Buoyancy-driven power generation device and its power generation method therfor

A buoyancy-driven power generation device, comprising an air pump, a water tank, a transmission gear set, and a generator set, wherein

• a hollow rotating shaft is horizontally mounted in the water tank, one end of the hollow rotating shaft is open, and the open end is connected to an air output end of the air pump;
• the other end of the hollow rotating shaft is connected to a gear shaft of a first end gear in the transmission gear set;
• a gear shaft of a second end gear in the transmission gear set is connected to a rotating shaft of the generator set;
• a plurality of symmetrical pairs of hollow rods are mounted in a direction perpendicular to the hollow rotating shaft, and at least one air storage chamber is mounted at an end of the hollow rods;
• the connection between the hollow rods and the air storage chamber is an intake port of the air storage chamber, and the air output from the air pump enters the air storage chamber along the hollow rotating shaft and the hollow rods via the intake port;
• the air storage chamber is further provided with a vent port and a vent control valve that controls the opening and closing of the vent port.