EP0804114A1 - Bouilloire - Google Patents

Bouilloire

Info

Publication number
EP0804114A1
EP0804114A1 EP96900372A EP96900372A EP0804114A1 EP 0804114 A1 EP0804114 A1 EP 0804114A1 EP 96900372 A EP96900372 A EP 96900372A EP 96900372 A EP96900372 A EP 96900372A EP 0804114 A1 EP0804114 A1 EP 0804114A1
Authority
EP
European Patent Office
Prior art keywords
kettle
water
filter means
hopper
filter
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Withdrawn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
EP96900372A
Other languages
German (de)
English (en)
Inventor
Darren Mark Prosser
Russell Field
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.)
Kenwood Marks Ltd
Original Assignee
Kenwood Marks Ltd
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
Priority claimed from GBGB9501034.4A external-priority patent/GB9501034D0/en
Application filed by Kenwood Marks Ltd filed Critical Kenwood Marks Ltd
Publication of EP0804114A1 publication Critical patent/EP0804114A1/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Withdrawn legal-status Critical Current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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21166—Constructional details or accessories
    • A47J27/21183—Water filters
    • 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
    • C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug

Definitions

  • This invention relates to a kettle and in particu ⁇ lar though not exclusively to an electric kettle of the type commonly known as a jug kettle having a plastics moulded body.
  • the present invention consists in a kettle comprising a body for containing water to be heated, the body having a top opening closable by a lid, and filter means mounted in said body, said filter means being ar ⁇ ranged such that the water is constrained to pass there ⁇ through during its passage into the kettle body via said top opening.
  • the kettle body com ⁇ prises an upper compartment and a lower compartment, and said filter means is mounted between said compartments such that water poured into the upper compartment via said top opening is constrained to pass through the filter means into said lower compartment.
  • the kettle may be provided with an electric heating element located in or adjacent the lower compartment to heat water contained in said lower compartment.
  • the upper compartment is formed by a hopper mounted in the upper region of the interior of the kettle body and the filter means is mounted in the base of the hopper.
  • the hopper may be removable from the kettle body and/or the filter means may be removable from the hopper. This facilitates cleaning of the hopper and enables regular cleaning or replacement of the filter means, as well as the option of using the kettle without the filter means if desired.
  • the hopper is advantageously shaped to enable water in the lower compartment to be poured out of the kettle through the kettle spout.
  • the kettle may also include control means responsive to steam generated by the heated water to disconnect power to the heating element, and the hopper may be shaped to guide steam from the lower compart ⁇ ment towards the 'control means.
  • the filter means may be a demineralising filter comprising a filter cartridge containing a water treatment agent in a granular form which can act on the water flowing through the cartridge.
  • the filter cartridge preferably has spaced-apart water-permeable walls formed, for example, from sintered granular plastics material, between which the water treatment agent is retained.
  • One problem which may arise if a filter cartridge containing standard granular filter material including ion-exchange resins is used is used is that the granular material can become overheated due to the heated water and steam in the kettle, which may adversely affect the resins.
  • a particularly advantageous arrangement of the present invention includes means for thermally insulating the filter means from heated water in the kettle body.
  • the thermally insulating means may comprise a space formed in the kettle body which sur ⁇ rounds the filter means when mounted in the body and which is arranged to remain filled with relatively cool water during operation of the kettle. Additionally or alterna ⁇ tively, the thermally insulating means may comprise at least one insulating layer of air and/or of thermally insulating material, such as closed cell expanded foam, which surrounds the filter means when mounted in the kettle body.
  • the insulating means may also include a heat-reflec ⁇ tive coating surrounding the filter means.
  • the kettle also includes means for controlling the heating of the water in dependence on the rate of flow of the water through the filter means.
  • means for controlling the heating comprises a magnetic float provided in the kettle body, the float being arranged to activate a switch to connect power to the heating element only when the amount of water which has passed through the filter means reaches a predetermined level within the kettle body.
