EP2277617A1 - Clapet de retenue Venturi combiné - Google Patents

Clapet de retenue Venturi combiné Download PDF

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Publication number
EP2277617A1
EP2277617A1 EP09165878A EP09165878A EP2277617A1 EP 2277617 A1 EP2277617 A1 EP 2277617A1 EP 09165878 A EP09165878 A EP 09165878A EP 09165878 A EP09165878 A EP 09165878A EP 2277617 A1 EP2277617 A1 EP 2277617A1
Authority
EP
European Patent Office
Prior art keywords
venturi
check valve
fluid
passage
valve
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.)
Withdrawn
Application number
EP09165878A
Other languages
German (de)
English (en)
Inventor
James Anthony Carter III
Peter Auld Mackay
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.)
Hayward Industries Inc
Original Assignee
Hayward Industries Inc
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 Hayward Industries Inc filed Critical Hayward Industries Inc
Priority to EP09165878A priority Critical patent/EP2277617A1/fr
Publication of EP2277617A1 publication Critical patent/EP2277617A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B01F23/2326—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 adding the flowing main component by suction means, e.g. using an ejector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
    • 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
    • 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
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
    • B01F23/237613—Ozone
    • 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
    • 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
    • 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
    • B01F2101/305—Treatment of water, waste water or sewage

