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Negative pressure method of a class III biosafety cabinet operating fully under the condition of negative pressure

A biosafety cabinet, fully operational technology, applied in the negative pressure field of the biosafety cabinet, can solve the problems of deadly pathogens not having the ability to isolate and escape of pathogen aerosols, etc.

Inactive Publication Date: 2009-09-16
上海瑞仰净化装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even in B2 biosafety cabinets without recirculating airflow, due to the opening of the operating window, any gap in the airflow through the front window will lead to the escape of pathogen aerosols
Therefore, biological safety cabinets of this biological isolation level do not have complete isolation capabilities for the operation of deadly pathogens

Method used

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  • Negative pressure method of a class III biosafety cabinet operating fully under the condition of negative pressure
  • Negative pressure method of a class III biosafety cabinet operating fully under the condition of negative pressure
  • Negative pressure method of a class III biosafety cabinet operating fully under the condition of negative pressure

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0017] The present invention is realized through the following steps:

[0018] 1. At the inlet, make the downstream of the primary air pre-filter form a pressure difference with the outside air, the pressure difference is between -5 and -10 Pa;

[0019] 2. The pressure difference between the airflow and the outside air after passing through the medium-efficiency air pre-filter is -80Pa~-100Pa;

[0020] 3. The air pressure inside the biological operation experiment chamber and the return air grille and pipeline is maintained at least -200Pa pressure difference;

[0021] 4. The air pressure difference through the first-stage efflux super high efficiency air filter reaches -280Pa~-300Pa;

[0022] 5. The air pressure difference through the second-stage efflux super high efficiency air filter reaches -360Pa~-400Pa;

[0023] Among them, in step "1": the spe...

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Abstract

The invention relates to a negative pressure method of a class III biosafety cabinet operating fully under the condition of negative pressure. The method is realized through the following steps: the downstream part of a primarily efficient air pre-filter is caused to form differential pressure that is between minus 5-minus 10 Pa with external air at an air inlet; after penetrating through an intermediately efficient air pre-filter, air stream forms the differential pressure between minus 80-minus 100 Pa with the external air; the differential pressure of the air pressures in a biological operation experiment chamber, a return air grille and a pipeline is at least kept at minus 200 Pa; the differential pressure of the air stream penetrating through a first stage efflux superhigh efficiency air filter reaches minus 280-minus 300 Pa; and the differential pressure of the air stream penetrating through a second stage efflux superhigh efficiency air filter reaches minus 360-minus 400 Pa. The negative pressure method has the beneficial effects that when a deadly pathogen medium is operated, pathogen aerosol is absolutely isolated and does not cause the risk that people are affected with the deadly pathogen; and even if the cabinet body has a tiny cavity similar to a needle point, the negative pressure technology can also ensure the absolute isolation of the pathogen.

Description

Technical field [0001] The invention relates to a biological safety cabinet, in particular to a negative pressure method for the biological safety cabinet. Background technique [0002] The biological safety cabinet is an airflow enclosure. The inlet airflow is filtered by high-efficiency air and used to protect the experimental samples in the operation area; the inflow airflow from the operation window forms an isolation air curtain to and outside the operation area to protect personnel from the threat of pathogen infection; The external airflow is discharged into the atmosphere or the laboratory through high-efficiency air filtration to prevent pathogen aerosol infection. [0003] The vertical airflow used by the secondary biological safety cabinet to protect the experimental samples in the operating area is achieved by matching the fan and the high-efficiency air filter, so that the static pressure box generates positive air pressure and passes through the high-efficiency air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L1/00B01D46/00
Inventor 周维华
Owner 上海瑞仰净化装备有限公司
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