CN215352798U

CN215352798U - Air filter

Info

Publication number: CN215352798U
Application number: CN202120519947.9U
Authority: CN
Inventors: 周海健; 朱林卿; 张昭
Original assignee: American Air Filte Suzhou Co ltd
Current assignee: American Air Filte Suzhou Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-12-31
Anticipated expiration: 2031-03-09

Abstract

The utility model discloses an air filtering device which comprises a box body, a chemical filter and a buffer frame arranged between the chemical filter and the box body, wherein the buffer frame comprises a frame and a separation cover which is connected with the frame and is concavely arranged in a buffer cavity, the separation cover is arranged on a control box and is provided with a separation cavity, the separation cavity is provided with an opening communicated with the outside, and the separation cover separates the separation cavity from the buffer cavity. Through setting up the buffering frame, install the chemical filter at the top of box, the installation and the change of chemical filter are simple and convenient, and the size of chemical filter can be designed bigger, the rotational speed of fan can reduce under the condition of the same amount of wind, the resistance of chemical filter also correspondingly reduces, the filter material medium in the chemical filter can contact with the air current better, increase the residence time of air current, improve chemical filter's absorption filtration efficiency, the energy consumption of fan reduces simultaneously, the noise reduces, many-sided effect makes whole running cost greatly reduced.

Description

Air filter

Technical Field

The utility model relates to the field of air filtration, in particular to an air filtration device.

Background

The air filtering device is widely applied to clean rooms of semiconductors, liquid crystal manufacturing, medicines, aerospace military industry and the like, is an air purifying device which is arranged in a suspended ceiling keel and machine equipment and is used for reducing the particle concentration in the air, and in the production and manufacturing process, the air often contains organic solvents, plasticizers, acidity, alkalinity or other chemical components and needs to be filtered by a chemical filter.

The conventional installation method of the chemical filter 1a may be divided into an upper installation type and a lower installation type, the upper installation type is as shown in fig. 1, the chemical filter 1a is installed at the upstream of the fan, but in order to avoid the power control box 1c, the size of the chemical filter 1a is smaller than that of the box body 1b, the cross-sectional area is reduced, in order to generate the same air volume as that designed for the box body 1b, the fan needs a larger rotation speed, the energy consumption and noise are increased, and in addition, the increase of the air speed causes the filtering effect of the chemical filter 1a to be deteriorated.

The bottom-mounted type is, for example, CN203823957U or CN203220838U, and the chemical filter is assembled in the box body and is arranged at the downstream of the fan, and the downstream of the chemical filter is also provided with other filters for filtering particle impurities, such as HEPA filters. Because the particulate matter concentration in the clean room is few and is circulating filtration all the time, so HEPA filter life can exceed 10 years, and chemical filter's life-span is about 1 year ~ 2 years, and when needing to be changed chemical filter, the chemical filter change of undermount formula is extremely complicated work, needs to demolish the HEPA filter earlier, has still destroyed the filter paper in the HEPA easily when changing extremely inconvenient, directly influences HEPA's efficiency.

The structural design of the chemical filter in the existing air filtering device is not reasonable enough.

Disclosure of Invention

In order to solve the problem that the structural design of a chemical filter in the prior art is not reasonable enough, the utility model aims to provide an air filtering device which is convenient to install and replace, good in filtering effect and small in energy consumption of the whole machine.

In order to achieve the above object of the present invention, an embodiment of the present invention provides an air filtering device, including a box body and a chemical filter, wherein the box body includes a top wall, a ventilation opening and a control box, the ventilation opening and the control box are disposed on the top wall, the air filtering device further includes a buffer frame, the buffer frame is disposed between the top wall and the chemical filter and covers the ventilation opening, the box body, the chemical filter and the buffer frame surround a buffer cavity, the buffer frame includes a frame and a separation cover connected to the frame and recessed into the buffer cavity, the separation cover is disposed on the control box and has a separation cavity, the separation cavity has an opening communicated with the outside, and the separation cover separates the separation cavity from the buffer cavity.

As a further improvement of the utility model, the box body further comprises a side wall, and the frame is flush with the side wall.

