JP4706232B2 - Ultrasonic atomizer - Google Patents

Description

  The present invention relates to an ultrasonic atomizer.

When the liquid is irradiated with ultrasonic waves, capillary waves are formed in the liquid surface and in the liquid, and the liquid is vigorously divided, and a part of the liquid is atomized. This ultrasonic atomization phenomenon is used in ultrasonic humidifiers, ultrasonic fractionators, and the like.
For example, ultrasonic atomization is also used for the alcohol fractionator using ultrasonic waves described in Patent Document 1 by the applicants.
This alcohol fractionating device includes an atomization device that includes a liquid container into which a liquid containing alcohol is injected and a ceramic vibrator installed at the bottom of the liquid container. In this atomization apparatus, the liquid that has received the ultrasonic radiation pressure generated by the ceramic vibrator is ejected along the radiation axis of the ultrasonic waves to form a liquid column. A portion of the liquid column at the interface with the air is finely divided by ultrasonic vibration, and is separated from the main body portion of the liquid column and atomized.
Japanese Patent No. 3479120 FIG.

  Note that the amount of liquid atomized in this type of ultrasonic atomizer is proportional to the area of the interface between the liquid column and the air, that is, the surface area of the liquid column. Here, it is assumed that the volume per unit time of the liquid ejected by ultrasonic vibration is constant regardless of the shape of the liquid column. At this time, if a liquid column having a small cross-sectional area and a shape extending long on the radial axis is formed, a larger surface area of the liquid column can be obtained, and thus more atomization per unit time can be performed. it can.

However, in this type of atomizer, since the ultrasonic vibration radiated from the ultrasonic vibrator installed at the bottom diffuses and the cross-sectional area of the liquid column increases, the liquid column is placed on the ultrasonic radiation axis. It is difficult to extend for a long time. For this reason, the amount of atomization per unit time of the liquid with respect to ultrasonic vibration energy could not be increased.
This invention is made | formed in view of this problem, Comprising: It aims at providing the ultrasonic atomizer which can atomize a liquid efficiently.

The method is an ultrasonic atomizing device that atomizes the liquid by irradiating the liquid with an ultrasonic wave, the liquid container for containing the liquid, and the liquid container disposed at the bottom of the liquid container. The ultrasonic transducer that emits ultrasonic waves along the virtual radiation axis toward the liquid surface of the liquid crystal and the cross-sectional area at the tip is smaller than the cross-sectional area at the base end, and the cross-sectional area is smaller or equal at the tip A cylindrical nozzle member having an in-cylinder space, wherein in the liquid container, the proximal end side is directed to the ultrasonic transducer side, and the distal end side is directed to a side away from the bottom portion, and the virtual radiation axis is It is provided at a position passing through the base end opening surface on the base end side of the in-cylinder space, and has a communication path for communicating the liquid in the in-cylinder space with the liquid around the nozzle member, or And a nozzle member configured between the liquid container and The nozzle member consists placed detachably at the bottom of the liquid container is an ultrasonic atomizer.

  In the ultrasonic atomizing apparatus of the present invention, the nozzle member is arranged so that the virtual radial axis of the ultrasonic transducer that emits ultrasonic waves passes through the proximal end opening surface on the proximal end side of the in-cylinder space. Yes. For this reason, when ultrasonic vibration is generated by the ultrasonic vibrator in a state where the liquid is put in the liquid container and the liquid in the cylinder space of the nozzle member is filled, the ultrasonic vibration is generated based on the cylinder space. It progresses from the end side toward the front end side. Then, the liquid in the in-cylinder space is ultrasonically vibrated and pushed out in the direction of the virtual radial axis, and ejected from the tip of the nozzle member. As the liquid is ejected, the liquid is continuously supplied into the in-cylinder space from the communication path.

In the atomization apparatus of the present invention, the in-cylinder space has a smaller cross-sectional area at the tip than the cross-sectional area at the base end, and the cross-sectional area is smaller or equal at the tip side. The ultrasonic energy is concentrated, and the liquid is ejected vigorously from the tip of the nozzle member.
The liquid column formed by this injection has a small cross-sectional area and can be formed in a long shape as compared with the case where no nozzle member is used. Moreover, the ultrasonic vibration transmitted through the liquid column is also increased. Therefore, more mist can be generated from such a liquid column.
As described above, in the ultrasonic atomizing apparatus of the present invention, the ultrasonic vibration emitted from the ultrasonic vibrator is focused by the nozzle member to form a liquid column and transmit strong ultrasonic vibration to the liquid column. More liquid can be atomized as compared with the case where there is no nozzle member.
Moreover, in the ultrasonic atomizer of the present invention, since the nozzle member is detachably placed, the liquid container and the nozzle member can be easily cleaned and maintained.
In particular, it can be suitably used in the case of atomizing a liquid that is required to be clean, such as beverages such as alcoholic beverages and medicines, or in the case of atomizing a liquid that easily clogs nozzle members such as industrial wastewater. .

