CN216170689U

CN216170689U - Filtering exhaust device

Info

Publication number: CN216170689U
Application number: CN202122734263.3U
Authority: CN
Inventors: 张玮; 宋杰
Original assignee: American Air Filte Suzhou Co ltd
Current assignee: American Air Filte Suzhou Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-04-05
Anticipated expiration: 2031-11-09

Abstract

The utility model provides a filtering and air exhausting device which comprises a filter main body and a test cover detachably matched with the filter main body; the filter body comprises a box body, a filter device and a downstream sampling tube, wherein a filter chamber is formed in the box body, the filter device is arranged in the filter chamber, and the downstream sampling tube is connected with the leakage test equipment; the test cover includes that inside is formed with the casing of giving out the dirt room and is used for the upstream sampling tube of being connected with leakage test equipment, wherein, the test cover will give out the dirt room and filter chamber intercommunication through giving out the dirt room air outlet and filter chamber air intake, just be provided with the mouth of giving out the dirt that is used for connecting give out the dirt equipment and give out the dirt room on the casing. The filtering and air exhausting device provided by the utility model comprises a filter main body and a test cover which is detachably matched with the filter main body, the test cover can be mounted to complete the test of the filter main body when the test is required, and the test cover is simple and convenient to mount.

Description

Filtering exhaust device

Technical Field

The utility model relates to the technical field of filters, in particular to a filtering and air exhausting device.

Background

In biosafety laboratories, biosafety plants, infectious disease hospitals and other institutions, harmful biological agents are produced during operation, and these biological agents in these chambers can be transmitted by aerosols. If the air in the room is not treated and is directly discharged into the atmosphere, the air can pollute the surrounding environment and even threaten the life health of human beings or animals. Therefore, efficient filtration is necessary for safe discharge.

The market is at the filtration exhaust device who sells, can't take a sample and detect the filter equipment upper reaches, and then can't realize testing the performance of filter after filtering exhaust device installation, more can't accomplish the test of filter integrality, consequently needs a convenient novel filtration exhaust device that can test filter performance.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a filtering and air exhausting device to solve the problems.

To achieve one of the above objects, one embodiment of the present invention provides a filter-venting device including a filter body and a test cap removably engaged with the filter body.

The filter body comprises a box body, a filtering device and a downstream sampling tube, wherein a filtering chamber is formed in the box body, the filtering device is arranged in the filtering chamber, and the downstream sampling tube is connected with the leakage testing equipment. The box body is provided with a filtering chamber air inlet and a filtering chamber air outlet, and the downstream sampling tube is arranged between the filtering device and the filtering chamber air outlet.

The test cover is detachably installed to filter chamber air intake department, wherein, the test cover includes that inside is formed with the casing of giving out dust the room and is used for the upstream sampling tube of being connected with leak testing equipment. And the test cover is communicated with the dust generating chamber and the filter chamber through the air outlet of the dust generating chamber and the air inlet of the filter chamber.

The shell of the test cover is also provided with a dust generating port for connecting a dust generating device and a dust generating chamber; the upstream sampling tube is arranged in the dust generating chamber and is positioned between the dust generating port and the air outlet of the dust generating chamber.

As a further improvement of the above technology, a housing of the test hood is further provided with a dust chamber air inlet, and the dust chamber air inlet and the dust chamber air outlet are arranged oppositely.

As a further improvement of the technology, a flow equalizing plate is further arranged in the test cover and is arranged between the dust generating port and the upstream sampling tube.

As a further improvement of the above technique, a sealing gasket is mounted between the test cap and the filter body.

As a further improvement of the above technique, a filter mounting plate is further provided in the filter chamber, the filter mounting plate is disposed between the downstream sampling tube and the filter chamber air inlet, and the filter is mounted to one side of the filter mounting plate facing the filter chamber air inlet.

As a further improvement of the above technology, a filter pressing mechanism is further disposed in the filter chamber, and the filter pressing mechanism is disposed on a side of the filter mounting plate facing the air inlet of the filter chamber.

As a further improvement of the above technology, the filtering and exhausting device further comprises a first blind plate which can be opened or closed and is arranged at the air outlet of the filtering chamber, and a second blind plate which can be opened or closed and is arranged at the air inlet of the dust generating chamber, wherein when the first blind plate and the second blind plate are closed, a sealed space is formed in the filtering and exhausting device.

