WO2008119966A2 - Cuves de chauffage de liquide - Google Patents

Cuves de chauffage de liquide Download PDF

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Publication number
WO2008119966A2
WO2008119966A2 PCT/GB2008/001102 GB2008001102W WO2008119966A2 WO 2008119966 A2 WO2008119966 A2 WO 2008119966A2 GB 2008001102 W GB2008001102 W GB 2008001102W WO 2008119966 A2 WO2008119966 A2 WO 2008119966A2
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
liquid
appliance
heating
heater
Prior art date
Application number
PCT/GB2008/001102
Other languages
English (en)
Other versions
WO2008119966A3 (fr
Inventor
Robert Henry Hadfield
Peter Hallam Wright
Antonio Martin Gaeta
Michael Collinson
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
Priority claimed from GB0721858A external-priority patent/GB2448009A/en
Application filed by Otter Controls Limited filed Critical Otter Controls Limited
Priority to GBGB0817907.9A priority Critical patent/GB0817907D0/en
Priority to GBGB0817975.6A priority patent/GB0817975D0/en
Publication of WO2008119966A2 publication Critical patent/WO2008119966A2/fr
Priority to PCT/GB2008/003737 priority patent/WO2009060192A2/fr
Priority to EP08846935A priority patent/EP2227722A1/fr
Priority to CN200880124266XA priority patent/CN102187292A/zh
Publication of WO2008119966A3 publication Critical patent/WO2008119966A3/fr

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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
    • A47J27/21166—Constructional details or accessories

