JPH073755U - Ultrasonic vibrator and atomizer - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a more reliable ultrasonic vibration device for an atomizer, which is particularly suitable for atomizing a disinfecting solution for sterilizing a hand. . [Structure] On an ultrasonic wave emitting surface 14h of a high-power ultrasonic transducer 14 which is driven by being supplied with electric power of a predetermined frequency from an oscillator 20, an atomizing medium supplied to a part of the ultrasonic wave emitting surface 14h is entirely covered by the capillary phenomenon. In an ultrasonic vibrating device having a medium diffusing portion 16 having a shape that spreads and is held in the above, at least the ultrasonic wave emitting surface of the high-power ultrasonic transducer is subjected to anticorrosion treatment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ultrasonic atomizing device particularly suitable for atomizing an antiseptic solution for sterilizing hands mainly in hospitals and clinics.

[0002]

[Prior art]

 In recent years, nosocomial infections in hospitals and clinics have become a social problem. To prevent this nosocomial infection, for example, alcohol is automatically sprayed with a disinfectant solution containing 0.2% benzalkonium chloride. There is a demand for a device that can sterilize and disinfect hands and fingers and that does not require the use of hand wipes to prevent secondary infection. Therefore, it is possible to sterilize the hand by atomizing the disinfectant solution and spraying it so that an appropriate amount of the disinfectant solution is instantly applied to the entire hand so that it does not require the use of hand towels.

At present, means for utilizing ultrasonic waves to atomize a liquid are generally adopted. The reason is that the atomization amount and atomization particle size have the advantage that they can be independently controlled by varying the power supplied to the ultrasonic transducer and the ultrasonic frequency. As the ultrasonic atomizer, the one used in the frequency band of 800 KHz to 3 MHz is most often used, and the representative one is the ultrasonic humidifier. This ultrasonic humidifier has the advantage that it does not have the various drawbacks of the previous evaporation type and rotary atomization type atomizers, but it makes the ultrasonic transducer directly contact the liquid to be atomized. Therefore, there is a drawback that the ions contained in water combine with carbon dioxide in the air to produce a white powder compound.

There is a medical humidifier as shown in FIG. 3 that solves the drawbacks of the humidifier. This humidifier is attached to the bottom opening of the water tank 1 with the fixing screw 4 via the support rubber 3 in a state where the ultrasonic transducer 2 is in contact with the water 5 in the water tank 1, and should be atomized. The liquid 6 is contained in the atomization chamber 8 in a state of being isolated from the water 5 by a thin permeable membrane 7 formed by processing a corrosion resistant plate such as a stainless plate or a polyester film. Therefore, since the sound wave from the ultrasonic oscillator 2 is not directly applied to the liquid 6 to be atomized but is propagated through water and transmitted, there is no drawback that the above-mentioned white powder compound is generated. Then, the droplets of the atomized liquid 6 are sprayed through the discharge pipe 10 by the air sent from the blower pipe 9 to the atomization chamber 8.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned medical humidifier requires a compressor or the like for sending air to the atomizing chamber 8 through the blower pipe 9, and the entire device becomes large in size, which is not suitable for installation in a hospital toilet or the like to prevent nosocomial infection. Not only that, but because the humidifier structurally requires a high ultrasonic frequency above a certain level, the atomized particle size is too small for the above-mentioned hand disinfection, and If the water 5 for sound wave propagation is lost, it will generate heat and be damaged, which is a safety problem.

By the way, in order to obtain droplets having an atomized particle size of 30 μm to 120 μm, which is suitable for hand disinfection, it is necessary to drive the ultrasonic transducer in the frequency range of 10 KHz to 100 KHz. As shown in FIG. 4, such an ultrasonic atomizing device has a configuration in which a bolt tightening type vibrator 11 such as a Langevin type vibrator or a magnetostrictive vibrator and an exponential horn 12 are combined. The explosive horn 12 provides an atomizing function. However, since the atomized droplets are concentrated at approximately one point by the exponential horn 12, it is suitable for applications such as combustion burners, but not suitable for applications such as atomizers. It cannot be used for disinfection. Further, since the bolt-tightened vibrator 11 is combined with the relatively long exponential horn 12, the shape becomes large and the bolt-tightened vibrator 11 itself becomes expensive.

