JP2016185506A - Ultrasonic atomization device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase an atomization amount of an ultrasonic atomization device.SOLUTION: An ultrasonic atomization device 1 includes: a container 10 for storing a liquid 2 for atomization; an ultrasonic transducer 11 disposed in the liquid 2 in the container 10; and an air supply mechanism which supplies air to a vibration area 5 formed by the ultrasonic transducer 11. The air, which is supplied to the vibration area 5 formed by the ultrasonic transducer 11 in the liquid 2 stored in the container 10 by the air supply mechanism, becomes air bubbles 6 in the liquid 2 to move up in the vibration area 5. The air bubbles 6, which move up in the vibration area 5, burst at a tip part of a liquid column 3 to increase scattering of droplets 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ultrasonic atomizer that atomizes a liquid by ultrasonic vibration.

  As an apparatus for generating (atomizing) fine droplets from a liquid, an ultrasonic atomizing apparatus using an ultrasonic vibrator is known. In this ultrasonic atomizing device, an ultrasonic vibrator is arranged at the bottom of a container storing an atomizing liquid. When the ultrasonic vibrator vibrates, the liquid microparticles vibrate in the direction of ultrasonic propagation in the liquid, the vibration energy concentrates on the liquid surface, the liquid column stands, the tip of the liquid column breaks, and the liquid microparticles Fog is generated by scattering.

  In such an ultrasonic atomizer, various improvements for increasing the atomization amount (atomization amount per unit time) are performed. For example, in Patent Document 1, in order to improve the vibration efficiency of the ultrasonic vibrator and increase the amount of atomization, the pressurized liquid is sprayed from the pressurized liquid supply device to the vibration surface of the ultrasonic vibrator, There is disclosed a technique for removing bubbles and dirt that are generated when a sound wave vibrator is driven and adhere to a contact surface between the ultrasonic wave vibrator and a liquid.

JP 2008-264705 A (paragraph [0006])

  In the development of an ultrasonic atomizer, in order to stabilize and increase the amount of atomization, the countermeasures disclosed in Patent Document 1 etc. are used, and the vibration surface area of the ultrasonic vibrator is increased to increase vibration energy. Various measures such as widening are being studied.

  However, the former measure is effective for maintaining the capability originally possessed by the ultrasonic atomizer, but does not increase the amount of atomization. Of course, the latter measure cannot obtain an atomization amount exceeding the capability of the mounted ultrasonic transducer. That is, none of these measures contributes to raising the amount of atomization exceeding the capability of the ultrasonic vibrator mounted on the ultrasonic atomizer.

  In view of the circumstances as described above, an object of the present invention is to provide an ultrasonic atomizer that can increase the amount of atomization.

  In order to achieve the above object, an ultrasonic atomization apparatus according to an aspect of the present invention includes a container that stores a liquid for atomization, an ultrasonic vibrator that is disposed so as to contact the liquid in the container, An air supply mechanism for supplying air into the liquid.

  According to this ultrasonic atomizer, air is supplied to the liquid stored in the container by the air supply mechanism. A part of the air supplied into the liquid is released out of the liquid as bubbles, but a part of the air is dissolved in the liquid, increasing the amount of dissolved air in the liquid. By applying vibration to the liquid by the ultrasonic vibrator, a large amount of air, that is, a large amount of microbubbles, is generated in the liquid column formed by the ultrasonic vibration, and ruptures at the tip of the liquid column. To increase droplet splashing. Thereby, the atomization amount of an ultrasonic atomizer can be increased.

  In the ultrasonic atomizer according to the present invention, the air supply mechanism may supply air to a vibration region formed by the ultrasonic transducer.

  According to this ultrasonic atomizer, air is supplied by the air supply mechanism to the vibration region formed by the ultrasonic vibrator in the liquid stored in the container. The air supplied to the vibration area partially dissolves in the liquid, and part of the air rises as a bubble in the liquid and rises in the vibration area. The bubbles that have risen in the vibration area burst at the tip of the liquid column. Increase droplet splashing. Thereby, the atomization amount of an ultrasonic atomizer can be increased.

  In the ultrasonic atomization apparatus according to the present invention, the air supply mechanism may include an air generation source and an air introduction unit that introduces the air of the air generation source into the vibration region.

