Hand dryer

The utility model discloses a hand dryer which comprises a drying mechanism and a dustproof mechanism. The drying mechanism comprises a machine body, an air heater is installed at the bottom of the machine body, a flow guide cavity is formed in the top of the air heater and located in the machine body, a hand drying bin is formed in the top of the machine body, an air outlet is formed between the flow guide cavity and the hand drying bin, and telescopic grooves are formed in the two sides of the top of the hand drying bin; the dustproof mechanism comprises a motor and a dustproof plate, the dustproof plate is slidably connected into the telescopic groove, a rack is arranged on one side of the top of the dustproof plate, and a gear assembly is connected to the output end of the motor and engaged with the rack. According to the hand dryer, by arranging the dustproof plate, when the hand dryer is not used frequently, the top of the hand drying bin can be closed, dust cannot fall into the hand dryer, and the prob