Definitions

  • the present invention relates to liquid heating vessels, and particularly those comprising a lower, electrically heated liquid vessel, an upper liquid vessel and means for heating the upper vessel and the lower vessel.
  • the tea maker comprises a lower electrically heated vessel in the f ⁇ rrrT ⁇ f a kettle with a lid.
  • the kettle has a water boiling setting and a 'keep warm setting' which keeps water at a substantially constant temperature at or below boiling.
  • the water is added to tea leaves in a specially designed teapot which is then placed on top of the kettle in place of the lid.
  • the teapot is kept warm by steam or hot air rising from the kettle, particularly in 'keep warm mode'.
  • a liquid heating appliance comprising a lower, electrically heated liquid vessel, an upper liquid vessel that is mounted or removably mountable on the lower vessel, and a heater arranged to heat one or both of the lower liquid vessel and the upper liquid vessel.
  • the heater is a radiant heater, for example a halogen heater.
  • the radiation generated by the radiant heater may include light from the visible part of the electromagnetic spectrum, and the radiant heater may be arranged to direct the visible light into the upper vessel such that the level of liquid within the upper vessel is discernible by a user.
  • the visible light may be directed into a space between an inner wall and an outer wall of the upper vessel, and/or into the liquid within the upper vessel.
  • the upper vessel may include at least a transparent or translucent portion arranged such that the visible light can be seen by a user.
  • the visible light may alternatively or additionally be directed into the lower vessel, which may include at least a transparent or translucent portion arranged such that the visible light can be seen by a user.
  • the visible light may be provided by a light source that does not also act as a heater.
  • the radiant heater may be positioned in or on a floor or sidewall of the lower vessel. There may be provided a plurality of radiant heaters arranged at respective different heights on the sidewall. The radiant heaters may be selectively switchable to provide varying heating power to the lower vessel.
  • the heating effect of the radiant heaters on the liquid in the lower vessel may vary automatically according to the liquid level, with the liquid being heated predominantly by those heaters that are immersed in the liquid.
  • the radiant heater may alternatively or additionally be arranged in or around a top portion of the lower vessel, and may be arranged to direct radiant heat in a downward direction into the lower vessel.
  • the upper vessel may be arranged in thermal contact with the radiant heater so as to be warmed by thermal conduction therefrom.
  • a liquid heating appliance comprising a lower, electrically heated liquid vessel, an upper liquid vessel mounted or removably mountable on the lower vessel, and a heater arranged at a boundary between the upper liquid vessel and the lower liquid vessel so as to heat both the lower liquid vessel and the upper liquid vessel.
  • a liquid heating appliance comprising a lower liquid vessel and an upper liquid vessel mounted or removably mountable on the lower vessel, the lower liquid vessel including a first electric heater for heating liquid contained within the lower vessel, and the upper vessel being arranged to be heated by a second electrical heater discrete from the first electrical heater.
  • the second electrical heater is arranged to be switched off or with a reduced power when the upper vessel is removed from the lower vessel.
  • the second electrical heater may have a lower power rating than the first electrical heater.
  • the second electrical heater may be a self-regulating heater, such as a PTC heater.
  • a liquid heating appliance comprising a lower liquid vessel and an upper liquid vessel mounted or removably mountable on the lower vessel, the lower liquid vessel including a plurality of heaters arranged at respective different levels within the lower vessel.
  • the heaters may be self-regulating heaters arranged to provide a high heating power when immersed and a lower heating power when not immersed. The power levels of the heaters may be monitored so as to provide a level indication.
  • a liquid heating appliance comprising a lower liquid vessel and an upper liquid vessel mounted or removably mountable on the lower vessel, the lower liquid vessel including an inductive heating coil and the upper vessel including an inductively heatable material arranged to be heated by the inductive heating coil when the upper vessel is mounted on the lower vessel.
  • a liquid heating appliance comprising a lower, electrically heated liquid vessel and an upper liquid vessel mounted or removably mountable on the lower vessel in thermal contact therewith, wherein the upper liquid vessel is arranged so that that warm air from the lower vessel is retained in contact with a side wall of the upper vessel.
  • the upper vessel fits at least partially within the lower vessel so that at least part of the sidewall of the upper vessel is located within the lower vessel.
  • the upper vessel includes a hollow passage open to the lower vessel so that air rising from the lower vessel is trapped within the hollow passage in contact with the sidewall of the upper vessel.
  • the upper vessel may have an outer wall and an inner wall, the hollow passage being formed between the two walls.
