from the heat dissipation vents, which improves the heat exchange efficiency between the heat dissipation fins and the air outside the box, which is conducive to rapid heat dissipation and improves heat dissipation efficiency. Along the thickness direction of the control board, the height of the heat sink is less than the height of the tallest of the multiple electronic components to limit the height of the control box, which is conducive to the miniaturization of the control box and reduces the space occupied by the control box.
[0007] According to some embodiments of the present invention, the edge of the heat dissipation port is provided with a pressing edge, which abuts against the edge of the substrate to limit the displacement of the substrate.
[0008] According to some embodiments of the present invention, the outer periphery of the pressing edge is provided with a surrounding edge, and a fitting groove is defined between the pressing edge and the surrounding edge; the edge of the substrate is fitted into the fitting groove.
[0009] According to some embodiments of the present invention, the box body includes a first shell and a second shell that are fastened together, and the accommodating cavity is defined between the first shell and the second shell; the heat dissipation vent is disposed on the first shell, and the control member is fixed to the second shell; the first shell and the second shell are fastened together such that the pressing edge abuts against the edge of the substrate.
[0010] According to some embodiments of the present invention, along the thickness direction of the control board, the cross-sectional area of the substrate is larger than the area of the heat dissipation port.
[0011] According to some embodiments of the present invention, the box body has a heat dissipation side, the heat dissipation side is provided with a heat dissipation groove, the heat dissipation port is located at the bottom of the heat dissipation groove, and a plurality of heat dissipation fins are located in the heat dissipation groove.
[0012] According to some embodiments of the present invention, a clearance gap is formed between the sidewall of the heat dissipation groove and the heat dissipation fins; And / or, the sidewall of the heat dissipation groove has a clearance surface that is inclined toward the groove opening of the heat dissipation groove along the direction from the center to the edge of the heat dissipation opening.
[0013] According to some embodiments of the present invention, the electronic component includes a heating element, and the substrate covers the heating element; and / or, The electronic components include a connector, which is the tallest of the plurality of electronic components.
[0014] According to some embodiments of the present invention, the electrical control box further includes a heat-conducting sheet, which is located between the heating device and the control board.
[0015] A vehicle-mounted refrigerator according to a second aspect of the present invention includes a housing and an electronic control box as described in the first aspect embodiment, wherein the electronic control box is mounted on the housing.
[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the electrical control box according to an embodiment of the present invention; Figure 2 This is a top view of the electrical control box according to an embodiment of the present invention; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure at point BB; Figure 5 This is a schematic diagram of the structure of the first shell of the electrical control box according to an embodiment of the present invention; Figure 6 This is an exploded view of the electrical control box according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a vehicle-mounted refrigerator according to an embodiment of the present invention.
[0018] Figure label: Box body 100; first shell 110; second shell 120; accommodating cavity 121; heat dissipation side 130; heat dissipation groove 140; heat dissipation vent 141; clearance gap 142; clearance surface 143; pressing edge 150; surrounding edge 160; fitting groove 170; 200; control board 210; electronic components 220; heating element 221; connector 222; Radiator 300; Base plate 310; Heat dissipation fins 320; Thermal pad 400; Casing 500; The height of the heat sink is H1; the height of the tallest of the multiple electronic components is H2. Detailed Implementation
[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0020] In the description of this utility model, it should be understood that the terms "axial", "radial", "circumferential", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.
[0021] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.
[0022] In the description of this utility model, it should be noted that terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.
[0024] In related technologies, a vehicle-mounted refrigerator refers to a refrigerated cabinet that can be carried in a vehicle. The heat sink of the vehicle-mounted refrigerator's electrical control box is fixed to the box's housing with screws. The continuous vibrations generated when the vehicle travels on bumpy roads create alternating loads on the screws of the control box, causing a decrease in screw preload and ultimately leading to loosening. Furthermore, the control box occupies a large space, affecting the compactness of the vehicle-mounted refrigerator's internal layout.
