WO1998016147A1 - Recipients a eau bouillante chauffes electriquement - Google Patents

Recipients a eau bouillante chauffes electriquement Download PDF

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Publication number
WO1998016147A1
WO1998016147A1 PCT/GB1997/002856 GB9702856W WO9816147A1 WO 1998016147 A1 WO1998016147 A1 WO 1998016147A1 GB 9702856 W GB9702856 W GB 9702856W WO 9816147 A1 WO9816147 A1 WO 9816147A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
electrically heated
heating element
heated water
water boiling
Prior art date
Application number
PCT/GB1997/002856
Other languages
English (en)
Inventor
Robert Andrew O'neill
Robert Henry Hadfield
Antonio Martin Gaeta
Original Assignee
Otter Controls 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10801475&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1998016147(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Otter Controls Limited filed Critical Otter Controls Limited
Priority to AU47121/97A priority Critical patent/AU4712197A/en
Publication of WO1998016147A1 publication Critical patent/WO1998016147A1/fr

Links

Classifications

    • 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
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21041—Water-boiling vessels, e.g. kettles electrically heated with heating elements arranged outside the water vessel
    • 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
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/21066—Details concerning the mounting thereof in or on the water boiling vessel

Definitions

  • This invention concerns improvements relating to electrically heated water boiling vessels such as electric kettles and hot water jugs for example.
  • Electric kettles and hot water jugs and the like have conventionally incorporated electric immersion heating elements in the form of a wire wound, mineral insulated, metal sheathed heating element proper affixed to an element head plate serving for the attachment of the heating element to the vessel, commonly at an aperture in a side wall thereof.
  • planar heating elements have been proposed which comprise a substrate on one side of which there is provided a resistance heating element in the form of a printed or otherwise formed resistive track or layer.
  • the substrate might for example comprise a thin sheet of stainless steel on one side of which there is formed an electrically insulating dielectric layer, of glass for example, and the resistance heating element might be formed on the dielectric layer with another protective electrically insulating dielectric layer, also of glass for example, formed on top of the resistance heating element.
  • an element protector control adapted and arranged to switch off the power to the heating element in a sensed element overtemperature situation
  • a steam sensor adapted and arranged to switch off the power to the heating element in response to the generation of steam when water is boiled in the vessel.
  • Element protector controls have commonly comprised one or more bimetallic elements arranged in close heat transfer relationship with the heating element and arranged to operate an electric switch in the control in response to the element temperature rising above a predetermined normal operating range
  • steam sensors have commonly comprised a bimetallic or other thermally sensitive element, a shape memory effect (SME) device for example, arranged at a location of the vessel whereat steam will impinge upon the thermally sensitive element when water boils in the vessel.
  • SME shape memory effect
  • the element protector control has conventionally been coupled to the heating element head plate on the side thereof opposite to the heating element proper, namely the dry side of the head plate, and the steam sensor has commonly been accommodated at an upper location of the vessel, commonly in a handle structure, adjacent to an aperture in the vessel wall permitting steam generated within the vessel to access the thermal sensor of the steam control.
  • Integrated element protector and steam sensor controls are also known which associate in a unitary structure an element protector control as aforesaid and a steam sensor control as aforesaid.
  • the X-type element protector control manufactured and marketed by us which is described in GB 2 194 099 with reference particularly to Figures 3A, 3B and 3C of the drawings thereof and the J-type steam sensor manufactured and marketed by us which is described in GB 2 212 664.
  • the X-type element protector control and the J-type steam sensor can be utilized in stand alone manner, or the J-type steam sensor can be plugged into the top of the X-type element protector to form an integrated combination.
  • the base of an electrically heated water boiling vessel incorporating a planar electric heating element is compartmentalized to provide segregation between steam sensor and element protector controls associated with the heating element and a steam tube is provided for admitting to the steam sensor location steam that is generated when water is boiled in the vessel.