  • a liquid heating appliance comprising a lower, electrically heated liquid vessel and an upper liquid vessel mounted or removably mountable on the lower vessel in thermal contact therewith, wherein the lower vessel includes a handle engageable with the upper vessel so as to retain the upper and lower vessels together.
  • Figures Ia to Ie show a Turkish tea maker in a first construction embodiment of the invention, respectively in side view, side view with teapot separated from kettle, cross-sectional view, perspective cut-away view and perspective view;
  • Figures 2a to 2c show a Turkish tea maker in a second construction embodiment of the invention, respectively in perspective view, perspective view with teapot separated from kettle, and cross-sectional partial view;
  • Figures 3 a to 3 g show a Turkish tea maker in a third construction embodiment of the invention, in perspective view showing in stages a fold-down handle being used to engage a teapot;
  • Figure 4 is a cross-sectional diagram of a Turkish tea maker in a first heating embodiment of the invention
  • Figure 5 is a cross-sectional diagram of a Turkish tea maker in an alternative first heating embodiment of the invention
  • Figure 6a is a cross-sectional diagram of a Turkish tea maker in another alternative first heating embodiment of the invention
  • Figure 6b is a cross-sectional diagram of a Turkish tea maker in another alternative first heating embodiment of the invention.
  • Figure 7 is a cross-sectional diagram of a Turkish tea maker in another alternative first heating embodiment of the invention.
  • Figure 8 is a cross-sectional diagram of a Turkish tea maker in a second heating embodiment of the invention.
  • Figure 9 is a cross-sectional diagram of a Turkish tea maker in an alternative second heating embodiment of the invention.
  • Figure 10 is a cross-sectional diagram of a Turkish tea maker in a third heating embodiment of the invention.
  • Figure 11 is a cross-sectional diagram of a Turkish tea maker in an embodiment of the invention including a level-sensing device. Detailed Description of the Embodiments
  • a Turkish tea maker comprises a kettle 1 removably mountable on a power base 2 that supplies power to the kettle 1 , for example via a cordless electrical connector (not shown) that supplies electrical power to an element (not shown) within the kettle 1, or by inductive heating.
  • the cordless connector is a 360° cordless connector, allowing free rotation of the kettle 1 on the base 2.
  • a teapot 3 is arranged to be mounted on top of the kettle 1 (See Fig. Ia), from which it can be removed (Fig. Ib) for pouring tea.
  • the teapot 3 has a double-walled construction: tea is contained within a vessel 6 having an inner wall 7, around which is arranged an outer wall 8 of the teapot. A hollow space 9 is formed therebetween with an open bottom so that hot air and/or steam 5 rising from the warm or boiling liquid 4 in the kettle passes into the hollow space 9, and thereby warms the inner wall 7 of the teapot.
  • the arrangement is shown in cutaway perspective in Figure Id, while Figure Ie shows the complete arrangement in perspective, by way of comparison.
  • the teapot 3 is of single- walled construction, having only inner wall 7.
  • the teapot 3 fits within the kettle 1, which thereby effectively forms the outer wall.
  • the teapot 3 has an upper rim 10 that abuts the top of the kettle 1, effectively forming a lid of the kettle. This arrangement makes the combined kettle and teapot more compact and stable.
  • the teapot 3 is arranged so that it can rest either on top of or within the kettle, depending on the relative rotational orientation. This may be achieved by having a non-circular opening in the top of the kettle, with a shape that conforms to the teapot 3 only in one or more relative orientations, for example a square opening into which a cuboidal teapot fits.
  • the kettle 1 has a handle 11 formed of two halves 11a, lib which can be folded down horizontally on respective sides of the top of the kettle, as shown in Figures 3a to 3c.
  • the kettle 1 has a lid 12 that can be removed and replaced by a teapot 3 that fits on top of the kettle, as shown in Figure 3d.
  • the two halves of the handle 11 are then folded up vertically so that they retain the teapot 3 therebetween, as shown in Figures 3e and 3f.
  • the handle 13 and spout 14 of the teapot 3 maybe retained between the two halves 11a, 1 Ib of the handle 11, which may be locked together by a catch or other locking means (not shown). In this way, the teapot 3 is held securely on top of the kettle 1 and the tea maker is easily transportable.
  • the teapot may also have a folding handle.
  • the kettle 1 of the first or second embodiment may be provided with a handle 11 as in the third embodiment, to secure the teapot 3 to the kettle 1.
  • heating power is provided by one or more halogen heaters or other radiant heaters, preferably which also emit visible light.
  • a halogen heater 22 is provided in a base section 20 of the kettle 1, so as to heat the water 4 by means of infrared radiation. Some of the infrared radiation passes through the water 4 and is incident on the inner wall 7 of the teapot 3 so as to keep tea warm within the vessel 6. In this way, the heating of the teapot 3 is not reliant on convection of hot air or steam from the kettle 1.
  • the teapot 3 may be preheated by the halogen heater 22 while the water 4 is heated up to boiling.
  • halogen heaters are that they generate visible light as well as infrared; the visible light serves to illuminate the water 4 so as to provide an easy visual indication of the level of the water 4, visible for example through a window in the side wall of the kettle 1.
  • the visible light may also illuminate the teapot 3.
