Patent ID: 7465225

Claim:
A clean room unit which is provided with a work room isolated from the exterior and a clean bench unit which has a work opening facing to the work room and is installed independently inside a building: said clean room unit comprising: an air conditioning system which can perform purification and pressure control of air inside the work room and clean bench unit and can generate an air shower in the work room, and an air conditioning control means which controls the air conditioning system and can switch the air conditioning system between an air shower mode to generate an air shower in the work room and a work mode to enable specific work by making the work room positively pressurized or negatively pressurized, wherein the clean bench unit has an open/close shutter which opens/closes the work opening and a shutter open/close detection means which detects whether this open/close shutter is open or closed, and the air conditioning control means prohibits switching to the shower mode when it is detected by the shutter open/close detection means that the open/close shutter is open.