A cavity filter with a heat dissipation structure

Abstract

The utility model relates to cavity filter technical field, concretely relates to a cavity filter with heat dissipation structure, including cavity filter, the cavity filter front face is assembled with heat dissipation mechanism, the heat dissipation mechanism includes heat conduction copper block, the heat conduction copper block fixedly connected in the cavity filter front face, the cavity filter front face sets up the connecting plate, the connecting plate front face is fixedly connected with heat dissipation fin, the heat dissipation fin back surface is seted up with recess, the heat conduction copper block sliding connection in the recess inner wall, the heat conduction copper block with the recess inner wall is pasted, the heat dissipation fin side surface is seted up with the arc slot for the air guiding, the utility model discloses, the heat conduction copper block is directly embedded heat dissipation fin recess, and the number of intermediate interface is greatly reduced, and the local hot spot heat of resonance cavity is quickly led out, avoids the heat to be accumulated in the filter shell surface, and the heat conduction copper block is directly contacted with recess side wall, top surface, bottom surface, and the heat transfer area is improved, and the heat diffusion speed is faster.

Description

Technical Field

[0001] This utility model relates to the field of cavity filter technology, specifically a cavity filter with a heat dissipation structure. Background Technology

[0002] A cavity filter is a microwave filter that uses a resonant cavity structure. Its main structure is usually a cavity cut from a single piece of metal. Since the filter generates heat during operation, the design of the heat dissipation structure is crucial to ensuring the stability and reliability of the filter's performance.

[0003] Patent document CN222214437U discloses a cavity filter with a heat dissipation structure, including a cavity filter, a heat-conducting device, and a heat dissipation device. The heat-conducting device includes several heat-conducting plates and several heat pipes. The heat-conducting plates are disposed on various sides of the cavity filter. One end of each heat pipe is connected to a heat-conducting plate. The heat dissipation device includes a heat spreader, several heat sinks, and several cooling fans. The heat spreader is disposed at the bottom of the cavity filter. The heat sinks are disposed on the heat spreader and arranged parallel to each other. The other end of each heat pipe passes through a heat sink to evenly transfer the heat from the heat-conducting plate to each heat sink. The cooling fans are located on one side of each heat sink, and their airflow direction is parallel to the heat sink. This invention solves the problem that the cavity structure of the cavity filter is prone to heat accumulation and that existing heat dissipation methods are ineffective.

[0004] Although the aforementioned application documents describe the heat from the heat-conducting plate being evenly distributed to each of the heat sinks, and the cooling fan being located on one side of each heat sink with its airflow parallel to the heat sink, thus solving the problem of heat accumulation in the cavity structure of the cavity filter and the poor effectiveness of existing heat dissipation methods, there are still numerous thermal interfaces along the entire heat dissipation path during use. Heat is conducted through the filter housing to the thermal grease, then to the heat-conducting plate, then to the heat pipe, and finally to the heat sink fins.

[0005] Therefore, a cavity filter with a heat dissipation structure is proposed to solve the problems mentioned above. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a cavity filter with a heat dissipation structure, which solves the problem of numerous thermal interfaces existing along the entire heat dissipation path during use, which are conducted through the filter housing to the thermal grease, then to the heat-conducting plate, then to the heat pipe, and finally to the heat dissipation fins.

[0007] To achieve the above objectives, the present invention provides the following technical solution: including a cavity filter, wherein a heat dissipation mechanism is mounted on the front side of the cavity filter;

[0008] The heat dissipation mechanism includes a thermally conductive copper block, which is fixedly connected to the front of the cavity filter. A connecting plate is provided on the front of the cavity filter, and heat dissipation fins are fixedly connected to the front of the connecting plate. A groove is provided on the back of the heat dissipation fins.

[0009] Preferably, the heat-conducting copper block is slidably connected to the inner wall of the groove, and the heat-conducting copper block is in contact with the inner wall of the groove.

[0010] Preferably, the heat dissipation fins have arc-shaped grooves on their sides for guiding airflow.

