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WO2009081156A1 - Appareil de chauffage de liquide - Google Patents

Appareil de chauffage de liquide Download PDF

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Publication number
WO2009081156A1
WO2009081156A1 PCT/GB2008/004249 GB2008004249W WO2009081156A1 WO 2009081156 A1 WO2009081156 A1 WO 2009081156A1 GB 2008004249 W GB2008004249 W GB 2008004249W WO 2009081156 A1 WO2009081156 A1 WO 2009081156A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
heating
heating chamber
mode
liquid
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.)
Ceased
Application number
PCT/GB2008/004249
Other languages
English (en)
Inventor
Vincent Joseph Garvey
Colin Moughton
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.)
Strix Ltd
Original Assignee
Strix 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 to JP2010540171A priority Critical patent/JP2011507649A/ja
Priority to CN2008801274266A priority patent/CN101951819A/zh
Priority to US12/810,438 priority patent/US20110058798A1/en
Priority to AU2008339615A priority patent/AU2008339615A1/en
Priority to EP08863628A priority patent/EP2240053A1/fr
Priority to CA2710299A priority patent/CA2710299A1/fr
Application filed by Strix Ltd filed Critical Strix Ltd
Publication of WO2009081156A1 publication Critical patent/WO2009081156A1/fr
Priority to IL206547A priority patent/IL206547A0/en
Anticipated expiration legal-status Critical
Priority to ZA2010/04678A priority patent/ZA201004678B/en
Priority to AU2010100783A priority patent/AU2010100783A4/en
Ceased legal-status Critical Current

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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
    • A47J27/2105—Water-boiling vessels, e.g. kettles electrically heated of the cordless type, i.e. whereby the water vessel can be plugged into an electrically-powered base element
    • 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
    • A47J31/00—Apparatus for making beverages
    • A47J31/04—Coffee-making apparatus with rising pipes

