Liquid bath air draft device

The utility model belongs to the technical field of processing equipment, and discloses a liquid tank air draft device which comprises a compartment, a fan and a spraying assembly, an air draft partition cavity is formed in the compartment and provided with an air inlet and an air outlet, the air inlet is communicated with a liquid tank, the air outlet is connected to the outside, and the fan guides airflow to flow from the air inlet to the air outlet; specifically, the fan comprises an air draft fan and an air exhaust fan, the air draft fan is installed at the air inlet and used for sucking gas in the liquid tank into the air draft partition cavity so as to prevent the gas generated by volatilization of the alkaline liquid medicine from harming workers, and the air exhaust fan is installed at the air outlet and used for exhausting the gas in the air draft partition cavity for next purification treatment. The spraying assembly is arranged in the air draft partition cavity and used for flushing the fan and the