[0025] Reference Figure 1 and Figure 4 As shown, the electrical control box provided in the first aspect embodiment of this utility model includes a box body 100, a control component 200, and a heat sink 300. The box body 100 has a receiving cavity 121 and a heat dissipation port 141, with the heat dissipation port 141 communicating with the receiving cavity 121. The control component 200 includes a control board 210 and a plurality of electronic components 220. The control board 210 is disposed in the receiving cavity 121, and the electronic components 220 are mounted on one side of the control board 210. The heat sink 300 includes a substrate 310 and a plurality of heat dissipation fins 320, with the plurality of heat dissipation fins 320 disposed on one side of the substrate 310. The substrate 310 is located in the receiving cavity 121 and is fixed to the side of the control board 210 near the electronic components 220. The heat dissipation fins 320 extend out of the box body 100 from the heat dissipation port 141. Along the thickness direction of the control board 210, the height H1 of the heat sink 300 is less than the height H2 of the tallest of the plurality of electronic components 220.
[0026] The substrate 310 is located inside the accommodating cavity 121. The heat in the accommodating cavity 121 is transferred to the heat dissipation fins 320 through the substrate 310. The heat dissipation fins 320 quickly dissipate the heat into the air to achieve heat dissipation of the control box. The heat dissipation fins 320 extend out of the box body 100 from the heat dissipation port 141, which improves the heat exchange efficiency between the heat dissipation fins 320 and the air outside the box body 100, which is conducive to rapid heat dissipation and improves heat dissipation efficiency. Along the thickness direction of the control board 210, the height H1 of the heat sink 300 is less than the height H2 of the tallest of the multiple electronic components 220, so as to limit the height of the control box, which is conducive to the miniaturization of the control box and reduces the space occupied by the control box.
[0027] The control board 210 and electronic components 220 generate heat during operation. If this heat is not dissipated in time, the temperature inside the housing 100 may become too high, affecting the normal operation of the electronic components 220. The substrate 310 is located inside the accommodating cavity 121 and is fixed to the side of the control board 210 closest to the electronic components 220. This allows the heat generated by the electronic components 220 to be quickly transferred to the substrate 310 and dissipated to the outside of the housing 100 through multiple heat dissipation fins 320 on the substrate 310, preventing the temperature inside the control box from becoming too high. The substrate 310 is fixed to the control board 210, and the heat dissipation fins 320 extend out of the housing 100 from the heat dissipation port 141. This eliminates the need for a separate housing for the heat sink 300, reducing the overall size of the control box and enabling efficient heat dissipation.
[0028] Electronic components 220 are mounted on one side of the control board 210. The heights of the different electronic components 220 are not uniform. The overall height of the control unit 200 is the sum of the height H2 of the tallest of the multiple electronic components 220 and the height of the control board 210. The higher the height H2 of the tallest of the multiple electronic components 220, the taller the control unit 200. Along the thickness direction of the control board 210, the height H1 of the heat sink 300 is less than the height H2 of the tallest of the multiple electronic components 220, to avoid increasing the height of the control unit 200 due to the heat sink 300, which is beneficial for miniaturization of the control box. The height H1 of the heat sink 300 is less than the height H2 of the tallest of the multiple electronic components 220, and the substrate 310 is fixed to the control board 210, making the structure of the control box more compact. The thickness direction of the control board 210 corresponds to the height direction of the box body 100.
[0029] Multiple heat dissipation fins 320 are disposed on one side of the substrate 310 so that the multiple heat dissipation fins 320 dissipate heat to the outside of the housing 100 through the heat dissipation port 141. The main direction of heat transfer is from bottom to top. In order to fully utilize the heat dissipation effect, the heat dissipation port 141 is disposed on the upper side of the housing 100 so that heat can be quickly dissipated to the heat dissipation port 141 from bottom to top. The control board 210, the substrate 310 and the heat dissipation fins 320 are arranged in a direction from bottom to top so that the heat generated by the operation of the control board 210 rises and is quickly dissipated to the outside of the heat dissipation port 141 through the heat sink 300.
[0030] The electrical control box of this utility model embodiment is applied to a vehicle refrigerator. This utility model embodiment limits the height of the electrical control box to achieve miniaturization of the electrical control box, save the space occupied by the electrical control box, which is conducive to optimizing the internal layout of the vehicle refrigerator and can increase the capacity of the vehicle refrigerator.
[0031] like Figure 4 and Figure 5As shown, in some embodiments, the edge of the heat dissipation port 141 is provided with a pressing edge 150, which abuts against the edge of the substrate 310 to limit the displacement of the substrate 310.