  • the level of tea in the teapot 3 may be easily seen.
  • a particularly advantageous lighting effect may be achieved by illuminating the space 9 between the inner wall 7 and the outer wall 8 in this way, where the teapot is arranged as in the embodiment of Figure 1.
  • the base of the vessel 6 maybe transparent or translucent so that visible light passes into the tea, thereby producing a lighting effect which may be seen through transparent or translucent parts of the side wall of the teapot 3, or through its spout. This lighting effect is not purely aesthetic, but allows the strength of the tea to be discerned.
  • the halogen heater 22 may be positioned in or on a sidewall of the kettle 1 so as to irradiate the contents laterally.
  • a plurality of halogen heaters 22a-n are mounted in this way, in an array that extends in a substantially vertical direction up the sidewall.
  • the halogen heaters 22a-n may be selectively or individually switchable. In one example, substantially all the heaters 22a-n are energised for the heating mode, but only some of the heaters are energised for the keep warm mode. The level of the water 4 is generally lower when keep warm mode is required, since some of the water will have been poured out into the teapot 3, so that only lower ones of the heaters are energised. In another example, the heaters 22a-n are switched according to the detected level of the water 4, with only heaters below the water level being energised. Alternatively, only two halogen heaters 22 may be provided, with both heaters switched on for heating mode and only the lower heater switched on for keep warm mode.
  • the halogen heaters 22a-n may be switchable only as a group. In that case, heaters that are not immersed will still radiate heat, but may reach an equilibrium temperature while radiating less heat than the immersed heaters, by virtue of the lack of cooling from the water 4.
  • the internal side wall of the kettle may be reflective so as to direct infrared radiation back to the heaters and/or the water 4.
  • the halogen heater(s) may be positioned towards the top of the kettle and arranged to direct infrared radiation downwardly into the water 4.
  • the heater 22 is positioned on the underside of the teapot 3 or in a lid of the kettle, where the lid is not removable when the teapot 3 is mounted on the kettle 1. Waste heat from the heater 22 is conducted into the vessel 6 of the teapot, thereby keeping warm both the tea in the teapot 3 and the water 4 within the kettle 1.
  • the lid may provide a hotplate on which vessels other than the teapot 3, such as a coffee pot, may be kept warm. The lid also allows the kettle 1 to function while the teapot 3 is removed.
  • the power output of the heater 22 may be varied automatically according to the detected level of the water 4 and/or the tea.
  • the voltage provided to the heater 22 may be stepped down from mains voltage to a low voltage, such as 12V.
  • the low voltage can be safely conducted to the top of the kettle, for example through an electrical connection in the sidewall or the handle.
  • a halogen heater 22 is arranged towards the top of the kettle 1, so as to direct heat downwards at an oblique angle. Infrared radiation striking the side wall of the kettle may be reflected towards the bottom of the kettle 1.
  • the sidewalls may have a reflective surface so as to reflect infrared radiation.
  • the bottom surface and/or lower parts of the sidewall of the kettle 1 may have an infrared absorbing surface. In this way, the heating effect of the heater 22 is directed towards the bottom or lower parts of the kettle 1.
  • the halogen heater 22 may be arranged to direct infrared radiation upwards towards a sidewall which reflects the radiation towards the teapot 3.
  • the bottom surface of the teapot may be of a material that absorbs the radiation, or reflects the radiation back into the kettle 1.
  • a first heater 22a positioned in a base portion 20 of the kettle 1, as in the embodiment of Figure 4, and a second heater 22b positioned on the underside of the teapot 3 or in a lid of the kettle 1 and arranged to direct radiant or conducted heat onto the teapot 3 and/or into the vessel 6 of the teapot 3.
  • the second heater 22b is controlled independently of the first heater 22a so as to keep tea in the vessel 6 hot, but below boiling.
  • the power level of the second heater 22b may be controlled according to the detected level and or temperature of tea within the vessel 6.
  • an electrical contact is made between the kettle 1 and the teapot 3 when mounted thereon.
  • a low- voltage 360° connector may be provided between the kettle 1 and the teapot 3.
  • halogen heater(s) 22 As an alternative to the halogen heater(s) 22, another electrically powered combined heat and light source may be provided, such as a high-power LED array.
  • the heater(s) comprise one or more self-regulating heaters.
  • the heater or heaters comprise one or more PTC (positive temperature coefficient) resistors, and particularly resistors that exhibit a sharp rise in resistance at a critical temperature.
  • the critical temperature is selected to coincide with the heated liquid being at a temperature just below boiling.
  • a first PTC heater 22a heats the water 4 in the kettle 1, while a second PTC heater 22b heats tea in the vessel 6.
  • the first PTC heater 22a may be operable to heat the water 4 to boiling, whereupon the critical temperature is reached and the first PTC heater 22a operates as a keep warm heater.