Definitions

  • the present invention relates to a venturi valve for suctioning a composition, such as ozone, into the fluid circulation system of a swimming pool, spa, or other recreational body of water. More specifically, the present invention relates to a valve for a fluid circulation system that includes any one of a plurality of different pumps having disparate pumping rates.
  • a venturi is an apparatus commonly used to draw a substance, e.g., a composition, into a fluid by use of a pressure difference.
  • a venturi can be directly contained within a principal flow path.
  • a disadvantage to the full-flow set-up of FIG. 1 is that the pressure drop created across the venturi to form a suctioning vacuum also undesirably acts as a backpressure across the fluid circulation system.
  • bypass set-up of FIG. 2
  • an effort has been made in the prior art to inhibit such backpressure by configuring the venturi with a bypass loop. In the bypass set-up of FIG.
  • the preferred combination venturi check valve includes a fluid inlet, a fluid outlet, a bypass passage, and a venturi passage.
  • the bypass passage is preferably provided with a check valve movable between a plurality of positions for automatically adjusting the flow rate of fluid through the bypass passage.
  • the venturi passage can be provided with a suction inlet for suctioning a composition into a fluid flowing through the venturi passage.
  • the bypass and venturi passages may be inline between the fluid inlet and the fluid outlet, and, in some aspects of the invention, the bypass and venturi passages may share a common wall.
  • the venturi passage may include a venturi passage inlet side parallel with the bypass passage, and, in some aspects of the invention, the venturi passage may include a venturi passage outlet side having an opening angled with respect to the bypass passage.
  • the combination venturi check valve defines a mixing chamber positioned between the fluid outlet and the venturi and bypass passages.
  • the combination venturi check valve 10 includes a housing 12, a valve assembly 14, and a venturi device 16, each of which shall be discussed below with further detail.
  • the combination venturi check valve 10 includes a generally cylindrical pipe housing 12 having a fluid inlet 18, a fluid outlet 20, and a common wall 22 extending therebetween to define a bypass passage 24 and a venturi passage, the latter of which comprises two areas that are referenced herein as a venturi passage inlet side 26 and a venturi passage outlet side 28.
  • the venturi passage inlet side 26 is preferably substantially parallel with respect to the bypass passage 24.
  • a chamber referenced herein as mixing chamber 30 is preferably positioned between the fluid outlet 20 and the passages. Fluid preferably flows from at least one of the passages to the mixing chamber 30 tangentially to enhance mixing and homogeneity.
  • the housing 12 is preferably monolithically formed from plastic or metal, though it is contemplated that the housing 12 can comprise a plurality of assembled components, such as an inlet half or portion and an outlet half or portion, for example.
  • the housing 12 can be provided with means for securing the housing 12 in fluid communication with the fluid circulation system. As shown in FIGS. 3-8B , for example, such means can include, at the fluid inlet 18, threading 32 to be secured with corresponding threading of the fluid circulation system, and, at the fluid outlet 20, an annular groove 34 for receiving a corresponding annular lip of the fluid circulation system. Seals can be provided for efficient communication of fluids.
  • the bypass passage 24 and venturi passage are provided inline with the fluid inlet 18 and the fluid outlet 20.
  • fluid flowing into the fluid inlet 18 flows substantially straight into both the bypass passage 24 and the venturi passage inlet side 26, and fluid flows substantially straight out of the mixing chamber 30 through the fluid outlet 20.
  • the inline configuration inhibits turbulence, enhances laminar flow, and contributes to overall efficiencies.
  • the common wall 22 can be provided to subdivide the interior of the pipe housing 12 into the bypass passage 24 and the venturi passage, and, in some embodiments, the common wall 22, which can be formed integrally as part of the housing 12, contributes to the compactness and portability of the combination venturi check valve 10.
  • the venturi passage outlet side 28 preferably includes an angled opening 36 for inducing tangential flow from the venturi passage outlet side 28 to the mixing chamber 30.
  • the venturi passage is provided with means for suctioning a composition into fluid flowing through the venturi passage.
  • the venturi device 16 can be positioned within the venturi passage.
  • the venturi device 16 is positioned within the venturi passage inlet side 26. Water flows through the venturi passage inlet side 26 to the venturi device 16 and therefrom through the venturi passage outlet side 28.
  • the venturi device 16 comprises a constricted section and a suction inlet 38 proximal the constricted section for suctioning a composition, such as ozone, through the suction inlet 38 from a composition reservoir, such as an ozone dispensing unit, into the fluid flow.
  • the suction inlet 38 is aligned with and in fluid communication with a hole 40 formed in the housing 12, which is in further fluid communication with the composition reservoir.
