A biological safety cabinet ultraviolet lamp linkage controller and its control method

Abstract

The invention discloses a biological safety cabinet ultraviolet lamp linkage controller and a control method thereof; the biological safety cabinet ultraviolet lamp linkage controller comprises at least two magnetically controlled switches, and a control circuit; the at least two magnetically controlled switches are arranged on a cabinet door and a slide rail, and the space between the two magnetically controlled switches is greater than the action distance; the control circuit is connected with the magnetically controlled switches and can be used for linkage control of on and off of an ultraviolet lamp by the magnetically controlled switches, the control circuit comprises a relay connected with an ultraviolet lamp switch, and a singlechip connected with the relay, the input end of the singlechip is connected with the output end of an and-gate circuit, the input end of the and-gate circuit is respectively connected to the at least two magnetically controlled switches, when the at least two magnetically controlled switches arranged on the cabinet door and a door frame are corresponding to the position of permanent magnets in corresponding dry reed tubes, signals are sent to the connected gate circuit, when the gate circuit receives the signals sent by all the magnetically controlled switches, signals are sent to the singlechip, the singlechip controls the relay to turn on, the ultraviolet lamp is turned on; if the gate circuit does not receive any signal sent by any of the magnetically controlled switch, the singlechip controls the relay to turn off, and the ultraviolet lamp is turned off.

Description

technical field [0001] The invention relates to the field of biological safety cabinets, in particular to a biological safety cabinet ultraviolet lamp linkage controller and a control method thereof. Background technique [0002] Biological safety cabinets are used to protect the operator, the laboratory environment and experimental materials from exposure to the above-mentioned operations when operating infectious experimental materials such as primary cultures, bacterial strains, and diagnostic specimens. Designed for the possible generation of infectious aerosols and splashes. [0003] Biological safety cabinets are widely used in medical and health care, disease prevention and control, food hygiene, biopharmaceuticals, environmental monitoring, and various biological laboratories. They are an important basis for ensuring biological safety and environmental safety, and belong to the category of "people's livelihood" measurement. As early as 30 years ago, the testing of b...

AI Technical Summary

Problems solved by technology

[0007] However, the ultraviolet lamps of the existing biological safety cabinets need to be switched on and off manually, and there are few automatic controls based on the actual use of the biological safety cabinet, especially according to the opening and closing of the cabinet door.

[0008] The automatic control method mostly adopts the ultraviolet lamp to open the control, and the contact travel switch control or the single-point magnetic control switch is used to control the opening. In actual operation, the fatigue of the travel switch is often used for a long time, resulting in poor contact, or the position deviation of the magnetic control switch. It is difficult to find the position point and other defects, resulting in the abnormality of controlling the UV lamp to turn on or off, and the UV lamp is turned on when it is not needed, causing harm to the human body

It is difficult to achieve 100% safety for users in terms of performance and safety with a single linkage control UV lamp

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