CN112880094A

CN112880094A - Two-stage air exhaust high-efficiency filtering device

Info

Publication number: CN112880094A
Application number: CN202110302560.2A
Authority: CN
Inventors: 郁博; 黄富余
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-06-01

Abstract

The invention provides a double-stage air exhaust high-efficiency filtering device, which comprises: the air purifier comprises a main body, wherein an air inlet is formed in the bottom of the main body, an air outlet is formed in the top of the main body, and filters are respectively installed at the air inlet and the part close to the air outlet so as to carry out double-stage filtration on air entering the air exhaust high-efficiency filtering device. The air inlet and the air outlet are respectively provided with the filter to form a two-stage filter of the high-efficiency exhaust filtering device so as to carry out two-stage filtration on the air entering the filtering device. Through the double-stage filtration, compared with the existing single-stage filtration, the filtration efficiency of the filtration device can be greatly improved, and virus and germ pollution particles can be prevented from being discharged into the atmosphere to the greatest extent, so that the safety performance of the high-efficiency exhaust filtration device is fundamentally enhanced.

Description

Two-stage air exhaust high-efficiency filtering device

Technical Field

The invention relates to the field of biosafety filtration, in particular to a double-stage air exhaust high-efficiency filtering device.

Background

Facilities such as biosafety laboratories and biopharmaceutical workshops contain viruses and germs in the operation processes of experiments, detection, production and the like, and if the viruses and germs are discharged into the atmosphere, the biological safety hidden dangers are caused, so that the air in a specific environment needs to be filtered by an exhaust efficient filtering device and then discharged.

Most of the existing exhaust high-efficiency filtering devices are single-stage filters, once the filters are damaged in the using process, particles polluted by viruses and germs can enter the ventilation pipeline at the downstream of the exhaust high-efficiency filtering devices to be spread and polluted in the ventilation pipeline, and once the polluted range of the ventilation pipeline is expanded, the disinfection and sterilization treatment is difficult to be carried out.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a two-stage air-exhaust high-efficiency filtering device, which can greatly improve the filtering efficiency of the filtering device and effectively enhance the safety performance of the air-exhaust high-efficiency filtering device.

The invention provides a double-stage air exhaust high-efficiency filtering device, which comprises: a main body which is provided with a plurality of grooves,

the air-purifying device is characterized in that an air inlet is formed in the bottom of the main body, an air outlet is formed in the top of the main body, and filters are respectively installed at the air inlet and the part close to the air outlet so as to carry out double-stage filtration on air entering the air-exhausting high-efficiency filtering device.

Furthermore, the air inlet is arranged on the side wall of the main body, and an inlet baffle for changing the air flow direction and a baffling baffle for extending the air flow path are arranged inside the main body relative to the air inlet.

Further, the filter is including installing primary filter on the air intake, primary filter with be provided with the one-level leak hunting device that is used for detecting the gaseous quality after the one-level filtration between the baffling baffle.

Further, the filter is still including installing the inside secondary filter of main part, secondary filter with be provided with the second grade leak hunting device that is used for detecting second grade filtered gas quality between the air outlet.

Further, the filtering surface of the secondary filter is horizontally arranged, and a pressure plate valve used for fixing the secondary filter is arranged inside the main body.

Further, the part of the main body corresponding to the pressure plate valve is provided with a filter door, and the filter door can be opened and closed horizontally so as to install and replace the secondary filter.

Further, one-level leak hunting device and second grade leak hunting device all include sampling portion, sampling portion is connected with the walking portion, sampling portion is along straight reciprocating motion in order to be right under the drive of walking portion the filtering surface of filter scans.

Further, the sampling part is connected with the detection part through a hose, and the detection part is used for detecting the mass of the collected gas so as to determine the leakage point position of the filter.

Further, the sampling portion includes that a plurality of phase sequences link up and be the sampling mouth that the linearity was arranged, the sampling mouth constitutes the air inlet face of the gas that awaits measuring on the sampling portion.

