Patent ID: 7090709

Claim:
A safety cabinet having a working space formed therein, the working space having a front opening comprising: a peripheral structure defining the front opening of the working space, the peripheral structure having an upper side, a lower side and opposite lateral sides, a front shutter, wherein an inner surface of the front shutter is provided adjacent the front opening, a filter capable of filtering contaminated air, a negative pressure passage formed outside of the working space, for guiding air flowing thereinto, under a negative pressure toward the filter, suction ports connected to the negative pressure passage and formed in the peripheral structure portion surrounding the working space at the upper side and/or the opposite lateral sides of the peripheral structure defining the front opening of the working space so as to be opposed to the inner surface of the front shutter, for sucking air between the inner surface of the front shutter and the peripheral structure, wherein air inside and outside of the working space, which is sucked through the air suction ports is led into the negative pressure passage and toward the filter for purifying the air.