High and low frequency mixed filter with protection structure

Abstract

The utility model relates to the technical field of filters, in particular to a high and low frequency mixed filter with a protection structure. According to the technical scheme, the filter comprises a filter body, a heat dissipation plate and a protective cover are fixedly installed on the upper surface of the filter body, the heat dissipation plate is located in the protective cover, ventilation openings are symmetrically formed in the two sides of the outer surface of the protective cover, and a plurality of first heat dissipation fins are evenly welded to the upper surface of the heat dissipation plate; a plurality of second heat dissipation fins are uniformly welded to the lower surface of the heat dissipation plate, the second heat dissipation fins penetrate through the filter body, and heat dissipation fans are fixedly installed on the two sides of the interior of the protective cover. According to the utility model, the sealing performance is not damaged while heat dissipation is performed on the interior of the filter, and external humid air is prevented from entering the interior of the filter, so that corrosion damage and short circuit of electronic components in the filter are avoided, and the service life of the filter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a high- and low-frequency mixed filter with a protection structure. Background Art

[0002] A filter is a frequency-selective device that allows specific frequency components in a signal to pass through while greatly attenuating other frequency components. The frequency-selective function of the filter can be used to filter out interference noise or perform spectrum analysis. In other words, any device or system that allows specific frequency components in a signal to pass through while greatly attenuating or suppressing other frequency components is called a filter. In signal processing, the role of filters is crucial and they are widely used in communication systems, audio processing, image processing, biomedicine and other fields.

[0003] After searching, it is found that the high- and low-frequency mixed filters with protective structures in the prior art are typically such as a filter with a protective mechanism disclosed in publication number CN219477942U, including a filter body, an organic body arranged inside the filter body, and a protective device arranged inside the filter body, the protective device including: a heat sink, a heat sink fin, a connecting rod, a motor, a rotating rod, a fan blade, a vent, a slide groove, a sliding block, a filter screen, a bearing, a rotating magnet, and a rotating blade. When the fan blade rotates, the rotating blade will drive the rotating blade to rotate, and the rotating blade rotates to drive the rotating magnet to rotate in the two bearings, thereby changing the magnetic pole of the rotating magnet. The rotating magnet has a magnetic repulsion and attraction effect on the permanent magnet. When the rotating magnet has a magnetic attraction or repulsion effect on the permanent magnet, the permanent magnet drives the filter screen to move back and forth in the slide groove. Through the continuous rotation of the rotating magnet, the filter screen is driven to vibrate back and forth in the slide groove by the magnetic action, so that the dust on the surface of the filter screen falls off.

[0004] Although the existing technology can dissipate heat for the filter through internal and external ventilation, moisture in the atmosphere will also enter the filter with the air, causing corrosion and damage to the metal parts of electronic components such as resistors and inductors, and easily causing short circuits in the circuits inside the filter, and reducing the sealing performance of the filter. For this reason, we propose a high- and low-frequency mixed filter with a protective structure. Utility Model Content

[0005] The purpose of the utility model is to provide a high- and low-frequency mixed filter with a protective structure, which has the advantages of being able to dissipate heat inside the filter without damaging the sealing performance, preventing external humid air from entering the interior of the filter, thereby avoiding corrosion damage and circuit short circuit of electronic components inside the filter, and extending the service life of the filter. It solves the problem in the prior art that although the filter can be ventilated by internal and external ventilation, moisture in the atmosphere will also enter the interior of the filter with the air, causing corrosion damage to the metal parts of electronic components such as resistors and inductors, and easily causing short circuit in the circuit inside the filter, and reducing the sealing performance of the filter.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high- and low-frequency mixed filter with a protective structure, comprising a filter body, a heat sink and a protective cover fixedly mounted on the upper surface of the filter body, and the heat sink is located inside the protective cover, and vents are symmetrically arranged at both sides of the outer surface of the protective cover, a plurality of first heat sink fins are evenly welded on the upper surface of the heat sink, a plurality of second heat sink fins are evenly welded on the lower surface of the heat sink, and the second heat sink fins pass through the filter body, cooling fans are fixedly mounted at both sides of the inside of the protective cover, mesh frames are arranged inside the protective cover near the outer sides of the two cooling fans, filters are fixedly mounted inside the two mesh frames, and a timing switch is fixedly mounted on the top of the inner wall of the protective cover.