Definitions

  • This invention relates to a liquid heating apparatus for heating/boiling liquids such as water.
  • the present invention provides a liquid heating apparatus having a first mode of operation in which a first volume of water can be heated and a second mode of operation in which a second, smaller volume of water can be heated and automatically dispensed.
  • a single apparatus can be used either to heat and dispense a small volume of water rapidly, or to heat or boil a larger quantity of water more conventionally.
  • This has the advantage of allowing the user to select the appropriate mode of operation according to the volume of water required at any particular time, but without the cost associated with separate appliances for these tasks or the need to find space for multiple appliances on a kitchen worktop.
  • the relative volumes of water that can be heated in either mode is determined by the relative maximum capacities; at least in preferred embodiments the first mode of operation could be used to heat a volume of water that is sufficiently small that it could have been heated in the second mode instead.
  • the volume of water that can be heated in the second mode may be fixed or might be variable - e.g. by a user.
  • the apparatus could be provided with separate reservoirs for the two respective modes of operation, but in preferred embodiments a common reservoir is provided. This could be arranged to dispense water (or another liquid) to respective heating arrangements depending upon whether the first or second mode of operation was being employed, but in preferred embodiments the apparatus is arranged to heat all the water in the reservoir in the first mode of operation, or a smaller, predetermined amount of water from the reservoir in the second mode of operation.
  • the apparatus preferably comprises a removable reservoir which is advantageous in facilitating filling, since the reservoir can be removed from the rest of the apparatus and taken e.g. to a tap to fill it.
  • the apparatus is also arranged such that water heated in the first mode of operation can be manually dispensed from the removable vessel.
  • the removable vessel can, preferably, resemble an ordinary kettle and it will be appreciated therefore that in these embodiments the apparatus essentially comprises a standard water boiling kettle but the apparatus is also configured to be able to heat and dispense water "on demand" if the volume required is small enough.
  • a common heating means could be employed to heat water in either the first or second mode of operation.
  • a reservoir could comprise means to divide off a small volume therefrom which can be heated in the second mode of operation.
  • independent heating means are provided for the first and second mode of operation respectively. This might have some advantages in terms of optimising each heater for its particular use and also lends itself particularly to embodiments where essentially a complete water boiling kettle is provided for operation in the first mode but which, when placed on the apparatus, allows water from the kettle to enter the heater for the second mode of operation. It will be appreciated that in such embodiments the kettle could be operated independently of the rest of the apparatus, only needing to be placed on the rest of the apparatus when the second mode of operation was required.
  • the invention provides an apparatus for heating liquid comprising a removable liquid heating vessel comprising a heater for heating liquid therein, the apparatus further comprising a second heating chamber arranged to heat liquid and dispense it through an outlet, wherein said second heating chamber is filled with liquid from the removable liquid heating vessel.
  • one or both heaters are arranged to heat water to boiling.
  • the removable liquid heating vessel provides the first mode of operation and the second heating chamber provides the second mode.
  • the heater for heating liquid in the first mode of operation e.g. the heater of the liquid heating vessel in the aspect of the invention set out above, to comprise a heater plate with a resistance heating element, e.g. a sheathed element, formed on or mounted to the underside of the plate.
  • a resistance heating element e.g. a sheathed element
  • the heater is arranged to close an opening in the base of the vessel as is well-known in the art of kettles.
  • the heater of the second heating chamber in the aspect of the invention set out above could take any convenient form, e.g. a tubular heater or some other form of flow heater, but preferably a chamber is provided in which the liquid is heated to the desired temperature and then dispensed.
  • the automatic dispensing in the second mode of operation could be effected by any suitable means.
  • a pump could be employed or the apparatus might be arranged such that the liquid is heated in an upper part thereof and dispensed lower down through hydrostatic pressure.
  • the water is arranged to be boiled in the second mode of operation and is dispensed from the apparatus with the aid of steam pressure generated during boiling.
  • a common mechanism is provided to cease heating of the liquid when it has reached a predetermined temperature, regardless of whether this is in the first or the second mode of operation. This could take any convenient form, e.g. electronic, and may be dependent upon the temperature to which the liquid is being heated.
  • the common means preferably comprises a steam switch, e.g. one comprising a snap acting bimetallic actuator, as is well-known in the art.
  • independent means are provided to cease heating in the respective modes.
  • a removable liquid heating vessel is provided, a conventional steam switch could be provided. This for example allows such a removable vessel to be as close as possible to a standard kettle which is beneficial both in terms of user acceptance and in being able to minimise re-tooling.
  • the removable liquid heating vessel preferably comprises valve means for selectively allowing liquid into the second heating chamber when the vessel is installed on the appliance and preventing leaking when it is removed.
