EP0999995A1 - Contenant traverse par un fluide et pouvant etre rempli de granules - Google Patents

Contenant traverse par un fluide et pouvant etre rempli de granules

Info

Publication number
EP0999995A1
EP0999995A1 EP99930987A EP99930987A EP0999995A1 EP 0999995 A1 EP0999995 A1 EP 0999995A1 EP 99930987 A EP99930987 A EP 99930987A EP 99930987 A EP99930987 A EP 99930987A EP 0999995 A1 EP0999995 A1 EP 0999995A1
Authority
EP
European Patent Office
Prior art keywords
plastic
flow
hydrophilic
hydrophobic
flow cup
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Withdrawn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
EP99930987A
Other languages
German (de)
English (en)
Inventor
Detlev Weyrauch
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.)
Brita SE
Original Assignee
Brita SE
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 Brita SE filed Critical Brita SE
Publication of EP0999995A1 publication Critical patent/EP0999995A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/06—Mounted on or being part of a faucet, shower handle or showerhead

Definitions

  • the invention relates to a flow cup which can be filled with a granulate and can be flowed through by a liquid to be treated, and has side walls and sieves attached to the ends thereof, with the aid of which the granulate can be flowed through inside the flow cup and kept essentially captive.
  • filter devices For filtering, cleaning or otherwise treating liquids, filter devices are known which, as flow cups, have a specific shape of a cartridge which is filled with granular ion exchanger and / or activated carbon.
  • the water to be filtered is filled in through a sieve cover and leaves the filter cup through its sieve at the bottom.
  • the known filter device is inserted into a funnel of a water purification device provided for this purpose, which is placed on a collecting or collecting container for filtered liquid and is preferably closed at the top with a removable cover. In this way, tap water for tea preparation or the like can be improved.
  • the known filter cups have slotted plastic fields in the lid and / or bottom as sieves. These slots retain the granular filter material in the filter cup.
  • filter particles In order to offer the largest possible surface area of filter material to the flowing liquid or to force the liquid to undergo the most intensive and extensive adsorption activity, filter particles of small size are used. Particles of around 200 ⁇ m and smaller occur in the filter material. The active surface offered to the continuous liquid to be filtered is therefore pleasantly large.
  • this advantage is associated with the disadvantage that some of these smallest granulate particles pass through the inlet openings in the lid and the outlet openings in the bottom. These particles floating in the cleaned liquid are not desired by the user, but are disturbing.
  • Injection molding should not be less than the size of a retaining slot in the lid and / or bottom, ie in the sieve in question.
  • Activated carbon particles in particular can have a platelet shape, the minimum dimension of which can reach 250 ⁇ m or less, so that precisely these particles, which are visually visible to the end user, can pass through the inlet and outlet slots.
  • the slot width of approximately 200 ⁇ m is the lower limit and cannot be undercut.
  • the simplest possible shape of a sieve can contribute to simplifying production, assembly and also use, the flow capacity being able to be improved even with a very small pore size which is still smaller than the known sieves.
  • Hybrid composite materials are already known, but they are used to improve the mechanical properties of the composite materials, for example for the design of surfaces in shipbuilding, surfboards or Formula 1 racing cars.
  • the invention has for its object to provide a flow cup of the type mentioned, in which as little resistance as possible to improve the inflowing liquid and at the same time outflowing gases is opposed. Similar conditions may also be desired on the downstream side.
  • At least one sieve has a textile fabric in which plastic fibers of at least two different types are connected to form a hybrid, one type of plastic fiber containing hydrophilic components and the other type of plastic fiber containing hydryphobic components. It is particularly important to provide the textile fabric for the sieve on the inflow side, and the desired effect is achieved by the measure according to the invention when at least part of the sieve is equipped with a textile fabric according to the invention.
  • "Textile" in connection with the flat structure means threads or yarns made of different materials. In this sense, textile also includes plastic threads or plastic fibers. These textile fabrics can be, for example, a nonwoven fabric, knitted fabric or also fabric.
  • plastic fibers are understood to mean fibers, yarns or threads which have plastic. It can be made entirely or partly of plastic fibers. What is important is their outward-looking property, which is hydrophilic or hydrophobic.
  • a hybrid is formed by connecting the plastic fibers according to the invention to one another.
  • Hybrids are already known in connection with composite materials. There, hybrids are created by embedding two or more fibers in a matrix. In the known composite materials, such as those used in shipbuilding, hybrids are understood as alloys in metallurgy. The main goal is to optimize the material (the hybrid or the alloy) so that the material meets the specific requirements in terms of performance and costs - 4 -
