JPH05138082A - Atomization device - Google Patents

Abstract

PURPOSE:To provide an atomization device capable of microgranulating atomized particles and making the grain diameter uniform. CONSTITUTION:A liquid nozzle 4 is provided in a gas chamber 3 and the upstream side of the gas chamber 3 is connected to a gas feed means through a gas feed pipe 5 with a spray orifice 6 provided in the downstream side of the gas chamber 3. The spray orifice 5 has an open area gradually reduced in a flow direction and forms a gas passage 8 by introduction of an impregnated element 7 in the spray orifice 6. The impregnated element 7 is fitted in the tip of a liquid nozzle 4, and is composed of a sintered ceramic body with continuous pores, with an uneven part of the same degree as the sintered particle formed on the surface of the sintered ceramic body. The gas stream, near the surface of the impregnated element 7, which is accelerated in a gas passage 8 becomes a turbulence due to the generation of a vertex, and this turbulence gas crushes a liquid film on the surface of the impregnated element 7 to turn the film to an atomized particle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atomizer used for a humidifier, a combustion device, a chemical atomizer, etc. for atomizing water, oil, a chemical solution and the like.

[0002]

2. Description of the Related Art In recent years, atomizers using a two-fluid nozzle that uses high-speed gas as an atomizing medium have been widely used in humidifiers, liquid combustion devices and the like.

Conventionally, this type of atomizing device has a structure as shown in FIG. As shown in the figure, a gas ejection port 2 is provided near the tip of the liquid nozzle 1, and the liquid supplied from a liquid supply means (not shown) is ejected from the liquid nozzle 1 as a liquid column flow. Further, gas is supplied from a gas supply means (not shown) and ejected from the gas ejection port 2 to form a high-speed gas flow that blows away the liquid column flow and atomizes it.

[0004]

However, in the above-mentioned conventional configuration, the atomization is caused by the difference in speed between the liquid column flow and the surrounding high-velocity gas flow. However, when the ejection amount of the liquid is increased, the ejection velocity of the liquid column flow is increased. And the volumetric flow rate of the liquid until it is blown away by the high-speed gas flow are large, so that the particle diameter is large, and there is a problem that it is not possible to obtain fine uniform particles in a wide range of adjusting the spray amount.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an atomizing device capable of making atomized particles finer and more uniform.

[0006]

In order to achieve the above object, the present invention provides a gas chamber communicating with a gas supply pipe, a spray port provided on the downstream side of the gas chamber, and a liquid supply provided in the gas chamber. A liquid nozzle communicating with the pipe and an impregnated body inserted at the tip of the liquid nozzle are provided, and the impregnated body is formed of a porous material having irregularities on the surface and is exposed to the spray port to form a gas. It forms a passage.

[0007]

With the above structure, the liquid supplied to the liquid nozzle permeates the individual continuous pores of the impregnated body by the capillary phenomenon and reaches the surface to form a thin liquid film. The gas supplied to the gas chamber passes through the gas passage at a predetermined flow velocity and is ejected from the spray port. At this time, since the surface of the impregnated body has irregularities, the flow in the vicinity of the surface of the impregnated body is affected by the irregularities, and turbulence such as swirling occurs and becomes turbulent gas. The liquid film of is pulverized and atomized as particles.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. As shown in the figure, a liquid nozzle 4 is provided in the gas chamber 3, the upstream side of the gas chamber 3 is connected to a gas supply means (not shown) by a gas supply pipe 5, and the downstream side of the gas chamber 3 is sprayed. A mouth 6 is provided. The opening area of the spray port 6 gradually decreases along the flow direction, and the gas passage 8 is formed by allowing the impregnated body 7 to face the spray port 6. The impregnated body 7 is inserted into the tip of the liquid nozzle 4, and the material thereof is a ceramic sintered body having continuous pores, and the surface thereof has irregularities similar to the sintered particles. The liquid nozzle 4 has a liquid passage 9 therein, and the upstream side of the liquid nozzle 4 is connected to a constant liquid level device 11 by a liquid supply pipe 10.

In the above structure, the liquid supplied to the constant liquid level device 11 is supplied to the impregnated body 7 through the liquid nozzle 4 through the liquid supply pipe 10 due to the drop in the liquid level. Further, the liquid permeates the individual continuous pores by the impregnation body 7 by a capillary phenomenon and reaches the surface to form a thin liquid film. On the other hand, the gas is supplied from the gas supply means to the gas chamber 3 through the gas supply pipe 5. At this time, the passage area of the gas passage 8 is smaller than that of the gas chamber 3, so the gas passage 8 is accelerated in the gas passage 8 and ejected from the spray port 6. At this time, the gas flow in the vicinity of the surface of the impregnated body 7 accelerated in the gas passage 8 is affected by the irregularities, and turbulence such as eddy current is generated and becomes turbulent gas. The liquid film of is pulverized and atomized as particles.

As described above, in the atomizing device of the embodiment, atomization is promoted even at a low gas flow rate, and the particles can be atomized as uniform particles having a small particle size, and the spray amount depends on the surface area of the impregnated body 7. When the spray amount is controlled and the spray amount is small, the liquid film is formed only on a part of the surface of the impregnated body 7, not on the entire surface, but the spray amount can be adjusted in a wide range from a large spray amount to a small spray amount. And can be atomized as uniform particles having a small particle size.

[0011]

As is apparent from the above-described embodiments, the atomizing device of the present invention has a gas chamber communicating with a gas supply pipe, a spray port provided on the downstream side of the gas chamber, and a liquid provided in the gas chamber. A liquid nozzle communicating with the supply pipe and an impregnating body inserted at the tip of the liquid nozzle are provided, and the impregnating body is formed of a porous material having uneven portions on its surface and faces the spray port. A gas passage is formed. With this structure, the atomized particles can be made finer and more uniform in size, and the performance can be improved.

[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 partial sectional view of a conventional atomizing device.

[Explanation of Codes] 3 Gas Chamber 4 Liquid Nozzle 5 Gas Supply Pipe 6 Spray Port 7 Impregnator 8 Gas Passage 10 Liquid Supply Pipe

 ─────────────────────────────────────────────────── ─── 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 gas chamber communicating with a gas supply pipe, a spray port provided on the downstream side of the gas chamber, a liquid nozzle provided in the gas chamber and communicating with the liquid supply pipe, and a tip of the liquid nozzle. An atomizing device comprising: an impregnated body inserted and attached, wherein the impregnated body is formed of a porous material having a concavo-convex portion on a surface thereof and a gas passage is formed facing the spray port.