EP0438599B1 - Nozzle for jetting a self-vibratory fluid stream - Google Patents

Nozzle for jetting a self-vibratory fluid stream Download PDF

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Publication number
EP0438599B1
EP0438599B1 EP90911712A EP90911712A EP0438599B1 EP 0438599 B1 EP0438599 B1 EP 0438599B1 EP 90911712 A EP90911712 A EP 90911712A EP 90911712 A EP90911712 A EP 90911712A EP 0438599 B1 EP0438599 B1 EP 0438599B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
jet stream
self
stream
jetting
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
EP90911712A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0438599A4 (en
EP0438599A1 (en
Inventor
Yasuki Nakayama
Masakane Ohkubo
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.)
CREO-UNI Co Ltd
Original Assignee
CREO-UNI 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 CREO-UNI Co Ltd filed Critical CREO-UNI Co Ltd
Publication of EP0438599A1 publication Critical patent/EP0438599A1/en
Publication of EP0438599A4 publication Critical patent/EP0438599A4/en
Application granted granted Critical
Publication of EP0438599B1 publication Critical patent/EP0438599B1/en
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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/08—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/22—Oscillators

Definitions

  • This invention relates to a nozzle for jetting a self-vibratory fluid stream, and more particularly to a nozzle for jetting without moving parts a self-vibratory fluid stream, provided with a rounded portion or a straight linear part rounded at an output port or provided with a output port with an inwardly curved cross-section so that flowing efficiency is raised.
  • Conventional water spraying devices include a device such as a watering can with a system for directly jetting water through a plurality of pores and a device such as a sprinkler or the like for spraying water with a system mechanically moving a jetting nozzle.
  • a water spraying device disclosed in JP-A-49-1916 and JP-A-50-6644 etc. has a system comprising a main nozzle for forming a jet stream in a jetting nozzle, side walls for producing eddies on the right and left sides of the jet stream, and claw-like portions contiguous to the side walls for dividing and dispersing the jet stream, so as to induce the jet stream to curve to create self-vibration by means of the difference in the right and left eddies generated between the side walls and the jet stream, and to disperse the jet stream with the claw-like portions for spraying the fluid over a wide range.
  • the device such as a watering can with the system for directly jetting water through a plurality of pores,exhibits the disadvantage that the pores are inclined to become plugged with dust and the trajectory of the jet stream is short because of a large flowing resistance or the like.
  • the device such as a sprinkler with the system mechanically moving a jetting nozzle, shows the disadvantage that mechanically moving parts are damaged and production costs are high because of the complicated structure or the like.
  • the water spraying device with a self-vibration system disclosed in JP-A-49-1916 and JP-A-50-6644 exhibits the disadvantage that an energy loss is largely produced by the impingement of the jet stream against the claw-like portions of the output port and the characteristics of the claw-like portion is changed by wear or the like.
  • a nozzle for jetting a self-vibratory fluid stream according to the preamble of claims 1 and 2 is known from EP-A-0 197 346.
  • This known fluidic oscillator is preferably used for issuing a defrosting jet of air upon a windshield of a vehicle.
  • the nozzle has a pair of control ports adjacent to the downstream side of a nozzle and a continuous inertance loop interconnecting the control ports said continuous inertance loop being of a length and cross-section such as to maintain the frequency of oscillation in a preferred range.
  • the self-vibratory stream jetting nozzle is an output port provided with a rounded claw-like portion so that exfoliation and contraction are restrained, flowing loss is reduced and adhesive action is increased to increase the angle of water spraying, as compared with the output port of the conventional self-vibratory stream jetting nozzle having an acute claw-like portion and a straight linear part contiguous thereto. Moreover, a stable vibration can continue over a long period because variations resulting from wear are prevented.
  • the self-vibratory stream jetting nozzle is provided with an output port having a portion extending from a claw-like portion to a straight linear part curved inwardly in the cross-section thereof so that the flowing loss can also be similarly reduced to increase the volume of flow.
  • the two systems above can be combined to provide an output port with rounded claw-like portions curved inwardly in cross-section so that the above effects are intensified.
  • Fig. 1 is an exploded perspective view of an embodiment of the first alternative according to a self-vibratory fluid stream jetting nozzle of the present invention
  • Fig. 2 is a front view of the assembled nozzle
  • Fig. 3 is an exploded perspective view of another embodiment of the first alternative
  • Fig. 4 is a front view of the assembled nozzle
  • Fig. 5 (a), (b) are an assembled view and a sectional view taken along the line b-b' of the second alternative.
  • Fig. 1 is an exploded perspective view of an embodiment of the first alternative
  • Fig. 2 is a front view of the assembled self-vibratory fluid stream jetting nozzle.
  • the device comprises, in combination: a plate C having a feeding port 1; a plate B comprising a main nozzle 2 for forming a jet stream connected to the feeding port 1, an air chamber defined by right and left walls 3, 3' and connected with the main nozzle 2, an output port 5 provided with right and left claw-like portions 4, 4' rounded on a radius R and leading to the walls 3, 3'; and a plate A with air ports 6, 6'.
  • Fig. 3 is an exploded perspective view of another embodiment of the first alternative
  • Fig. 4 is a front view of the assembled nozzle, wherein right and left claw-like portions 4, 4' are rounded on a radius R and straight linear parts 7, 7' respectively lead to the claw-like portions 4, 4', and end parts leading to the straight linear parts 7, 7' are respectively rounded on a radius R.
  • the self-vibratory action of these self-vibratory fluid stream jetting nozzles is similar to that of the devices disclosed in JP-A-49-1916 and the output port 5 is a little wider than the spreading width of the jet stream and fluid provided from the feeding port 1 becomes a jet stream through the main nozzle 2 and an eddy is generated between the jet stream and the wall 3 or 3' contacting the jet stream. Air between the jet stream and the wall on the opposite side is removed by the jet stream to produce a pressure difference between the right and left sides of the jet stream so that the jet stream is resultingly bent to the right or left. By repeating this action, a stable self-vibration is continued.
  • the claw-like portions 4, 4' are not acute, but rounded on a radius R so that flowing efficiency is raised with flowing loss reduced.
  • the characteristics as the spray angle, the distribution of the water spraying and the flowing characteristics or the like are largely changed resulting from wear, but when the claw-like portions are initially rounded, the claw-like portions do not appreciably change from wear, therefore these characteristics are not significantly changed.
  • Fig. 5(a) is an assembled view of an embodiment of the second alternative
  • Fig. 5(b) is a sectional view taken along line b-b in Fig. 5(a).
  • the cross-sections of the portions from the claw-like portions 4, 4' to the straight linear parts 7, 7' at the outside thereof in the output port 5 are curved inwardly. In this case, the flowing efficiency is raised with flowing loss reduced and the characteristics are not changed from wear.
  • first alternative and the second alternative may be combined to provide claw-like portions rounded and curved inwardly in cross-section so that the effects are even more outstanding.
  • the self-vibratory fluid stream jetting nozzle of the present invention achieves the following effects by providing the output port of the self-vibratory fluid stream jetting nozzle with the rounded claw-like portions and the output port curved inwardly in cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Cleaning In General (AREA)
  • Special Spraying Apparatus (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP90911712A 1989-08-15 1990-08-03 Nozzle for jetting a self-vibratory fluid stream Expired - Lifetime EP0438599B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1209615A JPH0661486B2 (ja) 1989-08-15 1989-08-15 自己発振型噴射ノズル
JP209615/89 1989-08-15
PCT/JP1990/000994 WO1991002594A1 (fr) 1989-08-15 1990-08-03 Buse de projection de jets de fluide autovibrants se caracterisant par une efficacite de nettoyage elevee grace a la variation de la forme de l'orifice de sortie du jet

