CN214228760U

CN214228760U - Anti-interference filter

Info

Publication number: CN214228760U
Application number: CN202120390815.0U
Authority: CN
Inventors: 刘相慧; 杨战英; 刘斌
Original assignee: Ganzhou Hongkang Electronic Technology Co ltd
Current assignee: Ganzhou Hongkang Electronic Technology Co ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-09-17
Anticipated expiration: 2031-02-22

Abstract

The utility model discloses an anti-interference filter, including casing and bottom, polyurethane layer and copper foil layer have set gradually on the inside lateral wall of casing, the inboard bottom of casing is provided with the card edge all around, lower part fixedly connected with mount in the inboard of casing, the middle part fixedly connected with motor of mount, the fixedly connected with flabellum in the pivot of motor, the top fixed connection of mount is at the bottom middle part of heat dissipation grid tray. The utility model discloses in, on the heat-conducting plate that at first the filtering component will produce after working for a certain time on the circuit board, the heat-conducting plate is again with heat transfer to the heat dissipation grid tray on, the rethread motor drives the fan blade and rotates the heat that will dispel the heat on the grid tray fast and effluvium to this is filtering component and the quick heat dissipation cooling of circuit board, prolongs the life of wave filter, further promotes wave filter anti-electromagnetic interference's performance through polyurethane layer cooperation copper foil layer, is worth wideling popularize.

Description

Anti-interference filter

Technical Field

The utility model relates to a wave filter technical field especially relates to an anti-interference wave filter.

Background

The filter is a filter circuit composed of a capacitor, an inductor and a resistor, the filter can effectively filter a frequency point of a specific frequency in a power line or frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency, the filtering is an important concept in signal processing, the filter circuit in the direct current stabilized power supply has the function of reducing alternating current components in pulsating direct current voltage as much as possible and keeping direct current components of the alternating current components, so that the ripple coefficient of the output voltage is reduced, and the waveform becomes smoother.

Although most of existing filters are small in size, the heat conduction efficiency is reduced due to the fact that the internal heat dissipation space is limited, heat cannot be dissipated due to long-time heat accumulation, the service life of the filters is influenced, and the anti-interference performance of most of filters is low, and the stability of the filters is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcomings existing in the prior art and providing an anti-interference filter.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an anti-interference filter, includes casing and bottom, polyurethane layer and copper foil layer have set gradually on the inside lateral wall of casing, the inboard bottom of casing is provided with the card all around and follows, lower part fixedly connected with mount in the inboard of casing, the middle part fixedly connected with motor of mount, the fixedly connected with flabellum in the pivot of motor, the top fixed connection of mount is at the bottom middle part of heat dissipation grid tray, the top fixedly connected with heat-conducting plate of heat dissipation grid tray, the top of heat-conducting plate is provided with the insulating layer, be provided with the circuit board on the insulating layer, be provided with the filtering component on the circuit board, the top of bottom is close to the fixed limit of edge fixedly connected with all around, the outside lower part on fixed limit is provided with the draw-in groove, the middle part of bottom is provided with radiator grille.

As a further description of the above technical solution:

and a nameplate is arranged in the middle of the top end of the shell.

As a further description of the above technical solution:

four equal fixedly connected with footing in corner in bottom of bottom.

As a further description of the above technical solution:

and an output interface is arranged in the middle of the front end of the filtering component and penetrates through the shell.

As a further description of the above technical solution:

and the middle part of the rear end of the filtering component is provided with an input interface which penetrates through the shell.

As a further description of the above technical solution:

the clamping edge is clamped with the clamping groove.

As a further description of the above technical solution:

and a dustproof net is arranged on the heat dissipation grid in the middle of the top end of the bottom cover.

The utility model discloses following beneficial effect has:

1. the utility model discloses in, on the heat-conducting plate that the heat that will produce after at first the filtering subassembly worked certain time on the circuit board, the heat-conducting plate was again with heat transfer to the heat dissipation grid tray on, the rethread motor drove the fan blade and rotates, blows off the heat on the heat dissipation grid tray from the heat dissipation grid of bottom fast to this is filtering subassembly and the quick cooling that looses of circuit board, prolongs the life of wave filter.

2. The utility model discloses in, be provided with polyurethane layer and copper foil layer on the inside lateral wall of casing, the polyurethane layer possesses higher mechanical strength and oxidative stability, provides insulation protection around circuit region to isolated outside electromagnetic interference, the copper foil layer also has electromagnetic shield's effect, further promotes wave filter anti-electromagnetic interference's performance through polyurethane layer cooperation copper foil layer, is worth wideling popularize.

Drawings

Fig. 1 is an overall structural diagram of an anti-interference filter according to the present invention;

fig. 2 is a split structure diagram of an anti-interference filter according to the present invention;

fig. 3 is a bottom split structure diagram of an anti-interference filter according to the present invention;

fig. 4 is an enlarged view of a portion a in fig. 2.

