WO2013161986A1 - 超音波霧化装置 - Google Patents

超音波霧化装置 Download PDF

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Publication number
WO2013161986A1
WO2013161986A1 PCT/JP2013/062346 JP2013062346W WO2013161986A1 WO 2013161986 A1 WO2013161986 A1 WO 2013161986A1 JP 2013062346 W JP2013062346 W JP 2013062346W WO 2013161986 A1 WO2013161986 A1 WO 2013161986A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
liquid
chemical
ultrasonic
ultrasonic atomizer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/062346
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English (en)
French (fr)
Japanese (ja)
Inventor
浩之 河野
哲男 原田
大介 高畠
一之 植田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to US14/396,445 priority Critical patent/US20150129681A1/en
Priority to CN201380022041.4A priority patent/CN104271256A/zh
Priority to ES13781836T priority patent/ES2759200T3/es
Priority to EP13781836.5A priority patent/EP2842641B1/en
Publication of WO2013161986A1 publication Critical patent/WO2013161986A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices
    • B05B17/0646—Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/20—Poisoning, narcotising, or burning insects
    • A01M1/2022—Poisoning or narcotising insects by vaporising an insecticide
    • A01M1/2027—Poisoning or narcotising insects by vaporising an insecticide without heating
    • A01M1/2044—Holders or dispensers for liquid insecticide, e.g. using wicks
    • A01M1/205—Holders or dispensers for liquid insecticide, e.g. using wicks using vibrations, e.g. ultrasonic or piezoelectric atomizers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0653—Details
    • B05B17/0676—Feeding means
    • B05B17/0684—Wicks or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/13—Dispensing or storing means for active compounds
    • A61L2209/132—Piezo or ultrasonic elements for dispensing

Definitions

  • the present invention relates to an ultrasonic atomizer that atomizes a chemical solution by ultrasonic vibration.
  • An ultrasonic atomizer is known as means for spraying a liquid such as a chemical solution containing an active ingredient into an indoor or outdoor space.
  • the ultrasonic atomizer has a piezoelectric vibrator that generates ultrasonic vibration when energized, and a vibration plate that is fixed to the piezoelectric vibrator and has a large number of micropores, supplying liquid to the micropores, The liquid is atomized by generating ultrasonic vibration in the diaphragm by the vibration of the piezoelectric vibrator.
  • the atomization apparatus of Patent Document 1 includes a pressurizing chamber filled with a liquid, a nozzle plate provided with a plurality of nozzles facing the pressurizing chamber, and an electric vibrator that energizes the nozzle plate and excites flexural vibration.
  • the nozzle plate is provided with a protrusion, and the protrusion is provided with a fine hole.
  • the micropores are in direct contact with the liquid and are oriented in the lateral direction (direction perpendicular to the direction of gravity). Thereby, the atomization apparatus of patent document 1 sprays a liquid to a horizontal direction.
  • the sprayer of Patent Document 2 includes a vibrating membrane for spraying a liquid and a vibrating portion that vibrates the membrane.
  • the membrane includes a first bending portion and a second bending portion having a curvature different from that of the first bending portion, and is sprayed with a liquid in contact with the membrane by being vibrated by the vibration portion.
  • the sprayer of patent document 2 sprays a liquid below (gravity direction).
  • the ultrasonic atomization device of Patent Document 3 vibrates a piezoelectric vibrator by driving a complex composed of a piezoelectric vibrator and a vibrator, and the vibration propagates to the vibrator.
  • the liquid supplied to the lower surface of the vibrating body that comes into contact with the liquid retaining agent is atomized through a hole formed in the vibrating body as the vibrating body vibrates.
  • the piezo nebulizer of Patent Document 4 uses a chemical solution having a viscosity of 5 mPa ⁇ s (20 ° C.) to 30 mPa ⁇ s (20 ° C.).
  • JP 58-216753 (December 16, 1983) US Pat. No. 7,472,701 (registered January 6, 2009) Japanese Laid-Open Patent Publication No. 6-7721 (published January 18, 1994) JP 2009-269893 A (published on November 19, 2009)
  • Patent Documents 1 to 4 have the following problems.
  • the atomizing device of Patent Document 1 since the atomizing device of Patent Document 1 has a spray port that faces sideways, the liquid level decreases as the remaining amount decreases. Therefore, in the spray device of Patent Document 1, when the liquid level is lower than the nozzle, the liquid is not sprayed outside the device.
  • both the atomization device of Patent Document 1 and the sprayer of Patent Document 2 are difficult in the first place to stably and continuously spray the liquid to the outside of the device.
  • the ultrasonic atomizer of Patent Document 3 sprays the liquid that has permeated the liquid retaining agent upward (in the direction opposite to gravity) through a vibrating body that contacts the liquid retaining agent.
  • it is difficult to obtain a sufficient spray height because the central portion of the vibrating body is curved. For this reason, since the diffusibility of the sprayed liquid cannot be obtained sufficiently, it is difficult to spread the effects (sterilization, insecticide, etc.) obtained by spraying the liquid over a wide range.
  • the piezo-type sprayer of Patent Document 4 uses a chemical solution of 5 mPa ⁇ s (20 ° C.) to 30 mPa ⁇ s (20 ° C.), and the vibrator is flat. It cannot be said that stability is sufficient.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an ultrasonic atomizer capable of enhancing the diffusibility of the chemical liquid to be sprayed.
