CN214972454U

CN214972454U - Air filtering system

Info

Publication number: CN214972454U
Application number: CN202120600827.1U
Authority: CN
Inventors: 张达
Original assignee: American Air Filte Suzhou Co ltd
Current assignee: American Air Filte Suzhou Co ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-12-03
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses an air filtering system, which comprises a box body, a filtering part and an air pressure detection device, wherein an air flow channel is formed in the box body; the filter part is arranged in the airflow channel, and an upstream space and a downstream space are respectively formed on two sides of the filter part; the air pressure detection device is simultaneously connected with an upstream connecting pipeline and a downstream connecting pipeline, the upstream connecting pipeline is communicated with the upstream space, and the downstream connecting pipeline is communicated with the downstream space. This air filtration system judges the current filtration resistance of filter house through obtaining the differential pressure of filter house upper reaches and low reaches, and its testing result is more accurate for current EFU's testing result, more can reflect the operating condition of filter house, and can continuously show air filtration system's current differential pressure, and convenience of customers grasps current operating condition in real time, just knows current filter screen when not needing waiting to report to the police and appears unusually to make the machine reach more excellent performance state.

Description

Air filtering system

Technical Field

The utility model relates to an air filtration field especially relates to an air filtration system.

Background

The EFU (electronic fan filter unit) is widely applied to clean rooms of semiconductors, liquid crystal manufacturing, medicines, aerospace, military and the like, is an air purification device which is arranged in a ceiling keel and machine Equipment, and filters dirty air by an HEPA (high efficiency particulate air) filter screen or an ULPA (ultra high efficiency particulate air) filter screen to regenerate and supply clean air.

The existing EFU can judge the resistance of a filter by comparing the pressure difference between the inside and the outside of a box body generally, and alarm is given when the resistance exceeds an alarm value, which brings some problems, for example, the pressure difference between the inside and the outside of the box body does not necessarily reflect the current resistance of the filter, especially the pressure difference between the front side and the back side of the filter, and alarm is given only when the resistance exceeds the alarm value, a user cannot acquire the current working state of a filtering system in real time, in the environment of a dust-free workshop, the filtering net needs to be replaced if the inside of the EFU is in production, the filtering net of the EFU is generally arranged on a roof, needs to be replaced on the roof, cannot be completed quickly, the user cannot prepare for going and going, the current production cannot be stopped immediately, but the environment of the dust-free room is influenced by the air filtering problem, so that the user is in a very passive state and the use experience is not good.

Disclosure of Invention

In order to solve the problems in the prior art, the present invention aims to provide an air filtration system.

In order to achieve the above object, an embodiment of the present invention provides an air filtration system, including:

a box body, wherein an airflow channel is formed in the box body;

the filter part is arranged in the airflow channel, and an upstream space and a downstream space are respectively formed on two sides of the filter part;

the air pressure detection device is simultaneously connected with an upstream connecting pipeline and a downstream connecting pipeline, the upstream connecting pipeline is communicated with the upstream space, and the downstream connecting pipeline is communicated with the downstream space.

As a further improvement of the present invention, the filtering portion includes a filtering body and a through hole passing through the filtering body, the downstream connecting line is disposed in the upstream space and includes a downstream connecting port, which is inserted into the through hole and passes through the through hole communicating with the downstream space.

As a further improvement of the present invention, the through hole is provided in the central position of the windward side of the filter body.

As a further improvement of the utility model, the filter part is still including transversely arranging in filter the middle cross member in the middle of the body, the through-hole set up in the central point of middle cross member puts.

As a further improvement of the present invention, the filter part further includes a fixing member fixed to the through hole, the fixing member is connected to the downstream connection pipe, and seals the through hole.

As a further improvement, the mounting includes a pagoda head, the pagoda head inserts in the low reaches interface, low reaches connecting line passes through the hole intercommunication of pagoda head low reaches space.

As a further improvement of the present invention, the air filtration system further comprises a fan disposed in the upstream space, and the air outlet of the fan faces the filter unit.

As a further improvement of the present invention, the air pressure detecting device compares the pressure difference between the downstream connecting line and the upstream connecting line.

As a further improvement, the air pressure detection device comprises a display part for displaying the pressure difference and a prompt part for prompting whether the pressure difference is greater than a preset value.

As a further improvement, the air filtration system is disposed at the indoor top, and the downstream space is communicated with the indoor space below the air filtration system.

Compared with the prior art, the utility model discloses following beneficial effect has: this air filtration system judges the current filtration resistance of filter house through obtaining the differential pressure of filter house upper reaches and low reaches, and its testing result is more accurate for current EFU's testing result, more can reflect the operating condition of filter house, and can continuously show air filtration system's current differential pressure, and convenience of customers grasps current operating condition in real time, just knows current filter screen when not needing waiting to report to the police and appears unusually to make the machine reach more excellent performance state.