  • the valve means could be provided in the vessel body, but preferably it is provided in a heater plate closing an opening in the base of the vessel. This is beneficial in having the valve lowermost in the vessel but also means that a standard heater plate incorporating the valve can be produced thereby allowing appliance manufacturers to use appliance bodies that have already been tooled.
  • valve means are also provided on the second heating chamber.
  • valve means are configured to close when there is a predetermined amount of water in the second heating chamber. This allows the second heating chamber to fill automatically to the required level. It could for example comprise a float valve.
  • a freely floating valve member is employed, which is more robust than a flap valve.
  • valve member is received in a housing which permits liquid flow through it but retains the valve member, the valve member having an upper position in which it is against a valve seat to close the valve and a lower position where it is retained in the lower part of the housing.
  • the valve member might take any convenient form. For example it could comprise a ball. Alternatively it could be pill, discus or squat-cylindrical in shape. In a preferred set of embodiments the valve member is downwardly tapering, e.g. frusto-conical. This has been found to minimise the chance of the valve member sticking during use.
  • the second heating chamber valve means is configured such that increasing pressure in the heating chamber tends to increase the closure pressure on the valve arising from the buoyancy of the valve member.
  • it comprises a resilient collar against which the valve member is pressed by internal pressure in the second heating chamber. This helps to prevent leakage of water or steam when the removable vessel is removed.
  • the apparatus comprises a switching arrangement which only permits energisation of one of said elements at time. This is advantageous as it allows each heater to be high power without running the risk of overloading the mains electrical supply by both being energised at once.
  • the switching arrangement could comprise a change-over switch such as a rocker switch.
  • the steam switch preferably acts on the aforementioned switching arrangement to switch off whichever heater is being energised.
  • the above-mentioned arrangement is considered to be novel and inventive in its own right and thus when viewed from another aspect the invention provides a switching arrangement for an electrical appliance, said switching arrangement comprising a switch having a first position in which a first circuit can be powered, a second position in which a second circuit can be powered and a third position in which neither of said circuits is powered, said arrangement further comprising a thermally responsive actuator arranged to act on said switch so as to move the switch from either of said first or second positions to said third position upon said actuator reaching a predetermined temperature.
  • an electronic or electro-mechanical arrangement is employed to prevent simultaneous energisation.
  • a relay is employed in series with the electrical supply to one of the heaters and is arranged such that the contacts thereof are opened when power is supplied to the other heater.
  • the arrangement is such as to cut off power to the removable liquid heating vessel when the heater of the second heating chamber is energised. This is beneficial in that it allows the electrical arrangement in the liquid heating vessel to be entirely standard.
  • the relay or other switching arrangement could simply cut power, to a cordless connector such as the Applicant's P72 connector which is used to supply power to the liquid heating vessel.
  • Fig. 1 is a schematic diagram showing the main parts of an apparatus embodying the invention
  • Fig. 2 is a schematic circuit diagram illustrating the electrical switch arrangement for the two heaters
  • Figs. 3a to 3d are a series of schematic diagrams showing use of an embodiment of the invention.
  • Fig. 4 is a further schematic diagram of a second embodiment
  • Fig. 5 is a perspective view of a third embodiment of the invention.
  • Fig. 6 is a perspective view, from a different angle, of the embodiment of Fig. 5 with the jug kettle part removed;
  • Fig. 7 is a view similar to Fig. 6 with the outer cover removed;
  • Fig. 8 is a partly exploded view of the parts above the heating chamber;
  • Fig. 9 is cross-sectional view through the heating chamber;
  • Fig. 10 is a different section through the heating chamber;
  • Fig. 11 is an enlarged sectional view of the valve between the jug kettle and the heating chamber
  • Fig. 1 shows the basic parts of an apparatus embodying the invention.
  • an almost-standard jug kettle 2 having a lifting handle 4 and a pouring spout 6.
  • the kettle is fitted with a heater arranged to close an opening in the base thereof and comprises a sheathed heating element mounted to the underside of a metal plate.
  • the kettle 2 also comprises the Applicant's standard Ul 7 control unit in order to switch off the heater in the event that it overheats due to being switched on dry or boiling dry.
  • a control unit includes the male part of a 360 degree cordless electrical connector.
  • the female part of the connector 8 is visible on the base part of the apparatus 10.
  • the kettle 2 differs from an ordinary one is that on its base it comprises a self- closing valve (not visible) which can be opened by penetration of a tube 12 protruding from the base 10 when the kettle 2 is placed on the base 10.
  • a self- closing valve (not visible) which can be opened by penetration of a tube 12 protruding from the base 10 when the kettle 2 is placed on the base 10.
  • At the lower end of the tube 12 is another valve in the form of a float valve 13, controlling the entry of water from the kettle 2 to a heating chamber in the base 10.
  • the heating chamber inside the base of the apparatus 10 has another heater 30 at the underside thereof which is similar to the heater in the kettle 2.