As a further improvement of the utility model, the chemical filters are arranged in a plurality of groups, the chemical filters are stacked on one side of the buffer frame far away from the box body, and the side edge of each group of chemical filters is flush with the frame.

As a further improvement of the utility model, the top wall is provided with a limit groove, and the frame is clamped in the limit groove.

As a further improvement of the utility model, the height of the buffer frame is not less than 10 cm.

As a further improvement of the utility model, the air flow direction is from the chemical filter to the box body through the buffer chamber, and a particle filter is arranged at the downstream of the chemical filter.

As a further improvement of the utility model, the buffer frame is placed above the top wall and the chemical filter is placed above the buffer frame.

As a further improvement of the utility model, the box body is arranged in a cubic structure, the buffer frame comprises four frames which surround to form a rectangle, and each frame is arranged flush with the box body.

As a further improvement of the utility model, a plurality of beams are arranged between the oppositely arranged frames, and the top surface of at least one beam facing the chemical filter is flush with the top surface of the frame facing the chemical filter.

As a further improvement of the utility model, a handle is arranged on the side surface of the buffer frame.

Compared with the prior art, the utility model has the following beneficial effects: through setting up the buffering frame, install the chemical filter at the top of box, the installation and the change of chemical filter are simple and convenient, and separate the cover through setting up, make the design size of cushion chamber need not reduce the size because of the control box, the size of chemical filter can design bigger, the rotational speed of fan can reduce under the condition of the same amount of wind, the resistance of chemical filter also correspondingly reduces, the filter material medium in the chemical filter can contact with the air current better, increase the residence time of air current, improve chemical filter's absorption filtration efficiency, the energy consumption of fan reduces simultaneously, the noise reduces, many-sided effect makes whole running cost greatly reduced.

Drawings

FIG. 1 is a schematic view of a prior art air filtration unit;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic view of a buffer rack according to an embodiment of the present invention;

FIG. 4 is a structural diagram of another perspective view of a buffer frame according to an embodiment of the utility model;

wherein, 1a, a chemical filter; 1b, a box body; 1c, a power supply control box; 1. a buffer frame; 101. a buffer chamber; 102. a separation chamber; 11. a frame; 12. a separation cover; 121. an opening; 13. a cross beam; 14. a handle; 2. a box body; 21. a top wall; 211. a control box; 22. a side wall; 3. a chemical filter; 4. a particulate filter.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It will be understood that terms used herein such as "upper," "above," "lower," "below," and the like, refer to relative positions in space and are used for convenience in description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

An embodiment of the present invention provides an air filtration apparatus, in which a chemical filter is fixed at an upstream of a fan through a buffer frame, and the buffer frame avoids a structure on a box body, so that the chemical filter has a larger area, is easy to replace, and has a good filtration effect and low energy consumption.

The cavity filter device of the present embodiment may adopt FFU, and the embodiment shown in fig. 2 is also described by taking FFU as an example, but the structure of the buffer frame 1 may also be adopted in other types of filters, such as EFU.

Specifically, the air filter device of this embodiment, including box 2 and chemical filter 3, and set up buffer frame 1 between the roof 21 of box 2 and chemical filter 3, roof 21 of box 2 sets up vent and control box 211, and buffer frame 1 covers the vent, and box 2, chemical filter 3 and buffer frame 1 surround out cushion chamber 101, and the air current circulation direction is for blowing to box 2 through cushion chamber 101 from chemical filter 3, so set up on the one hand and make to take off chemical filter 3 and change and need not to enter into box 2 in, and it is good to the support of chemical filter 3 is fixed.

In addition, a particle filter 4 is arranged at the downstream of the chemical filter 3, and since the chemical filter 3 filters the gas, the gas is mainly filtered by physical adsorption and chemical adsorption reaction through the adsorption medium in the filter screen of the chemical filter 3. Since particles are generated in the chemical filter 3 itself by the purge of the air flow, the chemical filter 3 needs to be installed strictly upstream of the particulate filter 4 in order to avoid the blowing out of the particles of the chemical filter 3 itself, and the particulate filter 4 may be a HEPA filter or an ULPA filter.