  • a hybrid is a textile fabric in which both the hydrophilic property and the hydrophobic property emerge simultaneously and / or next to one another.
  • the textile fabric of the sieve is a hybrid fabric composed of hydrophilic and hydrophobic fibers. It is true that nonwovens can be used as textile fabrics, in which the cohesion does not come about by interweaving warp and weft, but rather by the plastic fibers' own adhesion or by the same preparation obtained. It is true that textile fabrics made by knitting and knitting can also be used in the sense of the invention. However, a fabric is particularly cheap. Such textile fabrics are expediently produced by crossing the warp and weft threads at right angles according to the rules of weaving. As is well known, there are many different types of weave that can be used to produce a hybrid fabric for the sieve.
  • the hybrid fabric has pure hydrophilic and pure hydrophobic areas.
  • the liquid to be cleaned or filtered then not only flows through the sieve areas with textile fabrics past a few hydrophobic or hydrophilic synthetic threads or fibers, but larger hydrophilic or hydrophobic areas are provided as desired.
  • Such areas can be of the order of magnitude of 1 mm to 1 mm and up to 40 mm to 40 mm.
  • the plastic of the hydrophilic fiber expediently contains polyester (PES) or polyamide (PA) and the plastic of the hydrophobic fiber contains polypropylene (PP) or polyethylene (PE). It is particularly preferred if the respective fiber consists of the plastic mentioned.
  • PES polyester
  • PA polyamide
  • PE polypropylene
  • PE polyethylene
  • the hydrophilic fiber consists of a hydrophilized plastic and the hydrophobic fiber consists of a hydrophobized plastic.
  • hydrophilic part of the molecule shows a pronounced interaction with polar solvents, especially with water.
  • Typical hydrophilic groups are carboxylate, sulfate and sulfonate and optionally substituted ammonium functions or polyester chains.
  • Hydrophilizing is a textile chemical measure to increase the water affinity or the absorbency and the moisture transport capacity of synthetic fibers. The hydrophilization is carried out with the aid of hydrophilizing agents which are known per se, for example ethoxylation products.
  • Typical hydrophobic groups are, for example, long-chain or aromatic hydrocarbon radicals, which can also be perfluorinated.
  • Hydrophobing agents used for waterproofing cover for example, textiles or leather with a thin layer of hydrophobic groups, such as longer alkyl chains. Water droplets roll off hydrophobized materials without wetting them.
  • the textile fabric of the sieve is connected to support ribs by injection molding, welding, gluing or the like.
  • the textile fabric of the sieve with the properties intended according to the invention can be fixedly or releasably attached to the bottom or lid area of a flow cup and mechanically well supported by intermediate ribs. Arched configurations of a sieve are also possible.
  • the size of the pores of the textile fabric is 10 ⁇ m to 200 ⁇ m and preferably 20 ⁇ m to 100 ⁇ m. If a sieve is equipped with such a textile fabric on a flow-through cup, the particle leakage of fine-grained granules can be prevented without problems.
  • the textile fabric in the lid of the flow cup for example a filter cartridge, offers as little resistance as possible to the inflowing water, but also has sufficient gas permeability for the necessary venting of outflowing gases. This is achieved by using the hydrophilic and, in addition, the hydrophobic areas, which are arranged unevenly or evenly distributed over the surface of the screen.
  • threads made of polyester or polyamide can be used as hydrophilic fibers or threads - 6 -
  • Textile fabrics made from these fibers have a very good flow through for liquids, especially for water.
  • Polypropylene or polyethylene can be used as the hydrophobic threads or fibers.
  • hydrophobic threads or fibers In areas with pure hydrophobic threads or fibers, in particular with hydrophobic fabrics, lamellae of liquid or water cannot form due to the low surface tension. For example, the water on the surface of such a sheet contracts to form spherical drops of water. It does no harm if the flowability for liquid, in particular water, is more or less prevented because the flow then takes place through the neighboring hydrophilic areas.
  • the plastic fibers or plastic threads consist of a uniform material, that is to say in one case of hydrophilic plastic alone and in the other case of hydrophobic plastic alone.
  • the thread itself therefore does not contain plastic mixtures.
  • the fabric as a textile fabric, it is possible in this way to produce pure hydrophilic areas and also pure hydrophobic areas.
  • weaving technology cannot avoid a mixed zone between pure hydrophilic zones and pure hydrophobic zones arranged next to it.
  • FIG. 1 shows a cross-sectional view through a flow cup of a special embodiment according to the invention
  • Figure 2 is a plan view of the curved sieve at the upper end of the inflow
  • FIG. 3 shows a cross-sectional view through the cover with the strainer on the inflow side attached thereto
  • Figure 4 is a schematic representation of a hybrid fabric in the form of a canvas fabric