[0032] It is understandable that the pressing edge 150 acts on the edge of the substrate 310, and the pressing edge 150 is located at the edge of the heat dissipation port 141 to avoid interference between the pressing edge 150 and the heat dissipation fins 320, so that multiple heat dissipation fins 320 on the substrate 310 can extend out of the box 100 through the heat dissipation port 141; multiple heat dissipation fins 320 are located in the middle of the substrate 310, and the pressing edge 150 abuts against the edge of the substrate 310, which can minimize the impact of the pressing edge 150 on the heat dissipation fins 320; passing multiple heat dissipation fins 320 through the heat dissipation port 141, so that the pressing edge 150 abuts against the edge of the substrate 310, does not require additional fixing structures or fixing screws, which can minimize the area of the substrate 310 and is conducive to the miniaturization of the electrical control box; the displacement of the substrate 310 can be restricted by a simple structure, and the heat dissipation fins 320 can extend out of the box 100 through the heat dissipation port 141 for heat dissipation. In addition, the pressing edge 150 abuts against the edge of the substrate 310, so that the substrate 310 can close the heat dissipation port 141 and prevent the components inside the accommodating cavity 121 from being exposed.
[0033] The pressing edge 150 can be the edge of the heat dissipation vent 141, or it can be a protrusion extending from the side of the heat dissipation vent 141 facing the substrate 310. Along the thickness direction of the control plate 210, the cross-sectional shape of the substrate 310 is the same as the shape of the heat dissipation vent 141 to minimize the volume of the substrate 310. The heat dissipation vent 141 can be square, circular, or other shapes; this embodiment of the invention does not impose any particular limitation on this. In this embodiment, the heat dissipation vent 141 is rectangular, and the heat dissipation fins 320 extend along the length direction of the heat dissipation vent 141. Multiple heat dissipation fins 320 are arranged along the width direction of the heat dissipation vent 141 to maximize the effective heat dissipation area. The length of the heat dissipation fins 320 is approximately the same as the length of the heat dissipation vent 141 to increase the heat dissipation area of the heat dissipation fins 320.
[0034] like Figure 4 and Figure 5 As shown, in some embodiments, a periphery 160 is provided around the pressing edge 150, and a fitting groove 170 is defined between the pressing edge 150 and the periphery 160; the edge of the substrate 310 is fitted into the fitting groove 170.
[0035] Understandably, the edge of the substrate 310 is fitted into the fitting groove 170, and the surrounding edge 160 surrounds the outer periphery of the pressing edge 150, so that the surrounding plate is located on the periphery of the substrate 310 to restrict the lateral movement of the substrate 310; the pressing edge 150 and the surrounding edge 160 restrict the displacement of the substrate 310 in the vertical and lateral directions, preventing the heat sink 300 from falling off. The fitting groove 170 is defined between the pressing edge 150 and the surrounding edge 160, which allows for quick positioning, facilitating the installation of the substrate 310 in the correct position and improving assembly efficiency.
[0036] In related technologies, the radiator 300 of the control box of a vehicle refrigerator is usually fixed to the box body 100 of the control box using screws and other fasteners. This installation is cumbersome, and during vehicle operation, the screws and other fasteners are prone to coming loose due to vibration, causing the radiator 300 to separate from the box body 100, affecting the service life of the control box. This embodiment of the invention uses a fitting groove 170 to restrict the displacement of the substrate 310, thereby fixing the radiator 300 to the control board 210. This eliminates the need for screws and other fasteners to fix the radiator 300, and also avoids the risk of the radiator 300 falling off due to vibration.
[0037] This embodiment of the utility model restricts the displacement of the substrate 310 by using the fitting groove 170, so that the relative positional relationship between the multiple heat dissipation fins 320 and the box 100 remains unchanged. The assembly is simple and does not affect the operation of the heat dissipation fins 320. Since the thickness of the substrate 310 is small, the size of the surrounding edge 160 in the thickness direction of the control board 210 is small. It is only necessary for the surrounding edge 160 to restrict the lateral movement of the control board 210, which helps to reduce the overall volume of the electrical control box.
[0038] like Figure 4 and Figure 6 As shown, in some embodiments, the housing 100 includes a first shell 110 and a second shell 120 that are fastened together, and a receiving cavity 121 is defined between the first shell 110 and the second shell 120; a heat dissipation vent 141 is disposed on the first shell 110, and a control member 200 is fixed to the second shell 120; the first shell 110 and the second shell 120 are fastened together such that the pressing edge 150 abuts against the edge of the substrate 310.
