EP1198741A1 - Perfectionnements relatifs aux recipients de chauffage d'eau - Google Patents

Perfectionnements relatifs aux recipients de chauffage d'eau

Info

Publication number
EP1198741A1
EP1198741A1 EP00946184A EP00946184A EP1198741A1 EP 1198741 A1 EP1198741 A1 EP 1198741A1 EP 00946184 A EP00946184 A EP 00946184A EP 00946184 A EP00946184 A EP 00946184A EP 1198741 A1 EP1198741 A1 EP 1198741A1
Authority
EP
European Patent Office
Prior art keywords
heating element
track
thick film
auxiliary heater
vessel
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
EP00946184A
Other languages
German (de)
English (en)
Inventor
Robert Andrew O'neill
Robin Keith Moore
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.)
Otter Controls Ltd
Original Assignee
Otter Controls Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9917131.6A external-priority patent/GB9917131D0/en
Priority claimed from GBGB9926533.2A external-priority patent/GB9926533D0/en
Priority claimed from GB0013545A external-priority patent/GB2354927B/en
Application filed by Otter Controls Ltd filed Critical Otter Controls Ltd
Publication of EP1198741A1 publication Critical patent/EP1198741A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0213—Switches using bimetallic elements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • G05D23/27535—Details of the sensing element
    • G05D23/2754—Details of the sensing element using bimetallic element
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • This invention concerns improvements relating to electrically powered
  • the vessel are well known, and commonly operate by responding to the
  • actuator a bimetal or shape memory effect device for example, is located.
  • thermal contact with the heating element and is calibrated to operate at a
  • heating appliance to be selected by the user, and bimetallic arrangements are
  • operating temperature of the bimetal is controllable by the user, or which
  • mechanism can be adjustable.
  • the creep bimetal is arranged to interact with the trip lever of the control
  • a thick film heating element comprises
  • heating track or layer on at least one side thereof, electrically
  • thermosensor is to have a thermal sensor associated therewith to be selectively adjusted
  • volume of water being heated will change correspondingly.
  • electrically powered water heating vessel has a thick film heating element, a
  • thermally-responsive control is located in thermal contact with a
  • Thick film heating elements are commonly manufactured by printing
  • the track temperature is related to the water temperature
  • the track temperature will be about 160°C, that is 60°C above the
  • control bimetal is normally set at about 180°C. If, on the
  • cordless vessel was lifted off its base and reset. On the X46 (auto cycling) or
  • bimetal senses the heater temperature.
  • variable resistor separate from the heating element
  • control knob accessible to the user of the appliance, but such a
  • control could be electronic, since the control of a
  • element m the form of a resistive track p ⁇ nted on the element, and to provide
  • resistive track included in circuit with the auxiliary heater there could also be
  • auxiliary track is the same as in the adjacent main power track so that both
  • va ⁇ able resistors with sliding contacts are well known and would be directly applicable to this construction.
  • the resistive track could be an arc preferably
  • adjustment arm could project from a slot in the wall of the vessel body and be
  • the arc could be formed as a
  • This sensor should have a low thermal
  • PTC sensor take the form of a PTC sensor, with an electronic control system, or preferably
  • contactstat would be approximately 105°C to avoid nuisance tripping du ⁇ ng
  • auxiliary heater track could be arranged to be adjustable to
  • a further aspect of the invention useful to maintain water at a preset
  • the heating is proposed to be
  • variable remake bimetal that is to say an adjustable
  • bimetal could be used with an adjustable auxiliary track power, in which case
  • thick film heating element of an electrically powered water heating vessel has
  • the thick film heating element so that, in use, its operation is dependent upon
  • Switching off the appliance on boil can be done by any of the known
  • heating element provided with an auxiliary heating track at a location whereat
  • thermocontrol for example a bimetallic control
  • both functions and preferably comprise respective variable resistance elements
  • the slider control preferably has an off position
  • a water heating vessel provided with such a heating element and with
  • heating element track and by the keep warm track can have an on/off control
  • the abovementioned slider or, more preferably, can have the two such controls
  • Such a water heating vessel can, with the tracks and
  • the keep warm track keeps the vessel contacts close to boiling, and a heat and keep warm mode wherein the slider control is positioned at an
  • Figure 1 illustrates in plan view an exemplary track layout of a thick
