EP0438599B1 - Nozzle for jetting a self-vibratory fluid stream - Google Patents
Nozzle for jetting a self-vibratory fluid stream Download PDFInfo
- 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
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Images
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 ; Fluidic oscillators
-
- 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)
Abstract
Description
- 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 (including a jetting nozzle), 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. Moreover, 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.
- Of these conventional water spraying devices, 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. In addition, 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. Further, 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 - It is the object of the invention to provide a jetting nozzle which can stably produce a high-frequency self-vibration by a jet stream from a main nozzle, and in which flowing loss is small and variation in characteristics resulting from wear is small.
- This object is solved according to the invention by the subject matter of
claim 1 orclaim 2. - Preferred embodiments of the invention are subject matter of the subclaims.
- Thus, 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.
- Alternatively, 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. Furthermore, 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.
- In order to describe the present invention in more detail, the embodiments will be described hereunder with reference to the accompanying drawings.
- 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 amain nozzle 2 for forming a jet stream connected to thefeeding port 1, an air chamber defined by right andleft walls 3, 3' and connected with themain nozzle 2, anoutput port 5 provided with right and left claw-like portions 4, 4' rounded on a radius R and leading to thewalls 3, 3'; and a plate A withair ports 6, 6'. - In addition, 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 straightlinear parts 7, 7' respectively lead to the claw-like portions 4, 4', and end parts leading to the straightlinear 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 thefeeding port 1 becomes a jet stream through themain nozzle 2 and an eddy is generated between the jet stream and thewall 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. In this case, 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. In addition, when the claw-like portions are acute, 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, and Fig. 5(b) is a sectional view taken along line b-b in Fig. 5(a). In this alternative, the cross-sections of the portions from the claw-
like portions 4, 4' to the straightlinear parts 7, 7' at the outside thereof in theoutput 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. - Moreover, the 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.
- Next, the results of an experiment comparing the conventional self-vibratory fluid stream jetting nozzle disclosed in JP-A-49-1916 etc. and the self-vibratory fluid stream jetting nozzle of the present invention are shown.
Table I Results of experiment L L L ma C R ma R R I 0.35 0.62 0.62 0.66 0.39 0.39 0.66 0.64 0.68 0.45 II 0.43 0.77 0.79 0.82 0.46 0.44 0.83 0.92 0.84 0.48 III 0.60 0.66 0.76 0.76 0.65 0.60 0.71 0.82 0.78 0.67 Notes
1. the units in the table is 10 N/cm²
2. the supply pressure is 20 N/cm²
3. the figures give the averages of the upper 5 ranks - As described previously, 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.
- (1) Flowing efficiency is raised with flowing loss reduced.
- (2) Variations in characteristics of the spray angle, the distribution of the water spraying and the characteristics of flowing or the like resulting from wear are prevented.
- (3) When the claw-like portions are rounded and the cross-section of the output port is curved inwardly, the effects are even more pronounced.
- Consequently, when these self-vibratory fluid stream jetting nozzles are applied to a water spraying device and a jetting cleaning machine, the washing ability or the like is even more increased.
Claims (4)
- A nozzle for jetting a self-vibratory fluid stream, comprising spaces defined at the right and the left of a main jet stream from a main nozzle (2) and of an output port (5) wider than the spreading width of the jet stream, so as to cause self-vibration without the provision of an inertance loop by means of alternately generated eddies in the right or left space and pressure difference caused by the absorptive effect arising from the wake,
characterized in that
the right and left walls (3,3) of the output port consist of an outwardly diverging rounded portion rounded on a radius and continuously leading to the walls (3,3') confining the right and left space so as to reduce flowing loss in the jet stream to raise flowing efficiency and to prevent variation in characteristics resulting from wear. - A nozzle for jetting a self-vibratory fluid stream, comprising spaces defined at the right and the left of a main jet stream from a main nozzle, and an output port wider than a spreading width of the jet stream, so as to cause self-vibration without the provision of an inertance loop by means of alternately generated eddies in the right or left space and pressure difference caused by the absorptive effect arising from the wake,
characterized in that
the right and left walls (4,4') of the output port viewed in cross-section to the jet stream are curved inwardly so as to reduce flowing loss in the jet stream to raise flowing efficiency and to prevent variation in characteristics resulting from wear. - A nozzle for jetting self-vibratory fluid stream according to claim 1, characterized in that the right and left walls (4,4') of the output port (5) viewed in cross-section to the jet stream are curved inwardly, so as to reduce flowing loss in the jet stream to raise flowing efficiency and to prevent variation in characteristics resulting from wear.
- A nozzle for jetting self-vibratory fluid stream according to at least one of claims 1-3, characterized in that said main nozzle (2) is formed in a plate (B), which is assembled with a plate (A) having air ports (6,6') and a plate (C), having a feeding port (1).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP209615/89 | 1989-08-15 | ||
JP1209615A JPH0661486B2 (en) | 1989-08-15 | 1989-08-15 | Self-oscillating injection nozzle |
PCT/JP1990/000994 WO1991002594A1 (en) | 1989-08-15 | 1990-08-03 | Nozzle for jetting self-vibratory fluid stream exhibiting high cleaning efficiency by varying the shape of output port |
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 (en) |
JP (1) | JPH0661486B2 (en) |
DE (1) | DE69017645T2 (en) |
DK (1) | DK0438599T3 (en) |
WO (1) | WO1991002594A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4920233B2 (en) * | 2005-10-12 | 2012-04-18 | シヤチハタ株式会社 | Stamping device |
JP4952143B2 (en) * | 2006-08-24 | 2012-06-13 | パナソニック株式会社 | Hand dryer |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5621471Y2 (en) * | 1976-06-01 | 1981-05-21 | ||
US4210283A (en) * | 1978-09-11 | 1980-07-01 | Bowles Fluidics Corp | Dual pattern windshield washer nozzle |
JPS6135866A (en) * | 1984-07-27 | 1986-02-20 | Nippon Soken Inc | Self-oscillation type fluid scattering element |
US4644854A (en) * | 1985-03-27 | 1987-02-24 | Bowles Fluidics Corporation | Air sweep defroster |
JPH0810003B2 (en) * | 1987-01-07 | 1996-01-31 | 松下電器産業株式会社 | Fluid oscillation element |
-
1989
- 1989-08-15 JP JP1209615A patent/JPH0661486B2/en not_active Expired - Lifetime
-
1990
- 1990-08-03 DK DK90911712T patent/DK0438599T3/en active
- 1990-08-03 WO PCT/JP1990/000994 patent/WO1991002594A1/en active IP Right Grant
- 1990-08-03 DE DE69017645T patent/DE69017645T2/en not_active Expired - Fee Related
- 1990-08-03 EP EP90911712A patent/EP0438599B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0377660A (en) | 1991-04-03 |
DE69017645T2 (en) | 1995-07-06 |
EP0438599A4 (en) | 1992-04-08 |
DE69017645D1 (en) | 1995-04-13 |
EP0438599A1 (en) | 1991-07-31 |
JPH0661486B2 (en) | 1994-08-17 |
DK0438599T3 (en) | 1995-07-24 |
WO1991002594A1 (en) | 1991-03-07 |
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