CN217270704U

CN217270704U - Noise-reduction air filter

Info

Publication number: CN217270704U
Application number: CN202220535633.2U
Authority: CN
Inventors: 陈小健
Original assignee: Zhuhai Sanfam Filter Co ltd
Current assignee: Zhuhai Sanfam Filter Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-08-23
Anticipated expiration: 2032-03-10

Abstract

The utility model discloses an air cleaner of making an uproar falls belongs to filter technical field. The noise reduction air filter comprises a shell and a filter element; the filter element is fixedly arranged in the accommodating cavity of the shell; the central point of protecgulum puts and is provided with the venthole, fixedly connected with interface of giving vent to anger on the venthole, be provided with a plurality of uses on the terminal surface of protecgulum the venthole is the intake pipe of central circumference equipartition, the intake pipe stretches into hold the intracavity and with the outer peripheral face clearance fit of filter core. The utility model discloses an air cleaner simple structure can effectively reduce air cleaner's noise, specially adapted compact structure's small-size air compressor machine or vacuum pump.

Description

Noise-reduction air filter

Technical Field

The utility model relates to a filter technical field, concretely relates to air cleaner of making an uproar falls who is particularly useful for small-size air compressor machine, vacuum pump.

Background

The air filter is an important component of an air compressor, a vacuum pump or a small engine, can filter air entering the air compressor or the engine, can effectively remove impurities such as dust, particles, moisture and the like in the air, prevents the impurities from entering the compressor or the engine to cause damage to a machine head, has smaller resistance limitation, and plays a better role in protecting moving components of machine equipment, thereby being widely applied, particularly in the industries of air compressors and engines.

The air filter that admits air of vacuum pump, air compressor machine generally is directly connected with the admission valve in the market at present, and air cleaner generally designs into and sets up the air inlet from casing side or back, and the diameter of air inlet is more than or equal to the gas outlet, can make air cleaner have simple structure like this, the flow resistance is low, advantage with low costs. However, when the rotors of the vacuum pump and the air compressor rotate at high speed, large noise is generated, and the noise is transmitted to the outside through the air inlet of the air filter, so that serious noise pollution is caused to the periphery. At present, generally eliminate the noise that vacuum pump, air compressor machine rotor brought through set up comparatively complicated amortization structure on vacuum pump or air compressor machine box among the prior art. However, the small air compressor and the vacuum pump have small volume and small discharge capacity, and the external silencing structure not only greatly increases the volume and increases the cost, but also is not convenient for the small air compressor and the vacuum pump to use.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a noise reduction air filter, this air filter simple structure, small can effectively reduce air filter's noise, specially adapted compact structure's small-size air compressor or vacuum pump.

In order to solve the above problems, the utility model adopts the following technical scheme:

a noise-reducing air cleaner comprises a shell and a filter element; the filter element is fixedly arranged in the accommodating cavity of the shell; the central point of protecgulum puts and is provided with the venthole, fixedly connected with interface of giving vent to anger on the venthole, be provided with a plurality of uses on the terminal surface of protecgulum the venthole is the intake pipe of central circumference equipartition, the intake pipe stretches into hold the intracavity and with the outer peripheral face clearance fit of filter core.

Compared with the prior art, the beneficial effects of the technical scheme are as follows:

the utility model discloses a noise reduction air cleaner through set up the intake pipe in the holding chamber of casing, on the one hand through a plurality of intake pipes with the air guide-in casing, can play even flow effect, avoid the noise problem that the air current is inhomogeneous to lead to the air, the sectional area grow of air current simultaneously makes air velocity descend rapidly, avoids the air to strike the outer net of filter core well and leads to the air to form the torrent to prevent to produce pneumatic turbulent noise; in addition, noise generated by the air compressor rotor can be transmitted against the direction of air flow, sound waves of the noise are transmitted to the filter element through the air outlet connector and then absorbed by the filter paper, and the intensity of the sound waves transmitted to the air inlet pipe is greatly weakened after the sound waves are reflected and absorbed for multiple times. On the other hand, the air inlet pipe is arranged in the shell, so that the size of the filter can be reduced, the overall appearance is more attractive, and the air inlet pipe is particularly suitable for a small air compressor or a small vacuum pump with a compact structure.

