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WO2024121181A1 - Ensemble valve pour unité de distribution de liquide et unité de distribution de liquide pour système de purification d'eau - Google Patents

Ensemble valve pour unité de distribution de liquide et unité de distribution de liquide pour système de purification d'eau Download PDF

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Publication number
WO2024121181A1
WO2024121181A1 PCT/EP2023/084409 EP2023084409W WO2024121181A1 WO 2024121181 A1 WO2024121181 A1 WO 2024121181A1 EP 2023084409 W EP2023084409 W EP 2023084409W WO 2024121181 A1 WO2024121181 A1 WO 2024121181A1
Authority
WO
WIPO (PCT)
Prior art keywords
disc
valve assembly
window
rotational position
dispensing unit
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.)
Ceased
Application number
PCT/EP2023/084409
Other languages
English (en)
Inventor
Agnes DE VARINE
Thierry CASSOU
Laurent Moreau
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.)
Merck Patent GmbH
Original Assignee
Merck Patent 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 Merck Patent GmbH filed Critical Merck Patent GmbH
Priority to EP23818052.5A priority Critical patent/EP4630713A1/fr
Priority to CN202380093653.6A priority patent/CN120659941A/zh
Priority to JP2025533379A priority patent/JP2025538793A/ja
Publication of WO2024121181A1 publication Critical patent/WO2024121181A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
    • F16K3/06—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/34—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve

Definitions

  • the present invention relates to a valve assembly for a liquid dispensing unit and to a liquid dispensing unit for a water purification system as well as to a water purification system as such.
  • solenoid valves Most existing water purification and distribution systems for ultrapure water use a solenoid valve to control the opening and closing of the dispensing unit.
  • solenoid valves only have an on-off setting. Therefore, some devices couple this solenoid valve with a motorized valve to allow a user to precisely control the dispense flowrate, from drop-by-drop (or “dropwise") dispensing to high flowrates.
  • the solenoid valve and the motorized valve can be integrated together in the dispensing unit, or the motorized valve can be placed in a remote main system and only the solenoid valve in the dispensing unit.
  • a PCB printed circuit board
  • electronics must be integrated in the dispensing unit, with power transferred from the remote main system to the distribution or dispensing unit;
  • a motorized valve coupled with several solenoid valves only allows for one flowrate setting at a time and it is not possible to set different flowrates for the different distribution or dispensing units.
  • Valve assemblies with pairs of ceramic discs with openings, windows or pockets opened and closed by relative rotation of the discs are commonly used in fluid distribution systems. One disc is kept fixed in a housing, while the other one is mobile and is driven in rotation to align or separate the disc openings, windows, or pockets in order to let fluid flow through the valve assembly or not.
  • the invention aims at providing a valve assembly for a liquid dispensing unit and a liquid dispensing unit for a water purification system, solving at least one of the problems associated with existing solutions.
  • the invention in particular aims at providing a valve assembly for a liquid dispensing unit and a liquid dispensing unit for a water purification system (preferably a pure or ultrapure water purification and dispensing system), that can control opening and closing of the distribution as well as the flow rate of distribution down to drop-by-drop (or “dropwise") dispensing while reducing the size, costs and environmental impact by reducing the number of components and avoiding electronics, further allowing an easy, ergonomic operation, and/or an easy and robust assembly.
  • a water purification system preferably a pure or ultrapure water purification and dispensing system
  • the present invention provides a valve assembly for a liquid dispensing unit as defined by claim 1 and a liquid dispensing unit for a water purification system as defined by claim 15.
  • Preferred embodiments of the valve assembly and of the liquid dispensing unit are defined in the dependent claims.
  • the present invention in particular provides a valve assembly for a liquid dispensing unit comprising a pair of first and second discs to be rotated relative to each other with mutually facing first and second sealing contact surfaces arranged to at least partly slide in contact with each other, wherein the first disc has at least one window, wherein the second disc has a solid portion arranged to completely cover and thus to close the at least one window of the first disc in a fully closed rotational position, and an opening portion arranged to at least partially expose the at least one window of the first disc in a fully open rotational position.
  • the solid portion of the second disc that is arranged to completely cover to close the at least one window of the first disc in the fully closed rotational position is formed so as to include a portion of the second sealing contact surface that overlaps the first sealing contact surface of the first disc surrounding an edge of the window by a sealing zone with a width of at least 1.5 mm, preferably at least 2.0 mm.
  • the first and second sealing contact surfaces of the pair of first and second discs arranged to at least partly slide in contact with each other have a surface roughness Ra of at most 0.60 pm, and/or a surface flatness of at most 0.80 pm, and are preferably polished or ground.
  • the mutually facing first and second sealing contact surfaces of the pair of first and second discs are arranged such that a percentage of 50-80%, preferably 55-75%, most preferably 60-70% of the first and second sealing contact surfaces are sliding in contact with each other between the fully closed rotational position and the fully open rotational position.
  • the second disc is freely floating in contact with the first disc or is biased towards the first disc by a biasing member.
  • the at least one window of the first disc has a notch/dent recessed into the material of the first disc from the plane defined by the first sealing contact surface of the first disc at an/the edge of the at least one window at a side where the exposure of the at least one window starts upon movement of the second disc from the fully closed rotational position in the direction towards the fully open rotational position.
  • the notch/dent has a pointed tip widening and/or deepening gradually towards the at least one window.
  • the at least one window has an inclination or ramp at a sidewall adjacent to a/the side where the exposure of the at least one window starts upon movement of the second disc from the fully closed rotational position in a/the direction towards the fully open rotational position such that the free opening width of the at least one window in the thickness direction of the first disc becomes gradually narrower with distance from the plane of the first sealing contact surface.
  • the valve assembly is dimensioned so as to provide, within the rotational angular range of the relative movement between the fully closed rotational position and the fully open rotational position, a flowrate through the at least one window from dropwise, preferably 20 mL/min, up to 2 L/min.
