JPS6168158A - Ultrasonic atomizer - Google Patents

Abstract

PURPOSE:To treat the comparatively deep or shallow part of an airway, for example, with one device when the device is used as an inspirator by obtaining atomized particles having different particle size with one device. CONSTITUTION:In a phone vibrator 11, an ultrasonic vibrator 14 is furnished t one end and an atomizing part 16 is combined with the other end into a body. Two regions 17 and 18 having different distances from the center to the edge are formed on the surface of the atomizing part 16. Besides, the ultrasonic vibrator 14 is driven by an oscillating circuit which can be oscillated by the changeover of two different frequencies, and atomization is carried out with different frequencies. With high-frequency oscillation, for example, the region 17 of the atomizing part 16 is vibrated, and the liquid in the vicinity of the region 17 is atomized. Besides, with low-frequency oscillation, the region 18 of the atomizing part 16 is vibrated, and the liquid in the vicinity of the region 18 is atomized. Consequently, atomized particles having different particle diameter can be obtained with one device.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an ultrasonic atomizer used for humidifying the upper respiratory tract, inhalation, etc.

(b) Conventional technology Ultrasonic atomizers are equipped with a horn with an ultrasonic vibrator installed at the bottom. Liquid is injected from a bottle into the atomizing section at the tip of this horn, and the ultrasonic vibrator causes There is something that drives the liquid. A conventional conical horn used in this type of ultrasonic atomizer is shown in FIG. This conical horn 1
The main body 2 is a conical rigid metal body, an ultrasonic vibrator 4 is attached to the large diameter part 3, and a circular diaphragm 6 for atomization is integrally formed in the small diameter part 5. . When the ultrasonic vibrator 4 is driven by an oscillation circuit not shown, the vibration is transmitted through the main body 2, magnified, and applied to the diaphragm 6.
Atomization takes place.

(c) Problems to be Solved by the Invention The atomized particle size of the medicinal solution inhaled into the upper respiratory tract that produces a therapeutic effect differs depending on the affected area, symptoms, etc. Therefore, it is desirable to inhale the atomized particle size according to the affected area and symptoms. but,
The diaphragm of the horn of the conventional ultrasonic atomizer is circular and has only a single resonant frequency, making it possible to atomize only at one frequency. Therefore, in order to change the atomized particle size, there was a problem in that a plurality of ultrasonic atomizers having different resonance frequencies had to be prepared.

An object of the present invention is to provide an ultrasonic atomizer that can atomize different atomized particle sizes with one device.

(d) Means and operation for solving the problems The ultrasonic atomizer of the present invention includes an ultrasonic vibrator, the ultrasonic vibrator is attached to one end, and the atomizing part is integrally attached to the other end. A horn vibrating body is provided, and two areas having different distances from the center to the edge are formed on the surface of the atomizing part;
The ultrasonic transducer is configured to include an oscillation circuit that can oscillate by switching the frequency, the oscillation circuit drives the ultrasonic transducer, and the oscillation frequency is switched to produce atomization at different resonance frequencies.

In other words, in this ultrasonic atomizer, the oscillation circuit oscillates at one frequency, and when the ultrasonic vibrator is driven, one of the atomization sections at a different distance from the center to the edge corresponds to this frequency. Only the region resonates and vibrates, producing an atomizing effect in that region, and when the oscillation circuit is switched to another frequency, the other region of the atomizing section resonates in response, producing atomization in that region. oxidation is carried out. Since the resonance frequencies of the two regions of the atomization section are different, atomization of different particle sizes is performed in the two regions.

(E) Examples The present invention will be explained in more detail with reference to Examples below.

FIG. 1 shows a horn and a liquid supply section of an ultrasonic inhaler according to an embodiment of the present invention. In the same figure, the horn (vibrating body)
11 is a conical type, but the diaphragm (atomization part) 16 provided integrally with the main body 12 at the radial end 15 is
It differs from the one in Figure 3 in that a part of the circle is cut out. The distance from the center to the edge of this diaphragm 16 is different between the notch part 17 and the non-notch part 18, and the notch part 17,
The non-cut portion 18 forms two regions having different resonance frequencies.