  • the vessel includes a bottom or base moulding providing for the attachment of the planar heating element to a vessel body part so as to constitute the bottom of the vessel or at least part thereof, the said moulding including a compartment for locating the steam sensor segregated from the element protector control and provision being made for admitting steam to the said compartment from the vessel interior.
  • Figures 1A to IF show a first exemplary embodiment of the invention
  • Figure 1A being an underside plan view of the base of an exemplary water boiling vessel
  • Figures IB and 1C being sectional side elevation views on the lines A...A and B...B of Figure 1A respectively
  • Figure ID being an enlarged view of part of Figure IB showing in more detail a steam sensor compartment
  • Figures IE and IF being perspective views from opposite sides of the embodiment
  • Figures 2A to 2F show a second exemplary embodiment of the invention in views respectively similar to the corresponding views in Figures 1A to IF;
  • Figures 3A to 3F show similar views of a third exemplary embodiment of the invention.
  • Figures 4A to 4F show similar views of a fourth exemplary embodiment of the invention.
  • Figures 1A to IF illustrate the form of the base or bottom of an electrically heated water boiling vessel configured according to an embodiment of the present invention. Only part of a base or bottom wall 1 of the vessel is shown and it will be appreciated that the remainder of the vessel will be designed by the appliance manufacturer .
  • a planar electric heating element 2 is secured within an aperture formed in the bottom 1 of the vessel by means of a moulded plastics material chassis ring 3 which is formed of two parts, namely a top or upper chassis ring 4 and a bottom or lower chassis ring 5 , which are adapted to be secured together by means of self-tapping screws introduced into registering bores 6 and 6' formed in the two parts, the bores in the top part 4 being closed at their innermost ends as shown in Figure 1C.
  • the top and bottom chassis rings 4 and 5 are formed with opposed surfaces which serve to clamp therebetween the edges of the planar heating element 2 and the surrounding edges of the aperture that is formed in the bottom 1 of the vessel, the respective opposed surfaces being spaced apart from each other by a distance appropriate to the thickness of the heating element 2 and of the vessel wall 1.
  • a seal 7 is provided between the opposed surfaces of the top and bottom chassis rings 4 and 5.
  • the bottom chassis ring 5 is formed with an integral extension 8 defining an enclosure for accommodating a steam sensor with positive segregation from an element protector control mounted on the heating element 2.
  • Figures 1A and IE show an exemplary form of element protector control 9 mounted to the underside of the heating element 2 and further show an exemplary form of steam control 10 accommodated in the enclosure 8.
  • the illustrated element protector control is the X2 control manufactured and sold by us and this control is substantially as described in GB 2 283 156.
  • the illustrated sensor 10 is a J-type steam sensor manufactured and sold by us and this steam sensor is substantially as described in GB 2 212 664.
  • Alternative forms of element protector and steam sensor controls are available and could be employed in the practice of the present invention.
  • the extension part 8 which defines the enclosure for the steam sensor has an integrally formed steam pipe 11 which extends outwardly of the enclosure through an aperture 12 provided in the vessel bottom 1.
  • a grommet seal 13 of suitable heat resistant material ensures that the passage of the steam pipe 11 through the aperture 12 does not result in leakage from the vessel.
  • the steam pipe 11 will extend to above the operating full water level of the vessel and may be provided with a flotation type valve to protect against water flooding into the steam pipe if the vessel is overfilled.
  • the steam pipe serves to deliver to the steam sensor enclosure 8 steam which is generated when water boils within the vessel, so as to cause the steam sensor to operate.
  • the enclosure 8, as moulded integrally with the bottom chassis ring 5, is open on its underside to enable installation of the steam sensor 10.
  • a moulded plastics cover 14 is however provided which fits into the open underside of the enclosure as best shown in Figure ID.
  • the cover 14 is apertured at 15 to allow steam condensing in the enclosure 8 to drain therefrom and furthermore includes a hollow spigot 16 which is adapted to fit into the open lower end of the steam pipe 11.
  • a vent 17 is formed in that side of the conjoined spigot and steam pipe which faces the interior of the enclosure 8 for allowing steam in the steam pipe to access the steam sensor 10.
  • the cover 14 could be part of an appliance bottom moulding of the vessel, rather than a separate part as illustrated.
  • the steam sensor 10 and its wetted environment within the enclosure 8 is well separated and segregated from the dry environment of the element protector control 9, thereby obviating or at least minimizing any risk of premature failure occasioned by water vapour or condensate reaching the element protector control.