  • the rotational angular range between the fully closed rotational position and the fully open rotational position is 50°-70°, preferably 55°-65°, and most preferably about 60°.
  • the first disc is provided with positioning notches for preventing a rotation and defining a mounting position in a receptacle of a liquid dispensing unit, the positioning notches being formed and/or arranged unsymmetrical about a circumference of the first disc.
  • the second disc is provided with one or more driver recess/recesses and/or protrusion/protrusions on a side opposite to the second sealing contact surface, for engagement with a rotary actuator of a liquid dispensing unit.
  • the first disc has a circular outer periphery
  • the second disc has a noncircular outer periphery with the opening portion arranged to at least partially expose the at least one window of the first disc radially recessed from the outer periphery.
  • the first disc and/or the second disc are made of a ceramic material, preferably aluminum oxide ceramic.
  • the present invention in particular also provides a liquid dispensing unit for a water purification system, comprising a supply piping for purified water, an outlet for purified water, and a valve assembly according to the invention arranged in a receptacle of a housing such that the valve assembly can control the volume or rate of the flow of purified water from the supply piping to the outlet.
  • the first disc of the valve assembly is rotationally fixed in position within the receptacle such that the at least one window communicates with the outlet, and the second disc is mounted in the receptacle so as to freely float in contact with the first disc and such that the first and second sealing contact surfaces are pressed against each other by the water pressure from the supply piping acting on the second disc.
  • the second disc of the valve assembly is engaged with a manually operable rotary actuator for rotatingly driving the second disc relative to the first disc between the fully closed rotational position and the fully open rotational position.
  • the present invention provides a water purification system comprising such liquid dispensing unit as defined herein.
  • Fig. 1 shows a perspective schematic view of an exemplary first disc of a valve assembly.
  • Fig. 2 shows a perspective schematic view of an exemplary second disc of the valve assembly.
  • Fig. 3 shows a schematic top view of the valve assembly with the first and second discs of Figures 1 and 2 superposed on each other.
  • Fig. 4 shows a schematic partial cross-sectional side view of an exemplary dispensing unit provided with the valve assembly.
  • Fig. 5 shows a schematic cross sectional top view of the exemplary dispensing unit with the valve assembly in the closed position (left view) and in the open position (right view).
  • the valve assembly of the present invention is a mechanical valve including a single pair of discs, preferably made from ceramic material, that can be integrated in the dispensing unit of water purification systems to replace both, the motorized valve and the solenoid valve.
  • This single pair of discs can be used to control both, the opening and closing of the flow through the valve assembly, as well as the dispensing flowrate from dropwise dispensing to high flowrates, i.e. from 20 mL/min to 2 L/min.
  • the size of the dispensing unit can be reduced by removing the solenoid valve (and the motorized valve if provided) and the PCB from the dispensing unit and/or the distribution unit - this provides an improved ergonomic handling of the dispensing unit;
  • the number of components and the complexity of the dispensing unit and/or the distribution unit can be reduced - in particular, avoiding the electronics means that no power or control circuits must be provided from the main system with the purification stage to the dispensing unit and a connection between the main system to the dispensing unit may be reduced to a dual or single tubing instead of two tubings and electronic cables, which all have to be integrated in an outer sleeve or bound together by suitable means as, for example, cable ties;
  • valve assembly and the liquid dispensing unit provided with it provide for a simplified and more robust, i.e. error free assembly
  • valve assembly and the liquid dispensing unit provided with it enhance the freedom of design: having electronic parts close to hydraulic components in a small and closed space is a risk. This constrains the design of water distribution or dispensing units, forcing a flow entry from the lower part of a gun in most existing products.
  • the lack of electronics made possible by the use of a mechanical valve assembly simplifies the constraints on the design of the distribution or dispensing unit and lowers the risks from that perspective.
  • valve assembly for a liquid dispensing unit and the liquid dispensing unit for a water purification system of the invention are now described in connection with an exemplary embodiment.
  • the valve assembly 10 for a liquid dispensing unit 1 (see Fig. 4) comprises a pair of first and second discs 11,12 to be rotated relative to each other with mutually facing first and second sealing contact surfaces 11a, 12a arranged to at least partly slide in contact with each other.
  • the first disc 11 has at least one window 13a, 13b (two in the embodiment at positions opposite to each other through the center of the disc).
  • the second disc 12 has a solid portion 14a, 14b arranged to completely cover and thus to close in an axial direction the at least one window 13a, 13b of the first disc 11 in a fully closed rotational position (shown in Fig. 3), and an opening portion 15a, 15b arranged to at least partially expose the at least one window 13a, 13b of the first disc 11 upon relative rotation in a progressing manner until it is positioned in a fully open rotational position.
