WO2023133602A1 - Buse de mélange servant à mélanger un liquide avec de l'air - Google Patents

Buse de mélange servant à mélanger un liquide avec de l'air Download PDF

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Publication number
WO2023133602A1
WO2023133602A1 PCT/AT2022/060408 AT2022060408W WO2023133602A1 WO 2023133602 A1 WO2023133602 A1 WO 2023133602A1 AT 2022060408 W AT2022060408 W AT 2022060408W WO 2023133602 A1 WO2023133602 A1 WO 2023133602A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
flow channel
nozzle
mixing nozzle
outer part
Prior art date
Application number
PCT/AT2022/060408
Other languages
German (de)
English (en)
Inventor
Niklas AL-DEEK
Original Assignee
Liontech Gmbh
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 Liontech Gmbh filed Critical Liontech Gmbh
Publication of WO2023133602A1 publication Critical patent/WO2023133602A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/08—Jet regulators or jet guides, e.g. anti-splash devices
    • E03C1/084—Jet regulators with aerating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/2319—Methods of introducing gases into liquid media
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0425—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid without any source of compressed gas, e.g. the air being sucked by the pressurised liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/48—Mixing water in water-taps with other ingredients, e.g. air, detergents or disinfectants

Definitions

  • the invention relates to a mixing nozzle for mixing a liquid, in particular hot water from a shower system, with air.
  • an aeration device is known from DE 100 08 438 A1, in which case air is added to the inflowing shower water. The water is accelerated through a funnel and decelerated again in a subsequent diffuser area.
  • WO 2005/054591 A1 proposes a flow limiter with a mixing chamber in the shape of a truncated cone.
  • the geometry of the air intake tract can also have a disadvantage in known mixing nozzles, since pressure waves can oscillate in the moving compressible air in the intake tract, which further lead to a pulsating flow of the air/water mixture when showering.
  • the object of the invention is therefore to solve these and other problems and to create a mixing nozzle in which the flow pressure loss through the mixing nozzle is as low as possible, but a large volume of air can be sucked in and the risk of back pressure in the air openings is minimized.
  • a mixing nozzle is designed for mixing a liquid flowing in a flow direction with air and comprises an essentially cylindrical outer part with a central first flow channel running in the flow direction.
  • the first flow channel has a first area that tapers in the direction of flow and has an adjoining second area that widens in the direction of flow, so that a constriction is formed in the first flow channel.
  • a mixing nozzle comprises an essentially cylindrical inner part with a central second flow channel running in the direction of flow.
  • the inner part is arranged or can be arranged concentrically in the outer part, so that the flow channels run coaxially and merge into one another.
  • On the outer circumference of the inner part there is a circumferential groove and a collar that connects to it and projects radially outwards, with the collar having at least one opening for introducing air into the liquid flow.
  • the outer part has at least one radial opening leading to the outside, the radial opening opening into the peripheral groove of the inner part.
  • the inner part is arranged in the outer part in such a way that the second flow channel ends in the flow direction in front of the constriction of the first flow channel.
  • the nozzle opening of the second flow channel is thus arranged upstream of the smallest flow cross section of the first flow channel, so that the liquid jet after the nozzle opening of the second flow channel is further accelerated by the tapered shape of the first area of the first flow channel, the sucked air up to the constriction of the first flow channel .
  • the constriction of the first flow channel there is essentially a laminar and rotationally symmetrical flow, with the air flow enclosing the liquid jet concentrically and in the form of a circular ring.
  • the mixing nozzle according to the invention can be regarded as a two-phase pressure reducer, with the exiting air/water mixture being formed by a water flow entering the tube and an air flow entering the shell.
  • the water inlet on the pipe side is subjected to a pressure of about 2.5 to 6 bar, which is usual in the sanitary area, so that a flow, driven by the water pressure and possibly stationary, occurs in the mixing nozzle.
  • the distance between the constriction of the first flow channel and the end of the second flow channel, i.e. in particular from the nozzle opening of the inner part, can be less than 5 mm, preferably less than 3 mm, particularly preferably about 2 mm, in order to achieve particularly good enveloping of the liquid jet with air.
  • the inner part can be removed from the outer part.
  • the inner part is formed in one piece with the outer part.
  • the collar of the inner part is in contact with the inner surface of the first flow channel of the outer part.
  • a direct flow transition can be formed between the openings in the collar and the first flow channel.
  • this ensures that the air sucked in from the outside only flows through the opening of the collar into the first flow channel.