  • FIG. 5 shows a textile fabric with a checkerboard arrangement of hydrophilic, hydrophobic and mixed areas. - 7 -
  • the flow cup shown overall in cross section in FIG. 1 consists as a lower part of a cup 2 filled with granular filter material 1, the bottom 3 of which has outlet openings 4 with sieving devices (not shown) and is pulled up obliquely inwards at one point to form a ventilation notch 5.
  • the side walls of the flow cup 2 end at the top in a sealing flange 6, which includes an imaginary, horizontal plane; the entire device also consists of a cover, generally designated 7, whose outer, lower flange 8 terminates with the same imaginary horizontal plane and is inserted in the sealing flange in such a way that a liquid-tight connection, for example welding, is easily possible.
  • the filter device has, as a third part, a sieve 9 on the inflow side, which has a retaining ring 10, which also includes the imaginary horizontal plane.
  • the retaining ring 10 of the sieve 9 fits the lid 7 and the flow cup 2 in such a way that the three parts can be connected to one another in a liquid-tight manner in the region of the common connection plane, for example welded.
  • stacking ribs 1 which extend approximately over half the height of the flow cup 2 from the bottom 3 upwards and are evenly distributed on the inside of the side walls, for example three of them.
  • the finished flow cup 2 are placed on these stacking ribs 1 1 after plugging into one another for storage.
  • the empty flow cups 2 can therefore be stored in a stack in a stack.
  • the lid 7 consists of a lower outer part 1 2 next to the outer flange 8, in the surface of which there are inlet openings 13 for the liquid to be filtered.
  • the respective vertical section through the cover 7 according to FIGS. 1 and 3 is such that it runs straight through an inlet opening 13 on the right side.
  • This outer part 12 of the lid 7 narrows upwards and ends in a gripping part 14 with a gripping trough 15 and with ventilation slots and some ventilation holes 17 arranged above it, through which air rising from below can escape to the outside of the filter device during operation.
  • 7 can be seen on the inner surface of the cover 7 holding ribs 18, through which a bearing surface for the screen 9 is created in the cover 7.
  • the screen 9 which is mainly visible in the middle in the plan view of FIG. 3 from below in the direction of arrow A, consists of a spherical cap-shaped textile fabric 1 9, which - 8th -
  • FIGS. 1 and 3 which also represent the operating form, upward, four position knobs 22 are attached to the retaining ring 10, which protrude evenly around the circumference and project upwards so that they hit the bearing surface of the four retaining ribs 1 8 in the cover 7 when the retaining ring 10 is in the correct position. This is shown in the figures.
  • the lid 7 and the sieve 9 can be brought into the position shown in Figure 3, in which the positioning knobs 22 are brought into contact with the retaining ribs 18 and the retaining ring 10 is located on the peripheral flange 8 of the lid 7 .
  • the screen 9 is welded to the cover 7 in a liquid-tight manner.
  • the flow cup 2 is filled with filter material 1, after which the cover 7 is brought into the position shown in FIG. 1 and the flange 8 is welded to the sealing flange 6 in a liquid-tight manner.
  • the filter device of FIG. 1 produced in this way can then be inserted into a filter device (not shown) and used by the end user.
  • the liquid poured in above, preferably water to be filtered enters through the liquid inlet openings 13 of the cover 7, also referred to as sieve slots, flows through the sieve 9, the filter material 1 and leaves the flow cup 2 through the outlet opening 4, which passes through a filter on the bottom through the filter material 1 also holds back.
  • the pores 29 can also be seen, the size of which in the example shown is 30 ⁇ m to 30 ⁇ m.
  • hybrid fabrics 23 with support ribs 20, 21 shown in FIGS. 4 and 5 can be produced as a one-piece screen 9 corresponding to the hatched area in FIG. 2.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un contenant pouvant être traversé par un fluide à traiter et pouvant être rempli de granulés. Ce contenant présente des parois latérales ainsi que des tamis qui sont placés aux extrémités de ces dernières et permettent de maintenir les granulés à l'intérieur du contenant de façon pratiquement imperdable et de manière à ce qu'ils puissent être traversés par le fluide. L'invention vise à améliorer un tel contenant de manière à ce qu'une résistance la plus faible possible soit opposée au fluide qui arrive et simultanément aux gaz qui sortent. A cet effet, au moins un tamis présente une structure plane textile (23) dans laquelle des fibres de matière plastique (24, 25) d'au moins deux types différents sont reliées entre elles de manière à former un matériau hybride. L'une des fibres de matière plastique (24) contient des éléments hydrophiles et l'autre (25) des éléments hydrophobes.
EP99930987A 1998-03-28 1999-03-24 Contenant traverse par un fluide et pouvant etre rempli de granules Withdrawn EP0999995A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19814008 1998-03-28
DE19814008A DE19814008A1 (de) 1998-03-28 1998-03-28 Mit Granulat füllbarer Durchflußbecher
PCT/DE1999/000950 WO1999051527A1 (fr) 1998-03-28 1999-03-24 Contenant traverse par un fluide et pouvant etre rempli de granules