  • two solid portions 14a, 14b and two opening portions 15a, 15b are provided in the embodiment complementary to the two windows 13a, 13b of the first disc.
  • the number can be one each or more than two distributed about a circumference.
  • the windows 13a, 13b extend through the thickness of the first disc in the axial direction and serve as flow paths for the fluid through the valve assembly in the axial direction as described later.
  • the solid portion(s) 14a, 14b of the second disc 12 that is/are arranged to completely cover and thus to close the window(s) 13a, 13b of the first disc 11 in the fully closed rotational position is/are formed so as to include a portion of the second sealing contact surface 12a that overlaps the first sealing contact surface 11a of the first disc 11 within a closed sealing zone 16a, 16b, respectively surrounding an edge 13c, 13d of the window(s) 13a, 13b.
  • the sealing zone 16a, 16b has a width of at least 1.5 mm, preferably at least 2.0 mm, measured perpendicularly to the edge or more precisely perpendicularly to a tangent to the edge within the planes of the first and second sealing contact surfaces 11a, 12a to guarantee sealing in the fully closed position (see Fig. 3).
  • Sealing with the receptacle of a housing of a dispensing unit in which the valve assembly is integrated is achieved on the surface opposite to the first sealing contact surface 11a of the first disc 11 (which may be the lower surface of the first disc if arranged as the lower disc in the example of Fig. 4) and therefore requires a certain circular area on the outside of the surface with no openings.
  • the first disc 11 and/or the second disc 12 are preferably made of a ceramic material.
  • the type of ceramic material used is to be selected to avoid any contamination to the ultrapure water.
  • Aluminum oxide ceramic is a suitable and preferred material.
  • another material including metal or alloys or a different base material with a suitable coating including a ceramic coating are possible.
  • the first disc 11 in the embodiment has a circular outer periphery and the second disc 12 has a non-circular outer periphery with the opening portion 15a, 15b arranged to at least partially expose the at least one window 13a, 13b of the first disc 11 radially recessed from the outer periphery (see Fig. 2).
  • the discs may, however, have a peripheral shape other than circular. If the peripheral shape is "not round", it may facilitate holding at least one disc (i.e. the stationary disc) in a receptacle of a dispensing unit to prevent rotation by engagement with a suitable corresponding shape of a recess or a protrusion.
  • the first disc 11 is provided with positioning notches 17a, 17b at an outer periphery for preventing - in a mounted state in a receptacle 2 of the dispensing unit 1 as shown in Fig. 4 - a rotation and for defining a unique mounting position in the receptacle 2.
  • the positioning notches 17a, 17b are formed and/or arranged asymmetrically about a circumference of the first disc 11 in order to define the unique mounting position.
  • the second disc 12 is provided with one or more driver recess/recesses 18a, 18b and/or protrusion/protrusions (not shown) on a side opposite to the second sealing contact surface 12a in the axial direction, for engagement with a rotary actuator 3 of the liquid dispensing unit 1.
  • the recesses 18a, 18b are shallow pockets or grooves with a closed bottom that do not extend through the thickness of the second disc in the axial direction.
  • the rotary actuator 3 is provided with matching protrusions 3a, 3b (see Fig. 4) for engaging with the recesses 18a, 18b.
  • the shape or contour of the recesses 18a, 18b and matching protrusions 3a, 3b is unsymmetrical in order to define a unique mounting orientation or more precisely a defined rotational position of the actuator 3 where the engagement is possible.
  • the sealing properties of the discs 11, 12 depend mainly on the percentage of the sealing contact surfaces 11a 12a of the discs that are effectively in contact at the microscopic level.
  • the disc sealing contact surfaces are therefore processed to reach a pre-set percentage of the surfaces in contact between the two discs. A percentage that is too low would compromise sealing, and a percentage too high would cause excessive efforts of operation.
  • this percentage of the disc surfaces in contact, together with the water pressure and the friction forces of the seal on the driving actuator are the only parameters that influence the operation efforts.
  • the first and second sealing contact surfaces 11a, 12a of the pair of first and second discs 11,12 that are arranged to at least partly slide in contact with each other have a surface quality or surface roughness Ra of at most 0.60 pm, more preferably of at most 0.50 pm, most preferably of at most 0.40 pm, and/or a flatness of at most 0.80 pm, preferably of at most 0.70 pm, most preferably of at most 0.60 pm, to create the fluid-tight sealing upon contact.
  • the first and second sealing contact surfaces 11a, 12a of the pair of first and second discs 11,12 are polished or ground.
  • first and second sealing contact surfaces 11a, 12a of the pair of first and second discs 11,12 are arranged such that a percentage of 50-80%, preferably 55- 75%, and most preferably 60-70% of the first and second sealing contact surfaces 11a, 12a are sliding in contact with each other between the fully closed rotational position and the fully open rotational position.
  • valve assembly is to be integrated in a water dispensing unit, for example in the form of a "gun" that the user will hold with just one hand and operate with his thumb within a relatively small angular moving range, low operation forces are critical. This differs from similar fluid valves that are driven by a motor or ones where a full hand is used to operate the valve, on a large angular range.
