CN117570546A - Indoor mounting type double-stage efficient air filtering device - Google Patents

Abstract

The invention discloses an indoor mounting type two-stage efficient air filtering device which comprises a first-stage efficient filtering box body, an instrument box, a second-stage efficient air filter and a sealing valve, wherein the instrument box is arranged on the first-stage efficient filtering box body; the high-efficient filter box of one-level is vertical installs first level high-efficient air cleaner in the entry, second level high-efficient air cleaner horizontal installation sets up the instrument box in the middle of the high-efficient filter box of two-level, and the sealing valve sets up the valve seal case. According to the invention, by arranging the two-stage efficient air filter, in-situ leakage detection and disinfection can be performed, and the sealing valve is arranged in the valve sealing box, so that the sealing performance of the box body at the downstream of the filter is effectively ensured, the safety of indoor installation is effectively improved, and the indoor installation requirement is met.

Description

Indoor mounting type double-stage efficient air filtering device

Technical Field

The invention relates to the field of biological safety protection technology and equipment, in particular to an indoor mounting type double-stage efficient air filtering device.

Background

According to the related standard requirements, some biosafety facilities such as inactivated vaccine production workshops, large animal biosafety laboratories and the like, and the exhaust of a protection zone of the biosafety facilities needs to be safely treated by adopting two-stage efficient air filtration. Typically, a first stage high efficiency air filter is disposed in a biosafety room, and a second stage high efficiency air filter is disposed in a top equipment floor of the biosafety room. The design method has a certain problem in project construction and later application: firstly, a pipeline between two stages of high-efficiency air filters is in airtight connection with the high-efficiency air filters at two ends, the pipeline is airtight, and the material is resistant to disinfectant corrosion, so that the construction complexity is increased; secondly, the pipeline is longer, so that the pipeline is inconvenient to carry out integral gas (steam) fumigation and disinfection effect verification, and potential safety hazards exist.

If two-stage high-efficiency air filters are installed indoors, the problems of in-situ leakage detection and disinfection of the filters under the condition that the height of the filter device is limited and the tightness of the filter device are required to be solved, and particularly, leakage of a pipeline or a box body at the downstream of the filters to the outside environment caused by leakage of indoor harmful aerosol is avoided.

Disclosure of Invention

In order to solve the problems, the invention provides the indoor two-stage efficient air filtering device which meets the biosafety requirement, a closed pipeline is not required to be added between the two-stage efficient filters, the construction complexity of an exhaust system of biosafety facilities can be effectively reduced, and the problems of in-situ leakage detection of the indoor second-stage efficient filter and the overall tightness of the two-stage efficient air filtering device are solved.

In order to achieve the above object, the present invention provides an indoor installation type two-stage efficient air filtering device, comprising: the device comprises a device main body, wherein a horizontal air inlet, a first-stage efficient filter box body, a second-stage efficient air filter and a sealing valve are sequentially arranged in the device main body along the air flow direction; the horizontal air inlet is arranged at the bottom of the front surface of the device main body, and the first-stage high-efficiency filtering box body is fixedly connected in the device main body and is connected with the horizontal air inlet in a sealing way; an instrument box is arranged between the first-stage high-efficiency filter box body and the second-stage high-efficiency air filter; the sealing valve is fixedly connected to the top of the device main body; a first-stage efficient air filter is arranged in the first-stage efficient filter box body, and is fixed and pressed by a pressing frame bolt preferentially; the second-stage efficient air filter is fixed at the downstream of the first-stage efficient filter box body in the device main body, and the second-stage efficient air filter is connected with the device main body in a sealing way.