  • another conventional heater may be provided to heat the water 4 up to boiling; this is advantageous where it is not practicable to provide a high-power PTC heater as the first PTC heater 22a.
  • a second PTC heater 22b is positioned so as to conduct heat into the vessel 6, and is operable to keep tea warm within the vessel 6.
  • the second PTC heater 22b may be provided around a rim of the top of the kettle 1.
  • the second PTC heater 22b may be provided in the teapot 3, which in this case makes an electrical contact with the kettle 1 for example as described above.
  • the water 4 within the kettle 1 is heated by plurality of PTC heaters 22a-n arranged at different levels along a side wall of the kettle 1.
  • PTC heaters 22a-n Those PTC heaters that are immersed are cooled to below their critical temperature and therefore provide a high heating output at least until the water 4 reaches boiling point, while those that are not immersed quickly reach their critical temperature and provide a low heating output.
  • the combined heating power of the PTC resistors 22a-n adjusts automatically to the level of the water 4.
  • the PTC resistors 22a-n act as a level sensor, and this effect may be used to provide a level output for use in an electronic control or level indicator, by detecting which of the PTC resistors are above their critical temperature, for example by measuring the voltage drop across each resistor.
  • PTC resistors may be provided within the vessel 6.
  • a single PTC resistor may be provided under the floor of the vessel, as in the embodiment of Figure 8.
  • a trace heating wire which may or may not be self-regulating.
  • heating power is provided by one or more inductive heaters.
  • an inductive coil 22 is provided around the rim of the kettle 1; the inductive coil 22 is connected to an AC frequency converter (not shown) for converting AC mains power to a suitable frequency for induction heating.
  • At least a portion of the vessel 6 comprises inductively heatable material, such as ferromagnetic or ferrimagnetic material, preferably iron or steel, such as stainless steel.
  • the floor and/or sidewalls of the vessel 6 may have a core of such inductively heatable material, with one or more surface layers or coatings resistant to corrosion while allowing thermal conduction from the core into the vessel 6.
  • the inductively heatable portion of the teapot 3 fits within the inductive coil so as to provide high inductive coupling. When the teapot 3 is removed from the kettle, the inductive heating effect is automatically removed.
  • the inductively heatable material may be provided on the top of the kettle, for example as a hotplate on which the teapot 3 or other vessels may rest.
  • the power level of the inductive heater(s) may be controlled according to the detected temperature of the tea within the vessel 6.
  • the inductively heatable material may be selected to have a Curie temperature that is reached when the contents of the vessel reaches the desired temperature, hi this case, the heating power is self-regulating.
  • the inductive coil 22 may act as an electromagnet
  • the teapot 3 may include diamagnetic or electrically conductive material such that the electromagnet applies an upward force on the teapot 3, so as to reduce the effective weight of the teapot 3 and therefore its friction against the kettle 1.
  • this may reduce the friction between the teapot 3 and the kettle 1, allowing the teapot 3 to be turned more freely relative to the kettle 1.
  • the teapot 3 may be made to levitate from the kettle 1, depending on the weight of the teapot 3; this may provide a visual indication of how much tea is in the teapot.
  • Means for stabilizing the teapot 3 may be provided; the stabilizing means may be magnetic, electromagnetic, or mechanical. Such stabilizing means may be used to centre the teapot 3 relative to the kettle 1, with or without the provision of an upward force.
  • the upward force may be provided by an electromagnet that does not act as an inductive coil.
  • heat may be conducted from the kettle 1 to the teapot 3 by means of a thermal bridge.
  • the thermal bridge may be in thermal contact with the heater 22 of the kettle 1 and/or with the water 4 within the kettle 1.
  • thermal conduction is used by means of the thermal bridge.
  • the kettle 1 and/or teapot 3 may be insulated so as to achieve the desired thermal equilibrium when the keep warm heater(s) is/are energised.
  • the kettle 1 may be thermally insulated so that heat escapes predominantly from the teapot 3, or vice versa, hi this way, a single heater 22 may keep both the water 4 and the tea at the required temperature.
  • the water 4 is kept warm by means of a heater 22 in thermal contact with the teapot 3, by means of thermal insulation of the kettle 1 or teapot 3 and/or by means of the arrangement of the heater, for example as shown in Figure 6.
  • the teapot may include a heat diffusing plate in the base of the vessel 6, to ensure uniform heating of tea and avoid localised boiling, which is detrimental to the flavour of the tea.
  • the power output of the heater(s) may be controlled according to the level of water or tea to be heated.
  • the level may be detected by means of a level sensor as described for example in our earlier applications GB0709164.8 and GB0711752.6, the contents of which are incorporated herein by reference.
  • the power output for a keep warm function may be controlled according to the detected level.
  • the keep warm mode of the kettle 1 may be entered after the heating mode is terminated, for example in response to detection of boiling. Alternatively, the keep warm mode may be switched independently of the heating mode.