  • An ultrasonic atomizing apparatus is an ultrasonic atomizing apparatus that atomizes and sprays a chemical solution in order to solve the above-described problem, and includes a liquid absorption core that absorbs the chemical solution from the chemical solution storage container, and a thickness.
  • a vibration plate that has a number of fine holes penetrating in the vertical direction and that atomizes and sprays the chemical liquid by vibration of a piezoelectric vibrator that generates ultrasonic vibration when energized, and the vibration plate passes through the liquid absorption core.
  • the ultrasonic atomizer according to the present invention includes the liquid absorption core that absorbs the chemical liquid from the chemical liquid storage container. Therefore, one end of the liquid absorption core is immersed in the chemical liquid in the chemical liquid storage container, and the other end of the liquid absorption core is directed upward (opposite to gravity), so that the chemical liquid is atomized upward by the vibration of the diaphragm. It is possible to spray.
  • the diaphragm has a frustum-shaped convex portion to which the chemical liquid is supplied via the liquid absorption core.
  • the ultrasonic atomizer which concerns on this invention can make the spray height of a chemical
  • the ultrasonic atomizer according to the present invention as a chemical solution, at least an organic solvent and an active ingredient are mixed, and the viscosity is 1.7 mPa ⁇ s (20 ° C.) to 5.0 mPa ⁇ s (20 ° C.).
  • a chemical is used as a chemical solution.
  • the ultrasonic atomizer according to the present invention increases the diffusibility of the chemical liquid by natural transpiration due to the organic solvent, and the combination of the diaphragm having the frustum-shaped convex portion and the viscosity range of the chemical liquid. Further, the diffusibility of the chemical solution can be improved by improving the spray amount and the spray height of the chemical solution.
  • An ultrasonic atomizing apparatus is an ultrasonic atomizing apparatus that atomizes and sprays a liquid in order to solve the above-described problem, and includes a liquid absorption core that absorbs the liquid to be atomized and a plan view.
  • a ring-shaped piezoelectric vibrator that generates ultrasonic vibration in a radial direction when energized, and a diaphragm fixed to the piezoelectric vibrator so as to close a central opening of the piezoelectric vibrator
  • the center of the opening of the piezoelectric vibrator substantially coincides with the center of the piezoelectric vibrator and has a frustoconical convex portion protruding in the spraying direction, and at least the upper base of the convex portion penetrates in the thickness direction. It has a large number of fine holes, and is characterized in that the liquid is supplied to the diaphragm via the liquid absorption core.
  • the diaphragm has the truncated cone-shaped convex portion to which the liquid is supplied via the liquid absorption core.
  • the ultrasonic atomizer which concerns on this invention can make the spray height of a liquid high compared with the liquid spray using the diaphragms, such as the conventional dome shape. Therefore, the ultrasonic atomization apparatus according to the present invention can increase the diffusibility of the liquid around the apparatus itself, and can spread the insecticidal effect over a wide range, for example, when the liquid is an insecticide.
  • the ultrasonic atomizer according to the present invention can have higher durability than the conventional diaphragm because the diaphragm has a frustoconical convex portion. Therefore, the ultrasonic atomization apparatus according to the present invention can reduce the burden on the user such as the trouble of replacing the diaphragm and the replacement cost.
  • the ultrasonic atomizer according to the present invention has a liquid absorption core that absorbs a chemical solution from the chemical solution storage container and a large number of fine holes penetrating in the thickness direction.
  • a vibration plate that atomizes and sprays the chemical liquid by the vibration of the generated piezoelectric vibrator, and the vibration plate has a frustum-shaped convex portion to which the chemical liquid is supplied through the liquid absorption core.
  • the chemical solution a chemical solution having a viscosity of 1.7 mPa ⁇ s (20 ° C.) to 5.0 mPa ⁇ s (20 ° C.) in which at least an organic solvent and an active ingredient are mixed is used.
  • the ultrasonic atomizing device has a liquid absorption core that absorbs the liquid to be atomized and a ring shape in plan view, and a piezoelectric device that generates ultrasonic vibration in the radial direction when energized.
  • the liquid is supplied to the plate.
  • the ultrasonic atomizer according to the present invention can improve the diffusibility of the chemical liquid to be sprayed.
  • FIG. 1 is a schematic diagram of an ultrasonic atomizer 1.
  • FIG. 2 is an enlarged view of the atomization unit 30 of the ultrasonic atomizer 1.
  • the ultrasonic atomizer 1 is an apparatus that atomizes a chemical liquid by ultrasonic vibration, and includes an apparatus main body 10 having an atomizing unit 30 and a chemical liquid container (chemical liquid storage container) 20 accommodated in the apparatus main body 10.
  • a chemical liquid container chemical liquid storage container
  • the apparatus main body 10 accommodates the chemical solution container 20 and includes an atomizing unit 30.
  • the chemical solution container 20 may be detachably accommodated in the apparatus main body 10.
  • the atomizing unit 30 includes a piezoelectric vibrator 31 that generates ultrasonic vibration when energized, a vibration plate 32 that atomizes a chemical liquid by vibration of the piezoelectric vibrator 31, an upper surface of the piezoelectric vibrator 31, A pair of elastic rings 33 as annular elastic members attached to the lower surface of the vibration plate 32 and the piezoelectric vibrator 31 and the vibration plate 32 are elastically sandwiched and held via the pair of elastic rings 33.
