EP0689879B1 - Ultraschallzerstäuber - Google Patents

Ultraschallzerstäuber Download PDF

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Publication number
EP0689879B1
EP0689879B1 EP95110003A EP95110003A EP0689879B1 EP 0689879 B1 EP0689879 B1 EP 0689879B1 EP 95110003 A EP95110003 A EP 95110003A EP 95110003 A EP95110003 A EP 95110003A EP 0689879 B1 EP0689879 B1 EP 0689879B1
Authority
EP
European Patent Office
Prior art keywords
hat
raised portion
shaped raised
coupling body
piezoceramic
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.)
Expired - Lifetime
Application number
EP95110003A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0689879A1 (de
Inventor
Olaf Dipl.-Phys. Haack
Randolf Dr. Mock
Klaus Dipl.-Ing. Van Der Linden
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0689879A1 publication Critical patent/EP0689879A1/de
Application granted granted Critical
Publication of EP0689879B1 publication Critical patent/EP0689879B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to an ultrasonic atomizer for liquid atomization.
  • a large number of technical applications require to produce aerosols from liquids.
  • a drug such as B. a bronchospasmolytic to atomize a respiratory aerosol.
  • EP 0 246 515 A1 describes an ultrasound MHz oscillator, in particular for liquid atomization, in which an amplitude transformer attached to a piezoceramic disc is, with the amplitude transformer - starting from the piezoceramic disc - tapers first and then ends in a widening atomizing plate.
  • This atomizer plate has a concave surface ("Concave mirror") for receiving the liquid to be atomized on.
  • An ultrasonic atomizer is in the form of US 4,085,893 known as a "dumbbell vibrator".
  • This "dumbbell vibrator” has a cylindrical component and a also essentially cylindrical vibration element on. The diameter of the vibration element is smaller than the diameter of the cylindrical member.
  • the Vibration element has a rounded cap. The The length of the component is greater than its diameter.
  • JP 3 137 957 shows an ultrasonic atomizer according to the preamble of claim 1, which has a coupling body in the form of a horn.
  • the Coupling body is coupled to an ultrasound generator.
  • a construction part is a disk-shaped component intended to the Attach the coupling body and the ultrasound generator.
  • GB 2 073 616 A shows an ultrasonic atomizer, which a coupling body with a hat, mushroom or umbrella-shaped elevation.
  • the survey is included formed as a hollow body.
  • the liquid to be atomized is shaped on the outer surface of the hat, mushroom or umbrella Elevation directed, which is only in the center of its inner surface is held by a stem.
  • the invention has for its object an ultrasonic atomizer specify at which those mentioned above Energy losses due to the reflection of the ultrasonic waves the liquid / air boundary layer can be kept relatively small and the relatively small volume of liquid, e.g. B. about 50 ⁇ l, atomized so that a high proportion of respirable Droplets with a diameter of less than 10 ⁇ m are formed.
  • an ultrasonic atomizer which is an electrically excitable piezoceramic and one that is operatively connected to the piezoceramic
  • Has coupling body which with the to be atomized Liquid contacting surface of the coupling body is formed as a hat-shaped elevation, the hat-shaped Elevation and the coupling body from a metallic Solid material exist, the coupling body at the base the hat-shaped elevation as going beyond the edge of the elevation Disc is formed, the entire room between the surface of the hat-shaped elevation and the Base is filled with the metallic solid material, and the height of the hat-shaped elevation being smaller than that Diameter at their base.
  • a hat-shaped survey is a survey in general with an essentially convex surface.
  • Essentially convex should also be understood to mean that the top of the elevation be flattened to a plateau can.
  • the survey does not necessarily have to be rotationally symmetrical be designed.
  • the disk protruding over the edge of the elevation represents is an acoustic bottleneck for the excitation energy is the energy loss during the transition of ultrasound negligible in a surrounding housing, and on the other hand, this makes the excitation energy special large portion coupled into the hat-shaped elevation and thus used for liquid atomization.
  • a particularly advantageous embodiment of the invention provides before that the disc on the side facing away from the survey Side has a ring for receiving the piezoceramic.
  • the piezoceramic which is usually called Washer is designed to be fixed in a simple manner.
  • the coupling body is advantageous Manner of metal, preferably of titanium or a titanium alloy, consists.
  • the hat-shaped Elevation is essentially rotationally symmetrical.
  • she can preferably be parabolic or elliptical in section, but also be designed exponentially.
  • An embodiment of the invention is based on a figure explained in more detail. This figure shows in a schematic Representation of a longitudinal section through an ultrasonic atomizer.
  • the ultrasonic atomizer 2 comprises a piezoceramic disk 4, a coupling body 6 and a membrane body 8.
  • the piezoceramic disk 4 is no further in the exemplary embodiment electrodes shown, the one to no further shown, the piezo-ceramic stimulating electrical Resonant circuit are connected.
  • the piezoceramic disc 4 is operated in the exemplary embodiment in thickness resonance, d. H. the sound waves are essentially parallel to Radiation symmetry axis 10 emitted.
  • the coupling body 6 consists of a single metallic Piece and is made of titanium or a titanium alloy.
  • the coupling body 6 has three different sections on:
  • the first section is a hat-shaped, here rotationally symmetrical parabolic elevation 12, which in the embodiment a height of about 4 mm and a diameter of about 10 mm.
  • the second section begins at the base 14 of the parabolic Elevation 12 and stretches significantly as disk 16 out the edge of the survey 12.
  • the third section represents a ring 18 on the Arranged from the elevation 12 side of the disc 16 is.
  • a membrane body 8 and Piezoceramic disk 4 glued in place.
  • the membrane body 8 is made preferably made of plastic. Different from the figure can also the use of the membrane body can be dispensed with.
  • the Ultrasonic atomizers then do not require an additional one Active ingredient, which may affect its function can improve.
  • the coupling body 6 is preferably made of titanium or one Titanium alloy, the coupling body 6 and the Liquid to be atomized f only a small difference in sound resistance on what's beneficial to the reflection factor of the sound pressure affects.
  • the survey 12 can also be flattened at the highest point without a "concave mirror" exists, which serves as a collecting basin for the atomizing liquid acts.