  • Provision can preferably be made for the first flow channel to run continuously and be continuously curved at the transition from the first area to the second area. As a result, oscillating flows can be dampened, since such a transition has a flow-stabilizing effect.
  • the second flow channel is nozzle-shaped and the inner part has a nozzle extension extending in the direction of flow with a nozzle opening, the nozzle opening being arranged in the direction of flow in front of the constriction of the first flow channel.
  • the flow channels can preferably merge into one another and the transitional volume of the two flow channels can be designed in such a way that the flow in this area is as laminar as possible.
  • the second flow channel can have an upstream inlet funnel which narrows in the flow direction and is rounded on the inside, in particular in the shape of a circular arc.
  • the collar has two to ten, preferably four to eight, particularly preferably six openings arranged uniformly along the circumference of the collar.
  • the outer part has two to six, preferably two to four, particularly preferably three radial openings arranged uniformly along the circumference of the outer part.
  • an oscillating flow can also occur, with the air mass flow being sucked in at a speed that oscillates around an average speed.
  • a flow can be prevented with a special design of the air intake tract, in particular an adapted geometry of the openings in the flange of the inner part, so that a stationary flow is achieved if necessary.
  • the geometry of the air intake tract means the cavity of the mixing nozzle in which unmixed air can flow during operation of the mixing nozzle - i.e. the radial openings, the circumferential groove of the inner part, the openings of the inner part, and the first flow channel, in particular the first area of the first flow channel.
  • the total area of all openings in the collar is essentially the same size as the total area of all radial openings in the outer part.
  • the openings of the collar border on the outer surface of the nozzle extension.
  • the air flow can be brought as close as possible to the water jet or to the area of the strongest local suction effect, so that the air volume flow can be increased.
  • the openings of the collar are adjacent to the inner surface of the first flow channel. In this way, the air flow can be guided into the outer part in the most streamlined manner possible, without flow breaks being formed at an additional edge and thus lower pressure losses occurring as a result of flow deflections.
  • the inner part and the outer part are connected by a press connection according to DIN 8593. Provision can be made for the outer part to have an external thread and an opposite internal thread, which are preferably designed as Whitworth pipe threads in accordance with ISO 228-1.
  • a non-return valve is arranged in the opening in the collar of the inner part, which prevents liquid from flowing counter to the direction of flow through the opening and exiting through the radial opening in the outer part. This can occur if, after the mixing nozzle, a component is provided which generates a back pressure, for example an economy shower head.
  • the opening can be designed as a funnel which widens in the direction of flow and into which a stainless steel ball is movably fitted. If the liquid flows against the direction of flow due to counter-pressure, the stainless steel ball is pressed against the constriction of the funnel and closes it. If, on the other hand, air flows in the specified flow direction, the stainless steel ball releases the constriction of the funnel.
  • the collar rests against an inner edge of the outer part with the widened side of the funnel. In order to ensure that air can flow through, the collar can have a lateral recess on its inside.
  • the mixing nozzle is set up for mounting on a shower hose and/or for mounting on a sanitary fitting.
  • the peripheral groove is formed up to the outer diameter of the nozzle extension.
  • the air can be distributed evenly in the circumferential groove and identical volume flows can be achieved through the openings in the collar.
  • the inner part and the outer part comprise brass, or that the outer part and/or the inner part is electrolytically chrome-plated. If necessary, it can be provided that the inner part has six evenly arranged openings in the collar and the outer part has three evenly arranged radial openings. As a result, a mixing nozzle can be realized which is improved both with regard to the production outlay in terms of manufacturing technology and with regard to the aerodynamic requirements.
  • the openings in the collar of the inner part can each have a diameter of 0.8 mm to 2.0 mm, preferably 1.0 mm to 1.4 mm, particularly preferably 1.2 mm.
  • the radial openings of the outer part can each have a diameter of 0.8 mm to
  • 2.5 mm preferably 1.0 mm to 2.0 mm, particularly preferably 1.7 mm.
  • the diameter of the outer part can be in the range of 10 mm to 40 mm, preferably 20 mm to 30 mm, particularly preferably about 25 mm.
  • the length of the outer part can be in the range of 30 mm to 45 mm, preferably about 36 mm, with the length of the first flow channel preferably being about 20 mm.
  • the diameter of the inner part can be in the range of 5 mm to 20 mm, preferably 8 mm to 15 mm, particularly preferably about 11 mm.