  • the second disc 12 is arranged as an upper disc and is preferably mounted freely floating in contact with the first disc 11 in order to minimize forces of operation of the water dispensing unit.
  • Reduced forces and improved ergonomics of operation also can be achieved not only by the optimization of the disc properties and the integration with the freely floating second or upper disc, but also by an optimization of the rotating seal on the driving actuator.
  • a biasing member for example an elastic member like an elastic seal (for example an O-ring) or spring arranged between the driving actuator 3 and the upper surface of the second disc 12.
  • biasing member could, forexample, be arranged in the space between the protrusions 3a, 3b and the upper surface of the second disc 12 (not shown in the drawing).
  • the disc design and the disc properties are optimized to enable a wide range of flowrates: good sealing must be achieved in the fully closed position and flowrates from stable and easy to reach dropwise dispensing up to 2 L/min when the valve assembly is fully open, with limited pressure drops are provided on a limited ergonomic angular range that allows operation when the liquid dispensing unit is to be used with just one hand and operated with the thumb, while the rest of the hand holds the device.
  • the discs of the valve assembly in particular the dimensions and arrangement of the window(s) 13a, 13b, of the solid portions 14a, 14b and of the opening portions 15a, 15b are thus configured to provide a rotational angular range between the fully closed rotational position and the fully open rotational position to be between 50°-70°, preferably 55°-65°, and most preferably about 60°.
  • the valve assembly 10 is dimensioned so as to provide, within the rotational angular range of the relative movement between the fully closed rotational position and the fully open rotational position, a flowrate through the at least one window (13a, 13b) from dropwise, preferably 20 mL/min, up to 2 L/min.
  • the at least one window 13a, 13b of the first disc 11 has a notch/dent 13e recessed into the material of the first disc 11 from the plane defined by the first sealing contact surface 11a of the first disc 11 at an/the edge 13c, 13d of the at least one window 13a, 13b that is located at a side where the exposure of the at least one window 13a, 13b starts upon movement of the second disc 12 from the fully closed rotational position in the direction towards the fully open rotational position (see Figs. 1 and 3).
  • only one of the windows 13a, 13b of the first disk 11 has a notch/dent 13e. Nevertheless, depending upon specific requirements both windows 13a, 13b or - if disk 11 has more than two windows - any number of these may have such a notch/dent.
  • the notch/dent 13e has a pointed sharp tip that gradually and continuously widens in a horizontal direction defined by the extension of the plane of the first sealing contact surface and/or deepens gradually towards the at least one window 13a, 13b in the direction perpendicular to that plane.
  • the surface of the cross section of the notch/dent 13e increases towards the at least one window 13a, 13b in the circumferential direction of the first disc 11.
  • the at least one window 13a, 13b has an inclination or ramp 13f at a sidewall adjacent to the side where the exposure of the at least one window 13a, 13b starts upon movement of the second disc 12 from the fully closed rotational position in the direction towards the fully open rotational position such that the free opening width or surface of the cross section of the at least one window 13a, 13b in the thickness or axial direction of the first disc 11 becomes gradually narrower over at least a certain range with distance from the plane of the first sealing contact surface 11a.
  • valve assembly of the invention is in particular designed and advantageous for use in a liquid dispensing unit 1 for a water purification system.
  • the integration of the valve arrangement in a preferred embodiment of a liquid dispensing unit 1 is at least partially shown in the cross-sectional view of Fig. 4.
  • the liquid dispensing unit 1 that is in the form of a "gun" to be held by a single hand of a user while the valve assembly is operated by the thumb comprises a housing 5, a supply piping 6 for purified water connected to a port 9 of the housing 5 directed towards the upper side, and an outlet 8 for purified water directed towards the lower side in a typical upright held orientation.
  • valve assembly 10 is arranged in a receptacle 2 of a housing
  • valve assembly 10 can control the volume or rate of the flow of purified water from the supply piping 6 to the outlet 8.
  • the receptacle 2 is in communication with the port 9 of the housing 5 and the outlet 8.
  • the first disc 11 of the valve assembly 10 is rotationally fixed in position within the receptacle 2 (for example by protrusions engaging with the positioning notches 17a, 17b at the outer periphery of the first disc 11 (see Fig. 1) or by the mating shape of the receptacle such that the at least one window 13a, 13b communicates with the outlet 8.
  • the outer periphery of the surface of the first disc surrounding the lower opening of the window(s) is sealed against the housing 5 by means of an annular seal 7a such that all liquid entering the outlet 8 from the receptacle 2 must pass through the window(s) 13a, 13b of the fist disc 11.
  • the second disc 12 is shown to be mounted in the receptacle 2 so as to freely float in contact with the first disc 11 and such that the first and second sealing contact surfaces 11a, 12a are pressed against each other by only the water pressure from the supply piping
  • the second disc 12 of the valve assembly 10 is engaged with a manually operable rotary actuator 3,4 for rotatingly driving the second disc 12 relative to the first disc 11 between the fully closed rotational position and the fully open rotational position within the above described rotational range.
