JP3307011B2 - Atomization equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atomizer for atomizing water, oil, a chemical solution and the like, which is used for medical equipment such as humidifiers and chemical atomizers, combustion equipment, and the like.

[0002]

2. Description of the Related Art In recent years, atomizers using a liquid pressurizing nozzle have been used in humidifiers, liquid burners and the like. 2. Description of the Related Art Conventionally, as this type of atomizing apparatus, 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 swirled in a liquid chamber 6 by passing through a swirl groove 5 provided in a frustum-shaped swirl 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 film 8 due to the relative velocity difference between the ejection 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 construction, the liquid film is divided by the shearing force acting on the liquid film of the hollow inverted conical film 8, and fine particles are formed.
At the outer periphery of the inverse conical spray, there is a problem that the particle group is larger than the central part and a uniform particle diameter cannot be obtained. Also, reducing the amount of atomization reduces the liquid flow rate,
Since the ejection speed and swirling speed of the liquid ejected as a hollow inverted conical film 8 from the spray port 7 are reduced, the relative velocity difference from the surroundings is reduced, and the liquid film thickness of the hollow inverted conical film 8 is reduced. As the thickness increases and the shearing force acting on the liquid film also decreases, the particle size formed by the division of the liquid film increases, and the atomization state deteriorates. there were.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an atomizing apparatus which can atomize a liquid as uniform fine particles and has a large variable width of the amount of atomization.

[0005]

In order to achieve the above object, the present invention provides, in a first technical means, a spray nozzle for spraying a liquid, and a liquid supply for supplying the liquid via a liquid passage connected to the spray nozzle. And a heating element provided so as to surround the downstream side of the spray nozzle, and an ejection port smaller than a spray pattern provided on the heating element so as to face the spray nozzle.

A second technical means of the present invention is a spray nozzle for spraying a liquid, a liquid supply unit for supplying a liquid through a liquid passage connected to the spray nozzle, and a liquid supply section surrounding the spray nozzle. A heating element provided on the heating element, an ejection port smaller than the spray pattern provided on the heating element in opposition to the spray nozzle, a temperature detecting means provided near the ejection port, and a temperature of the heating element. And temperature control means for controlling the temperature.

[0007]

According to the present invention, in the first technical means, among the liquid particles sprayed in a reverse conical shape from the spray nozzle through the liquid passage while being pressurized by the liquid supply unit, the particles having a small particle diameter at the center are used. The groups are ejected as they are from an ejection port smaller than the spray pattern of the heating element provided so as to surround the downstream side of the spray nozzle, but particles having a large particle diameter at the outer periphery of the spray are heated to a predetermined temperature. Since it comes into contact with the inner wall surface of the heated body and evaporates and is ejected from the ejection port as a group of particles having a small particle diameter, the liquid can be atomized as uniform fine particles with a smaller amount of heat than vaporizing the entire amount.

In the second technical means of the present invention, when the amount of spray is reduced by reducing the amount of pressurization in the liquid supply unit, the ejection speed from the spray nozzle is reduced, and the particle diameter of the outer periphery of the spray is reduced. As the number of large particles increases, the amount of evaporation on the inner wall surface of the heating element increases, and the temperature of the inner wall surface decreases.However, the temperature decrease is detected by the temperature detecting means provided near the ejection port, and the predetermined temperature is detected. By increasing the temperature by the temperature control means so that the inner wall surface temperature can be kept constant at a predetermined temperature, particles having a large particle diameter at the outer periphery of the spray also evaporate on the inner wall surface of the heating body, Since the particles are ejected from the ejection port as a group of particles having a small particle diameter, the liquid can be atomized as uniform fine particles with a variable width of a wide spray amount.

[0009]

An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 9 denotes a spray nozzle, an upstream side of which is communicated with a pump 11 which is a liquid supply unit by a liquid passage 10, and an upstream opening of a heating body 12 provided so as to surround a downstream side of the spray nozzle 9. The spray nozzle 9 is arranged facing the spray nozzle 9, and an ejection port 14 smaller than the spray pattern is provided at a position facing the spray nozzle 9. A heater 15 is embedded in the heating body 12, and a heat insulating material 1 is provided on the outside.
6 are provided.

In the above configuration, the liquid supplied to the pump 11, which is a liquid supply unit, is pressurized to a predetermined pressure, passes through the liquid passage 10, and is sprayed from the spray nozzle 9 in an inverted conical shape. Air is sucked through the opening 13 around the nozzle 9. Among the sprayed liquid particles, a group of particles having a small particle diameter at the center portion is directly ejected from the ejection port 14 smaller than the spray pattern of the heating body 12 provided so as to surround the downstream side of the spray nozzle 9, Particles having a large particle diameter at the outer periphery of the spray come into contact with the inner wall surface of the heating body 13 heated to a predetermined temperature by the heater 15, and evaporate to become particles having a small particle diameter from the ejection port 14. Since the liquid is ejected, the liquid can be atomized as uniform fine particles with a smaller amount of heat than vaporizing the entire amount.