In order to clearly express the positions and directions described in the present embodiment, the direction of the reference gravity is defined as the lower direction and the opposite direction is defined as the upper direction in the present embodiment. In production, place buffer frame 1 in roof 21 top, chemical filter 3 places in buffer frame 1 top, and when setting up like this, need not fixedly, through buffer frame 1 and chemical filter 3's own weight to and the circulation direction of air current be top-down, just can be with stable the fixing on buffer frame 1 of chemical filter 3, so also can refer to the installation direction in the actual production, and chemical filter 3 is the top for the direction of box 2. In other installation environments, the plurality of components of the present embodiment may be installed obliquely by the fixing member.

The buffer frame 1 includes a frame 11 and a partition cover 12 connected to the frame 11 and recessed into the buffer chamber 101, as shown in fig. 2 to 4, the partition cover 12 covers the control box 211 and has a partition chamber 102, the partition chamber 102 has an opening 121 communicating with the outside, and the partition cover 12 partitions the partition chamber 102 from the buffer chamber 101. Unlike the embodiment described in the background art, as shown in fig. 1, the present embodiment solves the problem that the chemical filter 3 cannot be made large by providing the separation cover 12, and during operation, the control box 211 is operated by entering the separation chamber 102 through the opening 121 without contacting the buffer chamber 101, but the chemical filter 3 can be optionally provided above the separation chamber 102, as shown in fig. 2, the chemical filter 3 can be made larger.

Under the condition that the downstream particle filter 4 needs the same air output, for example, the air output is 0.45m/s, the total pressure of the fan is 310Pa, through experimental detection, by adopting the structure described in the background art, the surface air speed of the chemical filter 3 is 0.8m/s, and when adopting the structure of the embodiment, the surface air speed of the chemical filter 3 is 0.5m/s, so that the rotating speed of the fan can be reduced under the condition that the air speed passing through the chemical filter 3 is the same as the air output, the resistance of the chemical filter 3 is correspondingly reduced, the filter material medium in the chemical filter 3 can be better contacted with the air flow, the retention time of the air flow is increased, the adsorption and filtration efficiency of the chemical filter 3 is improved, meanwhile, the energy consumption of the fan is reduced, the noise is reduced, and the overall operation cost is greatly reduced due to the multi-aspect effect.

Further, as shown in fig. 2, the box body 2 further includes a side wall 22, and the frame 11 is flush with the side wall 22. The box 2 sets up to the cube structure, and buffer frame 1 includes four frames 11 that enclose into the rectangle, and every frame 11 all flushes the setting with box 2. This arrangement reduces the waste of space above the top wall 21 and makes more use of the space above.

And, chemical filter 3 sets up a plurality of groups, and a plurality of groups chemical filter 3 fold and locate the one side of keeping away from box 2 of buffer frame 1, and the side of every group chemical filter 3 all flushes the setting with frame 11, and a plurality of groups chemical filter 3 can be including removing the acid, removing the alkali, removing multiple type chemical filter 3 such as VOCs.

In addition, a plurality of cross beams 13 are arranged between the oppositely arranged frames 11, and the top surface of at least one cross beam 13 facing the chemical filter 3 is flush with the top surface of the frame 11 facing the chemical filter 3, as shown in fig. 3 or 4, so that the cross beam 13 can be used for supporting while the chemical filter 3 is supported by the frame 11, and in addition, the other cross beams 13 can increase the strength of the buffer frame 1.

Or, can set up the spacing groove on the roof 21, frame 11 joint in the spacing groove prevents to put the dislocation when buffering frame 1, plays the effect of accurate positioning, when buffering frame 1 places on roof 21, falls into the spacing groove and can fix a position.

And, handle 14 is arranged on the side of buffer frame 1, which is convenient for production, maintenance and installation.