  • a casing 34 is shown in FIG. 2, the atomizing unit 30.
  • the piezoelectric vibrator 31 is made of a circular thin plate-shaped piezoelectric ceramic having an opening 35 formed at the center.
  • the piezoelectric vibrator 31 is polarized in the thickness direction, and generates ultrasonic vibrations in the radial direction by applying a high-frequency voltage to electrodes (not shown) formed on both surfaces.
  • the piezoelectric vibrator 31 has, for example, a thickness of 0.1 mm to 4.0 mm and an outer diameter of 6 mm to 60 mm.
  • the piezoelectric vibrator 31 has a ring shape when seen in a plan view, and has an opening (center opening) formed at the center.
  • the piezoelectric vibrator 31 may be a piezoelectric vibrator having an oscillation frequency of 30 kHz to 500 kHz.
  • the diaphragm 32 is a circular thin plate made of nickel, nickel alloy, or iron alloy, for example.
  • the diaphragm 32 is bonded (fixed) concentrically or substantially concentrically (substantially coincides) with the piezoelectric vibrator 31 with respect to the lower surface of the piezoelectric vibrator 31 in FIG. 1 while covering the opening 35 of the piezoelectric vibrator 31.
  • the diaphragm 32 has a thickness of 0.02 mm to 2.0 mm and an outer diameter of 6 mm to 60 mm.
  • the outer diameter of the diaphragm 32 is appropriately selected according to the size of the piezoelectric vibrator 31 so as to be larger than the inner diameter dimension of the opening 35 of the piezoelectric vibrator 31.
  • a large number of fine holes 36 penetrating in the thickness direction are formed in a portion of the diaphragm 32 facing the opening 35 of the piezoelectric vibrator 31.
  • the hole diameter of the fine hole 36 is preferably 3 ⁇ m to 150 ⁇ m. The diaphragm will be described later with reference to FIG.
  • the fine hole 36 is formed only on the upper bottom of the convex portion 37 of the diaphragm 32.
  • the diaphragm according to the present embodiment may have fine holes 36 formed on the entire surface of the diaphragm.
  • the ultrasonic atomizing device 1 a chemical solution is supplied to the fine hole 36 through the liquid absorption core 22 (described later), the piezoelectric vibrator 31 generates ultrasonic vibrations when energized, and the vibration plate 32 is driven by the vibration of the piezoelectric vibrators.
  • the chemical liquid is atomized by the ultrasonic vibration generated in
  • a pair of elastic rings 33 are provided.
  • the pair of elastic rings 33 are elastically deformed between the casing 34 and the upper surface of the piezoelectric vibrator 31 and between the casing 34 and the lower surface of the diaphragm 32, respectively. Concentrically, they are in contact with the upper and lower surfaces.
  • the elastic ring 33 an O-ring having a wire diameter of 0.5 mm to 3 mm is preferably used.
  • the hardness of the elastic ring 33 is preferably 20 IRHD to 90 IRHD.
  • the elastic ring 33 in contact with the upper surface of the piezoelectric vibrator 31 and the elastic ring 33 in contact with the lower surface of the diaphragm 32 have an average diameter [(inner diameter + outer diameter) / 2], wire diameter, and hardness. Are preferably the same, and the average diameter is particularly preferable.
  • Examples of the material of the elastic ring 33 include nitrile rubber, fluorine rubber, ethylene propylene rubber, silicone rubber, acrylic rubber, hydrogenated nitrile rubber, and the like.
  • the elastic ring 33 may be a ring having a cross-sectional shape of an ellipse, a quadrangle, a triangle, a rhombus or the like instead of the O-ring, and may be a D-shaped, X-shaped, T-shaped ring or the like. Also good. Further, the elastic ring 33 does not have to be completely connected and continuous in the circumferential direction, and may have one cut in the circumferential direction or may have several intermittent cuts in the circumferential direction. Good.
  • the circular thin plate-like diaphragm 32 completely covers the opening 35 of the piezoelectric vibrator 31
  • a rectangular thin plate-like diaphragm is used, and this diaphragm is used as the opening 35 of the piezoelectric vibrator 31. It may be spanned so that both ends of the diaphragm are fixed to one surface of the piezoelectric vibrator 31.
  • the atomization part 30 may use a well-known piezoelectric spray part other than the thing of said structure, and may be selected suitably.
  • the chemical liquid container 20 includes a container main body 21 and a liquid absorption core 22 and is detachably accommodated in the apparatus main body 10.
  • the container main body 21 is comprised from the bottomed cylindrical container which has the opening part 24 in the upper part, for example.
  • a chemical solution is placed in the container body 21.
  • Examples of the material of the container body 21 include glass and synthetic resin.
  • the liquid absorbent core 22 is, for example, a cylindrical member having a diameter of 2 mm to 6 mm made of a nonwoven fabric.
  • the lower side of the liquid absorbent core 22 is immersed in the chemical liquid in the container body 21, and the chemical liquid can be supplied to the upper side of the liquid absorbent core 22 by capillary action.
  • the liquid absorption core 22 may have a prismatic shape as well as a cylindrical shape, and its shape is arbitrary. Further, the thickness of the liquid absorption core 22 may be a thickness that can be inserted into the opening 35 of the piezoelectric vibrator 31 or the convex portion 37 of the diaphragm 32.