  Here, among the nozzle members, the form of the in-cylinder space is any form as long as the cross-sectional area at the tip is smaller than the cross-sectional area at the base end, and the cross-sectional area is smaller or equal to the tip side. Good. Therefore, the shape of the in-cylinder space may be a tapered shape as a whole, or may be a combination of a cylindrical portion and a tapered portion. Specifically, for example, the in-cylinder space has a truncated cone shape. Further, an exponential shape in which the diameter of the cross section of the in-cylinder space is exponentially increased toward the base end side is preferable because the ultrasonic energy can be concentrated efficiently. In addition, the cross-sectional shape of the in-cylinder space may be circular or quadrangular.

As the ultrasonic transducer, a known ultrasonic transducer using a piezoelectric element or a magnetostrictive element used for atomizing a liquid can be used.
Further, the ultrasonic transducer may be arranged so that the virtual radiation axis of the ultrasonic wave radiated from the ultrasonic transducer intersects the liquid surface. It is preferable to arrange the ultrasonic transducer so that the virtual radiation axis is oblique to the liquid surface. This is because even when the fluctuation of the liquid amount occurs, the fluctuation of the distance from the vibrator to the liquid level becomes smaller than the fluctuation of the liquid level.
Further, the nozzle member only needs to be disposed so that the virtual radial axis of ultrasonic vibration passes through the proximal end opening surface on the proximal end side of the in-cylinder space. This is because ultrasonic vibration can be guided to the in-cylinder space. Note that it is particularly preferable that the virtual radiation axis coincides with the space axis of the nozzle member because the ultrasonic wave is efficiently transmitted to the liquid in the cylinder space.

  In addition, the communication passage may be in any form as long as it is a passage through which the liquid in the liquid container can flow into the in-cylinder space. Examples of the form of the communication path include a through hole provided in the nozzle member itself and a gap provided between the nozzle member and the liquid container. Further, in the latter case, the gap formed by separating the nozzle member itself from the bottom surface of the liquid container, the gap provided between the bottom surface of the nozzle member and the bottom surface of the container, and the bottom surface of the liquid container with the nozzle member. For example, there may be a gap provided with a recessed groove or the like serving as a communication path between them.

  Furthermore, in the above-described ultrasonic atomizing device, the nozzle member is an ultrasonic fog in which a space axis of the in-cylinder space is arranged at a position that coincides with the virtual radiation axis of the ultrasonic transducer. It is better to use a device.

  In the ultrasonic atomizer of the present invention, the space axis of the in-cylinder space coincides with the virtual radiation axis of the ultrasonic transducer, so that the ultrasonic wave radiated from the ultrasonic transducer is efficiently in-cylinder. It is transmitted to the liquid in the space. Then, since a liquid can be ejected vigorously from the front-end opening part of a nozzle member, a large amount of liquid can be atomized more efficiently.

  Furthermore, in the ultrasonic atomizing device, the ultrasonic wave is provided with a form in which the nozzle member and the bottom of the liquid container are fitted or engaged with each other to position and hold the nozzle member on the bottom. An atomizer is recommended.

  In the ultrasonic atomizer of the present invention, the nozzle member and the bottom of the liquid container are fitted or engaged with each other to position and hold the nozzle member on the bottom. Accordingly, since the nozzle member can be easily positioned and disposed when the nozzle member is disposed at the bottom of the liquid container, an ultrasonic atomizing device that can be easily handled can be obtained.

  Furthermore, in any one of the above-described ultrasonic atomizers, the nozzle member is located at a position that is near the liquid level or below the liquid level when a predetermined amount of liquid is stored in the liquid container. The ultrasonic atomizer may include an upper communication hole that allows the in-cylinder space and the space around the nozzle member to communicate with each other.