Further, the height of the buffer frame 1 is not less than 10cm, the experiment is preferable, the height is not less than 15cm, the buffer frame 1 is set to be above the height, the purpose is to provide a larger volume of the buffer cavity 101, a fan is generally arranged in the box body 2 and drives airflow to blow to the particle filter 4 through the chemical filter 3, the air speed at the inlet of the fan is large and can basically exceed 6-7 m/s, and in order to ensure that the airflow and the chemical filter 3 have more residence time, the buffer frame 1 is designed to be above the height so that the air is fully contacted with the chemical filter 3. On the other hand, the air current of wind gap department is more urgent, and the wind pressure is great, and the wind pressure of other positions is less, and the wind speed is also little, can lead to chemical filter 3 to be close to the position in wind gap under such circumstances and excessively used, and the filtering material of other positions is consumed very slowly, has reduced life, so with buffer 1 design this more than high for the atmospheric pressure of each position is more even, and the wind speed is stable, avoids the air current of local position too anxious, has prolonged life.

Compared with the prior art, the embodiment has the following beneficial effects:

through setting up buffer frame 1, install chemical filter 3 at the top of box 2, chemical filter 3's installation and change are simple and convenient, and through setting up separation cover 12, make buffer chamber 101's design size need not reduce the size because of control box 211, chemical filter 3's size can be designed bigger, the rotational speed of fan can be reduced under the condition of the same amount of wind, chemical filter 3's resistance also correspondingly reduces, the filter material medium in chemical filter 3 can contact with the air current better, increase the residence time of air current, improve chemical filter 3's adsorption filtration efficiency, the energy consumption of fan reduces simultaneously, the noise reduction, many-sided effect makes whole running cost greatly reduced.

Through the height of adjustment buffer frame 1, the space volume of design cushion chamber 101 for the atmospheric pressure of each position of chemical filter is more even, and the wind speed is stable, avoids the air current of local position too fast, has prolonged life, has improved the filter effect.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. An air filtering device comprises a box body (2) and a chemical filter (3), wherein the box body (2) comprises a top wall (21), a ventilation opening and a control box (211) which are arranged on the top wall (21), and a buffer frame (1), the buffer frame (1) is arranged between the top wall (21) and the chemical filter (3) and covers the ventilation opening, the box body (2), the chemical filter (3) and the buffer frame (1) surround a buffer cavity (101), the buffer frame (1) comprises a frame (11) and a separation cover (12) which is connected with the frame (11) and is concavely arranged in the buffer cavity (101), the separation cover (12) is covered on the control box (211) and is provided with a separation cavity (102), and the separation cavity (102) is provided with an opening (121) communicated with the outside, the separation cover (12) separates the separation chamber (102) from the buffer chamber (101).

2. An air filtering device according to claim 1, characterized in that the box (2) further comprises side walls (22), the border (11) being arranged flush with the side walls (22).

3. The air filtering device according to claim 1, wherein the chemical filters (3) are arranged in groups, the groups of chemical filters (3) are stacked on one side of the buffer frame (1) far away from the box body (2), and the side edge of each group of chemical filters (3) is flush with the frame (11).

4. An air filtering device according to claim 1, wherein the top wall (21) is provided with a limiting groove, and the frame (11) is clamped in the limiting groove.

5. An air filtering device according to claim 1, characterized in that the height of the cushioning shelf (1) is not less than 10 cm.

6. An air filtering device according to claim 1, characterized in that the direction of air flow is from the chemical filter (3) through the buffer chamber (101) to the housing (2), and downstream of the chemical filter (3) a particle filter (4) is arranged.

7. An air filtering device according to claim 1, characterized in that the buffer frame (1) is placed above the top wall (21) and the chemical filter (3) is placed above the buffer frame (1).

8. An air filtering device according to claim 1, characterized in that the box body (2) is provided in a cubic structure, and the buffer frame (1) comprises four frames (11) enclosing a rectangle, and each frame (11) is flush with the box body (2).

9. An air filtering device according to claim 8, characterized in that a number of cross beams (13) are arranged between oppositely arranged side frames (11), the top surface of at least one of said cross beams (13) facing the chemical filter (3) being flush with the top surface of the side frame (11) facing the chemical filter (3).

10. An air filter device according to claim 1, characterized in that the cushioning rack (1) is provided with a handle (14) on its side.