Further, the walking part comprises a reciprocating lead screw, and the extending direction of the reciprocating lead screw is perpendicular to the arrangement direction of the sampling ports.

The air inlet and the air outlet are respectively provided with the filter to form a two-stage filter of the air exhaust high-efficiency filter device, so that the air entering the filter device is filtered in a two-stage mode. Through the double-stage filtration, compared with the existing single-stage filtration, the filtration efficiency of the filtration device can be greatly improved, and virus and germ pollution particles can be prevented from being discharged into the atmosphere to the greatest extent, so that the safety performance of the high-efficiency exhaust filtration device is fundamentally enhanced.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 is a schematic structural diagram of a two-stage air-discharge high-efficiency filtering device according to the present invention;

FIG. 2 is a schematic structural view of the air inlet side of FIG. 1;

FIG. 3 is a schematic view of the two-stage filter in a replacement state.

In the figure: 1-main part, 11-inlet baffle, 12-baffle, 13-filter door, 2-air inlet, 3-air outlet, 4-filter, 41-first filter, 42-second filter, 5-leak detection device, 51-first leak detection device, 52-second leak detection device, 53-sampling part, 54-walking part, 55-detection part, 56-sampling port, 57-reciprocating screw, 58-screw slide block, 7-pressing block, 8-pressing plate valve, 81-connecting rod, 91-aerosol injection device, 92-aerosol homogenizing plate.

In the drawings, like parts are designated with like reference numerals, and the drawings are not to scale.

Detailed Description

In order to clearly illustrate the inventive content of the present invention, the present invention will be described below with reference to examples.

In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-2, the present invention provides a dual-stage air-exhausting high-efficiency filtering device, comprising: the air purifier comprises a main body 1, wherein an air inlet 2 is arranged at the bottom of the main body 1, an air outlet 3 is arranged at the top of the main body 1, and filters 4 are respectively arranged at the air inlet 2 and the part close to the air outlet 3 so as to carry out double-stage filtration on air entering the air exhaust high-efficiency filtering device.

The air exhaust high-efficiency filtering device is of a side air inlet structure, and air entering the filtering device is filtered in a double-stage mode and then is exhausted from the top of the filtering device. By distributing and installing the filters 4 at the air inlet 2 and the upstream position close to the air outlet 3, double-stage filtration of the air is effectively formed. Most of the existing exhaust high-efficiency filtering devices are single-stage filters, the filtering efficiency of air can be generally controlled at 99% after the air is filtered by the single stage, the air is firstly filtered by the first stage after passing through the air inlet 2 to intercept most of virus and germ particles, and the virus and germ particles in the air are further filtered before being discharged out of the filtering device from the top air outlet 3, so that the filtering efficiency can be improved to 99.99%, the filtering working condition of the existing single-stage filtering is fundamentally changed, and the biological safety of the filtering device is effectively improved.

In one embodiment, the intake vent 2 is provided on a side wall of the main body 1, and an intake baffle 11 for changing the air flow direction and a baffle 12 for extending the air flow path are installed inside the main body 1 opposite to the intake vent 2. The device main body 1 in this embodiment is a hollow square cylindrical housing, the air inlet 2 is disposed on a side wall of the square cylindrical housing, a filter for performing primary filtration on air entering the filter device is mounted on the air inlet 2, and the inlet baffle 11 and the baffle 12 are disposed inside the housing opposite to the filter.