As an alternative embodiment, the instrument canister is provided with a faceplate; the panel is hermetically inlaid on the front surface of the device main body; the panel is provided with a first-stage high-efficiency pressure pointer gauge, a second-stage high-efficiency pressure pointer gauge and a first pressure sampling port; the first-stage high-efficiency pressure pointer gauge is used for measuring the resistance of the first-stage high-efficiency air filter passing through gas, judging whether the filter is blocked or not, and providing a judging basis for filter replacement; the second-stage efficient pressure pointer gauge is used for measuring the resistance of the second-stage efficient air filter passing through the gas; the instrument filtering and sterilizing interface is used for injecting sterilizing agent when sterilizing instrument filters at two ends of the high-efficiency pressure pointer gauge; the first sampling port is used for collecting indoor air pressure and providing pressure sampling before gas enters the first-stage efficient air filter for the first-stage efficient pressure pointer meter.

A first aerosol sampling port, a first electrical interface and a second pressure sampling meter port are fixed in the instrument box; the first aerosol sampling port is used for collecting the concentration of aerosol of indoor air passing through the first-stage high-efficiency filter; the first aerosol sampling port is connected with a first scanning sampling device at the downstream of the first-stage high-efficiency air filter; the first electrical interface is used for connecting a limit sensor of a first scanning sampling device at the downstream of the first-stage high-efficiency air filter; the second pressure sampling meter port is used for collecting air pressure between the first-stage efficient air filter and the second-stage efficient air filter, providing pressure sampling for the first-stage efficient pressure pointer meter after gas passes through the first-stage efficient air filter, and providing pressure sampling for the second-stage efficient pressure pointer meter before gas enters the second-stage efficient air filter.

A second-stage aerosol injection port is formed in the side wall, opposite to the panel, of the instrument box, and is used for injecting aerosol upstream of the second-stage high-efficiency filter; the second-stage aerosol injection port is connected with an aerosol dust-generating pipe, and the aerosol dust-generating pipe is arranged outside the instrument box; the outlet of the aerosol dust-generating pipe is positioned on the air outlet surface of the first-stage high-efficiency air filter.

The first-stage high-efficiency pressure pointer meter gas circuit is connected with the first pressure sampling port and the second pressure sampling port; the second-stage efficient pressure pointer meter gas circuit is connected with the second pressure sampling port and the third pressure sampling port; the third pressure sampling port is fixed at the downstream of the second-stage efficient filter and is used for collecting the air pressure at the downstream of the second-stage efficient filter and providing pressure sampling for the gas before the gas enters the second-stage efficient air filter for the second-stage efficient pressure pointer gauge.

As an optional implementation manner, an instrument filter module is connected between the second pressure sampling port and the third pressure sampling port and the first-level high-efficiency pressure pointer gauge and between the second-level high-efficiency pressure pointer gauge, and the instrument filter module is used for protecting the differential pressure gauge from being polluted;

preferably, the instrument filter module comprises a stop valve, an instrument filter disinfection interface and an instrument filter which are sequentially connected through connecting pipelines.

As an optional implementation manner, the first-stage efficient filter box body is a cuboid ventilating duct with an air inlet surface and an air outlet surface; the air inlet surface of the first-stage high-efficiency filter box body is connected with the horizontal air inlet in a sealing way; a first-stage efficient air filter is vertically arranged in the first-stage efficient filter box body, the second-stage efficient filter is horizontally arranged, and after indoor air passes through the horizontal air inlet, the air flow direction is vertical to the filtering surface of the first-stage efficient air filter; then, after entering the device main body, the air flows upwards under the action of air pressure, and the air flows vertically pass through a filtering surface of the second-stage high-efficiency air filter; the vertical passage of the air flow through the filter face of the filter increases the filtering efficiency.

As an alternative implementation manner, a first scanning leakage detection device is arranged at the downstream of the first-stage high-efficiency air filter, the first scanning leakage detection device is connected with a first driving motor, and the first driving motor is fixed in the instrument box.

As an alternative embodiment, a filter replacement inlet and a filter replacement outlet are arranged on the front surface of the device main body, a first sealing door is arranged outside the filter replacement inlet and the filter replacement outlet, and the position of the first sealing door corresponds to the position of the second-stage high-efficiency filter.

As an alternative embodiment, a second upstream aerosol sampling port and a disinfectant injection port are fixedly arranged on the front surface of the device main body at the upstream air inlet side of the second-stage high-efficiency filter.

