CN210899095U

CN210899095U - Folding low pass filter

Info

Publication number: CN210899095U
Application number: CN201921688503.7U
Authority: CN
Inventors: 张书玉; 王婷
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-06-30
Anticipated expiration: 2029-10-10

Abstract

The utility model discloses a folding low pass filter, which comprises a housin, the inside fixedly connected with wave filter of casing, the heat dissipation strip that the equal fixedly connected with equidistance in the upper surface of wave filter and the bottom surface of wave filter was arranged, the equal fixedly connected with fin of the left and right sides face of wave filter, every the ventilation hole has all been seted up in the front of fin, two the equal fixedly connected with electron fan in a side that the fin was kept away from each other, the last fixed surface of casing is connected with the output terminal, the bottom surface fixedly connected with input terminal of casing. This folding low pass filter through the effect of heat dissipation strip and fin, can make the heat transfer on the wave filter, has reduced the heat of wave filter itself, avoids appearing the phenomenon of high temperature breakdown, through the cooperation of rotating electrical machines, change, blade, mount and louvre and ventilation hole and exhaust hole, can realize the cooling to the fin to the inside cooling effect of wave filter has been realized.

Description

Folding low pass filter

Technical Field

The utility model relates to a wave filter technical field specifically is a folding low pass filter.

Background

The filter is an electronic device which can make useful frequency signal pass through and can simultaneously inhibit useless frequency signal, and is usually used in the fields of signal processing, data transmission and interference inhibition, etc., and its active low-pass filter circuit is formed from integrated operational amplifier and passive element resistor and capacitor, and its function is to allow the signal from zero to a certain cut-off frequency to pass through without attenuation, and has the inhibition action for other frequency signal, and the active low-pass filter circuit can be used for filtering high-frequency interference signal.

The low-pass filter is an electronic filter device which allows signals lower than a cut-off frequency to pass, but signals higher than the cut-off frequency cannot pass, the filters are used in various electrical appliances for a long time, and a circuit board of the electrical appliance is provided with a plurality of electronic components, so that great heat is generated in the operation process, the currently used filters generally cool by natural heat dissipation, the heat dissipation effect is poor, and the high-temperature breakdown of the filters is easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a folding low pass filter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a folding low-pass filter comprises a shell, wherein a filter is fixedly connected inside the shell, the upper surface of the filter and the bottom surface of the filter are fixedly connected with radiating strips which are arranged equidistantly, radiating fins are fixedly connected on the left side surface and the right side surface of the filter, a ventilating hole is formed in the front surface of each radiating fin, an electronic fan is fixedly connected on one side surface, away from each other, of the two radiating fins, an output terminal post is fixedly connected on the upper surface of the shell, an input terminal post is fixedly connected on the bottom surface of the shell, radiating holes which are arranged equidistantly are formed in the left side surface and the right side surface of the shell, a cover plate is arranged on the front surface of the shell, a fixing frame is fixedly connected on the inner wall of each electronic fan, a rotating motor is fixedly connected on one side surface, away from each, the outer surface of each swivel is fixedly connected with blades which are arranged equidistantly, and two side faces, far away from each other, of the electronic fans are fixedly connected with dust screens.

Preferably, the upper surface of the shell and the bottom surface of the shell are fixedly connected with symmetrical fixing plates, and the front surface of each fixing plate is provided with a fixing hole.

Preferably, the inside of the shell is fixedly connected with symmetrical fixed blocks, the front of each fixed block is provided with a threaded hole, the front of the cover plate is provided with symmetrical screws, and the outer surface of each screw is in threaded connection with the inner wall of each threaded hole.

Preferably, the front fixed connection pilot lamp of apron, the surface of pilot lamp all is equipped with the lamp shade.

Preferably, the front surface of the cover plate is fixedly connected with a ventilation plate, and the front surface of the ventilation plate is provided with exhaust holes which are arranged at equal intervals.

Preferably, the front surface of the housing is fixedly connected with symmetrical support columns, and the number of the support columns is at least four.

Advantageous effects

The utility model discloses possess following beneficial effect:

1. the filter can be conveniently installed and fixed by arranging the fixing plate and the fixing hole outside the shell, the filter can be conveniently connected with an external electronic element by the input terminal and the output terminal, the cover plate can be fixed by matching the fixing block, the threaded hole and the screw, the cover plate can be conveniently opened for maintenance, and the back of the shell is provided with the support column, so that the shell is prevented from being integrally contacted with a circuit board, the heat dissipation area is increased, and the heat dissipation effect is improved;

2. through the effect of heat dissipation strip and fin, can make the heat transfer on the wave filter, reduce the heat of wave filter itself, avoid appearing the phenomenon of high temperature breakdown, through the cooperation of rotating electrical machines, change, blade, mount and louvre and ventilation hole and exhaust hole, can realize the cooling to the fin to the inside cooling effect of wave filter has been realized.

Drawings

Fig. 1 is a sectional view of the housing of the present invention;

fig. 2 is a front view of the housing of the present invention;

fig. 3 is a rear view of the housing of the present invention;

fig. 4 is a side view of the electronic fan of the present invention.

In the figure: the novel electronic fan comprises a shell 1, an electronic fan 2, a threaded hole 3, an input terminal 4, an output terminal 5, a fixing hole 6, a heat dissipation strip 7, a filter 8, a heat dissipation fin 9, a heat dissipation hole 10, a fixing block 11, a fixing plate 12, an indicator light 13, a lampshade 14, a cover plate 15, an exhaust hole 16, a screw 17, a support column 18, a swivel 19, a fixing frame 20, a blade 21, a vent hole 22, a rotating motor 23 and a dustproof net 24.

