Rotary negative pressure balance air interchanger

The utility model discloses a rotary type negative pressure balance air interchanger which comprises a frame and a rotating body, the frame is used for being connected with a spacer, and the spacer is used for separating the inside of a room from the outside of the room; the frame comprises a first fixing plate opposite to the outdoor space and a second fixing plate opposite to the indoor space, a first through hole is formed in the first fixing plate, and a second through hole is formed in the second fixing plate; the rotating body comprises a first movable plate, a second movable plate and a composite filter screen located between the first movable plate and the second movable plate. The rotary type negative pressure balance air interchanger can be installed on a spacing body which is arranged in a kitchen and is spaced from the outside, when a smoke exhaust ventilator is used, indoor air and outdoor air can be communicated by starting the air interchanger, and a series of problems such as ceiling deformati