  • the length of the inner part can be in the range of 7 mm to 12 mm, preferably about 9 mm, with the second flow channel extending over the entire length of the inner part.
  • the diameter of the first and / or second flow channel can be in the range of
  • the peripheral groove can have a depth in the range from 1.5 mm to 4 mm, preferably 2 mm to 3 mm, particularly preferably about 2.5 mm.
  • the length of the circumferential groove in the flow direction can be about 1.0 mm to 3 mm, preferably 1.2 mm to 2 mm, particularly preferably about 1.5 mm.
  • FIG. 1 shows the cross section through a first embodiment of an outer part of a mixing nozzle according to the invention
  • Fig. 2 shows the section A-A of the embodiment of Fig. 1;
  • FIG. 3 shows a side view of a first embodiment of an inner part of a mixing nozzle according to the invention
  • Fig. 4 shows the section B-B of the embodiment of Fig. 3;
  • FIG. 5 shows the cross section of a first embodiment of a mixing nozzle according to the invention
  • FIG. 6 shows a three-dimensional oblique view of a first embodiment of a mixing nozzle according to the invention
  • figs 7a-7c show a further embodiment of a mixing nozzle according to the invention in different views.
  • FIG. 1 shows the cross section through a first embodiment of an outer part 2 of a mixing nozzle 1 according to the invention.
  • the sectioned solid of the outer part 2 is shown hatched, with the outer part 2 having an internal thread and an external thread in this embodiment, which are only symbolically represented by lines.
  • the two threads are in the form of Whitworth pipe threads in accordance with ISO 228-1.
  • the horizontal dashed line represents the essentially rotationally symmetrical axis of the outer part 2 and the vertical dashed line A-A represents the progression of the sectional plane of FIG.
  • the outer part 2 is of essentially cylindrical design and has a circular recess which is arranged concentrically to the outer diameter of the outer part 2 and in which an inner part 3 can be arranged concentrically.
  • the recess is provided with a flat chamfer at the edge, so that an inner part 3 can be inserted into the outer part 2 without problems and without tilting.
  • the outer part 2 has three radial openings 9 in the recess, which are offset from one another by 120°, and one of the three radial openings 9 is shown in section in the lower region of FIG. In the area of the recess, the lower opening of a further circular radial opening 9 is shown as an ellipse due to the view projection.
  • the total area of all three radial openings 9 corresponds to three times the cross-sectional area normal to the axis of such a radial opening 9.
  • the outer part 2 forms a central first flow channel 12 which has a first area 10 which tapers in the direction of flow and an adjoining second area 11 which widens in the direction of flow.
  • the specified flow direction is from left to right.
  • the first flow channel 12 extends in the flow direction from the edge of the recess to the opposite edge of the outer part 2 and is divided in this embodiment into a first area 10, a second area 11 and an area with a constant diameter.
  • no third area with a constant diameter can be provided.
  • the transition from the first area 10 to the second area 11 is marked as a vertical dashed line and thus also clearly shows the constriction in the first flow channel 12.
  • Fig. 2 shows the section A-A through the outer part 2 of the embodiment of Fig. 1, wherein the plane of the radial openings 9 is cut and four concentric circles are shown.
  • the innermost circle shows the constriction in the first flow channel 12.
  • the second smallest circle shows the inner diameter of the outer part 2, which essentially encloses the nozzle extension 7 when the inner part 3 is inserted, and on which the openings 6 adjoin tangentially on the outside.
  • the second largest circle shows a diameter that corresponds to the outside diameter of the inner part 3 .
  • the inner part 3 shows a side view of a first embodiment of an inner part 3 of a mixing nozzle 1 according to the invention.
  • the inner part 3 is of essentially cylindrical construction and has a central second flow channel 12'.
  • the inner part 3 has a circumferential groove 4 and a collar 5 delimiting the groove.
  • the radial openings 9 of the outer part 2 open into the circumferential groove 4 of the inner part 3.
  • the inner part has an inlet funnel 13 on the front side and a nozzle extension downstream 7 with a nozzle opening 8.
  • the peripheral groove 4 extends to the outer diameter of the nozzle extension 7.
  • the collar 5 has six openings 6, which in this embodiment are all formed with an identical bore diameter.
  • the total area of all openings 6 in the collar 5 corresponds to six times the illustrated area of such an opening 6 .
  • the air can flow as closely as possible to the water jet, which emerges from the nozzle opening 8 of the second flow channel 12' when the mixing nozzle 1 is in operation.
  • the inner part 3 comprises brass and is electrolytically chrome-plated.
  • Fig. 4 shows the section B-B of the embodiment of an inner part 3 from Fig. 3.
  • the inner part 3 has an inlet funnel 13 in the second flow channel 12'.
  • the specified flow direction is from left to right.
  • the inner part 3 has a collar 5 and a nozzle extension 7 with a nozzle opening 8 .
  • six axial openings 6 are formed in the collar 5 and in the illustration shown, two of the six evenly arranged openings 6 are shown in section.