And a second downstream aerosol sampling port, a disinfection indicator discharge port, a disinfection indicator placing port and a second electric interface are fixedly arranged on the front surface of the device main body at the downstream air outlet side of the second-stage high-efficiency filter.

As an optional implementation manner, a second scanning leakage detection device is arranged at the downstream of the second-stage high-efficiency filter, the second scanning leakage detection device is connected with a second driving motor, and the second driving motor is fixed at the outer side of the front surface of the device main body.

As an alternative embodiment, a valve airtight box is arranged outside the airtight valve; and the valve airtight box is internally provided with an airtight valve and a pipeline which are in airtight connection through a flange. By utilizing the valve airtight box, even if leakage occurs at the installation position of the airtight valve and the pipeline, under the sealing effect of the valve airtight box, indoor harmful pollutants can still be effectively ensured not to diffuse to the external environment through the leakage position.

As an alternative embodiment, a second sealing door is arranged on the front surface of the valve closed box. By utilizing the second sealing door, the sealing valve is convenient to check, and meanwhile, under the sealing effect of the second sealing door, harmful pollutants are effectively isolated from being diffused to the external environment.

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

1. according to the indoor-installation type double-stage efficient air filtering device, the first-stage efficient air filter is vertically installed, the instrument box is arranged between the first-stage efficient air filter and the second-stage efficient air filter, and aerosol is injected into the position of the air outlet surface of the first-stage efficient air filter, so that the upstream aerosol mixing speed of the second-stage efficient air filter can be increased, the upstream aerosol mixing distance can be effectively shortened, the height of the filtering device can be further reduced, and the indoor installation requirement can be met.

2. According to the indoor-installation-type two-stage efficient air filtering device, the two-stage efficient air filter is arranged, in-situ leakage detection and disinfection can be carried out, the sealing valve is arranged in the valve sealing box, the sealing performance of the box body at the downstream of the filter can be effectively ensured, and air which is not filtered indoors can be prevented from leaking to the exhaust system under the condition that the inside of the filtering device is negative pressure.

Drawings

FIG. 1 is a front view of an indoor mounted two-stage high efficiency air filtration device according to an embodiment of the present invention;

FIG. 2 is a side view of an indoor mounted two-stage high efficiency air filtration device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an instrument box according to an embodiment of the present invention.

Reference numerals and description:

the device comprises a 1-device main body, a 2-horizontal air inlet, a 3-first-stage high-efficiency filter box body, a 4-second-stage high-efficiency air filter, a 5-sealing valve, a 6-instrument box, a 7-first-stage high-efficiency air filter, an 8-fixed mounting frame, a 9-first-stage high-efficiency pressure pointer meter, a 10-second-stage high-efficiency pressure pointer meter, an 11-first pressure sampling port, a 12-first aerosol sampling port, a 13-first electric interface, a 14-second pressure sampling port, a 15-second-stage aerosol injection port, a 16-aerosol dust-generating pipe, a 17-third pressure sampling port, a 181-first stop valve, a 182-second stop valve, a 183-third stop valve, a 184-fourth stop valve, a 185-fifth stop valve, a 19-instrument filter disinfection interface, a 201-first instrument filter, a 202-second instrument filter, a 21-first scanning leak detection device, a 22-first driving motor, a 23-first sealing door, a 24-second upstream aerosol sampling port, a 25-disinfectant, a 26-second downstream motor, a 27-second sealing door, a 29-second sealing door, a 31-second sealing flange, a 35-third sealing flange, a first sealing flange, a second sealing flange, a 37-third sealing flange, a second pipeline, a sealing flange, a third sealing flange, a 37, a sealing flange, a third sealing flange, a sealing flange and a sealing flange, a third sealing flange, and a sealing flange.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Please refer to fig. 1 and 2. FIG. 1 is a front view of an indoor mounted two-stage high efficiency air filtration device according to an embodiment of the present invention; fig. 2 is a side view of an indoor mounted two-stage high efficiency air filtration device according to an embodiment of the present invention.

