Efficient heat dissipation charger

Abstract

The utility model relates to the technical field of charging converters, in particular to a high-efficiency heat dissipation charger, which comprises a shell, a power supply mainboard, a synchronous rectifier, a high-frequency transformer, a power switch tube and a driver chip, the inner-layer heat-conducting fin is in contact connection with the power switch tube and the driver chip through heat-conducting silicone grease, the outer-layer heat-conducting fin is bent towards the first side surface, and the bent part is in contact connection with the synchronous rectifier and the high-frequency transformer through heat-conducting silicone grease. The electronic components which are small in size and large in heat productivity are arranged on the second side face, with the small interval between the power supply mainboard and the shell, of the power supply mainboard, and the electronic components which are large in size and large in heat productivity are arranged on the edge of the first side face, with the large interval between the power supply mainboard and the shell, of the power supply mainboard, so that the internal space of the shell can be fully utilized; and a heating small-size electronic component can be more conveniently attached and contacted with the inner-layer heat-conducting sheet, so that the heat-conducting and heat-dissipating effects are improved.

Description

Technical Field

[0001] This utility model relates to the field of charging converter technology, and in particular to a high-efficiency heat dissipation charger. Background Technology

[0002] A charger is a device that replenishes electrical energy for electronic devices. Its core working principle lies in using high-frequency switching technology to convert alternating current (AC) with fixed parameters into direct current (DC) required by the device through power electronic semiconductor devices, supplemented by an adaptive charging strategy. These devices are widely used in common electronic products such as mobile phones, laptops, and tablets.

[0003] Currently, many manufacturers in the industry tend to purchase pre-developed PCBAs (Printed Circuit Board Assemblies, i.e., integrated modules containing chips, circuit designs, and supporting components) from third-party chip manufacturers. These PCBA solutions, during development, prioritize a compact design, affordability, and lightweight characteristics that are easily perceived by consumers, taking into account factors such as fast charging efficiency, manufacturing costs, device size, and portability (affecting weight). However, this strategy often temporarily overlooks the heat dissipation challenges posed by high-power fast charging. Especially when fast charging devices such as tablets and laptops, the charger experiences significant temperature rises during operation due to high power output, potentially leading to overheating and posing a potential safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a high-efficiency heat dissipation charger with significantly improved heat dissipation performance.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a high-efficiency heat dissipation charger, including a housing, a power mainboard installed in the housing, a synchronous rectifier and a high-frequency transformer disposed on the first side of the power mainboard, and a power switching transistor and a driver chip disposed on the edge of the second side of the power mainboard. The inner wall of the housing is provided with an inner heat-conducting sheet and an outer heat-conducting sheet that is in contact with and connected to the inner heat-conducting sheet. The inner heat-conducting sheet is in contact with the power switching transistor and the driver chip through thermal grease. The outer heat-conducting sheet is bent toward the first side, and the bent part is in contact with the synchronous rectifier and the high-frequency transformer through thermal grease.

[0006] Preferably, it further includes a U-shaped clamping piece, wherein at least one edge of the inner heat-conducting sheet and the outer heat-conducting sheet are aligned with each other, and the two aligned edges are embedded in the gap of the U-shaped clamping piece.

[0007] Preferably, each of the two opposing inner walls of the housing is provided with an inner heat-conducting sheet and an outer heat-conducting sheet.

[0008] Preferably, a thermal grease layer is provided between the inner thermal conductive sheet and the outer thermal conductive sheet.

[0009] Preferably, the housing is made of a metal thermally conductive material, and a thermally conductive silicone grease layer is provided between the housing and the outer thermally conductive sheet.

[0010] The beneficial effects of this utility model are as follows: This utility model provides a high-efficiency heat dissipation charger. In the charger structure design process, small electronic components with high heat generation are arranged on the second side where the distance between the power supply motherboard and the shell is small, while large electronic components with high heat generation are arranged on the edge of the first side where the distance between the power supply motherboard and the shell is large. On the one hand, the internal space of the shell can be fully utilized, and on the other hand, it is easier to attach and contact the small electronic components with heat generation with the inner heat-conducting sheet, thereby improving the heat conduction and heat dissipation efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the high-efficiency heat dissipation charger of this utility model.

[0012] Figure 2 This is a three-dimensional structural diagram of the housing and power motherboard of the high-efficiency heat dissipation charger of this utility model when disassembled.

[0013] Figure 3 This is a three-dimensional structural diagram of the hidden housing of the high-efficiency heat dissipation charger of this utility model.

[0014] Figure 4 This is an exploded three-dimensional structural diagram of the high-efficiency heat dissipation charger of this utility model when the housing is concealed.

