EP0282616B1 - Pulvérisateur de liquide à ultrasons - Google Patents

Pulvérisateur de liquide à ultrasons Download PDF

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Publication number
EP0282616B1
EP0282616B1 EP87103907A EP87103907A EP0282616B1 EP 0282616 B1 EP0282616 B1 EP 0282616B1 EP 87103907 A EP87103907 A EP 87103907A EP 87103907 A EP87103907 A EP 87103907A EP 0282616 B1 EP0282616 B1 EP 0282616B1
Authority
EP
European Patent Office
Prior art keywords
cap
housing
cap part
diaphragm
ultrasonic liquid
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
Application number
EP87103907A
Other languages
German (de)
English (en)
Other versions
EP0282616A1 (fr
Inventor
Lothar Bendig
Frieder Hofmann
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.)
Lechler GmbH and Co KG
Original Assignee
Lechler GmbH and Co KG
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 Lechler GmbH and Co KG filed Critical Lechler GmbH and Co KG
Priority to DE8787103907T priority Critical patent/DE3760650D1/de
Priority to AT87103907T priority patent/ATE46836T1/de
Priority to EP87103907A priority patent/EP0282616B1/fr
Priority to JP63009751A priority patent/JPS63252569A/ja
Priority to BR8800272A priority patent/BR8800272A/pt
Priority to US07/167,136 priority patent/US4796807A/en
Publication of EP0282616A1 publication Critical patent/EP0282616A1/fr
Application granted granted Critical
Publication of EP0282616B1 publication Critical patent/EP0282616B1/fr
Expired 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
    • B05B17/0623—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 coupled with a vibrating horn
    • B05B17/063—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 coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
    • 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
    • B05B17/0623—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 coupled with a vibrating horn

Definitions

  • the invention relates to an ultrasonic liquid atomizer according to the preamble of claim I.
  • An ultrasonic liquid atomizer which has a part of the aforementioned features, has become known from DE-PS 32 33 901.
  • BE-A 902.301 shows a partial further development of this known ultrasonic liquid atomizer. It consists of a sieve-like membrane resting on the atomizing plate, which causes the droplets atomized from the atomizing plate to be guided in a targeted jet over a certain distance.
  • the jet-shaped misting means a decisive advantage in the endeavor to bring the droplets as far as possible to those places on the object to be sprayed where they are desired to hit.
  • the known device according to BE-A 902.301 consists of a fixed attachment piece which carries the sieve-shaped membrane and which is fastened to the housing of the ultrasound liquid atomizer via a rigid connection. Due to the inevitable tolerances of all components, this does not guarantee that the membrane always rests on the atomizing plate with a defined pre-tension. Any pre-tensioning force that is too strong has the disadvantageous effect that the atomizing plate is braked and therefore can no longer oscillate. A too low pre-tension or even an air gap between the membrane and the atomizer plate would mean the disadvantage that the desired effect of the membrane, namely to distribute the liquid film evenly on the atomizer plate, no longer comes into play and the drops atomized by the atomizer plate would rather be in the membrane get stuck.
  • FIG. 1 An exemplary embodiment shown in the drawing, which is described below, serves to illustrate the invention.
  • the drawing shows in detail - partly in side view, partly in vertical longitudinal section - an embodiment of an ultrasonic liquid atomizer.
  • the piezoelectric transducer part 10 consists of two ceramic disks II, 12. Between the two ceramic disks 11, 12 of the piezoelectric transducer part 10 is an electrode designated 13, which contains an electrical connection (not shown in the drawing) to the outside.
  • the piezoelectric disks II, 12 sit concentrically on a pin part 14, which has a thread 15. To the other side (on the right in the drawing), the pin part 14 widens like a shoulder to a transducer element 16, which serves as a right-sided axial stop for the three piezoelectric disks II, 12, 13. On the left side, the piezoelectric disks II, 12, 13 are axially fixed by a nut 17, which is screwed onto the thread 15.
  • the transducer element 16 has a lateral connection bore 18 into which a line 19 serving for the supply of liquid opens.
  • the liquid supplied through the line 19 enters an axial bore (not shown) which extends within an amplitude transformer 20.
  • the amplitude transformer 20 is integrally connected to the parts 16 and 14. At its end, it also merges into an atomizing plate 21.
  • the parts 20, 21 are axially penetrated centrally by the aforementioned bore.
  • the liquid to be atomized is conveyed onto the surface of the atomizing plate 21, where fine atomization of the liquid takes place due to the high-frequency vibrations of the atomizing plate 21.
  • the drawing also makes it clear that the parts 16, 20 and 21 are concentrically surrounded by an approximately cylindrical housing, which is numbered 22 in total.
  • the housing 22 is placed on a flange 23 formed between the amplitude transformer 20 and the transducer element 16.
  • Two annular seals 24, 25 are arranged on both sides of the flange 23, which ensure a seal between the high-voltage-carrying piezoelectric transducer part 10 and the amplitude transformer 20 in contact with liquid.
  • the necessary fastening of housing 22 and seals 24, 25 to flange 23 is provided by a thrust washer 26 and a circlip 27 acting thereon, which is fixed in a groove 28 of housing 22.
  • the housing 22 has a radial bore 29 which is penetrated by the liquid line 19.
  • the front part of the amplitude transformer 20, including the atomizing plate 21, is surrounded within the housing 22 by an attachment, generally designated 30, which carries a sieve-shaped membrane 31 on its front side.
  • the attachment 30 is - as explained in detail below - held on the housing 22 such that the membrane rests on the atomizing plate 21 under resilient prestress.
  • the attachment 30 consists of two parts arranged concentrically to one another, an inner first attachment part 32 carrying the membrane 31 and an outer second attachment part 33 serving for fastening the entire attachment 30 to the housing 22.
  • the first attachment part 32 has a radially outwardly directed collar 34
  • the second attachment part 33 has a radially inwardly directed paragraph 35.
  • a helical compression spring 36 is arranged in such a way that the sieve-shaped membrane 31 is resiliently held in contact with the atomizing plate 21 and the reaction force of the helical compression spring 36 is introduced into the second attachment part 33 fixed to the housing.
  • the helical compression spring 36 is supported on the one hand on the collar 34 and on the other hand on the shoulder 35.
  • annular gap 37 which serves to receive the helical compression spring 36 due to the design features described above.
  • the second attachment part 33 is designed as a union nut and screwed onto a corresponding external thread 38 of the housing 22.
  • the union nut 33 can be fastened to the housing 22 by means of a bayonet or snap connection.
  • the helical compression spring 36 is permanently attached at 40 by a press fit in the second attachment part 33.
  • the membrane 31 is attached to the front end of the first attachment part 32.
  • the first attachment part 32 accordingly extends - starting from the atomizing plate 21 - backwards.
  • the first attachment part 32 consists of two concentric sleeves 41, 42, the outer sleeve 41 having a collar 43 which overlaps the inner sleeve 42 at the front end.
  • the membrane 31 is glued between the front end face of the inner sleeve 42 and the collar 43.
  • the first attachment part 32 can also be formed in one piece as a plastic injection-molded part and the membrane 31 can be encapsulated by the material of the first attachment part 32 at its edge.