Publications (3)

Publication Number Publication Date
EP0438599A1 EP0438599A1 (en) 1991-07-31
EP0438599A4 EP0438599A4 (en) 1992-04-08
EP0438599B1 true EP0438599B1 (en) 1995-03-08

Family

ID=16575732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911712A Expired - Lifetime EP0438599B1 (en) 1989-08-15 1990-08-03 Nozzle for jetting a self-vibratory fluid stream

Country Status (5)

Country Link
EP (1) EP0438599B1 (da)
JP (1) JPH0661486B2 (da)
DE (1) DE69017645T2 (da)
DK (1) DK0438599T3 (da)
WO (1) WO1991002594A1 (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4920233B2 (ja) * 2005-10-12 2012-04-18 シヤチハタ株式会社 押印装置
JP4952143B2 (ja) * 2006-08-24 2012-06-13 パナソニック株式会社 手乾燥装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621471Y2 (da) * 1976-06-01 1981-05-21
US4210283A (en) * 1978-09-11 1980-07-01 Bowles Fluidics Corp Dual pattern windshield washer nozzle
JPS6135866A (ja) * 1984-07-27 1986-02-20 Nippon Soken Inc 自己発振型流体散布素子
US4644854A (en) * 1985-03-27 1987-02-24 Bowles Fluidics Corporation Air sweep defroster
JPH0810003B2 (ja) * 1987-01-07 1996-01-31 松下電器産業株式会社 流体発振素子

Also Published As

Publication number Publication date
EP0438599A4 (en) 1992-04-08
DK0438599T3 (da) 1995-07-24
WO1991002594A1 (fr) 1991-03-07
DE69017645T2 (de) 1995-07-06
EP0438599A1 (en) 1991-07-31
JPH0661486B2 (ja) 1994-08-17
JPH0377660A (ja) 1991-04-03
DE69017645D1 (de) 1995-04-13

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