  • the base heating chamber is connected to a dispensing spout 14 which protrudes from the base part 10 and ends with a downward loop for dispensing heated water into a cup 16 or other receptacle placed beneath it.
  • a vertical steam tube 18 with a narrow neck at its upper end, beyond which is a thermally responsive snap-acting bimetallic actuator 20.
  • the bimetal 20 is positioned such that it also lies above the spout 6 of the kettle 2 when it is positioned on the base unit 10.
  • Fig. 2 is a schematic circuit diagram showing the switching arrangement. It will be noted from this that the bimetal 20 acts on a change-over type rocker switch 36.
  • the rocker switch 36 has three positions. In the left and right positions it can complete a circuit between a common terminal 22, connected to the live side of the mains supply, and either one of two other terminals 24, 26, connected respectively to the element 28 in the kettle 2 and the element 30 in the base heating chamber. In the central position of the switch 36, neither circuit is completed.
  • each element can be at the maximum power rating for the mains supply - e.g. 3 kW in the UK.
  • the bimetallic actuator 20 when it reaches its operating temperature (e.g. ninety degrees C), after coming into contact with steam, acts on the switch 36 to return it to the central, open position (depicted in Fig. 2) in which neither element is energised.
  • Fig. 4a shows the apparatus with the kettle 2 placed on the base part 10 and with a cup 16 placed beneath the dispensing spout (not visible).
  • the user removes the kettle 2 from the base unit 10 and fills it from a tap in the conventional way (Fig. 4b). It is then replaced on the base part 10, thereby allowing the tube 12 to penetrate the bottom of the kettle and so allow water to be drawn out from it subject to the float valve 13 being open (i.e. if the base heating chamber is empty).
  • a user can boil a relatively large volume of water (e.g. up to two litres). This is done by selecting the appropriate position for the rocker switch 36. This energises the kettle element 28 so that it boils the whole contents of the kettle 2. When the water has boiled, the steam produced will cause the bimetal 20 to operate which in returns the rocker switch 36 to the central, off position which interrupts power to the cordless connector 8 and so de-energises the element 28 in the kettle.
  • a more conventional steam switch arrangement could be employed in the kettle 2 itself. With a 3 kW heating element it would take approximately 4 minutes to boil two litres of water. Once the element has been switched off after the water has boiled, the kettle 2 can be picked up and the water poured out in the normal way (Fig. 3c).
  • a second mode of operation can be employed. This is done by selecting the other position of the rocker switch 36 (Fig. 3d) and thereby energising the in the base chamber heater 30. This rapidly heats the small volume of water in the chamber to boiling, with the steam thereby produced entering the steam tube 18 and actuating the bimetal 20 and returning the switch 36 to the central position so switching off the element.
  • the increase in pressure associated with the water in the chamber being boiled forces it up through the dispensing spout 14 and into the cup 16. A cupful of water can be boiled and dispensed in approximately 30 seconds.
  • Fig. 4 shows schematically a further embodiment.
  • This has a similar arrangement of a removable kettle 2' with its own element (not shown) and a side-entry water feed tube 12' for drawing water from the kettle 2' for rapidly heating and automatically dispensing a small, predetermined body of water through the spout 14' to the cup 16.
  • a flow heater 30' instead of a heater on the underside of an enclosed base heating chamber, there is a flow heater 30' for heating the water for the second mode of operation.
  • Fig. 5 shows a perspective view of a further embodiment of the invention.
  • This broadly comprises a removable liquid heating vessel in the form of a jug kettle 40 which is placed on a stand 42 which also serves to support a hot water dispensing chamber 44 with its dispensing spout 45 by means of a pillar 46.
  • the kettle 40 is shown with the lid and outer handle moulding removed. This reveals a standard steam switch 48 such as the applicant's R48 steam control which is used to switch the kettle off when water inside it boils.
  • Fig. 6 shows the apparatus with the kettle removed. This reveals a 360° cordless electrical connector 50 such as the applicant's P72 connector located centrally within the region of the base 42 which receives the kettle. To one side of the cordless electrical connector 50 is the outer housing of water valve 52, the purpose of which will be described later.
  • a 360° cordless electrical connector 50 such as the applicant's P72 connector located centrally within the region of the base 42 which receives the kettle.
  • the outer housing of water valve 52 To one side of the cordless electrical connector 50 is the outer housing of water valve 52, the purpose of which will be described later.
  • FIG. 7 shows a view of the main parts of the appliance with the outer covers removed.
  • a heating chamber 58 with which the valve 52 selectively communicates.
  • Extending from the side of the heating chamber 58 are two tubes 60, 62 which connect the interior of the heating chamber 58 to the interior of the dispensing chamber 44. The purpose of these two tubes will be described later.
  • Fig. 8 shows a partially exploded view of the parts above the heating chamber. This shows that the 360° cordless connector 50 is received in a special recess 60 in the top face of the heating chamber 58. A channel 62 is provided to accommodate the wires coming from the connector 50.
  • the connector 50 is held in place by a plate 64 which is screwed, riveted or otherwise attached to the top of the heating chamber 58.
  • the securing plate 64 also provides the outer valve housing 52.
  • the outer valve 52 housing fits over an upstanding annular wall 66 on the top of the heating chamber with a novel resilient annular sealing member 68, which will be described in more detail later, interposed between them.
