Anti-interference radio frequency module

Abstract

The utility model discloses an anti-interference radio frequency module, which comprises a bottom plate, a first metal shielding case and a second metal shielding case, and a plurality of venturi tubes are arranged between the first metal shielding case and the second metal shielding case. The throat part of the venturi tube is connected with a thin tube; the top of the first metal shielding case is provided with an opening, the thin tube is communicated with the opening through an exhaust channel, and the exhaust channel is communicated with the outside of the second metal shielding case. Therefore, external gas enters the first metal shielding cover through the venturi tube, and internal hot gas is discharged to the outside through the exhaust channel, so that heat in internal air is discharged, and the problems that heat in the internal air of the metal shielding cover of an existing anti-interference radio frequency module is treated slowly, temperature rise and continuous change of air pressure are easily caused, and the service life of the metal shielding cover is prolonged are solved. And the normal work of the radio frequency module is interfered.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency modules, and specifically relates to an anti-interference radio frequency module. Background Art

[0002] A radio frequency module is an electronic device or component integrating radio frequency signal processing functions, usually used in applications such as wireless communication, remote control, data transmission, and sensor networks, and can send and receive wireless signals within the radio frequency range.

[0003] In the Chinese utility model patent with the publication number CN217608214U, an integrated antenna radio frequency module for preventing electromagnetic interference is disclosed, which includes a bottom plate, a radio frequency module body installed on the bottom plate, and a metal shielding cover covering the upper part, improving its anti-interference performance. The heat inside is introduced to the outside through a heat pipe and a heat conduction copper pipe to dissipate heat from the radio frequency module body inside the metal shielding cover. Although part of the heat can be introduced to the outside through the heat pipe and the heat conduction copper pipe, a closed space is formed between the metal shielding cover and the bottom plate. As the radio frequency module body works, part of the heat is discharged through the heat conduction copper pipe. However, there is still part of the heat conducted to the air in the closed space, and the heat in this part of the air can only be conducted to the outside through the metal shielding cover, the bottom plate, and the copper pipe. However, the heat conduction is greatly affected by the temperature difference and the material, resulting in slow processing of this part of the heat in the air, which is likely to cause temperature rise and continuous change of air pressure, interfering with the normal operation of the radio frequency module. Summary of the Utility Model

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and provide an anti-interference radio frequency module.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An anti-interference radio frequency module includes a bottom plate, on the top of which a radio frequency module body and a first metal shielding cover are installed. The radio frequency module body is located inside the bottom plate and the first metal shielding cover. A heat pipe is installed on the top of the radio frequency module body, and a heat conduction copper pipe is installed on the top of the heat pipe, and the heat conduction copper pipe penetrates through the first metal shielding cover;

[0007] A second metal shielding cover is arranged on the upper surface of the bottom plate, and the second metal shielding cover covers the outside of the first metal shielding cover. A plurality of venturi tubes are arranged between the first metal shielding cover and the second metal shielding cover. The two ends of the venturi tube penetrate through the first metal shielding cover and the second metal shielding cover respectively, so that the venturi tube communicates with the outside of the second metal shielding cover and the inside of the first metal shielding cover respectively;

[0008] A thin tube is connected to the throat of the Venturi tube; an opening is provided at the top of the first metal shielding cover, and the thin tube and the opening are connected through an exhaust passage. The thin tube and the opening are respectively located at the bottom and top of the exhaust passage, and the middle part of the exhaust passage is connected to the outside of the second metal shielding cover to discharge the gas inside the first metal shielding cover.

[0009] Furthermore, a plurality of heat-conducting plates are provided between the first metal shielding cover and the second metal shielding cover. The top of the heat-conducting plate penetrates through the second metal shielding cover, and a plurality of heat-dissipating pins are provided at the top of the heat-conducting plate. The bottom of the heat-conducting plate is connected to the top of a heat-conducting copper tube.

