Humidifier with Automatic Humidification Control

Abstract

A humidifier with automatic humidification control using a humidity sensor to detect surrounding humidity and a central processing unit to control on/off of an electric fan and a nebulizer (for example, ultrasonic oscillator) of a humidification unit, enabling the electric fan and the nebulizer to automatically perform a humidification action when the humidity detected by the humidity sensor is below a predetermined low level or to stop the humidification operation when the humidity detected by the humidity sensor surpasses a predetermined high level. As the electric fan and the nebulizer do not keep working continuously, the invention can save energy consumption and reduce component wear and prolong the lifespan of the humidifier.

What is claimed is: 
     
         1 . A humidifier, comprising:
 a housing comprising at least one air input port and at least one spray port;   a humidification unit comprising a water tank mounted in said housing and a nebulizer mounted in said water tank for turning water in said water tank into an ultra fine water mist;   at least one electric fan mounted in said holder base of said housing between said at least one air input port and said at least one spray port for sucking indoor air through said at least one air input port and said humidification unit to let the generated ultra fine water mist be sprayed out of said at least one spray port into the external air; and   a control circuit board comprising a central processing unit electrically coupled with said nebulizer of said humidification unit and said at least one electric fan and a humidity sensor electrically connected to said central processing unit for detecting surrounding humidity and providing detected humidity data to said central processing unit, said central processing unit being adapted to turn on said nebulizer of said humidification unit and said at least one electric fan when the humidity value detected by said humidity sensor is below a predetermined low level, or to turn off said nebulizer of said humidification unit and said at least one electric fan when the humidity value detected by said humidity sensor surpasses a predetermined high level.   
     
     
         2 . The humidifier as claimed in  claim 1 , wherein said nebulizer of said humidification unit is an ultrasonic oscillator.