In the ultrasonic atomization apparatus according to the present invention, the ultrasonic transducer is disposed at a bottom portion of the container, and the air introduction unit introduces the air from a side surface of the vibration region toward the vibration region. It may be configured.
Thereby, the presence of the air introduction part does not hinder the propagation of vibration in the vibration region, and air can be introduced into the vibration region without any unevenness, thereby increasing the amount of atomization.

In the ultrasonic atomizing apparatus according to the present invention, the air introduction part may be annular or cylindrical.
Thereby, air can be uniformly introduced into the vibration region, and the amount of atomization can be increased.

The air introduction portion has a cylindrical shape, and the end portion on the gas-liquid interface side of the cylindrical air introduction portion is displaced in the horizontal direction with respect to the end portion on the ultrasonic transducer side of the cylindrical air introduction portion. It may be opened at a different position.
According to the configuration of the air introduction unit, the ultrasonic wave propagates in a direction inclined with respect to the direction of gravity, and the liquid column is inclined in the direction of the inclination. By tilting the liquid column, when the liquid that has reached the top of the liquid column falls to the liquid surface due to gravity, the liquid falls on one side of the liquid column. Can be reduced, and the amount of atomization increases.

The ultrasonic atomizing device according to the present invention is disposed so as to surround a side surface of the vibration region, and guides the bubbles generated in the vibration region by introducing the air into the vibration region toward a gas-liquid interface. A guide member that forms a guide space may be further provided.
The ultrasonic wave propagating by vibrating the liquid fine particles by the vibration of the ultrasonic vibrator is suppressed from being diffused by the guide member arranged so as to surround the side surface of the vibration region, and is reflected in the guide member, Bubbles concentrated in the orthogonal direction (vibration direction) of the vibration surface of the ultrasonic vibrator, giving stronger vibration energy to the gas-liquid boundary surface, and bubbles generated in the vibration region by introducing air into the vibration region by the air introduction part Most of them can be collected at the gas-liquid interface in the vibration region by the guide member, and the amount of atomization can be increased.

The guide member may be a cylindrical guide member whose tube diameter decreases as it approaches the gas-liquid interface of the liquid.
When the ultrasonic waves generated from the ultrasonic transducer are reflected and converged on the inner peripheral side surface of the guide member with a gradually decreasing tube diameter, the vibration energy is concentrated more strongly and the amount of atomization can be increased.

  The air introduction part may have an air discharge part made of a porous member.

  The ultrasonic vibrator is held in a through-hole provided at the bottom of the container via a packing material, and the packing material has one end opened in the container and the other end communicated with the air generation source. The air circulation holes may be provided. As a result, it is not necessary to hang a tube from the air pump from above in the container, and air can be directly introduced into the vibration region.

  As described above, according to the ultrasonic atomizer of the present invention, the atomization amount can be increased.

It is side surface sectional drawing which shows the structure of the ultrasonic atomizer 1 of 1st Embodiment which concerns on this invention. It is side surface sectional drawing which shows the structure of 1 A of ultrasonic atomizers of 2nd Embodiment which concerns on this invention. It is side surface sectional drawing which shows the structure of the ultrasonic atomizer 1B of 3rd Embodiment which concerns on this invention. It is side surface sectional drawing which shows the structure of 1 C of ultrasonic atomizers of 4th Embodiment which concerns on this invention. FIG. 6 is a plan view of the annular air introduction portion 16 </ b> C of FIG. 4. It is side surface sectional drawing which shows the structure of ultrasonic atomizer 1D of 5th Embodiment which concerns on this invention. It is side surface sectional drawing which shows the structure of the ultrasonic atomizer 1E of 6th Embodiment which concerns on this invention. It is side surface sectional drawing which shows the structure of the ultrasonic atomizer 1F of 7th Embodiment which concerns on this invention. It is AA 'sectional drawing of the guide member 24 of FIG. It is side surface sectional drawing which shows the structure of the ultrasonic atomizer 1G of 8th Embodiment which concerns on this invention. It is side surface sectional drawing which shows the modification of the ultrasonic atomizer 1G of 8th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a side sectional view showing a configuration of an ultrasonic atomizer 1 according to a first embodiment of the present invention.

  As shown in FIG. 1, the ultrasonic atomizer 1 includes a container 10 that stores an atomizing liquid 2. The atomizing liquid 2 may be, for example, tap water. Further, the ultrasonic atomizer 1 has an ultrasonic transducer 11. The ultrasonic transducer 11 is arranged so that the vibration surface touches the liquid 2 in the container 10. In this embodiment, the ultrasonic transducer | vibrator 11 is arrange | positioned in the bottom part of the container 10 directly or through packing etc. which are not shown in figure.