As shown in fig. 1 and 2, the indoor-mounted two-stage efficient air filtering device disclosed in the embodiment of the invention comprises: a device main body 1, wherein a horizontal air inlet 2, a first-stage high-efficiency filter box 3, a second-stage high-efficiency air filter 4 and a sealing valve 5 which can enable air flow to pass through are sequentially arranged in the device main body 1 along the air flow direction; an instrument box 6 is arranged between the first-stage high-efficiency filter box body 3 and the second-stage high-efficiency air filter 4; an air flow channel is reserved between the instrument box 6 and the side wall of the device main body 1; the horizontal air inlet 2 is arranged at the bottom of the front surface of the device main body 1, the front surface of the device main body 1 is the surface of the device main body 1 facing an operator, and the first-stage efficient filter box 3 is fixedly connected in the device main body 1 and is in sealing connection with the horizontal air inlet 2; the sealing valve 5 is fixedly connected to the top of the device main body 1; a first-stage efficient air filter 7 is arranged in the first-stage efficient filter box body 3, and is fixed and pressed by a frame pressing bolt preferentially; the device main body 1 inner wall sealing connection fixed mounting frame 8, fixed mounting frame 8 adopt welding or bolt fastening at device main body 1 inner wall, and second-stage high-efficiency air filter 4 air-out face frame contact department sets up portable frame that compresses tightly, makes second-stage high-efficiency air filter 4 compress tightly sealedly with fixed mounting frame 8 through removing the frame that compresses tightly.

In another alternative embodiment, as shown in fig. 3, the instrument canister 6 is provided with a panel; the panel is hermetically inlaid on the front surface of the device main body 1; the panel is provided with a first-stage efficient pressure pointer meter 9, a second-stage efficient pressure pointer meter 10 and a first pressure sampling port 11; the first-stage efficient pressure pointer gauge 9 is used for measuring the resistance of the first-stage efficient air filter 7 passing through the gas, judging whether the filter is blocked or not, and providing a judging basis for filter replacement; the second-stage high-efficiency pressure pointer gauge 10 is used for measuring the resistance of the second-stage high-efficiency air filter 4 passing through the gas; the instrument filtering and sterilizing interface is used for injecting sterilizing agent when sterilizing instrument filters at two ends of the high-efficiency pressure pointer; the first sampling port is used for collecting indoor air pressure and providing pressure sampling before gas enters the first-stage efficient air filter 7 for the first-stage efficient pressure pointer gauge 9.

A first aerosol sampling port 12, a first electrical interface 13 and a second pressure sampling port 14 are fixed in the instrument box 6; the first aerosol sampling port 12 is used for collecting the aerosol concentration of the indoor air passing through the first-stage high-efficiency air filter 7; the first aerosol sampling port 12 is connected with a first scanning sampling device downstream of the first-stage high-efficiency air filter 7; the first electrical interface 13 is used for connecting a limit sensor of a first scanning sampling device at the downstream of the first-stage high-efficiency air filter 7; the second pressure sampling port 14 is used for collecting air pressure between the first-stage efficient filtering box 3 and the second-stage efficient air filter 4, providing pressure sampling for the first-stage efficient pressure pointer gauge 9 after gas passes through the first-stage efficient air filter 7, and providing pressure sampling for the second-stage efficient pressure pointer gauge 10 before gas enters the second-stage efficient air filter 4.

A second-stage aerosol injection port 15 is arranged on the side wall of the instrument box 6 opposite to the panel, and the second-stage aerosol injection port 15 is used for injecting aerosol upstream of the second-stage efficient air filter 4; the second-stage aerosol injection port 15 is connected with an aerosol dust-generating tube 16, and the aerosol dust-generating tube 16 is arranged outside the instrument box 6; the outlet of the aerosol dust-generating pipe 16 is positioned on the air outlet surface of the first-stage efficient air filter 7, so that the aerosol mixing speed at the upstream of the second-stage efficient air filter 4 can be increased, the aerosol mixing distance can be effectively shortened, the height of the filtering device can be further reduced, and the indoor installation requirement can be met.