[0010] Furthermore, the exhaust passage is formed by two adjacent heat-conducting plates, the first metal shielding cover and the second metal shielding cover surrounding it. An air outlet assembly is connected to one side of the exhaust passage. The air outlet assembly penetrates through the second metal shielding cover and is used to connect the exhaust passage and the outside of the second metal shielding cover. The connection part of the air outlet assembly and the exhaust passage is located above the Venturi tube.

[0011] Furthermore, the air outlet assembly includes a one-way air outlet valve. The input end of the one-way air outlet valve is connected to the inside of the second metal shielding cover, and the output end of the one-way air outlet valve is connected to the outside of the second metal shielding cover; the one-way air outlet valve is a first Tesla valve.

[0012] Furthermore, a flow guide plate is connected to the inner wall of the second metal shielding cover. The flow guide plate is located at the connection part of the exhaust passage and the one-way air outlet valve and is used to guide the air flow into the one-way air outlet valve;

[0013] A gap is left between one side of the flow guide plate and the outer wall of the first metal shielding cover to form a gap passage. The cross-section of the gap passage is adapted to the sum of the inner diameters of a plurality of corresponding thin tubes below, and the cross-section of the gap passage is smaller than the cross-section of the corresponding one-way air outlet valve.

[0014] Furthermore, a one-way intake valve is connected to one end of the Venturi tube. The one-way intake valve is a second Tesla valve.

[0015] Furthermore, a positioning rod is connected to the top of the bottom plate; the outer surface of the positioning rod is connected to the outer surface of the first metal shielding cover, the outer surface of the positioning rod is connected to the inner wall of the second metal shielding cover, and the side surface of the positioning rod is in contact with the heat-conducting plate.

[0016] Compared with the prior art, the anti-interference radio frequency module has the following beneficial effects:

[0017] The utility model solves the problem that the heat treatment of the air inside the metal shield of the existing anti-interference radio frequency module is slow, which is easy to cause temperature rise and continuous change of air pressure, interfering with the normal operation of the radio frequency module. This is achieved by opening an opening at the top of the first metal shield, arranging a second metal shield outside the first metal shield, and providing an exhaust passage and a venturi tube between the second metal shield and the first metal shield. As a result, external gas enters the interior of the first metal shield through the venturi tube, while the hot air inside is discharged to the outside through the exhaust passage, facilitating the discharge of heat in the internal air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 is a cross-sectional view of the first metal shield of the utility model;

[0020] Figure 3 is a partial exploded schematic diagram of the utility model;

[0021] Figure 4 is a cross-sectional view of the one-way intake valve of the utility model.

[0022] In the figure: 1, bottom plate; 2, radio frequency module body; 3, first metal shield; 4, second metal shield; 5, venturi tube; 6, thin tube; 7, heat-conducting copper tube; 8, heat-conducting plate; 9, sealing plate; 10, one-way exhaust valve; 11, exhaust cylinder; 12, guide plate; 13, one-way intake valve; 14, intake cylinder; 15, positioning rod; 16, heat equalizing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1-4As shown in the figure, the utility model provides a technical solution: an anti-interference radio frequency module, which includes a bottom plate 1. On the top of the bottom plate 1, a radio frequency module body 2 and a first metal shielding cover 3 are installed. The radio frequency module body 2 is located inside the bottom plate 1 and the first metal shielding cover 3. On the top of the radio frequency module body 2, a heat pipe plate 16 is provided. On the top of the heat pipe plate 16, a heat-conducting copper pipe 7 is installed, and the heat-conducting copper pipe 7 penetrates through the first metal shielding cover 3; on the upper surface of the bottom plate 1, a second metal shielding cover 4 is provided. The second metal shielding cover 4 covers the outside of the first metal shielding cover 3. Between the first metal shielding cover 3 and the second metal shielding cover 4, several venturi tubes 5 are provided. The two ends of the venturi tube 5 respectively penetrate through the first metal shielding cover 3 and the second metal shielding cover 4, so that the venturi tube 5 communicates with the outside of the second metal shielding cover 4 and the inside of the first metal shielding cover 3 respectively; the throat of the venturi tube 5 is connected with a thin tube 6; on the top of the first metal shielding cover 3, there is an opening. The thin tube 6 and the opening are respectively communicated with the bottom and the top of the exhaust passage, and the middle of the exhaust passage is communicated with the outside of the second metal shielding cover 4, so that the gas inside the first metal shielding cover 3 is discharged.