[0007] Preferably, the two cooling fans are electrically connected to the timing switch, and the two cooling fans work periodically and alternately under the control of the timing switch, so that the cooling fans can blow away dust and impurities adhering to the filter, thereby ensuring the dust filtering performance of the filter.

[0008] Preferably, a temperature sensor is fixedly installed inside the filter body, and the temperature sensor and the timing switch are electrically connected. The temperature inside the filter body is monitored by the temperature sensor. When the temperature inside the filter body is not high and the internal heat can be dissipated only by the first heat dissipation fins, the heat dissipation plate and the second heat dissipation fins, the cooling fan stops working. When the temperature inside the filter body cannot dissipate the internal heat only by the first heat dissipation fins, the heat dissipation plate and the second heat dissipation fins, the sensor controls the two cooling fans to work through the timing switch to increase the air flow inside the protective cover.

[0009] Preferably, sockets are symmetrically provided at both sides of the upper surface of the protective cover, and the two mesh frames pass through the two sockets respectively, and limiting grooves are symmetrically provided on both sides of the inner wall of the protective cover near the front surface and the rear surface. When installing the filter, the mesh frame is inserted into the interior of the protective cover from the socket, and the front and rear ends of the mesh frame are respectively located in the two limiting grooves, and the installation of the filter is completed. When removing the filter, the filter and the mesh frame can be directly pulled out from the socket and the limiting groove.

[0010] Preferably, an annular groove is provided on the lower surface of the heat sink near the edge, and a sealing ring is provided inside the annular groove. The heat sink is fixed to the upper surface of the filter body by screws, and the sealing ring inside the annular groove seals the gap between the heat sink and the filter body, preventing humid air or water from entering the interior of the filter body through the gap between the heat sink and the filter body and the gap between the second heat sink fin and the filter body.

[0011] Preferably, fixing plates are welded on both sides of the outer surface of the filter body near the lower surface, and mounting holes for screws to pass through are provided on the upper surfaces of the two fixing plates to facilitate fixed installation of the filter body.

[0012] Preferably, connectors are fixedly connected at both sides of the outer surface of the filter body, and the filter body is electrically connected to the cable via the connectors.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model achieves the effect of dissipating heat inside the filter without damaging the sealing performance by arranging a filter body, a heat sink, a first heat sink fin, a second heat sink fin, a protective cover, a filter, a heat sink fan and a timing switch, thereby preventing external humid air from entering the interior of the filter, thereby preventing corrosion damage and circuit short circuit of electronic components inside the filter, and extending the service life of the filter. The heat inside the filter body is transferred to the heat sink and the first heat sink through the second heat sink fin. The two heat sink fans work alternately and periodically under the control of the timing switch, so that the external cold air periodically enters the interior of the protective cover from the two vents respectively, and impurities in the air are filtered out through the filter before entering the protective cover, so that dust impurities are prevented from adhering to the outer surface of the first heat sink fin, hindering the contact between the first heat sink fin and the air, and affecting the heat dissipation efficiency of the first heat sink fin. The heat is taken away by the heat exchange between the cold air and the first heat sink fin, thereby dissipating heat inside the filter body, and the two alternating heat sinks can blow away the dust impurities adhering to the filter, thereby ensuring the dust filtering performance of the filter.

[0015] 2. The utility model achieves the effect of reducing power consumption by arranging a temperature sensor. The temperature inside the filter body is monitored by the temperature sensor. When the temperature inside the filter body is not high and the internal heat can be dissipated only by the first heat dissipation fins, the heat dissipation plate and the second heat dissipation fins, the cooling fan stops working. When the temperature inside the filter body cannot dissipate the internal heat only by the first heat dissipation fins, the heat dissipation plate and the second heat dissipation fins, the sensor controls the two cooling fans to work through the timing switch to increase the air flow inside the protective cover.

