JPH05337404A - Atomizing device - Google Patents

Abstract

PURPOSE:To provide an atomizing device which has a wide variable range of the atomized amount and atomized liquid to ultra-fine particles. CONSTITUTION:Liquid is supplied to a liquid nozzles 9 having a spray hole 12 by a pump 11. A rotor 13 installed inside the nozzle 9 is rotated by a motor 16. Therefore, when liquid is forcibly supplied to the liquid nozzle 9 by the pump 11 to rotate the rotor 13, the liquid is jetted from the spray hole 12 while swirling in a hollow reverse cone to drive and atomize the liquid film by the jet velocity and the relative velocity difference between the swirling velocity and the surrounding.

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 circular 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 the hollow inverted conical membrane 8 is sheared due to the difference in the jetting speed and the swirling speed of the liquid and the relative velocity with 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 atomized particle size increases and the atomization state deteriorates. Further, the particle diameter becomes smaller as the liquid film thickness of the hollow inverted conical membrane 8 becomes thinner. Therefore, in order to atomize with a smaller particle diameter, it is necessary to reduce the diameter of the spray port 7 and increase the swirling speed. Therefore, it is necessary to reduce the liquid film thickness of the hollow inverted conical film 8 formed,
When the spray port 7 is made smaller, the swirling flow velocity in the liquid chamber 6 is slowed down when passing through the spray port 7, so that the swirling force becomes small and the liquid film thickness becomes large, so that the particle diameter becomes large and Even if the mouth 7 is made small, the particle diameter does not become small, and there is a problem that the liquid cannot be atomized as ultrafine particles.

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

[0005]

In order to achieve the above object, the present invention provides a rotating body provided at an end of a connecting shaft, a drive unit provided at the other end of the connecting shaft, and the rotating body. A liquid nozzle that includes a body to form a flow path with a side portion of a rotating body, a spray port provided at a downstream end of the liquid nozzle, and a spray port and a downstream side end portion of the rotating body. A liquid chamber constituted by, and a liquid supply pipe communicating with the upstream side of the liquid nozzle,
A liquid supply section communicating with the liquid supply pipe is provided.

[0006]

According to the present invention, according to the above-described structure, the liquid pressurized in the liquid supply portion and supplied to the liquid nozzle through the liquid supply pipe is filled inside the liquid nozzle, and the liquid is provided between the side portion of the rotating body and the inner surface of the liquid nozzle. The formed flow path and the liquid chamber are filled with the liquid, and the liquid pressure in the liquid chamber rises. At this time, a rotational force is generated by the drive unit, and this rotational force is transmitted to the rotating body by the connecting shaft to rotate the rotating body, so that the liquid in contact with the rotating body moves in the rotation direction by viscous force. , A swirling flow is generated in the liquid chamber, and the liquid is jetted from the spray port toward the outside while swirling with a hollow inverted conical film, and the liquid film is formed by the jetting speed of the liquid film and the relative speed difference between the swirling speed and the surroundings. It can be atomized because it is divided into small pieces by shearing force. When the amount of atomization is small, the ejection speed from the spray port decreases, but by increasing the rotation speed of the rotating body, the swirling speed of the liquid film can be increased, so the relative speed difference with the surroundings can be reduced. Since the liquid film can be made large, and the liquid film is divided into small pieces by the shearing force, it can be atomized in a wide variable range of the atomization amount. When the spray port is made smaller, the liquid film thickness of the hollow inverted conical membrane becomes thinner and the particle size also becomes smaller, but when the spray port is too small, the swirling flow velocity in the liquid chamber is slowed down when passing through the spray port. So
Although the swirling force tends to be small, since the swirling speed of the liquid film can be increased by increasing the rotating speed of the rotating body, it is possible to reduce the diameter of the spray port and increase the swirling speed. It is possible to form a hollow inverted conical film having a thin liquid film thickness and atomize the liquid as ultrafine particles.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 9 denotes a liquid nozzle, the upstream side of which is connected to a pump 11 which is a liquid supply portion by a liquid supply pipe 10, and a spray port 12 is provided at an end portion on the downstream side. The rotating body 13 provided inside the liquid nozzle 9 has a connecting shaft 14
Is connected to a motor 16 that is a drive unit fixed to the outside of the bottom of the liquid nozzle 9 through the seal portion 15 using an O-ring, and the side surface of the rotating body 13 and the inner surface of the liquid nozzle 9 are connected. It is held so as to form a flow path therebetween. A protrusion 17 is provided at the downstream end of the rotating body 13, and a liquid chamber 18 is formed between the downstream end of the rotating body 13 and the spray port 12. The motor 16 is electrically connected to the control unit 19.