  • Examples of the material of the liquid absorbent core 22 include a porous body having communication holes, a resin body having open cells, or an aggregate of resin fibers.
  • a resin body having open cells made of polyurethane, polyethylene, polyethylene terephthalate, polyvinyl formal, polystyrene, etc., a porous body obtained by compressing and sintering a resin fine particle such as polyethylene, polypropylene, nylon, etc.
  • Examples thereof include an aggregate of resin fibers such as non-woven fabric and the like, and a porous inorganic powder sintered body obtained by compressing and sintering an inorganic powder such as ceramic as a main component, but are not limited thereto. These may be treated with a surfactant.
  • the chemical container 20 is accommodated in the apparatus main body 10 in such a manner that the chemical liquid container 20 is detachably accommodated in the apparatus main body 10 and the liquid absorbent core 22 and the diaphragm 32 are placed in a state where the chemical liquid container 20 is accommodated in the apparatus main body 10.
  • the convex portion 37 (described later) approaches or comes into contact.
  • Examples of the active ingredient include ingredients for insecticidal, sterilizing, aroma and the like.
  • Phenylpyrazole compounds Acetoprole, etiprole, fipronil, vaniliprole, pyriprole, pyrafluprole, etc .; (8) Bt toxin insecticide live spores and produced crystal toxins derived from Bacillus thuringiensis, and mixtures thereof; (9) Hydrazine compounds Chromafenozide, halofenozide, methoxyphenozide, tebufenozide and the like; (10) Organochlorine compound Aldrin, dieldrin, dienochlor, endosulfan, methoxychlor, etc .; (11) Natural insecticide machine oil, nicotine sulfate (nicotine-sulfate); (12) Other insecticides avermectin (avermectin-B), bromopropyrate, buprofezin, chlorphenapyr, cyromazine, D-D (1, roDictin) emame
  • metfurthrin from the viewpoint of components that are easily volatilized and are suitable for controlling pests, metfurthrin, profluthrin, transfluthrin, mepafluthrin, d-teflumethrin, and dimefrin are preferable, and metfurthrin is more preferable. Moreover, these may be used independently and may mix and use 2 or more types. Further, the content of the active ingredient in the chemical solution is not particularly limited and is, for example, a concentration of 0.05 to 10% by mass.
  • organic solvent an organic solvent in which a chemical solution obtained by dissolving an active ingredient in an organic solvent has a viscosity of 1.7 mPa ⁇ s (20 ° C.) to 5.0 mPa ⁇ s (20 ° C.) is used.
  • hydrocarbons such as n-paraffin (C 12 -C 15 ) (Cactus normal paraffin: JX Nippon Oil & Energy Corporation), naphthenic solvent (Exxsol D110: Exxon Mobil), methyl laurate, coconut oil fatty acid
  • esters such as methyl, isopropyl myristate, and methyl oleate
  • alcohols such as 2-methyl-1-propanol
  • glycol ethers such as propylene glycol monomethyl ether.
  • these may be used independently and may mix and use 2 or more types.
  • an antioxidant may be appropriately mixed in the chemical solution within a range in which the above viscosity range is maintained.
  • the chemical liquid may be supplied to the vibration plate 32 as follows, and this will be described with reference to FIG.
  • FIG. 4 is a modification of the ultrasonic atomizer 1.
  • the description is abbreviate
  • the chemical solution container 20 includes a container main body 21, a liquid absorption core 22, and an absorber 23, and is detachably accommodated in the apparatus main body 10.
  • the liquid absorbent core 22 is, for example, a cylindrical member having a diameter of 2 mm to 6 mm made of a nonwoven fabric.
  • the lower side of the liquid absorbent core 22 is immersed in the chemical liquid in the container body 21, and the chemical liquid can be supplied to the upper side of the liquid absorbent core 22 by capillary action.
  • An absorber 23 is attached to the upper side of the liquid absorbent core 22.
  • the absorber 23 is provided integrally with the liquid absorbent core 22 on the upper side of the liquid absorbent core 22. That is, the absorber 23 is attached to and detached from the ultrasonic atomizer 1 together with the chemical container 20 when the chemical container 20 is attached to and detached from the ultrasonic atomizer 1.
  • the absorber 23 is close to or in contact with the convex portion 37 of the diaphragm 32, and supplies the chemical liquid absorbed by the liquid absorbent core 22 to the convex portion 37.
  • the material of the absorber 23 the same material as that of the liquid absorbent core 22 can be used.
  • integrated is used as an expression including the same structure or a state of being integrated.
  • the liquid absorption core 22 and the absorber 23 are fixed to the container main body 21 and are detachably attached from the chemical liquid container 20 (or the container main body 21).
  • the absorber 23 when taking out the chemical
  • the ultrasonic atomization apparatus 1 is less likely to make the spray amount of the chemical liquid unstable due to the blockage and to force the user to replace the vibration plate that requires high cost.
  • liquid absorption core 22 and / or the absorber 23 may be realized by a structure fixed to the ultrasonic atomizer 1 side.
  • FIG. 3A and 3B are schematic views of the diaphragm 32, in which FIG. 3A shows a top view and FIG. 3B shows a cross-sectional view.