Specifically, the filtering surface of the filter on the air inlet 2 is vertically arranged, air horizontally passing through the filter at the air inlet 2 is firstly impacted on an inlet baffle 11 which is vertically installed, then a stroke path is changed, the air is vertically deflected upwards to enter the top of the air inlet 2, the air horizontally enters the shell through a gap between the inlet baffle 11 and a deflection baffle 12, the deflection baffle 12 is specifically an L-shaped baffle which is vertically bent, the inlet baffle 11 is a flat plate which is vertically installed, the top of the inlet baffle 11 is lower than the height of a horizontal plate of the deflection baffle 12, the air horizontally flowing through the gap between the two baffles is blocked by a vertical plate of the deflection baffle 12 to further change the stroke path, the air vertically deflects downwards to enter the shell, finally enters the filtering device at the bottom end of the vertical plate of the deflection baffle 12 to be subjected to secondary filtering, and through the matching between the inlet baffle 11 and the deflection baffle 12, the circulation path of the air entering the filtering device can be, on the one hand, air entering the filtering device can be buffered between the two baffles, and on the other hand, compared with a direct entering mode, the air volume entering the filtering device can be effectively increased, so that the operation load of the filtering device is greatly improved.

The filter 4 in the embodiment comprises two stages of filters, and in order to ensure the quality of air after passing through the filter 4, a leakage detection device 5 is arranged at the downstream of each stage of filter respectively, so that potential leakage points on the filter 4 can be detected in real time, and the safety of the efficient exhaust filtering device is improved fundamentally.

Specifically, the two-stage filter comprises a first-stage filter 14 installed on the air inlet 2, and a first-stage leak detection device 51 for detecting the quality of the first-stage filtered gas is arranged between the first-stage filter 14 and the inlet baffle 11; and a secondary filter 42 arranged in the main body 1 and positioned at the upstream of the air outlet 3, wherein a secondary leakage detection device 52 for detecting the quality of the secondary filtered gas is arranged between the secondary filter 42 and the air outlet 3. The air inlet 2 and the inner wall of the main body 1 are respectively provided with a pressing block 7 for fixing the filter 4, wherein the pressing block 7 at the position of the air inlet 2 is of a foldable structure, and after the primary filter 14 is installed at the air inlet 2, the primary filter 14 is clamped and pressed through the pressing block 7 of the foldable structure, so that the primary filter 14 is fixed on the air inlet 2.

Air enters the filtering device from the air inlet 2, is filtered by the primary filter 14, and then is detected by the primary leakage detecting device 51, so as to determine whether a leakage point part exists on the primary filter 14; after the air passes through the baffle plate 12 and passes through the secondary filter 42, the quality of the air after secondary filtration is detected by a secondary leakage detection device 52, so as to determine whether a leakage point part exists on the secondary filter 42; it should be noted that the two-stage filtration leak detection device 5 may be turned on simultaneously or selectively according to actual conditions, and the present invention does not limit the specific operation state thereof.

Through setting up leak hunting device 5 in filter 4 low reaches, the air quality after can the real-time supervision filters to can in time discover the potential leak source that exists on filter 4 in the operation process, greatly strengthened the high-efficient filter equipment's of airing exhaust security performance.

In another embodiment, the filtering surface of the secondary filter 42 is horizontally arranged, the main body 1 is internally provided with a pressure plate valve 8 for fixing the secondary filter 42, the pressure plate valve 8 can stretch in the vertical direction, the inner wall of the main body 1 near the air outlet 3 is provided with a pressing block 7 fixedly installed, when the pressure plate valve 8 is turned to a vertical extending state through a connecting rod 81, the secondary filter 42 is fixed through the pressing of the pressure plate valve 8 and the pressing block 7, when the secondary filter 42 needs to be disassembled, the pressure plate valve 8 is turned to a shrinking state through the connecting rod 81, so that the secondary filter 42 is separated from the extruding state, and further the secondary filter is conveniently disassembled on the main body 1.

In order to facilitate installation and replacement of the secondary filter 42, the part of the main body 1 corresponding to the push plate valve 8 is provided with the filter door 13, the filter door 13 can be opened and closed horizontally, when the filter door 13 is in an opening state, the secondary filter 42 can be installed and replaced, and after the secondary filter 42 is fixed, the filter door 13 is closed to seal the inner space of the main body 1, so that normal filtering operation is performed. Through the briquetting 7, push-plate valve 8 and the filter door 13 that set up, can carry out fixed mounting and dismantle the change to secondary filter 42 effectively, do benefit to the maintenance of filter equipment at the operation in-process, reliably guarantee air filter equipment's normal operating.

