Steam generator with water shortage protective device

The present invention discloses a steam generator with a water shortage protective device. The steam generator comprises a diffuser and a body housing. The diffuser is mounted on the top of the body housing. A water storage tank is disposed at the inner upper part of the body housing while a voltage regulator, a controller and a heating water tank are disposed at the bottom. The water storage tankcommunicates with the heating water tank through the water shortage protective device. An electrical heating rod is disposed within the heating water tank. An air outlet is provided in the top of theheating water tank and a nozzle is mounted on the air outlet. An air blower is disposed at the bottom of the diffuser and a nozzle passing hole is provided in the bottom of the diffuser. An upper endof the nozzle extends into the diffuser via the nozzle passing hole. The electrical heating rod is electrically connected to the voltage regulator. The air blower and the voltage regulator are both electrically connected to th