JPS6021780B2 - atomization device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic atomizer that atomizes liquid using high-speed airflow, and aims to improve its atomization performance, reduce its size and weight, extend its lifespan, and reduce noise.

Conventional pneumatic atomizers that atomize liquid using high-speed airflow have the advantage of being able to obtain extremely fine atomized particles, but they require extremely high air pressure, making them difficult to apply to household equipment. , air compressor cost and lifespan,
This was inconvenient in terms of noise. In addition, an atomization device that uses ultrasonic vibration to supply liquid to the vibrating surface and atomize it,
Although it can be miniaturized and has been successfully applied to household equipment, it has the disadvantage that the average particle size of the atomized particles is large due to the generation of large particles due to cavitation. The present invention eliminates the drawbacks of the above-mentioned conventional methods by causing the airflow type atomization device itself to vibrate ultrasonically.

Hereinafter, one embodiment of the present invention will be described based on FIG. 1.

Reference numeral 1 denotes an airflow type atomizer provided at the tip of the vibration magnifying horn 2, which has an injection hole 3 formed at the tip, and an air passage 4 bored in the vibration magnifying horn 2 on the other side, and an air flow type atomizing portion. The air passage 4 is connected to the air pipe 6 at the vibration node part 5 of the vibration expansion horn.
Suitable for connecting with air pump 7 and lotus.

Further, a liquid supply connection hole 8 is opened near the tip of the airflow type atomizer 1, and a liquid inlet 9 is opened at the other end of the side wall surface of the vibration magnifying horn 2. A wall surface near the periphery of the liquid inlet 9 of the vibration amplifying horn 2 provided with the liquid inlet 9 and the outlet end 10 of the liquid supply pipe are arranged with a gap of approximately 100 million yen,
A liquid supply pipe 11 communicates with a liquid supply pump 12 and a liquid tank (not shown). In the vibration amplifying horn 2, an ultrasonic vibrator 13 and an electrode plate 14 are fixedly secured to each other by bolts 16 and nuts 17 via a mounting plate 15. The ultrasonic transducer 13 and the vibration body 15 are electrically coupled to the ultrasonic transducer 18. 19 is atomized particles.

In the above configuration, the liquid supply pump 12 is driven to supply liquid from the liquid tank (not shown) through the liquid supply pipe 11 to the outlet end of the liquid supply pipe, and the air pump 7 is driven to supply the liquid to the air supply pipe. When air is supplied to the pneumatic atomizer 1 through the air flow atomizer 6 and the air passage 4, the compressed air is ejected from the injection hole 3 at high speed, and at this time the pneumatic atomizer 1 becomes under negative pressure, so that the liquid is The liquid is sucked from the liquid inlet 9 and is supplied to the liquid supply hole 8.
The particles are ejected from the air, are torn off by high-speed air currents, atomized, and injected from the injection holes 3 to become atomized particles 19.

Here, since the airflow type atomizer 1 is provided on the vibration amplifying horn 2, the vibration of the ultrasonic vibrator 13 driven by the ultrasonic oscillator 18 is further amplified and vibrates to promote the atomization effect. FIG. 2 presents a graph showing the atomization promoting effect of ultrasonic vibration. The vertical axis shows the average particle diameter, and the machine axis shows the source pressure applied to the airflow atomizer.The solid line in the graph shows the frequency of 30KH2 and the amplitude of 8mm when ultrasonic vibration is applied, and the broken line shows the ultrasonic vibration. It shows the atomization performance of each when no sonic vibration is applied. therefore,
When the source pressure in the air flow type atomization section is high, the effect of improving atomization performance due to ultrasonic vibration is 4.0%, but when the source pressure is lowered, the atomization performance is improved due to ultrasonic vibration. By ultrasonic vibration of the airflow type atomization unit, the source pressure of the airflow type changing unit can be set low, so the air pressurization device can be changed from a large device such as an air compressor to a small air pump or It can be made into a small and lightweight device such as a high-pressure fan, and the entire device related to the atomization device can be made smaller and lighter.It is possible to obtain an atomization device that is very suitable for use in household equipment in terms of cost, lifespan, and noise. It is something that can be done. Next, another embodiment of the present invention will be described with reference to FIG.

If a pipe or the like for supplying liquid is attached to the vibration magnifying horn 2 that generates ultrasonic vibrations, the vibrations will be obstructed and the resonant impedance of the vibrator will increase, resulting in a disadvantage that it will no longer vibrate.

Therefore, according to the present invention, the wall surface in the vicinity of the liquid inlet 9 of the vibration amplifying horn 2 provided with the liquid inlet 9 and the liquid supply pipe outlet end 10 are disposed with a gap of approximately 10,000,000,000,000,000,000,000,000. The ultrasonic vibrations of the expansion horn 2 are not hindered in any way, and the liquid is transferred from the liquid supply pump 12 through the liquid supply pipe 11 due to the negative pressure created by the high-speed air of the pneumatic atomizer 1. Supply pipe outlet end 10
The liquid sent to the liquid supply pipe is sucked through the liquid inlet 9 and atomized, and even if the liquid forms a film due to surface tension in the very small gap between the wall near the liquid inlet 9 and the liquid supply pipe outlet end 10, There is no escape or inhalation of air.

As is clear from the above explanation, the atomization device of the present invention is
Since the device is equipped with a means for atomizing the liquid using a high-speed airflow and a means for ultrasonic vibration of the atomization means, good atomization properties can be obtained even if the source pressure of the airflow type atomization device is low. Because it is small and lightweight, it is low cost, has a long life, and has low operating noise.
Since the liquid supply pipe is arranged with a very small gap between the outlet and the weave, there is no interference with the ultrasonic vibrations of the vibration amplifying horn, and the ultrasonic vibrations can be driven with low power, providing a stable liquid supply. Many excellent effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is a graph showing atomization characteristics. DESCRIPTION OF SYMBOLS 1...Airflow atomization part, 2...Vibration magnifying horn, 3...Injection hole, 8...Liquid supply hole, 9...Liquid inlet, 10... Liquid supply V supply pipe outlet end, 13
・・・・・・Ultrasonic vibrator. Figure 1 Figure 2

Claims (1)

[Claims] 1. An atomization device that includes an atomization device that atomizes a liquid using a high-speed airflow, and an ultrasonic vibration device that causes the atomization device to vibrate ultrasonically.