[0025] During use, the bottom plate 1 is opened according to corresponding requirements to facilitate installation and circuit connection. There are multiple exhaust passages between the first metal shielding cover 3 and the second metal shielding cover 4, and the first metal shielding cover 3 and the second metal shielding cover 4 do not contact each other. At the same time, the number of venturi tubes 5 is also multiple, and the size is adapted to the flow rate of the air flow discharged from the exhaust passage and the opening. After the radio frequency module body 2 works, its working components generate heat. Part of the heat is discharged to the outside of the first metal shielding cover 3 through the heat pipe plate 16 and the heat-conducting copper pipe 7. The internal gas moves upward after being heated and is discharged outward at the opening on the top of the first metal shielding cover 3. At the same time, the bottom is communicated with the outside through the venturi tube 5, so that the external gas enters the inside of the first metal shielding cover 3 through the venturi tube 5 for internal and external air exchange to discharge the hot air. At the same time, the bottom of the thin tube 6 at the throat of the venturi tube 5 is communicated with the throat, and the upper part is communicated with the opening through the exhaust passage. After the first metal shielding cover 3 is heated and moves upward, a relatively negative pressure space is formed below, so that the external gas enters the inside through the venturi tube 5. At the same time, when the gas passes through the venturi tube 5, the pressure at the throat is the smallest, and then a negative pressure is formed below the thin tube 6 in the exhaust passage, further pulling part of the air flow inside the exhaust passage to move downward, thereby driving the overall downward flow speed of the exhaust passage, so as to facilitate the discharge of the gas inside the first metal shielding cover 3. At the same time, the exhaust passage is also communicated with the outside of the second metal shielding cover 4, so that part of the gas in the exhaust passage is directly discharged to the outside of the second metal shielding cover 4.

[0026] A number of heat conducting plates 8 are arranged between the first metal shield 3 and the second metal shield 4. The top of the heat conducting plate 8 penetrates through the second metal shield 4. A number of heat dissipation pins are arranged at the top of the heat conducting plate 8. The bottom of the heat conducting plate 8 is connected to the top of the heat conducting copper tube 7. During use, holes are formed at the bottom of the heat conducting plate 8, and the number and positions of the holes correspond to the number and positions of the heat conducting copper tubes 7, so that the heat conducting copper tubes 7 are inserted into the holes and are in contact with the inner walls of the holes, enabling the heat on the heat conducting copper tubes 7 to be transferred to the outside through the upper surface and pins of the heat conducting plate 8, facilitating heat dissipation inside. An anti-magnetic layer is applied to the top of the heat conducting plate 8. The heat conducting plate 8 is in close fit with both the first metal shield 3 and the second metal shield 4 to prevent gas from entering and leaking through the gaps between the second metal shield 4 and the heat conducting plate 8. At the position where the heat conducting plate 8 penetrates through the second metal shield 4, a heat-resistant sealing ring is provided to further improve its sealing performance.

[0027] The exhaust passage is formed by surrounding two adjacent heat conducting plates 8, the first metal shield 3 and the second metal shield 4. An air outlet assembly is connected to one side of the exhaust passage. The air outlet assembly penetrates through the second metal shield 4 and is used to connect the exhaust passage and the outside of the second metal shield 4. The connection between the air outlet assembly and the exhaust passage is located above the venturi tube 5. During use, the cross-section of the exhaust passage is L-shaped, and the angle of the L-shape is greater than ninety degrees. The air outlet assembly and the venturi tube 5 are both located in the vertically downward part. The air inlet of the air outlet assembly is inclined and adapted to the inclined part of the exhaust passage, which is conducive to the gas inside the exhaust passage entering the air outlet assembly and then moving to the outside of the second metal shield 4. A sealing plate 9 is provided at the thin tube 6 of the venturi tube 5. The sealing plate 9 is in contact with the heat conducting plate 8, the first metal shield 3 and the second metal shield 4 respectively, and is used to block the bottom of the exhaust passage to facilitate the gas to enter the thin tube 6.

