WO2014192011A2 - Dispositif de fermeture automatique pour un filtre à eau - Google Patents

Dispositif de fermeture automatique pour un filtre à eau Download PDF

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Publication number
WO2014192011A2
WO2014192011A2 PCT/IN2014/000222 IN2014000222W WO2014192011A2 WO 2014192011 A2 WO2014192011 A2 WO 2014192011A2 IN 2014000222 W IN2014000222 W IN 2014000222W WO 2014192011 A2 WO2014192011 A2 WO 2014192011A2
Authority
WO
WIPO (PCT)
Prior art keywords
water
casing
base
outlet
water soluble
Prior art date
Application number
PCT/IN2014/000222
Other languages
English (en)
Other versions
WO2014192011A3 (fr
Inventor
Ujas P. DAVE
Jignesh Shah
Ramesh Singh
Umesh TIWARI
Paul PARMAR
Original Assignee
Tata Chemicals Limited
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 Tata Chemicals Limited filed Critical Tata Chemicals Limited
Publication of WO2014192011A2 publication Critical patent/WO2014192011A2/fr
Publication of WO2014192011A3 publication Critical patent/WO2014192011A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/005—Valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate

Definitions

  • the document generally relates to an auto shut off system for a water treatment device.
  • the document provides an auto shut off system for stopping the flow of water through the device once a predetermined quantity of water has passed through it.
  • the document also provides a water treatment device having such an auto shut off system.
  • Clean potable water is a basic human requirement. However, a large portion of the world's population, especially those living in developing counres do not have access to i. clean potable water.
  • a number of water treatment devices are well known in the art. Such devices are employed directly in a water system, either in-line or at a terminal end, or in self-contained batch systems.
  • An example of an in-line system is an under-the-counter device which filters water prior to reaching the faucet.
  • Terminal end devices include counter top and faucet mounted filtration systems.
  • Self-contained batch systems include devices such as carafe units.
  • Typical water treatment devices employ mechanical filtration or chemical treatment.
  • Mechanical filters treat water by preventing passage of particulates and / or bio-organisms.
  • Chemical treatment e.g., activated carbon-based and ion exchange media
  • processes such as adsorption and ion exchange for removing undesirable chemical species and inactivation of microorganisms.
  • a major drawback associated with chemical treatment is that the chemical media eventually becomes inactive, providing no indication that the useful life of the chemical element has been exhausted.
  • Various methods have been employed to indicate end of life to the user where it is not inherently provided by the behaviour of the filter media.
  • One such means of indicating end of useful life of treatment units is through devices that use a process commonly referred to as "flow totalization". These devices totalize the liquid volume which passes through the treatment media. Both electrical and mechanical "flow totalization" devices are known in the art.
  • Electrical flow totalization devices employ pressure transducers.
  • the transducers include integrated outputs to calculate total volume. After a predetermined volume has been reached, a valve is electrically actuated to stop the flow.
  • a mechanical flow totalization device may employ a turbine interconnected with a series of gears.
  • the gears are designed and adapted to mechanically "?dd up" the volume of water passed through the device.
  • float mechanism designed and adapted to rotate a pre-determined distance upon each fill cycle of the water treatment unit. Once that float has made a specific number of rotations and has travelled the complete distance across a support rod, the float rests in a position where it is visible through an opening in housing, indicative of the end of life of the water treatment unit.
  • a movable support having an external arm with a plug is stacked on the biocide tablet, such that as the water teachable biocide tablet is consumed, the movable support descends and at a predetermined end-of-life position the external arm plugs the water outlet, thereby shutting off the flow of water.
  • this device has a number of disadvantages.
  • the external arm and plug are delicate and prone to breakage.
  • the external arm and plug allows for external tampering of the device.
  • the auto shut off device disclosed therein comprises of one liquid inlet, one liquid outlet and a casing that defines an opening.
  • the device further comprises of a stopper shaped to close the opening and comprises of a top, bottom and side surfaces such that the top surface is positioned within the casing and the bottom surface is positioned outside the casing when the stopper is received in engagement in said opening.
  • the stopper further defines a liquid inlet aperture on the top surface and a liquid outlet aperture on the top surface.
  • the stopper further defines a connecting passage connecting the liquid inlet aperture to the liquid outlet aperture.
  • the stopper further comprises of a liquid inlet passage connecting the liquid inlet to the liquid inlet aperture, and a liquid outlet passage connecting the liquid outlet aperture to the liquid outlet.
  • the device further comprises of a water dissolvable tablet within the casing and configured to rest on the top surface of the stopper.
  • the device further comprises of a plunger resting on the water dissolvable tablet, the plunger including a plug configured to block the liquid inlet aperture and a spring member above the plunger and configured to urge the plunger downwards towards the stopper such that water exiting the liquid inlet aperture impinges on the water dissolvable tablet before entering the liquid outlet aperture.
  • water enters through the liquid inlet and rises up through the liquid inlet passage. Once water reaches the liquid inlet aperture of the liquid inlet passage, air in the casing gets trapped within the casing. As the water rises up further in casing, the trapped air in the casing starts getting compressed till the pressure of the compressed air becomes equal to the water pressure at the liquid inlet. This rise in pressure of the compressed air prevents water from rising further up in the casing. Water rises up the liquid inlet passage and impinges onto the bottom surface of the lowermost tablet. The water is diverted by the tablet towards the liquid outlet.
