Impact type air sampler

Abstract

The invention discloses an impact type air sampler which comprises a sampling body and a limiting mechanism, an exhaust pipe works, so that external air enters an inner cavity of the sampling body from an air inlet pipe, the air entering from the air inlet pipe impacts sampling liquid, and when the sampling liquid splashes upwards, part of the splashed sampling liquid is blocked by a limiting element, so that the sampling liquid is prevented from splashing. The sampling liquid flows back into the inner cavity of the sampling body, part of the splashed sampling liquid falls to the top of the limiting element, the limiting element is obliquely arranged towards the bottom of the sampling body, and the sampling liquid still flows back into the inner cavity of the sampling body under the flow guide action of the limiting element, so that the loss of the sampling liquid is effectively reduced, and the long-time sampling requirement is met; meanwhile, the loss of an air sample is reduced. Meanwhile, the impact type air sampler can meet the sampling requirement under the condition that the air flow speed is large, the air microorganism sampling rate can be increased, and the accuracy of the sampling result is improved.

Description

technical field [0001] The invention relates to the technical field of air sampling detection equipment and its surrounding supporting facilities, in particular to an impact air sampler. Background technique [0002] Humans, animals and plants, as well as microorganisms in the soil can be dispersed in the air through droplets or dust, so that the air contains certain types and quantities of microorganisms. In theory, there is generally no pathogenic microorganism in the air, but in the air near hospitals, veterinary hospitals and livestock and poultry stables, aerosols of pathogenic microorganisms are often suspended, and healthy people or animals are often infected by inhalation. Air polluted by pathogenic microorganisms can often become the source or medium of pollution, causing the epidemic of infectious diseases. Therefore, the detection of air microorganisms is of great significance for the prevention and control of infectious diseases and the supervision and protectio...

AI Technical Summary

Problems solved by technology

[0004] The commonly used impact air sampler has a large limit on the air flow rate when used. When the air flow rate is high, the sample liquid in the sampler is easy to splash upward under the impact of the high-speed air flow, and is drawn out through the suction port, resulting in sampling The loss of liquid and air samples is not conducive to long-term sampling of air microorganisms

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