JPS5932973A - atomization device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention atomizes liquid fuel such as 'J, 1 oil and light oil, water, chemical solution, recording liquid, etc. using an electric vibrator. The present invention relates to a liquid atomization device.

Five conventional configurations and -i' problems Conventionally, liquid atomizers (V1' and 2'C Gods (
-) have been proposed, and the sweat electron element J' Yuki no Ichi, the air germane II
+! ] Since there are many cases where I′ is +14, I′L
Ru. For example, the Gonkgenoto recording device emits the vibrational energy of the train 1' in a predetermined shape into the JJT group room and injects it from a nozzle hole provided at the tip. is always filled with ink, which is a liquid for ejecting. At the end of recording axis A'1',
The ink in the pressurized chamber is prevented from drying by covering the nozzle section or maintaining the nozzle section at a saturated vapor pressure state of water. If the ink dries and solidifies, and the nozzle hole from which it is ejected breaks, it may become unusable for the first use, or a great deal of power may be required to remove the solid material at the beginning of ejection. was.

OBJECTS OF THE INVENTION The present invention eliminates the complicated liquid drying prevention means of conventional atomizing devices, has a simple configuration, and provides a mist system that reliably removes residual liquid from the nozzle. The purpose is to provide a

Structure of the Invention To achieve this object, the atomizing device of the present invention comprises: a pressurizing chamber filled with a liquid; a supply means for supplying the liquid for atomization into the pressurizing chamber; and a supply means facing the pressurizing chamber. A nozzle part having a nozzle provided as shown in FIG. and a control section that applies a predetermined drive signal to the vibrator.

With this configuration, when the liquid supply to the pressurized chamber is stopped at the end of the use of the atomization device, the electric vibrator is vibrated with a predetermined drive signal to eliminate residual liquid in the pressurized chamber or at least Residual liquid adhering to the nozzle part can be removed. Nozzle vibration when the liquid is not filled,
In other words, it vibrates for a predetermined period of time in a state close to dry firing.

Any remaining liquid will scatter and will not remain in the nozzle.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be explained below by referring to FIG. 1 at 7-rl.
＼6゜This figure is a sectional view showing the configuration of an oil hot air fan to which the atomization device of this embodiment is applied.

A driving operation section 2 is provided on the top surface of a case 1 of the warm air fan, and operation signals are sent to a control section 3 that performs noise control, electric vibrator drive control, and the like. The blower motor 4 is started by the control section 3 which receives the operation start signal. A blower fan 5 that supplies combustion air and a suction fan 5 that generates negative pressure, which will be described later, are coaxially connected to the blower motor 4.

Combustion air is sucked in by the rotation of the aforementioned blower fan 6 [
It enters the air from the 1st stage, passes through the orifice part 8, and is fed into the atomization chamber 9 and secondary air chamber 10 as shown by the arrows, and then flows into the combustion chamber 1.
1. It passes through the exhaust stack 12 and is emitted as exhaust gas.

On the other hand, the kerosene fuel stored in the tank 13 is sent to a leveler 14 that controls the liquid level to a substantially constant height A. When the operation is stopped, the liquid level in the fuel supply pipe 16 of the atomizing section 16-\ is also controlled to the same height B as the person in the figure. However,
When the blower motor 4 starts rotating at the start of operation, the blower fan 50
Due to the rotation, a negative pressure (e.g. -Pl = -10 mmAq) is generated on the downstream side 17 of the orifice 8, and the rotation of the suction fan also creates a negative pressure difference (e.g. = -P2-30111mAq)
occurs. Since this high pressure side 18 is connected to the downstream side of the orifice, the negative pressure side 19 is the sum (-
P5= -Pl-1-(-P2) z-4ommAq)
The low pressure side 19 is a pipe 20, which is connected to the atomizing section 15 described above.
Since it is connected to
The operation of c3 or higher is performed during the blowing/combing period of the blower fan 5, and the atomizing section 15 completes preparation for the atomizing operation during this period. , the liquid fuel is filled.Next, the control section 3 activates the igniter 21 and energizes the atomization section 16 to eject atomized particles 22 into the atomization chamber 9.Atomization The atomized particles are ignited and ζ
The flame 24 instantly performs ignition and combustion by a blower, mixes with secondary air, and forms a flame-holding flame 24 at the tip of the combustion tube 23.
Sustains combustion. 26 is a flame rod of a flame detection element, which monitors ignition, misfire, and combustion status. 26 is a convection fan that sends out hot Jt.

Next, the atomizing section 16, which is an embodiment of the present invention, will be explained in more detail with reference to the cross-sectional view of FIG.

The parts shown in Figure 1 and numbered are equivalents having the same function. The body 2 is fixed to the wall 28 of the atomization chamber with screws 29. A 5-cylindrical pressurizing chamber 30 is formed in the body 27, and is passed through the aforementioned fuel supply valve 16 and a gas exhaust screen.31 is the pressurizing chamber 3Q. The nozzle part is arranged facing one side, and the outer periphery is joined to the body 27.In the center of the nozzle part 31, there is a spherical projection 3 having a fine hole for ejecting droplets d1.
2 power; J is composed.