Therefore, as an ultrasonic atomizing device that eliminates these drawbacks, a medium such as a metal mesh plate or a perforated plate is formed on the ultrasonic wave emitting surface of a bolt-tightened vibrator such as a Langevin-type vibrator or a magnetostrictive vibrator. An ultrasonic atomizing device provided with a diffusing section, and a medium supply system arranged so as to guide the atomizing medium (disinfectant) to a part of the medium diffusing section. ). However, in the case of these bolted Langevin type transducers, most of the material of the ultrasonic wave emitting surface is aluminum alloy, and the structure in which the detoxifying liquid, which is the atomizing medium, is directly dropped and atomized Corrosion of the metal surface by the liquid was unavoidable. Further, due to ultrasonic vibration, wear due to contact was unavoidable at the location where the ultrasonic radiation surface and the medium diffusion portion were bonded and fixed.

Therefore, it is a technical object of the present invention to provide a highly reliable ultrasonic atomizing device that is particularly suitable for atomizing an antiseptic solution for sterilizing hands.

[0009]

[Means for Solving the Problems]

 The present invention has an ultrasonic atomizing device configured as follows as a technical means for achieving the above-mentioned problems. That is, the atomizing medium supplied to a part of the ultrasonic wave emitting surface of the high-power ultrasonic transducer that is driven by being supplied with electric power of a predetermined frequency from the oscillator spreads over the entire emitting surface due to the capillary phenomenon. In an ultrasonic atomizing device in which a medium diffusing section having a shape to be held is provided and a medium supply system is arranged to guide an atomizing medium to a part of the medium diffusing section, At least the ultrasonic radiation surface was subjected to anticorrosion treatment. Then, at least the ultrasonic wave radiating surface was made of aluminum alloy and subjected to alumite treatment as anticorrosion treatment.

[0010]

[Action]

 Bolt-tightened Langevin-type oscillators (Type A) with anodized metal on the radiating metal surface and untreated bolt-tightened Langevin-type oscillators (Type B) were manufactured. An ultrasonic atomizer was produced by using it. Then, an atomization test was conducted using each ultrasonic atomizer. The atomization conditions are described below. While supplying 30 W of alternating power with a frequency of 40 KHz to the vibrator, a disinfectant solution was dropped on the solution introduction part of the mesh metal plate with a mesh hole diameter of 500 μm. One cycle consists of atomization for 2 seconds (atomization amount of 3 cc) and stop for 25 seconds, and this was repeated 100,000 cycles. After that, the appearance check of the radiated metal surface and the atomization efficiency were compared. As a result, the type A radiating metal surface had no particular change in appearance other than some scratches, and the atomization efficiency was unchanged from the initial level (0.6 cc / sec). On the other hand, on the radiating metal surface of type B, peeling of the surface layer, which is considered to be caused by corrosion and friction due to vibration with the mesh-shaped metal plate, was observed. The atomization efficiency was also reduced to 1/3 of the initial level (0.2 cc / sec). As can be seen in this atomization test, compared to a bolted Langevin-type transducer whose radiation metal surface is untreated, an ultrasonic atomization device assembled using a bolted Langevin-type transducer with anodized aluminum on the radiation metal surface. It can be seen that the durability is clearly improved.

That is, it can be made much smaller than an exponential horn connected to a vibrator in the related art, and unlike a humidifier that requires a high ultrasonic frequency above a certain level, an arbitrary frequency range can be obtained. Since it is possible to obtain the required atomized particle size by driving with, it is possible to obtain an ultrasonic atomizer that is extremely small and suitable for sterilizing and disinfecting hands. It is possible to obtain an ultrasonic atomizer having improved corrosion resistance and abrasion resistance, and further higher durability and reliability. In addition, aluminum alloy is often used as the material for the ultrasonic wave radiation surface, and alumite treatment is a simple and reliable anti-corrosion treatment for aluminum alloys that is extremely resistant to corrosion and abrasion.