  • the diaphragm 32 is made of, for example, a circular thin plate made of nickel, and is joined (fixed) to the lower surface of the piezoelectric vibrator 31 concentrically or substantially concentrically (substantially coincident) with the piezoelectric vibrator 31. ing. Further, the diaphragm 32 has a convex portion 37 protruding (projected) in a truncated cone shape, and the convex portion 37 is formed so that the center of the truncated cone is substantially concentric with the piezoelectric vibrator 31. And as shown to Fig.3 (a) and FIG.3 (b), the several fine hole 36 is formed only in the upper base of the convex-shaped part 37. FIG.
  • the frustum means a three-dimensional figure obtained by removing from a cone a cone that shares a vertex and is similarly reduced.
  • the frustum is a three-dimensional figure surrounded by a cone surface and two parallel planes.
  • a truncated cone made of a cone is called a truncated cone
  • a truncated cone made of a pyramid is called a truncated pyramid
  • a truncated cone made of an n-shaped pyramid is called an “n” truncated pyramid.
  • the convex portion 37 has a truncated cone shape when the upper surface on which the plurality of fine holes 36 are formed is the upper base and the rising surface of the convex portion 37 in the diaphragm 32 is regarded as a cone surface.
  • the liquid absorption core 22 and the absorber 23 are positioned in the part corresponding to the lower bottom which does not exist, and a liquid is supplied to the convex part 37 from the absorber 23.
  • the diameter of the upper base of the truncated cone-shaped convex portion 37 is preferably less than the diameter of the cylindrical liquid absorbent core 22. Although not actually present, it is preferable that the diameter of the bottom of the convex portion 37 is the same as or slightly larger than the diameter of the liquid absorbent core 22. And it is preferable that the diameter of the upper base of the frustum-shaped convex part 37 is 1.0 mm or more and 7.0 mm or less. The diameter of the bottom of the convex portion 37 is preferably 2.2 mm or more and 11.0 mm or less.
  • the height of the convex portion 37 (the distance between the upper base and the lower base) is preferably 0.1 mm or more and 2.0 mm or less.
  • the angle between the bottom of the convex portion 37 and the slope of the convex portion 37 is preferably 45 degrees or less.
  • FIG. 5A and 5B are schematic views of the diaphragm 40, in which FIG. 5A shows a top view and FIG. 5B shows a cross-sectional view.
  • the diaphragm 40 is different from the diaphragm 32 in the following points. That is, in the diaphragm 32, the micro hole 36 is formed only on the upper bottom of the convex portion 37 of the diaphragm 32, whereas in the diaphragm 40, the micro hole 36 is formed in the entire diaphragm 40. ing. In this embodiment, the diaphragm 40 can be used in addition to the diaphragm 32.
  • FIG. 6A and 6B are schematic views of the diaphragm 45, in which FIG. 6A shows a top view and FIG. 6B shows a cross-sectional view.
  • the diaphragm 45 is different from the diaphragm 32 in the following points. That is, the convex portion 37 of the diaphragm 32 has a truncated cone shape, whereas the convex portion 37 of the diaphragm 45 has an octagonal truncated cone shape. In this embodiment, the diaphragm 45 can be used in addition to the diaphragm 32 and the like.
  • the diaphragm 45 may have a plurality of fine holes 36 formed on the side surface of the convex portion 37 or the entire diaphragm 45 including the side surface in addition to the upper bottom.
  • the diaphragm 45 is described as having an octagonal truncated pyramid shape.
  • the diaphragm 45 may be formed in an n-pyramidal frustum shape such as a quadrangular frustum or a 16-pyramid frustum.
  • the diaphragm 32, the diaphragm 40, and the diaphragm 45 are common in that the cross section in the spray direction of the chemical liquid is trapezoidal, and the surface serving as the spray opening of the chemical liquid is a flat surface.
  • the upper base and side surfaces of the frustum-shaped diaphragm 32, diaphragm 40, and diaphragm 45 may not be exactly flat but may be formed with surfaces having some curvature.
  • the diaphragm 50 in which the rising portion of the truncated cone-shaped convex portion 37 is provided in the immediate vicinity of the inner peripheral surface of the piezoelectric vibrator 31 may be used.
  • the organic solvent is obtained from ethanol having a viscosity of 0.59 mPa ⁇ s (20 ° C.) and having a viscosity of 6.12 mPa ⁇ s (20 Ten types of naphthenic acid + paraffin (Exxsol D130) were used.
  • the spray amount indicates the amount of chemical solution per spray, and the greater the spray amount, the greater the effect (sterilization, insecticide, etc.) obtained by spraying.
  • Spray stability is the standard deviation of the stability of the amount of chemicals per spray (no variation). The lower the value, the better the spray stability and the effect obtained by spraying. Shows stability.
  • the spray height (cm) is obtained by visually confirming the spray height with the spray port of the chemical solution on the vibration plate as a reference point.
  • the liquid pool on the upper surface of the diaphragm is ⁇ when the liquid pool does not occur on the upper surface of the diaphragm, ⁇ when the liquid pool is generated but disappears within 1 second, and the liquid pool is generated within 1 second. The case where it did not disappear is indicated by x.
  • the liquid pool is generated, spraying of the chemical liquid is inhibited by the liquid pool. Therefore, it is preferable that the liquid pool does not occur.
  • the particle size distribution width indicates the width of the particle size distribution from D 10 to D 90.
  • Show. [About ultrasonic atomizer] Test conditions common / specific to Comparative Example 1, Comparative Example 2 and the present example are as follows.
  • Comparative example 2 (dome-shaped diaphragm)
  • a ⁇ 4.5 mm liquid-absorbing core suitable for a dome-shaped diaphragm was used. This liquid absorbent core has a porosity of 70%.