As a preferred embodiment of the present invention, the air intake pipe is a straight pipe having an elongated shape.

In a preferred embodiment of the present invention, the diameter of the air inlet pipe is 1/10 to 1/5 of the diameter of the rear cover.

As the preferred embodiment of the present invention, the diameter of the air outlet port is at least twice the diameter of the air inlet pipe.

As the preferred embodiment of the utility model, the quantity of intake pipe is 3 ~ 6.

As the utility model discloses preferred embodiment, be provided with the fixed subassembly that is used for fixed filter core on the interior terminal surface of protecgulum, fixed subassembly includes installing support and screw rod, the installing support is fixed to be set up on the interior terminal surface of protecgulum, the one end and the installing support fixed connection of screw rod, the other end pass back lid and a nut and mutually support, fasten back lid and protecgulum.

As a preferred embodiment of the present invention, the filter element comprises an inner net, a filter paper and an outer net which are sequentially arranged from inside to outside, and both ends of the filter element are respectively provided with an upper end cover and a lower end cover which are hermetically connected with the inner net and the outer net; sealing gaskets are arranged between the upper end cover and the rear cover and between the lower end cover and the front cover.

As a preferred embodiment of the present invention, the upper cap, the lower cap, and the gasket are made of soft PU (polyurethane).

As a preferred embodiment of the present invention, the filter paper is a chrysanthemum-like folded porous wood pulp fiber filter paper.

As a preferred embodiment of the present invention, a spring is provided between the sealing pad and the inner end surface of the front cover.

Drawings

FIG. 1 is a cross-sectional view of a noise reducing air cleaner according to the present invention; wherein the direction indicated by the arrow is the direction of airflow;

FIG. 2 is a bottom view of the noise reduction air cleaner of the present invention;

fig. 3 is a schematic structural diagram of the filter element according to the present invention;

the reference numbers illustrate: 1. a rear cover; 2. a front cover; 3. a filter element; 31. an inner net; 32. filtering paper; 33. an outer net; 34. an upper end cover; 35. a lower end cover; 36. a gasket; 4. an air outlet interface; 5. an air inlet pipe; 6. mounting a bracket; 7. a screw; 8. and a nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and fig. 2, the noise reduction air filter provided by the present invention includes a casing as a filter main body and a filter element 3 for filtering, wherein the filter element 3 is detachably installed in the casing. Specifically, the casing comprises back lid 1 and 2 locks of protecgulums, forms the chamber that holds that is used for holding filter core 3 between back lid 1 and the protecgulum 2, and filter core 3 is fixed to be set up in the intracavity that holds of casing. The central position of the front cover 2 is provided with an air outlet, and the central axis of the air outlet is coincided with the central axis of the shell. The air outlet hole is fixedly connected with an air outlet interface 4, and the air outlet interface 4 and the air outlet hole are connected in a connecting mode including but not limited to riveting, welding or flanging. Be provided with a plurality of intake pipes 5 that use the venthole as center circumference equipartition on the terminal surface of