  When atomizing a mixture of substances (liquids) with different specific gravity, such as water and alcohol or water and organic solvent, even if they are mixed with each other, the ratio of substances with low specific gravity increases near the liquid surface. Has come to understand. Therefore, when the liquid near the liquid surface is atomized and this mist (microdroplets) is collected, a liquid containing a relatively large amount of a substance having a lighter specific gravity than before the treatment can be obtained. That is, two liquids having different specific gravities can be fractionated by atomization. For example, in a mixed solution of water and alcohol, a liquid with a high alcohol concentration can be recovered.

  In the ultrasonic atomizer of the present invention, the nozzle member is provided with an upper communication hole. For this reason, when a predetermined amount of liquid is injected into the liquid container, the liquid that is ejected from the tip of the nozzle member and atomized contains a large amount of liquid drawn into the in-cylinder space from the upper communication hole. It becomes. Therefore, when a mixture of substances (liquids) with different specific gravities is used as the liquid, this ultrasonic atomizer generates a mist that contains a lot of components near the liquid surface, such as a liquid with a low specific gravity. And can be used for fractionating a liquid from a mixed liquid.

  An embodiment of an ultrasonic atomizer according to the present invention will be described with reference to FIGS.

  The ultrasonic atomizer 10 concerning a 1st Example is demonstrated with reference to FIGS. 1-4. FIG. 1 is an explanatory diagram of an overall configuration of the ultrasonic atomizer 10 according to the first embodiment. FIG. 2 is an explanatory view showing the state of the bottom 11t of the liquid container 11 and the ultrasonic transducer 12 in the ultrasonic atomization apparatus 10 according to the first embodiment, where (a) is a longitudinal sectional view, (B) is the top view. 3A and 3B are explanatory views of the nozzle member 14, wherein FIG. 3A is a longitudinal sectional view of the nozzle member, and FIG. 3B is a top view thereof. 4A and 4B are explanatory views showing the relationship among the liquid container 11, the ultrasonic transducer 12, and the nozzle member 14. FIG. 4A is a longitudinal sectional view, and FIG. 4B is a top view.

  First, the ultrasonic atomizer 10 of the first embodiment will be described. As shown in FIG. 1, the ultrasonic atomization apparatus 10 of the first embodiment includes a liquid container 11 for storing the liquid LQ and a plurality of ultrasonic transducers 12 disposed on the bottom 11 t of the liquid container 11. And an atomization drive circuit 13 for driving these ultrasonic transducers 12, and a nozzle member 14 that is arranged corresponding to the ultrasonic transducers 12 at the bottom 11 t of the liquid container 11 and can be attached and detached.

Among these, the liquid container 11 is provided with a pressure feed hole 11a as shown in FIG. Further, although not shown, a pressure feeding means using an existing electric fan is provided on the distal end side (left direction in FIG. 1) of the pressure feeding hole 11a, and air is fed in the pressure feeding direction AIN. The liquid container 11 is provided with a delivery hole 11b at a position facing the pressure feed hole 11a. Therefore, the mist MI generated as described later is pushed by the air fed in the pressure feeding direction AIN from the pressure feeding hole 11a and sent out in the sending direction AOUT.

  Moreover, the ultrasonic transducer | vibrator 12 of the ultrasonic atomizer 10 is a type which produces an ultrasonic vibration using the well-known disk-shaped atomizing piezoelectric element. When driving power is applied to the ultrasonic vibrator 12 by the connected atomization drive circuit 13, the ultrasonic vibrator 12 is directed from one surface into the liquid container 11 and is located at the axial center of the ultrasonic vibrator 12. Ultrasound is radiated along the coincident virtual radiation axis AX (see FIG. 3).

Next, the nozzle member 14 in the ultrasonic atomizer 10 according to the first embodiment will be described with reference to FIG.
The nozzle member 14 is positioned on the proximal end side of the tapered portion 14t having a tapered shape, the flange portion 14f having a shape protruding radially outward, and on the proximal end side of the tapered portion 14t. And a bottom portion 14g including a bottom surface 14b.
Further, the interior of the nozzle member 14 is cut out so that the cross-sectional area Ss at the distal end 14s is smaller than the cross-sectional area Sk at the base end 14k with the space axis BX as the center. Specifically, the in-cylinder space 14n inside the nozzle member 14 has a truncated cone shape whose sectional area becomes smaller toward the tip end 14s.
Further, a communication path for introducing liquid into the in-cylinder space 14n is provided between the bottom 14g of the nozzle member 14 and the bottom 11t of the liquid container 11 when the nozzle member 14 is disposed in the liquid container 11. Three semi-cylindrical notches 14r to be formed are provided.