  • the inlet funnel 13 is formed with a circular-arc curvature.
  • the hollow volume of the circumferential groove 4 can form a flow cavity in which pressure waves can oscillate.
  • the inner part 3 has an outer edge in the shape of a circular arc in the second flow channel 12 ′, so that the air can flow to the free water jet, which emerges from the nozzle opening 8 , essentially without flow breaks.
  • FIG. 5 shows the cross section of a first embodiment of a mixing nozzle 1 according to the invention, which comprises an outer part 2 and a substantially cylindrical inner part 3 arranged concentrically in the outer part 2 .
  • the mixing nozzle 1 is flowed through in the flow direction S from left to right in the illustration shown.
  • the inner part 3 has a central second flow channel 12 ′ with a nozzle opening 8 , a circumferential groove 4 on the outer circumference, a collar 5 with six openings 6 and a nozzle extension 7 .
  • the outer part 2 has a central first flow channel 12 which comprises a tapering first area 10 and a subsequent widening second area 11 .
  • the transition from the first region 10 to the second region 11 of the first flow channel 12 runs smoothly and is continuously curved, and in the direction of flow S the nozzle opening 8 is arranged in front of the constriction of the first flow channel 12 .
  • the first area 10 tapers convergently and the second area 11 widens divergently.
  • the openings 6 border on the inside tangentially to the diameter of the outer surface of the nozzle extension 7 . Furthermore, the openings 6 border tangentially on the outside of that inner diameter of the outer part 2 which essentially encloses the nozzle extension 7 and where the air enters the first flow channel 12 of the outer part 2 for the first time.
  • the second flow channel 12 ′ has a nozzle opening 8 and a rounded outer edge in the area of the nozzle extension 7 , so that the air can flow tightly around the nozzle extension 7 towards the nozzle opening 8 .
  • the inner part 3 and the outer part 2 are connected by a press connection according to DIN 8593.
  • the inner part 3 and the outer part 2 are manufactured with a surface finish with a mean roughness value that is less than Ra 1.6 according to DIN 3141.
  • FIG. 6 shows a three-dimensional oblique view of a first embodiment of a mixing nozzle 1 according to the invention, which is composed of an inner part 3 and an outer part 2 .
  • One of three uniformly arranged radial openings 9 and the mouth of the first flow channel 12 are visible in the illustration shown.
  • the other contours are shown in dashed lines as hidden edges.
  • the outer part 2 comprises brass and is electrolytically chrome-plated.
  • figs 7a-7c show a further embodiment of a mixing nozzle according to the invention in different views.
  • the openings 6 in the collar 5 each have a non-return valve which prevents liquid from flowing through the opening 6 counter to the direction of flow S and exiting through the radial opening 9 in the outer part 2 .
  • the opening 6 here comprises a funnel which widens in the direction of flow S and into which a stainless steel ball (not shown) is movably fitted. If the liquid flows against the flow direction S, then the stainless steel ball is pressed against the constriction 14 of the funnel and closes it. On the other hand, if air flows in the specified flow direction S, then the stainless steel ball releases the constriction 14 of the funnel.
  • the collar 5 bears against an inner edge of the outer part 2 with the expanded side of the funnel.
  • the stainless steel ball is thus stored between the constriction 14 and the inner edge of the outer part 2. Air can pass through the lateral recess 15 on the inner circumference of the collar 5 when the stainless steel ball releases the funnel.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne une buse de mélange (1) servant à mélanger un liquide en écoulement avec de l'air. Ladite buse de mélange comprend : une partie externe (2) sensiblement cylindrique ayant un premier canal d'écoulement central (12), qui s'étend dans la direction d'écoulement et présente une première région (10) effilée dans la direction d'écoulement et une seconde région (11) adjacente à la première région et étendue dans la direction d'écoulement, de telle sorte qu'un étranglement soit formé dans le premier canal d'écoulement (12) ; une partie interne sensiblement cylindrique (3) ayant un second canal d'écoulement central (12'), qui s'étend dans la direction d'écoulement, et qui est disposée concentriquement dans la partie externe (2) ; sur la périphérie externe de la partie interne (3), une rainure périphérique (4) et un collier (5) adjacent à la rainure périphérique et s'étendant radialement vers l'extérieur sont disposés ; le collier (5) présente au moins une ouverture (6) servant à l'introduction d'air dans le liquide ; l'ouverture radiale (9) mène dans la rainure périphérique (4) de la partie interne (3) ; le second canal d'écoulement (12') se termine en amont de l'étranglement du premier canal d'écoulement (12), par rapport à la direction d'écoulement.
PCT/AT2022/060408 2022-01-13 2022-11-22 Buse de mélange servant à mélanger un liquide avec de l'air WO2023133602A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50011/2022 2022-01-13
ATA50011/2022A AT525247B1 (de) 2022-01-13 2022-01-13 Mischdüse zum Mischen einer Flüssigkeit mit Luft