  • the heating chamber 58 is formed from upper and lower parts which are clamped together by clamp rings 70, 72 which are screwed together by a series of boss and screw arrangements 74.
  • Fig. 9 shows a vertical cross-section through the heating chamber 58. From this figure can be seen the sheathed resistance heating element 76 bonded to an aluminium diffuser plate 78 which is in turn bonded to the underside of a stainless steel heater plate 80, the foregoing construction being similar to that conventionally used in water-boiling kettles.
  • the heater plate 80 is attached to the upper body of the heating chamber 58 by means of a peripheral channel 82 which is crimped over a downwardly depending wall portion of the heating chamber in accordance with the applicant's Sure Seal system which is described in greater detail in WO 96/18331.
  • a section through one of the tubes 60 connecting the heating chamber 58 to the dispensing chamber (not shown).
  • Fig. 10 also shows a vertical cross-section through the heating chamber 58, although in this instance the section is taken through a plane parallel to that of Fig. 9.
  • the lower end of the vent tube 62 fits over a spigot 86 which opens into a hole at the top of the interior of the heating chamber 58.
  • Fig. 11 shows a vertical cross-section through the kettle 40 seated on top of the heating chamber 58.
  • the kettle 40 has a side wall 88.
  • the underside of the kettle is closed by a circular stainless steel heating plate 90, on the underside of which is provided an aluminium diffuser plate 92 and a sheathed resistance heating element (not visible).
  • a hole is formed towards the edge of the heater plate 90 to accommodate the vertically protruding spigot portion 94 of the kettle part of the valve mechanism.
  • This spigot portion 94 is sealed against the hole in the heater plate 90 by means of a grommet 96.
  • the kettle valve part Beneath the spigot portion 94, the kettle valve part comprises two concentric annular shrouds: an inner shroud 98 and an outer shroud 100.
  • the diameter of the outer shroud 100 is such that it fits over the outer housing 52 of the heating chamber valve part and it has a bevelled edge to aid location.
  • a sprung valve arrangement comprising a vertically movable valve member 102 which has at the top a valve head 104 which is biased towards a corresponding valve seat 106 by a compression coil spring 108.
  • the coil spring acts between the underside of the valve seat 106 and a ring 110 at the bottom of the valve member 102.
  • an upward force is being applied to the lower ring 110 of the valve member thus lifting the valve head 104 away from the valve seat 106 to permit water to pass through the valve.
  • the coil spring 108 acts to close the valve and therefore prevent further passage of water.
  • the components provided on the heating chamber side of the valve arrangement comprise the outer housing 52 (mentioned previously with reference to Figs. 6, 7 and 8) having a central, chamfered opening which receives the inner shroud 98 of the kettle valve housing.
  • This outer housing 52 therefore passes, during coupling of the two valve parts, between the inner and outer shrouds 98, 100 of the upper part.
  • Inside the outer housing 52 is the annular sealing member 68 which provides a fluid- tight seal against the upwardly projecting annular wall 66 which is an integral part of the top of the heating chamber 58.
  • the sealing member 68 has a central annular protrusion which forms an upwardly open annular channel which receives and seals against the lower edge of the inner shroud 98 of the kettle valve part.
  • an angled annular flange 112 which extends radially outwardly so that it has a degree of flexibility in the axial direction.
  • Beneath the sealing member 66 is a generally frusto-conical float valve member 114 which is able to move vertically but which is constrained in its downward travel by a valve stop member 116.
  • the top surface of the float valve member 114 presses against the angled annular flange 112 when it in the upper portion or its travel.
  • Fig. 12 shows a perspective view from above of the dispensing chamber 44 with the upper cover removed.
  • Fig. 13 shows a vertical cross-section through part of the chamber with the upper cover in place.
  • the main part of the dispensing chamber 44a is broadly bowl-shaped with the dispensing spout 45 in a distinct recess 44c at the centre. Extending round part of the rear edge is a raised, generally horizontal platform portion 44b into which the outlet pipe 60 and vent pipe 62 from the heating chamber emerge. It will be noted that these two tubes 60, 62 extend vertically some way into the dispensing chamber.
  • Mounted outside the dispensing chamber (but shown in Fig. 12 for reference) is an R48 steam switch 188 to which is attached the on/off rocker switch 54.
  • a vertical chimney 120 extends through, but is isolated from, the dispensing chamber 44 and opens just beneath the bimetallic actuator (not clearly visible in Figs. 12 and 13) of the steam switch 118. This allows cool air to pass over the bimetallic actuator after it has operated in order to allow it to reset relatively quickly.
  • the tube forming the outlet spout 45 extends vertically some way into the dispensing chamber 44 inside a concentric downwardly open tube 122 of slightly larger diameter which is mounted to the upper cover of the dispensing chamber.
  • the downwardly open tube 122 extends down just short of the annular recess 44c in the centre of the main part of the dispensing chamber 44a.
  • Fig. 14 shows a schematic circuit diagram showing the main electrical connections between various parts of the appliance. To the left of the diagram may be seen the line, neutral and earth connections from the mains lead (not shown).
  • the switch contacts of the steam switch 118 provided in the dispensing chamber are connected electrically in series between the line pole and the coil of a relay 124 (although not shown in this schematic diagram, some form of rectification might be provided).
  • the contacts of the relay 126 are of the change-over type with the common contact 126a connected to the line pole.
