Water tank water seal device

The utility model relates to a water seal device of a water tank. When no water seal exists in the desalted water tank or the water seal effect is poor, a large amount of air enters the desalted watertank, so that the pH of desalted water is reduced, and the desalted water enters a thermodynamic system and corrodes the system. The device comprises a water tank, an L-shaped water seal device, a carbon dioxide absorber, a first valve, a second valve, a water injection pipe, a water outlet pipe, a drain pipe, an exhaust pipe and an air inlet pipe, the L-shaped water seal device is communicated with the water tank and connected to the lower portion of the water tank, and a first valve is arranged between the water tank and the L-shaped water seal device. One end of the exhaust pipe is communicated with the water tank, the other end of the exhaust pipe is located in the L-shaped water seal device, the air inlet pipe is communicated with the exhaust pipe, and a carbon dioxide absorber and asecond valve are arranged