  • Example (conical frustum type diaphragm) In this embodiment, a ⁇ 3.5 mm liquid-absorbing core suitable for a frustum-shaped diaphragm is used.
  • This liquid absorbent core has a porosity of 50%, and an absorbent body in which two non-woven fabrics (Asahi Kasei Co., Ltd., Bencott) are stacked is integrated with the liquid absorbent core.
  • Spray amount (mg / spray) According to the test result of the spray amount, the spray amount of Comparative Example 1 (flat plate type) is markedly lower than that of Comparative Example 2 (dome type) and this example (conical frustum type) in the tested viscosity range.
  • the frustum-type diaphragm has a larger amount of chemical spray than the plate-type and dome-type diaphragms. It was shown that the amount of the active ingredient that sufficiently satisfies the effect can be immediately sprayed into the space, and the effects such as sterilization and insecticide when the apparatus is operated under the same conditions are most expected. Moreover, since the spray amount of the chemical solution is large, the active ingredient content in the chemical solution can be minimized, and it has been shown that the cost reduction and the safety due to contact with the chemical solution can be extremely enhanced.
  • FIG. 8 is a diagram showing the relationship between the viscosity and the spray amount when a flat plate type, dome type or frustum type diaphragm is used.
  • the horizontal axis indicates the viscosity (mPa ⁇ s (20 ° C.)), and the vertical axis indicates the spray amount (mg / spray).
  • the spray amount is larger in the order of the truncated cone type, the dome type, and the flat plate type. Comparing the truncated cone type and the dome type, a difference of about 2.9 times the maximum at a viscosity of 5 mPa ⁇ s (20 ° C) and about 1.5 times the minimum at a viscosity of 1.70 mPa ⁇ s (20 ° C) is recognized. It was.
  • the frustoconical type has a larger spray amount than the flat plate type and the dome type, particularly at a viscosity of 1.70 to 5.00 mPa ⁇ s (20 ° C.).
  • Spray stability (%) According to the spray stability test results, this example (conical frustum type) has lower numerical values than Comparative Example 1 (flat plate type) and Comparative Example 2 (dome type) in all the viscosity ranges tested. It was shown that the spray stability was excellent. In particular, a large difference in spray stability is observed in the viscosity range of 1.70 to 5.00 mPa ⁇ s (20 ° C.).
  • the frustum-type diaphragm is superior in spraying stability and has higher stability of the effect obtained by spraying than the flat plate and dome type diaphragms.
  • the spray stability increases to 16.4%. It was.
  • the frustum-shaped diaphragm has higher spray stability than the flat plate-type and dome-shaped diaphragms, and thus the spray stability is low.
  • the frustum-shaped diaphragm can solve the problem that the spraying number of the chemical solution bottle cannot be satisfied when the spraying operation with a very large spray amount occurs due to the low spray stability. Indicated.
  • Spray height (cm) According to the spray height test results, the spray height is higher in this example (conical frustum type) than in comparative example 1 (flat plate type) and comparative example 2 (dome type) in all viscosity ranges tested. And the diffusibility of the chemical solution was confirmed to be excellent. In particular, the frustum type has a significantly higher spray height than the flat type. In addition, in the viscosity range of 4.00 to 5.00 mPa ⁇ s (20 ° C.), a sharp drop was observed in the spray height of the dome shape, but such numerical change was not recognized in the truncated cone shape. .
  • Comparative Example 1 flat plate type
  • Comparative Example 2 dome type
  • a tendency for liquid pool to be easily generated is recognized as the viscosity increases.
  • palm oil having a viscosity of 2.9 mPa ⁇ s (20 ° C.)
  • 2-methyl-1-propanol having a viscosity of 4.00 mPa ⁇ s (20 ° C.).
  • the frustum-shaped diaphragm was excellent in spray stability from the viewpoint of liquid pool.
  • the dome type In the dome type, a fine hole is formed on the entire surface of the dome part, and there is no flat part like the upper base of the truncated cone type. Therefore, in the dome type, liquid leakage is likely to occur in the fine holes on the side surface of the dome portion where the chemical liquid is not sprayed. Further, the dome type is liable to affect the stability of the spray if the liquid absorbent core is not in contact with the entire surface of the dome portion. On the other hand, in the truncated cone type, since there is less possibility of liquid pooling in the fine holes other than the top bottom, the truncated cone type also has a structure in which liquid pooling is less likely to occur than in the dome type. It can be said that it has excellent spray stability.
  • Particle size distribution width ( ⁇ m) According to the test results of the particle size distribution width, this example (conical frustum type) is a comparative example in methanol having a viscosity of 0.59 mPa ⁇ s (20 ° C.) and ethanol having a viscosity of 1.17 mPa ⁇ s (20 ° C.). The particle size distribution width was wider than 1 (flat plate type) and Comparative Example 2 (dome type).
  • the dome-shaped particle size distribution width is the largest, while the truncated cone-shaped particle size distribution width is narrow.
  • the particle size distribution width of the truncated cone did not change greatly from a viscosity of 1.70 mPa ⁇ s (20 ° C.) to a viscosity of 5.00 mPa ⁇ s (20 ° C.).
  • the flat plate type had a viscosity of 4.00 or more
  • the dome type had a viscosity of 4.40 or more, making it difficult to confirm the particle size distribution width. From this, it was found that the plate type and the dome type tend to become unstable in particle size as the viscosity increases.