As a further improvement of the above technology, the filter body further comprises a control chamber disposed adjacent to the filter chamber, and the control chamber is separated from the filter chamber by a partition, wherein a first sterilizing valve communicating the inside and the outside of the filter chamber is disposed in the control chamber; and a second sterilizing valve communicated with the inside and the outside of the dust generating chamber is arranged on the outer side of the shell of the testing cover.

As a further improvement of the above technology, the communication port between the first sterilizing valve and the filtering chamber is arranged between the filtering device and the air outlet of the filtering chamber.

As a further improvement of the technology, the filtering and air exhausting device also comprises a recovery device which is detachably matched with the filter main body, and the recovery device comprises a bag sleeving ring and a filter device recovery bag which are detachably matched with the periphery of the air inlet of the filter chamber.

Compared with the prior art, the utility model has the beneficial effects that: the filtering and air exhausting device provided by the utility model comprises a filter main body and a test cover which is detachably matched with the filter main body, the test cover can be mounted when a test is needed to finish the test of the filter main body, and the test cover is simple and convenient to mount.

Drawings

Fig. 1 is a perspective view of a filter-exhaust device in an embodiment of the present invention.

Fig. 2 is a schematic connection diagram of the filter air exhausting device in an embodiment of the present invention, which is cooperatively connected with an external leak testing device, a sterilizing device and a dust generating device, wherein a main body portion of the filter is schematically depicted in a transverse cross-section to facilitate understanding of an internal layout and a device connection manner.

Fig. 3 is a perspective view of a filter body of a filtering exhaust device according to an embodiment of the present invention.

Fig. 4 is an internal structural view of the filter body shown in fig. 3.

Fig. 5 is a perspective view of a test hood of a filter exhaust device in accordance with an embodiment of the present invention.

Fig. 6 is an internal structural view of the test cap shown in fig. 5.

Fig. 7 is a perspective view of the filter-exhaust device of fig. 1 with the first and second blind plates closed.

Fig. 8 is a perspective view of another angle of the filter-exhaust device of fig. 7.

Fig. 9 is a schematic view of the filter body and the recovery device of the filtering and exhausting device of the present invention.

Fig. 10 is a partially exploded view of the filter-exhaust device of fig. 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "front", "rear", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Fig. 1 is a perspective view of a filtering and exhausting device according to an embodiment of the present invention, and fig. 2 is a schematic connection diagram of the filtering and exhausting device in an embodiment of the present invention, which is cooperatively connected with an external leak testing device, a sterilizing device, and a dust generating device.

As shown in fig. 1 and 2, an embodiment of the present invention provides a filtering exhaust device 10, the filtering exhaust device 10 including a filter body 20 and a test cap 30 detachably engaged with the filter body 20.

As shown in fig. 3 to 4, the filter body 20 includes a box 220 having a filtering chamber 210 formed therein, a filtering device 230 disposed in the filtering chamber 210, and a downstream sampling pipe 240 for connecting with the leak testing apparatus 40. The box 220 is further provided with a filter chamber air inlet 221 and a filter chamber air outlet 222, and the downstream sampling tube 240 is disposed between the filter device 230 and the filter chamber air outlet 222.

Optionally, the box 220 is a rectangular parallelepiped structure, and the filter chamber air inlet 221 and the filter chamber air outlet 222 are oppositely disposed at the front end and the rear end of the box 220. In other embodiments of the present invention, the filter chamber inlet 221 and the filter chamber outlet 222 may be disposed on the side wall of the box 220.

Further, the box 220 further includes a control chamber 250 disposed adjacent to the filter chamber 210, and the control chamber 250 is separated from the filter chamber 210 by a partition 251. The downstream sampling tube 240 is inserted into the filtering chamber 210, and the downstream sampling tube 240 is provided with a downstream sampling port 242 in the control chamber 250 to connect with the leak testing apparatus 40.

In an embodiment of the present invention, the filtering device 230 is disposed in the filtering chamber 210, and the filtering device 230 is disposed in the filtering chamber 210 and near the filtering chamber air inlet 221.