  • the hole 40 can be threaded to securingly receive a secondary check valve (not shown) positioned between the composition reservoir and the suction inlet 38 and allowing one-way fluid communications from the composition reservoir to the suction inlet 38.
  • an interference fit can be formed by the cooperation of a step formed in the common wall 22 and a seat (not designated) formed in the venturi device 16.
  • a plurality of O-rings 42 can be provided. It is contemplated that alternative and/or additional means can be provided with respect to the venturi device 16. For example, it is contemplated that those inner surfaces defining the venturi passage can themselves form the constricted section for inducing the venturi effect.
  • the housing 12 and the means for suctioning can be formed of different materials.
  • the venturi device 16 for example, can be formed of a material resistant to that composition that would be sucked therethrough.
  • the venturi device 16 can be formed of a material resistant to the corrosive properties of ozone, such as those materials manufactured by Kynar, e.g., polyvinylidene fluoride (PVDF).
  • Kynar e.g., polyvinylidene fluoride
  • the secondary check valve (not shown) positionable between the suction inlet 38 and composition reservoir can additionally or alternatively be formed of a Kynar material, e.g., PVDF.
  • the combination venturi check valve 10 is provided with a mount 44 for securing the valve assembly 14 relative to the housing 12.
  • the mount 44 is included as an integral portion of a monolithic housing 12.
  • the mount 44 can extend from the common wall 22 to an opposing wall of the housing 12 that cooperates therewith to define the bypass passage 24.
  • the mount 44 includes an area, referenced herein as a spring seat 46, which has a borehole for securing the housing 12 to the valve assembly 14, while permitting the valve assembly 14 to alter its state between a plurality of positions.
  • the valve assembly 14 preferably includes a valve head 48, a valve stem 50, a compression spring 52, a spring retainer 54, and a fastener 56, each of which shall be discussed below with further detail.
  • the valve head 48 is preferably sized and dimensioned to, when in a closed position, obstruct fluid flow from the bypass passage 24 to the fluid outlet 20 (and the mixing chamber 30), while allowing fluid flow from the venturi passage outlet side 28 to the fluid outlet 20.
  • the bypass passage 24 and the valve head 48 are configured to form a seal in the closed position.
  • the valve head 48 can include a valve head wall 58 defining an open area 60, and the valve head 48 is aligned with the passages such that the valve head wall 58 can alternatively obstruct and allow fluid flow from the bypass passage 24 to the fluid outlet 16, while the open area 60 continuously allows fluid flow from the venturi passage outlet side 28 to the fluid outlet 20.
  • a keyed hole 62 can be formed in the valve head wall 58, and a complementary rib 64 can be formed in the housing 12 for guiding alignment of the valve head 48 and to facilitate reciprocation that is substantially linear.
  • the valve stem 50 extends from the valve head 48 and through a bore or opening formed in the spring seat 46 of the mount 44.
  • the radius of the bore in the spring seat 46 is just greater than a radius of the valve stem 50 to guide sliding, linear reciprocation of the valve stem 50, while inhibiting lateral motion thereof.
  • the mount 44 can function to guide the valve.
  • the valve stem 50 can be further configured so as to prevent or inhibit rotation of the valve head 48.
  • the valve stem 50 can be shaped as a hexagon, and the borehole formed in the spring seat 46 of the mount 44 can be correspondingly shaped as a hexagon to inhibit rotation.
  • the valve stem 50 has a threaded hole opposing the spring seat 46 of the mount 44, and the fastener 56 extends through the hole to secure the spring retainer 54 to the valve stem 50.
  • the radius of the valve stem 50 is less than the radius of the spring retainer 54 (and the radius of the valve stem 50 is less than the radius of the spring seat 46).
  • the compression spring 52 is positioned about the valve stem 50 between the spring retainer 54 and the spring seat 46.
  • the fluid inlet 18 of the combination venturi check valve 10 is secured in fluid communication with an outlet of the fluid circulation system
  • the fluid outlet 20 of the combination venturi check valve 10 is secured in fluid communication with an inlet of the fluid circulation system.
  • the valve assembly 14 is movable from a closed position, in which fluid flow from the bypass passage 24 to the fluid outlet 20 (and the mixing chamber 30) is obstructed, to one of a plurality of open positions, such as a partially-open position or a fully-open position, in which varying amounts of fluid flow are allowed to flow from the bypass passage 24 to the fluid outlet 20 (and the mixing chamber 30).
  • the venturi passage outlet side 28 preferably includes the angled opening 36 so as to provide a tangential flow for enhancing mixing and homogeneity, preferably prior to exit of the fluid through the fluid outlet.
  • the position of the valve assembly 14 is dependent at least in part on the force of the fluid pressure against the valve head wall 58 of the valve head 48, which is in turn at least partially dependent on fluid flow rate, and which is in turn at least partially dependent upon the pumping rate of that pump which has been included as part of the fluid circulation system.