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.

Referring to fig. 1-4, the present invention provides a technical solution: a folding low-pass filter comprises a shell 1, wherein symmetrical fixing plates 12 are fixedly connected to the upper surface of the shell 1 and the bottom surface of the shell 1, a fixing hole 6 is formed in the front surface of each fixing plate 12 and can be conveniently installed and fixed, a filter 8 is fixedly connected to the inside of the shell 1, heat dissipation strips 7 which are arranged equidistantly are fixedly connected to the upper surface of the filter 8 and the bottom surface of the filter 8, heat dissipation fins 9 are fixedly connected to the left side surface and the right side surface of the filter 8, a ventilation hole 22 is formed in the front surface of each heat dissipation fin 9, an electronic fan 2 is fixedly connected to one side surface, away from each other, of the two heat dissipation fins 9, an output terminal 5 is fixedly connected to the upper surface of the shell 1, an input terminal 4 is fixedly connected to the bottom surface of the shell 1, heat dissipation holes 10 which are, the symmetrical fixed block 11 of inside fixedly connected with of casing 1, threaded hole 3 has all been seted up in the front of every fixed block 11, the front of apron 15 is equipped with symmetrical screw 17, the surface of every screw 17 respectively with the inner wall threaded connection of threaded hole 3, can effectual realization apron 15 fixed, the easy access, apron 15's positive fixed connection pilot lamp 13, pilot lamp 13's surface all overlaps and is equipped with lamp shade 14, can be convenient for observe operating condition, facilitate the use.

The equal fixedly connected with mount 20 of the inner wall of every electron fan 2, the equal fixedly connected with rotating electrical machines 23 in a side that two mounts 20 kept away from each other, the equal fixedly connected with swivel 19 of output of every rotating electrical machines 23, the equal fixedly connected with equidistance blade 21 of arranging of the equal fixedly connected with in surface of every swivel 19, the equal fixedly connected with dust screen 24 in a side that two electron fans 2 kept away from each other, apron 15's positive fixedly connected with ventilating board 25, the exhaust hole 16 that the equidistance was arranged is seted up in ventilating board 25's front, can improve the radiating effect, the symmetrical support column 18 of positive fixedly connected with of casing 1, the quantity of support column 18 is four at least, can increase heat radiating area, and the radiating effect is.

The working principle is as follows: during the use, at first with casing 1 through fixed plate 12 and fixed orifices 6, make the device fix on the circuit board, make support column 18 contact circuit board, increase heat radiating area, then insert the circuit with input terminal 4 and output terminal 5, when the wave filter 8 produced heat, at first with heat transmission to heat dissipation strip 7 and fin 9 on, then drive swivel 19 through rotating electrical machines 23, make swivel 19 drive blade 21 cool down fin 9, utilize the cooperation of louvre 10 and exhaust hole 16, ventilate and dispel the heat.

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

Claims

1. A folded low-pass filter comprising a housing (1), characterized in that: the filter is characterized in that a filter (8) is fixedly connected inside the shell (1), the upper surface of the filter (8) and the bottom surface of the filter (8) are fixedly connected with radiating strips (7) which are arranged equidistantly, radiating fins (9) are fixedly connected on the left side surface and the right side surface of the filter (8), a ventilation hole (22) is formed in the front surface of each radiating fin (9), two radiating fins (9) are fixedly connected with an electronic fan (2) on the side surface away from each other, an output terminal (5) is fixedly connected on the upper surface of the shell (1), an input terminal (4) is fixedly connected on the bottom surface of the shell (1), radiating holes (10) which are arranged equidistantly are formed in the left side surface and the right side surface of the shell (1), a cover plate (15) is arranged on the front surface of the shell (1), and a fixing frame (20) is, two the equal fixedly connected with rotating electrical machines (23) in a side that mount (20) kept away from each other, every the equal fixedly connected with swivel (19) of output of rotating electrical machines (23), every the equal fixedly connected with equidistant blade (21) of arranging of surface of swivel (19), two the equal fixedly connected with dust screen (24) in a side that electron fan (2) kept away from each other.

2. A folding low-pass filter according to claim 1, characterized in that: the upper surface of casing (1) and the bottom surface of casing (1) all fixedly connected with symmetrical fixed plate (12), every fixed plate (12) the front has all seted up fixed orifices (6).

3. A folding low-pass filter according to claim 1, characterized in that: the inside fixedly connected with of casing (1) is symmetrical fixed block (11), every screw hole (3) are all seted up in the front of fixed block (11), the front of apron (15) is equipped with symmetrical screw (17), every the surface of screw (17) respectively with the inner wall threaded connection of screw hole (3).

4. A folding low-pass filter according to claim 1, characterized in that: the front fixed connection pilot lamp (13) of apron (15), the surface of pilot lamp (13) all is equipped with lamp shade (14).

5. A folding low-pass filter according to claim 1, characterized in that: the front face of the cover plate (15) is fixedly connected with a ventilating plate (25), and the front face of the ventilating plate (25) is provided with exhaust holes (16) which are arranged at equal intervals.

6. A folding low-pass filter according to claim 1, characterized in that: the front surface of the shell (1) is fixedly connected with symmetrical support columns (18), and the number of the support columns (18) is at least four.