Next, the relationship among the bottom 11t of the liquid container 11, the ultrasonic vibrator 12, and the nozzle member 14 in the ultrasonic atomizer 10 according to the first embodiment will be described with reference to FIGS.
First, as shown in FIG. 3, the bottom portion 11t of the liquid container 11 includes a flat flat bottom surface portion 11h and an inclined concave portion 11e which is inclined from the flat bottom surface portion 11h and is recessed in a substantially circular shape. The inclined concave portion 11e includes an inclined bottom surface portion 11d that is a substantially circular ring-shaped flat portion, and an inclined side surface portion 11c that is interposed between the inclined bottom surface portion 11h and rises from the inclined bottom surface portion 11d. The diameter of the inclined bottom surface portion 11d is slightly larger than the diameter of the flange portion 14f of the nozzle member 14.

  In addition, a through hole 11f having a diameter smaller than the diameter of the ultrasonic transducer 12 is provided in the vicinity of the center of the inclined bottom surface portion 11d in the inclined concave portion 11e. Further, the ultrasonic vibrator 12 is fixed to the bottom portion 11t of the liquid container 11 from the outer side of the liquid container 11 (downward in FIG. 3A) so as to close the through hole 11f.

In this state (see FIG. 3), that is, in a state where the nozzle member 14 is not provided, when the atomization drive circuit 13 is operated to generate the ultrasonic vibration AU in the ultrasonic vibrator 12, The liquid level LM of the liquid LQ accommodated in the liquid container 11 rises to form a liquid column LP0 in the form of a fountain. Furthermore, the ultrasonic vibration AU transmitted through the liquid column LP0 causes the liquid LQ on the surface of the liquid column LP0.
The droplet breaks up and mist MI0 is generated. Thus, even when the nozzle member 14 is not provided, the mist MI0 can be generated by the ultrasonic transducer 12.

Next, in the ultrasonic atomizer 10 according to the first embodiment, as illustrated in FIG. 4, the nozzle member 14 is disposed on the bottom 11 t of the liquid container 11. The nozzle member 14 is disposed in a state where the flange portion 14f of the nozzle member 14 is in contact with the inclined side surface portion 11c of the inclined recess 11e. At this time, the diameter of the inclined side surface portion 11c of the inclined concave portion 11e is slightly larger than the flange portion 14f of the nozzle member 14. For this reason, when the nozzle member 14 is disposed with the bottom portion 14g down and the flange portion 14f being inserted into the inclined recess portion 11e, the flange portion 14f is formed on the inclined side surface portion 11c of the inclined recess portion 11e. Positioning can be performed such that the bottom surface 14b comes into contact with the portion 11h.
Therefore, in the ultrasonic atomizing device 10, the virtual radiation axis AX of the ultrasonic transducer 12 and the in-cylinder space 14 n of the nozzle member 14 are simply placed in the inclined recess 11 e of the bottom 11 t of the liquid container 11. The nozzle member 14 can be appropriately disposed on the bottom portion 11t so that the space axis BX substantially coincides with the space axis BX.

Next, an operation of the ultrasonic atomizer 10 according to the first embodiment in a state where the nozzle member 14 is disposed at a predetermined position will be described.
As shown in FIG. 4, the ultrasonic transducer 12 disposed on the bottom 11t of the liquid container 11 radiates ultrasonic waves along the virtual radiation axis AX toward the liquid level LM of the liquid LQ.
Further, the nozzle member 14 has the base end 14k side directed toward the ultrasonic transducer 12, while the tip end 14s is protruded from the liquid level LM in the upper direction of the liquid level (upward in FIG. 4). The radial axis AX is disposed at a position passing through the opening surface of the base end 14k of the in-cylinder space 14n.
At this time, the ultrasonic vibration AU generated from the ultrasonic transducer 12 travels in the in-cylinder space 14n from the proximal end 14k toward the distal end 14s along the virtual radiation axis AX. Then, the liquid LQ in the in-cylinder space 14n is ultrasonically vibrated and pushed in the direction of the virtual radial axis AX, and ejected from the tip of the nozzle member 14 to form the liquid column LP. As the liquid LQ is ejected, the liquid LQ is continuously replenished into the in-cylinder space 14n from the gap between the cutout portion 14r and the inclined bottom surface portion 11d of the inclined concave portion 11e as indicated by the arrow IN1.