  • the kettle includes means for automatically registering each time water enters the kettle body, in order to monitor the usage of the filter means.
  • the lid may include an aperture through which the water can pass to enter the kettle without removing the lid, the aperture being closable by a cover, and the registering means being arranged to register automatically each time the cover is opened.
  • Figure 1 is a schematic vertical section through a kettle according to one embodiment of the invention.
  • FIG. 2 is a schematic vertical section through a kettle according to a second embodiment of the invention.
  • Figure 3 is a schematic half section - half side view of a filter cartridge which can be used in the kettle shown in Figure 1 or 2;
  • Figure 4 is a schematic perspective view of a lid which may be used on the kettle shown in Figure 1 or 2;
  • FIG 5 is an exploded view of the lid shown in Figure 4.
  • Figures 6 and 7 are respectively a plan and a perspective view of certain components of the lid shown in Figures 4 and 5;
  • FIG 8 is a schematic vertical section through a kettle according to a third embodiment of the invention.
  • a jug-type kettle comprises a body 1 of moulded plas- tics material having a top opening closable by a lid 17, a spout 2, and a handle 3.
  • a hopper 4 is mounted in the upper region of the body 1, the hopper accommodating a filter cartridge 5 which is removably mounted in a cylin ⁇ drical well 43 formed in the base of the hopper 4 and extending down into the lower region 7 of the body 1.
  • the cartridge 5 contains a granular filter material and will be described in more detail hereinbelow.
  • the well 43 has an annular seal 43a extending into the well and an aperture 45 is formed in its side wall near the top of the well.
  • a support 43b ensures that a space remains between the car ⁇ tridge 5 and the base of the well 43.
  • a conventional elec ⁇ tric heating element 6 is mounted in the lower region 7 of the kettle body.
  • the hopper 4 and kettle body 1 are shaped such that the lower region 7 communicates with the spout 2 and also with a steam-responsive control 8 mounted in the handle 3.
  • the control 8 is connected to a user-operable switch 9 for switching power to the heating element in a conventional manner. In this way, steam generated by water heated in the lower region 7 is guided up through passage 40 formed between the side walls of the hopper 4 and kettle body 1 to cause the control 8 to disconnect power to the heating element 6 upon its sensing of the steam.
  • a float 46 incorporating a permanent magnet is mounted for vertical movement in the lower region 7.
  • a normally-open reed switch 47 is housed in the side wall of the kettle body 1 adjacent the float 46 and is electrical ⁇ ly connected to a controller 48 for controlling power to the heating element 6.
  • the illustrated kettle is of the "cordless” type and is removably mounted on a base 49.
  • water is poured into the hopper 1, as shown by the larger arrow in Figure 1, and percolates down through the granular filter material contained in the filter cartridge 5. In this way most of the contaminants responsible for scum and scale are removed from the incom ⁇ ing water.
  • the filtered water then passes into the space 44 surrounding the cartridge 5 until the space is filled.
  • the water then flows through the aperture 45, as shown by the smaller arrow, and starts to fill the lower region 7. This causes the float 46 to float up within the kettle body and to close the reed switch 47 by magnetic force when a predetermined level of water is contained in the lower region 7.
  • Power is then supplied to the heating element 6 and the water contained in the lower region 7 of the kettle body is heated until steam rising up the passage 40 acti ⁇ vates the control 8 to disconnect the power to the element 6.
  • the heated water can be subsequently poured out of the lower region of the kettle body via the spout 2.
  • the layer of cooler water which remains in the space 44 helps to thermally insulate the cartridge 5 from the heated water and thus to alleviate overheating of the granular filter material contained in the cartridge.
  • a heat-reflective coating may be provided on the outer sur ⁇ face of the well 43.
  • the hopper 4 is advantageously removable from the kettle body 1 to enable the hopper to be more easily cleaned and to enable the kettle to be used without the filter means if desired.
  • the filter cartridge 5 is also removable from the hopper 1 to enable the cartridge to be regularly replaced.
  • the lid 17 also preferably includes a flange 50 which prevents filling of the kettle via the spout 2 and thus by-passing of the filter means.
  • Figures 2 and 8 show two alternative embodiments of the kettle in which like parts are labelled with like reference numerals with respect to Figure 1. The embodi ⁇ ment of Figure 2 differs from the embodiment of Figure 1 in that a double skin of thermal insulation surrounds the cartridge 5.