protecgulum

2, 5 accessible riveting of intake pipe or welded fastening are connected on protecgulum 2, the intake end face of intake pipe 5 is a little higher than the outer terminal surface of protecgulum 2 or with the outer terminal surface parallel and level of protecgulum 2, and intake pipe 5 stretches into and holds the intracavity, has effectively reduced the volume of filter, makes whole molding more pleasing to the eye, especially is fit for compact structure's small-size air compressor machine or small-size vacuum pump. The peripheral face of intake pipe 5 and the peripheral face clearance fit of filter core 3 play the effect of location to filter core 3. It is visible by the above-mentioned scheme, the utility model discloses set up intake pipe 5 in the intracavity that holds of casing, through a plurality of intake pipes 5 with the air induction in the casing, can play even flow effect to the air, avoid the inhomogeneous noise problem that leads to of air current, the sectional area grow 10 times of back air current in the air admission casing simultaneously, make air speed descend rapidly, can enough avoid air impact filter core 3's extranet 33 and lead to the air to form the torrent well, thereby prevent to produce pneumatic turbulent flow noise, simultaneously because air speed reduces, make the large granule dust in the air sink to the casing on the action of gravity, make the filter have certain gravity separation effect, the filtration efficiency of filter has been improved to a certain extent. In addition, the flow direction of the air flow in the air inlet pipe 5 is opposite to the flow direction of the air outlet interface 4, so that the energy of noise is further weakened, and the noise reduction effect is achieved; meanwhile, noise generated by the air compressor rotor is transmitted against the direction of air flow, sound waves of the noise are transmitted to the filter element 3 through the air outlet connector 4 and then absorbed by the filter paper 32, the intensity of the sound waves transmitted to the air inlet pipe 5 is greatly weakened after the sound waves are reflected and absorbed for multiple times, and the noise reduction effect is good.

In some embodiments, the air inlet pipe 5 is a straight pipe with an elongated shape, so that the cross-sectional area of the air flow entering the housing through the air inlet pipe 5 is increased, thereby slowing down the air flow. Preferably, the diameter of the air inlet pipe 5 is 1/10-1/5 of the diameter of the rear cover 1, the diameter of the air outlet connector 4 is at least twice of the diameter of the air inlet pipe 5, noise is transmitted into the accommodating cavity of the shell from the air outlet connector 4, the sectional area is enlarged, energy of the noise generates large loss, the noise is reflected and absorbed for many times by the material of the filter element 3, and finally the noise is output to the outside from the opposite slender air inlet pipe 5, so that a good noise reduction effect can be achieved. In some embodiments, the number of the air inlet pipes 5 is 3-6, as shown in fig. 2, the number of the air inlet pipes 5 is 3, the air inlet pipes 5 are circumferentially and uniformly distributed on the front cover 2, an included angle between every two air inlet pipes 5 is 120 degrees, and the air inlet pipes not only have a good air uniform flow effect, but also have a good positioning effect on the filter element 3.

In order to facilitate the disassembly and assembly of the filter, the inner end face of the front cover 2 is provided with a fixing component for fixing the filter element 3, the fixing component is positioned right above the air outlet, and the fixing component can be operated and fixed through the air outlet during the disassembly and assembly. Specifically, fixed subassembly includes installing support 6 and screw rod 7, and installing support 6 passes through connecting methods such as spot welding or riveting and fixedly sets up on the interior terminal surface of protecgulum 2 and lies in the venthole directly over, and lid 1 and a nut 8 are mutually supported after one end and installing support 6 fixed connection, the other end of screw rod 7 pass to realize the fastening lock between protecgulum 2 and the back lid 1. Front cover 2 compresses tightly filter core 3 with back lid 1 under the fastening of fixed subassembly, plays sealed effect, has the effect of isolated noise, reaches the purpose of noise reduction.

Specifically, referring to fig. 2 and 3, the filter element 3 includes an inner mesh 31, a filter paper 32, and an outer mesh 33 sequentially arranged from inside to outside, and both ends of the filter element 3 are respectively provided with an upper end cap 34 and a lower end cap 35 hermetically connected to the inner mesh 31 and the outer mesh 33. The upper and

lower caps

34 and 35 are made of soft polyurethane material or metal, preferably soft polyurethane material, which has a good absorption effect on noise. Gaskets 36 are provided between the upper cover 34 and the rear cover 1 and between the lower cover 35 and the front cover 2, and similarly, the gaskets 36 are preferably made of soft PU (polyurethane), which further increases the sound absorption effect. Further, a spring (not shown) for abutting against the filter element 3 is provided between the sealing gasket 36 and the inner end surface of the front cover 2, and an insulating gasket (not shown) is provided between the spring and the housing. Preferably, the filter paper 32 is a chrysanthemum-shaped folded porous wood pulp fiber filter paper 32, which has good air permeability, when air passes through the filter paper 32, dust particles are filtered by the filter paper 32, meanwhile, the porous structure has good noise absorption effect, and the filter paper can also be other porous filter materials.

