JPS5827823Y2 - Ultrasonic atomizer - Google Patents

Description

[Detailed description of the invention] The present invention relates to an ultrasonic atomization device that atomizes liquid by installing a piezoelectric vibrator at the bottom of the atomization chamber, which reduces pulsation in the amount of atomization and increases the amount of atomization. This is what we are trying to increase.

Fig. 1 shows a conventional ultrasonic atomizer, in which a piezoelectric vibrator 1 is watertightly attached to the bottom of an atomization chamber 5 containing a liquid 4 at a predetermined level using a rubber gasket and a holder 2. ing.

A horn 3 is provided above the piezoelectric vibrator, and this horn 3
is placed below the liquid level, and arranged so that its center coincides with the center of the piezoelectric vibrator 1.

The piezoelectric vibrator 1 is electrically driven at a specific frequency, emits ultrasonic waves into the liquid, and atomizes the liquid 4.

In this case, a fountain-like liquid column is formed in the vertical direction on the surface of the liquid 4, and water droplets such as large liquid particles and fine particle mist are generated at the tip of this liquid column, and the air is emitted from the air outlet 6. The mist is forcibly discharged from a discharge tube 7 attached to the fog chamber 5 by blowing air.

In a structure where a liquid column is formed perpendicular to the liquid surface, water droplets such as liquid particles generated from the tip of the liquid column fall to the tip of the liquid column, resulting in the liquid column being destroyed. The mist that is continuously generated is interrupted each time water droplets such as the liquid particles fall, resulting in intermittent atomization and a decrease in the amount of atomization.

Therefore, the present invention aims to eliminate such intermittent atomization, that is, pulsation in the amount of atomization, and also eliminate the decrease in the amount of atomization.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a through hole is provided in the bottom of the atomization chamber 8, and a piezoelectric vibrator 9 is mounted watertight with a packing and a holder 10 so as to cover the through hole.

Then, a horn 11 whose upper hole diameter is smaller than the lower hole diameter is placed inside the atomization chamber 8 so that its tip is exposed above the liquid level, and the center of the horn 11 is slightly smaller than the center of the piezoelectric vibrator 9 as shown in FIG. d) Attach to the bottom of the atomization chamber so that it is offset.

12 is a liquid. A hole 13 is provided in the horn 11 as shown in FIG. 3 so that the liquid can also enter the inside of the horn 11.

A blower port 14 is provided on the side surface of the atomization chamber 8, and a discharge tube 15 is further formed at the upper part of the atomization chamber 8, facing the horn 11.

With the above structure, the center of the horn 11 and the center of the piezoelectric vibrator 9 are slightly shifted, so that the liquid column 16 is formed with a certain inclination above the liquid level.

In this case, water droplets such as liquid particles are scattered at the tip of the continuously formed liquid column, but these water droplets fall at a position away from the tip of the liquid column.

Therefore, there is no occurrence of destruction of the liquid column due to water droplets such as falling liquid particles, and atomization is performed continuously.

FIG. 4 shows the amount of atomization when the vibration power of the piezoelectric vibrator is kept constant at 30 W and the positional deviation d between the center of the piezoelectric vibrator 9 and the center of the horn 11 is varied.

As is clear from Figure 4, the positional deviation is 0.5 to 3.0 mm.
It was possible to obtain a maximum improvement in atomization ability of about 17% within the range of .

If the positional deviation is 3 mm or more, the ultrasound reflection from the horn will increase, and the atomization ability will decrease.

As described above, according to the present invention, the tip of the horn is exposed above the liquid surface, and the center of the horn is slightly shifted from the center of the piezoelectric vibrator, thereby preventing intermittent atomization. It is possible to improve the atomization ability.

Such an atomizer can be used to atomize and burn kerosene or the like, and in this case, continuous combustion can be ensured.

In addition, it can be used in medical devices such as nebulizers that use medical liquids, and in this case, it has a high industrial value because it can maintain the ejection of fine particles at a constant density and has the advantage of being easy to inhale. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a conventional ultrasonic atomization device, FIG. 2 is a sectional side view of an ultrasonic atomization device according to an embodiment of the present invention, and FIG. 3 is a perspective view of one component of the device. FIG. 4 is a characteristic diagram for explaining the device. 8... Atomization chamber, 9... Piezoelectric vibrator, 1
1... Horn, 14... Ventilation port, 15
...Discharge tube, 12...Liquid, 16...
...Liquid column.

Claims (1)

[Scope of utility model registration request] A piezoelectric vibrator is placed at the bottom of the atomization chamber, a discharge tube is formed above the atomization chamber facing the piezoelectric vibrator, and a ventilation hole is provided to send air into the atomization chamber. An ultrasonic atomizer including a horn smaller than the diameter of the prepared hole and arranged in the atomization chamber so that its tip is exposed above the liquid level in the atomization chamber and the center of the horn is slightly shifted from the center of the piezoelectric vibrator. .