  • Heating in keep warm mode may be regulated by controlling the power level of the heater, or by pulsing the heater on and off with a duty cycle that is varied so as to achieve the desired average level of heating. Periodically, such as after a predetermined number of cycles, the heating mode may be entered again to bring the water back to boiling and the keep warm mode is then entered once more.
  • the keep warm heater may switched off, or its power level reduced, when the teapot 3 is removed from the kettle. This may be achieved by a contact switch on or around the lid 12, or by other methods as described above.
  • the kettle 1 may be provided with a control that detects when the water 4 has reached a low simmer and/or a full boil; the keep warm mode may then be entered, or heating may be terminated altogether, hi keep warm mode, a timer may be set such that heating mode is entered periodically , such as every 2 minutes, so as to bring the water up to the boil or simmering point.
  • the control monitors the agitation of the water, which is indicative of simmering.
  • the control continues to monitor the agitation of the water, and reduce or eliminate the keep warm heating when a simmer is detected.
  • a steam sensor is no longer essential; this may be advantageous, because condensation in the control may be avoided, and the cost of a steam sensor need not be incurred.
  • a thermostat may also be provided to detect when the water has cooled below a minimum threshold, such that the keep warm mode needs to be entered. However, it is preferable that the heat input during keep warm mode is varied to match the heat loss from the water 4, such that cycling of the thermostat is avoided.
  • the agitation is monitored by a water level detector that is sensitive to small, rapid fluctuations of the water level as the water becomes agitated.
  • the agitation is monitored by an acoustic sensor that detects the characteristic sound of water reaching boiling point, such as the reduction in heating noise caused by a reduction in the collapse of steam bubbles within the water as the water reaches boiling.
  • an acoustic sensor that detects the characteristic sound of water reaching boiling point, such as the reduction in heating noise caused by a reduction in the collapse of steam bubbles within the water as the water reaches boiling.
  • the water level sensor is a distance- measuring device 23 situated at or around the top of the kettle 1.
  • the device may be a laser or ultrasonic distance measuring device.
  • the device 23 accurately measures fluctuations in the absolute distance to the water surface, and the control detects when the fluctuations exceed a predetermined level.
  • the predetermined level may vary dependent upon the amount of water in the vessel, which may also be determined by the device according to the absolute distance to the water surface.
  • the distance-measuring device 23 may be positioned substantially on the central vertical axis of the kettle 1, as shown in Figure 11, so that the accuracy of the water level accuracy measurement is not dependent upon the kettle 1 being vertical. Alternatively, there may be provided a plurality of distance measuring devices at different positions, so as to compensate for the angle of the kettle 1.
  • the distance measuring device(s) may be used to accurately measure the level of water during filling at the tap, when the kettle 1 is likely to held at an angle.
  • the distance-measuring device may be positioned outside the water reservoir of the kettle, and may be directed at the water surface through a window.
  • a water level sensor comprises a capacitive level sensor array positioned around the perimeter of the kettle 1, either within or outside the water reservoir. Such an array may also be used to measure the water level when the kettle 1 is at an angle.
  • a power source such as a battery or capacitor, may be provided in the kettle 1 so as to provide power to the water level sensor when the kettle 1 is removed from the power base 2.
  • the power source is rechargeable and is recharged when the kettle body 1 is connected to the power base 2.
  • At least some of the level sensor or sensing techniques described above may be used to detect the level or volume of liquid in a liquid heating vessel on or before commencement of a heating operation, to determine whether the liquid level is above a predetermined maximum and/or below a predetermined minimum level; if not, the heating operation may be inhibited, or an indication given to the user. In this way, unsafe operation of the vessel may be prevented.
  • At least some of the level sensor or sensing techniques described above may be used to detect the level or volume of liquid in a liquid heating vessel while the vessel is being filled.
  • a warning indication may be made to the user when a predetermined maximum level has been exceeded, hi the case of the tea maker described above, the kettle 1 may include a rechargeable power source so that the control may perform level detection when the kettle 1 is removed from the base 2.
  • the predetermined level may be set by the user, for example by means of a user interface. Preferably, this setting may be changed even when the kettle 1 is removed from the base 2. If the predetermined level is exceeded, the user interface 11 may give the user the option to change to a higher level and continue filling, or empty out some of the water until the current level is reached.
  • the kettle 1 could be prevented from being heated is the water level is above or below a predetermining level, or if the kettle 1 is on a sloping surface.

