The utility model discloses a humidifying tank, and belongs to the field of medical auxiliary instruments. The humidifying tank mainly solves the problems that a
buoy of an existing humidifying tank is prone to being clamped in an
unstable environment, sealing is poor, and leakage occurs. The humidifying tank comprises a tank body and a bottom plate, the tank body and the bottom plate are sealed and assembled through a sealing ring, the tank body is provided with an air inlet, an air outlet and a liquid inlet, a small
buoy, a large
buoy and a floating sealing
assembly are arranged in the tank body, and the small buoy and the large buoy are hinged to a hinge seat close to one side of the liquid inlet. By means of the lever principle, the small buoy floats upwards to drive the floating sealing
assembly to block the liquid inlet when normal, the large buoy plays a role when the small buoy breaks down, the liquid inlet amount is accurately controlled, and the stability and reliability of equipment are improved. The special structure of the floating seal
assembly achieves double blocking, and the sealing effect is enhanced. The humidifying effect is optimized through the flow guide wall below the air inlet and outlet and the flow guide part on the large buoy. The hinge seat limiting part is convenient to install and prolongs the service life of components. The humidifying tank can stably operate in various environments, and reliable wet gas is provided for a patient.