Safety device for a humidifier

A safety device for a humidifier comprising a housing, a water tank, a nozzle, a vapor producer and a water feeder, said water tank positioned in the interior of said housing for storage of water, said water tank connected with said vapor producer for producing vapor, said nozzle assembled above said water tank for sending out vapor, said housing having its upper side bored with a water intake connected with said water feeder;

• and,
• characterized by a sphere holder provided between said water tank and said nozzle and a hollow space formed between said water feeder and said water tank, said sphere holder holding a sphere thereon, the volume of said sphere exactly able to be closely clogged in said nozzle, said sphere disengaging from said sphere holder and rolling to clog said nozzle for preventing the water in said water tank from overflowing when said water tank is collapsed, said hollow space provided with a sluice gate for water to pass therethrough, a stop plate having a size matching with said sluice gate assembled at the outer end of said hollow space for sealing up said sluice gate, said stop plate controlled to permit water to pass through said sluice gate only in one way, said stop plate actuated to seal up said sluice gate for preventing the water in said water tank from flowing reversely.