Illustration of the drawings:

1. a housing; 2. a bottom cover; 3. an output interface; 4. an input interface; 5. a nameplate; 6. footing; 7. a filtering component; 8. a circuit board; 9. an insulating layer; 10. a heat conducting plate; 11. a heat dissipation grid plate; 12. a fixed mount; 13. a motor; 14. a fan blade; 15. fixing the edge; 16. a card slot; 17. a dust screen; 18. clamping edges; 19. A heat dissipation grid; 20. a polyurethane layer; 21. and a copper foil layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides an embodiment: an anti-interference filter comprises a shell 1 and a bottom cover 2, a polyurethane layer 20 and a copper foil layer 21 are sequentially arranged on the inner side wall of the shell 1, the polyurethane layer 20 has higher mechanical strength and oxidation stability, insulation protection is provided around a circuit region, thereby isolating external electromagnetic interference, the copper foil layer 21 also has an electromagnetic shielding effect, the anti-electromagnetic interference performance of the filter is further improved by matching the polyurethane layer 20 with the copper foil layer 21, a clamping edge 18 is arranged around the bottom end of the inner side of the shell 1, a fixing frame 12 is fixedly connected to the middle lower part of the inner side of the shell 1, a motor 13 is fixedly connected to the middle part of the fixing frame 12, fan blades 14 are fixedly connected to a rotating shaft of the motor 13, the top end of the fixing frame 12 is fixedly connected to the middle part of the bottom end of a heat dissipation grid plate 11, a heat conduction plate 10 is fixedly connected to the top end of the heat dissipation grid plate 11, and an insulation layer 9 is arranged on the top end of the heat conduction plate 10, be provided with circuit board 8 on insulating layer 9, be provided with filtering component 7 on the circuit board 8, the top of bottom 2 is close to edge fixedly connected with fixed limit 15 all around, the outside lower part of fixed limit 15 is provided with draw-in groove 16, the middle part of bottom 2 is provided with radiator grille 19, at first filtering component 7 will produce heat transfer to heat-conducting plate 10 after working certain time on circuit board 8, heat-conducting plate 10 is again with heat transfer to radiator grille 11 on, rethread motor 13 drives flabellum 14 and rotates, blow off the heat on the radiator grille 11 from radiator grille 19 of bottom 2 fast, use this for filtering component 7 and the quick heat dissipation cooling of circuit board 8, the life of extension wave filter.

The top middle part of casing 1 is provided with data plate 5, the equal fixedly connected with footing 6 of four corners in bottom of bottom 2, and the front end middle part of filtering subassembly 7 is provided with output interface 3 and runs through casing 1, and the rear end middle part of filtering subassembly 7 is provided with input interface 4 and runs through casing 1, and card edge 18 and draw-in groove 16 block are provided with dust screen 17 on the heat dissipation grid 19 at bottom 2 top middle part.

The working principle is as follows: firstly, the filtering component 7 works on the circuit board 8 for a certain time and then transfers the generated heat to the heat conducting plate 10, the heat conducting plate 10 transfers the heat to the heat dissipation grid plate 11, then the motor 13 drives the fan blades 14 to rotate, the heat on the heat dissipation grid plate 11 is quickly blown out from the heat dissipation grid 19 of the bottom cover 2, the heat dissipation grid plate and the heat conducting plate are used for quickly dissipating heat and cooling the filtering component 7 and the circuit board 8, the service life of the filter is prolonged, the polyurethane layer 20 and the copper foil layer 21 are arranged on the inner side wall of the shell 1, the polyurethane layer 20 has high mechanical strength and oxidation stability, insulation protection is provided around the circuit area, external electromagnetic interference is isolated, the copper foil layer 21 also has an electromagnetic shielding effect, and the electromagnetic interference resistance of the filter is further improved by matching the polyurethane layer 20 with the copper foil layer 21.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. An anti-interference filter, includes casing (1) and bottom (2), its characterized in that: the novel fan-shaped heat dissipation device is characterized in that a polyurethane layer (20) and a copper foil layer (21) are sequentially arranged on the inner side wall of the shell (1), a clamping edge (18) is arranged on the periphery of the inner bottom end of the shell (1), a fixing frame (12) is fixedly connected to the middle lower portion of the inner side of the shell (1), a motor (13) is fixedly connected to the middle portion of the fixing frame (12), fan blades (14) are fixedly connected to a rotating shaft of the motor (13), the top end of the fixing frame (12) is fixedly connected to the middle portion of the bottom end of the heat dissipation grid plate (11), a heat conduction plate (10) is fixedly connected to the top end of the heat dissipation grid plate (11), an insulating layer (9) is arranged on the top end of the heat conduction plate (10), a circuit board (8) is arranged on the insulating layer (9), a filtering component (7) is arranged on the circuit board (8), and a fixing edge (15) around the top end of the bottom cover (2) is close to the periphery, the lower part of the outer side of the fixed edge (15) is provided with a clamping groove (16), and the middle part of the bottom cover (2) is provided with a heat dissipation grid (19).

2. The antijam filter of claim 1, further comprising: and a nameplate (5) is arranged in the middle of the top end of the shell (1).

3. The antijam filter of claim 1, further comprising: four corners of the bottom end of the bottom cover (2) are fixedly connected with bottom feet (6).

4. The antijam filter of claim 1, further comprising: the middle part of the front end of the filtering component (7) is provided with an output interface (3) and the output interface (3) penetrates through the shell (1).

5. The antijam filter of claim 1, further comprising: and an input interface (4) is arranged in the middle of the rear end of the filtering component (7), and the input interface (4) penetrates through the shell (1).

6. The antijam filter of claim 1, further comprising: the clamping edge (18) is clamped with the clamping groove (16).

7. The antijam filter of claim 1, further comprising: and a dustproof net (17) is arranged on the heat dissipation grid (19) in the middle of the top end of the bottom cover (2).