JPH0747308A - Atomizer - Google Patents

Abstract

PURPOSE:To atomize a liquid as fine particles at the large controllable width for the atomization quantity by turning the liquid which is flown in from a revolving introducing opening after being pressurized in a liquid supply part a revolving chamber, into the revolving stream and jetting it from a jetting hole to the outside in liquid film state while revolving with a hollow reverse conical film. CONSTITUTION:The revolving introducing opening 10 is provided so as to be in contact with the revolving chamber 9 and is connected to a pump 12 with a liquid passage 11 at the upstream side and the jetting hole 14 is provided at the end face of the down stream side of a body 13 constituting the revolving chamber 9. The liquid supplied to the pump 12 is pressurized to a prescribed pressure, flows in the revolving chamber 9 from the revolving introducing opening 10 at a prescribed speed through the liquid passage 11 to from the revolving stream and is jetted from the jetting hole 14 to the outside while revolving with the hollow reverse conical film. Because the speed of the revolving stream in the revolving chamber 9 is increased when the atomizing quantity is small and the liquid is jetted from the jetting hole 14 while revolving with the hollow reverse conical film, the liquid film is divided into small pieces by shearing force and the liquid is atomized at the large controllable width for the atomizing quantity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atomizing device for atomizing water, oil, drug solution, etc.
It is used for combustion equipment.

[0002]

2. Description of the Related Art In recent years, atomizers using liquid pressure nozzles have been used in humidifiers, liquid combustors and the like. Conventionally, as this type of atomizing device, there is one having a configuration shown in FIG. As shown in the figure, the liquid is pressurized by a pressure pump 1, supplied to a nozzle 3 through a pipe 2, and swirls in a liquid chamber 6 by passing through a swirling groove 5 provided in a truncated cone-shaped swiveling piece 4. It becomes a flow and is ejected from the spray port 7 as a hollow inverted conical film 8. Since a shearing force is generated in the hollow inverted conical membrane 8 due to the relative velocity difference between the jetting speed and the swirling speed of the liquid and the surroundings, the liquid film is divided and atomized.

[0003]

However, in the above-mentioned conventional configuration, when the atomization amount is reduced, the liquid flow rate is reduced, and the ejection speed and the ejection speed of the liquid ejected as the hollow inverted conical film 8 from the atomizing port 7 are reduced. Since the swirling speed decreases, the relative speed difference with the surroundings decreases, the liquid film thickness of the hollow inverted conical film 8 increases, and the shearing force acting on the liquid film also decreases. There is a problem that the variable width of the atomization amount cannot be large because the particle size to be generated becomes large and the atomization state deteriorates.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an atomizing device capable of atomizing a liquid as fine particles in a variable width with a large amount of atomization.

[0005]

In order to achieve the above object, the present invention has a body having a swirl chamber filled with liquid, an ejection hole provided on an end face on the downstream side of the body, and the swirl chamber. A swirl inlet for introducing a liquid so as to generate a swirl flow, a liquid passage communicating with the swirl inlet, a liquid supply unit connected to the liquid passage, and a bottom of the swirl chamber forming a bottom portion of the swirl chamber. A connecting shaft having a portion and a drive unit for driving the connecting shaft are provided.

[0006]