Publications (1)

Publication Number Publication Date
EP0999995A1 true EP0999995A1 (fr) 2000-05-17

Family

ID=7862847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99930987A Withdrawn EP0999995A1 (fr) 1998-03-28 1999-03-24 Contenant traverse par un fluide et pouvant etre rempli de granules

Country Status (5)

Country Link
US (1) US6012232A (fr)
EP (1) EP0999995A1 (fr)
AU (1) AU4767599A (fr)
DE (1) DE19814008A1 (fr)
WO (1) WO1999051527A1 (fr)

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US20050217132A1 (en) * 2004-03-10 2005-10-06 Ashford Robert C Moisture absorber
RU2262976C1 (ru) * 2004-03-22 2005-10-27 Общество с ограниченной ответственностью ООО "Аквафор" (ООО "Аквафор") Устройство фильтрационное
DE102004016601A1 (de) * 2004-04-03 2005-10-13 Bayer Chemicals Ag Stabile Adsorber-Granulate
US20060021928A1 (en) * 2004-04-12 2006-02-02 David Nelson Efficient Water Filters
US20070209984A1 (en) * 2006-03-09 2007-09-13 Fka Distributing Co. D/B/A Homedics, Inc. Water Purifier
DE102007033339B4 (de) * 2007-07-16 2017-02-02 Bwt Water+More Gmbh Filterkartusche für eine drucklose Wasserfiltervorrichtung
WO2009018357A2 (fr) * 2007-07-31 2009-02-05 Homax Products Inc. Déshumidificateur
US20090057241A1 (en) * 2007-08-29 2009-03-05 Phillip Nauta Filter assembly
US8043502B2 (en) * 2007-08-29 2011-10-25 Uv Corporation Water pitcher filter
DE102008015112B9 (de) * 2008-03-20 2010-08-12 Brita Gmbh Behälter für die Filtration von Flüssigkeit
RU2383382C2 (ru) 2008-05-29 2010-03-10 Общество с ограниченной ответственностью ООО "Аквафор" (ООО "Аквафор") Фильтрующий патрон
US8128820B2 (en) * 2009-02-25 2012-03-06 Mr. Chiaphua Industries Limited UV liquid storage and dispensing device
US20120132398A1 (en) * 2009-09-13 2012-05-31 Jeter Sheldon M Systems and methods of thermal energy storage and release
US8281954B2 (en) * 2009-11-13 2012-10-09 E. & J. Gallo Winery Sensory aroma glass
WO2013009752A2 (fr) * 2011-07-11 2013-01-17 Illinois Tool Works Inc. Barrière dotée de revêtement hyperhydrophobe
US9132369B2 (en) 2012-01-20 2015-09-15 Brita Lp Water filter housing sieve
USD820385S1 (en) 2016-12-14 2018-06-12 Brita Lp Water filter housing
US11872506B2 (en) * 2018-07-07 2024-01-16 Paragon Water Systems, Inc. Water filter cartridge having an air vent

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JPS61249341A (ja) * 1985-04-27 1986-11-06 Showa Denko Kk 脱水用具
DE8916267U1 (de) * 1989-02-20 1996-08-08 Klöckner-Humboldt-Deutz AG, 51063 Köln Sichter zum Sichten von körnigem Gut und Mahlanlage mit Einschaltung eines solchen Sichters
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Also Published As

Publication number Publication date
AU4767599A (en) 1999-10-25
DE19814008A1 (de) 1999-09-30
WO1999051527A1 (fr) 1999-10-14
US6012232A (en) 2000-01-11

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