Clean bench capable of monitoring cleanliness in real time

Abstract

The invention provides a clean bench capable of monitoring the cleanliness in real time. The clean bench comprises a box body and a detection structure, wherein the box body is in a structure provided with an opening in one side; a working region is formed in the box body; the detection structure is arranged in the box body and is located at the upper part of a working region and comprises a scanning probe and a detection circuit arranged in the scanning probe; the detection circuit comprises an infrared light-emitting diode IRED and a phototransistor PD; the optical axes of the phototransistor PD and the infrared light-emitting diode IRED are crossed; and the phototransistor PD is connected with a power amplification circuit. According to the clean bench, equipment capable of randomly moving and monitoring the cleanliness in real time is arranged on a flow equalizing plate, so that the cleanliness testing equipment can be used for randomly monitoring the cleanliness of the rear end of a filter on a flow equalizing plate in actual utilization of a bench, and the monitoring of the cleanliness of a clean working region is realized; and when the cleanliness exceeds a normal value, a signal is output in real time, so that an audible and visual alarm signal can be sent by the equipment in time to promote an operator to check and maintain in time.

Description

technical field [0001] The invention mainly relates to the field of biological safety purification, in particular to a clean workbench for real-time monitoring of cleanliness. Background technique [0002] Clean benches are widely used in medical, pharmaceutical, food, electronics, instrumentation, and bioengineering industries. The purpose is to provide a local sterile and dust-free space to prevent external microbial contamination. The clean workbench is powered by a motor, and the air is blown out through a high-efficiency filter to form a continuous laminar flow of dust-free and sterile ultra-clean air, the so-called "high-efficiency clean air", which removes more than 0.3 μm or even 0.12μm dust, fungi and bacterial spores, etc. The flow rate of the ultra-clean air is enough to prevent the pollution caused by the possible disturbance of the nearby air. The staff operates under such sterile conditions to keep the sterile materials free from contamination during the trans...

AI Technical Summary

Problems solved by technology

Traditional clean benches can only be inspected during the initial installation, and the integrity of the filter cannot be guaranteed during subsequent use

If leakage occurs, it will not be able to provide a safe and clean environment for the sample, and there will be safety risks in continued use, and the clean area of ​​the working area may be polluted by the outside air so that it loses the role of a clean bench

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