Automatic pressure difference adjusting device for clean room

The utility model discloses an automatic pressure difference adjusting device for a clean room, and relates to the technical field of clean rooms. The automatic pressure difference adjusting device for the clean room comprises the clean room, the top of the clean room is in flange connection with an air inlet pipe, the air inlet pipe is communicated with the interior of the clean room, the free end of the air inlet pipe is communicated with the outside, the outer wall of one side of the clean room is in flange connection with an air exhaust pipe, the air exhaust pipe is communicated with the interior of the clean room, and the free end of the air exhaust pipe is communicated with the outside. An outer wall flange on the other side of the clean room is connected with an air return pipe which is communicated with the inside of the clean room and the outside, and an inner wall flange on one side of the clean room is connected with a residual pressure valve. The damping layer cleaning device is simple in structur