  • the well 43 is provided with inner and outer walls 51, 52 surrounding the cartridge 5 and forming an inner space 44 between the cartridge 5 and inner wall 51 and an outer space 53 between the inner and outer walls 51, 52.
  • a passage 54 is provided to bridge the outer space 53 so that the inner space 44 communicates directly with the lower region 7 of the kettle body.
  • the outer space 53 is made water-tight and may be filled just with air or it may contain a thermally-insulating material such as a closed cell expanded foam.
  • the inner and/or outer walls 51, 52 may be provided with a heat-reflective coating to reflect heat from the heated water in the lower region 7.
  • FIG. 2 operates in the same manner as the embodiment of Figure 1 and the filtered water which fills the inner space 44 flows into the lower region 7 via the passage 54.
  • This second embodiment thus provides additional thermal protection for the granular filter material of the cartridge 5.
  • the kettle also has the double skin of thermal insulation surrounding the cartridge 5.
  • an alternative passage 54 ' is ar ⁇ ranged vertically in the base of the well 43 and communi ⁇ cates with the lower region 7 of the kettle body via a tortuous or labyrinth water outlet path 55, through which water filtered through the cartridge 5 is constrained to pass before entering the lower region.
  • the location of the passage 54' means that the filtered water flowing out of the base of the cartridge 5 may not fill the inner space 44.
  • the amount of water remaining in the inner space depends on the rate of flow of water through the cartridge 5 relative to the rate of flow of water through the passage 54' and the outlet path 55.
  • the tortuous outlet path 55 inhibits inflow of heated water from the lower region 7 into the inner space 44 of the well 43 which would otherwise tend to heat the granular material of the cartridge 5.
  • the exit of the outlet path 55 faces the spout side of the kettle in order to prevent inflow of heated water when the kettle is tilted to pour water from the lower region 7 out of the spout 2.
  • FIG. 3 shows in more detail the filter cartridge 5 which is of the general type described in our British Patent Publication No. 2255771A.
  • the cartridge comprises a moulded plastics, generally cylindrical container 10, the upper end of which is formed with an encircling projecting rim 11.
  • the filter material of the cartridge 5 contains a water treatment agent 12 in a granular form, such as a mix of ion exchange resins and activated carbon.
  • the granular treatment agent is retained within the container 10 by a base cap 42 and a top cap 13.
  • the top cap has an outer peripheral flange 14, a dome shaped central portion 15 and an integral upstanding spigot 16, and the base cap is flat.
  • the cap 13, 42 are water-permeable and may be made of sintered plastics material, which may be produced by sin- tering suitably sized plastics granules in a mould which is passed through a microwave oven at a suitable speed to allow the granules to fuse together but to maintain their shape to create an integral but porous structure.
  • the top cap 13 is of sintered polypropylene and the base cap 42 is of sintered polyethylene.
  • Figures 4 to 7 illustrate an example of the lid 17 suitable for use on the kettle body 1. This lid incorpo- rates means for automatically monitoring usage of the filter so that the user knows when the filter cartridge needs to be replaced, as described in our co-pending Brit ⁇ ish Patent Application No. 9508096.6.
  • the lid 17 fits over the kettle body 1 so as to enclose the hopper 4.
  • an aperture 18 Towards the end 17a of the lid 17 which is intended to be adjacent the kettle spout, is an aperture 18, and the lid has at its centre a housing 19, which provides a knob to remove the lid from the kettle body and which contains a channel 20 and is closed by a cap 21.
  • the lid 17 also has a peripheral skirt 22 depending from its edge and ensuring a good fit inside the rim of the hopper 4 and kettle, and in the end of the skirt 22 which is intended to be adjacent the kettle handle is provided an opening 23.
  • slidable plate 24 has a portion 25 which acts as a cover to close the aperture 18.
  • An elongated portion 26 of the plate 24 extends through the skirt opening 23 and has at its end a user-operable thumb grip 27, which is intended to overlie the upper part of the handle of the kettle.
  • the plate 24 has a central longitudinal slot 29 which partly extends into the elongated portion 26.
  • a flange 30 extending into the slot 29 and also a vertical lug 31 are provided adjacent the cover portion 25.
  • a resilient member such as a spring 32 rests on the flange 30 and is located in the channel 20 with one end bearing against the lug 31 which protrudes into the channel 30. The other end of the spring 32 bears against the opposite end of the channel 20.
