JPS58139757A - Atomizer - Google Patents

Abstract

PURPOSE:To atomize liquid stably with small power consumption without restricted to liquid containing very small dissolved air by connecting an electric vibrator directly to a nozzle plate whose nozzles are facing to a liquid pressurizing chamber along its uneven part. CONSTITUTION:A nozzle plate 9 provided with plural nozzles 7 and a concave part 8a is soldered to a base body 5 having a preessurizing chamber 5 and nozzles are placed to face the chamber 5. A disk-shaped electric vibrator 10 provided with a tapered opening and tapered peripheral part at the center is soldered to the concave part 8a of the plate 9. Liquid, for instance kerosene, is sent from a pipe 11 to the chamber 5 and stored. Excess liquid is taken out from a pipe 12, and AC voltage is supplied to the vibrator 10, and the kerosene is atomixed. At this time, maximum point of vibration acceleration of the vibrator 10 comes close to the nozzles 7. Accordingly, vibration energy that spouts out the kerosene becomes very small. Bubbling phenomenon of dissolved air can be suppressed remarkably, and very stable atomizing operation can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pop device for atomizing liquid fuels such as kerosene and light oil, water, and liquids such as chemicals. This invention relates to an atomization device.

Conventional atomizing pump devices of this type are found in ink atomizing devices used in inkjet recording devices.
This is constructed as shown in FIG. That is, a piezoelectric element 2 is provided at one end of the ink chamber 1, an orifice 3 is provided at the other end, and ink droplets 4 are ejected to atomize the ink.

However, this configuration is extremely convenient for generating a uniform droplet array, and the piezoelectric element 2
has the advantage of extremely low power consumption; however, since the configuration transmits the vibration of the piezoelectric element 2 to the orifice 3 to inject the droplets 4, the amount of dissolved air in the atomized liquid is extremely low. If the dissolved air is not small, there is a disadvantage that the dissolved air cannot maintain a stable atomization operation compared to air bubbles due to the ultrasonic vibration of the piezoelectric element 2. Therefore, ordinary liquid fuel, water, etc. can only be sprayed at extremely low frequencies, and it has been impossible to completely prevent the occurrence of unstable conditions.

That is, although this atomization device has an extremely low power consumption and a compact configuration, it has the disadvantage that it can only atomize liquid with extremely little dissolved air.

The present invention eliminates such conventional drawbacks, and realizes a low-cost atomization device with an extremely simple and compact device configuration, and has an extremely low power consumption, while still allowing atomized particles to be removed. The objective is to realize an atomization device with excellent atomization performance in terms of diameter and particle size distribution.

In order to achieve this object, the present invention has the following configuration.

That is, a base having a pressurized chamber filled with liquid, a nozzle plate adhered to the base so that the nozzle faces the pressurized chamber, and a nozzle plate adhered to the nozzle plate so that the opening faces the nozzle. an electric vibrator, the nozzle plate is provided with a convex flat surface having a diameter equal to or less than the inner diameter of the opening of the electric vibrator, or a concave flat surface having a diameter equal to or greater than the outer diameter of the electric vibrator; The nozzle is configured to be vibrated by an electric vibrator, and with this configuration, the liquid filled in the pressurizing chamber is pressurized or accelerated by the vibration of the nozzle by the electric vibrator. The liquid is self-supplied and injected from the nozzle to atomize it.

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 2, a base body 6 having a pressurizing chamber 5 with a diameter of 10 to 2011 m and a depth of about 2 to 5 mm is attached to a base body 6 with a diameter of 40 to 100 mm.
/7m several nozzles 7, inner diameter 3-5, outer diameter 10
A nozzle plate 9 having a thickness of about 60 μm to 100 μm and having a recess 8 a with a depth of about 0.1 to 0.5 mm is soldered to the nozzle plate 9 so that the nozzle 7 faces the side of the pressurizing chamber. . The nozzle plate 9 has a tapered opening in the center and a tapered outer periphery, and has a thickness of 0.5 to 10 mm in diameter.The kerosene is pressurized from the pipe 11. It is sent to room 5 and stored.

Excess kerosene is taken out from pipe 12.

Lead wires 13 and 14 are electrically connected to electrodes (not shown) provided on both sides of the electric vibrator 1o. That is, the lead wire 13 is soldered to one electrode, the other lead wire 14 is soldered to the nozzle plate 9,
It is connected to the other electrode via the nozzle plate 9.