Another embodiment of the present invention will be described with reference to FIG. In FIG. 2, reference numeral 9 denotes a spray nozzle, an upstream side of which is connected to a pump 11 which is a liquid supply unit by a liquid passage 10, and an upstream opening of a heating body 12 provided so as to surround the downstream side of the spray nozzle 9. The spray nozzle 9 is arranged facing the spray nozzle 9, and an ejection port 14 smaller than the spray pattern is provided at a position facing the spray nozzle 9. A heater 15 is embedded in the heating body 12, and a heat insulating material 16 is provided on the outside.
Covered with. The output of the thermistor 17 as a temperature detecting means provided near the ejection port 14 is
5 is provided with a temperature control means 18 for controlling the calorific value.

In the above configuration, the liquid supplied to the pump 11, which is a liquid supply unit, is pressurized to a predetermined pressure, passes through the liquid passage 10, and is sprayed from the spray nozzle 9 in an inverted conical shape. Air is sucked through the opening 13 around the nozzle 9. Among the sprayed liquid particles, a group of particles having a small particle diameter at the center is directly ejected from an ejection port 14 smaller than a spray pattern of a heating body 12 provided so as to surround a downstream side of the spray nozzle 9, Particles having a large particle diameter on the outer periphery of the spray come into contact with the inner wall surface of the heating body 13 heated to a predetermined temperature by the heater 15 and evaporate, and become small particles having a small particle diameter from the outlet 14. Since the liquid is ejected, the liquid can be atomized as uniform fine particles. Further, a pump 11 serving as a liquid supply unit
When the amount of spraying is reduced by reducing the amount of pressurization in the spray, the ejection speed from the spray nozzle 9 decreases, and the number of particles having a large particle diameter at the outer periphery of the spray increases. Although the amount of evaporation at the outlet increases and the temperature of the inner wall surface decreases,
Thermistor 17 which is a temperature detecting means provided near
By detecting the temperature drop by the temperature control means 18 and controlling the amount of heat generated by the heater 15 by the temperature control means 18 so as to reach the predetermined temperature, the inner wall surface temperature can be kept constant at the predetermined temperature. Particles with a large particle diameter are also heated 1
Since it evaporates on the inner wall surface of 2 and becomes a group of particles having a small particle diameter and is ejected from the ejection port, the liquid can be atomized as uniform fine particles with a variable width of a wide spray amount.

[0013]

As described above, according to the atomizing device of the first aspect of the present invention, among the liquid particles sprayed in an inverted conical shape from the spray nozzle, a group of particles having a small particle diameter at the center is:
The particles with a large particle diameter at the outer periphery of the spray come into contact with the inner wall surface of the heated body heated to a predetermined temperature and evaporate to form particles with a small particle diameter. Therefore, the liquid can be atomized as uniform fine particles with a smaller amount of heat than when the entire amount is vaporized.

According to the second aspect of the present invention, when the amount of spray is reduced by reducing the amount of pressurization of the liquid, the speed of ejection from the spray nozzle is reduced, and the particle group having a large particle diameter at the outer periphery of the spray is reduced. As the temperature increases, the temperature of the inner wall surface decreases.However, it is possible to detect the temperature decrease by the temperature detecting means provided in the vicinity of the ejection port, and to keep the inner wall temperature constant at a predetermined temperature by the temperature control means. Particles with a large particle diameter on the outer periphery of the spray also evaporate on the inner wall surface of the heating body, and are ejected from the ejection port as a group of particles with a small particle diameter. Can be atomized as

[Brief description of the drawings]

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

FIG. 2 is a sectional view of an atomizing device according to another embodiment of the present invention.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 9 spray nozzle 10 liquid passage 11 liquid supply unit 12 heating element 14 ejection port 17 temperature detection means 18 temperature control means

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Uno 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-52-27621 (JP, A) 70513 (JP, U) JP-B-47-44083 (JP, B1) Jikken-sho 17-1497 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05B 1/24 B05B 15 / 04

Claims (2)

(57) [Claims] 1. A spray nozzle for spraying a liquid, a liquid supply unit for supplying a liquid via a liquid passage connected to the spray nozzle, and a heating element provided to surround a downstream side of the spray nozzle. An atomizing device comprising an ejection port smaller than a spray pattern from the spray nozzle formed on the heating body. 2. A spray nozzle for spraying a liquid, a liquid supply unit for supplying the liquid via a liquid passage connected to the spray nozzle, and a heating element provided to surround a downstream side of the spray nozzle. Atomization comprising an ejection port smaller than the spray pattern from the spray nozzle formed on the heating element, a temperature detection means provided near the ejection port, and a temperature control means for controlling the temperature of the heating element. apparatus.