[0012]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway front view showing the overall schematic configuration of an embodiment of the present invention when applied to a device for hand sterilization. In FIG. 1, the front surface (front side) is partially opened. In the body case 13, a bolted Langevin-type transducer 14 is pressed into contact with each tip of a plurality of support bodies 15 protruding inward through the upper side surface of the body case and supported in a suspended state. There is. The bolted Langevin-type vibrator 14 includes two annular piezoelectric elements 14c and 14d between the radiation metal block 14a and the rear metal block 14b, and the bolt 14e to the radiation metal block 14a and each piezoelectric element. 14c and 14d are inserted and screwed into the screw holes of the rear metal block 14b, and the bolts 14e are tightened to form an integrated structure. The piezoelectric elements 14c and 14d respectively have negative and positive electrodes. Plates 14f and 14g are attached. This bolted Langevin type vibrator 14 is an ultrasonic cleaning machine or an ultrasonic cleaning machine in which the piezoelectric elements 14c and 14d have a tensile stress strength weaker than the compressive stress strength so that the bolt 14e gives a tensile stress to input a large power. It is used as an ultrasonic wave oscillation source for equipment such as sound wave processing machines. The figure shows an example of using a commercially available ultrasonic cleaning machine at a low price. In this vibrator 14, the radiating metal block 14a has a sequential diameter toward the leading radiating metal surface 14h. Has an expanded shape with a large diameter and has an atomizing and diffusing effect, and is supported in a hanging state with the radiating metal surface 14h facing downward. The radiating metal block 14a is anodized (anodized film or film) by, for example, a chromic acid method. As an embodiment of the chromic acid method according to the present invention, the radiant metal block 14a is put into a 5% chromic anhydride solution as an electrolytic solution, the electrolysis voltage is raised stepwise, and finally it is set to 50 V, followed by a treatment for 20 minutes. Reasoned. Further, the alumite treatment of the present invention does not occur only on the radiating metal block 14a, but may be performed on the entire surface of the radiating metal block 14a and the rear metal block 14b without causing any inconvenience. In addition, the present invention is not limited to the bolted Langevin type vibrator, and other high power ultrasonic vibrators such as a metal magnetostrictive vibrator and a ferrite vibrator can be used without causing any inconvenience.

A mesh metal plate 16 is joined to the radiating metal surface 14 h of the radiating metal block 14 a which is the lower end surface of the vibrator 14. As shown in FIG. 2, the mesh-shaped metal plate 16 has an outer peripheral portion and a central portion excluding each formed portion of the liquid introducing portion 16a from four portions at equal intervals on the outer peripheral portion, and an adhesive agent is applied to the outer peripheral portion. It is attached to the radiating metal surface 14h. The adhesive portion 16b of the mesh-shaped metal plate 16 is not limited to the position shown in the drawing, but at least a part of the adhesive portion 16b may be discontinuously provided instead of being fixed.

Further, the four liquid supply nozzles 17 for supplying the disinfecting liquid to the mesh metal plate 16 are provided with the liquid supply ports at the tips thereof above the liquid introducing portions 16 a of the mesh metal plate 16. It is pierced and fixed to the body case 13 so as to slide. Disinfecting liquid in a liquid storage tank (not shown) is supplied to each of the liquid supply nozzles 17 through a tube 19 by driving a liquid supply pump 18, and each of the mesh metal plates 16 is introduced from a liquid supply port at each tip. It is dripped on each part 16a. On the other hand, in the vibrator 14, vibration generated by supplying a voltage of a predetermined frequency from the oscillator 20 to the piezoelectric elements 14d and 14c through the respective positive and negative electrode plates 14g and 14f causes mechanical contact to both metal blocks 14a and 14c. Resonance occurs due to the standing wave that is transmitted to 14b and is generated thereby. Although not shown in the figure, a switching photoelectric sensor for detecting that the inside of the body case 13 has been put in through the opening of the body case 13 is arranged in the lower part of the front surface of the body case 13 in a non-contact manner.

