Patent ID: 8382873

Claim:
A safety cabinet comprising, an air supply system including a blower and a first air cleaner through which the blower supplies a clean air into a working space, a front surface of the working space including a front shutter, a front opening communicating with the working space to enable an arm of a worker to be inserted into the working space, and a discharge system including a second air cleaner through which air taken through the front opening into the safety cabinet is discharged from the safety cabinet by the blower, wherein in response to bringing down the front shutter to change a size of the front opening from a first size to a second size so that a flow rate of the air supplied from the front opening into the working space is changed from a first flow rate to a second flow rate, the flow rate of the air supplied from the front opening into the working space is decreased by the blower from the second flow rate toward the first flow rate as a predetermined value.