  • the heating element 2 could for example be constructed as a resistance heating track or layer formed, with appropriate electrical insulation, on a substrate such as for example a stainless steel disc.
  • the element could alternatively be constructed as a plate, formed of aluminium for example, having clamped or clenched to its under surface a heating element proper of the wire wound, mineral insulated, metal sheathed type, such elements being known per se.
  • the water boiling vessel could be of the cordless type in which the vessel is adapted to be powered via a base unit when the vessel is set upon the base, the vessel part and the base part having co-operating electrical connector systems which come together to enable the heating element in the vessel to be powered via the base when the vessel part is set on the base part.
  • electrical connector systems are known per se and include systems which enable the vessel to be set upon the base in any relative rotational orientation, one such system being described in GB 2 285 716.
  • FIGS 2A to 2F show an embodiment which is similar to the embodiment of Figures 1A to IF and differs principally therefrom in that the heating element 2 is mounted in the chassis moulding 3 at an inclination, with the chassis parts 4 and 5 and the seal 7 correspondingly differently shaped.
  • the mounting of the heating element 2 at an angle in this manner, and with the element protector control 9 mounted to the element at or near to its uppermost edge, ensures that the heating element portion nearest to the control 9 begins to overheat first if, for example, the vessel lid is left off and the vessel begins to boil dry, the falling water level first exposing the upper part of the heating element whereat the control 9 is located.
  • Figures 3A to 3F show yet another embodiment which is very similar to the embodiment of Figures 1A to IF, the principal difference in this case residing in the fact that the enclosure 8 for accommodating the steam sensor 10 is open on its upper side and is adapted to be closed by juxtapositioning of the enclosure with the vessel bottom 1 during assembly.
  • the steam vent 17 within the enclosure 8 can be formed by use of suitable cores during the moulding operation for forming the bottom chassis part 5.
  • Figures 3A to 3F denote parts corresponding to like parts in the embodiment of Figures 1A to IF.
  • FIGS 4A to 4F show yet another embodiment having distinct similarities to the embodiments described in the foregoing.
  • the enclosure 8 for the steam sensor 10 is defined as an integral part of a bottom moulding 20 of the vessel which fits over the lower chassis ring 5 and may be secured thereto.
  • the enclosure 8 is open on its underside, as in the embodiment of Figures 1A to IF, and a closure 14 is provided.
  • the steam pipe 11 in this embodiment is also formed as an integral part of the bottom moulding 20.
  • the heating element 2 is shown mounted at an inclination, as in the second embodiment, but it could be mounted on the level as in the first embodiment.
  • the inclined heating element arrangement of Figures 2A to 2F and 4A to 4F could be incorporated into the embodiments of Figures 1A to IF and 4A to 4F.
  • the heating element 2 could be arranged to have a different, preferably lower, power output density in the regions thereof which is juxtaposed with the bimetallic sensor of the element protector control 9 for the purpose of achieving better compatibility between the operating temperature of the element and the temperature at which the element protector control will operate.
  • Other modifications that might occur to the skilled reader might be to form the seal 7 as an integral part of one or other or both of the upper and lower chassis rings 4 and 5.
  • the electrical connections to the heating element 2 via the element protector control 9 have not been shown and neither have the electrical connections to the steam sensor 10. These electrical connections will however cause no difficulty to the skilled reader and could be formed by means of discrete wires coupled to electrical terminals of the element protector control and of the steam sensor for example.
  • the heating element 2 being of the kind comprising electrically resistive tracks formed on a substrate as aforementioned
  • the steam sensor 10 could be connected in circuit with the element protector control 9 by way of suitably formed conductor tracks provided on the heating element 2, there being an extension of the heating element substrate into the steam sensor enclosure 8 for the purpose of enabling such conductor tracks to access the steam sensor.
  • the arrangement could further be such that the steam sensor is mechanically switched into its OFF condition whenever the vessel part of the appliance is lifted from its base, thereby avoiding the undesirable scenario of an emptied vessel being set back upon its base with the steam sensor switched ON, provision being made in the design of the appliance for the trip lever of the steam sensor 10 to mechanically interact with the electrical connector system of the cordless appliance, which provides for the supply of power to the vessel part through the base, in such a manner as to obtain this facility.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