  In the ultrasonic atomizer 10 according to the first embodiment, as shown in FIG. 2, the in-cylinder space 14n has a smaller cross-sectional area Ss at the distal end 14s side opening than a sectional area Sk at the proximal end 14k side opening. It has a form. Therefore, in the in-cylinder space 14n, the ultrasonic energy is concentrated toward the tip 14s side, and the liquid LQ is ejected vigorously from the tip 14s of the nozzle member 14 to form the liquid column LP, and at the liquid column LP. Powerful ultrasonic vibration is transmitted.

  The liquid column LP (see FIG. 4) formed by this injection has a smaller cross-sectional area and a longer elongated shape than the liquid column LP0 (see FIG. 3) formed without using the nozzle member 14. . In addition, the ultrasonic vibration transmitted through the liquid column LP has a large amplitude and becomes strong. Therefore, more mist MI can be generated from the liquid column LP as compared with the liquid column LP0 formed when the nozzle member 14 is not used.

  In particular, in the ultrasonic atomizer 10, the virtual radiation axis AX and the space axis BX of the in-cylinder space 14n are disposed so as to substantially coincide with each other. For this reason, in the ultrasonic atomizer 10, the ultrasonic wave radiated from the ultrasonic transducer 12 and passing through the in-cylinder space 14n of the nozzle member 14 is efficiently transferred along the space axis BX to the liquid in the in-cylinder space 14n. You can tell LQ. Therefore, in this ultrasonic atomizer 10, the liquid LQ can be efficiently atomized.

In the ultrasonic atomizer 10, the nozzle member 14 can be easily attached to and detached from the bottom 11t of the liquid container 11 as described above. Therefore, cleaning and maintenance of the liquid container 11 and the nozzle member 14 can be facilitated. For this reason, it is suitable when the liquid LQ is atomized using a beverage such as alcoholic beverages, a liquid such as medicine, or industrial wastewater.

Next, the ultrasonic atomizer 20 according to the second embodiment will be described with reference to FIG. 1, FIG. 5, and FIG. The ultrasonic atomizer 20 according to the second embodiment is different only in that a nozzle member 24 is used instead of the nozzle member 14 in the ultrasonic atomizer 10 of the first embodiment. Therefore, the following description will focus on the parts that are different from the ultrasonic atomization apparatus 10 of the first embodiment, and description of similar parts will be omitted or simplified.

In the ultrasonic atomization apparatus 20 of the second embodiment, the liquid container 11, the ultrasonic vibrator 12, and the atomization drive circuit 13 are the same as those in the first embodiment (see FIG. 1).
Similarly to the nozzle member 14 in the first embodiment, the nozzle member 24 includes a tapered portion 24t, a flange portion 24f, and a bottom portion 24g as shown in FIG. The inside of the nozzle member 24 is also hollowed out in the same manner as the nozzle member 14 so that the in-cylinder space 24n has a truncated cone shape whose sectional area decreases toward the tip 24s side. The third embodiment is the same as the first embodiment in that three notches 24r are provided.

  However, as shown in FIG. 6, the nozzle member 24 in the second embodiment is located at the liquid level LM or near the liquid level LM below the liquid level LM when a predetermined amount of the liquid LQ is accommodated in the liquid container 11. Further, the nozzle member 14 is different from the nozzle member 14 in the first embodiment in that three upper communication holes 24j are provided to communicate the in-cylinder space 24n and the space around the nozzle member 24.

  As described above, in the ultrasonic atomizer 20 of the second embodiment, the nozzle member 24 includes the three upper communication holes 24j. Therefore, when a predetermined amount of the liquid LQ is injected into the liquid container 11, the liquid LQ is discharged from the tip 24s of the nozzle member 24 as the liquid column LP2 as in the first embodiment, and mist MI2 is generated. . However, the discharged liquid column LP2 and mist MI2 contain a large amount of liquid LQX in the vicinity of the liquid level LM drawn into the in-cylinder space 24n from the upper communication hole 24j as indicated by the arrow IN2. become.