  • the normally-off relay contact 126b is connected to the heating element 76 provided on the base of the heating chamber 58.
  • the electrical connection to this element 76 is made by means of a modified U-series control having its characteristic pair of overheat- protection bimetallic actuators which act on respective normally-closed contacts 128a, 128b on the line and neutral side respectively of the element.
  • An indicator neon 130 is connected, in series with a suitable resistor 132, across the element 76 to indicate when the element is energised.
  • the normally-closed relay contact 126c is connected to the central, line terminal of the cordless electrical connector 50.
  • the neutral and earth terminals are connected directly to the corresponding inputs from the mains lead.
  • Fig. 14 To the right of the diagram in Fig. 14 is depicted the conventional electrical arrangement found in a kettle.
  • the heating element 134 is connected in series with the normally-open contact of the steam switch 48 and also in series with the normally-closed contacts 136a, 136b which are acted on by the overheat bimetals of a Ul 7 control.
  • an indicator neon 138 and corresponding resistor 140 are connected across the element 134 to indicate when it is energised.
  • the appliance of this embodiment can be operated in two separate modes.
  • the kettle 40 can be removed, filled and then replaced on the base.
  • the on switch (not shown) is pressed to close the contacts of the steam switch 48.
  • power can then be supplied through the cordless connector 50 to energise the element 134. Unless the user switches off again, heating will continue until the water in the kettle boils which causes the steam switch 48 to operate and disconnect the power to the element.
  • the kettle 40 can then be lifted up again and the boiling water poured out of its spout in a conventional manner.
  • the appliance When the appliance is first used, or the heating chamber 58 has otherwise been allowed to become empty, it must be filled with water. This is done by filling kettle 40 with water and replacing it the stand 42. This allows the water in the kettle 40 to drain through the valve arrangement shown in Fig. 11 into the heating chamber. More particularly, as the kettle 40 is replaced on the stand, the lower end ring 110 of the valve member 102 in the kettle valve part is forced up against the force of the coil spring 108 by its contact with the inner annular projection of the sealing member 68. This allows water to flow from the inside of the kettle 40, through the valve spigot portion 94, past the valve member 102 and into the heating chamber 58 through the centre of the sealing member 68 and over the edges of the float valve member 114.
  • the vent tube 62 allows air to be displaced from the chamber even after the lower part 86 of the outlet tube has been covered.
  • the float valve member 114 will gradually be raised by the water until such time as it seals against the annular flange 112 on the lower face of the sealing member 68 with sufficient force to prevent any further water entering the heating chamber 58. If the kettle 40 should now be lifted up again, the coil spring 108 will close the valve head 104 against the valve seat 106 inside the kettle valve housing, thus preventing leakage of water from the kettle. Similarly, the buoyancy pressure of the float valve member 114 against the compliant annular flange 112 at the bottom of the sealing member 68 will prevent water from spurting out of the lower part of the valve arrangement. When the kettle 40 is replaced, although the kettle side of the valve 104, 106 will be opened again, no further water will flow since the float valve member 114 will remain pressed against the annular flange 112.
  • the build-up of pressure inside the heating chamber 58 is limited by the vent tube 62 connected to the dispensing chamber 44 which is essentially at atmospheric pressure. This prevents water which has not been sufficiently heated from being ejected via the outlet tube 60 prematurely. It also reduces any tendency of the float valve member to 114 to 'wobble' against the sealing member 68. Together with the compliant annular flange, 122 this helps prevent further cold water entering the heating chamber during heating.
  • the pressure builds up and begins to force water up the outlet tube 60 and so into the dispensing chamber 44. As this continues, almost all of the boiling water in the heating chamber 58 is forced up the outlet tube 60 to fill the dispensing chamber 44. Water will continue to be forced up the outlet tube until the water level in the chamber 58 falls below the lower end of the downward extension of the outlet tube 88.
  • Figs. 12 and 13 it will be seen that boiling water initially enters the side chamber 44b and thereafter drains into the main part of the chamber 44a towards the annular recess 44c in the centre and so starts to fill the chamber main part 44a.
  • the level between the downwardly open tube 122 and the upwardly extending outlet spout 45 rises until the water begins to flow over the top edge of the outlet tube 45 and so down through the spout into a user's cup.
  • This sets up a siphon which causes virtually all of the water in the dispensing chamber 44 to be dispensed through the spout 45.
  • heating chamber 58 If the heating chamber 58 is operated without any water in it, for example if there is no water in the kettle 40 to refill the chamber after a previous use, then one or other of the bimetals in the modified U-series control protecting the element 76 will operate to open the respective contacts 128a, 128b.
  • a highly versatile appliance which can either be used as an ordinary kettle to heat a relatively large quantity of water or, if only a single cupful of water is required, it can be heated and dispensed very quickly and efficiently by means of the second mode of operation.
  • the kettle 40 then acts as a removable reservoir in this mode of operation which is in itself convenient as it allows easy refilling.
  • the provision of a relay to switch between the two elements avoids an electrical overload.