  • the rotary actuator comprises an axle 4 and a driver 3 connected with a lower end of the axle 4.
  • driver 3 and axle 4 may be made (i.e. essentially consists) of the same material, it is preferred that driver 3 and axle 4 are made of different materials.
  • driver 3 is made of (i.e. essentially consists) of a material that has a low content of leachables, i.e. has a low tendency to release contaminants.
  • Non-limiting examples of materials suitable for driver 3 may be selected from the group consisting of polyacetal, and polypropylene.
  • a preferred example of a material suitable for driver 3 is polyoxymethylene (POM).
  • axle 4 is made of a material having good mechanical strength, especially on torsion resistance, so as to allow for accurate and precise operation of the ceramic discs, which is particularly necessary to find the dropwise dispensing position.
  • Non-limiting examples of such materials suitable for axle 4 may be selected from the group consisting of polyamides (PA), reinforced (e.g. with fiber reinforcement or talc) polyamides, and reinforced (e.g. with talc) polypropylene.
  • PA polyamides
  • talc fiber reinforcement or talc
  • PPA polyphthalamide
  • a part of the actuator extends to the outside of the housing 5 and is accessible for the thumb of the hand to be operated to rotationally drive the second disc 12 and can be shaped according to the desired ergonomics.
  • the rotary actuator is sealed against the housing 5 by an O-ring or gasket 7b to prevent liquid from escaping the receptacle 2 other than through the outlet 8.
  • the specific design of the actuator is not critical provided the floating positioning and contact of the second disc against the first disc is achieved without introducing additional axial forces in connection with the operation for rotation of the second disc from the fully closed to the fully open rotational position (see also Fig. 5).
  • the second disc 12 is provided with additional protrusions 14c, 14d on an outer periphery that are inserted into corresponding peripheral grooves 2a, 2b of the receptacle 2 so as to guide and limit the rotational range of the rotation of the second disc 12.
  • the shapes and features of the two discs are also optimized for a simple and robust assembly process, with very limited possibilities to misassemble the parts in the housings of the liquid dispensing unit.
  • the positioning notches 17a, 17b on the first disc 11 used to maintain the first disc in place are not symmetrical, so as to only fit in one position into the receptacle 2 in which it is integrated.
  • the asymmetrical ribs 2c, 2d in the receptacle 2 that are used to maintain the first or lower disc 11 in a fixed position also prevent the upper disc to be mounted in the wrong angular position (see Fig. 5).
  • the two protrusions 3a, 3b (see Fig. 4) for engaging with the recesses 18a, 18b in the second or mobile disc 12 used to drive valve operation with the rotating actuator 3,4 are also different from each other, to allow only one angular position relative to an axis of the actuator. This is important as the stops on the valve (fully open and fully closed) are defined between the axle and the housing 5.
  • Ribs 2e,2f between the peripheral grooves 2a, 2b of the receptacle 2 are used for defining these stops and thus also influence the outer shape of the second or mobile disc 12 that should be free to rotate on its operating range despite these ribs 2e,2f.
  • the present valve assembly and liquid dispensing unit may be used in applications having different user requirements.
  • a user may want to use the present valve assembly and liquid dispensing unit for "volumetric dispensing", i.e. dispensing a predefined volume of purified water from the liquid dispensing unit.
  • it may be advantageous to pre-set the valve assembly as defined herein to a defined flow rate, opening and closing the flow of purified water through the supply piping for purified water through the valve assembly as defined herein to the outlet for purified water using a solenoid valve.
  • a solenoid valve may be actuated using any suitable actuator, such as a foot pedal, which gives the user freedom of using their hands.
  • the solenoid valve may be actuated by a simple switch or also by remote control.
  • the present liquid dispensing unit 1 optionally comprises a solenoid valve controlling the flow of purified water through the supply piping 6 for purified water through valve assembly 10 as defined herein to outlet 8 for purified water.
  • a solenoid valve may be placed at any location that allows controlling the flow of purified waterthrough the supply piping 6 for purified water through valve assembly 10 as defined herein to outlet 8 for purified water.
  • a suitable location may, for example, be before or at the entry of the purified water into supply piping, or at any place along the supply piping 6; preferably, such solenoid valve is placed before or at the entry of the purified water into supply piping 6.
  • such solenoid valve may be placed at the point of dispensing, i.e. outlet 8.
  • the present valve assembly may, of course, also be rotatingly actuated using a motor, preferably a servomotor or a stepper motor.
  • a motor preferably a servomotor or a stepper motor.
  • such motor may further comprise mechanical gears for reducing the actuating speed.
  • Such motor is arranged in such a way that it either directly or indirectly (e.g. through an axle) rotate the second disc 12.
  • said motor may be placed such that it rotatingly drives axle 4.
  • the present liquid dispensing unit may be used as part of a water purification system, particularly a water purification system for providing pure or ultrapure water in a laboratory environment.
  • the present application also provides for a water purification system comprising such liquid dispensing unit as defined herein.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)
  • Multiple-Way Valves (AREA)

