JPH04334566A - Atomizing device - Google Patents

Abstract

PURPOSE:To obtain an atomizing device capable of making atomized particles further finer uniformly and also widening an adjustable atomization volume range. CONSTITUTION:The subject device consists of an electric oscillator 10 which generates oscillation using an oscillation device 11, and an oscillating element 12 connected to the end of the oscillator 10 and a porous body 15 for atomization arranged on the top end of the oscillating element 12. In addition, the oscillating element 12 has a feed orifice 13 through which liquid such as water, petroleum is conducted to the porous body 15. The electric oscillator 10 is driven by the oscillation device 11 and the oscillating element 12 becomes oscillated resulting in the oscillation of the porous body 15. Thus the liquid conducted from the feed orifice 13 becomes atomized.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an atomizer that atomizes liquids such as water, oil, and medical solutions by vibration, and more particularly to an atomizer that uses an electric vibrator such as a piezoelectric element. .

0002

2. Description of the Related Art In recent years, injection type atomizers using electric vibrators have been used in humidifiers, liquid combustion devices, and the like.

Conventionally, this type of atomization device has a configuration as shown in FIG. As shown in the figure,
A horn-shaped vibrator 1 is made of duralumin or the like, and the vibration amplitude of a piezoelectric element 2 fixed to the vibrator 1 is amplified by an oscillator 3, and a supply pipe 5 is connected to a nozzle 4 at the tip of the vibrator 1. It was designed to supply liquid and atomize it.

0004

However, in the conventional configuration described above, the thickness of the liquid film on the surface of the nozzle 4 controls the particle size, and it is extremely difficult to obtain a uniformly thin liquid film. Because of this difficulty, the particle size of atomization is large and the uniformity is poor, there are difficulties in atomization performance, and there are problems in that the adjustment range of the amount of atomization is small.

The present invention solves the above-mentioned conventional problems, and aims to provide an atomizing device that can atomize and uniformize atomized particles and expand the control range of the amount of atomized.

[0006]

[Means for Solving the Problems] The present invention achieves the above object, and as a first means for solving the problems, an oscillator,
The oscillator includes an electric vibrator for generating vibrations, and a vibrating body connected to the electric vibrator and having a liquid supply hole. It has a configuration in which a porous body for spraying is arranged, and the cross-sectional area of the tip of the vibrating body is smaller than the cross-sectional area of the side connected to the electric vibrator, and a gas passage is provided around the porous body. It has a configuration with.

[0007]

[Function] With the above structure, the first effect is that when the electric vibrator is driven, the porous body connected to the vibrator is vibrated. At this time, the liquid supplied to the porous body from the liquid supply hole impregnates the porous body and forms a liquid pool in each micropore of the porous body. Vibration is transmitted to the liquid pool, causing it to vibrate, making it possible to atomize fine particles with uniform particle size. The amount of atomization can be adjusted to adjust the amount of liquid supplied, and the second effect is
The vibration energy is focused on the tip of the vibrating body, the porous body is vibrated strongly, the liquid pool is also strongly vibrated, particles are miniaturized, and as a third effect, the gas flow is increased by the gas passage. is accelerated and a shearing force is generated on the liquid pool in the porous body, and the synergistic effect with the vibration makes it possible to miniaturize the particles.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. As shown in the figure, an electric vibrator 10 such as a piezoelectric element that generates vibrations is made of a material such as lead titanate zirconate porcelain, and is made of a pair of vibrators that are electroded by coating both end surfaces with silver. They are electrically connected in parallel and stacked. The oscillator 11 has an amplifier circuit, an oscillation circuit, etc., and supplies its output to the electric vibrator 10. Vibrating body 12
is connected to an electric vibrator 10, has a liquid supply hole 13 therein, and communicates with a porous body 15 provided on the top surface from a pipe 14 provided on the side surface. The material of the vibrating body 12 is made of metal such as duralumin or stainless steel, so that the vibrations generated by the electric vibrator 10 can be focused and transmitted to the porous body 15 connected to the vibrating body 12 at an appropriate vibration amplitude. ing. The porous body 15 connected to the vibrating body 12 is formed of a porous material having a large number of communicating micropores, and is a supply path connected to a liquid source (not shown) via a pipe 14. Liquid is supplied from the liquid supply hole 13 and impregnated into each micropore.