L'invention concerne un récipient à eau bouillante chauffé électriquement, qui comprend un élément (2) chauffant plat et présente un dispositif (9) de régulation protégeant ledit élément et permettant d'éteindre l'alimentation en électricité dudit élément (2) chauffant, lorsqu'une température excessive a été détectée. Ce récipient comporte également un détecteur (10) de vapeur pour éteindre l'élément chauffant en réponse à la production de vapeur lorsque l'eau bout dans le récipient. Le dispositif (9) de régulation protégeant l'élément chauffant et le détecteur (10) de vapeur sont situés dans la partie inférieure du récipient qui est compartimentée de manière à séparer l'environnement potentiellement humidifié du détecteur (10) de vapeur du dispositif (9) de régulation protégeant l'élément chauffant, et ainsi éviter tout problème électrique.
PCT/GB1997/002856 1996-10-16 1997-10-16 Recipients a eau bouillante chauffes electriquement WO1998016147A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47121/97A AU4712197A (en) 1996-10-16 1997-10-16 Electrically heated water boiling vessels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9621517A GB2318452B (en) 1996-10-16 1996-10-16 Improvements relating to electrically heated water boiling vessels
GB9621517.3 1996-10-16

Publications (1)

Publication Number Publication Date
WO1998016147A1 true WO1998016147A1 (fr) 1998-04-23

Family

ID=10801475

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/002856 WO1998016147A1 (fr) 1996-10-16 1997-10-16 Recipients a eau bouillante chauffes electriquement

Country Status (4)