Next, the operation of the above embodiment will be described. When the hand is put into the case 13 through the front opening of the case 13 to disinfect the hand, the photoelectric sensor detects the contactlessly, and the liquid supply pump 18 and the oscillator 20 are both powered and driven. The vibrator 14 converts electric energy of a predetermined frequency supplied from the oscillator into mechanical vibration energy, and the vibrator 14 excites the mesh metal plate 16 to cause flexural vibration. The disinfectant solution is dropped from each solution supply nozzle 17 onto each solution introducing portion 16a of the flexurally vibrating mesh-like metal plate 16 as shown by the broken line in FIG.

The disinfecting liquid dropped on each of the liquid introducing portions 16a is capillary-shaped in the entire gap between the radiating metal surface 14h of the mesh-shaped metal plate 16 excluding the adhesive portion 16b and the mesh-shaped metal plate 16. And is held in a state of being accumulated in the mesh holes of the mesh metal plate 16. When ultrasonic waves are radiated from the radiating metal surface 14h of the vibrator 14 to the disinfectant solution, atomized droplets of the disinfectant solution are sprayed from almost the entire mesh plate 16. That is, the mesh metal plate 16 bonded and fixed to the radiating metal surface 14h acts to obtain the atomizing function. The atomized disinfectant solution is applied so as to moisten the entire hand contained in the main body case 13, and the hand is sterilized and disinfected instantly. Experimental results show that the vibrator 14 is supplied with alternating power of 30 W at a frequency of 40 KHz, and a disinfectant solution is dropped on one solution introduction part 16a of the mesh metal plate 16 having a mesh hole diameter of 500 μm. , 0. An atomization rate of 6 cc / sec could be obtained.

Then, when the atomized disinfectant solution is sufficiently attached to the hand, if the hand is taken out from the main body case 13, the photoelectric sensor detects it and the driving of the pump 18 and the oscillator 20 is stopped, and the disinfectant solution is removed. Stops spraying. Therefore, every time a hand is put into the main body case 13, only an appropriate amount of the disinfectant solution is automatically produced, which is economical, and an appropriate amount of the disinfectant solution adheres to the hand as a droplet, so that the hand wipe can be removed. There is no need to use it, and there is no fear of secondary infection.

In the embodiments of the present invention, the alumite treatment is taken as an example of the anticorrosion treatment, but a means such as plating or coating may be used. For example, when plating is applied, chrome plating, nickel plating, etc. are effective for corrosion resistance and rust prevention. Further, when the coating is applied, the same effect as described above can be obtained by using an aluminum hollow coated with glass or by applying a fluororesin coating.

[0019]

[Effect of device]

 The present invention makes it possible to make the size much smaller than the conventional exponential horn connected to a vibrator, and unlike an humidifier that requires a certain ultrasonic frequency higher than a certain level, it can be used in any frequency range. Since it is possible to obtain the required atomized particle size by driving with, it is possible to obtain an ultrasonic atomizing device that is extremely small and suitable for sterilizing and disinfecting hands, and the anticorrosion treatment makes it extremely resistant to corrosion. And the abrasion resistance are improved, and it is possible to obtain an ultrasonic atomizing device with higher durability and reliability. In addition, aluminum alloy is often used as the material for the ultrasonic wave radiation surface, and alumite treatment as a corrosion prevention treatment for aluminum alloy is easy and reliable in terms of remarkable corrosion resistance and abrasion resistance.

[Submission date] July 11, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ultrasonic vibrating device and an atomizing device particularly suitable for atomizing a disinfecting solution for sterilizing and disinfecting hands mainly in hospitals and clinics.

[0002]

[Prior art]

 In recent years, nosocomial infections in hospitals and clinics have become a social problem. To prevent this nosocomial infection, for example, alcohol is automatically sprayed with a disinfectant solution containing 0.2% benzalkonium chloride. There is a demand for a device that can sterilize and disinfect hands and fingers and that does not require the use of hand wipes to prevent secondary infection. Therefore, it is possible to sterilize the hand by atomizing the disinfectant solution and spraying it so that an appropriate amount of the disinfectant solution is instantly applied to the entire hand so that it does not require the use of hand towels.