  • the auto-shut off system comprises of a casing defining a top edge and a bottom edge; the casing including an inlet configured to receive a water inflow proximate the top edge and an outlet for the water outflow proximate the bottom edge, the casing defining a hollow passage for the unidirectional flow of water under gravity from the inlet to the outlet; a base configured to be received and retained within the casing, the base including a bottom surface and one or more sidewalls extending upward therefrom to define a hollow cavity and forming a rim disposed in contact with the casing, the base further defining an opening at or proximate the bottom surface, the opening in fluid communication with the outlet; at least one water soluble tablet positioned within the hollow cavity and configured to extend above the rim; the water soluble tablet sized smaller than the hollow cavity to define a clearance passage between itself and the base; the clearance in fluid communication with the opening on the base; the water soluble tablet configured to dissolve after contact
  • a water treatment device comprises of a housing including a water filtration system installed therein, the housing defining a chamber therein; an auto-shut off system positioned inside the chamber, including a casing defining a top edge and a bottom edge; the casing including an inlet configured to receive a water inflow proximate the top edge and an outlet for the water outflow proximate the bottom edge, the casing defining a hollow passage for the unidirectional flow of water under gravity from the inlet to the outlet; a base configured to be received and retained within the casing, the base including a bottom surface and one or more sidewalls extending upward therefrom to define a hollow cavity and forming a rim disposed in contact with the casing, the base further defining an opening at or proximate the bottom surface, the opening in fluid communication with the outlet; at least one water soluble tablet positioned within the hollow cavity and configured to extend above the rim; the water soluble tablet sized smaller than the hollow cavity to define a clearance passage between
  • Figure 1 illustrates an auto shut off system of prior art
  • Figure 2 illustrates an auto shut off system in accordance with a preferred embodiment of the present invention
  • Figure 3 illustrates a base in accordance with a preferred embodiment of the present invention.
  • FIG. 2 illustrates an auto shut off system (10) fo'r indicating the total amount o water that has passed through a water treatment device ( 12) and stopping further flow of water once the predetermined amount of water has passed through the water treatment device (12).
  • the auto shut off system (10) comprises of a casing (14) and a base (16) including an opening (18).
  • a water soluble tablet (20) is placed in the casing (14) such that it rests on the base (16).
  • a plunger (22) rests on top of the water soluble tablet (20). Water enters the auto shut off system (10) from the top and flows downwards over the water soluble tablet (20) and enters the base (16).
  • the casing (14) defines a top edge (28) and a bottom edge (26); the casing including an inlet (34) configured to receive a water inflow proximate the top edge (28) and an outlet (24) for the water outflow proximate the bottom edge (26), the casing defining a hollow passage (38) for the unidirectional flow of water under gravity from the inlet (34) to the outlet (24); a base (16) configured to be received and retained within the casing (14), the base (16) including a bottom surface (40) and one or more sidew alls (42) extending upward therefrom to define a hollow cavity and forming a rim (30) disposed in contact with the casing (14), the base (16) further defining an opening (18) at or proximate the bottom surface (40), the opening (18) in fluid communication with the outlet (24).
  • the auto-shut off system further comprises of at least one water soluble tablet (20) positioned within the hollow cavity and configured to extend above the rim (30); the water soluble tablet (20) sized smaller than the hollow cavity to define a clearance passage (36) between itself and the base; the clearance (36) in fluid communication with the opening (18) on the base (16); the water soluble tablet (20) configured to dissolve after contact with a pre-determined quantity of water; and a plunger (22) supported over the water soluble tablet (20) and sized smaller than the casing to define a side channel (32) such that water from the inlet flows via the side-channel to pass through the opening (18) and out of the outlet (24); the plunger (22) further configured to descend downwards and engage the base (1 ) on dissolution of the water soluble tablet (20) and close the fluid communication between the inlet (34) and the outlet (24).
  • the sidewalls of the base extend in a taper manner between the bottom surface and the rim.
  • the auto-shut off system includes one or more water soluble tablets stacked on top of each other to vary the allowable predetermined quantity of water before the plunger engages the base.
  • the water soluble tablet (or tablets) is wrapped with parafilm or coated with epoxy resin to control the dissolution of the tablet.
  • the water soluble tablet(s) is wrapped with parafilm or coated with epoxy resin such that at least one surface of the tablet is exposed to water for dissolution.
  • the base (16) has an opening (18) for water to pass out of the base (16) and out of the auto shut off system (10).
  • the opening (18) may be positioned either on the bottom surface (40) or on the sidewalls (42) of the base (16).
  • the opening (18) is of two parts with the first part located on the sidewalls (42) and the second part located on the bottom surface (40). The first part and the second part are in fluid communication with each other.
  • the opening (18) of the base is located such that it extends partially on the sidewall (42) and partially on the bottom surface (40).
  • the opening (18) is positioned on the bottom surface (40) to aid the unidirectional flow.
  • the bottom surface of the base includes serrations extending upwards to hold and locate the water soluble tablet within the hollow cavity.
  • the number of water soluble tablets provided in the casing (14) depends on the desired end of life and the solubility of the tablet.
  • the water soluble tablet is made of a chemical having low solubility in water.
  • the water soluble tablet includes but ⁇ not limited to tablet composed of CaS04.2H20, CaO or MgO.
  • the water soluble tablet is made of CaS0 4 .2H 2 0 by adding and mixing water to CaS0 4 .2H 2 0 and compressing the mixture in a pressure die.
  • the amount of CaS0 4 .2H 2 0 per tablet may vary from lgm to lOOgm. Specifically the amount of CaS0 4 .2H 2 0 per tablet may be lOgm.
  • the proportion of water to CaS0 4 .2H 2 0 may vary from 0 to 50% and is preferably 20%.
  • the compression pressure may vary from 0 to 50 tons and is preferably 8 tons.
  • the plunger (22) is in the form of a disk or plate that is sized to fit within the casing (14) with a clearance to form a side-channel (32) that enables water from the top to flow down towards the base (16).