[0011] Preferably, the upper surface of the heat dissipation fins and the front connection point are provided with rounded corners to prevent scratches to operators.

[0012] Preferably, the connection between the side and front of the heat dissipation fins is provided with an inclined surface to further increase the heat dissipation area of ​​the heat dissipation fins.

[0013] Preferably, the front side of the connecting plate is fixedly connected to the front side of the cavity filter by bolts.

[0014] Preferably, the slope angle is 45° and the fillet radius is R2mm.

[0015] Compared with the prior art, the present invention provides a cavity filter with a heat dissipation structure, which has the following advantages:

[0016] 1. By directly embedding the thermally conductive copper block into the groove of the heat dissipation fin, the number of intermediate interfaces is greatly reduced, and the heat from local hot spots in the resonant cavity is quickly dissipated, avoiding heat accumulation on the surface of the filter housing. The thermally conductive copper block is in direct contact with the sidewalls, top surface, and bottom surface of the groove, increasing the heat transfer area and the heat diffusion speed.

[0017] Second, the 45° bevel at the edge of the heat dissipation fins increases the heat dissipation area and guides the airflow smoothly to reduce wind resistance. The arc-shaped grooves on the side of the heat dissipation fins are used to guide the air to enter each channel evenly, eliminating eddies and dead zones. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the rear side of a portion of the structure of this utility model;

[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Cavity filter; 2. Heat dissipation mechanism; 21. Thermally conductive copper block; 22. Connecting plate; 23. Heat dissipation fins; 24. Groove; 25. Arc groove; 26. Sloping surface; 27. Rounded corner. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] See Figures 1-4 This embodiment provides a cavity filter with a heat dissipation structure, including a cavity filter 1, and a heat dissipation mechanism 2 is mounted on the front of the cavity filter 1.

[0026] The heat dissipation mechanism 2 includes a heat-conducting copper block 21, which is fixedly connected to the front of the cavity filter 1. A connecting plate 22 is provided on the front of the cavity filter 1. A heat dissipation fin 23 is fixedly connected to the front of the connecting plate 22. A groove 24 is provided on the back of the heat dissipation fin 23.

[0027] The heat dissipation mechanism 2 is assembled separately from the cavity filter 1, which facilitates manufacturing, maintenance and replacement. A local thermal bridge is established on the filter housing through the thermally conductive copper block 21 to conduct heat from the hot spot area. A huge heat dissipation surface area is provided by the connecting plate 22 and the heat dissipation fins 23 to finally dissipate heat into the air. The groove 24 on the back of the heat dissipation fins 23 further optimizes the contact method of the thermally conductive copper block 21.

[0028] When the cavity filter 1 is working, a local hot spot will be formed in the front area, such as the position corresponding to the high-power resonant cavity. The heat of the hot spot is first conducted to the heat-conducting copper block 21 fixed there. Since copper has a very high thermal conductivity, it can efficiently concentrate the heat. The heat is transferred from the heat-conducting copper block 21 to the connecting plate 22, and then diffused to the entire heat dissipation fin array 23. Finally, the heat is dissipated to the surrounding environment in the form of air convection and thermal radiation through the huge surface area of ​​the heat dissipation fins 23.

[0029] The heat-conducting copper block 21 is slidably connected to the inner wall of the groove 24. The heat-conducting copper block 21 is in contact with the inner wall of the groove 24. Heat can be transferred from the heat-conducting copper block 21 not only to the connecting plate 22 through the bottom, but also directly to the inner wall of the groove 24 that wraps the heat dissipation fins 23 through its side and top surfaces. Heat exchange can be carried out with the heat dissipation fins 23 through multiple surfaces of the heat-conducting copper block 21.

[0030] The heat dissipation fins 23 have arc-shaped grooves 25 on their sides for guiding airflow. The arc-shaped grooves 25 act as air guides, allowing air to enter the fin gaps more smoothly, reducing the eddies and resistance generated by airflow impacting the leading edge of the fins, and guiding the airflow to be distributed more evenly in each fin channel. This avoids insufficient flow in some channels. Under forced air cooling, lower wind resistance and a more uniform flow field mean that more heat can be removed with the same fan power consumption.