  • Figure 2 is a schematic circuit diagram showing a thick film heating
  • Figure 3 is a plan view of an alternative thick film heating element
  • Figures 4A, 4B, 4C and 4D show how a modified form of our X4
  • Figures 5 and 6 are plan views of yet further alternative thick film
  • Figure 7 is a plan view of yet another thick film heating element
  • Figure 8 is a circuit diagram illustrating the use of a thick film heating
  • the heating element proper 3 is made up of
  • heater track sections 4 which are joined by conductive b ⁇ dges 5 at their
  • the heating element shown is adapted for use with an X4 control having two
  • heating element m good heat transfer relationship therewith generally in the
  • heater track 11 is provided in the region 7 of the heating element which
  • resistive track section 13 which, in use,
  • auxiliary heater track 11 is coupled at one end to mam heater
  • the wiper 14 along the resistive track section determines the heat output of the
  • auxiliary heater 1 1 determines the operation of that bimetallic actuator of the X4 control that registers with
  • auxiliary heater 11 to be switched off when the vessel is to be used for boiling
  • knob is preferably such that contact between the resistive track section 14 and
  • the wiper 14 is made and broken with a snap action so as to minimize arcing
  • provided at the high resistance end thereof, may be configured to withstand
  • Figure 2 shows the thick film heating element of Figure 1 in an
  • boil control such as our aforementioned X4 control and with a steam control
  • controls are designated 21 and 22 and are designed to register with the regions
  • slider track 13 is designated 24, this position of the wiper serving to isolate
  • FIG. 3 shows an alternative thick film track layout designed
  • the thick film heating element of Figure 3 has regions 7 and 8
  • auxiliary heater track 11 which is connected to a track
  • Figures 4A to 4D illustrate the attachment of a modified X4 control to
  • FIG. 3 a thick film heating element as shown in Figure 3.
  • Figure 4A merely shows
  • control are affixed to the metal substrate 1 of the heating element, the
  • variable resistance track section 13 adapted to be contacted by a
  • the X4 control comprises a cordless vessel inlet connector 41 of the 360° type pioneered by us which enables a cordless vessel to be set
  • first and second heating element protector controls generally
  • Figures 4B, 4C and 4D show the modification to the X4 control.
  • metal chassis of the control has an extended part 51, which has a central pivot
  • a plastics moulding 55 has a pivot peg 56 and an overlapping arm 57 and is
  • chassis extension to prevent the moulding coming off its pivot and acts as a
  • pigtail of the brush assembly has a quick connect receptacle attached which is
  • moulding is greater than the angle subtended by the slider track so that at one
  • FIGS 5 and 6 show yet further alternative thick film track layouts
  • thick film heating elements of Figures 5 and 6 each have regions 7 and 8 designed to register with the bimetals of the X4 control and the region 7 has
  • auxiliary heater track 11 which is connected to a track
  • section 13 designed to cooperate with a control slider of the X4 control to
  • auxiliary track 1 1 is somewhat narrower, since it is of lower power and thus
  • the silver pads 15 have two purposes Firstly, it is known that making
  • auxiliary track is arranged to be the same as in the adjacent main power track
  • this arrangement enables a kettle or hot water
  • jug for example, selectively to provide boiling water, or water which has been
  • element 1 has arcuate main heater track sections 4 connected at their ends by
  • section 1 1 is connected between a tapping point 20 of the main heater track
  • An additional track section 21 is provided in the centre of the heating
  • the control that is used with the heating element of Figure 7 is a
  • the variant X4 has a third spring contact 22, in
  • the control is fitted with a high temperature bimetal blade
  • the potentiometer slider has
  • the slider contacts are not connected to anything, they have no
  • track 21 provides the maximum power to that track which is
  • the water may be any suitable material (thermostat) associated with it to operate.
  • the water may be any suitable material (thermostat) associated with it to operate.
  • the water may be any suitable material
  • the track is preferably targeted always to give a
  • thermostat bimetal will cycle occasionally, as
  • Dry boil protection of the system is provided by the dry boil bimetal of
  • the keep warm track 21 is positioned centrally to
  • auxiliary track 11 will operate, albeit somewhat more slowly because of the
  • buttons could be provided, one for the boil control, and one for the slider.
  • auxiliary heater 11 could be formed to exhibit a PTC (positive temperature coefficient of resistance) characteristic whereas the auxiliary heater 11 could be formed with
  • bimetallic actuators For example, an underfloor heating element of the metal

