CN212370788U - High-grade biosafety laboratory exhaust system with biosafety cabinet - Google Patents
High-grade biosafety laboratory exhaust system with biosafety cabinet Download PDFInfo
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- CN212370788U CN212370788U CN202021364370.0U CN202021364370U CN212370788U CN 212370788 U CN212370788 U CN 212370788U CN 202021364370 U CN202021364370 U CN 202021364370U CN 212370788 U CN212370788 U CN 212370788U
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Abstract
The utility model provides a high-grade biosafety laboratory exhaust system with biosafety cabinet, it is when opening and closing the biosafety cabinet, has guaranteed that the pressure differential does not appear between biosafety laboratory core space and rather than adjacent preparation reverses or the malleation does not appear in core space. It is including connecting inside supply-air outlet, the first and compensation wind gap of high-grade biological safety laboratory, the first air outlet is connected with the exhaust fan through variable air volume valve one, the biological safety cabinet of high-grade biological safety laboratory internally mounted, the air outlet two-pass of biological safety cabinet decide air volume valve one and special fan is connected, the supply-air outlet passes through decide air volume valve two and is connected with air supply equipment, the air outlet two-pass proportional control valve one with decide air volume valve one is connected, the compensation wind gap pass through proportional control valve two with decide air volume valve one is connected.
Description
Technical Field
The utility model relates to an exhaust system technical field specifically is a high-grade biosafety laboratory exhaust system with biosafety cabinet.
Background
The biological safety cabinet belongs to a primary barrier, and is a box-type air purification negative pressure safety device capable of preventing aerosol from dissipating due to dangerous or unknown biological particles in the experimental operation treatment process, and the negative pressure environment in the biological safety cabinet is generally formed by an exhaust fan. To further prevent the escape of contaminants, biosafety cabinets are typically installed in negative pressure biosafety laboratories. The B2 type biosafety cabinet belongs to a 100% external discharge type, and the principle is that air is taken from a laboratory and then the laboratory is discharged, the pressure in the biosafety laboratory is greatly fluctuated in the opening and closing process, and the pressure difference gradient of the room is difficult to control.
An existing exhaust system with a biosafety cabinet is shown in fig. 1, and comprises a biosafety laboratory 1 and a biosafety cabinet 2 located inside the biosafety laboratory 1, because the local resistance of the biosafety cabinet is very large, two variable frequency exhaust fans (one used and one spare) are arranged on a main pipeline, when the biosafety cabinet 2 is not operated, low power (1100 Pa) is adopted, when the biosafety cabinet 2 is used, high power (1600 Pa) is adopted, when the biosafety cabinet 2 is used, because of large power, noise generated by the exhaust fans is large, and when the biosafety cabinet is opened and closed, the pressure difference of the biosafety laboratory 1 is greatly changed, and biosafety risks exist.
In another structure, as shown in fig. 2, two identical low-power (1100 Pa) exhaust fans are arranged on the main pipeline for exhausting air from the biosafety cabinet 2 and the safety laboratory 1, the biosafety cabinet 2 is also connected with the booster fan 103 alone, when the biosafety cabinet does not operate, the low-power exhaust fan is started, when the biosafety cabinet operates, the booster fan 103 is additionally started, compared with the first structure, the noise is reduced, meanwhile, because the exhaust fan is still continuously operated when the booster fan 103 is started, the pressure difference change is small, the biosafety risk is reduced, however, the arrangement of the air supply and exhaust valves and air ports is shown in fig. 3, the air supply port 4 is connected with the first variable air volume valve 100, the air exhaust port of the biosafety laboratory is connected with the second variable air volume valve 101, the air exhaust port of the biosafety cabinet is connected with the first constant air volume valve 102, the operation process is described below by combining numerical values, the air supply volume is adjusted by a first variable air volume valve 100 to maintain the air supply volume to be 1326CMH (cubic meter per hour), and the air exhaust volume is maintained to be 1482CMH by a second variable air volume valve 101; when the biological safety cabinet is operated, the air supply volume is regulated and maintained at 1800CMH through the first variable air volume valve 100, the rated air discharge volume of the biological safety cabinet is regulated and maintained at 1800CMH through the first constant air volume valve 102, the room air discharge volume of the second variable air volume valve 101 is regulated and maintained at 156CMH, and the room negative pressure is ensured.