The first-stage efficient pressure pointer gauge 9 is connected with the first pressure sampling port 11 and the second pressure sampling port 14 through a gas circuit; the second-stage efficient pressure pointer gauge 10 is connected with the second pressure sampling port 14 and the third pressure sampling port 17 through gas paths; the third pressure sampling port 17 is fixed at the downstream of the second-stage efficient air filter 4, and is configured to collect the air pressure downstream of the second-stage efficient air filter 4, and provide pressure sampling for the second-stage efficient pressure pointer gauge 10 before the air enters the second-stage efficient air filter 4.

In yet another alternative embodiment, an instrument filter module is connected between the second pressure sampling port 14 and the third pressure sampling port 17 and the first-stage efficient pressure pointer gauge 9 and the second-stage efficient pressure pointer gauge 10, and the instrument filter module is used for protecting the differential pressure gauge from being polluted.

Preferably, as shown in fig. 3, the meter filter module includes: the second pressure sampling port 14 is connected with a first stop valve 181, the first stop valve 181 is connected with a first instrument filter 201, the first instrument filter 201 is connected with a second stop valve 182, and the second stop valve 182 is connected with a first-stage efficient pressure pointer gauge 9 and a second-stage efficient pressure pointer gauge 10; the third pressure sampling port 17 is connected with a third stop valve 183, the third stop valve 183 is connected with a second instrument filter 202, a filter disinfection interface is arranged between the third stop valve 183 and an instrument of the second instrument filter 202, and the second instrument filter 202 is connected with a fourth stop valve 184; downstream of the second shut-off valve 182 is connected downstream of the fourth shut-off valve 184 by a fifth shut-off valve 185. In a normal use state, the first stop valve 181, the second stop valve 182, the third stop valve 183, and the fourth stop valve 184 are opened, and the fifth stop valve 185 is closed; in the sterilized state, the first stop valve 181, the third stop valve 183, and the fifth stop valve 185 are opened, and the second stop valve 182 and the fourth stop valve 184 are closed.

In yet another alternative embodiment, the first-stage high-efficiency filter box 3 is a cuboid ventilation pipeline with an air inlet surface and an air outlet surface, and by arranging the box outside the first-stage high-efficiency filter, the probability of dispersing gas from gaps is reduced, the air flow path is controlled, the filtering efficiency is improved, and the first-stage high-efficiency filter is fixed more firmly; preferably, the air inlet surface of the first-stage high-efficiency filtering box body 3 is connected with the horizontal air inlet 2 in a sealing way through bolts; a first-stage efficient air filter 7 is vertically arranged in the first-stage efficient filter box body 3, the second-stage efficient air filter 4 is horizontally arranged, and after indoor air passes through the horizontal air inlet, the air flow direction is vertical to the filtering surface of the first-stage efficient air filter 7; then, after entering the device main body 1, the air flows upwards under the action of air pressure, and the air flows vertically pass through a filtering surface of the second-stage efficient air filter 4; the vertical passage of the air flow through the filter face of the filter increases the filtering efficiency. .

As an alternative embodiment, the ratio of the height of the device body 1 to the height of the space to be purified is not more than 0.8:1.

In yet another alternative embodiment, a first scanning leak detection device 21 is disposed downstream of the first stage high efficiency air filter 7, the first scanning leak detection device 21 is connected to a first driving motor 22, and the first driving motor 22 is fixed in the instrument box 6.

In yet another alternative embodiment, a filter replacement inlet and outlet is provided on the front surface of the device body 1, and a first sealing door 23 is provided outside the filter replacement inlet and outlet, and the position of the first sealing door 23 corresponds to the position of the second-stage high-efficiency filter 4.

Alternatively, the first sealing door 23 is fixed to the front surface of the apparatus body 1 by bolts.