[0039] The control component 200 is fixed to the second shell 120, and the first shell 110 is placed on the second shell 120, so that the heat dissipation fins 320 extend from the heat dissipation port 141 of the first shell 110. The first shell 110 and the second shell 120 are fastened together, so that the pressing edge 150 abuts against the edge of the substrate 310, thus completing the assembly of the electrical control box. By fastening the first shell 110 and the second shell 120 together, the heat sink 300 is fixed in the correct position of the box body 100 while assembling the box body 100, simplifying the assembly steps and improving production efficiency. The control component 200 is fixed to the second shell 120, and the heat sink 300 is fixed to the control board 210 of the control component 200. The pressing edge 150 is located on the side of the first shell 110 facing the control board 210, and the pressing edge 150 abuts against the substrate 310. By fastening the first shell 110 and the second shell 120 together, the pressing edge 150 and the substrate 310 can be tightly abutted, effectively preventing the displacement of the heat sink 300. The box 100 includes a first shell 110 and a second shell 120, which helps to simplify the mold structure and reduce production costs. The first shell 110 and the second shell 120 are interlocked. When the box 100 is opened, the components inside the box 100 are fully exposed, which facilitates the maintenance of the electrical control box.
[0040] like Figure 4 As shown, in some embodiments, along the thickness direction of the control plate 210, the cross-sectional area of the substrate 310 is larger than the area of the heat dissipation port 141 to ensure that the outer peripheral edges of the substrate 310 can abut against the pressing edge 150, thereby ensuring the stability of the substrate 310 and preventing the heat sink 300 from detaching from the housing 100 during operation. If the cross-sectional area of the substrate 310 is smaller than the area of the heat dissipation port 141, the substrate 310 may easily slip out of the heat dissipation port 141, causing the heat sink 300 to detach from the housing 100.
[0041] like Figure 1 and Figure 4As shown, in some embodiments, the housing 100 has a heat dissipation side 130, and a heat dissipation groove 140 is provided on the heat dissipation side 130. A heat dissipation opening 141 is located at the bottom of the heat dissipation groove 140, and multiple heat dissipation fins 320 are located within the heat dissipation groove 140. The heat dissipation groove 140 is located on the heat dissipation side 130 of the housing 100 and is used to accommodate multiple heat dissipation fins 320, allowing the multiple heat dissipation fins 320 to extend outside the housing 100 for heat dissipation. The heat dissipation groove 140 is provided on the heat dissipation side 130, and the heat dissipation opening 141 is located at the bottom of the heat dissipation groove 140. The concave shape of the heat dissipation groove 140 provides space for the heat dissipation fins 320, preventing the heat dissipation fins 320 from protruding from the surface of the housing 100. In related technologies, the surface of the housing 100 of the electrical control box is flat, and the heat sink 300 protrudes from the upper surface of the housing 100 of the electrical control box, which increases the height of the electrical control box and is not conducive to the miniaturization of the electrical control box. In this embodiment of the invention, a heat dissipation groove 140 is provided on the heat dissipation side 130, and a heat dissipation opening 141 is provided at the bottom of the heat dissipation groove 140. While ensuring that the heat dissipation fins 320 are located outside the housing 100, the heat dissipation fins 320 are positioned as close as possible to the control board 210 to effectively prevent the heat dissipation fins 320 from protruding from the opening of the heat dissipation groove 140, thereby limiting the height of the electrical control box. It should be noted that the height of the heat dissipation fins 320 is less than the depth of the heat dissipation groove 140 to prevent the heat dissipation fins 320 from protruding from the opening of the heat dissipation groove 140.
[0042] like Figure 1 and Figure 4 As shown, in some embodiments, a clearance gap 142 is formed between the sidewall of the heat dissipation groove 140 and the heat dissipation fins 320. During assembly, the position of the heat dissipation fins 320 can be adjusted through the clearance gap 142, which helps to improve assembly efficiency. The clearance gap 142 can improve airflow efficiency, allowing external air to flow between adjacent heat dissipation fins 320 to carry away heat from the surface of the heat dissipation fins 320, thereby improving heat dissipation efficiency. The width of the heat dissipation gap can be set according to actual needs, and this embodiment of the present invention does not impose any particular limitation on it.
[0043] like Figure 1 and Figure 4 As shown, in some embodiments, the sidewall of the heat dissipation groove 140 has a clearance surface 143, which is inclined toward the groove opening of the heat dissipation groove 140 along the direction from the center to the edge of the heat dissipation opening 141.