By adopting the mode, the opening process of the biological safety cabinet has three valve changes: that is, the first variable air rate valve 100 is adjusted from 1326CMH to 1800CMH, the first constant air rate valve 102 is adjusted from 0CMH to 1800CMH, and the second variable air rate valve 101 is adjusted from 1482CMH to 156 CMH. The whole process has complicated valve adjustment and large pressure fluctuation in a laboratory, and the biological safety laboratory is easy to have the risk of pressure difference reversion or positive pressure.
SUMMERY OF THE UTILITY MODEL
When operation biological safety cabinet to current high-grade biosafety laboratory, biological safety laboratory pressure fluctuation is big, appears the pressure differential easily and reverses or the risk problem of malleation, the utility model provides a high-grade biosafety laboratory exhaust system with biological safety cabinet, it is when operation biological safety cabinet, and the pressure fluctuation is little, avoids taking place the pressure differential and reverses or malleation.
The technical scheme is as follows: the utility model provides a high-grade biosafety laboratory exhaust system with biosafety cabinet, its is including connecting inside supply-air outlet, the air exit of high-grade biosafety laboratory, the air exit is connected with the exhaust fan through becoming air volume valve one, the biosafety cabinet is installed to high-grade biosafety laboratory internally, and biosafety cabinet's air exit is two-way to be connected its characterized in that with special fan through deciding air volume valve one: the air supply outlet is connected with air supply equipment through a second constant air volume valve, and the second air outlet is connected with the first constant air volume valve through a first proportional regulating valve; the air inlet is connected with the constant air volume valve I through a proportion adjusting valve II.
It is further characterized in that:
the air supply outlet is connected with the fixed air volume valve II through an electric valve I, and the air exhaust outlet I is connected with the variable air volume valve I through an electric valve II;
the special fan comprises a main special fan and a standby special fan which are arranged in parallel, and the exhaust fan comprises a main exhaust fan and a standby exhaust fan which are arranged in parallel;
the air supply opening is provided with a first filter, a second filter is connected between the first variable air volume valve and the exhaust fan, and a third filter is connected between the first constant air volume valve and the special fan.
The beneficial effect that has adopted such structure does: because the air supply outlet is connected with the second constant air volume valve, the air supply volume of the room is unchanged when the biological safety cabinet is opened and closed, and the condition that the core area of the biological safety laboratory does not have differential pressure reversion or positive pressure does not occur is ensured; and because the exhaust fan and the special fan are adopted as the exhaust equipment, the generated noise is relatively less, and simultaneously, when the biosafety cabinet is opened or closed, the variable air volume valve has small variation range, the pressure difference variation of the high-grade biosafety laboratory is relatively small, the core area of the biosafety laboratory can be ensured not to have pressure difference reversion, and the air outflow of the laboratory is prevented.
Drawings
FIG. 1 is a conventional fan layout;
FIG. 2 is a diagram of another conventional fan arrangement;
FIG. 3 is a diagram of another conventional valve arrangement;
fig. 4 is a valve layout diagram of the present invention;
fig. 5 is an overall layout diagram of the present invention.
Detailed Description
As shown in fig. 4 and 5, the high-level biosafety laboratory exhaust system with biosafety cabinets comprises an air supply outlet 4, an air exhaust outlet one 5 and a compensation air outlet 6 which are connected with the interior of a high-level biosafety laboratory 1, wherein the compensation air outlet 6 has the same air quantity as the biosafety cabinets, and the compensation air outlet 6 is also a high-efficiency air exhaust outlet, and the resistance of the compensation air outlet is equivalent to the local resistance of the biosafety cabinets; the air outlet I5 is connected with an air exhaust fan 8 through a variable air volume valve I7, a biological safety cabinet 2 is arranged inside the high-grade biological safety laboratory 1, an air outlet II 9 of the biological safety cabinet 2 is connected with a special fan 3 through a constant air volume valve I10, an air supply outlet 4 is connected with an air supply device 12 (a combined air conditioning unit) through a constant air volume valve II 11, the air outlet II 9 is connected with the constant air volume valve I10 through a proportion adjusting valve I13, and a compensation air inlet 6 is connected with the constant air volume valve I10 through a proportion adjusting valve II 14.
