Deodorizing device and closestool

The deodorization device comprises a water seal part and a fan assembly used for extracting odor, the fan assembly is provided with an air inlet and an air outlet, the water seal part is provided with a water seal cavity and an exhaust port used for being communicated with a blow-off pipe or a sewer line of a bathroom sanitary appliance, the exhaust port is communicated with the water seal cavity, and the air outlet is communicated with the water seal cavity. An air outlet of the fan assembly is communicated with the water seal cavity, so that the extracted odor is discharged from the exhaust port after passing through water seal water in the water seal cavity; the water seal water replacement structure is used for supplementing and replacing water seal water in the water seal cavity; and the water seal water replacement structure is provided with a water replenishing port and a water outlet which are communicated with the water seal cavity. The water seal water replacement structure is adopted, water seal wa