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
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/0318—Processes
  • Y10T137/0396—Involving pressure control
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/2087—Means to cause rotational flow of fluid [e.g., vortex generator]
  • Y10T137/2093—Plural vortex generators
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/2087—Means to cause rotational flow of fluid [e.g., vortex generator]
  • Y10T137/2098—Vortex generator as control for system
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/2087—Means to cause rotational flow of fluid [e.g., vortex generator]
  • Y10T137/2104—Vortex generator in interaction chamber of device
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/2087—Means to cause rotational flow of fluid [e.g., vortex generator]
  • Y10T137/2109—By tangential input to axial output [e.g., vortex amplifier]
  • Y10T137/2115—With means to vary input or output of device
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/218—Means to regulate or vary operation of device
  • Y10T137/2185—To vary frequency of pulses or oscillations
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/2224—Structure of body of device
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
  • Y10T137/2229—Device including passages having V over T configuration
  • Y10T137/2234—And feedback passage[s] or path[s]

Definitions

• Fluidic oscillators are well known in the art, some using feedback passages with wall attachment effect and without wall attachment effect (see Bray U.S. Patent No. 4,463,904 for fluidic oscillators which utilize wall attachment and see Stouffer U.S. Patent No. 4,508,267 for fluidic oscillators which do not depend on or use wall attachment).
• There are fluidic oscillators which issue an oscillating spray to ambient which do not utilize or incorporate feedback passages (see, for example, Stouffer U.S. Patent No. 4,151,955 which utilizes an island to generate an oscillating output and Bauer U.S. Patent No. 4,184,636 which is a reversing chamber type oscillator).
• the present invention is a fluidic oscillator of the type that is free of feedback or control passages and provides a shaped oscillation chamber having at least one outlet and at least a pair of power nozzles adapted to form a pair of liquid jets which are oriented at angles in the chamber to each other such that they interact and generate a plurality of vortices in the chamber.
• the plurality of vortices cause the pair of liquid jets to cyclically change their directions and combine to produce a sweeping jet of liquid at the outlet.
• the oscillating chamber has a dome- or mushroom-shaped surface, a manifold feeding the power nozzles and an outlet to ambient is in a wall opposite the dome- or mushroom-shaped surface.
• the device is based on the internal instability of two jets of liquid in a cavity.
• the two jets are properly sized and oriented in an interaction chamber such that the resulting flow pattern give a system of vortices which are inherently unstable and cause the two jets to cyclically change their directions.
• This provides a sweeping jet at the exit of the chamber.
• the exit outlet or aperture can be designed to produce either an oscillating sheet for area coverage or a fan type, planar spray.
• the power nozzles need not be symmetrically oriented relative to the central axis of the oscillation chamber.
• the outlet and outlet throat can be adapted to issue a yawed sweeping jet.
• the object of the invention is to provide an improved fluidic oscillator and more particularly to provide a fluidic oscillator which issues a sweeping jet of fluid or liquid to ambient.
• FIG. 1 illustrates a basic configuration of the invention
• Figures 2A, 2B and 2C illustrate a sweeping jet at the exit of the fluidic oscillator shown in Figure 1;
• Figure 3 is a further embodiment of the invention in which the corners of the oscillation chamber are straightened;
• Figure 4 is a further embodiment of the invention wherein the oscillation chamber is modified to be in an oval shape
• Figures 5A, 5B (which is an isometric perspective view of Figure 5A) and 6 disclose embodiments wherein a single feed configuration is used in the internal geometry divides the flow into two jets
• Figure 7 illustrates the location of the jets angled and oriented in the direction of the dome-shaped wall and the addition of deflectors to direct the flow towards the exit at the conditions required to produce the oscillatory flow
• Figure 8 is a modification of the embodiment shown in
• Figure 9 illustrates a multiple power nozzle oscillator incorporating the invention and having multiple outlets ;
• Figures 10A illustrates a further embodiment of the invention,
• Figure 10B illustrates a multiple power nozzle oscillator incorporating the invention with one of the power nozzles being wider than the other power nozzle to adjust the yaw angle of the spray output to ambient,
• Figure IOC illustrates a similar silhouette wherein the axes of the respective power nozzles intersect the central axis at different points;
• Figure 10D is a similar silhouette wherein the outlet throat is offset (to the right in the embodiment), and
• Figure 10E is a similar silhouette showing the throat offset along the longitudinal central axis of the oscillator;
• Figure 11A illustrates a manifold for multiple power nozzles with a power nozzle feed,
• Figure 11B is an isometric perspective view of Figure 11A;
• Figure 12 illustrates a typical assembly process of a molded fluidic circuit or silhouette chip and a housing and fluid source.
• the fluidic oscillator of the present invention is based on the internal instability of two jets of liquid or fluid in a cavity.
• the two liquid jets or streams are properly sized and oriented in an interaction region (also called the oscillation chamber) such that the resulting flow pattern is a system of vortices that is inherently unstable and causes the two jets to cyclically change their direction.
• the exit or outlet EX geometry is designed to produce either an oscillating sheet for area coverage or a fan-type, planar spray.
• FIG. 1 The basic configuration is illustrated in Figure 1 and comprises an interaction chamber IC having multiple power nozzles PN1 and PN2.
• the flow in the chamber creates a four-vortex system (see Figure 2) that is inherently unstable. This results in a sweeping jet SJ at the exit or outlet aperture as shown in Figure 2.
• Figure 3 the corners of the interaction chamber
• IC have been straightened as indicated, and in Figure 4 the chamber IC" is modified to be in an oval shape.
• a single-feed manifold SF is used with the internal passages (i.e. the internal geometry divides the flow into two jets).
• the two power nozzles 7PN1, 7PN2 issue jets Jl and J2 , respectively, which are located and oriented or angled towards the dome-shape of the chamber and deflectors Dl, D2 have been added to direct the flow toward the exit EX7 at the conditions required to produce the oscillatory flow.
• Figure 8 is a modification of the embodiment shown in Figure 7 with a single feed manifold SFM used with internal passages .
• the embodiment shown in Figures 7 and 8 has a significantly lower oscillating frequency than the multiple power nozzle fluidic oscillators shown in Figures 1 - 6 and 10A - 10E. Consequently, the wavelength of the oscillations is significantly longer, being about five times longer than comparable oscillators with multiple power nozzles.
• the multiple input power nozzles PN1 ' ' and PN2 ' ' are reversed in direction so as to generally head away from the outlet EX7 while still colliding in the oscillation chamber to produce oscillations in the output jet.
• the exit shape for all configurations can be modified to obtain either a full or area coverage or a fan spray.
• the oscillator embodiment shown in Figure 9 has multiple power nozzles 9PN1, 9PN2 fed from a common supply 9CS.
• the mushroom-shaped oscillation chamber 90C has a plurality of outlet ports 90P1, 90P2.
• This device will produce pulsatile flow in each of the outlet ports 90P1, 90P-2, out of phase with each other.
• the circuits can be of various lengths and widths. In some cases the power nozzle length can be very small compared to the remainder of the fluidic circuit. The maximum width of the circuit is measured in terms of the power nozzle widths such as about 15W where is the width of a selected power nozzle.
• the shape of the power nozzle manifold forms one of the walls of the interaction or oscillation chamber.
• the length can be matched to fit existing housings.
• the circuit has what can be called a "feed inlet nozzle" 11F1 leading to the power nozzle manifold.
• the power nozzle widths can be of different widths and shapes ( Figure 10B) .
• the power nozzles can have offsets (Figure IOC) which produce yaw angles in a fan angle to the left or right depending on the direction desired.
• the exit throat is off axis (off the central axis of the symmetry) ( Figure 10D) by a small fraction to the left or right to move the leftward or rightward yaw angles in the spray.
• the throat is offset along the longitudinal axis ( Figure 10E) by a small amount to produce a yaw angle of predetermined degree to the left or right depending on what is desired.
• the fluidic circuit or silhouette will be an injection molded plastic chip which is pressed into a molded housing having a fluid input barb in the manner disclosed in Merke et al Patent No. 5,845,845 or Bauer Patent No. 4,185,777.
• Figure 12 shows a fluidic circuit chip FCC, having a face 12F in which one of the silhouettes or circuits shown herein has been molded, being inserted into a housing FCCH having an input barb FCCB for receiving a hose or other connection to a source of fluid under pressure.
• Various filters and check valves, etc. may be included.
• Typical uses for the device include spraying and disbursing of fluent materials, liquids and gases.
• One particularly advantageous use is spray of washer liquids on glass surfaces, such as windshields, rear vehicle windows and headlamps for vehicles .