In normal operation, the first sealing door 23 is closed to ensure the sealing performance of the apparatus main body 1; when the second-stage air filter 4 needs to be replaced, the first sealing door 23 needs to be opened, the second-stage efficient filter 4 is drawn out of the apparatus main body 1 through the filter replacement inlet and outlet, and a new second-stage efficient filter is pushed in.

In yet another alternative embodiment, on the upstream air inlet side of the second stage high efficiency air filter 4, a second upstream aerosol sampling port 24 and a disinfectant injection port 25 are fixedly installed on the front surface of the device main body 1, and the second upstream aerosol sampling port 24 is connected with an aerosol sampling tube inside the device main body 1.

On the downstream air outlet side of the second-stage air filter 4, a second downstream aerosol sampling port 26, a sterilization indicator discharge port 27, a sterilization indicator placement port 28, and a second electrical interface 29 are fixedly mounted on the front surface of the device body 1.

In yet another alternative embodiment, a second scanning leak detection device 30 is disposed downstream of the second stage high efficiency air filter 4, the second scanning leak detection device 30 is connected to a second driving motor 31, and the second driving motor 31 is fixed on the front outer side of the device main body 1.

In yet another alternative embodiment, the first scanning leak detection device 21 and the second scanning leak detection device 30 each include a sampling module, the sampling module is movably connected with a travelling part, a limit sensor is disposed at the top end of the travelling part, and the sampling module is driven by a driving motor to reciprocate on the travelling part so as to scan the filtering surface of the filter.

In yet another alternative embodiment, the valve enclosure 32 is disposed outside the above-mentioned enclosure valve 5; the valve airtight box 32 is internally provided with a plurality of sealing devices which are sequentially connected with each other from bottom to top: the first flange 33, one end of the first flange 33 adopts the bolt to fix on the valve airtight box 32, the other end adopts the bolt to fix the airtight valve 5, the other end of the airtight valve 5 adopts the bolt to fix the second flange 34, the upper portion of the second flange 34 is welded with the first pipeline 37, the first pipeline 37 is sleeved with the second pipeline 38 on the upper portion through the flexible connection 35, a passage is formed between the first pipeline 37 and the second pipeline 38, and the second pipeline 38 is communicated with the third flange 39 welded on the top of the airtight valve 5 in an airtight manner.

By using the valve airtight box 32, even if leakage occurs at the installation position of the airtight valve 5 and the pipeline, under the sealing effect of the valve airtight box 32, indoor harmful pollutants can still be effectively ensured not to diffuse to the external environment through the leakage position.

In yet another alternative embodiment, the valve enclosure 32 has a second sealing door 36 disposed on a front face thereof. By using the second sealing door 36, the sealing valve 5 is convenient to check, and meanwhile, under the sealing action of the second sealing door 36, harmful pollutants are effectively isolated from being diffused to the external environment.

In the description, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features being in direct contact, or the first and second features being in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature. "upstream" refers to the direction of air flow through the device and "downstream" refers to the direction of air flow out through the device.

It should be noted that when an element is referred to as being "fixed to," "disposed on" or "connected to" another element, it may be directly on the other element or there may be an element in between, and the "fixed to," "disposed on" or "connected to" may be a fixed connection, a threaded connection, an adhesive connection, a clamping connection, or the like, or one or several connection modes selected according to practical situations, and the element may be understood as a component or a part, or the like. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "manner," "particular modes," or "some modes," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or mode is included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or manner. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or ways. Furthermore, various embodiments or modes and features of various embodiments or modes described in this specification can be combined and combined by those skilled in the art without mutual conflict.

Finally, it should be noted that: the embodiment of the invention discloses an indoor installation type two-stage high-efficiency air filtering device which is only disclosed as a preferred embodiment of the invention, and is only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An indoor mounted two-stage efficient air filtering device, comprising: the device comprises a device main body (1), wherein a horizontal air inlet (2), a first-stage efficient filter box body (3), a second-stage efficient air filter (4) and a sealing valve (5) are sequentially arranged in the device main body (1) along the air flow direction; an instrument box (6) is arranged between the first-stage high-efficiency filter box body (3) and the second-stage high-efficiency air filter (4); the horizontal air inlet (2) is arranged at the bottom of the front surface of the device main body (1), and the sealing valve (5) is arranged at the top of the device main body (1); a first-stage high-efficiency air filter (7) is arranged in the first-stage high-efficiency filter box body (3).

