Safety cabinets and safety systems

Abstract

The objective of this invention is to provide a safety cabinet that achieves both safety and reduced operating costs. The safety cabinet of this invention comprises: an air supply fan that supplies airflow into the working chamber via an exhaust HEPA filter; and an exhaust path that discharges exhaust air from the working chamber to the outside via an exhaust HEPA filter; and an airflow variable mechanism in the exhaust path; the airflow variable mechanism is operated such that, after a predetermined time has elapsed since the end of the operator's work, the capacity of the air supply fan is reduced, and the airflow discharged from the exhaust path is decreased.

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