Ultrasonic wave nebulizer

Details Ultrasonic wave nebulizer Ultrasonic wave nebulizer

1992-12-08

1994-05-17

Yu, Mickey

Amusement devices: toys

Smoking

Wheeled vehicle

2391022, A63H 1914, A63H 1726, B05B 108

Patent

active

053122810

ABSTRACT:
An ultrasonic wave nebulizer for converting water or liquid to mist has a disc-shaped piezoelectric vibrator (TD) which has a pair of surfaces one of which is defined as an operation surface. A thin plate (21) having a plurality of small holes or mesh is located close to the operation surface so that a gap or a thin water or liquid film is defined between the mesh and the operation surface. The gap spacing is smaller than the diameter of a water drop which is composed by surface tension of water where no mesh is located. Upon excitation of the vibrator with high frequency power, the water film is converted to mist. The exciting frequency is almost the same as the resonant frequency of the vibrator. The high frequency power is intermittent having duty ratio (D.sub.ON /D) in the range from 10% to 70% so that instantaneous exciting power is high to facilitate water to mist conversion while average power is low to keep temperature at the operation surface low. The present nebulizer has many applications, including medical inhaler, a toy which generates pseudo smoke, etc. (FIG. 3)

REFERENCES:
patent: 3160980 (1964-12-01), Seuthe
patent: 4044297 (1977-08-01), Nobue et al.
patent: 4119096 (1978-10-01), Drews
patent: 4319155 (1982-03-01), Nakai et al.
patent: 4702418 (1987-10-01), Carter et al.
patent: 5152456 (1992-10-01), Ross et al.

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