  The ultrasonic vibrator 11 includes, for example, a vibrator such as a piezoelectric ceramic and electrode layers provided on both side surfaces of the vibrator. A high frequency voltage generated from the DC power supply 13 by the drive circuit 12 is applied between the electrode layers.

  When the ultrasonic vibrator 11 vibrates due to the application of a high frequency voltage from the drive circuit 12, the liquid fine particles vibrate in the ultrasonic wave propagation direction, which is a direction orthogonal to the vibration surface of the ultrasonic vibrator 11. , Vibration energy concentrates on the gas-liquid boundary surface, the liquid column 3 stands, the tip of the liquid column 3 whose surface tension is greatly reduced breaks, and finely pulverized liquid fine particles (hereinafter referred to as “droplet 4”). Called). These scattered liquid droplets 4 become mist and are discharged to the outside through a spray port 14 provided in the upper part of the container 10.

  Here, a region where the liquid microparticles vibrate in the ultrasonic propagation direction due to the vibration of the ultrasonic transducer 11 is referred to as a “vibration region 5”. In FIG. 1, a region indicated by a dotted line is a vibration region 5. The ultrasonic wave propagates as a pressure wave in the liquid.

  The ultrasonic atomizer 1 of this embodiment includes an air supply mechanism that supplies air to the vibration region 5. The air supply mechanism connects the air pump 15 that is an air generation source, the air introduction unit 16 that introduces the air generated by the air pump 15 into the vibration region 5 in the liquid, and the air pump 15 and the air introduction unit 16. And the tube 17.

  The air introduction part 16 may have a porous material such as an air stone that can introduce air into the liquid 2 as fine bubbles 6 as an air discharge part. As the porous material, a material excellent in corrosion resistance, such as porous ceramics, is used.

  In the ultrasonic atomizer 1 of the present embodiment, for example, a plate-like air introduction unit 16 that generates bubbles from at least one main surface in the liquid 2 is employed. The plate-like air introduction part 16 is arranged in a posture in which one main surface is opposed to the side surface of the vibration region 5 so that air can be introduced into the vibration region 5 from the side surface. Further, in the height position, the air introduction part 16 may be disposed at a position spaced upward from the height of the vibration surface of the ultrasonic transducer 11.

  Note that the plate-like air introduction portion 16 may be configured to generate bubbles only from one main surface facing the side surface of the vibration region 5.

  Thus, the air supplied to the vibration region 5 by the air supply mechanism becomes bubbles 6 in the liquid 2 and rises in the vibration region 5. The bubbles 6 that have risen in the vibration region 5 are ruptured at the tip of the liquid column 3 to increase the scattering of the droplets 4. Thereby, the atomization amount of the ultrasonic atomizer 1 can be increased.

  Further, as the air supply mechanism introduces air into the vibration region 5, an upward air flow is generated from the lower side of the liquid column 3 to the upper side. It can be released to the outside. Furthermore, this ascending air current can reduce a part of the droplets 4 scattered from the tip of the liquid column 3 from entering the liquid surface and returning to the liquid phase.

  Furthermore, in the ultrasonic atomizer 1 of this embodiment, since air is directly introduced into the liquid 2 by the air supply mechanism, the amount of dissolved air in the liquid 2 can be increased. The dissolved air in the liquid 2 is indispensable for generating an atomization phenomenon, and the amount of atomization can be increased by optimizing the amount of dissolved air in the liquid 2. As a specific application example, there is a case where a liquid for atomization is boiled for the purpose of sterilization or the like, and in this case, the amount of dissolved air in the liquid is remarkably reduced, so that it is not suitable for atomization. Therefore, by introducing clean air from which bacteria and the like have been removed with a filter into the atomizing liquid, atomization without fear of contamination by bacteria can be performed.

(Second Embodiment)
FIG. 2 is a side sectional view showing a configuration of an ultrasonic atomizing apparatus 1A according to the second embodiment of the present invention.
The ultrasonic atomizer 1A of this embodiment is obtained by adding a blower fan 18 and a partition plate 19 to the configuration of the ultrasonic atomizer 1 of the first embodiment.