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

Abstract

La présente invention concerne une cuve de chauffage de liquide qui comprend une cuve inférieure de liquide électriquement chauffé et une cuve supérieure de liquide qui peut être montée sur la cuve inférieure. Diverses dispositions de chauffage sont fournies pour chauffer la cuve supérieure et/ou inférieure. La cuve supérieure de liquide peut être disposée de telle sorte qu'un air chaud depuis la cuve inférieure est maintenu en contact avec une paroi latérale de la cuve supérieure. Dans un autre mode de réalisation, la cuve inférieure comporte une poignée pouvant être engagée avec la cuve supérieure pour maintenir ensemble la cuve supérieure et la cuve inférieure.
PCT/GB2008/001102 2007-03-30 2008-03-26 Cuves de chauffage de liquide WO2008119966A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GBGB0817907.9A GB0817907D0 (en) 2007-11-07 2008-09-30 Liquid heating vessel and control
GBGB0817975.6A GB0817975D0 (en) 2007-11-07 2008-10-01 Liquid heating vessel and control
PCT/GB2008/003737 WO2009060192A2 (fr) 2007-11-07 2008-11-06 Récipient de chauffage de liquide et commande
EP08846935A EP2227722A1 (fr) 2007-11-07 2008-11-06 Récipient de chauffage de liquide et commande
CN200880124266XA CN102187292A (zh) 2007-11-07 2008-11-06 液体加热容器和控制装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0706304A GB0706304D0 (en) 2007-03-30 2007-03-30 Liquid healing vessels
GB0706304.3 2007-03-30
GB0721858A GB2448009A (en) 2007-03-30 2007-11-07 Liquid heating vessels
GB0721858.9 2007-11-07

Publications (2)

Publication Number Publication Date
WO2008119966A2 true WO2008119966A2 (fr) 2008-10-09
WO2008119966A3 WO2008119966A3 (fr) 2008-12-18

