Abstract: A vaporizer includes a case covered with a cover, and a vibrator. The case is divided into a liquid room and an air room. The liquid room has a protruding round member formed in the bottom, and the protruding round room has a center hole for receiving the vibrator from under. The vibrator is connected to a logic circuit and a drive circuit, including an alloy member, a conductive disc, a spring pushing against the conductive disc, an insulating sleeve receiving the spring, a metallic base receiving the insulating sleeve and having heat releasing leaves, then the vibrator receives high frequency vibration signals to produce high frequency vibration for dissolving water into water molecules to flow out of an air outlet of the cover by an exhausting fan in the air room. Thus the vaporizer makes vapor.