  • the compression spring 52 have a spring rate between about forty pounds per inch (40 Ibs/in) and about fifty-five pounds per inch (55 Ibs/in) for an operational flow rate between about ten gallons per minute (10 GPM) to about one-hundred-and-ten gallons per minute (110 GPM) and a venturi air suction of about six cubic feet per hour (6 SCFH) to about seven cubic feet per hour (7 SCFH).
  • the valve assembly 14 or other valve/throttle mechanism is preferably contained within the pipe housing 12 and inserted into the mount 44.
  • the valve assembly 14 or other valve/throttle mechanism is capable of moving within the housing 12 between an open and closed position.
  • the movement of the valve assembly 14, for example, is regulated by the compression spring 52 held in place by the spring retainer 54 that is attached to the valve stem 50 of the valve assembly 14.
  • the spring retainer 54 can be adjustable such that the compression spring 52 can be preloaded with compression to change the opening rate of the valve assembly 14 so as to enable the valve assembly 14 or other valve/throttle mechanism to resist opening due to flow in order to maintain pressure for the venturi.
  • valve/throttle mechanism e.g., the valve assembly 14
  • the valve/throttle mechanism will open based on the spring rate of the compression spring 52.
  • the flow exiting the bypass passage 24 is preferably directed into the path of the flow from the venturi passage outlet side 28 at a chamber in the housing 12 proximal the fluid outlet 20.
  • valve assembly 14 By containing a venturi and a pressure-operated valve within a single unit, for example, many drawbacks of the prior art can be overcome. For example, with respect to the embodiment of FIGS. 3-8B , if the fluid flow from the fluid circulation system drops, the valve assembly 14 can close completely or partially, thereby reducing the amount of flow within the bypass passage 24. This increases the pressure at the venturi suction inlet 38 to provide desired suction rates. If the fluid flow from the fluid circulation system increases, the valve assembly 14 opens (or opens further) to release the excess pressure build up. In this regard, preferred embodiments of the invention are particularly useful for configurations in which variable flow rates are desirable, where the benefits of both a bypass set-up and the benefits of a full flow set-up are sought in one set-up.
  • apparatus and methods are provided for maintaining a relatively constant venturi inlet pressure by use of a pressure sensitive check valve in an "all-in-one" unit.
  • a fluid traveling at a given pressure enters the apparatus, such as the combination venturi check valve 10 of FIGS. 3-8B , and is regulated by a valve/throttle mechanism, such as the valve assembly 14 of FIGS 3-8B .
  • the valve throttle mechanism is sized such that it preferably maintains the ideal inlet pressures for the venturi.
  • the valve throttle mechanism restricts flow to create optimal venturi pressure. If the optimal amount of pressure is surpassed, the valve mechanism will open a determined amount depending on the increase in pressure (and the spring rate, for example). The amount the valve mechanism opens will determine at least in part the decrease in pressure at the venturi. This reduces the pressure to the optimal amount at any given inlet pipe pressure induced by different pumping rates.
  • the combination venturi check valve 10 inhibits excess back pressure created through the venturi and the fluid circulation system to maintain a substantially constant suction rate.
  • Flow from the outlet of the bypass area such as the bypass passage 24 of FIGS. 3-8A , will then be directed with the main flow of the venturi passage outlet side 28 proximal the fluid outlet 20 of the housing 12.
  • a chamber e.g., mixing chamber 30
  • This also reduces the amount of back pressure created at higher flow rates.
  • Embodiments of the invention additional to those shown in FIGS. 3-8B are contemplated.
  • one or more seal(s) can be provided to the outer edge of the combination venturi check valve 10 (or in other positions) to inhibit or prevent fluid or composition leakage.
  • the present invention can be used in water treatment contexts outside of ozonation of swimming pool water.
  • valve means in addition to or alternative to the valve assembly 14 and/or components thereof can be utilized.
  • the valve means can be provided as a throttle plate capable of rotating as flow increases. The amount of rotation between a closed position and a plurality of open positions can be regulated by a torsion spring that resists the flow of fluid through a bypass passage.
  • the throttle plate can be provided as an impeller shaped to induce a rotational effect for facilitating mixing.
  • a combination venturi check valve can be provided such that a venturi can be contained within a valve placed at the center of the housing in a parallel path to the bypass area of the housing.
  • the bypass area is regulated by means of the sliding valve that restricts flow up to a given pressure.
  • the movement of this valve between open and closed position is controlled by a compression spring that resists the fluids path.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP09165878A 2009-07-20 2009-07-20 Clapet de retenue Venturi combiné Withdrawn EP2277617A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09165878A EP2277617A1 (fr) 2009-07-20 2009-07-20 Clapet de retenue Venturi combiné