  • the frustum-shaped diaphragm has a spray amount, a spray stability, a spray height, a liquid pool on the top surface of the diaphragm, and a spray compared to the flat plate and dome diaphragms. The superiority was recognized in all the measurement items such as the particle size distribution width of the chemical solution.
  • the diaphragm is a cone type, and particularly when a chemical solution having a viscosity of 1.7 mPa ⁇ s (20 ° C.) to 5.0 mPa ⁇ s (20 ° C.) is used, a low viscosity chemical solution is used.
  • a conical diaphragm The problem that may occur in the case of being concealed can be supplemented by a conical diaphragm.
  • medical solution can also be implement
  • a low-viscosity chemical solution generally increases the spray amount of the chemical solution, but may impair spray stability. Therefore, in this embodiment, the spray is stabilized by using a frustoconical diaphragm that is unlikely to cause liquid accumulation, and the problem of spray instability that may occur when using a low-viscosity chemical solution is overcome. Yes.
  • the spray amount and the spray height can be further increased to improve the diffusibility of the chemical solution, and the insecticidal effect of the chemical solution can be improved.
  • a chemical solution having a low viscosity of 1.7 mPa ⁇ s (20 ° C.) to 5.0 mPa ⁇ s (20 ° C.) and a frustoconical diaphragm is used, there is little change in the particle size distribution width. Spray stability is maintained, and stable effects (insecticidal and bactericidal effects, etc.) can be obtained.
  • effect confirmation test 1 various conditions such as the diameter of the micropores in the effect confirmation test 1 do not limit the specifications of the ultrasonic atomizer 1.
  • a conical diaphragm is used, but even a truncated pyramid diaphragm can be expected to have the same effect as a truncated cone diaphragm because of its structure.
  • the diaphragms 32 and 40 have a micropore diameter of 6.0 ⁇ m, and the dimensions of the diaphragms 32 and 40 are a convex portion upper bottom diameter of 2.5 mm, a convex portion lower bottom diameter of 5.0 mm, and a convex shape.
  • the one with a part height of 0.2 mm was used.
  • medical solution used for this test is ethanol (viscosity 1.17 mPa * s (20 degreeC)). The same applies to the following comparative examples.
  • dome-shaped diaphragm A and diaphragm B made of nickel were used.
  • the dome shape means a shape in which the convex portion bulges in an R shape in the spray direction of the chemical solution.
  • the diaphragm A has fine holes formed only on the surface forming the dome.
  • the diaphragm B has fine holes formed in the entire diaphragm B.
  • Diaphragms A and B are those having a fine hole diameter of 6 ⁇ m, and the dimensions of diaphragms A and B are those having a diameter of 3 mm at the base end of the convex part and a height of the convex part of 0.2 mm. did.
  • the chemical solution was sprayed in the examples and comparative examples, and the height from the spray port to the highest point of mist that could be observed was measured visually.
  • the highest point of mist in (Example) was 41.3 cm for diaphragm 32 and 33.1 cm for diaphragm 40.
  • the highest point of mist in (Comparative Example) was 24.3 cm for diaphragm A and 23.8 cm for diaphragm B.
  • the highest point of the mist was shown to be higher in the truncated cone type diaphragm 32 and the diaphragm 40 according to the example than the dome-shaped diaphragm A and the diaphragm B in the comparative example.
  • the diaphragm 32 can achieve a chemical spray height approximately 1.7 times that of the diaphragm A and the diaphragm B, and the diaphragm 40 can approximately 1.4 times as high as the diaphragm A and the diaphragm B. It was done.
  • the deterioration of the diaphragm means a case where the spray amount is reduced by 50% or more before and after the test.
  • the diaphragm 32 was 0 that deteriorated in nine experiments. That is, the deterioration rate was 0%.
  • both of the diaphragm A and the diaphragm B were 3 which deteriorated in five experiments. That is, the deterioration rate was 60% in all cases.
  • the deterioration rate of the diaphragm is lower in the truncated cone-shaped diaphragm according to the present embodiment than the dome-shaped diaphragm according to the comparative example.
  • the vibration plate 32 in which the fine holes 36 are formed only on the upper bottom has a deterioration rate of 0%, whereas the deterioration rate in the comparative example is 60%.
  • the height stands out.
  • the frustoconical convex portion 37 of the vibration plate 32 and the dome portion of the vibration plate A (B) are both formed by pressing a flat plate-shaped vibration plate in which fine holes are formed.
  • a large processing strain is generated at the time of pressing on the entire dome, particularly on the top of the dome.
  • the truncated cone-shaped convex portion 37 of the diaphragm 32 (40) almost no processing distortion occurs during pressing at the upper bottom, so that the upper bottom of the truncated cone-shaped convex portion 37 is lower.
  • the top of the dome is likely to crack due to vibration during driving, and the deterioration rate of the diaphragm is considered to be high.
  • the power is turned on without the user having noticed that the chemical container is not installed, and that the chemical liquid is exhausted when the apparatus is used (the chemical container is empty). If the deterioration of the diaphragm can be suppressed, the life of the device can be extended. In other words, by increasing the durability of the device, it is possible to reduce the user burden in terms of cost.
