JPS6244988B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid atomization device that atomizes liquid fuel such as kerosene or light oil, water, medicinal solution, recording liquid, etc. using an electric vibrator. .

Configurations of Conventional Examples and Their Problems Various types of liquid atomization devices have been proposed in the past, and many of them use electric vibrators such as piezoelectric elements.

For example, (1) a piezoelectric element is bolted or glued to a horn-shaped vibrator, the mechanical vibration amplitude of the piezoelectric element is amplified by the horn-shaped vibrator, and a liquid is supplied and dripped onto the amplitude amplifying surface at the tip of the horn. An amplitude amplification type ultrasonic atomizer that atomizes by
There is a liquid fuel combustion device, as shown in Japanese Patent Publication No. 2003-11101, which atomizes a thin liquid stream ejected under pressure against an object to be collided with.

FIG. 1 shows a partial vertical cross-sectional side view of the liquid fuel combustion device of (2) above. Reference numeral 1 denotes a nozzle that injects pressurized liquid fuel as a thin linear flow, and is connected to a fuel tank 4 via a fuel pressurizing pump 3 at a fuel supply pipe 2 . 5 is liquid fuel injected as a linear stream thinner than the nozzle 1; Reference numeral 6 denotes a cylindrical burner, which has a combustion section 7 formed therein, and is provided with a collision body 8 that causes the jetted liquid flow 5 to collide with it. Reference numeral 9 denotes a blower fan that supplies combustion air to the burner 6 via the air passage 10, and 11 denotes a flow regulator that smoothly supplies combustion air to the combustion section 7.

However, these atomizing devices have the following problems.

The atomization device (1) requires high machining precision for the horn-shaped vibrator and a pump to supply the liquid, so it is expensive, and the method of supplying the liquid to the atomization surface is complicated. It was hot. Further, in order to obtain an atomization amount of 20 c.c./min, a considerably large power consumption of 5 to 10 watts is required, and the atomization performance is not sufficient.

In addition, in the atomization means of the liquid fuel combustion device (2), the liquid that hits the collision body 8 is a thin linear flow, and collision alone is not sufficient to achieve atomization, leaving problems with atomization performance. . Furthermore, the liquid needs to be pressurized to be sprayed from the nozzle 1, making the device as a whole expensive.

Purpose of the Invention The present invention eliminates the drawbacks of the conventional atomization device, has a simple configuration, is compact, consumes low power, and achieves a sufficient atomization state, that is, atomization of the atomized liquid. The purpose is to provide an atomization device that

Configuration of the Invention The configuration and operation of the present invention will be explained with reference to FIG.
12 is a liquid atomizer including an electric vibrator 13. Reference numeral 14 designates a nozzle for ejecting droplets, which communicates with a fuel tank 16 via a fuel supply pipe 15 . Reference numeral 17 denotes a drive unit for vibrating the electric vibrator (eg, piezoelectric element, etc.) 13. The droplets 18 ejected from the nozzle 14 collide with a vibrating body 19 arranged in the direction of the ejection, and are further atomized.

Here, the ejected droplets are generated by the electric vibrator 13
The nozzle 14 with a predetermined vibration period excited by
A vibrating body 1 that flies out from and faces each other as individual droplets.
Collision with 9. This collision energy causes the individual droplets to break into even smaller pieces, and mechanical vibrations are excited in the vibrating body 19. Since the vibrating body 19 is composed of a small object whose natural resonance frequency approximately matches the period of the ejected droplets, the mechanical vibration excited by the collision of the droplets continues. .

Furthermore, the particle size of colliding droplets can be further reduced by forcibly generating mechanical vibrations in the vibrating body 19 using a second electric vibrator separate from the nozzle 14 section. In addition, pipe 15 and tank 1
6 is not necessarily necessary.

DESCRIPTION OF EMBODIMENTS Next, an embodiment of the present invention will be described using the oil hot air fan shown in FIG. 3 as an example.

Components with the same numbers as in FIG. 2 are the same components. Reference numeral 20 denotes a case into which combustion air is introduced by a fan 21 through an air introduction pipe 22. Due to the action of the fan 21, the inside of the pipe 23 becomes negative pressure, and the kerosene in the fuel tank 16 (including the liquid level regulator) is filled into the pressurizing chamber 24 via the communication pipe 15. 25 is a gas discharge path leading to the pipe 23. A nozzle plate 26 faces the pressurizing chamber and has an opening for discharging droplets at its tip. 27 is an electric vibrator that excites the kerosene in the pressurizing chamber 24;
8 indicates the base body. Reference numeral 29 denotes a controller that controls the operation sequences of hot air machine components such as a drive unit that vibrates the electric vibrator 27 (here, a piezoelectric element is shown) and a fan. 30 is a fan for sending hot air, and 31 is a combustion section.
Explanation of the igniter, ignition detector, etc. is omitted.

Pressurized chamber 2 excited by the piezoelectric element 27
The fuel kerosene in 4 is ejected from the nozzle 26 as individual droplets, and the plate-shaped vibrating body 1 is disposed opposite to the kerosene.
Collision with 9. As described above, the droplet is broken into fine particles due to the collision phenomenon, becomes fine particles, mixes with the introduced air, and is sent to the combustion section 31, where combustion continues. By applying the liquid atomized only by the nozzle to the vibrating body 19 whose resonance frequency is approximately equal to the collision frequency of the ejected droplets, a better atomization state can be obtained and the liquid can be used as a combustion device. Improves combustion performance.

In addition, as explained in the above-mentioned component, by separately exciting the vibrating body 19 itself by the second electric vibrator, the droplets ejected from the nozzle 26 can be made more efficient by the vibration of the vibrating body 19. It is possible to atomize finely.

Effects of the Invention As explained above, according to the atomization device of the present invention, the liquid in the pressurized chamber excited by the electric vibrator is ejected as droplets from the nozzle, and the droplets are ejected in the direction of ejection. By causing the particles to collide with a vibrating body placed in the area, further atomization can be achieved, and good atomization characteristics as an atomization device can be obtained. Further, by making the resonant frequency of the vibrating body that causes the droplets to collide to be approximately the same as the droplet collision frequency, it becomes easier to continue the vibration due to the collision energy. With the above configuration,
As an atomizer, it is compact and has low power consumption.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a liquid fuel combustion device having a conventional atomization means, Fig. 2 is a schematic block diagram of an atomization device of the present invention, and Fig. 3 is an oil hot air blower using an embodiment of the present invention. FIG. 13... Electric vibrator, 12... Liquid atomizer,
18...Discharged droplet, 19...Vibrating body.

Claims (1)

[Scope of Claims] 1. An atomizing device configured to cause liquid droplets discharged from a liquid atomizer equipped with an electric vibrator to collide with a vibrating body disposed opposite to the atomizer. 2. The atomization device according to claim 1, wherein the vibrating body is configured to be excited with mechanical vibrations by collisions of discharged droplets. 3. The atomization device according to claim 2, wherein the natural resonance frequency of the vibrating body is approximately equal to the collision frequency of the ejected droplets. 4. The atomization device according to claim 1, wherein the vibrating body is configured to be excited to vibrate by a second electric vibrator.