[0044] It is understandable that the inclined clearance surface 143 can reserve sufficient space around the heat dissipation fins 320, facilitating the adjustment of the position of the heat dissipation fins 320 during assembly and promoting rapid assembly. Along the direction from the center to the edge of the heat dissipation opening 141, the clearance surface 143 is inclined towards the groove of the heat dissipation groove 140. The clearance surface 143 can guide the airflow to the heat dissipation opening 141 to remove the heat from the bottom of the heat dissipation fins 320, effectively improving the heat dissipation effect. In this embodiment, multiple heat dissipation fins 320 are arranged in a row, and an air duct is formed between two adjacent heat dissipation fins 320. The guiding surface is located in the extension direction of the air duct, so that the airflow can enter the air duct through the guiding surface, improving the heat exchange efficiency between the heat dissipation fins 320 and the air, thereby improving the heat dissipation effect. Five heat dissipation fins 320 can be provided.
[0045] The side wall of the heat dissipation groove 140 is provided with an opening, which connects the interior of the heat dissipation groove 140 and the groove opening of the heat dissipation groove 140. While improving the air flow efficiency, it is convenient to adjust the position of the heat dissipation fins 320 from the side of the heat dissipation fins 320 during assembly, which facilitates the rapid assembly of the electrical control box.
[0046] like Figures 2 to 4 As shown, in some embodiments, the electronic component 220 includes a heating element 221, and the substrate 310 covers the heating element 221 to increase the heat exchange area between the substrate 310 and the heating element 221, so that the heat generated by the heating element 221 can be quickly transferred to the substrate 310 and dissipated to the outside of the housing 100 through the heat dissipation fins 320. The heating element 221 is generally a high-power electronic component 220. Compared with other electronic components 220, the heating element 221 generates more heat when it is working. In this embodiment of the present invention, the substrate 310 covers the heating element 221 to specifically remove the heat of the heating element 221, thereby reducing the temperature of the heating element 221 in a timely manner and avoiding the high temperature from affecting the normal operation of the heating element 221. The substrate 310 is positioned to accommodate the heat-generating device 221, enabling rapid transfer and dissipation of heat generated by the device. This prevents heat from accumulating within the cavity 121, which could cause a rapid temperature rise. Furthermore, rapidly transferring heat from the device 221 to the outside of the housing 100 prevents it from affecting the operation of other electronic components 220. For example, the heat-generating device 221 could be an IGBT (Insulated Gate Bipolar Transistor) module. The surface contact between the substrate 310 and the heat-generating device 221 improves the heat transfer efficiency between them, allowing for rapid heat dissipation. The substrate 310 can be made of a metal material (e.g., copper), which has high thermal conductivity, facilitating rapid heat dissipation. The heat sink fins 320 can be made of copper or aluminum.
[0047] like Figures 2 to 4 As shown, in some embodiments, electronic component 220 includes connector 222, which is the tallest among multiple electronic components 220, that is, the height of connector 222 is greater than the height of other electronic components 220; the housing 100 is provided with an interface, and part of the connector extends out of the housing 100 through the interface.
[0048] like Figure 1 and Figure 4 As shown, in some embodiments, the control box also includes a heat-conducting sheet 400, located between the heating device 221 and the control board 210. The heat-conducting sheet 400 can accelerate the transfer of heat from the heating device 221 to the substrate 310, allowing heat to dissipate quickly. The outer surfaces of the substrate 310 and the heating device 221 are rough, uneven surfaces at the microscopic level, which is not conducive to heat conduction. The heat-conducting sheet 400 can be a paste-like or soft material with better thermal conductivity than air. By filling the tiny depressions on the surfaces of the substrate 310 and the heating device 221, the heat can be efficiently and evenly transferred to the entire substrate 310.
[0049] The thermal pad 400 can be made of thermal grease, also known as thermal paste or heat dissipation grease, which is a highly thermally conductive and insulating silicone material. Thermal grease has high thermal conductivity, excellent thermal performance, a wide operating temperature range, good stability, low consistency, and good workability. It can be applied to the surface of the heating element 221 to form the thermal pad 400. Because the thermal grease is a paste, it can form an extremely thin thermal pad 400 on the heating element 221. The thinner the thermal pad 400, the lower the thermal resistance. Furthermore, the thermal grease has good fluidity, allowing it to better expel air under pressure, thus improving the thermal conductivity of the thermal pad 400.