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

Abstract

La présente invention concerne un appareil de chauffage de liquide présentant un premier mode de fonctionnement dans lequel un premier volume d'eau peut être chauffé et un second mode de fonctionnement dans lequel un second volume d'eau plus petit peut être chauffé et distribué automatiquement. Le premier mode peut être mis en oeuvre par un récipient de chauffage de liquide amovible (40). Le second mode peut être mise en oeuvre par une seconde chambre de chauffage (58) dotée d'un élément chauffant (76), conçue pour chauffer le liquide et le distribuer à travers un orifice de sortie (45). La seconde chambre chauffante (58) est remplie d'eau provenant du récipient de chauffage de liquide amovible (40).
PCT/GB2008/004249 2007-12-24 2008-12-23 Appareil de chauffage de liquide Ceased WO2009081156A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CN2008801274266A CN101951819A (zh) 2007-12-24 2008-12-23 液体加热设备
US12/810,438 US20110058798A1 (en) 2007-12-24 2008-12-23 Liquid heating apparatus
AU2008339615A AU2008339615A1 (en) 2007-12-24 2008-12-23 Liquid heating apparatus
EP08863628A EP2240053A1 (fr) 2007-12-24 2008-12-23 Appareil de chauffage de liquide
CA2710299A CA2710299A1 (fr) 2007-12-24 2008-12-23 Appareil de chauffage de liquide
JP2010540171A JP2011507649A (ja) 2007-12-24 2008-12-23 液体加熱装置
IL206547A IL206547A0 (en) 2007-12-24 2010-06-22 Liquid heating apparatus
ZA2010/04678A ZA201004678B (en) 2007-12-24 2010-07-02 Liquid heating apparatus
AU2010100783A AU2010100783A4 (en) 2007-12-24 2010-07-22 Liquid heating apparatus