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)
• Special Spraying Apparatus (AREA)
• Diaphragms For Electromechanical Transducers (AREA)
• Jet Pumps And Other Pumps (AREA)
• Apparatuses For Generation Of Mechanical Vibrations (AREA)

Priority Applications (8)

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Publications (1)

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• 1999
  • 1999-10-14 US US09/417,899 patent/US6253782B1/en not_active Expired - Lifetime
  • 1999-10-15 KR KR1020017004798A patent/KR20010080195A/ko not_active Withdrawn
  • 1999-10-15 EP EP99954624A patent/EP1121201B1/en not_active Expired - Lifetime
  • 1999-10-15 JP JP2000576965A patent/JP3881518B2/ja not_active Expired - Lifetime
  • 1999-10-15 AU AU10930/00A patent/AU1093000A/en not_active Abandoned
  • 1999-10-15 AT AT99954624T patent/ATE268646T1/de not_active IP Right Cessation
  • 1999-10-15 CA CA 2344570 patent/CA2344570A1/en not_active Abandoned
  • 1999-10-15 WO PCT/US1999/021463 patent/WO2000023197A1/en not_active Ceased
  • 1999-10-15 DE DE1999617918 patent/DE69917918T2/de not_active Expired - Lifetime
  • 1999-10-15 BR BR9914598A patent/BR9914598A/pt not_active Application Discontinuation

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