In the above configuration, when the oscillator 11 is started, the electric vibrator 10 is driven, and the porous body 15 connected to the vibrator 12 is vibrated with an appropriate vibration amplitude. At this time, the liquid supplied from the liquid supply hole 13 to the porous body 15 impregnates the porous body 15 and forms a liquid reservoir in each micropore of the porous body 15. By excitation with an appropriate vibration amplitude, the vibration is transmitted to the liquid pool of each micropore and atomization is performed in a very small liquid pool, resulting in uniform atomization of microparticle size. Can be done. By adjusting the amount of liquid supplied to the porous body 15, the amount of atomization can be adjusted over a wide range.

FIG. 2 shows a second embodiment of the present invention, and the same parts will be described using the same reference numerals. The difference from the first embodiment is that the cross-sectional area of the tip of the vibrating body 12a is made smaller than the cross-sectional area of the side where it is joined to the electric vibrator 10. According to this configuration, due to the focusing effect of vibration energy, a large vibration amplitude is concentrated at the tip of the vibrating body 12a, and the small porous body 15a connected to the tip is strongly vibrated. The formed liquid pool is also strongly vibrated, making it possible to obtain uniform atomization with finer particle sizes.

FIG. 3 shows a third embodiment of the invention. In the figure, the same parts are denoted by the same reference numerals as in FIG. 1. The difference from the first embodiment is that a gas passage 17 is provided around a truncated cone-shaped porous body 15b by a cylinder 16, and a gas passage 17 is provided along the outer peripheral surface of the porous body 15b to form a ventilation passage 18. It is narrower. 19 is gas passage 1
This is a fan that sends air to 7. According to this configuration, the ventilation passage 18 can be uniformly narrowed to increase the gas flow rate, and a shearing force is generated on each fine liquid pool in the porous body 15b. As a result, the synergistic effect of vibration and shear force has the effect of promoting atomization of spray particles.

[0013]

Effects of the Invention As is clear from the above embodiments, the atomization device of the present invention includes an oscillator, an electric vibrator that generates vibrations by the oscillator, and a liquid supply hole connected to the electric vibrator. a vibrating body, and a porous body for spraying is arranged on the upper end surface of the vibrating body and in contact with the liquid supply hole, and with this configuration, atomization and uniformity of spray particles can be achieved. can be measured, and the amount of spray can be adjusted over a wide range.

[Brief explanation of the drawing]

FIG. 1: A sectional view of the main parts of an atomization device in a first embodiment of the present invention.

[Fig. 2] A cross-sectional view of the main parts of the atomization device in the second embodiment of the present invention.

[Fig. 3] A cross-sectional view of the main parts of the atomization device according to the third embodiment of the present invention.

[Figure 4] Cross-sectional view of main parts of a conventional atomization device

[Explanation of symbols]

10 Electric vibrator 12 Vibrating body 13 Liquid supply hole 15 Porous body

Claims (3)

[Claims] 1. An oscillator, an electric vibrator that generates vibrations by the oscillator, and a vibrating body connected to the electric vibrator and having a liquid supply hole, wherein the upper end surface of the vibrating body has a liquid supply hole. Atomization device with a porous body for spraying in contact with the supply hole. 2. The atomization device according to claim 1, wherein the cross-sectional area of the tip of the vibrating body is smaller than the cross-sectional area of the side connected to the electric vibrator. Claim 3: Claim 1, wherein a gas passage is provided around the porous body.
The atomization device described.