JP2006142119A - Portable supersonic wave atomizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable supersonic wave atomizer which overcomes problems of the insufficient heat liberation of a driving circuit in an atomizer which produces many atomized particles and a small particle size, the generation of stripping, looseness or slackening of a penetration membrane due to the liquid to be atomized and the long term operation and of the generation of pinholes of the penetration membrane during the welding such as supersonic welding, heat welding and the like when the penetration membrane is welded to the storing part. <P>SOLUTION: The portable supersonic wave atomizer conducts the heat liberation by cooling the transmission part to be filled with the supersonic transmission liquid, and the supersonic vibrator and the heat liberating member of the drive circuit with sucked open air, then introducing it to the generation part of the atomized particle to cool with the heat of vaporization of the generated atomized particle and discharging the open air to the outside from the jetting port through the nozzle part together with the atomized particle. The penetration membrane is mounted by an inserting means into a plurality of members in a state to be tensioned, not by means of adhesion and welding as the method to mount the penetration membrane between the transmission part to be filled with the supersonic transmission liquid and the storing part to place the liquid to be atomized to the lower part of the storing part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a technique for atomizing a liquid using ultrasonic waves.

As a prior art example, outside air is introduced, the outside air heated by cooling the housing portion is introduced into the mist generation unit, cooled by the heat of vaporization of the mist at the mist generation unit, There is a method in which the heated outside air is not released by ejecting the particles. See Patent Document 1.
In this case, adhesion or welding is considered when attaching the permeable membrane. See Patent Document 1.

Although there is a conventional technique as described above, the heat generated in the drive circuit is not considered in the conventional technique, and when the permeable film is adhered to the housing portion, the permeable film peels off due to the liquid to be atomized or long-time use. If the permeable membrane is welded or loosened, or if the permeable membrane is welded to the housing portion, there is ultrasonic welding or thermal welding, but there may be a hole in the permeable membrane during welding.
Patent Document 1 Japanese Patent Application No. 2003-346650

The problems to be solved by the present invention include the techniques described in the prior art. However, the heat radiation of the drive circuit cannot be sufficiently performed, the permeable film is peeled off or loosened due to the atomized liquid or long-time use, and sagging. There is a method such as ultrasonic welding or thermal welding when the permeable membrane is welded to the housing portion, but it is to avoid defects at the time of welding that the permeable membrane may have a hole.

In the present invention, the sucked outside air cools the transmission unit filled with the ultrasonic transmission liquid, the ultrasonic vibrator, and the heat dissipation member of the drive circuit, and then is guided to the mist generation unit. It cools and heat-processes by going out through a nozzle part with a mist from a jet nozzle outside.

In addition, as a method of attaching a permeable membrane between the transmission unit filled with the ultrasonic transmission liquid and the storage unit for storing the liquid to be atomized to the lower part of the storage unit, a plurality of pieces in a state where tension is applied instead of adhesion or welding It is mounted by sandwiching between members.

The present invention has the following effects due to the configuration as described above.
The temperature of the mist coming out from the jet port is not much different from the outside air temperature although there is a lot of heat generation in the transmission part, the ultrasonic vibrator and the heat radiating member of the drive circuit.
Further, even when various chemical solutions are used, the permeable membrane does not peel off, and the permeable membrane is not broken in the manufacturing process.

By the above method, a portable ultrasonic atomizing apparatus that is small and light, operates with a battery, and can be carried at travel or work can be provided.

The air flow from the air inlet to the jet outlet is as follows.
The air taken in from the air suction port is divided into the periphery of the transmission part, the heat dissipation member of the drive circuit placed around the transmission part, and the lower part of the ultrasonic vibrator, and the circumference of the transmission part and the lower part of the ultrasonic vibrator are cooled. At this time, an appropriate hole is formed in the heat radiating member, and the flow path around the transmission part and the lower part of the ultrasonic vibrator is narrowed to increase the air flow rate and enhance the cooling effect. Then, the air passes through the fan and flows into the mist generation unit. Along with the mist generated from the mist generation part, it passes through the inside of the nozzle and is ejected from the outlet.