  Many ultrasonic atomizers including the ultrasonic atomizer 1 </ b> A of the present embodiment introduce air into a region higher than the liquid level of the liquid 2 in the container 10 by the blower fan 18. The droplets 4 are caused to accompany the air flow 18a caused by the above and are discharged to the outside from the spray port 14. Since the blower fan 18 is disposed at a position sufficiently higher than the liquid level so as not to be immersed in the liquid 2, the airflow 18 a is once guided to the liquid surface side by the partition plate 19, and the airflow 18 b directed from the liquid surface side toward the spray port 14. Has produced. However, a part of the airflow 18c guided to the liquid surface side by the partition plate 19 works to crush the liquid column 3 obliquely from above, and there is a possibility that the amount of atomization is reduced.

  On the other hand, in the ultrasonic atomizer 1 of the present embodiment, the ascending air flow 6a is generated at least in the region near the liquid column 3 by introducing air into the vibration region 5 by the air supply mechanism. The rising airflow 6a can weaken the airflow 18c in the direction of crushing the liquid column 3 by the blower fan 18, and can suppress a decrease in the amount of atomization.

(Third embodiment)
FIG. 3 is a side sectional view showing a configuration of an ultrasonic atomizing apparatus 1B according to a third embodiment of the present invention.
As shown in the figure, in the ultrasonic atomizer 1B of this embodiment, the two air introduction portions 16A and 16B are directed from the side surface of the vibration region 5 toward the vibration region 5, for example, from two directions orthogonal to each other. Arranged so that air can be introduced.

  Further, three or more air introduction portions may be arranged so that air can be introduced from different directions from different positions around the vibration region 5 toward the vibration region 5.

  As described above, the plurality of air introduction portions are arranged so as to be able to introduce air from a plurality of positions toward a vibration region 5 from a plurality of positions around the vibration region 5, so that more bubbles 6 are generated in the vibration region 5. Can be introduced, and the amount of atomization can be increased.

(Fourth embodiment)
FIG. 4 is a side sectional view showing a configuration of an ultrasonic atomizer 1C according to the fourth embodiment of the present invention.
As shown in the figure, the ultrasonic atomizing device 1C of this embodiment is obtained by changing the air introduction part 16 of the second embodiment shown in FIG. 2 to an annular air introduction part 16C.

FIG. 5 is a plan view of an annular air introduction portion 16C.
The annular air introduction portion 16 </ b> C is formed in an annular shape so that air can be introduced into the vibration region 5 from the entire circumferential direction of the vibration region 5. Thereby, in the vibration area | region 5, more bubbles 6 gather in the projection center part of the vibration surface of the ultrasonic transducer | vibrator 11 which the liquid column 3 generate | occur | produces, and it can increase the amount of atomization.

(Fifth embodiment)
FIG. 6 is a side sectional view showing a configuration of an ultrasonic atomizing apparatus 1D according to the fifth embodiment of the present invention.
As shown in the figure, the ultrasonic atomizing device 1D of this embodiment is changed from the annular air introduction portion 16C of the fourth embodiment shown in FIGS. 4 and 5 to a cylindrical air introduction portion 16D. It is a thing.

  The cylindrical air introduction portion 16D is covered with a covering material 21 having an air shielding effect on the outer peripheral surface so that bubbles 6 are generated only from the inner peripheral surface of the porous material. Thereby, air can be concentrated and introduced into the vibration region 5, and the amount of air introduced into the vibration region 5 can be increased without changing to the high-power air pump 15. Thereby, the increase in the amount of atomization can be aimed at.

  Further, the ultrasonic wave generated from the ultrasonic transducer 11 is reflected on the inner peripheral wall surface of the cylindrical air introduction part 16D, so that the vibration energy can be increased, and this also increases the amount of atomization. be able to.

  The air introduction part 16, the air introduction part 16A, the air introduction part 16B, and the air introduction part 16C of the first to fourth embodiments also vibrate similarly to the air introduction part 16D of the fifth embodiment. You may make it coat | cover with a coating | covering material except the surface of the area | region 5 side.

(Sixth embodiment)
FIG. 7 is a side sectional view showing a configuration of an ultrasonic atomizing apparatus 1E according to the sixth embodiment of the present invention.
As shown in the figure, the ultrasonic atomizer 1E of this embodiment is obtained by changing the cylindrical air introduction part 16D of the fifth embodiment shown in FIG. 6 to an inclined cylindrical air introduction part 16E. It is.

