Hub cooling device

The utility model relates to a hub cooling device, which belongs to the technical field of automobile accessories and comprises a water tank, and the water tank is respectively communicated with an air source and a nozzle corresponding to a hub through an air inlet pipe and a water outlet pipe. The air inlet pipe is provided with an operation switch for controlling the on-off of the air inlet pipe; the water outlet pipe is provided with a pneumatic control valve communicated with an air source through a first air inlet branch. The operation switch is turned on, gas in the gas source enters the water tank, the water source is pushed to pass through the pneumatic control valve on the water outlet pipe under the action of pressure, and the water source is sprayed out through the spray head after overcoming spring resistance in the pneumatic control valve; the device completely utilizes air pressure to control on-off of a water source, and the situation that a traditional electric control structure is short-circu