[0028] The air outlet assembly includes a one-way air outlet valve 10. The input end of the one-way air outlet valve 10 is connected to the inside of the second metal shield 4, and the output end of the one-way air outlet valve 10 is connected to the outside of the second metal shield 4. The one-way air outlet valve 10 is a first Tesla valve. During use, the input end of the first Tesla valve is connected to the exhaust cylinder 11 through a pipeline and is installed on the outer wall of the exhaust cylinder 11 at the back. The exhaust cylinder 11 penetrates through the second metal shield 4, and the inlet is connected to the exhaust passage formed inside the second metal shield 4. The first Tesla valve is conducive to the one-way flow of gas, which is conducive to the gas in the exhaust passage moving outward, and then corresponding to the air flow direction inside the first metal shield 3, forming a positive circulation loop interacting with the outside, which is conducive to the discharge of hot air.

[0029] A flow guiding plate 12 is connected to the inner wall of the second metal shielding cover 4. The flow guiding plate 12 is located at the connection between the inside of the exhaust passage and the one-way air outlet valve 10, and is used to guide the air flow into the one-way air outlet valve 10. There is a gap between one side of the flow guiding plate 12 and the outer wall of the first metal shielding cover 3 to form a gap passage. The cross-sectional area of the gap passage is adapted to the sum of the inner diameter passages of a number of corresponding thin tubes 6 below, and the cross-sectional area of the gap passage is smaller than the cross-sectional area of the corresponding one-way air outlet valve 10. During use, the thin tubes 6 are located at the throat of the venturi tube 5, so as to form a negative pressure area above the thin tubes 6, thereby attracting the gas in the exhaust passage to enter below the flow guiding plate 12 and accelerating the flow rate in the exhaust passage.

[0030] One end of the venturi tube 5 is connected to a one-way intake valve 13, and the one-way intake valve 13 is a second Tesla valve. During use, the output end of the second Tesla valve is connected to a pipeline, and the pipeline is connected to the intake cylinder 14. The back of the intake cylinder 14 is installed on one side of the second Tesla valve. At the same time, the intake cylinder 14 is connected to the second metal shielding cover 4. The intake cylinder 14 is horizontally connected to a plurality of venturi tubes 5 corresponding to one exhaust passage, which is convenient for unified control of the plurality of venturi tubes 5, and the cross-sectional area of the horizontal street passage is adapted, which is beneficial to form a positive circulation flow.

[0031] A positioning rod 15 is connected to the top of the bottom plate 1. The outer surface of the positioning rod 15 is connected to the outer surface of the first metal shielding cover 3, and the outer surface of the positioning rod 15 is connected to the inner wall of the second metal shielding cover 4. The side surface of the positioning rod 15 is in contact with the heat conducting plate 8. During use, the positioning rod 15 is detachably connected to the bottom plate 1 by means of plugging, clamping, etc. The positioning rod 15 is detachably connected to both the first metal shielding cover 3 and the second metal shielding cover 4. The bottoms of the first metal shielding cover 3 and the second metal shielding cover 4 are both in contact with the upper surface of the bottom plate 1. During installation, first place the first metal shielding cover 3 on the upper surface of the bottom plate 1, then connect the heat conducting plate 8 to the heat conducting copper tube 7, and then install the positioning rod 15. The number of positioning rods 15 is four, and they are distributed at the four corners of the first metal shielding cover 3 to facilitate the fixation of the first metal shielding cover 3. Finally, install the second metal shielding cover 4, and the edge of the second metal shielding cover 4 has a certain elasticity, so that it has a deformation effect, and then buckles part of the venturi tube 5.