At present, means for utilizing ultrasonic waves to atomize a liquid are generally adopted. The reason is that the atomization amount and atomization particle size have the advantage that they can be independently controlled by varying the power supplied to the ultrasonic transducer and the ultrasonic frequency. As this ultrasonic vibration device, the one used in the frequency band of 800 KHz to 3 MHz is most frequently used, and the typical one is the ultrasonic humidifier. This ultrasonic humidifier has the advantage that it does not have the various drawbacks of the previous evaporation type and rotary atomization type atomizers, but it makes the ultrasonic transducer directly contact the liquid to be atomized. Therefore, there is a drawback that the ions contained in water combine with carbon dioxide in the air to produce a white powder compound.

There is a medical humidifier as shown in FIG. 3 that solves the drawbacks of the humidifier. This humidifier is attached to the bottom opening of the water tank 1 with the fixing screw 4 via the support rubber 3 in a state where the ultrasonic transducer 2 is in contact with the water 5 in the water tank 1, and should be atomized. The liquid 6 is contained in the atomization chamber 8 in a state of being isolated from the water 5 by a thin permeable membrane 7 formed by processing a corrosion resistant plate such as a stainless plate or a polyester film. Therefore, since the sound wave from the ultrasonic oscillator 2 is not directly applied to the liquid 6 to be atomized but is propagated through water and transmitted, there is no drawback that the above-mentioned white powder compound is generated. Then, the droplets of the atomized liquid 6 are sprayed through the discharge pipe 10 by the air sent from the blower pipe 9 to the atomization chamber 8.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned medical humidifier requires a compressor or the like for sending air to the atomizing chamber 8 through the blower pipe 9, and the entire device becomes large in size, which is not suitable for installation in a hospital toilet or the like to prevent nosocomial infection. Not only that, but because the humidifier structurally requires a high ultrasonic frequency above a certain level, the atomized particle size is too small for the above-mentioned hand disinfection, and If the water 5 for sound wave propagation is lost, it will generate heat and be damaged, which is a safety problem.

By the way, in order to obtain droplets having an atomized particle size of 30 μm to 120 μm, which is suitable for hand disinfection, it is necessary to drive the ultrasonic transducer in the frequency range of 10 KHz to 100 KHz. As shown in FIG. 4, such an ultrasonic vibration device has a configuration in which a bolt-tightened vibrator 11 such as a Langevin type vibrator or a magnetostrictive vibrator and an exponential horn 12 are combined. The explosive horn 12 is adapted to obtain an atomizing function. However, since the atomized droplets are concentrated at approximately one point by the exponential horn 12, it is suitable for applications such as combustion burners, but not suitable for applications such as atomizers. It cannot be used for disinfection. Further, since the bolt-tightened vibrator 11 is combined with the relatively long exponential horn 12, the shape becomes large and the bolt-tightened vibrator 11 itself becomes expensive.

Therefore, as an ultrasonic vibration device excluding these drawbacks, a medium diffusion such as a mesh metal plate or a perforated plate is spread on an ultrasonic wave emitting surface of a bolted type vibrator such as a Langevin type vibrator or a magnetostrictive vibrator. There is an atomizing device (a patent application filed in 1993 No. 68328 filed earlier) in which a medium supply system is provided so as to guide an atomizing medium (disinfectant solution) to a part of the medium diffusing section. . However, in the case of these bolted Langevin type oscillators, most of the material of the ultrasonic wave emitting surface is aluminum alloy, and the structure that atomizes by directly dropping the disinfecting liquid, which is an atomizing medium, on it. Corrosion of the metal surface by the disinfectant was unavoidable. Further, due to ultrasonic vibration, wear due to contact was unavoidable at the location where the ultrasonic radiation surface and the medium diffusion portion were bonded and fixed.

[0008] Therefore, it is a technical object of the present invention to provide a highly reliable ultrasonic atomizer that is particularly suitable for atomizing a disinfecting solution for sterilizing hands.