Landscapes

  • Special Spraying Apparatus (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP95110003A 1994-06-29 1995-06-27 Ultraschallzerstäuber Expired - Lifetime EP0689879B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4422822 1994-06-29
DE4422822 1994-06-29

Publications (2)

Publication Number Publication Date
EP0689879A1 EP0689879A1 (de) 1996-01-03
EP0689879B1 true EP0689879B1 (de) 2000-09-20

Family

ID=6521846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110003A Expired - Lifetime EP0689879B1 (de) 1994-06-29 1995-06-27 Ultraschallzerstäuber

Country Status (7)

Country Link
US (1) US5716002A (es)
EP (1) EP0689879B1 (es)
JP (1) JPH0824739A (es)
AT (1) ATE196436T1 (es)
CA (1) CA2152747A1 (es)
DE (1) DE59508726D1 (es)
ES (1) ES2151009T3 (es)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996028206A1 (en) * 1995-03-14 1996-09-19 Siemens Aktiengesellschaft Ultrasonic atomizer device with removable precision dosating unit
NZ304285A (en) * 1995-03-14 1998-12-23 Siemens Ag Ultrasonic atomizer device with a removable precision dosing unit
US6050575A (en) * 1997-01-22 2000-04-18 Vitec Group, Plc Relating to Camera pedestals
CN1153630C (zh) 1999-03-05 2004-06-16 约翰逊父子公司 振动液体雾化器及其操作方法
US6293474B1 (en) * 1999-03-08 2001-09-25 S. C. Johnson & Son, Inc. Delivery system for dispensing volatiles
US6539937B1 (en) * 2000-04-12 2003-04-01 Instrumentarium Corp. Method of maximizing the mechanical displacement of a piezoelectric nebulizer apparatus
EP1214986A1 (de) 2000-12-13 2002-06-19 Siemens Aktiengesellschaft Ultraschallzerstäuber
US20050260138A1 (en) * 2004-05-21 2005-11-24 Virgil Flanigan Producton and use of a gaseous vapor disinfectant
US20090321534A1 (en) * 2005-12-02 2009-12-31 Nfd, Llc Aerosol or gaseous decontaminant generator and application thereof
US8348177B2 (en) 2008-06-17 2013-01-08 Davicon Corporation Liquid dispensing apparatus using a passive liquid metering method
US20110232312A1 (en) * 2010-03-24 2011-09-29 Whirlpool Corporation Flexible wick as water delivery system
GB201013463D0 (en) * 2010-08-11 2010-09-22 The Technology Partnership Plc Electronic spray drive improvements
AU2013201383B2 (en) * 2013-03-01 2015-07-02 Royal Melbourne Institute Of Technology Atomisation apparatus using surface acoustic wave generaton
CN112023198A (zh) * 2020-08-21 2020-12-04 泸州市中医医院(泸州市中西医结合医院、泸州市江阳区中医医院) 雾化器及通气系统

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214101A (en) * 1964-03-31 1965-10-26 Little Inc A Apparatus for atomizing a liquid
US3325858A (en) * 1964-10-02 1967-06-20 Gen Dynamics Corp Sonic apparatus
US3561444A (en) * 1968-05-22 1971-02-09 Bio Logics Inc Ultrasonic drug nebulizer
US4085893A (en) * 1974-03-20 1978-04-25 Durley Iii Benton A Ultrasonic humidifiers, atomizers and the like
NL189237C (nl) * 1980-04-12 1993-02-16 Battelle Institut E V Inrichting voor het verstuiven van vloeistoffen.
DE3112339A1 (de) * 1980-04-12 1982-02-25 Battelle-Institut E.V., 6000 Frankfurt "vorrichtung zur zerstaeubung von fluessigkeiten"
US4474326A (en) * 1981-11-24 1984-10-02 Tdk Electronics Co., Ltd. Ultrasonic atomizing device
EP0174033B1 (en) * 1984-09-07 1991-03-27 OMRON Corporation Oscillating construction for an ultrasonic atomizing inhaler
DE3616713A1 (de) 1986-05-20 1987-11-26 Siemens Ag Ultraschall-mhz-schwinger, insbesondere zur fluessigkeitszerstaeubung
DE3724629A1 (de) * 1987-07-22 1989-02-02 Siemens Ag Piezoelektrisch anregbares resonanzsystem
JPH03109960A (ja) * 1989-06-30 1991-05-09 Tonen Corp 超音波霧化装置
JPH03137957A (ja) * 1989-07-31 1991-06-12 Tonen Corp 超音波霧化装置

Also Published As

Publication number Publication date
JPH0824739A (ja) 1996-01-30
US5716002A (en) 1998-02-10
DE59508726D1 (de) 2000-10-26
ATE196436T1 (de) 2000-10-15
CA2152747A1 (en) 1995-12-30
ES2151009T3 (es) 2000-12-16
EP0689879A1 (de) 1996-01-03

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