Landscapes

  • Special Spraying Apparatus (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Catching Or Destruction (AREA)
  • Cosmetics (AREA)

Claims (12)

1. Pulvérisateur de liquide fonctionnant par ultrasons, avec un élément de transducteur piézoélectri- que qui est accouplé mécaniquement à un transformateur d'amplitude (désigné aussi par les termes de "cornet" ou de "trompe"), avec un plateau de pulvérisation disposé à l'extrémité libre du transformateur d'amplitude, avec encore une enveloppe entourant au moins le transformateur d'amplitude et avec une garniture portant une membrane en forme de tamis, fixée à l'enveloppe, de telle sorte que la membrane s'applique sur le plateau de pulvérisation, caractérisé en ce que la garniture (30) consiste en deux parties disposées concentriquement l'une par rapport à l'autre, où une première partie de garniture (32) se trouvant à l'intérieur porte la membrane (31) et où une seconde partie de garniture (33) se trouvant à l'extérieur sert à la fixation de toute la garniture (30) à l'enveloppe (22), et en ce que, entre les deux parties de garniture (32, 33) et sollicitant ces dernières en directions axiales opposées, sont disposés des moyens à ressort (36), de telle sorte que la membrane (31) en forme de tamis est maintenue en application élastique avec le plateau de pulvérisation (21) et que la force de réaction des moyens à ressort (36) est dirigée alors dans la seconde partie de garniture (35) solidaire de l'enveloppe.
2. Pulvérisateur de liquide fonctionnant par ultrasons suivant la revendication 1, caractérisé en ce que la première partie de garniture (32) présente un collet (34) dirigé radialement vers l'extérieur, et en ce que la seconde partie de garniture (33) présente une partie décalée, dirigée radialement vers l'intérieur, et en ce que les moyens à ressort (36) s'appliquent d'une part au collet (34) et d'autre part à la partie décalée (35).
3. Pulvérisateur de liquide fonctionnant par ultrasons, suivant la revendication 1 ou 2, caractérisé en ce que, entre la paroi extérieure de la première partie de garniture cylindrique (32) et la paroi intérieure de l'enveloppe (22), est formé un intervalle annulaire (37) qui sert à recevoir les moyens à ressort (36).
4. Pulvérisateur de liquide fonctionnant par ultrasons, suivant les revendications 2 et 3, caractérisé en ce que l'intervalle annulaire (37) est limité axialement, à son extrémité avant, du coté du plateau de pulvérisation, par la partie décalée (55) de la seconde partie de garniture (33) et, à son extrémité arrière, par le collet (34) de la première partie de garniture (32), et en ce que, dans l'intervalle annulaire (37) est disposé un ressort hélicoïdal de compression (36).
5. Pulvérisateur de liquide fonctionnant par ultrasons, suivant la revendication 2, 3 ou 4, caractérise en ce que les moyens à ressort (36) sont fixés de manière inamovible, par un ajustement pressé, dans la seconde partie de garniture (33).
6. Pulvérisateur de liquide fonctionnant par ultrasons, suivant une ou plusieurs des revendications précédentes, caractérisé en ce que la membrane (31) est fixée à l'extrémité avant de la première partie de garniture (32) et en ce que la première partie de garniture (32) s'étend vers l'arrière à partir du plateau de pulvérisation (21).