[0009]

[Means for Solving the Problems]

 According to the present invention, an ultrasonic vibration device is configured as follows as a technical means for achieving the above-mentioned problems. That is, the atomizing medium supplied to a part of the ultrasonic wave emitting surface of the high-power ultrasonic transducer that is driven by being supplied with electric power of a predetermined frequency from the oscillator spreads over the entire emitting surface due to the capillary phenomenon. In the ultrasonic vibrating device provided with the medium diffusing portion having a shape to be held, at least the ultrasonic wave emitting surface of the high power ultrasonic vibrator is subjected to anticorrosion treatment. Further, in the atomizing device in which the medium supply system is arranged in the ultrasonic vibration device so as to guide the atomizing medium to a part of the medium diffusing section, at least the ultrasonic wave emitting surface of the ultrasonic transducer for high power is provided. It was anticorrosion treated. Then, at least the ultrasonic wave emitting surface was made of aluminum alloy and subjected to alumite treatment as anticorrosion treatment.

[0010]

[Action]

 Bolt-tightened Langevin-type oscillators (Type A) with anodized metal on the radiating metal surface and untreated bolt-tightened Langevin-type oscillators (Type B) were manufactured. An ultrasonic vibration device was produced by using the above. Then, an atomization test was performed using each ultrasonic vibration device. The atomization conditions are described below. While supplying 30 W of alternating power with a frequency of 40 KHz to the vibrator, a disinfectant solution was dropped on the solution introduction part of the mesh metal plate with a mesh hole diameter of 500 μm. One cycle consists of atomization for 2 seconds (atomization amount of 3 cc) and stop for 25 seconds, and this was repeated 100,000 cycles. After that, the appearance check of the radiated metal surface and the atomization efficiency were compared. As a result, the type A radiating metal surface had no particular change in appearance other than some scratches, and the atomization efficiency was unchanged from the initial level (0.6 cc / sec). On the other hand, on the radiating metal surface of type B, peeling of the surface layer, which is considered to be caused by corrosion and friction due to vibration with the mesh-shaped metal plate, was observed. The atomization efficiency was also reduced to 1/3 of the initial level (0.2 cc / sec). As can be seen in this atomization test, compared to a bolted Langevin type vibrator whose radiation metal surface is untreated, an ultrasonic vibration device assembled using a bolted Langevin type vibrator with an alumite treatment on the radiation metal surface It can be seen that the durability is clearly improved.

That is, it can be made much smaller than an exponential horn connected to a vibrator in the related art, and unlike a humidifier that requires a high ultrasonic frequency above a certain level, an arbitrary frequency range can be obtained. Since it is possible to obtain the required atomized particle size by driving with, it is possible to obtain an atomizing device that is extremely small and suitable for sterilizing and disinfecting hands, and the anticorrosion treatment makes it extremely resistant to corrosion. It is possible to obtain an ultrasonic vibration device having improved abrasion resistance and higher durability and reliability. In addition, aluminum alloy is often used as the material for the ultrasonic wave emitting surface, and alumite treatment is a reliable and easy-to-use corrosion resistance and abrasion resistance for aluminum alloys.