[0031] The upper surface of the heat dissipation fin 23 and the front connection point are provided with rounded corners 27 to prevent scratches to operators.

[0032] The heat dissipation fins 23 have a bevel 26 at the connection between the side and the front, which further increases the heat dissipation area of ​​the heat dissipation fins 23. Compared with the vertical edges, the bevel 26 provides additional surface area.

[0033] The front of the connecting plate 22 is fixedly connected to the front of the cavity filter 1 by bolts. The bolt connection is detachable, which facilitates future maintenance and replacement of the cavity filter 1 or the heat sink fins 23. The pressure provided by the bolts can ensure that the connecting plate 22 is tightly fitted with the filter housing and the heat-conducting copper block 21, reducing the contact thermal resistance.

[0034] The angle of the inclined surface 26 is 45°, and the inclined surface 26 can also guide the airflow. The radius of the rounded corner 27 is R2mm. The rounded corner 27 can avoid stress concentration at the sharp corner and improve the structural reliability and fatigue life of the heat dissipation fins 23 under vibration environment.

[0035] During use, the cavity filter 1 generates heat, especially on the front and back. The heat-conducting copper block 21, which is in close contact with the front, quickly conducts the heat from these hot spots to the connecting plate 22 and the grooves 24 specially made on the back of the heat sink fins 23. The connecting plate 22 is firmly fixed to the cavity filter 1 with screws, which ensures a secure installation and allows for better heat transfer. After the heat reaches the heat sink fins 23, the inclined surface 26 of the heat sink fins 23 increases the contact area with the air, and the arc-shaped grooves 25 on the side guide the airflow to blow more smoothly and evenly over all the heat sink fins 23, thereby improving cooling efficiency. Finally, all the accumulated heat is effectively dissipated into the surrounding air through the surface of this huge heat sink fin 23 that is blown by the airflow. All edges of the heat sink fins 23 are rounded with chamfers 27, which not only prevents people from being scratched, but also makes the heat sink fins 23 more robust and durable. The entire heat dissipation mechanism 2 is installed independently and can be easily disassembled for maintenance or replacement when needed.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cavity filter with a heat dissipation structure, characterized in that: Includes a cavity filter (1), and the cavity filter (1) is equipped with a heat dissipation mechanism (2) on its front side; The heat dissipation mechanism (2) includes a thermally conductive copper block (21), which is fixedly connected to the front of the cavity filter (1). A connecting plate (22) is provided on the front of the cavity filter (1), and a heat dissipation fin (23) is fixedly connected to the front of the connecting plate (22). A groove (24) is provided on the back of the heat dissipation fin (23).

2. A cavity filter with a heat dissipation structure according to claim 1, characterized in that: The heat-conducting copper block (21) is slidably connected to the inner wall of the groove (24), and the heat-conducting copper block (21) is in contact with the inner wall of the groove (24).

3. A cavity filter with a heat dissipation structure according to claim 2, characterized in that: The heat dissipation fins (23) have arc-shaped grooves (25) on their sides for guiding airflow.

4. A cavity filter with a heat dissipation structure according to claim 3, characterized in that: The heat dissipation fins (23) have rounded corners (27) at the connection between the upper surface and the front side to prevent scratches to operators.

5. A cavity filter with a heat dissipation structure according to claim 4, characterized in that: The heat dissipation fins (23) have a slope (26) at the connection between the side and the front of the heat dissipation fins (23) to further increase the heat dissipation area of ​​the heat dissipation fins (23).

6. A cavity filter with a heat dissipation structure according to claim 1, characterized in that: The front of the connecting plate (22) is fixedly connected to the front of the cavity filter (1) by bolts.

7. A cavity filter with a heat dissipation structure according to claim 5, characterized in that: The angle of the inclined plane (26) is 45°, and the radius of the fillet (27) is R2mm.

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