Country Link
CN (3) CN1935068A (fr)
AU (1) AU4712197A (fr)
GB (2) GB2356337B (fr)
WO (1) WO1998016147A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329759B (en) 1997-09-25 2001-09-05 Otter Controls Ltd Improvements relating to electrically heated water boiling vessels
EP0948924A1 (fr) * 1998-04-07 1999-10-13 Seb S.A. Bouilloire électrique de sécurité
GB9808634D0 (en) * 1998-04-24 1998-06-24 Koninkl Philips Electronics Nv Heating apparatus and heating element assembly method
GB0010089D0 (en) * 2000-04-25 2000-06-14 Strix Ltd Electrical liquid heating vessels and heaters therefor
GB0117732D0 (en) 2001-07-20 2001-09-12 Strix Ltd Electrical beverage making apparatus
NL2001690C2 (en) * 2008-06-16 2009-12-17 Otter Controls Ltd Device and method for generating steam, and heating element for use in such a device.
GB2477944B (en) 2010-02-18 2015-04-01 Otter Controls Ltd Cordless electrical appliances
CN104490266A (zh) * 2015-01-12 2015-04-08 潘桂周 煮水器及其制作方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524698A1 (de) * 1985-07-11 1987-01-15 Stiebel Eltron Gmbh & Co Kg Schalteinrichtung fuer einen elektrischen kochendwasserbereiter
US4645910A (en) * 1985-08-30 1987-02-24 Algonquin Mercantile Corporation Steam responsive thermostatic control arrangement for electric kettles
EP0595085A1 (fr) * 1992-10-26 1994-05-04 Moulinex S.A. Bouilloire électrique
DE4403638A1 (de) * 1994-02-05 1995-08-10 Volz Abc Elektrogeraete Gerät zum Erhitzen von Flüssigkeiten
DE9421379U1 (de) * 1994-07-05 1995-09-28 ABC-Elektrogeräte Volz GmbH & Co, 73230 Kirchheim Vorrichtung zum Erwärmen von Wasser
WO1995034187A1 (fr) * 1994-06-09 1995-12-14 Strix Limited Recipients pour chauffer un liquide
GB2291324A (en) * 1994-07-07 1996-01-17 Pifco Ltd Kettle for boiling small quantities of water using a non-flat bottom
DE29603838U1 (de) * 1996-03-01 1996-04-25 Petra-Electric Peter Hohlfeldt GmbH & Co, 89331 Burgau Wasserkocher
DE29607645U1 (de) * 1996-04-26 1996-07-11 Chao, Ming Hui, Yen Shui, Tainan Mehrzweck-Warmwasserbereiter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB719962A (en) * 1952-05-19 1954-12-08 Simplex Electric Co Ltd Improvements in vessels for heating liquids
GB2045588B (en) * 1979-03-23 1983-09-07 Taylor J C Water-boiling containers
DE3711637A1 (de) * 1987-04-07 1988-10-27 Ego Elektro Blanc & Fischer Elektro-heizgefaess
GB9302965D0 (en) * 1993-02-15 1993-03-31 Strix Ltd Immersion heaters
GB9411573D0 (en) * 1994-06-09 1994-08-03 Strix Ltd Liquid heating vessels
GB9417243D0 (en) * 1994-08-26 1994-10-19 Strix Ltd Thermally sensitive controls

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524698A1 (de) * 1985-07-11 1987-01-15 Stiebel Eltron Gmbh & Co Kg Schalteinrichtung fuer einen elektrischen kochendwasserbereiter
US4645910A (en) * 1985-08-30 1987-02-24 Algonquin Mercantile Corporation Steam responsive thermostatic control arrangement for electric kettles
EP0595085A1 (fr) * 1992-10-26 1994-05-04 Moulinex S.A. Bouilloire électrique
DE4403638A1 (de) * 1994-02-05 1995-08-10 Volz Abc Elektrogeraete Gerät zum Erhitzen von Flüssigkeiten
WO1995034187A1 (fr) * 1994-06-09 1995-12-14 Strix Limited Recipients pour chauffer un liquide
DE9421379U1 (de) * 1994-07-05 1995-09-28 ABC-Elektrogeräte Volz GmbH & Co, 73230 Kirchheim Vorrichtung zum Erwärmen von Wasser
GB2291324A (en) * 1994-07-07 1996-01-17 Pifco Ltd Kettle for boiling small quantities of water using a non-flat bottom
DE29603838U1 (de) * 1996-03-01 1996-04-25 Petra-Electric Peter Hohlfeldt GmbH & Co, 89331 Burgau Wasserkocher
DE29607645U1 (de) * 1996-04-26 1996-07-11 Chao, Ming Hui, Yen Shui, Tainan Mehrzweck-Warmwasserbereiter

Also Published As

Publication number Publication date
GB2356337A (en) 2001-05-23
CN1935068A (zh) 2007-03-28
GB2318452B (en) 2001-04-18
AU4712197A (en) 1998-05-11
GB0104986D0 (en) 2001-04-18
CN1494855A (zh) 2004-05-12
CN100450405C (zh) 2009-01-14
GB2318452A (en) 1998-04-22
GB9621517D0 (en) 1996-12-04
CN1239871A (zh) 1999-12-29
CN1149046C (zh) 2004-05-12
GB2356337B (en) 2001-08-01

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