[0016] 3. The utility model achieves the effect of facilitating the disassembly and assembly of the filter through the socket and the limit groove. When installing the filter, the mesh frame is inserted into the inside of the protective cover from the socket, and the front and rear ends of the mesh frame are respectively located in the two limit grooves, and the installation of the filter is completed. When disassembling the filter, the filter and the mesh frame can be directly pulled out from the socket and the limit groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0020] Figure 4 It is a partial three-dimensional schematic diagram of the heat dissipation plate of the utility model.

[0021] Figure numerals: 1. fixing plate; 2. connector; 3. filter body; 4. filter screen; 5. mesh frame; 6. protective cover; 7. timing switch; 8. heat sink; 9. temperature sensor; 10. vent; 11. limit groove; 12. socket; 13. cooling fan; 14. annular groove; 15. sealing ring; 16. first cooling fin; 17. second cooling fin. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiment 1

[0024] like Figure 1-Figure 4As shown, the utility model proposes a high-low frequency mixed filter with a protective structure, including a filter body 3, a heat sink 8 and a protective cover 6 are fixedly installed on the upper surface of the filter body 3, and the heat sink 8 is located inside the protective cover 6, and vents 10 are symmetrically arranged at both sides of the outer surface of the protective cover 6, a plurality of first heat sink fins 16 are uniformly welded on the upper surface of the heat sink 8, a plurality of second heat sink fins 17 are uniformly welded on the lower surface of the heat sink 8, and the second heat sink fins 17 pass through the filter body 3, an annular groove 14 is arranged near the edge of the lower surface of the heat sink 8, and a sealing ring 15 is arranged inside the annular groove 14, and the heat sink 8 is fixed to the filter body 3 by screws. The upper surface of the filter body 3 is provided, and the sealing ring 15 inside the annular groove 14 seals the gap between the heat sink 8 and the filter body 3 to prevent humid air or water from entering the filter body 3 along the gap between the heat sink 8 and the filter body 3, from the gap between the second heat dissipation fin 17 and the filter body 3. Cooling fans 13 are fixedly installed at both sides of the protective cover 6, and mesh frames 5 are arranged at positions near the outer sides of the two cooling fans 13 inside the protective cover 6. Filters 4 are fixedly installed inside the two mesh frames 5, and a timing switch 7 is fixedly installed on the top of the inner wall of the protective cover 6, and the two cooling fans 13 are electrically connected to the timing switch 7.

[0025] When the utility model is in use, the heat inside the filter body 3 is transferred to the heat sink 8 and the first heat sink 16 through the second heat sink fins 17, and the two heat sink fans 13 work alternately and periodically under the control of the timing switch 7, so that the external cold air periodically enters the inside of the protective cover 6 from the two vents 10 respectively, and before entering the protective cover 6, the impurities in the air are filtered out through the filter 4 to prevent dust and impurities from adhering to the outer surface of the first heat sink 16, thereby preventing the contact between the first heat sink 16 and the air from being hindered and affecting the heat dissipation efficiency of the first heat sink 16. The heat is taken away by the heat exchange between the cold air and the first heat sink fins 16, thereby dissipating the heat inside the filter body 3, and the two alternating heat sinks 13 can blow away the dust and impurities adhering to the filter 4, thereby ensuring the dust filtering performance of the filter 4.

[0026] Embodiment 2

[0027] like Figure 1-Figure 3As shown, the utility model proposes a high and low frequency mixed filter with a protective structure. Compared with the first embodiment, this embodiment also includes a temperature sensor 9 fixedly installed inside the filter body 3, and the temperature sensor 9 is electrically connected to the timing switch 7, and fixing plates 1 are welded at positions close to the lower surface on both sides of the outer surface of the filter body 3, and mounting holes for screws to pass through are provided on the upper surfaces of the two fixing plates 1 to facilitate the fixed installation of the filter body 3, and connectors 2 are fixedly connected at positions on both sides of the outer surface of the filter body 3, and the filter body 3 is electrically connected to the cable through the connector 2.