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09165878A EP2277617A1 (fr) 2009-07-20 2009-07-20 Clapet de retenue Venturi combiné

Publications (1)

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EP2277617A1 true EP2277617A1 (fr) 2011-01-26

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014089404A1 (fr) 2012-12-07 2014-06-12 Ecolab Usa Inc. Système de gestion du déplacement de produits liquides
RU2577676C1 (ru) * 2015-04-29 2016-03-20 Частное образовательное учреждение дополнительного профессионального образования "Саранский Дом науки и техники Российского Союза научных и инженерных общественных организаций" (ЧОУ ДПО "Саранский Дом науки и техники РСНИИОО") Система химводоподготовки
US11084745B1 (en) 2021-02-17 2021-08-10 Aquastar Pool Products, Inc. Ozone injector device
US11358888B1 (en) 2021-02-17 2022-06-14 Aquastar Pool Products, Inc. Ozone injector device
EP4091706A1 (fr) * 2021-05-20 2022-11-23 PURITECH Co., Ltd Appareil à buse venturi
USD972069S1 (en) 2021-02-17 2022-12-06 Aquastar Pool Products, Inc. Ozone injector device
EP4112159A1 (fr) * 2021-07-01 2023-01-04 Sio Co., Ltd. Structure interne, appareil de changement de caractéristique de fluide et appareil d'utilisation associé
US11905191B1 (en) 2021-02-17 2024-02-20 Aquastar Pool Products, Inc. Ozone injector device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170818A (en) * 1991-11-25 1992-12-15 Westinghouse Air Brake Company Safety valve
US6162021A (en) * 1993-09-06 2000-12-19 B.H.R. Group Limited System for pumping liquids using a jet pump and a phase separator
WO2002001970A2 (fr) * 2000-06-30 2002-01-10 Fmc Corporation Appareil de chauffage a injection de vapeur et procede
WO2006027145A1 (fr) * 2004-09-03 2006-03-16 Kenneth Smith Dispositif pour enrichir une substance, en particulier de l'eau ou de l'air, au moyen d'ozone
US7125003B1 (en) * 2004-02-25 2006-10-24 Kemp E Falkner Liquid treatment injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170818A (en) * 1991-11-25 1992-12-15 Westinghouse Air Brake Company Safety valve
US6162021A (en) * 1993-09-06 2000-12-19 B.H.R. Group Limited System for pumping liquids using a jet pump and a phase separator
WO2002001970A2 (fr) * 2000-06-30 2002-01-10 Fmc Corporation Appareil de chauffage a injection de vapeur et procede
US7125003B1 (en) * 2004-02-25 2006-10-24 Kemp E Falkner Liquid treatment injector
WO2006027145A1 (fr) * 2004-09-03 2006-03-16 Kenneth Smith Dispositif pour enrichir une substance, en particulier de l'eau ou de l'air, au moyen d'ozone

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014089404A1 (fr) 2012-12-07 2014-06-12 Ecolab Usa Inc. Système de gestion du déplacement de produits liquides
EP2928509A4 (fr) * 2012-12-07 2016-07-13 Ecolab Usa Inc Système de gestion du déplacement de produits liquides
US9475017B2 (en) 2012-12-07 2016-10-25 Ecolab Usa Inc. System for handling displacement of liquid products
RU2577676C1 (ru) * 2015-04-29 2016-03-20 Частное образовательное учреждение дополнительного профессионального образования "Саранский Дом науки и техники Российского Союза научных и инженерных общественных организаций" (ЧОУ ДПО "Саранский Дом науки и техники РСНИИОО") Система химводоподготовки
USD992080S1 (en) 2021-02-17 2023-07-11 Aquastar Pool Products, Inc. Ozone injector device
US11820683B1 (en) 2021-02-17 2023-11-21 Aquastar Pool Products, Inc. Ozone injector device
US11345623B1 (en) 2021-02-17 2022-05-31 Aquastar Pool Products, Inc. Ozone injector device
US11358888B1 (en) 2021-02-17 2022-06-14 Aquastar Pool Products, Inc. Ozone injector device
US11235996B1 (en) 2021-02-17 2022-02-01 Aquastar Pool Products, Inc. Ozone injector device
US11518697B1 (en) 2021-02-17 2022-12-06 Aquastar Pool Products, Inc. Ozone injector device
USD972069S1 (en) 2021-02-17 2022-12-06 Aquastar Pool Products, Inc. Ozone injector device
US11905191B1 (en) 2021-02-17 2024-02-20 Aquastar Pool Products, Inc. Ozone injector device
US11084745B1 (en) 2021-02-17 2021-08-10 Aquastar Pool Products, Inc. Ozone injector device
USD993355S1 (en) 2021-02-17 2023-07-25 Aquastar Pool Products, Inc. Ozone injector device
USD997296S1 (en) 2021-02-17 2023-08-29 Aquastar Pool Products, Inc. Ozone injector device
EP4091706A1 (fr) * 2021-05-20 2022-11-23 PURITECH Co., Ltd Appareil à buse venturi
US12005406B2 (en) 2021-05-20 2024-06-11 Puritech Co., Ltd. Venturi nozzle apparatus
EP4112159A1 (fr) * 2021-07-01 2023-01-04 Sio Co., Ltd. Structure interne, appareil de changement de caractéristique de fluide et appareil d'utilisation associé

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