  • a rotary disc 33 is located below the plate 24, and at the centre of the disc 33 is an axle 34 which extends up through a hole (not shown) in the lid 17, inside the hous ⁇ ing 19, and is received in a cylindrical disc holder 35 which allows rotation of the disc 33 .
  • the disc 33 Around the periphery of the disc 33 are a plurality of equally spaced teeth 36 which engage with a tooth 37 on the underside of the plate 24 to form a ratchet mechanism.
  • An opposing tooth 38 seen in Figure 6, is provided on the underside of the lid 17 and is arranged to engage with the disc teeth 36 at a position substantially opposite the tooth 37.
  • the upper surface of the disc 33 has markings 39 in any suitable form which can be viewed through a window 41 in the lid 17.
  • the aperture 18 is opened by pulling the plate 24 towards the kettle handle, against the bias of the spring 32, by means of the thumb grip 27.
  • the tooth 37 which engages with the disc teeth 36, rotates the disc 33 clockwise through a preset angle depending on the number of teeth 36 and causes a different marking 39 to be visible through the window 41.
  • the thumb grip 27 is released the spring 32 urges the lug 31 and hence the entire plate 24 towards the spout, thereby reclosing the aperture 18 with the cover portion 25.
  • the tooth 37 slides over the sloping face of the tooth 36 with which it is engaged and the opposing tooth 38 prevents any anti-clockwise rotation of the disc 33.
  • the rotary disc 33 thus registers each time water can enter the hopper 1 via the open aperture 18 and the visible markings 39 on the disc 33 indicate the remaining useful life of the replaceable filter cartridge.
  • the rotation of the disc and its markings may be arranged such that one complete revolution of the disc represents the total life of each filter cartridge.
  • the hopper can be filled via the aperture 18 without removing the lid 17, and the kettle can be held by the handle and the aperture can be opened by means of the thumb grip 27 simultaneously with one hand. This enables the hopper 4 to be easily and quickly filled, for example from a running tap, via the aperture 18 with the corresponding usage of the filter cartridge being automatically registered by the rotary disc 33.
  • the present invention thus provides a kettle which filters incoming water before it is heated or boiled, rather than outgoing water after it has been heated or boiled. This therefore greatly reduces the amount of contaminants in the incoming water which are responsible for the build-up of scum and scale once the water is heat ⁇ ed, thereby alleviating the problems associated with exist ⁇ ing kettles.
  • the invention also enables a standard filter cartridge commonly used in cold water filter jugs to be used in the kettle without any adverse affects on the cartridge which may be caused by overheating.
  • the means for controlling the heating of the water in dependence on the water filtering rate need not comprise a magnetic float. It could alternatively comprise a low power element which slowly heats up the water as the lower region of the kettle body fills, or a position switch having "off", “simmer” and “boil” positions which could be manually or automatically controlled.
  • the heating element 6 could be electrically controlled to provide a heating profile matching the water flow rate.
  • pre ⁇ heating could take place, the full power being switched in by a bimetallic strip when a certain temperature is reached, or a delay switch could switch on the heating element after a pre-set initial delay.
  • Other possible water level sensing devices apart from the magnetic float, include a pressure pad which senses a predetermined volume of water, capacitance plates using the water to make the electrical circuit when the correct level has been reached, a flexible membrane in the base of the kettle body which operates a microswitc.h, and an optical sensor for sensing the water level .
  • Level indicators, sight tubes or insert-mounted clear panels could be used to give an external indication of the water level in the hopper and/or the lower region of the kettle body. Where magnetic floats are provided, the level indicators could make use thereof by incorporating a member attracted by the permanent magnet to move within a clear tube.
  • Various controls and heating systems other than that described above, for example a sub-floor heating system, with various methods of attaching the heating element to the kettle body or base, could be incorporated into the kettle.
  • the "cordless" kettle it could be of the “corded” type.
  • the lid could be made lockable with a sealing fit to prevent water spil- lage from the hopper.
  • filter means could be used as an alternative to the filter cartridge described and illus ⁇ trated, such as a "tea bag” type pouch containing loose filter media, or replaceable loose filter media contained in the bottom of the hopper.
  • a bag type pouch containing loose filter media, or replaceable loose filter media contained in the bottom of the hopper.

