Ammonia water tank with water seal

The utility model relates to the field of ammonia water tanks, in particular to an ammonia water tank with a water seal, which comprises an ammonia water tank body, a gas ammonia absorption cavity arranged on the ammonia water tank body, a float valve arranged in the gas ammonia absorption cavity and used for controlling whether the ammonia water tank body is communicated with the gas ammonia absorption cavity or not, and an ammonia water feeding pipe, an exhaust pipe and an absorption liquid feeding pipe arranged on the ammonia water tank body. The exhaust pipe and the absorption liquid feeding pipe are both communicated with the ammonia gas absorption cavity, the absorption liquid feeding pipe is connected with a floating ball valve, the floating ball valve is located in the ammonia gas absorption cavity and controls the absorption liquid feeding pipe to feed absorption liquid into the ammonia gas absorption cavity or not, and an overflow pipe is arranged on one side of the ammonia gas absorption cavity; ac