In the use process of the filter exhaust device 10, the filter device 230 needs to be replaced frequently, so as to facilitate the replacement and installation of the filter device 230, a filter device mounting plate 231 is further disposed in the filter chamber 210, the filter device mounting plate 231 is disposed between the downstream sampling pipe 240 and the filter chamber air inlet 221, and the filter device 230 is mounted on the side of the filter device mounting plate 231 facing the filter chamber air inlet 221. Alternatively, the filter 230 may be movably coupled to the filter mounting plate 231 by bolts or the like.

Wherein, the filtering device mounting plate 231 is welded on the inner wall of the filtering chamber 210, and the middle of the filtering device mounting plate 231 is provided with an opening for the air in the filtering chamber 210 to flow.

Further, a filter pressing mechanism 232 is further disposed in the filter chamber 210, and the filter pressing mechanism 232 is disposed on a side of the filter mounting plate 231 facing the filter chamber air inlet 221. The filtering device 230 is fixed on the filtering device pressing mechanism 232 through the filtering device pressing mechanism 232, and the filtering device pressing mechanism 232 fixes the filtering device 230 in a rapid pressing mode, so that the operation is convenient, and the fixation is reliable.

In an embodiment of the present invention, the test hood 30 is detachably mounted to the filter chamber air inlet 221. A sealing gasket 260 is provided between the test cap 30 and the filter body 20 during operation of the test cap 30 so that no gas leakage occurs between the test cap 30 and the filter body 20. The sealing gasket 260 can be directly fixed around the filter chamber air inlet 221 of the filter body 20 or around the dust chamber air outlet 311 of the test enclosure 30 to form a seal between the test enclosure 30 and the filter body 20 when the two are butted.

Further, as shown in fig. 5 and 6, the test hood 30 includes a housing 320 having a dust chamber 310 formed therein and an upstream sampling tube 330 for connection with the leak test apparatus 40. And the test cover 30 is communicated with the dust chamber 310 and the filter chamber 210 through the dust chamber air outlet 311 and the filter chamber air inlet 221.

In one embodiment of the present invention, the housing 320 has a bottom plate 323, a top plate 324, a first side plate 325, a second side plate 326, and an end cap 327. The end cover 327 is disposed opposite to the dust chamber air inlet 312, and the first side plate 325 and the second side plate 326 extend upward from the bottom plate 323 and are located at left and right sides of the end cover 327.

The dust chamber air outlet 311 is disposed on the end cover 327, and accordingly, the dust chamber air inlet 312 and the dust chamber air outlet 311 are disposed oppositely. The dust chamber inlet 312 is configured to allow the experimental component released from the dust tube 322 to flow into the filter body 20.

In an embodiment of the present invention, the housing 320 is provided with a dust generating port 321 for connecting the dust generating device 50 and the dust generating chamber 310. Specifically, the dust outlet 321 is disposed on the top plate 324. And the dust outlet 321 is connected with a dust pipe 322 in the dust chamber 310 to uniformly discharge the test component such as the test dust or aerosol generated by the dust generating device 50 into the dust chamber 310. And the dust tube 322 has small holes throughout it to allow the test composition to be thoroughly mixed with the air in the dust chamber 310.

In an embodiment of the present invention, in order to make the upstream sampling tube 330 have a better collecting effect, the upstream sampling tube 330 is disposed in the dust chamber 310 and located between the dust outlet 321 and the dust chamber air outlet 311, and the upstream sampling tube 330, the dust outlet 321 and the dust chamber air inlet 312 are in the same straight line.

Further, in order to improve the testing efficiency and accelerate the air flow in the filtering and exhausting device 10, an air supply fan may be externally connected to the dust chamber air inlet 312. In other embodiments of the present invention, a suction fan may be externally connected to the outlet 222 of the filtering chamber to accelerate the air flow in the filtering exhaust device 10.

A flow equalizing plate 340 is further disposed in the test hood 30, and the flow equalizing plate 340 is disposed between the dust generating port 321 and the upstream sampling tube 330. The flow equalizing plate 340 is provided with small holes for fully mixing the experimental components released by the dust pipe 322 with the air in the dust chamber 310, so that the simulated experimental environment is more authentic and has better testing effect.