[0028] In this embodiment, the temperature inside the filter body 3 is monitored by a temperature sensor. When the temperature inside the filter body 3 is not high and the internal heat can be dissipated only by the first heat dissipation fins 16, the heat dissipation plate 8 and the second heat dissipation fins 17, the cooling fan 13 stops working. When the temperature inside the filter body 3 cannot dissipate the internal heat only by the first heat dissipation fins 16, the heat dissipation plate 8 and the second heat dissipation fins 17, the sensor 9 controls the two cooling fans 13 to work through the timing switch 7, increases the air flow inside the protective cover 6, and can take away more heat from the first heat dissipation fins 16 and the heat dissipation plate 8, so that the inside of the filter body 3 is quickly cooled down.

[0029] Embodiment 3

[0030] like Figure 1-Figure 3 As shown, the utility model proposes a high and low frequency mixed filter with a protective structure. Compared with the first embodiment, this embodiment also includes sockets 12 symmetrically provided on both sides of the upper surface of the protective cover 6, and the two mesh frames 5 pass through the two sockets 12 respectively, and limit grooves 11 are symmetrically provided on both sides of the inner wall of the protective cover 6 near the front surface and the rear surface.

[0031] In this embodiment, when installing the filter 4, the mesh frame 5 is inserted into the interior of the protective cover 6 from the socket 12, and the front and rear ends of the mesh frame 5 are respectively located in the two limit grooves 11, and the installation of the filter 4 is completed. When removing the filter 4, the filter 4 and the mesh frame 5 can be directly pulled out from the socket 12 and the limit groove 11, thereby facilitating the disassembly and assembly of the filter 4.

[0032] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A high- and low-frequency mixed filter with a protective structure, comprising a filter body (3), characterized in that: A heat sink (8) and a protective cover (6) are fixedly mounted on the upper surface of the filter body (3), and the heat sink (8) is located inside the protective cover (6). Ventilation holes (10) are symmetrically arranged at positions on both sides of the outer surface of the protective cover (6). A plurality of first heat sink fins (16) are evenly welded on the upper surface of the heat sink (8), and a plurality of second heat sink fins (17) are evenly welded on the lower surface of the heat sink (8), and the second heat sink fins (17) pass through the filter body (3). Heat sink fans (13) are fixedly mounted at positions on both sides of the protective cover (6). A mesh frame (5) is arranged inside the protective cover (6) near the outer sides of the two heat sink fans (13), and filters (4) are fixedly mounted inside the two mesh frames (5). A timing switch (7) is fixedly mounted on the top of the inner wall of the protective cover (6).

2. A high- and low-frequency mixed filter with a protective structure according to claim 1, characterized in that: The two cooling fans (13) are both electrically connected to the timing switch (7).

3. The high- and low-frequency mixed filter with a protective structure according to claim 1, characterized in that: A temperature sensor (9) is fixedly installed inside the filter body (3), and the temperature sensor (9) is electrically connected to the timing switch (7).

4. The high- and low-frequency mixed filter with a protective structure according to claim 1, characterized in that: Sockets (12) are symmetrically arranged at positions on both sides of the upper surface of the protective cover (6), and the two net frames (5) pass through the two sockets (12) respectively. Limiting grooves (11) are symmetrically arranged at positions near the front surface and the rear surface on both sides of the inner wall of the protective cover (6).

5. The high- and low-frequency mixed filter with a protective structure according to claim 1, characterized in that: An annular groove (14) is provided on the lower surface of the heat dissipation plate (8) near the edge, and a sealing ring (15) is provided inside the annular groove (14).

6. The high- and low-frequency mixed filter with a protective structure according to claim 1, characterized in that: Fixing plates (1) are welded to positions close to the lower surface on both sides of the outer surface of the filter body (3).

7. The high- and low-frequency mixed filter with a protective structure according to claim 1, characterized in that: Connectors (2) are fixedly connected at positions on both sides of the outer surface of the filter body (3).

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