Control system of pollution-free biosafety cabinet

Abstract

The invention relates to a control system of a pollution-free biosafety cabinet, and belongs to the technical field of experimental equipment. The biosafety cabinet is sequentially provided with a primary filter, a fan, a first ultraviolet lamp, a first photocatalyst layer, a second ultraviolet lamp, a second photocatalyst layer and a main filter at an air inlet of a decontamination chamber, and the control system comprises a first threshold comparator, a second threshold comparator, a processor, a warner and a display; the first threshold comparator is used for comparing a signal output by a first differential pressure sensor and a first threshold, when the output signal is greater than the first threshold, the warner alarms, and the display shows letters indicating invalidation of the filter; and the second threshold comparator is used for comparing the signal output by the first differential pressure switch with a second threshold, when the output signal is less than the second threshold, the warner alarms, and the display shows letters indicating damage of the filter. The control system provided by the invention is capable of conveniently judging the condition of the filter.

Description

technical field [0001] The invention relates to a control system of a pollution-free biological safety cabinet, which belongs to the technical field of experimental equipment. Background technique [0002] figure 1 It is a schematic side view of a biological safety cabinet in the prior art. Such as figure 1 As shown in FIG. 1 , the biological safety cabinet includes a housing 1 arranged on a support 30 , and casters 31 are provided at the lower ends of the four legs of the support 30 . Housing 1 comprises front cover plate 25, front cover plate 26, left wall, right wall, top wall and bottom wall, is provided with a diffuser plate 27 in the middle part of housing 1, front cover plate 26, the upper half of left wall 1. The upper part of the right wall, the top wall and the diffuser plate form an upper space, the front sealing plate 25, the lower half of the left wall, the lower half of the right wall and the bottom wall form a lower space, and the upper space is provided wi...

AI Technical Summary

Problems solved by technology

In order to sterilize, a UV (ultraviolet) lamp 32 is installed in the working room, promptly utilizes UV (ultraviolet) lamp to irradiate to kill organic compounds or fungi in the air, but the sterilization is not thorough, and at the same time, ultraviolet radiation also makes the air Oxygen in the air becomes ozone. When the concentration of ozone in the air exceeds the standard, ozone is an invisible killer. It strongly stimulates the human respiratory tract, causing sore throat, chest tightness and coughing, causing bronchitis and emphysema; causing human neurotoxicity, Dizziness, headache, vision loss, memory loss; damage to the vitamin E in human skin, causing skin wrinkling and dark spots; it can also damage the immune function of the human body, induce lymphocyte chromosomal changes, accelerate aging, and cause Pregnant women give birth to deformed children, so the ozone discharged from the biological safety cabinet will cause secondary pollution to the air

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