  • the plunger (22) is a cylindrical shaped component.
  • the plunger (22) is configured to be received by the base (16) and block the flow of water through the auto shut off system once the tablets dissolve by a predetermined amount by water.
  • the plunger is configured to engage the rim (30) of the base (16) to provide a simple and reliable auto-shut off.
  • surface of the plunger which is configured to engage the rim (30) as well as the rim (30) are provided with gaskets to accommodate any variation in size of the plunger or the rim upon engagement thereof.
  • gaskets facilitate complete blockage of the flow of water through the side channel (32) and provides reliable auto-shut off.
  • the gaskets are made up of plastic or rubber.
  • the gaskets are made up of silicon rubber.
  • the plunger may provide a visual indicator of the amount of water that has passed through the water treatment device.
  • the casing of the auto-shut off system may be completely transparent for visual inspection f the plunger or may have a transparent column along a selected portion.
  • the plunger may be a brightly colored component.
  • a separate indicator in the form of a bright coloring or tape may be provided on the periphery of the plunger.
  • the plunger or the indicator may be visually inspected to determine the level of the water soluble tablets remaining in the casing of the auto shut off system.
  • the casing may be provided with a transparent window for visual inspection of the plunger or the indicator when the plunger is at or close to the end-of-life position.
  • the casing may also be provided with marking that indicates the amount of water that has passed through the water treatment device.
  • the casing includes a scale such that a relative position of the plunger with respect to the scale indicates a measure of the quantity of water that has passed through the casing.
  • a biasing means is provided between the plunger and the top edge of the casing such that the plunger is biased to descend downward inside the casing.
  • the biasing means include spring and bellow.
  • a spring may be provided between the plunger (22) and the top edge (28) of the casing (14) as seen in figure 2. The spring provides an additional downward force to the plunger (22) ensuring that it descends tlirough the casing (14) as the water soluble tablets (20) are dissolved by water.
  • the dissolution of water soluble tablets relates to the amount of water passed through the water treatment device.
  • the plunger or any indicator attached to it incrementally moves down as the water soluble tablets dissolve indicating the cumulative amount of water passed.
  • the water soluble tablets are configured to dissolve. Once the water soluble tablets (20) dissolve by a predetermined amount by water, the spring forces the plunger (22) onto the base (16). This shuts off the flow of water through the water treatment device (12).
  • the auto shut off system (10) is vertically oriented and allows unidirectional flow of water from the top to bottom of the water treatment device.
  • the outlet (24) of the auto shut off system (10) is made sufficiently wi de to ensure smooth exit of water and avoid any air bubble or water film formation.
  • the disclosure also provides a water treatment device comprising a housing including a water filtration system installed therein, the housing defining a chamber therein and the auto-shut off system, as disclosed above, inside the chamber.
  • the water filtration system may include any conventionally available water filtration system, preferably a cartridge as disclosed in Indian patent application no. 2807/MUM/2009 which is incorporated herein by reference.
  • An auto-shut off system for a water treatment device comprising a casing defining a top edge and a bottom edge; the casing including an inlet configured to receive a water inflow proximate the top edge and an outlet for the water outflow proximate the bottom edge, the casing defining a hollow passage for the uni-directional flow of water under gravity from the inlet to the outlet; a base configured to be received and retained within the casing, the base including a bottom surface and one or more sidevvalls extending upward therefrom to define a hollow cavity and fonning a rim disposed in contact with the casing, the base further defining an opening at or proximate the bottom surface, the opening in fluid communication with the outlet; at least one water soluble tablet positioned within the hollow cavity and configured to extend above the rim; the water soluble tablet sized smaller than the hollow cavity to define a clearance passage between itself and the base;, the clearance in fluid communication with the opening on the base; fee water soluble tablet configured to dissolve after contact with a pre-
  • a water treatment device comprising a housing including a water filtration system installed therein, the housing defining a chamber therein; an auto-shut off system positioned inside the chamber, including a casing defining a top edge and a bottom edge; the casing including an inlet configured to receive a water inflow proximate the top edge and an outlet for the water outflow proximate the bottom edge, the casing defining a hollow passage for the uni-directional flow of water under gravity from the inlet to the outlet; a base configured to be received and retained within the casing, the base including a bottom surface and one or more sidewalls extending upward therefrom to define a hollow cavity and forming a rim disposed in contact with the casing, the base further defining an opening at or proximate the bottom surface, the opening in fluid communication with the outlet; at least one water soluble tablet positioned within the hollow cavity and configured to extend above the rim; the water soluble tablet sized smaller than the hollow cavity to define a clearance passage between itself and the base; the
  • the auto shut off system 10 disclosed indicates the amount of water that has passed through a water treatment device and stops further flow of water once the predetermined amount of water has passed through.
  • the auto shut off system 10 as disclosed is simple, closed, compact, accurate and reliable. It is inexpensive and easy to manufacture.
  • the specific configuration of the auto-shut off system and in particular the positioning of the opening on the base; the positioning of the water soluble tablet within the base; size of the water soluble tablet being smaller than the base; and the unidirectional flow from top to bottom under gravity provide a simple and reliable solution.
  • the smaller size of the bottom surface viz-a-viz the rim which may be achieved by the tapered sidewalls, also ensure that not only the water is directed towards the tablets but also enable a larger opening 18 to be formed on the base.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