By the way, as described above, when a liquid mixture of liquids having different specific gravities, for example, a mixture of water and alcohol, is used as the liquid LQ, even when they are mixed with each other, near the liquid level LM (in FIG. In the liquid LQX in the shaded area in the vicinity of the LM, the ratio of the liquid having a low specific gravity (for example, alcohol) increases.
Therefore, when such a liquid LQ is used, the ultrasonic atomizer 20 can generate a mist MI2 having a high density (for example, alcohol concentration) of a liquid having a low specific gravity. Therefore, by recovering the mist MI2, a liquid having a low specific gravity (for example, alcohol) can be recovered from the liquid LQ, and can be suitably used for fractionating alcohol from a mixture of water and alcohol.

In the above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the above-described embodiments, and it can be applied as appropriate without departing from the scope of the present invention. Nor.
For example, in the first and second embodiments, the nozzle members 14 and 24 are illustrated as having a substantially conical shape, but may be a nozzle member having a substantially triangular pyramid shape or a substantially quadrangular pyramid shape.
In the first and second embodiments, the example in which the nozzle members 14 and 24 are disposed in contact with the inclined concave portion 11e formed in the bottom portion 11t of the liquid container 11 is shown. However, the nozzle member is disposed away from the liquid container. You may do it.
The nozzle members 14 and 24 are detachable, but may be fixed to the liquid container.

It is explanatory drawing which shows the structure of the ultrasonic atomization apparatus 10 whole concerning Example 1. FIG. It is explanatory drawing of the nozzle member 14 among the ultrasonic atomization apparatuses 10 concerning Example 1, (a) is a longitudinal cross-sectional view of a nozzle member, (b) is the top view. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which showed the state of the bottom part 11t of the liquid container 11, and the ultrasonic transducer | vibrator 12 among the ultrasonic atomization apparatuses 10 concerning Example 1, (a) is a longitudinal cross-sectional view, (b) is the upper surface. FIG. It is explanatory drawing which shows the relationship between the liquid container 11, the ultrasonic transducer | vibrator 12, and the nozzle member 14 among the ultrasonic atomization apparatuses 10 concerning Example 1, (a) is the longitudinal cross-sectional view, (b ) Is a top view. It is explanatory drawing of the nozzle member 24 among the ultrasonic atomization apparatuses 20 concerning Example 2, (a) is a longitudinal cross-sectional view of a nozzle member, (b) is the top view. It is explanatory drawing which shows the relationship between the liquid container 11, the ultrasonic transducer | vibrator 12, and the nozzle member 24 among the ultrasonic atomization apparatuses 20 concerning Example 2, (a) is the longitudinal cross-sectional view, (b) ) Is a top view.

10, 20 Ultrasonic atomizer 11 Liquid container 11t Bottom 12 Ultrasonic vibrators 14, 24 Nozzle members 14k, 24k Base end 14n, 24n In-cylinder space 14r, 24r Notch 14s, 24s Tip AX Virtual radial axis BX space Axis

Claims (4)

An ultrasonic atomizer that atomizes the liquid by irradiating the liquid with ultrasonic waves,
A liquid container for containing the liquid;
An ultrasonic transducer disposed at the bottom of the liquid container and radiating ultrasonic waves along a virtual radial axis toward the liquid surface;
A cylindrical nozzle member having an in-cylinder space having a configuration in which the cross-sectional area at the tip is smaller than the cross-sectional area at the base end, and the cross-sectional area is smaller or equal to the tip side
In the liquid container, the base end side is directed to the ultrasonic transducer side, while the distal end side is directed to the side away from the bottom,
The virtual radial axis is disposed at a position passing through the base end opening surface on the base end side of the in-cylinder space,
A communication path for communicating the liquid in the in-cylinder space with the liquid around the nozzle member, or a nozzle member configured between the liquid container ,
The ultrasonic atomizer , wherein the nozzle member is detachably placed on the bottom of the liquid container . The ultrasonic atomizer according to claim 1,
The nozzle member is an ultrasonic atomizing device in which a space axis of the in-cylinder space is arranged at a position that coincides with the virtual radiation axis of the ultrasonic transducer. The ultrasonic atomizer according to claim 1 or 2 , wherein
An ultrasonic atomizing device comprising: a form in which the nozzle member and the bottom of the liquid container are fitted or engaged with each other to position and hold the nozzle member on the bottom. It is an ultrasonic atomizer of any one of Claims 1-3 ,
The nozzle member is
An upper communication hole that communicates the in-cylinder space and the space around the nozzle member at a position near the liquid level or below the liquid level when a predetermined amount of liquid is stored in the liquid container. Sonic atomizer.

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