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Application Number Title Priority Date Filing Date
PCT/GB2008/001102 WO2008119966A2 (fr) 2007-03-30 2008-03-26 Cuves de chauffage de liquide

Country Status (4)

Country Link
CN (1) CN201332965Y (fr)
GB (1) GB0706304D0 (fr)
TR (1) TR200702784U (fr)
WO (1) WO2008119966A2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
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WO2011101642A2 (fr) 2010-02-18 2011-08-25 Otter Controls Limited Récipients à liquide chauffé et appareils électriques
CN103829800A (zh) * 2013-12-19 2014-06-04 太平洋协通贸易（深圳）有限公司 智能咖啡壶
CN103941779A (zh) * 2014-04-01 2014-07-23 昆山市张浦镇建茂电子厂 一种用于水的自动加热及调温的电子产品
CN104490280A (zh) * 2014-11-28 2015-04-08 广州杰创信息科技有限公司 一种电水壶的智能控制装置及控制方法
EA021144B1 (ru) * 2010-06-24 2015-04-30 Эксен Макине Санайи Ве Тикарет А.С. Бытовой электроприбор, содержащий керамическую емкость, и устройство для приготовления чая, содержащее этот электроприбор
CN107198447A (zh) * 2017-07-27 2017-09-26 北京小米移动软件有限公司 电水壶的控制方法、装置及电子设备
WO2018202371A1 (fr) * 2017-05-03 2018-11-08 Arcelik Anonim Sirketi Chauffe-eau intelligent et silencieux
WO2018210840A1 (fr) * 2017-05-15 2018-11-22 BEEM Germany GmbH Samovar
WO2019037978A1 (fr) * 2017-08-23 2019-02-28 Arcelik Anonim Sirketi Chauffe-liquide intelligent et silencieux

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EP2991529A4 (fr) * 2013-04-30 2017-03-22 Breville PTY Limited Appareil de carafe chauffé à deux parois et procédé
CN107440513A (zh) * 2017-04-28 2017-12-08 浙江苏泊尔家电制造有限公司 烹饪器具和用于烹饪器具的烹饪控制方法
GB201806962D0 (en) * 2018-04-27 2018-06-13 Strix Ltd Domestic countertop appliances
CN111010757B (zh) * 2019-12-20 2022-03-18 深圳市鑫汇科股份有限公司 电磁加热方法及电磁加热装置
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101642A2 (fr) 2010-02-18 2011-08-25 Otter Controls Limited Récipients à liquide chauffé et appareils électriques
EA021144B1 (ru) * 2010-06-24 2015-04-30 Эксен Макине Санайи Ве Тикарет А.С. Бытовой электроприбор, содержащий керамическую емкость, и устройство для приготовления чая, содержащее этот электроприбор
CN103829800A (zh) * 2013-12-19 2014-06-04 太平洋协通贸易（深圳）有限公司 智能咖啡壶
CN103941779A (zh) * 2014-04-01 2014-07-23 昆山市张浦镇建茂电子厂 一种用于水的自动加热及调温的电子产品
CN104490280A (zh) * 2014-11-28 2015-04-08 广州杰创信息科技有限公司 一种电水壶的智能控制装置及控制方法
WO2018202371A1 (fr) * 2017-05-03 2018-11-08 Arcelik Anonim Sirketi Chauffe-eau intelligent et silencieux
WO2018210840A1 (fr) * 2017-05-15 2018-11-22 BEEM Germany GmbH Samovar
CN107198447A (zh) * 2017-07-27 2017-09-26 北京小米移动软件有限公司 电水壶的控制方法、装置及电子设备
WO2019037978A1 (fr) * 2017-08-23 2019-02-28 Arcelik Anonim Sirketi Chauffe-liquide intelligent et silencieux

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GB0706304D0 (en) 2007-05-09
CN201332965Y (zh) 2009-10-28

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