JPH029914Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention relates to a liquid atomization device that atomizes various liquids including liquid fuel by using vibrations of an electric vibrator such as a piezoelectric element. be.

Structure of conventional example and its problems As shown in FIG. 1, a conventional ultrasonic atomizer of this type has a base 1 provided with a pressurizing chamber 3 filled with liquid, an exhaust port 2, and a supply port 7. A nozzle plate 5 having one or more nozzles 4 and an electric vibrator 6 are mounted in the pressurizing chamber 3. With such a configuration, the device requires a means for filling the pressurized chamber 3 with liquid when it is deployed into the device, and the following devices have been used, but each has various problems. Ta.

(1) As shown in FIG. 2, the supply port 7 and exhaust port 2 attached to the pressurizing chamber 3 are connected to the liquid tank chamber 13 via supply/discharge paths 14 and 16 and a pump 15. be. The operation of the pump 15 causes the pressurized chamber 3 to be filled with liquid and circulated. Therefore, the liquid in the pressurizing chamber 3 flows while pulsating or vibrating. at the same time,
The liquid near the nozzle plate 5 also flows and moves. As a result, the local pressurization state of the liquid in the pressurizing chamber 3 due to the vibration of the nozzle plate 5 is disturbed, which has a significant effect such as deterioration of the atomization characteristics (particularly the flow rate, dispersion, etc.).

(2) As shown in FIG. 3, the exhaust port 2 attached to the pressurizing chamber 3 is connected to the suction side of the fan 21 to utilize suction force (negative pressure).

The rotation of the fan 21 produces a suction effect, thereby filling the pressurizing chamber 3 with liquid from the supply port 7 . At this time, a leveler 9 is required to maintain the positional relationship between the nozzle 4 position and the liquid level in order to maintain the atomization characteristics and function, and also the diameter of the supply port 7 and the path length from the liquid leveler 9. Since the resistance in the path changes depending on the diameter, fan 2
1, it is not easy to set the suction force, and a dedicated fan 21 for filling the pressurizing chamber 3 with liquid is also required.

Purpose of the invention The present invention is intended to solve these conventional problems. (1) To quickly and easily fill the pressurized chamber with liquid. Also, it is easy to remove air from the system.

(2) The position of the liquid level in the pressurized chamber can be set reliably and easily, furthermore, changes in the flow of the liquid into the pressurized chamber can be alleviated as much as possible, and at the same time, the propagation of pulsations and vibrations in the liquid can be suppressed as much as possible.

The purpose is to

Structure of the Invention In order to achieve this object, the present invention provides a constant liquid level chamber communicating with a pressurizing chamber, and also provides a pressure regulating hole in the constant liquid level chamber.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 4, an exhaust port 2 is provided at one end of the base 1.
A pressurizing chamber 3 is provided, and the pressurizing chamber 3
A nozzle plate 5 having one or a plurality of nozzles 4 and an electric vibrator 6 are sequentially mounted substantially concentrically on the holder. Further, a constant liquid level chamber 9 having a supply port 7 and a return port 8 is provided on the other side of the base body 1, separated from the pressurizing chamber 3 by a wall, and the two are communicated with each other through a communication hole 10. and the constant liquid level chamber 9
A pressure regulating hole 11 is provided above the pressure regulating hole 11, and a pressure regulating orifice 12 is provided in the communication hole 10, respectively. The supply port 7 and the liquid tank chamber 13 are connected via a supply pipe 14 and a supply pump 15. The return port 8 is located above the constant liquid level chamber 9, has a slope inside, and is connected to the liquid tank chamber 13 via a return pipe 16. The electric vibrator 6 is connected to a driving power source (not shown) through lead wires 17 and 18. Further, the base body 1 is held by a bench lily 19 that wraps the outer circumference of the base body 1 at regular intervals by a support (not shown) attached to the base body 1. At the same time, the exhaust port 2 is connected to the throat portion 20 of the bench lily 19.
The pressure regulating holes 11 are provided so as to be adjacent to each other on the upstream side of the gas. The bench lily 19 communicates with a gas supply source such as a blower fan (not shown).