Drawings

FIG. 1 is a schematic view of an air filtration system according to an embodiment of the present invention;

FIG. 2 is a schematic view of an alternative aspect of an air filtration system according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an air filtration system according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

wherein, 1, a box body; 101. an upstream space; 102. a downstream space; 2. a filtering part; 21. a filter body; 22. a through hole; 23. a middle cross beam; 24. a pagoda head; 25. a seal ring; 3. an air pressure detecting device; 31. a downstream connecting line; 32. an upstream connecting line; 4. a fan.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all 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 utility model provides an air filtration system for filter the air in the dustless room, reduce the granule dust in the air, be applicable to optics electron, LCD liquid crystal and make, terminal air supply department that biological medicine, precision instruments, beverage food, PCB printing etc. required high environment to dustless grade.

The air filtering system is installed on the top of the clean room, the keel bracket is installed on the top of the clean room, the box body 1 is fixed on the keel bracket, in order to clearly express the position and the direction described in the embodiment, referring to the gravity direction, the direction of the roof relative to the ground is up, the opposite direction is down, and the air in the space above the keel bracket enters the dust removing room below through the air filtering system.

As shown in fig. 1-3, the air filtration system of the present embodiment includes a box 1, a filter part 2 and an air pressure detection device 3, the filter part 2 mainly filters particulate dust, including HEPA filter screens or ULPA filter screens, an air flow channel is formed in the box 1, the air flow passes through the air flow channel and blows to a dust-free chamber through the filter part 2, the filter part 2 is disposed in the air flow channel, an upstream space 101 and a downstream space 102 are respectively formed on two sides of the filter part 2, the air flow blows to the downstream space 102 from the upstream space 101, the air pressure detection device 3 is simultaneously connected to an upstream connecting pipeline 32 and a downstream connecting pipeline 31, the upstream connecting pipeline 32 is communicated with the upstream space 101, the downstream connecting pipeline 31 is communicated with the downstream space 102, and the air pressure detection device 3 determines the current filtering resistance of the filter part 2 by detecting the pressure difference between the upstream space 101 and the downstream space 102.

When the pressure difference is too large, it means that the degree of pollution of the filter part 2 is high at this time, the air flow in the upstream space 101 cannot smoothly pass through the filter part 2 to reach the downstream space 102, at this time, the filter part 2 should be replaced, the pressure difference directly reflects the operation state of the environment where the filter part 2 is located, the blocking condition of the filter part 2 itself to the air flow is reflected, and the detection result is accurate and reliable relative to the judgment of the pressure difference inside and outside the box body 1. And because this structure has realized obtaining the pressure differential at arbitrary moment, made things convenient for the user to monitor current state in real time, according to the length of production time, rationally arrange the time that the filter screen needs to be changed.

For example, setting a pressure difference of 200Pa for replacing the filter screen, the user may replace the filter screen according to the requirement of the production time when the filter part 2 has not reached the filtering limit, such as 190Pa, or the air pressure detecting device 3 includes three states, where more than 200Pa indicates that the filter part 2 needs to be replaced, a state between 150Pa and 200Pa indicates a warning state, and less than 150Pa indicates a normal state, and at this time, when the states are 150Pa and 200Pa, a warning is issued, and the user schedules the replacement of the filter part 2 in advance according to the production rhythm.

The filter part 2 includes a filter body 21 and a through hole 22 penetrating the filter body 21, as shown in fig. 2 or fig. 3, the filter body 21 may be a HEPA filter or an ULPA filter, the downstream connection pipe 31 is disposed in the upstream space 101, the downstream connection pipe 31 includes a downstream connection port, the downstream connection port is inserted into the through hole 22 and communicates with the downstream space 102 through the through hole 22, the downstream connection pipe 31 extending into the space is not visible in the clean room, and the overall structure is beautiful. The downstream connecting line 31 is located in the air flow path in the case 1 with only the opening of its line, i.e., the downstream connecting port, facing the through hole 22, the through hole 22 communicating with both sides of the filter body 21, i.e., the upstream space 101 and the downstream space 102, and the downstream connecting line 31 located in the upstream space 101 communicating with the downstream space 102 through the through hole 22.

Further, the through holes 22 are disposed at the center of the windward side of the filter body 21, such that the pressure in the downstream space 102 can be more fully reflected by one through hole 22, and if the through hole 22 is located at the corner, the pressure at the other side cannot be fully reflected, and there is a deviation in measuring and calculating the pressure difference.

And, the filter part 2 also includes the middle crossbeam 23 horizontally arranged in the middle of the filter body 21, the through hole 22 is arranged in the center position of the middle crossbeam 23, the material of the filter screen part of the filter body 21 is soft, and the connection can not be accurately fixed, so that the position of the middle crossbeam 23 where the filter screen part is arranged has high strength, and the filter screen part is not easy to deform when acting force is applied to the filter screen part.