According to the present invention, with the above-described structure, the liquid pressurized in the liquid supply section, passed through the liquid passage, and accelerated to a predetermined speed at the swirl introduction port flows into the swirl chamber, so that a swirl flow is generated in the swirl chamber. The liquid is ejected from the ejection hole to the outside while being swirled by the hollow inverted conical film, and the liquid film is divided into small pieces by the shearing force due to the ejection speed of the liquid film and the relative speed difference between the swirling speed and the surroundings. Can be atomized as fine particles. When the amount of atomization is small, the supply amount from the liquid supply unit decreases and the inflow speed from the swirl introduction port decreases, but by raising the connecting shaft by the drive unit, the flow passage area of the swirl introduction port is reduced. It can be made smaller to increase the inflow velocity into the swirl chamber. That is, the swirling flow in the swirling chamber can be accelerated, and the liquid is jetted outward from the jet holes while swirling in the hollow inverted conical membrane. Therefore, since the liquid film is divided into small pieces by the shearing force due to the relative speed difference between the jetting speed and the swirling speed of the liquid film and the surroundings, it is possible to atomize with a wide variable range of atomization amount.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. 9 in FIGS. 1, 2 and 3.
Is a cylindrical swirl chamber 9, which is provided with a swirl inlet 10 so as to be in contact with the swirl chamber 9, and the upstream side is connected to a pump 12, which is a liquid supply section, by a liquid passage 11, and a body forming the swirl chamber 9 is formed. A jet hole 14 is provided on the end face on the downstream side of 13, and a connecting shaft 16 having a swirl chamber bottom portion 15 that constitutes the bottom portion of the swirl chamber 9 is driven via an O-ring 17 that is a liquid seal portion. It is connected to the motor unit 18, which is a unit.

In the above structure, the liquid supplied to the pump 12, which is the liquid supply unit, is pressurized to a predetermined pressure, passes through the liquid passage 11, flows from the swirl inlet 10 into the swirl chamber 9 at a predetermined speed, and swirls. A flow is formed and jetted outward from the jet hole 14 while swirling with a hollow inverted conical membrane. Due to the jetting speed of the liquid film and the relative speed difference between the swirling speed and the surroundings, a shearing force is generated in the liquid film. Because it is divided into small pieces,
Can be atomized as fine particles. When the atomization amount is small, the supply amount from the liquid supply unit 12 decreases and the inflow speed from the swirl introduction port 10 decreases. However, by raising the connecting shaft 16 by the motor unit 18 which is a drive unit, The flow passage area of the introduction port 10 can be reduced and the inflow velocity into the swirl chamber 9 can be increased. That is, when the amount of atomization is small, the swirling flow in the swirling chamber 9 is accelerated, and the liquid is jetted from the jet holes 14 to the outside while swirling with a hollow inverted conical film. Therefore, the liquid film is divided into small pieces by the shearing force due to the relative speed difference between the ejection speed and the swirling speed of the liquid film and the surroundings.
Can be atomized with a wide variable range of atomization amount.

[0009]

As described above, according to the atomizing device of the present invention, the liquid pressurized in the liquid supply portion and flowing in from the swirl introduction port becomes a swirl flow in the swirl chamber, and flows toward the outside from the ejection hole. It is jetted in a liquid film shape while swirling with a hollow inverted conical film and divided into small pieces by a shearing force, so that it can be atomized as fine particles. When the amount of atomization is small, the inflow velocity from the swirl introduction port decreases, but by raising the connecting shaft by the drive unit, the flow passage area of the swirl introduction port can be reduced and the inflow velocity into the swirl chamber can be increased. . Therefore, the swirling flow in the swirling chamber can be accelerated, and even when the atomization amount is small, the liquid film ejected from the ejection hole can be divided into small pieces by the shearing force, so that the atomization can be performed in a wide variable range of the atomization amount.

[Brief description of drawings]

FIG. 1 is a side sectional view of an atomizing device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a main part of the atomizing device.

FIG. 3 is a sectional view of the upper part of the main part of the atomizing device.

FIG. 4 is a sectional view of a main part of a conventional atomizing device.

[Explanation of symbols]

 9 swirl chamber 10 swirl introduction port 11 liquid passage 12 liquid supply part 13 body 14 jet hole 15 swirl chamber bottom part 16 connecting shaft 18 drive part

Front page continued (72) Inventor Katsuhiko Uno 1006 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A body having a swirl chamber filled with liquid, a jet hole provided on an end face on the downstream side of the body, and a swirl inlet port for introducing liquid so as to generate a swirl flow in the swirl chamber. A liquid passage communicating with the swirl introduction port, a liquid supply part connected to the liquid passage, a connecting shaft having a swirl chamber bottom part forming a bottom part of the swirl chamber, and a drive for driving the connecting shaft. Atomization device consisting of parts.