FIG. 1 is a sectional view of the entire device of the present invention.
FIG. 2 is a cross-sectional view of the permeable membrane attachment portion of the present invention.
The apparatus 1 includes an ultrasonic transducer 3 that generates ultrasonic waves, an ultrasonic absorber 14 that holds the ultrasonic transducer 3 and absorbs reflected ultrasonic waves, a presser 18, and an ultrasonic container 5. The transmission unit 4 filled with the ultrasonic transmission liquid 19 to be transmitted to, the permeable membrane 15, the storage unit 5 for storing the liquid 20 that becomes mist, the air inlet 12 for taking in external air, and the flow of air The fan 13, the intake passage 11, the liquid reservoir 8 that prevents the liquid to be atomized from reaching the outside or the fan when the apparatus is tilted, and the protrusion 7 that surrounds the atomized particle generating unit 10. And a nozzle portion 6 that guides the mist particles together with the air to the ejection port 9, an ejection port 9 that ejects the mist particles and the air, an electric circuit 17, a battery 16, and a ring-shaped press-fit for fixing the permeable membrane 15. A ring 22 and an elastic O-ring 21 are provided.

The ultrasonic transducer 3 has a diameter of 20 mm and a resonance frequency of 2.3 MHz to 2.5 MHz, and the size of the generated mist is about 3 μm. The ultrasonic transducer 3 is held by the ultrasonic absorber 14, and the presser 18 holds the ultrasonic absorber 14. The ultrasonic transducer 3 has an electrode having a diameter of 10 mm in the center of the lower portion, the upper portion is the entire electrode, and the upper electrode is the circumference of the ultrasonic transducer 3 and the upper electrode is 3 mm from the lower circumference. Connected. The surface of the ultrasonic transducer 3 is bonded with a stainless steel foil of about 25 μm. The driving voltage is applied between the lower center electrode of the ultrasonic transducer 3 and the lower surrounding electrodes. By using this element, 2 g per minute could be secured when the amount of mist was water.

When the ultrasonic transducer 3 according to the present embodiment is employed, the transmission unit 4 has an amount of mist when the distance between the upper surface of the ultrasonic transducer 3 and the liquid level of the liquid that becomes mist is 30 mm to 45 mm. Can be secured. In order to ensure a sufficient amount of mist until the liquid in the container 5 is completely removed, the distance between the ultrasonic transducer 3 and the transmission film 15 is set to 30 mm to 40 mm. The transmission unit 4 is sterilized and sealed in order to suppress bacterial growth.

The permeable membrane 15 is a thin film of polyphenylene sulfide having a diameter of 10 mm. In this example, a permeable membrane having a thickness of 25 μm is used. The reason for adopting polyphenylene sulfide is that it is not toxic, has a high heat-resistant temperature, has a high secondary transition point of 92 ° C., and does not deteriorate in normal use. On the other hand, when the permeable membrane 15 is thick, the ultrasonic wave is not sufficiently transmitted to the liquid in the container 5, and the amount of mist is extremely reduced. On the other hand, if the thickness is reduced, the strength of the permeable membrane 15 decreases. Further, the permeable membrane 15 is attached with tension. If the permeable membrane 15 has looseness or sagging, the amount of mist is reduced.
The O-ring 21 is elastic, and the O-ring 21 is placed in a groove carved outside the lower portion of the housing portion 5 so that the inner diameter of the O-ring 21 is slightly smaller than the inner diameter of the groove inside the lower portion of the housing portion 5. is there. The resin ring 22 has a groove carved on the inside, and an O-ring is fitted in the groove. The inner diameter of the resin ring 22 is made slightly smaller than the inner diameter of the groove inside the lower portion of the accommodating portion 5, and an elastic resin is used.

The accommodating part 5 is in the same space as the mist generating part 10, and the diameter of the mist generating part 10 is made larger than that of the accommodating part 5 so that the mist is sufficiently generated even when the entire apparatus is tilted.