Landscapes

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

Abstract

Une bouilloire, du type pot, comprend un corps (1) en plastique moulé doté d'une ouverture supérieure refermable par un couvercle (17), d'un bec (2) et d'une poignée (3). Une trémie (4) est disposé dans le haut du corps (1) et reçoit une cartouche de filtre (5) montée de façon amovible dans un puits cylindrique (43) formé dans la base de cette trémie (4) et descendant jusqu'au bas (7) du corps(1). Un élément chauffant électrique classique (6) est monté dans le bas (7) du corps de cette bouilloire. La trémie (4) et le corps (1) de la bouilloire présentent une forme telle que le bas (7) commnique avec le bec (2) ainsi qu'avec une commande (8) sensible à la vapeur montée dans la poignée (3). Pour utiliser la bouilloire, on verse de l'eau dans la trémie (4) par l'ouverture superieure, eau qui est ensuite contrainte de traverser la cartouche de filtre (5) avant d'entrer dans le bas (7) pour être chauffée par l'élément chauffant (6).
EP96900372A 1995-01-19 1996-01-18 Bouilloire Withdrawn EP0804114A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GBGB9501034.4A GB9501034D0 (en) 1995-01-19 1995-01-19 A kettle
GB9501034 1995-01-19
GB9521245 1995-10-17
GBGB9521245.2A GB9521245D0 (en) 1995-01-19 1995-10-17 A kettle
PCT/GB1996/000090 WO1996022045A1 (fr) 1995-01-19 1996-01-18 Bouilloire

Publications (1)

Publication Number Publication Date
EP0804114A1 true EP0804114A1 (fr) 1997-11-05

Family

ID=26306341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900372A Withdrawn EP0804114A1 (fr) 1995-01-19 1996-01-18 Bouilloire

Country Status (2)

Country Link
EP (1) EP0804114A1 (fr)
WO (1) WO1996022045A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743285B1 (fr) * 1996-01-04 1999-05-28 Moulinex Sa Filtre destine a equiper un recipient d'ebullition d'eau et recipient comportant un tel filtre
GB9717115D0 (en) * 1997-08-14 1997-10-22 Walker David M Filter kettle
US6103114A (en) * 1998-01-09 2000-08-15 Recovery Engineering, Inc. Pour-through water treatment carafe
GB2334665A (en) * 1998-02-26 1999-09-01 Windmill Plastics Kettle with water filter
DE19846583C2 (de) * 1998-10-09 2002-11-07 Brita Gmbh Wasserfiltervorrichtung mit einer Auffangkanne und mit Heizelement
DE19905600A1 (de) * 1999-02-11 2000-08-17 Brita Gmbh Wasserfiltervorrichtung mit Kochkanne
GB2392370B (en) * 1999-12-23 2004-05-26 Strix Ltd Electric water heating appliances
ES2274815T5 (es) 1999-12-23 2011-03-31 Strix Limited Electrodomésticos para calentar agua.
DE10031169A1 (de) 2000-06-27 2002-04-04 Bsh Bosch Siemens Hausgeraete Elektrischer Wasserkocher mit einer Einfüllöffnung im Deckel
GB2397745B (en) * 2003-02-03 2006-02-08 Strix Ltd Water heating appliances
GB2397744B (en) * 2003-02-03 2006-03-15 Strix Ltd Water heating appliances
DE102004026188A1 (de) 2004-05-28 2005-12-29 Brita Gmbh Filterkatusche und Vorrichtung zur Filtration von Flüssigkeiten
DE102004026167A1 (de) * 2004-05-28 2005-12-22 Brita Gmbh Filterkartusche und Vorrichtung zur Filtration von Flüssigkeiten
WO2006040556A1 (fr) * 2004-10-13 2006-04-20 Kenwood Limited Appareils generateurs de vapeur comprenant un moyen de traitement d’eau
DE102006050302B4 (de) 2006-10-23 2017-05-24 Aquis Wasser-Luft-Systeme Gmbh, Lindau, Zweigniederlassung Rebstein Tank, Filterpatrone und Gerät mit Tank
CN205963785U (zh) * 2016-04-22 2017-02-22 飞利浦(中国)投资有限公司 电热烧水器具
CN114271656B (zh) * 2022-01-28 2022-09-16 上海超高环保科技股份有限公司 多功能微量元素缓释壶及其制作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2255771B (en) * 1991-05-01 1995-02-08 Waymaster Limited Improvements in or relating to water treatment devices
GB2268680B (en) * 1991-11-05 1994-06-29 Strix Ltd Water heating jugs
FR2701372B1 (fr) * 1993-02-15 1996-12-27 Seb Sa Récipient à bec verseur, en particulier bouilloire électrique.
FR2708452B1 (fr) * 1993-07-29 1997-09-05 Moulinex Sa Machine à infusion comportant un dispositif de purification d'eau.
FR2712474B1 (fr) * 1993-11-16 1997-12-19 Moulinex Swan Holdings Ltd Bouilloire électrique équipée d'un filtre.
GB9407799D0 (en) * 1994-04-20 1994-06-15 Kenwood Marks Ltd Filter jugs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9622045A1 *

Also Published As

Publication number Publication date
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