Applications Claiming Priority (2)

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GB0725235.6 2007-12-24
GBGB0725235.6A GB0725235D0 (en) 2007-12-24 2007-12-24 Liquid heating apparatus

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WO2009081156A1 true WO2009081156A1 (fr) 2009-07-02

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CN (2) CN101951819A (fr)
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GB2466839A (en) * 2009-01-12 2010-07-14 Strix Ltd Liquid heating devices
WO2011077136A1 (fr) * 2009-12-21 2011-06-30 Strix Limited Appareil de chauffage de liquide
US10182688B2 (en) 2013-05-28 2019-01-22 Falcon Waterfree Technologies, Llc Splash-reducing and velocity-increasing cartridge exit
GB2567213A (en) * 2017-10-06 2019-04-10 Strix Ltd Liquid heating appliances and flow heaters

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GB0919331D0 (en) * 2009-11-04 2009-12-23 Strix Ltd Cordless electrical appliances
CN102770055A (zh) 2009-12-21 2012-11-07 施特里克斯有限公司 流加热器
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CN103672836B (zh) * 2012-08-31 2016-08-24 宁波新乐生活电器有限公司 一种自动加水汽化锅
KR101441287B1 (ko) * 2014-03-28 2014-09-23 주식회사 엔유씨전자 조리용포트의 제어장치
DE102014111508B3 (de) * 2014-08-12 2015-03-05 Vorwerk & Co. Interholding Gmbh Elektrisches Küchengerät
CN106419551A (zh) * 2016-09-30 2017-02-22 中山市柠檬环境科技有限公司 直热壶式饮水机
JP2018185082A (ja) * 2017-04-25 2018-11-22 株式会社ノーリツ 暖房給湯装置
GB2580597B (en) * 2019-01-14 2022-08-10 Strix Ltd Liquid heating appliances
GB2596866B (en) 2020-07-10 2022-08-24 Strix Ltd Liquid heating appliances
KR102726975B1 (ko) * 2024-05-21 2024-11-06 주식회사 해님 출수형 전기 주전자

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EP2077085A1 (fr) 2008-01-04 2009-07-08 Salton Europe Limited Améliorations concernant un appareil de chauffage de l'eau
EP2077085B1 (fr) * 2008-01-04 2013-10-16 Spectrum Brands (UK) Limited Améliorations concernant un appareil de chauffage de l'eau
GB2466839A (en) * 2009-01-12 2010-07-14 Strix Ltd Liquid heating devices
WO2011077136A1 (fr) * 2009-12-21 2011-06-30 Strix Limited Appareil de chauffage de liquide
US10182688B2 (en) 2013-05-28 2019-01-22 Falcon Waterfree Technologies, Llc Splash-reducing and velocity-increasing cartridge exit
GB2567213A (en) * 2017-10-06 2019-04-10 Strix Ltd Liquid heating appliances and flow heaters
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Also Published As

Publication number Publication date
JP2011507649A (ja) 2011-03-10
AU2010100783A4 (en) 2010-08-19
IL206547A0 (en) 2010-12-30
ZA201004678B (en) 2011-09-28
CN105326398B (zh) 2021-05-07
US20110058798A1 (en) 2011-03-10
CN101951819A (zh) 2011-01-19
CA2710299A1 (fr) 2009-07-02
CN105326398A (zh) 2016-02-17
RU2010128467A (ru) 2012-02-10
KR20100117577A (ko) 2010-11-03
AU2008339615A1 (en) 2009-07-02
EP2240053A1 (fr) 2010-10-20
GB0725235D0 (en) 2008-02-06

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