In the above configuration, gas is first supplied from a gas supply source such as a blower fan (not shown) and passes through the bench lily 19 . At this time, the gas converts a portion of the static pressure into a flow velocity at the throat portion 20, making it much lower than the static pressure on the upstream side. Subsequently, the supply pump 15 is energized to supply the liquid from the liquid tank chamber 13 to the constant liquid level chamber 9, and at the same time, it is also supplied to the pressurizing chamber 3 through the communication hole 10. At this time, the gas whose static pressure has increased before being converted to a flow rate flows into the constant liquid level chamber 9 from the pressure regulating hole 11, pressurizes the liquid level in the constant liquid level chamber 9, and transfers the liquid to the pressurizing chamber 3. At the same time, the ejector effect works by sucking the liquid from the exhaust port 2 of the adjacent base 1 due to the gas whose static pressure has decreased after passing through the throat part 20, and the liquid flows into the pressurizing chamber 3 more quickly. Try to fill with liquid. Then pressurize chamber 3 at a certain height (head).
Continue to maintain the liquid level inside. Blower fan (not shown)
Alternatively, after a certain period of time after the supply pump 15 is energized,
Or after detecting liquid etc. overflowing from the return port 8,
Drive voltage and the like are input from the control section to the electric vibrator 6 through lead wires 17 and 18 in accordance with the amount of atomization.

As a result, the electric vibrator 6 generates expansion and contraction movements in the diametrical direction, and at the same time, the adjacent and attached nozzle plate 5 is excited by bending vibration. Then, the liquid in the pressurizing chamber 3 is locally pressurized, and the liquid is atomized and sprayed from the nozzle 4. During this time, nozzle plate 5
The dissolved gas in the liquid in the pressurizing chamber 3 becomes bubbles due to the cavitation phenomenon due to the ultrasonic vibrations of the bubbles, which are either discharged from the nozzle 4 which is the part of maximum excitation, or coalesce to form large bubbles. It is then discharged to the outside from the exhaust port 2. Therefore, compressible gas (dissolved gas) is always discharged from the pressurizing chamber 3, and the liquid is continuously discharged from the constant liquid level chamber 9 in the same substrate 1 into the pressurizing chamber 3 by suppressing the propagation of pulsations and vibrations. The liquid is supplied as a smooth flow to the liquid, and at the same time is maintained at a constant liquid level. Then, the nozzle plate 5 is maintained in a stable vibrating state, and an atomization device with excellent atomization characteristics and a stable atomization amount variable can be obtained. Also, cooling and heating effects can be obtained by circulating the liquid.

Effects of the invention As described above, the liquid atomization device of the invention provides the following effects.

In other words, since the pressure regulating hole is provided in the constant liquid level chamber, the liquid level in the constant liquid level chamber is pressurized at a constant pressure, liquid level fluctuations are suppressed, and a smoother flow is supplied to the pressurizing chamber. A stable atomization device is obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of a conventional atomization device;
FIGS. 2 and 3 are cross-sectional views showing the configuration of a conventional atomizing device system when the device is deployed, and FIG. 4 is a cross-sectional view of a liquid atomizing device showing an embodiment of the present invention. 1... Base body, 2... Exhaust port, 3... Pressurized chamber, 4
... Nozzle, 5 ... Nozzle plate, 6 ... Electric vibrator, 7 ... Supply port, 8 ... Constant liquid level chamber, 10 ... Communication hole, 11 ... Pressure regulation hole, 12 ... Pressure regulation Orifice, 15... Supply pump, 19... Bench lily,
20... Throat part.

Claims (1)

[Claims for Utility Model Registration] (1) A nozzle plate having a nozzle and an electric vibrator are attached to a pressurized chamber filled with liquid, a constant liquid level chamber communicating with the pressurized chamber is provided, and this constant liquid level chamber is provided in communication with the pressurized chamber. A liquid atomization device in which a pressure regulating hole is provided in a liquid level chamber and a supply pump is provided in the middle of a supply pipe connecting this constant liquid level chamber and a liquid tank chamber. (2) The liquid atomization device according to claim 1, wherein a pressure regulating orifice is provided in a part of the communication portion that communicates the pressurized chamber and the constant liquid level chamber. (3) The pressurized chamber is provided with an exhaust port, the exhaust port is provided in the vicinity of the throat of the bench lily component on the gas passage, and a pressure regulating hole is provided in the upstream portion of the exhaust port, which is the scope of claim 1 for registration of a utility model. The liquid atomization device described in Section 1.