Further, the flow equalizing plate 340 may be fixed inside the test hood 30 by welding or bolting.

In an embodiment of the present invention, to facilitate the mounting and dismounting of the test cover 30, the first side plate 325 and the second side plate 326 of the housing 320 are correspondingly provided with a handle 328.

As shown in fig. 7 and 8, the filtering and exhausting device 10 further includes a first blind plate 223 capable of being opened or closed and disposed at the outlet 222 of the filtering chamber, and a second blind plate 314 capable of being opened or closed and disposed at the inlet 312 of the dust generating chamber, wherein the first blind plate 223 and the second blind plate 314 form a closed space in the filtering and exhausting device 10 when closed. The first blind plate 223 and the second blind plate 314 are disposed to form a closed space in the filtering exhaust device 10.

The first blind plate 223 is movably fixed to the filtering chamber air outlet 222, and the second blind plate 314 is also movably fixed to the dust chamber air inlet 312. Optionally, the first and second

blind plates

223 and 314 are fixed to the filter chamber air outlet 222 and the dust chamber air inlet 312 by means of bolts.

After the service life of the filter device 230 in the filtering exhaust device 10 has expired, the filter device 230 needs to be replaced, but before the filter device 230 is replaced, in order to avoid leakage of the contaminants remaining on the filter device 230, the environment is damaged, and even the people are damaged.

In an embodiment of the present invention, a first sterilizing valve 212 is further disposed in the control chamber 250 and communicates the inside and the outside of the filtering chamber 210. Meanwhile, a second sterilizing valve 313 communicating the inside and the outside of the dust chamber 310 is disposed outside the housing 320 of the test hood 30. Wherein the first disinfection valve 212 and the second disinfection valve 313 are externally connected with the disinfection device 60 to form a disinfection circulation loop.

Wherein, the communication port 213 of the first sterilizing valve 212 and the filtering chamber 210 is arranged between the filtering device 230 and the filtering chamber air outlet 222. The arrangement here enables a more thorough sterilization of the filter body 20 and the filter device 230 and a greater degree of recycling of the sterilization gas.

The second sterilizing valve 313 is disposed on the top plate 324 of the housing 320, and the connection port between the second sterilizing valve 313 and the housing 320 is disposed between the flow equalizing plate 340 and the upstream sampling tube 330.

In an embodiment of the present invention, an air pressure gauge 252 for detecting a change in air pressure in the space formed between the test cover 30 and the filter body 20 is further disposed in the control chamber 250 of the filter body 20. In the testing process, a certain pressure of gas is filled into the space formed between the testing cover 30 and the filter body 20, and the pressure change of the space is monitored by a pressure gauge, so that the air tightness test of the filter body 20 is completed.

As shown in fig. 9 and 10, after the service life of the filtering device 230 in the filtering and exhausting device 10 is over, the filtering device 230 needs to be replaced, in order to prevent the harm to the operator caused by the insufficient disinfection and the pollutants which are difficult to disinfect in the residual part of the filtering device 230. In one embodiment of the present invention, the filter-exhaust device 10 further comprises a recycling device 70 detachably engaged with the filter main body 20, and the recycling device 70 comprises a bag-sleeving ring 71 and a filter-device recycling bag 72 detachably engaged with the periphery of the filter-chamber air inlet 221.

Optionally, the filter recovery bag is a PVC replacement bag made of PVC material.

The bag-sleeving ring 71 can be movably mounted to the filter chamber air inlet 221 through a fixing plate 712 disposed inside the bag-sleeving ring. By arranging the recovery device 70, the filter device 230 can be replaced in a relatively sealed environment when the filter device 230 is replaced, so that the filter device 230 cannot contact the atmosphere in the replacement process, the life health and safety of workers are ensured, and the diffusion of pollutants is avoided.

Therefore, the filtering exhaust device 10 provided by the utility model can complete the following work: the filter exhaust device 10 can complete the integrity test of the filter device 230 according to the data difference value collected between the upstream sampling pipe 330 and the downstream sampling pipe 240; when it is judged that the filter device 230 needs to be replaced, sterilizing the filter main body 20 to prevent the leakage of the harmful material remaining on the filter device 230; meanwhile, the recovery device 70 is disposed at the filter chamber inlet 221 to complete the replacement of the filter device 230, so as to prevent the operator from being injured by harmful substances that are not sterilized in the filter device 230 during the replacement of the filter device 230.