[0015] Figure 5 This is an exploded three-dimensional structural diagram of the hidden housing of the high-efficiency heat dissipation charger of this utility model from another perspective. Detailed Implementation

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments. The content mentioned in the embodiments is not intended to limit the present invention.

[0017] like Figures 1 to 5As shown, a high-efficiency heat dissipation charger includes a housing 1, a power mainboard 2 installed inside the housing 1, a synchronous rectifier 21 and a high-frequency transformer 22 disposed on a first side of the power mainboard 2, and a power switch 23 and a driver chip 24 disposed on the edge of a second side of the power mainboard 2. The inner wall of the housing 1 is provided with an inner heat-conducting sheet 3 and an outer heat-conducting sheet 4 that is in contact with and connected to the inner heat-conducting sheet 3. The inner heat-conducting sheet 3 is in contact with the power switch 23 and the driver chip 24 through thermal grease. The outer heat-conducting sheet 4 is bent toward the first side, and the bent part 5 is in contact with the synchronous rectifier 21 and the high-frequency transformer 22 through thermal grease.

[0018] In the charger structure design process, small electronic components with high heat generation are placed on the second side where the distance between the power supply motherboard 2 and the housing 1 is small, while large electronic components with high heat generation are placed on the edge of the first side where the distance between the power supply motherboard 2 and the housing 1 is large. On the one hand, this allows the internal space of the housing 1 to be fully utilized, and on the other hand, it makes it easier to attach and contact the small electronic components with heat generation with the inner heat-conducting sheet 3, thereby improving the heat conduction and heat dissipation efficiency.

[0019] In this embodiment, a U-shaped clamping piece 6 is also included. At least one edge of the inner heat-conducting sheet 3 and the outer heat-conducting sheet 4 are aligned with each other. The two aligned edges are embedded in the gap of the U-shaped clamping piece 6. Without increasing manufacturing costs and assembly difficulty, the inner heat-conducting sheet 3 and the outer heat-conducting sheet 4 are simply combined, improving heat conduction efficiency. The structure is stable and reliable and has strong practicality.

[0020] In this embodiment, the two opposing inner walls of the housing 1 are each provided with an inner heat-conducting sheet 3 and an outer heat-conducting sheet 4, adopting a dual heat-conducting structure similar to double inner heat-conducting sheets 3 and double outer heat-conducting sheets 4, which further improves the heat conduction efficiency between the heat-conducting sheets and electronic components.

[0021] In this embodiment, a thermal grease layer is provided between the inner thermal conductive sheet 3 and the outer thermal conductive sheet 4. The housing 1 is made of a metal thermal conductive material. A thermal grease layer is provided between the housing 1 and the outer thermal conductive sheet 4. The housing 1 made of a metal thermal conductive material has a larger heat exchange area with the outside world. The double-layer thermal grease layer structure design can more effectively conduct electronic components to the housing 1, which greatly improves the overall heat dissipation efficiency of the charger and shows significant progress.

[0022] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and 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. They should not be construed as limiting the specific protection scope of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "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 also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-efficiency heat dissipation charger, comprising a housing (1), a power supply mainboard (2) installed inside the housing (1), a synchronous rectifier (21) and a high-frequency transformer (22) disposed on a first side of the power supply mainboard (2), and a power switching transistor (23) and a driver chip (24) disposed on the edge of a second side of the power supply mainboard (2), characterized in that: The inner wall of the housing (1) is provided with an inner heat-conducting sheet (3) and an outer heat-conducting sheet (4) that is attached to the inner heat-conducting sheet (3). The inner heat-conducting sheet (3) is connected to the power switch tube (23) and the driver chip (24) through thermal grease. The outer heat-conducting sheet (4) is bent to the first side. The bent part (5) is connected to the synchronous rectifier (21) and the high-frequency transformer (22) through thermal grease.

2. The high-efficiency heat dissipation charger according to claim 1, characterized in that: It also includes a U-shaped clamping piece (6), wherein at least one edge of the inner heat-conducting sheet (3) and the outer heat-conducting sheet (4) are aligned with each other, and the two aligned edges are embedded in the gap of the U-shaped clamping piece (6).

3. The high-efficiency heat dissipation charger according to claim 1 or 2, characterized in that: The two opposing inner walls of the housing (1) are each provided with an inner heat-conducting plate (3) and an outer heat-conducting plate (4).

4. The high-efficiency heat dissipation charger according to claim 3, characterized in that: A thermal grease layer is provided between the inner thermal conductive sheet (3) and the outer thermal conductive sheet (4).

5. The high-efficiency heat dissipation charger according to claim 1, characterized in that: The housing (1) is made of a metal thermally conductive material, and a thermally conductive silicone grease layer is provided between the housing (1) and the outer thermally conductive sheet (4).

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