2. The indoor mounted two-stage high efficiency air filtration device of claim 1, wherein the instrument box (6) is provided with a panel; the panel is hermetically inlaid on the front surface of the device main body (1); the panel is provided with a first-stage efficient pressure pointer (9), a second-stage efficient pressure pointer (10) and a first pressure sampling port (11); a first aerosol sampling port (12), a first electrical interface (13) and a second pressure sampling port (14) are fixed in the instrument box (6); a second-stage aerosol injection opening (15) is formed in the side wall, opposite to the panel, of the instrument box (6); the second-stage aerosol injection port (15) is connected with an aerosol dust-generating tube (16), and the aerosol dust-generating tube (16) is arranged outside the instrument box (6); the outlet of the aerosol dust-generating pipe (16) is positioned on the air outlet surface of the first-stage high-efficiency air filter (7); the first-stage high-efficiency pressure pointer (9) is connected with the first pressure sampling port (11) and the second pressure sampling port (14) through a gas circuit; the second-stage efficient pressure pointer (10) is connected with the second pressure sampling port (14) and the third pressure sampling port (17) through a gas circuit; the third pressure sampling port (17) is fixed downstream of the second stage high efficiency air filter (4).

3. The indoor mounted two-stage efficient air filtering device according to claim 2, wherein instrument filtering modules are connected between the second pressure sampling port (14) and the third pressure sampling port (17) and the first-stage efficient pressure pointer (9) and the second-stage efficient pressure pointer (10).

4. The indoor mounting type two-stage efficient air filtering device according to claim 1, wherein the primary efficient filtering box body (3) is a cuboid ventilating duct with an air inlet surface and an air outlet surface, and the air inlet surface of the primary efficient filtering box body (3) is in sealing connection with the horizontal air inlet (2); the first-stage efficient air filter (7) is vertically arranged in the first-stage efficient filter box body (3), and the second-stage efficient filter (4) is horizontally arranged.

5. The indoor mounted two-stage efficient air filtering device according to claim 1, wherein a first scanning leakage detecting device (21) is arranged at the downstream of the first stage efficient air filter (7), the first scanning leakage detecting device (21) is connected with a first driving motor (22), and the first driving motor (22) is fixed in the instrument box (6).

6. The indoor mounted two-stage efficient air filtering device according to claim 4, wherein a filter replacement inlet and outlet is formed in the front face of the device main body (1), and a first sealing door (23) is arranged outside the filter replacement inlet and outlet.

7. The indoor mounted two-stage efficient air filtering device according to claim 4, characterized in that a second upstream aerosol sampling port (24) and a disinfectant injection port (25) are fixedly mounted on the front surface of the device main body (1) on the upstream air inlet side of the second stage efficient air filter (4);

on the downstream air outlet side of the second-stage high-efficiency air filter (4), a second downstream aerosol sampling port (26), a sterilization indicator discharge port (27), a sterilization indicator placing port (28) and a second electrical interface (29) are fixedly arranged on the front surface of the device main body (1).

8. The indoor mounted two-stage efficient air filtering device according to claim 4, wherein a second scanning leakage detection device (30) is arranged at the downstream of the second-stage efficient air filter (4), the second scanning leakage detection device (30) is connected with a second driving motor (31), and the second driving motor (31) is fixed on the outer side of the front face of the device main body (1).

9. The indoor mounted double-stage efficient air filtering device according to claim 1, wherein a valve sealing box (32) is arranged outside the sealing valve (5); the valve airtight box (32) is internally provided with an airtight valve and a pipeline which are in airtight connection through a flange.

10. The indoor mounted dual stage high efficiency air filtration device of claim 9, wherein a second sealing door (36) is secured to the front face of the valve enclosure (32).