The material of the accommodating part 5, the protrusion part 7, and the nozzle part 6 was made into polytetrafluoroethylene. This makes it difficult for water droplets to adhere to the wall surface after use of the device, and even after washing with tap water, the water droplets can be removed simply by wiping with a clean cloth or tissue paper, thereby preventing bacterial growth. In addition, cleaning can be easily performed by adopting a structure in which the accommodating portion 5 and the protruding portion 7 and the nozzle portion 6 can be removed.

  The cooling path around the lower part of the ultrasonic transducer 3 and the transmission unit 4 and the path of air through which the mist is ejected from the ejection port 9 through the nozzle unit 6 together with air are shown below.

  The air sucked by the fan 13 enters from the air inlet 12, passes through the intake passage 11, and is divided into two flow paths. The two flow paths are the lower part of the ultrasonic transducer 3 and the periphery of the transmission unit 4. The air heated here passes through the fan 13, passes through the intake passage 11, is cooled by the heat of vaporization of the mist in the mist generation unit 10, passes through the nozzle portion 6 from below the protrusion 7, and is jetted. It ejects from the exit 9.

The hole of the ultrasonic absorber 14 has a diameter of 10 mm, and the permeable membrane 15 is disposed at an angle of 3 to 10 degrees with respect to the ultrasonic transducer 3. Since the ultrasonic wave generated from the ultrasonic transducer 3 has a property of being concentrated on the central portion of the upper portion of the ultrasonic transducer 3, when the liquid inside the storage unit 5 runs out, the permeable membrane 15 and the air The reflection of the ultrasonic wave that occurs between the two occurs near the center of the transmission film 15, and the ultrasonic wave that has returned to the ultrasonic absorber 14 is made to strike the ultrasonic wave absorber 14 so that the ultrasonic wave applied to the ultrasonic transducer 3 is reflected. It has a structure that avoids mechanical stress caused by reflected waves. The material of the ultrasonic absorber 14 is rubber.

  The battery 16 is a secondary battery and uses a lithium ion battery having the highest energy density.

By installing an exchangeable cartridge connected to the storage unit 5, the liquid 20 that becomes mist can be supplied.

By connecting a device that keeps the water level constant using the principle of siphon to the accommodating portion 5, it can be used continuously for a long time.

It can be used continuously for a long time by connecting a device using a pump or the like that can continuously supply a certain amount of liquid 20 that becomes mist.

By connecting a device using a timer that intermittently sends the liquid 20 that becomes mist, it can be used continuously for a long time.

The air discharged together with the mist can be other gases.

By incorporating a negative ion generation circuit in the electric circuit 17, the negative ion is added to the mist to enhance the absorption effect on the skin and to reduce the reduction potential of the liquid mist.

The shape of the jet port 9 of the nozzle part 6 is a folded structure, and it is also possible to have a function such that the liquid 20 that becomes the mist of the container part 5 does not leak even when the apparatus falls.

In addition, the hole of the ultrasonic absorber 14 does not necessarily need to be 10 mm, and it is good also as only the part which a reflected wave hits.

Further, the cooling intake passage provided in the lower part of the ultrasonic transducer 3 can also be provided with a convex portion for increasing the flow rate and enhancing the cooling effect.

In addition, an ultrasonic transducer drive circuit in the electric circuit 17 can be provided below the ultrasonic transducer 3 to simultaneously cool the heat generated by the circuit.

A circuit for stopping the supply of electric power to the ultrasonic transducer 3 when the temperature of the ultrasonic transmission liquid 19 in the transmission unit 4 is measured and the measured temperature is equal to or higher than a preset temperature; It is also possible to provide a circuit that does not automatically recover even when the temperature drops, and a function that must be turned off once in order to restart.

The temperature of the ultrasonic transmission liquid 19 in the transmission unit 4 is measured, and when the measured temperature is equal to or higher than a preset temperature, a circuit that stops oscillation is used as the ultrasonic transducer drive circuit in the electric circuit 17. Can also have.

