Patent ID: 7335244

Claim:
An air-purifying device for a front-opening unified pod comprising: a first compartment having a suction nozzle and a fan-driving means that includes a fan and its drive unit; a second compartment coupled to the first compartment, the second compartment having a discharge nozzle and a dust-filtering means that includes a cleaning filter for removing dust; and a third compartment having an upper portion, a lower portion and a chemical-filtering means for removing moisture and chemical gases between the upper portion and the lower portion, the upper portion having an intake hole coupled to the first compartment and the lower portion having a supply hole coupled to the second compartment so that air passes from the first compartment through the intake hole into the third compartment and passes through the supply hole into the second compartment wherein the suction nozzle and the discharge nozzle are capable of connection to breathing holes of the front-opening unified pod, wherein the air is purified and its purity is maintained by being circulated between the front-opening unified pod and the air-purifying device by activating the air-purifying device, wherein the air in the front-opening unified pod is sucked via one of the breathing holes and enters the air-purifying device through the suction nozzle, wherein the air-purifying device removes the moisture, chemical gases, and dust from the air, and wherein then the purified air, from which the moisture, chemical gases, and dust have been removed, is again blown into the front-opening unified pod via the discharge nozzle and another one of the breathing holes.