As mentioned above, kerosene is stored in the pressurizing chamber 6 through the pipe 11, and by applying an AC voltage to the lead wires 13 and 14, AC voltage is supplied to the electric vibrator 1o, and as shown in FIG. Atomized particles 15 are injected from 7.

In the above configuration, since the electric vibrator 10 is directly connected to the nozzle plate 9, the maximum point of vibration acceleration is near the nozzle 7. Therefore, the vibration energy of the reservoir that spouts kerosene from the nozzle 7 is extremely large. becomes small. As a result, the phenomenon of bubbling of dissolved air in kerosene, which occurs at the point of maximum vibration acceleration, as in the prior art, is greatly suppressed, making it possible to achieve extremely stable atomization operation.

When adhering the nozzle plate 9 and the electric vibrator 10, since the nozzle plate 9 is provided with the recess 8a, the position of the nozzle plate 9 and the electric vibrator 1o is easily determined, and workability is good. However, in order to bond three-dimensionally, the peel strength is strong enough to withstand reliable strength. In fact, since the vibrations of the electric vibrator 10 can be transmitted not only to the adhesive surface, the stability of atomization is improved. In addition, the electric vibrator 10
Because at least the side of the opening to be bonded to the nozzle plate 9 is tapered, the adhesion to the nozzle plate 9 is improved during bonding, and the position is easy to determine.

Since the nozzle plate 9 facing the opening of the electric vibrator 10 has a convex portion 8b with respect to the adhesive surface, when soldering, "kg" flows into the nozzle 7 and blocks the nozzle. 1
There's nothing wrong with that.

Further, FIG. 3a shows a nozzle plate according to another embodiment of the present invention.
Shown in b. In FIG. 3a, a convex portion 8b is provided on the nozzle plate 9 only on the opening side of the electric vibrator 1o. FIG. 3 shows only the outer periphery of the electric vibrator 10 and the nozzle plate 9.
A recessed portion 8a is provided in the. In this embodiment as well, the same effects as in the above embodiment can be achieved.

In each of the above embodiments, the recess 8 of the nozzle plate 9
1L or the rising portion of the convex portion 8b is tapered, which is more effective in terms of adhesive strength, the degree of adhesion between the electric/pneumatic vibrator 1o and the nozzle plate 9, and positioning. It is.

As described above, according to the atomization device of the present invention, the following effects can be obtained.

(1) Since the electric vibrator is directly connected to the nozzle plate, the vibration energy of the kerosene ejected from the nozzle is extremely small, and the bubbling phenomenon is greatly suppressed, making it extremely stable. Atomization operation is possible.

(2) If there is a concave or convex part on the nozzle plate,
The position of the electric vibrator is clearly defined, and workability during bonding is excellent.

(3) In the case of a nozzle that has a convex part at the open part of the electric vibrator, the nozzle is a screen from the adhesive surface to prevent the nozzle from clogging with solder during soldering. be able to.

(4) Since it can be bonded three-dimensionally, adhesive strength can be ensured.

(6) Since the nozzle plate is located inside the opening of the electric vibrator, the vibration of the electric vibrator can be transmitted not only to the adhesive surface but also mechanically, improving the stability of atomization.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part of a conventional atomizing device, Fig. 2 is a sectional view of a main part of an embodiment of the atomizing device of the present invention, and Fig. 3 a, b.
FIG. 2 is a side sectional view of a nozzle plate of another embodiment of the atomization device of the present invention. 6...pressure chamber, 6...substrate, 7...
... Nose nope 8a ... recess, 8b ...
- Convex part, 9... group - Nozzle plate, 1° electric vibrator. Name of agent: Patent attorney Toshio Nakao (1st person)
figure! Figure 2

Claims (3)

[Claims] (1) A base body having a pressurized chamber filled with a liquid, a nozzle plate adhered to the base body so that a nozzle faces the pressurized chamber, and a nozzle plate adhered to the nozzle plate so that an opening faces the nozzle. an atomizer, the nozzle plate having a convex portion having a diameter equal to or less than the inner diameter of the electric vibrator, or a concave portion having a diameter equal to or greater than the outer diameter of the electric vibrator. (2) The atomization device according to claim 1, wherein at least the side of the opening of the electric vibrator that is bonded to the nozzle plate is tapered. (3) The atomization device according to claim 1, wherein at least the outer diameter portion of the electric vibrator is tapered on the side that is bonded to the nozzle plate.