7. Pulvérisateur de liquide fonctionnant par ultrasons, suivant la revendication 6, caractérisé en ce que la première partie de garniture (32) se compose de deux douilles concentriques (41, 42), où la douille extérieure (41) présente un collet (43) surplombant la douille inférieure (42) à son extrémité avant, et en ce que la membrane (31) est collée entre la face frontal avant de la douille inférieure (42) et le collet (43).
8. Pulvérisateur de liquide fonctionnant par ultrasons, suivant une ou plusieurs des revendications 1 à 6, caractérisé en ce que la première partie de garniture (32) est formée en une pièce par une partie de matière synthétique coulée par injection, et en ce que la membrane (31) est recouverte par injection, à son bord, par la matière de la première partie de garniture (32).
9. Pulvérisateur de liquide fonctionnant par ultrasons, suivant une ou plusieurs des revendications précédentes, caractérisé en ce que la seconde partie de garniture (33) est réalisée par un écrou-chapeau et est vissée sur un filet extérieur correspondant (38) de l'enveloppe (22).
10. Pulvérisateur de liquide fonctionnant par ultrasons, suivant une ou plusieurs des revendications 1 à 8, caractérisé en ce que la seconde partie de garniture ( 3) réalisée comme écrou-chapeau présente un assemblage à baïonnette avec l'enveloppe (22).
11. Pulvérisateur de liquide fonctionnant par ultrasons, suivant une ou plusieurs des revendications 1 à 8, caractérisé en ce que la seconde partie de garniture (33) réalisée comme écrou-chapeau présente un assemblage à déclic avec l'enveloppe (22).
12. Pulvérisateur de liquide fonctionnant par ultrasons, suivant une ou plusieurs des revendications précédentes, caractérisé en ce que l'enveloppe (22) est montée sur une bride (23) formée entre l'élément de transducteur (16) et le transformateur d'amplitude (20), est rendue étanche par rapport à l'élément de transducteur (16) au moyen de bagues d'étanchéité (24, 25) disposées des deux côtés de la bride (23), et est fixée à la bride (23) par un disque de pression (26) avec une bague de sécurité (27).
EP87103907A 1987-03-17 1987-03-17 Pulvérisateur de liquide à ultrasons Expired EP0282616B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE8787103907T DE3760650D1 (en) 1987-03-17 1987-03-17 Ultrasonic liquid sprayer
AT87103907T ATE46836T1 (de) 1987-03-17 1987-03-17 Ultraschall-fluessigkeitszerstaeuber.
EP87103907A EP0282616B1 (fr) 1987-03-17 1987-03-17 Pulvérisateur de liquide à ultrasons
JP63009751A JPS63252569A (ja) 1987-03-17 1988-01-21 超音波液体噴霧器
BR8800272A BR8800272A (pt) 1987-03-17 1988-01-25 Atomizador de liquido a ultra-som
US07/167,136 US4796807A (en) 1987-03-17 1988-03-11 Ultrasonic atomizer for liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87103907A EP0282616B1 (fr) 1987-03-17 1987-03-17 Pulvérisateur de liquide à ultrasons

Publications (2)

Publication Number Publication Date
EP0282616A1 EP0282616A1 (fr) 1988-09-21
EP0282616B1 true EP0282616B1 (fr) 1989-10-04

Family

ID=8196844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103907A Expired EP0282616B1 (fr) 1987-03-17 1987-03-17 Pulvérisateur de liquide à ultrasons

Country Status (6)

Country Link
US (1) US4796807A (fr)
EP (1) EP0282616B1 (fr)
JP (1) JPS63252569A (fr)
AT (1) ATE46836T1 (fr)
BR (1) BR8800272A (fr)
DE (1) DE3760650D1 (fr)

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Also Published As

Publication number Publication date
US4796807A (en) 1989-01-10
JPS63252569A (ja) 1988-10-19
ATE46836T1 (de) 1989-10-15
BR8800272A (pt) 1988-09-27
DE3760650D1 (en) 1989-11-09
EP0282616A1 (fr) 1988-09-21

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