In one preferred embodiment, each of the first-stage leak detection device 51 and the second-stage leak detection device 52 includes a sampling unit 53, the sampling unit 53 is connected to a traveling unit 54, and the sampling unit 53 is driven by the traveling unit 54 to reciprocate along a straight line to scan the filtering surface of the filter 4.

The sampling unit 53 and the traveling unit 54 are matched with each other to complete scanning of the entire filtering surface of the filter 4, and the gas to be measured entering the sampling unit 53 is detected by the detection unit 55, so that the leak point position on the filter 4 can be determined in time. The sampling unit 53 in this embodiment is connected to a detection unit 55 through a hose (not shown), and the detection unit 55 is configured to detect the mass of the collected gas to determine the leak point of the filter 4.

Specifically, sampling portion 53 in this embodiment includes that a plurality of looks prefaces link up, is the sampling opening 56 of linear arrangement, and every sampling opening 56's shape is the same, is the horn mouth of convergent form, and the opening of horn mouth is towards filter 4, and the convergent contained angle of every horn mouth is 60, is connected with the hose on its shrink mouth, and the opening concatenation of a plurality of horn mouths is in the same place, constitutes the inlet air face of the gas that awaits measuring on sampling portion 53. The width of this air inlet face is the same with the thickness of sampling port 56, and the length of air inlet face is the same with the length or the width of filter 4 (specifically with the extending direction that a plurality of sampling ports 56 looks preface links up as the standard), and the air inlet face is in order to scan filter 4's whole air-out face along straight reciprocating motion's mode.

During scanning leak detection, gas to be detected after passing through the filter 4 is discharged from the air outlet surface and the mounting frame of the filter 4, firstly flows through the air inlet surface of the sampling part 53 and enters each sampling port 56, then is conveyed to the detection part 55 through the hose corresponding to each sampling port 56 one to one, and the gas entering each sampling port 56 is detected through the detection part 55, so that once leakage of the filter 4 is found, the leakage point on the filter 4 can be quickly and timely determined through the part, facing the corresponding sampling port 56, of the filter 4.

Inside filter equipment's main part, still be provided with and be used for under filter equipment non-actual operation state, carry out the aerosol injection device 91 of leak source survey to secondary filter 42, install between aerosol injection device 91 and secondary filter 42 and make the aerosol fully disperse the aerosol in secondary filter upstream homogenize board 92, homogenize board 92 through aerosol injection device 91 and aerosol and can make aerosol evenly disperse inside main part 1, in the timing, regard the aerosol as the detection object, if secondary leak source 52 detects the aerosol at certain position on secondary filter 42, indicate to have the filtration leak source at this position, greatly improved filter equipment's detection operating mode under non-operation state, filter equipment's biosafety has been guaranteed.

The traveling part 54 in this embodiment includes a reciprocating lead screw 57, the extending direction of the reciprocating lead screw 57 is perpendicular to the arrangement direction of the sampling ports 56, a lead screw slider 58 capable of reciprocating on the reciprocating lead screw 57 is connected to the sampling part 53, and the plurality of sampling ports 56 can reciprocate linearly under the driving of the lead screw slider 58 by the cooperation of the lead screw slider 58 and the reciprocating lead screw 57. The reciprocating lead screw 57 can make the lead screw slider 58 realize reciprocating motion on the premise of not changing the rotation direction of the main shaft. The reciprocating screw 57 is specifically a form of a three-dimensional cam pair, two thread grooves with the same pitch and opposite rotation directions are arranged on the screw, two ends of the screw are connected by a transition curve, and the screw can push the screw slider 58 arranged in the spiral groove to reciprocate along the axial direction of the reciprocating screw by the side surface of the spiral groove through the rotation of the screw around the axis of the screw. The reciprocating screw 57 and the screw slider 58 in the invention can play a role of standard guiding for the sampling part 53, ensure that the sampling part 53 does not deviate when moving in the leak detection process, and ensure that the air inlet surface of the sampling part 53 can cover the whole filtering surface of the filter 4, thereby fundamentally avoiding the occurrence of sampling leak points.