Abstract

La présente invention concerne un ensemble valve (10) pour une unité de distribution de liquide et une unité de distribution de liquide pour un système de purification d'eau ainsi qu'un système de purification d'eau en tant que tel.
PCT/EP2023/084409 2022-12-09 2023-12-06 Ensemble valve pour unité de distribution de liquide et unité de distribution de liquide pour système de purification d'eau Ceased WO2024121181A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP23818052.5A EP4630713A1 (fr) 2022-12-09 2023-12-06 Ensemble valve pour unité de distribution de liquide et unité de distribution de liquide pour système de purification d'eau
CN202380093653.6A CN120659941A (zh) 2022-12-09 2023-12-06 用于液体分配单元的阀组件及用于水净化系统的液体分配单元
JP2025533379A JP2025538793A (ja) 2022-12-09 2023-12-06 液体分注ユニットのためのバルブアセンブリおよび水浄化システムのための液体分注ユニット

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22290069 2022-12-09
EP22290069.8 2022-12-09

Publications (1)

Publication Number Publication Date
WO2024121181A1 true WO2024121181A1 (fr) 2024-06-13

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PCT/EP2023/084409 Ceased WO2024121181A1 (fr) 2022-12-09 2023-12-06 Ensemble valve pour unité de distribution de liquide et unité de distribution de liquide pour système de purification d'eau

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EP (1) EP4630713A1 (fr)
JP (1) JP2025538793A (fr)
CN (1) CN120659941A (fr)
WO (1) WO2024121181A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0329800A1 (fr) * 1988-02-23 1989-08-30 Flühs Drehtechnik GmbH Partie supérieure de vanne
US5925240A (en) 1997-05-20 1999-07-20 United States Filter Corporation Water treatment system having dosing control
US20040182457A1 (en) * 2003-03-20 2004-09-23 Freddy Vidal Fluid spigot and filter unit
WO2010043899A1 (fr) 2008-10-16 2010-04-22 Otv Sa Appareil et procédé de purification d'eau
US20150233483A1 (en) * 2012-11-07 2015-08-20 Mack & Schneider Gmbh Disc Valve
US11035484B2 (en) 2017-02-24 2021-06-15 Merck Patent Gmbh Water purification and dispensing system and method
WO2022070839A1 (fr) * 2020-10-02 2022-04-07 株式会社デンソー Système de soupape

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0329800A1 (fr) * 1988-02-23 1989-08-30 Flühs Drehtechnik GmbH Partie supérieure de vanne
US5925240A (en) 1997-05-20 1999-07-20 United States Filter Corporation Water treatment system having dosing control
US20040182457A1 (en) * 2003-03-20 2004-09-23 Freddy Vidal Fluid spigot and filter unit
WO2010043899A1 (fr) 2008-10-16 2010-04-22 Otv Sa Appareil et procédé de purification d'eau
US20150233483A1 (en) * 2012-11-07 2015-08-20 Mack & Schneider Gmbh Disc Valve
US11035484B2 (en) 2017-02-24 2021-06-15 Merck Patent Gmbh Water purification and dispensing system and method
WO2022070839A1 (fr) * 2020-10-02 2022-04-07 株式会社デンソー Système de soupape

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JP2025538793A (ja) 2025-11-28
EP4630713A1 (fr) 2025-10-15

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