  The inclined cylindrical air introduction portion 16E is displaced in the horizontal direction with respect to the opening portion 22 on the liquid level side which is the upper cylindrical opening portion with respect to the opening portion 22 on the ultrasonic transducer 11 side which is the lower cylindrical opening portion. It is formed in an inclined shape so as to form a positional relationship. Therefore, the ultrasonic wave propagates along the inclination in the inclined cylindrical air introduction part 16E, and the liquid column 3 is inclined in the direction of the inclination. By tilting the liquid column 3 in this way, when the liquid 2 that has reached the top of the liquid column 3 falls to the liquid surface by gravity, the liquid 2 falls on one side of the liquid column 3 and is already atomized. It is possible to reduce the amount of the droplet 4 that is caught and dropped. Therefore, the amount of atomization can be increased.

(Seventh embodiment)
FIG. 8 is a side sectional view showing a configuration of an ultrasonic atomizer 1F according to a seventh embodiment of the present invention.
The ultrasonic atomizer 1F of this embodiment is obtained by adding a cylindrical guide member 24 to the configuration of the ultrasonic atomizer 1C of the fourth embodiment shown in FIGS. 4 and 5.

  The guide member 24 is a cylindrical member that is disposed in the vibration region 5 and guides the bubbles 6 generated in the vibration region 5 by introducing air into the vibration region 5 by the air supply mechanism toward the gas-liquid interface of the vibration region 5. is there.

  Openings 25 and 26 are provided at both ends of the guide member 24 on the ultrasonic transducer 11 side and the gas-liquid interface side, respectively. The guide member 24 has a plurality of bubbles that are openings for introducing the bubbles 6 generated in the vibration region 5 by introduction of air into the vibration region 5 by the air supply mechanism into the bubble guide space 27 inside the cylinder. An introduction part 28 is provided.

FIG. 9 is a cross-sectional view of the guide member 24 in FIG.
In order to introduce the bubbles 6 generated in the vibration region 5 by the introduction of air into the vibration region 5 by the annular air introduction portion 16 </ b> C from various directions into the bubble guide space 27 inside the cylindrical body, a plurality of bubble introduction portions 28. Are provided around the cylindrical body of the guide member 24, for example, at equal intervals.

  According to the ultrasonic atomizing apparatus 1F of the present embodiment, most of the bubbles 6 generated in the vibration region 5 due to the introduction of air into the vibration region 5 by the air introduction portion 16C are vibrated by the bubble guide space 27 of the guide member 24. 5 can be collected at the gas-liquid interface. Thereby, the amount of atomization can be increased.

  Further, as shown in FIG. 8, the guide member 24 may have a cylindrical shape whose tube diameter decreases as it approaches the gas-liquid interface of the liquid 2. When such a guide member 24 is used, the ultrasonic wave generated from the ultrasonic transducer 11 is reflected and converged on the inner peripheral side surface of the guide member 24, thereby causing the ultrasonic transducer to vibrate in the orthogonal direction (vibration direction). Concentrate and give stronger vibration energy to the gas-liquid interface. Thereby, the amount of atomization can be increased.

  In the seventh embodiment, the annular air introduction part 16C is used, but a plate-like air introduction part or a cylindrical air introduction part may be used.

(Eighth embodiment)
FIG. 10 is a side sectional view showing a configuration of an ultrasonic atomizing apparatus 1G according to the eighth embodiment of the present invention.

  In this ultrasonic atomizing apparatus 1G, the ultrasonic transducer 11 is held on the bottom of the container 10 via a ring-shaped packing material 32. More specifically, a through-hole 31 is provided at the bottom of the container 10, and an ultrasonic wave is provided on the lower opening side of the through-hole 31 with a mounting cover 33 via a ring-shaped packing material 32. A flange portion 34 that forms a space 35 for accommodating the vibrator 11 is provided. The ring-shaped packing material 32 is made of, for example, rubber packing. A groove 32 a for holding the outer edge portion of the ultrasonic transducer 11 is provided on the inner peripheral side of the ring-shaped packing material 32.

  The ring-shaped packing material 32 is provided with an air circulation hole 32 b having one end opened to the liquid storage region in the container 10 and the other end opened to the outside of the container 10. The end of the air circulation hole 32 b that opens to the outside of the container 10 is connected to the air pump 15 via the tube 17.

  According to the ultrasonic atomizing apparatus 1G of the present embodiment, the air from the air pump 15 is supplied to the vibration region 5 in the container 10 through the air circulation hole 32b of the packing material 32. As in the seventh embodiment, it is not necessary to hang the tube 17 from above in the container 10, and air can be directly introduced into the vibration region.