L'invention porte sur un système de fermeture automatique pour un dispositif de traitement d'eau. Le système de fermeture automatique comprend un boîtier définissant un bord supérieur et un bord inférieur ; le boîtier comprenant une entrée conçue pour recevoir un flux d'entrée d'eau à proximité du bord supérieur, et une sortie pour le flux de sortie d'eau à proximité du bord inférieur, le boîtier définissant un passage creux pour le flux d'eau unidirectionnel qui s'écoule par gravité de l'entrée à la sortie ; une base conçue pour être reçue et retenue dans le boîtier, la base comprenant une surface inférieure et une ou plusieurs parois latérales s'étendant vers le haut de cette dernière pour définir une cavité creuse et formant un rebord disposé en contact avec le boîtier, la base définissant en outre une ouverture au niveau ou à proximité de la surface inférieure, l'ouverture étant en communication fluidique avec la sortie ; au moins un comprimé soluble dans l'eau placé dans la cavité creuse et conçu pour s'étendre au-dessus du rebord ; le comprimé soluble dans l'eau étant de plus petite dimension que la cavité creuse, pour définir un passage libre entre lui et la base ; l'espace libre étant en communication fluidique avec l'ouverture de la base ; le comprimé soluble dans l'eau étant conçu pour se dissoudre après être entré en contact avec une quantité d'eau prédéterminée ; et un piston porté au-dessus du comprimé soluble dans l'eau et de plus petite dimension que le boîtier pour définir un canal latéral, de telle sorte que l'eau provenant de l'entrée s'écoule par le canal latéral pour passer à travers l'ouverture et la sortie ; le piston étant conçu en outre pour descendre et entrer en prise avec la base, lorsque le comprimé soluble dans l'eau se dissout, et pour fermer la communication fluidique entre l'entrée et la sortie. L'invention porte aussi sur un dispositif de traitement d'eau équipé d'un tel système de fermeture automatique.
PCT/IN2014/000222 2013-04-12 2014-04-08 Dispositif de fermeture automatique pour un filtre à eau WO2014192011A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1368/MUM/2013 2013-04-12
IN1368MU2013 IN2013MU01368A (fr) 2013-04-12 2014-04-08