Furthermore, an annular electric vibrator, here a piezoelectric element 33, is attached to the nozzle portion 31. This piezoelectric element 33
is an electric ceramic which has been polarized in the thickness direction and has an electrode surface on the joint surface with the nozzle and on the opposite surface. 34 is a lead wire for transmitting a drive signal to the piezoelectric element 33, which is soldered to one side of the piezoelectric element 33, and the other side is connected to the body 27 with a screw 36. When the mechanical vibration of the piezoelectric element 33 is excited by the drive signal, the nozzle part 31 is also energized and vibrates, so that the liquid in the pressurizing chamber 30 is ejected as atomized particles 22 as a result.

In FIG. 1, the supply means for supplying liquid to the pressurized chamber include the use of negative pressure by a suction fan 6, etc., and the self-sufficient pump action of the atomization section 16. When the rotation of the blower motor 4 is stopped by the operation stop signal, the fuel supply to the pressurizing chamber 30 is stopped. Due to this rotation stop, the fuel level drops to the above-mentioned level B. At this time, the remaining droplets remain attached to the nozzle portion 31. In particular, the liquid accumulated in the tiny ejection holes does not flow down in one direction. Therefore, if the nozzle part 31 is vibrated after the fuel supply is stopped, the remaining liquid droplets adhering to the surface of the nozzle part 31 will be scattered by the vibration power, and all the adhering liquid can be removed after excitation for a predetermined time. .

Next, FIG. 3 shows an example of a method for driving the electric vibrator 33 of the present invention. The oscillation signal of the oscillator 36 is applied to the electric vibrator 33 via the amplifier 37.

Mechanical vibrations are excited. As described above, the nozzle section 31 is vibrated by the mechanical vibration energy of the electric vibrator 33, and as a result, the liquid fuel is atomized into fine particles.

The power adjustment signal from the regulator 38 is applied to the aforementioned amplifier 37, and the power applied to the electric vibrator 33 is controlled to a predetermined value. Reference numeral 39 indicates a control section including the oscillator, amplifier, regulator, etc. described above.

FIG. 4 shows the level change of the driving power after the fuel supply is stopped, and A is the liquid supply signal, that is, in the embodiment of FIG. 1
You can see that the signal is stopped with +. B shows a temporal change in the driving power applied to the electric vibrator 33. 1. When a person generates a 4 rotation stop signal for the blower motor. It can be seen that the drive power is set to a predetermined level at =1+ and is applied until t=t2 when a predetermined time has elapsed. t,=U
The reason why the power is set low to a predetermined value with + is that the atomizing unit 16 is in a state close to dry firing, so the impedance is small, especially as a vibration system that uses the resonance point of the electric vibrator 33. . In order to prevent the element from being destroyed in this state, a power lower than that during normal driving is applied.

In the embodiment of the present invention, the driving power application and adjustment means to the electric vibration j'33 are shown in FIG. Various methods such as voltage control, current control, and duty control can be considered for power adjustment.

Effects of the Invention According to the atomization device of the present invention, when the liquid supply to the atomization section is stopped, a drive signal set to a predetermined power is applied to the electric vibrator to vibrate the nozzle. At least the residual liquid adhering to the nozzle surface is scattered, and u1 is completely removed at the nozzle hole. In particular, in the fuel kerosene of the above example, it is extremely easy to prevent the tar components in the oil and the contained dirt from drying on the nozzle surface and adhering as solid matter when not in use for a long period of time. This has the effect of being able to be prevented through configuration.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the configuration of an oil hot air fan to which an atomizing device according to an embodiment of the present invention is applied, FIG. 2 is a cross-sectional view of an atomizing section showing an embodiment of the present invention, and FIG. Figures 4A and 4B are diagrams showing temporal changes in the liquid supply signal and the electric vibrator driving power. 4.5.6.20...Liquid supply means, 3Q.
... Pressure chamber, 31 ... Nozzle part, 33 ...
...Electric vibrator, 39...Control unit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4

Claims (2)

[Claims] (1) A pressurized chamber in which the liquid is charged and the pressurized chamber 11-
'-Supplying liquid 6 to I--(supplying means shown in
, a nozzle part provided facing the chamber/having this nozzle;
1j An electric vibrator that vibrates the nozzle by energizing the nozzle part (-1), and a predetermined drive signal is applied to the electric vibration 1' for a predetermined period of time even after the liquid supply to the pressurizing chamber is stopped. An atomizing device consisting of a control section that applies (2) The atomization device according to claim 1, wherein the predetermined drive signal it of the electric vibrator after stopping the liquid supply is set to a power that is lower by a predetermined value than the maximum applied power during steady drive. .