CN218120064U - Positive and negative pressure switching device - Google Patents
Positive and negative pressure switching device Download PDFInfo
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- CN218120064U CN218120064U CN202222562182.4U CN202222562182U CN218120064U CN 218120064 U CN218120064 U CN 218120064U CN 202222562182 U CN202222562182 U CN 202222562182U CN 218120064 U CN218120064 U CN 218120064U
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Abstract
The utility model relates to the technical field of gas flow control, in particular to a positive and negative pressure switching device which can meet the requirement of random positive and negative pressure switching of a nucleic acid sampling pavilion and a workstation and comprises an air inlet module and an air exhaust module, wherein the air supply module comprises an air inlet, an air inlet fan, a first check valve and a first filter; the air exhaust module comprises a negative pressure exhaust fan, a second check valve, an air outlet, a second filter, an electric sealed valve and a bypass pipeline, the electric sealed valve is installed on the bypass pipeline, the second check valve is installed at the air outlet of the negative pressure exhaust fan, the air inlet of the bypass pipeline and the negative pressure exhaust fan is communicated with the second filter, and rain-proof louver air openings are installed at the air inlet and the air outlet.
Description
Technical Field
The utility model relates to a gas flow control technical field specifically is a positive negative pressure auto-change over device.
Background
As is well known, with the development of epidemic situation, the normalized epidemic situation prevention and control becomes the main melody for the epidemic prevention and control work in China. Particularly, at the recent stage, the television conference of joint defense joint control mechanism of the state department clearly proposes a strategic target of creating a '15-minute nucleic acid sampling service circle', and the 'normalized nucleic acid detection' is deeply promoted, so that a nucleic acid sampling kiosk and a workstation become 'just needed' to some extent. With the continuous maturity of the technology, the nucleic acid sampling workstation is developing towards the direction of energy saving, convenient to use, space saving, safe and efficient, one machine is multi-functional etc. characteristics more and more.
A normal nucleic acid sampling pavilion or a work station needs to ensure the positive pressure in a cabin. In order to realize the pressure requirement, the workstation on the market maintains a constant positive pressure value in the cabin through a positive pressure ventilation system and the seepage of air volume by the gap between the door and the window.
The existing nucleic acid sampling pavilion and workstation have single functions, and can only realize the protection of internal personnel during sampling through positive pressure solution. In order to ensure the pressure difference value and the ventilation frequency in the cabin, the fresh air volume of the positive pressure ventilation system is increased, and the positive pressure value in the cabin is increased continuously due to the limited permeability of the gap between the door and the window, so that the worker can feel uncomfortable when working in the environment for a long time.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
To the not enough of prior art, the utility model provides a positive negative pressure auto-change over device can satisfy the requirement that nucleic acid sampling pavilion, workstation positive negative pressure switch over at will.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the negative pressure switching device comprises an air inlet module and an air exhaust module, and the air supply module comprises an air inlet, an air inlet fan, a first check valve and a first filter; the exhaust module comprises a negative pressure exhaust fan, a second check valve, an exhaust outlet, a second filter, an electric sealed valve and a bypass pipeline.
Further, an electric sealing valve is installed on the bypass pipeline.
Further, a second check valve is installed at an air outlet of the negative pressure exhaust fan.
Furthermore, the air inlets of the bypass pipeline and the negative pressure exhaust fan are communicated with the second filter.
Furthermore, rain-proof tripe wind gap is all installed to air intake and air exit.
(III) advantageous effects
Compared with the prior art, the utility model provides a positive negative pressure auto-change over device possesses following beneficial effect:
the positive and negative pressure switching device can meet the requirement of random positive and negative pressure switching of a nucleic acid sampling pavilion and a workstation through the arrangement of the air inlet module and the air exhaust module, and ensures that the positive pressure value in the cabin does not exceed the standard and the energy-saving effect is achieved through the bypass pipeline arranged in the air exhaust module; the bypass pipeline is arranged below the exhaust fan, so that the internal space is fully utilized, and the exhaust fan is convenient to install. Through the setting of first filter and second filter, the entering is all handled through high-efficient filtration with the combustion gas, safe and reliable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. an air inlet; 2. an air intake fan; 3. a first check valve; 4. a first filter; 5. a negative pressure exhaust fan; 6. a second check valve; 7. an air outlet; 8. a second filter; 9. an electrically-operated airtight valve; 10. a bypass conduit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-1, the positive/negative pressure switching device of the present invention includes an air intake module and an air exhaust module, the air supply module includes an air intake 1, an air intake blower 2, a first check valve 3, and a first filter 4; the exhaust module comprises a negative pressure exhaust fan 5, a second check valve 6, an exhaust outlet 7, a second filter 8, an electric closed valve 9 and a bypass pipeline 10.
Wherein the electric closing valve 9 is mounted on the bypass pipe 10.
Wherein, the second check valve 6 is installed at the air outlet of the negative pressure exhaust fan 5.
Wherein, the bypass pipeline 10 and the air inlet of the negative pressure exhaust fan 5 are communicated with the second filter 8.
Wherein, rain-proof tripe wind gap is all installed to air intake 1 and air exit 7.
In summary, when the positive/negative pressure switching device is used, when positive pressure is required in the nucleic acid sampling booth or the workstation, the air inlet fan 2 is started, the electric sealing valve 9 is opened, and the excess air is filtered by the second filter 8 through the bypass pipeline 10 and then discharged to the outside. When nucleic acid sampling pavilion, workstation are indoor when needing the negative pressure, electronic airtight valve 9 is closed, and negative pressure exhaust fan 5 opens, and is discharged indoor air to outdoor, and the combustion gas all just discharges outdoor through second filter 8, has guaranteed outdoor personnel's safety, and the gas that gets into indoor just enters into indoor through first filter 4, has guaranteed indoor personnel's safety.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. Positive and negative pressure auto-change over device, including air inlet module and the module of airing exhaust, its characterized in that: the air inlet module comprises an air inlet (1), an air inlet fan (2), a first check valve (3) and a first filter (4); the exhaust module comprises a negative pressure exhaust fan (5), a second check valve (6), an exhaust outlet (7), a second filter (8), an electric airtight valve (9) and a bypass pipeline (10).
2. The positive-negative voltage switching device according to claim 1, wherein: the electric sealed valve (9) is arranged on the bypass pipeline (10).
3. The positive-negative voltage switching device according to claim 1, wherein: the second check valve (6) is arranged at the air outlet of the negative pressure exhaust fan (5).
4. The positive-negative pressure switching device according to claim 1, characterized in that: and the air inlets of the bypass pipeline (10) and the negative pressure exhaust fan (5) are communicated with the second filter (8).
5. The positive-negative voltage switching device according to claim 1, wherein: rain-proof shutter air openings are respectively arranged on the air inlet (1) and the air outlet (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222562182.4U CN218120064U (en) | 2022-09-27 | 2022-09-27 | Positive and negative pressure switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222562182.4U CN218120064U (en) | 2022-09-27 | 2022-09-27 | Positive and negative pressure switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218120064U true CN218120064U (en) | 2022-12-23 |
Family
ID=84495057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222562182.4U Active CN218120064U (en) | 2022-09-27 | 2022-09-27 | Positive and negative pressure switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218120064U (en) |
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2022
- 2022-09-27 CN CN202222562182.4U patent/CN218120064U/en active Active
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