The filter part 2 may be square, as shown in fig. 1 and 2, the middle cross beam 23 divides the filter body 21 into two parts, the material of the filter part may be alloy or hard plastic, the structure of the through hole 22 is a hole formed on the middle cross beam 23, the downstream connecting pipeline 31 is in butt joint with the through hole 22, the opening of the upstream connecting pipeline 32, that is, the upstream connecting port, may also be arranged above the position corresponding to the through hole 22, that is, the upstream connecting port and the downstream connecting port are in the same vertical direction, the air pressure obtained by the upstream connecting port represents the air pressure on the upstream of the whole filter body 21, the air pressure obtained by the downstream connecting port represents the air pressure on the downstream of the whole filter body 21, and the difference between the two air pressures, that is, the air pressure difference between the two sides of the whole filter body 21 is reflected.

The filter house 2 further comprises a fixing member fixed at the through hole 22, as shown in fig. 3 or 4, which is connected with the downstream connection pipe 31 and seals the through hole 22. The fixing piece comprises a pagoda head 24 and a sealing ring 25, the pagoda head 24 is arranged in the through hole 22 and is inserted into the downstream connecting port, and the downstream connecting pipeline 31 is communicated with the downstream space 102 through an inner hole of the pagoda head 24. The inside hole that runs through that sets up of pagoda head 24, downstream connector communicate with downstream space 102 through this hole, and sealing washer 25 is with pagoda head 24 except that the region of the hole that runs through seals, prevents that the gas in upstream space 101 from passing through this through-hole 22 and entering into downstream space 102 in, and sealing washer 25 can set up to silica gel, rubber, is fixed by the screw.

Further, the air filtering system further comprises a fan 4 arranged in the upstream space 101, an air outlet of the fan 4 faces the filtering portion 2, and the fan 4 drives airflow to circulate to blow the air in the upstream space 101 to the downstream space 102. The fan 4 can be an axial flow fan 4, is arranged at the top of the box body 1, blows air to the filter part 2, and a space exists between the fan 4 and the filter part 2.

Further, the air pressure detecting device 3 compares the pressure difference between the downstream connecting line 31 and the upstream connecting line 32, and may directly present the pressure difference in a digital form, or may inform different states by means of a plurality of indicator lights with different colors. Compared with the existing air pressure detection device 3, the air pressure detection device 3 detects the air pressure reaching the position of the downstream space 102 just after the air pressure passes through the filter part 2, the air pressure at the position is different from the normal air pressure in the clean room, and the differential pressure can reflect the filtering condition of the filter part 2.

The air pressure detection device 3 comprises a display part for displaying the pressure difference and a prompt part for prompting whether the pressure difference is greater than a preset value, when the pressure difference is too large, a red light can be turned on for warning, an alarm can be given through a buzzer, or a control room is connected, or the pressure difference is uploaded to a server through wired or wireless connection equipment to inform a user.

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

this air filtration system judges the current filtration resistance of filter house 2 through obtaining the pressure differential of 2 upper reaches of filter house and low reaches, and its testing result is more accurate for current EFU's testing result, more can reflect the operating condition of filter house 2, and can continuously show air filtration system's current pressure differential, and convenience of customers grasps current operating condition in real time, just knows current filter screen when not needing waiting to report to the police and appears unusually to make the machine reach more excellent performance state.

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 list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. An air filtration system, comprising:

a box body, wherein an airflow channel is formed in the box body;

2. The air filtration system according to claim 1, wherein the filter portion includes a filter body and a through hole passing through the filter body, the downstream connection pipe is provided in the upstream space, and the downstream connection pipe includes a downstream connection port inserted into the through hole and communicating with the downstream space through the through hole.

3. The air filtration system of claim 2, wherein the through-hole is disposed in a center position of a windward side of the filter body.

4. The air filtration system of claim 3, wherein the filter portion further comprises a central cross member disposed transversely across the filter body, and the through hole is disposed at a central location of the central cross member.

5. The air filtration system of claim 1, wherein the filter portion further comprises a fastener secured to the through-hole, the fastener being connected to the downstream connecting line and sealing the through-hole.

6. The air filtration system of claim 1, wherein the fixture includes a pagoda head inserted into the downstream connection port, the downstream connection line communicating with the downstream space through an internal bore of the pagoda head.

7. The air filtration system of claim 1, further comprising a fan disposed in the upstream space, an outlet of the fan facing the filter portion.

8. An air filtration system according to claim 1 wherein said air pressure sensing means compares the pressure differential between said downstream connecting line and said upstream connecting line.

9. The air filtration system according to claim 8, wherein the air pressure detection device comprises a display part for displaying the pressure difference, and further comprises a prompt part for prompting whether the pressure difference is greater than a preset value.

10. The air filtration system of claim 1, wherein the air filtration system is disposed at an indoor ceiling, and the downstream space communicates with an indoor space below the air filtration system.