When the oscillation of the ultrasonic transducer 3 is stopped, the ultrasonic transducer drive circuit in the electric circuit 17 has a circuit that does not automatically recover even when the temperature decreases. It is also possible to have the function of having to turn off the power once.

By installing the ultrasonic transducer drive circuit in the electric circuit 17 close to the lower portion of the ultrasonic transducer 3, the wiring to the ultrasonic transducer 3 can be shortened to reduce noise due to ultrasonic oscillation. Is possible.

To connect the ultrasonic vibrator 3 and the ultrasonic vibrator drive circuit in the electric circuit 17, a wire such as a low melting point alloy is brazed, and the wire is pulled by a spring. When the temperature of 3 is increased, a metal such as a low melting point alloy is melted and the supply of power to the ultrasonic vibrator 3 is stopped, thereby preventing the temperature increase and preventing the entire apparatus from overheating.

A thermal fuse is attached in contact with the ultrasonic transducer 3 or the transmission unit 4, and the ultrasonic transducer 3 and the ultrasonic transducer drive circuit in the electric circuit 17 are connected via the thermal fuse. When the temperature of the ultrasonic transducer 3 rises, the temperature fuse is blown, and the power supply to the ultrasonic transducer 3 is stopped, thereby preventing the temperature rise and preventing the entire apparatus from overheating. .

By using only the AC adapter as the power source of the apparatus and not including the battery 16, it is possible to reduce the size and weight, and to reduce the cost and enable continuous use. Moreover, the same effect can also be acquired by making a battery removable.

The portable ultrasonic atomizer 1 was able to be implemented by combining the above functions.

According to the present invention, when the mist is small and sprayed on the skin, it directly enters and is absorbed by the skin, so that water ions can be used not only for the purpose of moisturizing the skin but also by using chemicals etc. Since the component can be absorbed directly into the skin or the skin, there is a possibility of medical use.

In addition, since it is portable, it can be used for effectively spraying a fragrance, a deodorant or an insecticide not only indoors but also on the go.

Sectional drawing of the whole portable ultrasonic atomizer. Detailed cross-sectional view of the permeable membrane attached to the lower part of the storage part of the portable ultrasonic atomizer

The nozzle part 6 is equipped with a protruding part 7 having a function of separating water droplets and mist.

The shape of the jet port 9 of the nozzle part 6 has a function of not discharging the liquid 20 that becomes mist when falling over from the case 2.

Explanation of symbols

1. 1. Portable ultrasonic atomizer Case 3. Ultrasonic vibrator 4. Transmitter 5. Storage unit 6. Nozzle part 7. Projection 8 For liquid 9. Spout 10. Mist generation part 11. Intake passage 12. Air inlet 13. Fan 14. Ultrasonic absorber 15. Permeable membrane 16. Battery 17. Electrical circuit 18. Presser 19. Ultrasonic transmission liquid 20. 20. Liquid that becomes mist O-ring 22. Resin ring

Claims (2)

A container for storing atomizing liquid such as water or chemical liquid, a transmission unit for transmitting ultrasonic vibration to the atomizing liquid, and an ultrasonic wave for ultrasonically vibrating the ultrasonic transmission liquid in the transmission unit Oscillator, drive circuit for driving ultrasonic vibrator, heat radiating member for radiating heat generated by drive circuit, mist generating part for atomizing liquid in said container, and generated in mist generating part An ultrasonic atomizer comprising: a fan that discharges mist particles from a jet outlet; wherein the fan sucks outside air and is disposed in an intake passage that introduces the mist particles into a mist generation unit; and the transmission unit and the ultrasonic vibration The portable ultrasonic atomizer is characterized in that the child and the heat radiating member are accommodated in the intake passage so as to be cooled by outside air sucked by the fan. A permeable membrane that transmits ultrasonic waves at the lower part of the housing part is sandwiched between a plurality of members,
The portable ultrasonic atomizer according to claim 1, wherein the portable ultrasonic atomizer is arranged.

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