Publications (2)

Publication Number Publication Date
WO2014192011A2 true WO2014192011A2 (fr) 2014-12-04
WO2014192011A3 WO2014192011A3 (fr) 2015-04-09

Family

ID=51989483

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2014/000222 WO2014192011A2 (fr) 2013-04-12 2014-04-08 Dispositif de fermeture automatique pour un filtre à eau

Country Status (2)

Country Link
IN (1) IN2013MU01368A (fr)
WO (1) WO2014192011A2 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1964302A (en) * 1929-05-31 1934-06-26 Shetler Melvin Water softening apparatus
US2292801A (en) * 1939-07-08 1942-08-11 Res Prod Corp Water softening apparatus
US2347204A (en) * 1942-05-29 1944-04-25 Lynn G Lindsay Multiple port valve
US2625166A (en) * 1946-01-23 1953-01-13 Lindsay Company Valve mechanism
US5882507A (en) * 1996-04-30 1999-03-16 Recovery Engineering, Inc. Water filter cartridge end-of-life mechanism
US5997734A (en) * 1998-01-16 1999-12-07 American Standard, Inc. Flow totalization, reset, and restriction mechanism for use in indicating the end of a treatment cartridge useful life

Also Published As

Publication number Publication date
WO2014192011A3 (fr) 2015-04-09
IN2013MU01368A (fr) 2015-04-10

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