Microbiological aerosol concentration sampler and concentration sampling method

Abstract

The invention relates to a microbiological aerosol concentration sampler and a concentration sampling method. The microbiological aerosol concentration sampler is characterized by comprising a concentrator having a virtual impact structure, the concentrator is connected with a total flow air channel, a main flow air channel and a small flow air channel, the main flow air channel is provided with a main flow sensor and a main flow sampling pump sequentially, an output end of the small flow air channel is connected with a liquid impact type microbiological sampler which is connected with a drying bottle through an air channel, the drying bottle is connected with the small flow sampling pump through an air channel, a small flow sensor and a small flow regulating valve are arranged on the air channel between the drying bottle and the small flow sampling pump sequentially, the main flow sensor and the small flow sensor are connected with a digital signal processor electrically, and the digital signal processor is electrically connected with a man-machine interface and the main flow sampling pump. The microbiological aerosol concentration sampler is high in sampling efficiency and capable of preventing damage to microbial activity by long-time sampling, avoiding pollution regeneration and improving detection rate of low-concentration microbiological aerosol and can be widely used for sampling of the indoor and outdoor microbiological aerosol.

Description

technical field [0001] The invention relates to a sampler and a sampling method, in particular to a microbial aerosol concentration sampler and a concentration sampling method. Background technique [0002] Aerosol particles are a variety of solid particles and liquid tiny particles suspended in the atmosphere, some of which come from nature, such as smoke from volcanic eruptions, soil particles blown by the wind, and salt particles that are evaporated after seawater splashes into the atmosphere , microorganisms, plant spore pollen, fine particles and cosmic dust produced by meteor combustion, etc.; smoke particles etc. When the concentration of aerosol is high enough, it will pose a threat to human health, especially for asthmatics and other people with respiratory diseases. Aerosols containing biological particles in the air (ie, microbial aerosols) can also spread pathogenic microorganisms, which can lead to the prevalence and outbreak of some diseases, especially infec...

AI Technical Summary

Problems solved by technology

However, the collection efficiency of the above sampling method is low. When the concentration of microorganisms in the atmosphere is low but can cause crowd infection, the possibility of being detected is very small.

And when the gas production rate increases, the sampling time will increase, and the activity of microbial particles will decrease; at the same time, the rebound of microbial particles will easily form secondary pollution, etc.

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