In conclusion, the beneficial effects of the utility model are as follows: the filtering and air exhausting device 10 provided by the utility model comprises a filter main body 20 and a test cover 30 detachably matched with the filter main body 20, the test cover 30 can be mounted when a test is needed to finish the test of the filter main body 20, and the test cover 30 is simple and convenient to mount. Meanwhile, a first disinfection valve 212 is arranged in the control room 250, a second disinfection valve 313 is arranged outside the test cover 30, and the first disinfection valve 212 and the second disinfection valve 313 are both connected with the disinfection equipment 60 to form a disinfection circulation loop, so that the disinfection effect is better, and disinfection components can be recycled to a greater extent. In addition, the filtering exhaust device 10 is further provided with a recovery device 70 at the air inlet 221 of the filtering chamber, so that the harm to operators caused by part of residual pollutants difficult to disinfect in the replacement process of the filtering device 230 is avoided.

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. A filtering and air exhausting device is characterized by comprising a filter main body and a test cover detachably matched with the filter main body;

the filter body comprises a box body, a filtering device and a downstream sampling tube, wherein a filtering chamber is formed in the box body, the filtering device is arranged in the filtering chamber, the downstream sampling tube is used for being connected with the leakage test equipment, a filtering chamber air inlet and a filtering chamber air outlet are formed in the box body, and the downstream sampling tube is arranged between the filtering device and the filtering chamber air outlet;

the testing cover is detachably mounted at the air inlet of the filtering chamber, and comprises a shell with a dust generating chamber formed inside and an upstream sampling tube used for being connected with leakage testing equipment; the testing cover is used for communicating the dust generating chamber with the filter chamber through the dust generating chamber air outlet and the filter chamber air inlet;

the shell of the test cover is further provided with a dust generating port used for connecting dust generating equipment and a dust generating chamber, and the upstream sampling tube is arranged in the dust generating chamber and located between the dust generating port and an air outlet of the dust generating chamber.

2. The filtering exhaust device according to claim 1, wherein the housing of the test hood is further provided with a dust chamber inlet, and the dust chamber inlet and the dust chamber outlet are disposed opposite to each other.

3. The filtering exhaust device according to claim 1, wherein a flow equalizing plate is further disposed in the test hood, and the flow equalizing plate is disposed between the dust generating port and the upstream sampling pipe.

4. The filter air exhaust device according to claim 1, wherein a sealing gasket is installed between the test hood and the filter body.

5. The filter air exhausting device of claim 1 wherein a filter mounting plate is further disposed in the filter chamber, the filter mounting plate is disposed between the downstream sampling tube and the filter chamber air inlet, and the filter is mounted to a side of the filter mounting plate facing the filter chamber air inlet.

6. The filter air exhausting device of claim 5 wherein a filter pressing mechanism is further disposed in the filter chamber, and the filter pressing mechanism is disposed on a side of the filter mounting plate facing the air inlet of the filter chamber.

7. The filtering and exhausting device of claim 2, further comprising a first blind plate disposed at an air outlet of the filtering chamber and a second blind plate disposed at an air inlet of the dust generating chamber, wherein the first blind plate and the second blind plate form a closed space in the filtering and exhausting device when closed.

8. The filtering exhaust device according to claim 7, wherein the filter main body further includes a control chamber disposed adjacent to the filtering chamber, and the control chamber is separated from the filtering chamber by a partition, wherein a first sterilizing valve is disposed in the control chamber to communicate the inside and the outside of the filtering chamber; and a second sterilizing valve communicated with the inside and the outside of the dust generating chamber is arranged on the outer side of the shell of the testing cover.

9. The filtering and exhaust device according to claim 8, wherein the communication port of the first sterilizing valve and the filtering chamber is provided between the filtering device and the outlet port of the filtering chamber.

10. The filter air exhausting device of claim 1 further comprising a recovery device removably engaged with the filter body, the recovery device including a bag collar removably engaged with the perimeter of the air inlet of the filtering chamber and a filter recovery bag.