Claims

1. An anti-interference radio frequency module, comprising a base plate (1), a radio frequency module body (2) and a first metal shielding cover (3) are installed on the top of the base plate (1), the radio frequency module body (2) is located on the inner side of the base plate (1) and the first metal shielding cover (3), a heat spreader (16) is arranged on the top of the radio frequency module body (2), and a heat conductive copper tube (7) is installed on the top of the heat spreader (16), characterized in that: The heat-conducting copper tube (7) passes through the first metal shielding cover (3); A second metal shielding cover (4) is arranged on the upper surface of the bottom plate (1), the second metal shielding cover (4) covers the outside of the first metal shielding cover (3), a plurality of venturi tubes (5) are arranged between the first metal shielding cover (3) and the second metal shielding cover (4), and two ends of the venturi tubes (5) respectively penetrate the first metal shielding cover (3) and the second metal shielding cover (4), so that the venturi tubes (5) are connected to the outside of the second metal shielding cover (4) and the inside of the first metal shielding cover (3); The throat of the venturi (5) is connected to a capillary tube (6); the top of the first metal shield (3) is provided with an opening, the capillary tube (6) and the opening are connected via an exhaust passage, the capillary tube (6) and the opening are located at the bottom and the top of the exhaust passage respectively, and the middle of the exhaust passage is connected to the outside of the second metal shield (4) so ​​that the gas inside the first metal shield (3) can be discharged; A plurality of heat-conducting plates (8) are arranged between the first metal shielding cover (3) and the second metal shielding cover (4), and the top of the heat-conducting plate (8) passes through the second metal shielding cover (4), the bottom of the heat-conducting plate (8) is connected to the top of the heat-conducting copper tube (7), and the top of the heat-conducting plate (8) is coated with an antimagnetic layer; A positioning rod (15) is connected to the top of the base plate (1), the inner surface of the positioning rod (15) is connected to the outer surface of the first metal shielding cover (3), the outer surface of the positioning rod (15) is connected to the inner wall of the second metal shielding cover (4), and the side surface of the positioning rod (15) is in contact with the heat conducting plate (8).

2. The anti-interference radio frequency module according to claim 1, characterized in that: A plurality of heat dissipation pins are arranged on the top of the heat conducting plate (8).

3. The anti-interference radio frequency module according to claim 2, characterized in that: The exhaust channel is formed by surrounding the two adjacent heat conducting plates (8), the first metal shielding cover (3) and the second metal shielding cover (4); one side of the exhaust channel is connected to an air outlet component, and the air outlet component passes through the second metal shielding cover (4) and is used to connect the exhaust channel and the outside of the second metal shielding cover (4); the connection point between the air outlet component and the exhaust channel is located above the venturi tube (5).

4. The anti-interference radio frequency module according to claim 3, characterized in that: The gas outlet component comprises a one-way gas outlet valve (10), the input end of the one-way gas outlet valve (10) is connected to the interior of the second metal shielding cover (4), and the output end of the one-way gas outlet valve (10) is connected to the exterior of the second metal shielding cover (4); the one-way gas outlet valve (10) is a first Tesla valve.

5. The anti-interference radio frequency module according to claim 1, characterized in that: The inner wall of the second metal shielding cover (4) is connected to a guide plate (12), and the guide plate (12) is located at a position where the inside of the exhaust channel and the one-way air outlet valve (10) are connected, and is used to guide the airflow into the one-way air outlet valve (10); One side of the guide plate (12) is spaced apart from the outer wall of the first metal shielding cover (3) to form a slit channel, the channel cross section of the slit channel being compatible with the sum of the inner diameter channels of the corresponding plurality of capillary tubes (6) below, and the channel cross section of the slit channel being smaller than the channel cross section of the corresponding one-way air outlet valve (10).

6. The anti-interference radio frequency module according to claim 1, characterized in that: One end of the venturi tube (5) is connected to a one-way air intake valve (13), and the one-way air intake valve (13) is a second Tesla valve.

Images