In the above structure, the liquid supplied to the liquid supply unit 11 is pressurized to a predetermined pressure, passes through the liquid supply pipe 10, and is filled inside the liquid nozzle 9, and the rotor 13 and the inner surface of the liquid nozzle 9 are filled. And the liquid chamber 18 is filled with the liquid and the liquid pressure rises. At this time, a rotating force is generated by the motor 16 which is a driving unit, and this rotating force is transmitted to the rotating body 13 by the connecting shaft 14 so that the rotating body 13 is continuously rotated. Since the liquid in contact with the portion 17 continuously moves in the same direction as the rotation direction due to the viscous force with the wall surface, a swirling flow is formed in the liquid chamber 13 and the liquid pressure in the liquid chamber 13 increases, Is jetted from the spray port 12 while swirling with a hollow inverted conical film, and a relative velocity difference between the jetting speed and swirling speed of the liquid and the surroundings is generated, so a shearing force acts on the liquid film and the liquid film is divided into small pieces, resulting in atomization. There is an effect that you can. When the atomization amount is small, the ejection speed from the spray port 12 decreases, but the control unit 1
By increasing the rotation speed of the motor 16 and increasing the rotation speed of the rotating body 13 by means of 9, the swirling speed of the liquid film can be increased, so that the relative speed difference with the surroundings can be increased and the liquid film can be increased. Since it is divided into small pieces by shearing force, there is an effect that it can be atomized with a wide variable range of atomization amount.
When the spray port 12 is made smaller, the liquid film thickness of the hollow inverted conical film becomes smaller and the particle size also becomes smaller, but when the spray port 12 is too small, the swirling flow velocity in the liquid chamber 18 passes through the spray port 12. The swirling force tends to be small because the speed is reduced at this time, but the swirling speed of the liquid film can be increased by increasing the rotating speed of the rotating body 13, so that the spray port 1
Since the diameter of 2 can be reduced and the swirling speed can be increased, it is possible to form a hollow inverted conical membrane having a thin liquid film thickness and to atomize the liquid as ultrafine particles.

[0009]

As described above, according to the atomizing device of the present invention, the following effects can be obtained. (1) By pressurizing the liquid by the liquid supply unit and rotating the rotating body by the rotating force of the drive unit, the liquid in contact with the rotating body moves in the rotating direction by viscous force, so that a swirling flow is generated in the liquid chamber. The liquid film is spouted from the spray port toward the outside while swirling with a hollow inverted conical film, and the liquid film is divided into small parts by the jetting speed of the liquid and the relative speed difference between the swirling speed and the surroundings, so that atomization is possible. . (2) When the atomization amount is small, the ejection speed from the spray port decreases, but the swirling speed of the liquid can be increased by increasing the rotation speed of the rotating body, so the relative speed with the surroundings. The difference can be increased and the liquid film is divided into small pieces by the shearing force, so that the liquid film can be atomized with a wide variable range of atomization amount. (3) When the spray port is made smaller, the liquid film thickness of the hollow inverted-conical membrane becomes thinner and the particle size also becomes smaller. However, when the spray port is too small, the swirling flow velocity in the liquid chamber will be small when passing through the spray port. The swirling force tends to be small because the speed is reduced to 1. However, since the swirling speed of the liquid can be increased by increasing the rotating speed of the rotating body, the diameter of the spray port can be reduced and the swirling speed can be increased. Therefore, it is possible to form a hollow inverted conical film having a thin liquid film thickness and atomize the liquid as ultrafine particles.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a rotating body in the device.

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

[Explanation of symbols]

 9 Liquid Nozzle 10 Liquid Supply Pipe 11 Liquid Supply Section 12 Spray Port 13 Rotating Body 14 Connection Shaft 16 Motor 18 Liquid Chamber

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Uno 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A rotary body provided at an end of a connecting shaft, a drive unit provided at the other end of the connecting shaft, and a side portion of the rotary body and a flow path including the rotary body. And a spray nozzle provided at the downstream end of the liquid nozzle,
Atomization consisting of a liquid chamber constituted by the spray port and the downstream end of the rotating body, a liquid supply pipe communicating with the upstream side of the liquid nozzle, and a liquid supply unit communicating with the liquid supply pipe. apparatus.