[0050] The thermally conductive pad 400 can also be a thermally conductive silicone pad. A thermally conductive silicone pad is a thermally conductive medium material made with silicone as the base material and fillers such as metal oxides and nitrides. The thermally conductive silicone pad improves heat transfer efficiency by filling the air gap between the heat-generating device 221 and the heat sink, and also has insulation, shock absorption, and sealing functions. The thermally conductive silicone pad is a pre-formed solid sheet with a fixed thickness and shape. It can be simply peeled off the protective film and applied, making it simple and convenient. Furthermore, the thermally conductive silicone pad is soft and elastic, able to fill the depressions on the surface of the substrate 310 and the heat-generating device 221, allowing for uniform and stable heat transfer. In addition, the thermally conductive silicone pad has a buffering and shock-absorbing effect, absorbing and dispersing external impact stress, preventing the heat sink 300 from directly damaging or crushing the heat-generating device 221.
[0051] like Figure 7As shown, a vehicle refrigerator according to a second aspect embodiment of the present invention includes a housing 500 and an electrical control box as described in the first aspect embodiment, the electrical control box being mounted on the housing 500. The box body 100 and the housing 500 can be connected by threads; since the main direction of heat transfer is from bottom to top, the box body 100 can be positioned above the housing 500, and the heat dissipation vent 141 is upward-facing, which is beneficial for rapid heat dissipation. It is understood that since the electrical control box has the beneficial effects of the above embodiments, the vehicle refrigerator correspondingly has the beneficial effects of the above embodiments. Specific implementation methods can be referred to in the above embodiments, and will not be repeated here.
[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. An electrical control box, characterized in that, include: The box body has a receiving cavity and a heat dissipation vent, the heat dissipation vent being connected to the receiving cavity; The control component includes a control board and multiple electronic components, wherein the control board is disposed within the accommodating cavity and the electronic components are mounted on one side of the control board; A heat sink includes a substrate and a plurality of heat dissipation fins, wherein the plurality of heat dissipation fins are disposed on one side of the substrate; the substrate is located within the accommodating cavity and fixed to the side of the control board near the electronic components; the heat dissipation fins extend out of the housing from the heat dissipation openings; along the thickness direction of the control board, the height of the heat sink is less than the height of the tallest of the plurality of electronic components.
2. The electrical control box according to claim 1, characterized in that, The edge of the heat dissipation vent is provided with a pressing edge, which abuts against the edge of the substrate to limit the displacement of the substrate.
3. The electrical control box according to claim 2, characterized in that, The outer periphery of the pressing edge is provided with a surrounding edge, and a fitting groove is defined between the pressing edge and the surrounding edge; the edge of the substrate is fitted into the fitting groove.
4. The electrical control box according to claim 2, characterized in that, The housing includes a first shell and a second shell that are fastened together, and the accommodating cavity is defined between the first shell and the second shell; the heat dissipation vent is disposed on the first shell, and the control component is fixed to the second shell; the first shell and the second shell are fastened together such that the pressing edge abuts against the edge of the substrate.
5. The electrical control box according to any one of claims 1 to 4, characterized in that, Along the thickness direction of the control board, the cross-sectional area of the substrate is larger than the area of the heat dissipation vent.
6. The electrical control box according to any one of claims 1 to 4, characterized in that, The box body has a heat dissipation side, the heat dissipation side is provided with a heat dissipation groove, the heat dissipation port is located at the bottom of the heat dissipation groove, and a plurality of heat dissipation fins are located in the heat dissipation groove.
7. The electrical control box according to claim 6, characterized in that, A clearance gap is formed between the sidewall of the heat dissipation groove and the heat dissipation fins; And / or, the sidewall of the heat dissipation groove has a clearance surface that is inclined toward the groove opening of the heat dissipation groove along the direction from the center to the edge of the heat dissipation opening.
8. The electrical control box according to any one of claims 1 to 4, characterized in that, The electronic component includes a heating element, and the substrate covers the heating element; and / or, The electronic components include a connector, which is the tallest of the plurality of electronic components.
9. The electrical control box according to claim 8, characterized in that, The electrical control box also includes a heat-conducting sheet, which is located between the heating element and the control board.
10. A vehicle-mounted refrigerator, characterized in that, It includes a housing and an electrical control box as described in any one of claims 1 to 9, wherein the electrical control box is mounted on the housing.