Publications (1)

Publication Number Publication Date
WO2023133602A1 true WO2023133602A1 (fr) 2023-07-20

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PCT/AT2022/060408 WO2023133602A1 (fr) 2022-01-13 2022-11-22 Buse de mélange servant à mélanger un liquide avec de l'air

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AT (1) AT525247B1 (fr)
WO (1) WO2023133602A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389593A (en) * 1920-03-05 1921-09-06 George A Millar Air-cushion nozzle
US2832577A (en) * 1957-01-15 1958-04-29 Wrightway Engineering Co Aerating device
DE10008438A1 (de) 2000-02-23 2001-08-30 Grohe Armaturen Friedrich Brausevorrichtung
WO2005054591A1 (fr) 2003-12-02 2005-06-16 Siegfried Kogelbauer Limiteur de debit
US20090266430A1 (en) * 2008-04-24 2009-10-29 Xiamen Lota International Co., Ltd. Air injection assembly for showers
WO2010116115A1 (fr) * 2009-04-09 2010-10-14 A L Challis Limited Aérateur
EP2381040A2 (fr) * 2010-04-22 2011-10-26 Caspro, S.A. Dispositif à vide pour robinets de douche et similaire
FR2968580A1 (fr) * 2010-12-14 2012-06-15 Robinetterie Mingori Dispositif melangeur pour installation de douche et installation de douche equipee d'un tel dispositif melangeur
CN108999993A (zh) * 2017-06-06 2018-12-14 邓鸣镛 节水器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799450A (en) * 1972-11-24 1974-03-26 C Braukman Aerator for hose type irrigation system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389593A (en) * 1920-03-05 1921-09-06 George A Millar Air-cushion nozzle
US2832577A (en) * 1957-01-15 1958-04-29 Wrightway Engineering Co Aerating device
DE10008438A1 (de) 2000-02-23 2001-08-30 Grohe Armaturen Friedrich Brausevorrichtung
WO2005054591A1 (fr) 2003-12-02 2005-06-16 Siegfried Kogelbauer Limiteur de debit
US20090266430A1 (en) * 2008-04-24 2009-10-29 Xiamen Lota International Co., Ltd. Air injection assembly for showers
WO2010116115A1 (fr) * 2009-04-09 2010-10-14 A L Challis Limited Aérateur
EP2381040A2 (fr) * 2010-04-22 2011-10-26 Caspro, S.A. Dispositif à vide pour robinets de douche et similaire
FR2968580A1 (fr) * 2010-12-14 2012-06-15 Robinetterie Mingori Dispositif melangeur pour installation de douche et installation de douche equipee d'un tel dispositif melangeur
CN108999993A (zh) * 2017-06-06 2018-12-14 邓鸣镛 节水器

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AT525247B1 (de) 2023-02-15
AT525247A4 (de) 2023-02-15

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