[0012]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway front view showing the overall schematic configuration of an embodiment of the present invention when applied to a device for hand sterilization. In FIG. 1, the front surface (front side) is partially opened. In the body case 13, a bolted Langevin-type transducer 14 is pressed into contact with each tip of a plurality of support bodies 15 protruding inward through the upper side surface of the body case and supported in a suspended state. There is. The bolted Langevin-type vibrator 14 includes two annular piezoelectric elements 14c and 14d between the radiation metal block 14a and the rear metal block 14b, and the bolt 14e to the radiation metal block 14a and each piezoelectric element. 14c and 14d are inserted and screwed into the screw holes of the rear metal block 14b, and the bolts 14e are tightened to form an integrated structure. The piezoelectric elements 14c and 14d respectively have negative and positive electrodes. Plates 14f and 14g are attached. This bolted Langevin type vibrator 14 is an ultrasonic cleaning machine or an ultrasonic cleaning machine in which the piezoelectric elements 14c and 14d have a tensile stress strength weaker than the compressive stress strength so that the bolt 14e gives a tensile stress to input a large power. It is used as an ultrasonic wave oscillation source for equipment such as sound wave processing machines. The figure shows an example of using a commercially available ultrasonic cleaning machine at a low price. In this vibrator 14, the radiating metal block 14a has a sequential diameter toward the leading radiating metal surface 14h. Has an expanded shape with a large diameter and has an atomizing and diffusing effect, and is supported in a hanging state with the radiating metal surface 14h facing downward. The radiating metal block 14a is anodized (anodized film or film) by, for example, a chromic acid method. As an embodiment of the chromic acid method according to the present invention, the radiant metal block 14a is put into a 5% chromic anhydride solution as an electrolytic solution, the electrolysis voltage is raised stepwise, and finally it is set to 50 V, followed by a treatment for 20 minutes. Reasoned. Further, the alumite treatment of the present invention does not occur only on the radiating metal block 14a, but may be performed on the entire surface of the radiating metal block 14a and the rear metal block 14b without causing any inconvenience. In addition, the present invention is not limited to the bolted Langevin type vibrator, and other high power ultrasonic vibrators such as a metal magnetostrictive vibrator and a ferrite vibrator can be used without causing any inconvenience.

A mesh metal plate 16 is joined to the radiating metal surface 14 h of the radiating metal block 14 a which is the lower end surface of the vibrator 14. As shown in FIG. 2, the mesh-shaped metal plate 16 has an outer peripheral portion and a central portion excluding each formed portion of the liquid introducing portion 16a from four portions at equal intervals on the outer peripheral portion, and an adhesive agent is applied to the outer peripheral portion. It is attached to the radiating metal surface 14h. The adhesive portion 16b of the mesh-shaped metal plate 16 is not limited to the position shown in the drawing, but at least a part of the adhesive portion 16b may be discontinuously provided instead of being fixed.

Further, the four liquid supply nozzles 17 for supplying the disinfecting liquid to the mesh metal plate 16 are provided with the liquid supply ports at the tips thereof above the liquid introducing portions 16 a of the mesh metal plate 16. It is pierced and fixed to the body case 13 so as to slide. Disinfecting liquid in a liquid storage tank (not shown) is supplied to each of the liquid supply nozzles 17 through a tube 19 by driving a liquid supply pump 18, and each of the mesh metal plates 16 is introduced from a liquid supply port at each tip. It is dripped on each part 16a. On the other hand, in the vibrator 14, vibration generated by supplying a voltage of a predetermined frequency from the oscillator 20 to the piezoelectric elements 14d and 14c through the respective positive and negative electrode plates 14g and 14f causes mechanical contact to both metal blocks 14a and 14c. Resonance occurs due to the standing wave that is transmitted to 14b and is generated thereby. Although not shown in the figure, a switching photoelectric sensor for detecting that the inside of the body case 13 has been put in through the opening of the body case 13 is arranged in the lower part of the front surface of the body case 13 in a non-contact manner.

Next, the operation of the above embodiment will be described. When the hand is put into the case 13 through the front opening of the case 13 to disinfect the hand, the photoelectric sensor detects the contactlessly, and the liquid supply pump 18 and the oscillator 20 are both powered and driven. The vibrator 14 converts electric energy of a predetermined frequency supplied from the oscillator into mechanical vibration energy, and the vibrator 14 excites the mesh metal plate 16 to cause flexural vibration. The disinfectant solution is dropped from each solution supply nozzle 17 onto each solution introducing portion 16a of the flexurally vibrating mesh-like metal plate 16 as shown by the broken line in FIG.

The disinfecting liquid dropped on each of the liquid introducing portions 16a is capillary-shaped in the entire gap between the radiating metal surface 14h of the mesh-shaped metal plate 16 excluding the adhesive portion 16b and the mesh-shaped metal plate 16. And is held in a state of being accumulated in the mesh holes of the mesh metal plate 16. When ultrasonic waves are radiated from the radiating metal surface 14h of the vibrator 14 to the disinfectant solution, atomized droplets of the disinfectant solution are sprayed from almost the entire mesh plate 16. That is, the mesh metal plate 16 bonded and fixed to the radiating metal surface 14h acts to obtain the atomizing function. The atomized disinfectant solution is applied so as to moisten the entire hand contained in the main body case 13, and the hand is sterilized and disinfected instantly. Experimental results show that the vibrator 14 is supplied with alternating power of 30 W at a frequency of 40 KHz, and a disinfectant solution is dropped on one solution introduction part 16a of the mesh metal plate 16 having a mesh hole diameter of 500 μm. , 0. An atomization rate of 6 cc / sec could be obtained.