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Cookers (AREA)

Abstract

L'invention concerne un récipient de chauffage d'eau comportant un élément de chauffage à couche épaisse (3), cet élément de chauffage est équipé d'un interrupteur de protection bimétallique contre la surchauffe destiné à arrêter l'élément de chauffage lorsqu'il surchauffe, par exemple en cas de fonctionnement à vide. Ce récipient de chauffage peut chauffer de l'eau sélectivement à une température inférieure à la température d'ébullition, pour ce faire, l'élément de chauffage comporte un élément de chauffage auxiliaire (11) dans la zone d'action de l'interrupteur bimétallique et une piste résistive est connectée en série avec l'élément de chauffage auxiliaire et peut être métallisée sélectivement sur sa longueur, de manière à faire varier sa résistance efficace et donc à faire varier le courant dans l'élément de chauffage auxiliaire. L'élément de chauffage auxiliaire augmente le chauffage de l'interrupteur bimétallique à un niveau supérieur au fonctionnement normal, de manière qu'il fonctionne à une température inférieure au fonctionnement normal, ce qui permet d'arrêter le récipient avant qu'il n'atteigne la température d'ébullition. L'invention concerne également un connecteur intégré d'entrée d'appareil à 360° sans cordon et un interrupteur d'ébullition à sec comprenant un moyen de connexion sélective à une piste résistive.
EP00946184A 1999-07-21 2000-07-20 Perfectionnements relatifs aux recipients de chauffage d'eau Ceased EP1198741A1 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
GBGB9917131.6A GB9917131D0 (en) 1999-07-21 1999-07-21 Improvements relating to water heating vessels
GB9917131 1999-07-21
GBGB9918183.6A GB9918183D0 (en) 1999-07-21 1999-08-02 Improvements relating to water heating vessels
GB9918183 1999-08-02
GB9926533 1999-11-09
GBGB9926533.2A GB9926533D0 (en) 1999-07-21 1999-11-09 Improvements relating to water heating vessels
GB0013545 2000-06-02
GB0013545A GB2354927B (en) 1999-07-21 2000-06-02 Improvements relating to water heating vessels
PCT/GB2000/002814 WO2001006334A1 (fr) 1999-07-21 2000-07-20 Perfectionnements relatifs aux recipients de chauffage d'eau

Publications (1)

Publication Number Publication Date
EP1198741A1 true EP1198741A1 (fr) 2002-04-24

Family

ID=27447852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00946184A Ceased EP1198741A1 (fr) 1999-07-21 2000-07-20 Perfectionnements relatifs aux recipients de chauffage d'eau

Country Status (4)

Country Link
EP (1) EP1198741A1 (fr)
CN (1) CN100373280C (fr)
AU (1) AU6005700A (fr)
WO (1) WO2001006334A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2372421B (en) * 2001-02-19 2005-07-27 Strix Ltd Thermally sensitive controls
NL2001806C2 (en) * 2008-07-15 2010-01-18 Otter Controls Ltd Heating element and method for operating such a heating element.
GB2466219A (en) * 2008-12-12 2010-06-16 Otter Controls Ltd Thick film heating element
CN102434971A (zh) * 2011-12-28 2012-05-02 九阳股份有限公司 即热式开水器及其控制方法
KR102476376B1 (ko) * 2017-08-31 2022-12-12 현대자동차주식회사 전기차량의 냉각수 가열장치
CN109932930B (zh) * 2017-12-15 2021-07-20 佛山市顺德区美的电热电器制造有限公司 加热控制方法、装置、加热器具和计算机可读存储介质

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87203704U (zh) * 1987-03-14 1988-01-06 王宗稳 精确数字式变送器
NL8801182A (nl) * 1987-10-01 1989-05-01 Interconnection B V Verwarmingselement.
GB2305233A (en) * 1995-09-15 1997-04-02 Welwyn Components Ltd Water heater with thick film printed circuit
GB2318713B (en) * 1996-10-22 2000-07-12 Strix Ltd Electric heaters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0106334A1 *

Also Published As

Publication number Publication date
WO2001006334A1 (fr) 2001-01-25
CN100373280C (zh) 2008-03-05
CN1373866A (zh) 2002-10-09
AU6005700A (en) 2001-02-05

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