Specifically, the sampling ports 56 of the primary leak detection device 51 are arranged in a phase-sequential manner in the horizontal direction, the openings of the sampling ports 56 horizontally face the air inlet 2, and the reciprocating screw rods 57 are vertically arranged to drive the integral sampling part 53 to linearly reciprocate in the vertical direction; the sampling ports 56 of the secondary leak detection device 52 are also in a form of being sequentially connected in the horizontal direction, but the openings of the sampling ports 56 are downward vertically, and the reciprocating screw rods 57 are horizontally arranged, so that the integral sampling part 53 can be driven to linearly reciprocate in the horizontal direction. Through the arrangement mode of the sampling port 56 and the reciprocating screw 57, the sampling part 53 can fully and completely collect the air on the air outlet surface of the filter 4, and the safety performance of the filter 4 is ensured to the maximum extent.

It is important to point out that, with the two-stage high-efficiency exhaust filtering device of the present invention, when one of the filters is damaged, the contaminated particles can be effectively protected from entering the downstream pipeline, so as to integrally improve the safety of the exhaust filtering device, and meanwhile, through two-stage filtering, under special working conditions, such as a virus laboratory requiring high safety, the quality of the filtered air can be greatly improved, and in combination with a leak detection device at the downstream of the filter, the quality safety of the high-efficiency exhaust filtering device to the externally discharged air can be fundamentally ensured.

Finally, it is to be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not intended to be limiting. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as within the scope of the invention.

Claims

1. A dual stage, air-venting, high efficiency filtration device, comprising: a main body which is provided with a plurality of grooves,

2. The dual-stage exhaust high-efficiency filter device according to claim 1, wherein the air inlet is disposed on a side wall of the main body, and an inlet baffle for changing the air flow direction and a baffle for extending the air flow path are installed inside the main body opposite to the air inlet.

3. The dual-stage high-efficiency exhaust filtering device according to claim 2, wherein the filter comprises a primary filter mounted on the air inlet, and a primary leak detection device for detecting the quality of the primary filtered air is arranged between the primary filter and the baffle.

4. The dual-stage high-efficiency exhaust filtering device according to claim 3, wherein the filter further comprises a secondary filter installed inside the main body, and a secondary leak detection device for detecting the quality of the secondary filtered gas is arranged between the secondary filter and the air outlet.

5. The dual-stage air-exhausting high-efficiency filtering device according to claim 4, wherein the filtering surface of the secondary filter is arranged horizontally, and a push plate valve for fixing the secondary filter is arranged inside the main body.

6. The dual-stage air-exhausting high-efficiency filtering device according to claim 5, wherein a filter door is arranged at a position of the main body corresponding to the pressure plate valve, so as to install and replace the secondary filter.

7. The two-stage air-exhausting high-efficiency filtering device according to claim 4, wherein the first-stage leak detection device and the second-stage leak detection device each comprise a sampling part, the sampling part is connected with a walking part, and the sampling part is driven by the walking part to reciprocate along a straight line to scan the filtering surface of the filter.

8. The dual-stage air-exhausting high-efficiency filtering device according to claim 7, wherein the sampling part is connected with a detection part through a hose, and the detection part is used for detecting the quality of the collected gas so as to determine the leakage point position of the filter.

9. The dual-stage air-exhausting high-efficiency filtering device according to claim 7, wherein the sampling part comprises a plurality of sampling ports which are connected in phase sequence and are linearly arranged, and the sampling ports form an air inlet surface of the gas to be measured on the sampling part.

10. The dual-stage air-exhausting high-efficiency filtering device according to claim 9, wherein the traveling part comprises a reciprocating lead screw, and the extension direction of the reciprocating lead screw is perpendicular to the arrangement direction of the sampling ports.