Negative-pressure inlet type filter membrane aerosol microorganism sampler

Abstract

The invention relates to a negative pressure inlet type filter membrane aerosol microorganism sampler which is composed of an inlet unit located outdoors and an outlet unit located indoors, and a dynamic device enabling outdoor gas to flow indoors is arranged between the inlet unit and the outlet unit. A detachable filter membrane type microorganism collecting device is arranged in the outlet unit, and a hydrophobic coating is arranged in the whole device, so that microorganism breeding in the use process of the device can be effectively avoided. The sampler can efficiently collect microorganisms entering indoors from outdoors, has the advantages of being small in size and easy and convenient to install, can be widely applied to microorganism collection work of various house structures, and timely provides technical support for scientific research work and public health management institutions to prevent and intervene harmful microorganisms.

Description

technical field [0001] The invention relates to the technical field of sampling machinery and equipment, in particular to an aerosol microbial sampler for collecting aerosol microorganisms entering the room from the outside based on the principle of negative pressure and membrane filtration equipment. Background technique [0002] Microbial exposures affect human health in different ways. Direct contact with pathogens can lead to infection, and exposure to different environmental microorganisms can also affect the health of the human immune system. With the increasing energy consumption of rapid urbanization and rapid industrialization, the levels of outdoor and indoor air pollution from industrial and motor vehicle emissions continue to increase, which has also led to a significant increase in the incidence of respiratory diseases such as asthma. Among them, the indoor air environment is closely related to the health of the urban population. Adults in the city spend about ...

AI Technical Summary

Problems solved by technology

Compared with these six types of samplers, the volume of the filter sampler is relatively small, but the existing filter sampler is mainly aimed at the collection of outdoor or indoor air microorganisms, and there are still defects in the collection of air microorganisms entering the room from the outside

[0004] In addition, the filter membrane, a key component of the existing filter sampler, is usually fixed in the device and is not easy to disassemble and replace

The filter membranes currently used are mainly divided into two categories: (1) HEPA filter membrane: it is a relatively efficient filter material, which is made of special fiber layers. Air can pass through, but fine particles cannot pass through, but the filter membrane of this material The resistance is high, the equipment must be equipped with a motor, and the resistance is overcome by voltage, which requires high dynamics of the equipment; (2) Air filter membrane: the adsorption of activated carbon is used to achieve the adsorption of tiny particles in the air, but The filtration particle size of this material is limited, and it is mostly used for the adsorption of atmospheric particles, and the adsorption effect on microorganisms is not obvious

At the same time, the filter membranes of these two materials cannot be hydrophobic, resulting in the risk of self-breeding microorganisms during use, thereby affecting the sampling results

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