A bottle 19 is provided below the diaphragm 16, and the liquid 20 stored in the bottle 19 is supplied to the notch 17 and the non-notch portion 18 of the diaphragm 16 through a water absorption band 21. ing.

FIG. 2 shows the ultrasonic vibrator 14 of the ultrasonic inhaler according to the above embodiment.
22 is an oscillation circuit for driving the ultrasonic transducer 14, and this oscillation circuit 22 has a voltage of a battery 23 boosted by a DC-DC converter 24,
It is added as a power supply voltage.

The oscillation circuit 22 is a well-known blocking oscillator consisting of a transistor T r % F transformer Tl (T2), a capacitor C1, a resistor R, etc.
2 by a switch 25. In other words, depending on whether the switch 25 is turned to the a side or the b side,
The transformer of the oscillation circuit 22 is switched to either T1 or T2, and the oscillation circuit 22 oscillates at different frequencies. Each oscillation frequency caused by switching is designed to correspond to the resonance frequency of the cutout portion 17 and the non-cutout portion 18 of the diaphragm 16 described above.

In this ultrasonic inhaler, when the switch 25 is now turned on to the a side, that is, the transformer Tl side, and the power is turned on to oscillate at a high frequency, for example, the ultrasonic vibrator 14 vibrates at this frequency, and the ultrasonic wave is transmitted through the main body 12 of the horn 11, causing the notch 17 of the diaphragm 16 to vibrate. Then, the liquid present near the notch 17 is atomized.

On the other hand, switch 25 is set to b side, that is, transformer Tl
When connected to the side, transformer T2 is connected and oscillation circuit 2
2 oscillates. If this oscillation frequency is set to be lower than when connected to the transformer Tl side, the ultrasonic vibrator 14 vibrates at a lower frequency than when the switch 25 is turned on to the transformer Tl side. In response to this, the non-notched portion 18 of the diaphragm 16 now vibrates. The liquid present near the non-cut portion 18 is atomized.

Since the resonant frequencies of the cutout portion 17 and the non-cutout portion 18 are different, different particle sizes of the atomized liquid can be obtained.

In the above embodiments, a conical type horn is used as an example, but the present invention can be practiced using other types of horns such as a step horn.

In addition, in the above embodiment, the diaphragm has a circular part cut out to form two areas with different resonance frequencies, but the atomization part is made into a rectangle with long sides and short sides, and the diaphragm has two areas with different resonance frequencies. Two regions may be formed.

Furthermore, in the above embodiment, the liquid is supplied to the atomizing section using a water absorption band, but it may be supplied using other means such as a water supply nozzle.

(F) Effects of the Invention According to the ultrasonic atomizer of this invention, atomization with different particle sizes can be achieved by switching, so when used as an inhaler,
For example, a single device can treat relatively deep and shallow parts of the airway.

[Brief explanation of the drawing]

Fig. 1 shows the horn and liquid supply section of an ultrasonic inhaler according to one embodiment of the present invention, Fig. 1(a) is a plan view of the horn, and Fig. 1(b) shows the horn and the liquid supply section. A schematic diagram showing the coupling, Fig. 2 is a circuit diagram showing an oscillation circuit for driving the ultrasonic vibrator of the ultrasonic inhaler, and Fig. 3 shows a horn used in a conventional ultrasonic inhaler. FIG. 3(a) is a plan view of the same horn, and FIG. 3(b) is a front view of the same horn. 11: horn, 14: ultrasonic vibrator, 16: diaphragm, 17: cutout, 18: non-cutout, 22: oscillation circuit, 25: changeover switch patent applicant Tateishi Electric Co., Ltd. agent
Patent Attorney Shigeru Nakamura Figure 3 (a) (shi)

Claims (1)

[Claims] (1) An ultrasonic vibrator; one end of the ultrasonic vibrator is attached, and the other end is integrally provided with an atomizing section, and the surface of the atomizing section has different distances from the center to the edge. It includes a horn vibrating body formed with two regions and an oscillation circuit capable of oscillating by switching between two different frequencies, the oscillation circuit drives the ultrasonic transducer, and by switching the frequency of the oscillation circuit, different resonances can be generated. An ultrasonic atomizer that atomizes at frequencies.