Then, when the atomized disinfectant solution is sufficiently attached to the hand, if the hand is taken out from the main body case 13, the photoelectric sensor detects it and the driving of the pump 18 and the oscillator 20 is stopped, and the disinfectant solution is removed. Stops spraying. Therefore, every time a hand is put into the main body case 13, only an appropriate amount of the disinfectant solution is automatically produced, which is economical, and an appropriate amount of the disinfectant solution adheres to the hand as a droplet, so that the hand wipe can be removed. There is no need to use it, and there is no fear of secondary infection.

In the embodiments of the present invention, the alumite treatment is taken as an example of the anticorrosion treatment, but a means such as plating or coating may be used. For example, when plating is applied, chrome plating, nickel plating, etc. are effective for corrosion resistance and rust prevention. Further, when the coating is applied, the same effect as described above can be obtained by using an aluminum hollow coated with glass or by applying a fluororesin coating.

[0019]

[Effect of device]

 The present invention makes it possible to make the size much smaller than the conventional exponential horn connected to a vibrator, and unlike an humidifier that requires a certain ultrasonic frequency higher than a certain level, it can be used in any frequency range. Since it is possible to obtain the required atomized particle size by driving with, it is possible to obtain an atomizing device that is extremely small and suitable for sterilizing and disinfecting hands, and the anticorrosion treatment makes it extremely resistant to corrosion. It is possible to obtain an ultrasonic vibration device having improved abrasion resistance and higher durability and reliability. In addition, aluminum alloy is often used as the material for the ultrasonic wave radiation surface, and alumite treatment is a simple and reliable anti-corrosion treatment for aluminum alloys that is extremely resistant to corrosion and abrasion.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a bottom view of the main part of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional medical humidifier.

FIG. 4 is a schematic side view of a conventional ultrasonic atomizing device.

[Explanation of symbols]

 14 ... Bolting Langevin type ultrasonic transducer 14h ... Radiating metal surface 16 ... Mesh metal plate 16a ... Liquid introducing part of mesh metal plate 16b ... Adhesive part of mesh metal plate 17 ... Liquid supply nozzle 20 ... Oscillator

[Procedure amendment]

[Submission date] July 11, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of device] Ultrasonic vibrating device and atomizing device

[Scope of utility model registration request]

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a bottom view of the main part of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional medical humidifier.

FIG. 4 is a schematic side view of a conventional ultrasonic atomizing device.

[Explanation of Codes] 14 ... Bolt tightening Langevin type ultrasonic transducer 14h ... Radiating metal surface 16 ... Mesh metal plate 16a ... Liquid introducing part of mesh metal plate 16b ... Mesh shape Bonded part of metal plate 17 ... Liquid supply nozzle 20 ... Oscillator

Claims (2)

[Scope of utility model registration request] 1. An ultrasonic wave emitting surface of a high-power ultrasonic transducer which is driven by being supplied with electric power of a predetermined frequency from an oscillator, and an atomizing medium which is supplied to a part of the ultrasonic wave emitting surface is entirely covered by the capillary phenomenon. In an ultrasonic atomizing device, which is provided with a medium diffusing section having a shape that is expanded and held, and in which a medium supply system is arranged to guide the atomizing medium to a part of the medium diffusing section,
An ultrasonic atomizing device, wherein at least an ultrasonic wave emitting surface of the high-power ultrasonic vibrator is subjected to anticorrosion treatment. 2. The ultrasonic atomizer according to claim 1, wherein an aluminum alloy is used for at least the ultrasonic wave emitting surface, and an alumite treatment is applied as a corrosion preventing treatment.