  • the frustum-type diaphragm has a spray amount, spray stability, spray height, liquid pool on the top surface of the diaphragm, and the particle size of the sprayed chemical solution, compared to flat plate and dome type diaphragms. Excellent in all measurement items such as distribution width.
  • the diffusibility of the chemical solution is enhanced, and the effects of the chemical solution (humidification effect, aroma effect, insecticidal effect, etc.) are spread over a wide range, and high immediate effect is expected. be able to.
  • the frustum type diaphragm can significantly reduce the deterioration rate of the diaphragm as compared with the conventional diaphragm.
  • the life of the apparatus can be extended by using a frustum-shaped diaphragm, the frequency of replacement of the apparatus is reduced, and the burden on the user in terms of cost is reduced. be able to.
  • the chemical solution may further have a viscosity of 1.7 mPa ⁇ s (20 ° C.) to 4.0 mPa ⁇ s (20 ° C.).
  • the spray amount of the chemical solution is further increased, and the spray stability can be kept good.
  • the diaphragm may have a configuration in which the fine holes are formed only on the upper bottom of the convex portion.
  • the ultrasonic atomizer according to the present invention can further increase the spray height of the liquid and increase the durability of the diaphragm.
  • the diaphragm may have a configuration in which the fine holes are formed in the entire diaphragm.
  • the ultrasonic atomizer according to the present invention can increase the durability of the diaphragm as compared with the conventional ultrasonic atomizer using a dome-shaped diaphragm.
  • the convex portion of the diaphragm may be a truncated cone.
  • the convex portion of the diaphragm may have a truncated pyramid shape.
  • the convex portion of the diaphragm may have a truncated cone shape or a truncated pyramid shape.
  • the shape of the convex part of the diaphragm can be changed to a truncated cone shape or a truncated pyramid shape so as to suit the layout of the device and the shape of the liquid absorption core for each device, and the device design can be flexibly changed. can do.
  • the chemical liquid storage container is detachably accommodated in the ultrasonic atomizing device, and the chemical liquid absorbed by the liquid absorption core is supplied to the diaphragm.
  • the absorbent body may be configured to be attached to and detached from the ultrasonic atomizer together with the chemical liquid storage container when the chemical liquid storage container is attached to and detached from the ultrasonic atomizer.
  • the absorber when the chemical liquid storage container is taken out from the ultrasonic atomizer, the absorber is taken out of the apparatus together with the chemical liquid storage container, and therefore does not remain on the ultrasonic atomizer side. For this reason, when there is no chemical in the chemical storage container and the absorber is dried, the entire absorbent is replaced when the chemical storage container is replaced. It can suppress that the fine hole of a diaphragm is obstruct
  • the ultrasonic atomization apparatus reduces the amount of spraying the chemical liquid unstable due to the above-mentioned blockage, and also forcing the user to replace the vibration plate requiring high cost. be able to.
  • the ultrasonic atomization device can improve the spray stability of the ultrasonic atomization device by suppressing the clogging of the micropores of the diaphragm, and further reduce the cost.
  • the user burden can be reduced.
  • the ultrasonic atomizer according to the present invention may have a configuration in which the rising portion of the convex portion is provided in the vicinity of the inner peripheral surface of the piezoelectric vibrator.
  • the present invention is suitably applied to an ultrasonic atomizer used for humidification, aroma, and sterilization in a difference.

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  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Insects & Arthropods (AREA)
  • Wood Science & Technology (AREA)
  • Toxicology (AREA)
  • Environmental Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Catching Or Destruction (AREA)
  • Special Spraying Apparatus (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Air Humidification (AREA)
PCT/JP2013/062346 2012-04-27 2013-04-26 超音波霧化装置 Ceased WO2013161986A1 (ja)

Priority Applications (4)

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US14/396,445 US20150129681A1 (en) 2012-04-27 2013-04-26 Ultrasonic atomization device
CN201380022041.4A CN104271256A (zh) 2012-04-27 2013-04-26 超声波雾化装置
ES13781836T ES2759200T3 (es) 2012-04-27 2013-04-26 Dispositivo de atomización ultrasónica
EP13781836.5A EP2842641B1 (en) 2012-04-27 2013-04-26 Ultrasonic atomization device

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CN108271757A (zh) * 2018-02-09 2018-07-13 四川农业大学 一种牵引式静电喷雾机
CN110332625B (zh) * 2019-05-14 2020-11-03 深圳丽之健电子科技有限公司 一种空气净化装置
US11407000B2 (en) * 2019-09-23 2022-08-09 S. C. Johnson & Son, Inc. Volatile material dispenser
CN113262923B (zh) * 2020-02-14 2023-11-28 深圳麦克韦尔科技有限公司 微孔雾化片及雾化装置
CN111632175A (zh) * 2020-06-02 2020-09-08 英诺激光科技股份有限公司 雾化消毒方法
AT523636B1 (de) * 2020-08-17 2021-10-15 Ess Holding Gmbh Zerstäubungsvorrichtung für ein Beschichtungsmittel
CN217446711U (zh) * 2021-12-17 2022-09-20 深圳麦克韦尔科技有限公司 雾化件及电子雾化装置
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JP6014359B2 (ja) 2016-10-25
JP2013230430A (ja) 2013-11-14
EP2842641A1 (en) 2015-03-04
US20150129681A1 (en) 2015-05-14
CN104271256A (zh) 2015-01-07
ES2759200T3 (es) 2020-05-07
EP2842641A4 (en) 2015-12-30

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