An adjustable flow sieve percussion type compressed air microbial sampler

Abstract

The invention discloses a flow-adjustable impact type compressed air microorganism sampler with sieve meshes, and is applied to the technical field of microorganism acquisition and quantity monitoring. The flow-adjustable impact type compressed air microorganism sampler comprises a shell, a sampling head and a controllable decompression gas circuit system. The sampling head is arranged on the top of the shell, the controllable decompression gas circuit system is arranged in the shell, an air inlet channel is arranged on the sampling head, a culture dish seat which directly faces the air inlet channel is arranged on the shell and is positioned below the sampling head, an air outlet channel is arranged on the culture dish seat, the controllable decompression gas circuit system comprises a gas circuit, a gas pressure regulating valve and a gas flow meter, the gas pressure regulating valve and the gas flow meter are arranged on the gas circuit, one end of the gas circuit on the shell is connected to a gas source connector, and the other end of the gas circuit is butted to the air inlet channel of the sampling head by a gas dispersing head. Compared with other treatment methods, the flow-adjustable impact type compressed air microorganism sampler has the advantages that the flow-adjustable impact type compressed air microorganism sampler is high in sampling speed and particle capture rate; the actual contents of bacteria in compressed air can be accurately expressed, and accordingly a perfect sampling method is proposed.

Description

technical field [0001] The invention is used in the technical field of microorganism collection and quantity monitoring, and in particular relates to an impact-type compressed air microorganism sampler with an adjustable flow sieve hole. Background technique [0002] With the continuous upgrading of production technology such as pharmaceuticals, clean compressed air is more and more widely used in all walks of life as a process source gas. In addition to pharmaceutical manufacturing, clean compressed air is also widely used in beer brewing, food processing, dairy products, etc. And beverage production, medical equipment manufacturing and other industries. Due to direct contact with raw and auxiliary materials or inner packaging materials, whether the microbial limit of the compressed air source reaches the standard becomes an important factor that directly affects product quality. Among them, Article 25 of the "Good Manufacturing Practice for Pharmaceutical Products" (GMP) ...

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Problems solved by technology

But it also has an obvious disadvantage. It adopts the exposure method of rotating culture dish. Since the angular velocity difference between the circumference of the culture dish and the center of the circle is relatively large, the exposure time of the center of the culture dish will be longer than that of the circumference. The result is Microbial colonies will overlap at the center of the colony counting circle

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