(Modification)
Further, as shown in FIG. 11, a porous material such as an air stone is passed through another tube 36 to the end of the air circulation hole 32 b provided in the packing material 32 that opens to the liquid storage region in the container 10. You may connect the air introduction part 16F comprised using.

  In the above, an embodiment in which the air introduction part is arranged in the vicinity of the vibration region so that the amount of air dissolved in the liquid is large, that is, the liquid having a high dissolved air concentration can be directly introduced into the vibration region. Explained. However, the present invention is not limited to this. For example, bubbles may be introduced into the atomizing liquid outside the vibration region. In the above embodiment, since air is introduced into the vibration region, the vibration characteristics of the vibration region may change, and in this case, it is necessary to adjust the vibration control of the ultrasonic vibrator to cope with it. When bubbles are not introduced, there is no need to adjust the vibration characteristics.

  In the above embodiment, the ultrasonic vibrator 11 is fixed to the opening provided at the bottom of the container 10 and the liquid 2 is arranged so as to be in direct contact with the vibration surface of the ultrasonic vibrator 11. Alternatively, a so-called double chamber type container may be provided in which a vibrating partition wall is provided and vibration is applied to the atomizing liquid 2 through the vibration transmitting liquid. Moreover, it is good also as a structure which does not open the bottom part of the container 10 but uses the container bottom part as a part of ultrasonic transducer | vibrator, and vibrates a container bottom part.

  The ultrasonic atomizer according to the present invention can be applied to, for example, an ultrasonic humidifier, an inhaler (nebulizer), and the like.

  Further, a special gas may be introduced into the liquid instead of air. Thereby, the ultrasonic atomization apparatus aiming at atomizing and spraying the liquid which dissolved special gas can be constituted. Such an ultrasonic atomizer is particularly suitable for spraying solutions such as ozone and carbon dioxide that are normally gaseous. In addition, the present invention can be applied as a chemical liquid mixer that introduces a drug that cannot be stored for a long time in a container into a liquid as a gas and atomizes and sprays the liquid in which the drug is dissolved.

DESCRIPTION OF SYMBOLS 1 ... Ultrasonic atomizer 5 ... Vibration area 6 ... Bubble 10 ... Container 11 ... Ultrasonic vibrator 15 ... Air pump 16 ... Air introduction part

Claims (10)

A container for storing a liquid for atomization;
An ultrasonic transducer arranged to contact the liquid in the container;
An ultrasonic atomizer comprising: an air supply mechanism that supplies air into the liquid. The ultrasonic atomizer according to claim 1,
The ultrasonic atomizing device, wherein the air supply mechanism supplies air to a vibration region formed by the ultrasonic transducer. The ultrasonic atomizer according to claim 1 or 2,
The air supply mechanism is
An air source,
An ultrasonic atomizing device comprising: an air introduction unit that introduces the air of the air generation source into the vibration region. The ultrasonic atomizer according to claim 3,
The ultrasonic transducer is disposed at the bottom of the container;
The ultrasonic atomizer configured to introduce the air from the side surface of the vibration region toward the vibration region. The ultrasonic atomizer according to claim 4,
The air introducing unit is an ultrasonic atomizing device having an annular shape or a cylindrical shape. The ultrasonic atomizer according to claim 5,
The air introduction portion has a cylindrical shape, and the end portion on the gas-liquid interface side of the cylindrical air introduction portion is displaced in the horizontal direction with respect to the end portion on the ultrasonic transducer side of the cylindrical air introduction portion. Ultrasonic atomizer that is open at different positions. The ultrasonic atomizer according to any one of claims 1 to 6,
A guide member that is disposed so as to surround a side surface of the vibration region, and that forms a bubble guide space that guides bubbles generated in the vibration region by introduction of the air into the vibration region toward a gas-liquid interface; Ultrasonic atomizer. The ultrasonic atomizer according to claim 7,
The ultrasonic atomization device, wherein the guide member is a cylindrical guide member whose tube diameter decreases as the gas-liquid interface of the liquid approaches. The ultrasonic atomizer according to any one of claims 1 to 8,
The ultrasonic atomizer which has the air introduction part which the said air introduction part consists of a porous member. The ultrasonic atomizer according to claim 3,
The ultrasonic transducer is held through a packing material in a through-hole provided in the bottom of the container,
The packing material has an air circulation hole having one end opened in the container and the other end communicated with the air generation source.

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