The working principle is described below by referring to an example, the biosafety cabinet may be a B2 biosafety cabinet (100% external discharge), when the biosafety cabinet 2 is not operated, the first proportional control valve 13 is closed, the second proportional control valve 14 is opened, and the room supply air maintains a certain amount of supply air such as 1800CMH through the second constant air valve 11, on the basis of which, the room exhaust air maintains 1800CMH exhaust air amount through the first constant air valve 10 and maintains 156CMH exhaust air amount through the first variable air valve 7 to maintain the room at negative pressure, wherein the first variable air valve 7 is controlled by the room pressure difference, and the control element of the variable air valve is the room pressure difference to control the room pressure difference, and the control accuracy is relatively improved because the exhaust air amount is small. When the biological safety cabinet 2 is operated, the first proportional control valve 13 is slowly opened, the second proportional control valve 14 is slowly closed, and the biological safety cabinet uses a constant air volume for air exhaust, so that the rated air volume of the branch pipe is guaranteed to be unchanged. The air supply of the whole air supply system is provided with a constant air volume valve, so that the air supply volume of a room is ensured to be constant; in the working condition change process, the adoption of the proportional control valve can realize the constant exhaust air volume in the switching process and reduce the biological safety risk; meanwhile, a mode of combining the special fan 3 and the exhaust fan 8 is adopted, and compared with the first traditional exhaust system, the noise is reduced.
Specifically, the air supply port 4 is connected with the second constant air volume valve 11 through the first electric valve 15, and the air exhaust port 5 is connected with the first variable air volume valve 7 through the second electric valve 16. In the disinfection mode, the combined air conditioning unit stops, the electric valves I15 and II 16 are closed, and the proportional control valves I13 and II 14 are closed.
In order to ensure the safety of the biological laboratory, the special blower 3 comprises a main special blower 31 and a standby special blower 32 which are arranged in parallel, and the exhaust blower 8 comprises a main exhaust blower 81 and a standby exhaust blower 82 which are arranged in parallel.
In order to ensure the cleanliness requirement of the high-grade biosafety laboratory, a first filter 17 is arranged at the air supply outlet 4 to ensure that the exhaust air of the high-grade biosafety laboratory is reliably treated, a second filter 18 (with the in-situ disinfection in-situ detection function) is connected between the first variable air volume valve 7 and the exhaust fan 8, and a third filter 19 (with the in-situ disinfection in-situ detection function) is connected between the first constant air volume valve 10 and the special fan 3.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a high-grade biosafety laboratory exhaust system with biosafety cabinet, its is including connecting inside supply-air outlet, the air exit of biosafety laboratory, the air exit is connected with the exhaust fan through becoming air volume valve one, the biosafety laboratory internally mounted has the biosafety cabinet, and the air exit two-pass of biosafety cabinet is crossed and is decided air volume valve one and be connected its characterized in that with special fan: the air supply outlet is connected with air supply equipment through a second constant air volume valve, and the second air outlet is connected with the first constant air volume valve through a first proportional regulating valve; the air inlet is connected with the constant air volume valve I through a proportion adjusting valve II.
2. The high-grade biosafety laboratory exhaust system with biosafety cabinets according to claim 1, characterized in that: the air supply outlet is connected with the fixed air volume valve II through the electric valve I, and the air exhaust outlet I is connected with the variable air volume valve I through the electric valve II.
3. The high-grade biosafety laboratory exhaust system with biosafety cabinets according to claim 2, characterized in that: the special fan comprises a main special fan and a standby special fan which are arranged in parallel, and the exhaust fan comprises a main exhaust fan and a standby exhaust fan which are arranged in parallel.
4. The high-grade biosafety laboratory exhaust system with biosafety cabinets according to claim 1, characterized in that: the air supply opening is provided with a first filter, a second filter is connected between the first variable air volume valve and the exhaust fan, and a third filter is connected between the first constant air volume valve and the special fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021364370.0U CN212370788U (en) | 2020-07-13 | 2020-07-13 | High-grade biosafety laboratory exhaust system with biosafety cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021364370.0U CN212370788U (en) | 2020-07-13 | 2020-07-13 | High-grade biosafety laboratory exhaust system with biosafety cabinet |
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| Publication Number | Publication Date |
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| CN212370788U true CN212370788U (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021364370.0U Active CN212370788U (en) | 2020-07-13 | 2020-07-13 | High-grade biosafety laboratory exhaust system with biosafety cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847659A (en) * | 2021-08-30 | 2021-12-28 | 南京福加自动化科技有限公司 | Clean room pressure difference gradient control system and control method |
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2020
- 2020-07-13 CN CN202021364370.0U patent/CN212370788U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847659A (en) * | 2021-08-30 | 2021-12-28 | 南京福加自动化科技有限公司 | Clean room pressure difference gradient control system and control method |
| CN113847659B (en) * | 2021-08-30 | 2024-03-19 | 南京福加自动化科技有限公司 | Clean room pressure difference gradient control system and control method |
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