Therefore, the utility model discloses an air flow trend of making an uproar air cleaner falls is as follows: when air enters the shell through the elongated air inlet pipe 5, the sectional area of the air flow is increased, the speed of the air flow is reduced, larger dust particles in the air are settled into the shell through the gravity settling effect, and when the air continuously penetrates through the filter element 3, impurities such as residual dust in the air are filtered by the porous wood pulp fiber filter paper 32. The noise is in the utility model discloses a direction of transfer among the air cleaner of making an uproar falls as follows: the noise is transmitted into the shell from the air outlet interface 4, the sectional area is enlarged, and the energy of the noise is lost, so that the noise reduction function is realized; when noise passes through the filter element 3, the sealing pad 36 made of soft polyurethane, the upper end cover 34, the lower end cover 35 and the porous structure of the porous wood pulp fiber filter paper 32 further absorb the noise, meanwhile, the folded wood pulp fiber filter paper 32 has a reflection effect on the noise, energy of the noise is greatly lost, and finally the noise is output to the outside from the reverse elongated air inlet pipe 5, so that the noise reducing function is good.

To sum up, the utility model provides an air cleaner simple structure, small can effectively reduce air cleaner's noise, and noise reduction effect is good, specially adapted compact structure's small-size air compressor machine or vacuum pump.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A noise-reducing air cleaner, characterized by: comprises a shell and a filter element; the filter element is fixedly arranged in the accommodating cavity of the shell; the central point of protecgulum puts and is provided with the venthole, fixedly connected with interface of giving vent to anger on the venthole, be provided with a plurality of uses on the terminal surface of protecgulum the venthole is the intake pipe of central circumference equipartition, the intake pipe stretches into hold the intracavity and with the outer peripheral face clearance fit of filter core.

2. The noise reducing air cleaner of claim 1, wherein: the air inlet pipe is a slender straight pipe.

3. A noise reducing air cleaner as claimed in claim 1 or 2, wherein: the diameter of the air inlet pipe is 1/10-1/5 of the diameter of the rear cover.

4. The noise reducing air cleaner of claim 3, wherein: the diameter of the air outlet connector is at least twice the diameter of the air inlet pipe.

5. A noise reducing air cleaner as claimed in claim 1 or 2, wherein: the number of the air inlet pipes is 3-6.

6. The noise reducing air cleaner of claim 1, wherein: the filter element fixing device is characterized in that a fixing component used for fixing the filter element is arranged on the inner end face of the front cover, the fixing component comprises a mounting support and a screw rod, the mounting support is fixedly arranged on the inner end face of the front cover, one end of the screw rod is fixedly connected with the mounting support, and the other end of the screw rod penetrates through the rear cover to be matched with a nut, so that the rear cover and the front cover are fastened.

7. The noise reducing air cleaner of claim 1, wherein: the filter element comprises an inner net, filter paper and an outer net which are sequentially arranged from inside to outside, and an upper end cover and a lower end cover which are hermetically connected with the inner net and the outer net are respectively arranged at two ends of the filter element; sealing gaskets are arranged between the upper end cover and the rear cover and between the lower end cover and the front cover.

8. The noise reducing air cleaner of claim 7, wherein: the upper end cover, the lower end cover and the sealing gasket are all made of soft PU.

9. The noise reducing air cleaner of claim 7, wherein: the filter paper is chrysanthemum-shaped folded porous wood pulp fiber filter paper.

10. The noise reducing air cleaner of claim 7, wherein: and a spring is arranged between the sealing gasket and the inner end surface of the front cover.