[go: up one dir, main page]

EP0624998A1 - Dispositif de sécurité pour éléments de chauffage dans les appareils domestiques où la température est régulée - Google Patents

Dispositif de sécurité pour éléments de chauffage dans les appareils domestiques où la température est régulée Download PDF

Info

Publication number
EP0624998A1
EP0624998A1 EP94201204A EP94201204A EP0624998A1 EP 0624998 A1 EP0624998 A1 EP 0624998A1 EP 94201204 A EP94201204 A EP 94201204A EP 94201204 A EP94201204 A EP 94201204A EP 0624998 A1 EP0624998 A1 EP 0624998A1
Authority
EP
European Patent Office
Prior art keywords
heating elements
safety device
heat
sensitive element
thermostat
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.)
Granted
Application number
EP94201204A
Other languages
German (de)
English (en)
Other versions
EP0624998B1 (fr
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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
Application filed by Candy SpA filed Critical Candy SpA
Publication of EP0624998A1 publication Critical patent/EP0624998A1/fr
Application granted granted Critical
Publication of EP0624998B1 publication Critical patent/EP0624998B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4285—Water-heater arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H05B3/82—Fixedly-mounted immersion heaters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/16—Washing liquid temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements

Definitions

  • the present invention relates to a safety device for heating elements in temperature-controlled home appliances, such as washing machines, washer-driers, dishwashers, deep-friers and such like.
  • Such overheating can be caused by the lack of the fluid to be heated, typically water in the case of washing machines, air flow in the case of washer-driers and cooking oil in the case of deep-friers.
  • the absence of water inside the cylinder causes a fast increase in the temperature of the heating resistance, and the possible burning of its insulator coating; this is clearly dangerous, as it involves the formation of an electrical short-circuit when the water inside the cylinder shall once again come into contact with the resistance.
  • Safety devices are known that are constituted by power supply switches triggered by devices sensitive to the external temperature of the heating resistance.
  • the object of the present invention is to provide a safety device that integrates the function of controlling the temperature of the fluid.
  • a safety device for heating elements in home appliances with a fluid subjected to temperature control wherein said temperature control is carried out by a thermostat having a heat-sensitive element immersed in said fluid, characterized in that said heat-sensitive element of the thermostat is also coupled thermally and mechanically, through thermally-conducting means, to said heating elements, to provide, by means of said thermostat, a combined control of the temperature of the fluid and of that of the heating elements.
  • said heat-sensitive element is fastened mechanically to a flange wherein said heating elements are fastened to the chassis of the home appliance.
  • the present invention it is possible to provide a safety device integrating the function of controlling the temperature of the fluid, with a consequent saving of components and thus of costs of production.
  • a first type of heating element is constituted by an armoured resistance 1, provided with a flange 2 for mounting on a chassis 3 of a home appliance; the flange 2 comprises two opposite metal plates 4, between which there is interposed a rubber seal 5. It is also provided with a pair of through holes 6 wherein there are inserted as many terminals 7 of the resistance 1; a third through hole 8 allows the insertion of an immersion thermostat 9, say of the non-adjustable type with trigger temperatures of 30°C and 90°C, whose heat-sensitive element 10 is provided with an elastic clip 11 in thermally-conducting material for connecting to the resistance 1.
  • the resistance 1 is located in the space between the bottom of the tank 16 and the bottom of the loading cylinder 17 (visible in Fig. 5); when the tank 16 has been filled with water, both the resistance 1 and the heat-sensitive element 10 of the thermostat 9 are immersed.
  • the heating step is reached, power is applied across the terminals 7 of the resistance 1; the passage of current in the resistance 1 causes it to heat up, and the water is also consequently heated up.
  • the heat-sensitive element 10 as well as controlling, in a manner known in itself, the temperature of the water during the washing cycle, also controls, through the clip 11, the temperature of the resistance 1 and, when this exceeds a given value, it triggers the switch 15 that cuts voltage from across the terminals 7 of the resistance 1.
  • a second type of heating element constituted by an armoured resistance with a longer linear extension with respect to the resistance 1.
  • a corresponding flange 19, similar to the flange 2, is again provided with through holes 20 wherein there are inserted as many terminals 21 of the resistance 18, and, in a central position, with a through hole 22 in which the thermostat 9 is inserted; the heat-sensitive element 10 is provided with a clamp 23 in a thermally-conducting material tightly attached to the resistance 18 by means of a rivet 24.
  • a lever 25 is hinged between two brackets 26 and allows, through two cams 27 (Figs. 5 and 6), the clamping of the two plates 4 of the flange 9 so as to compress the seal 5 and consequently clamp the resistance 18 and the thermostat 9.
  • thermostat 9 has, however, been replaced by a sensor bulb 29 that operates by expansion of a fluid, say, oil, inside a capillary 30 forming part of an adjustable thermostat; in such thermostats, commonly available commercially, the bulb 29 has dimensions that are unified with those of the thermostat 9.
  • the sensor bulb 29 is connected to the resistance 1 by means of an elastic clip 11.
  • FIG. 11 there is shown a third type of heating element constituted by an armoured resistance 31, provided with a flange 2 identical to that shown in Figs. 1, 2, 9 and 10.
  • This solution again uses an adjustable thermostat provided with a fluid-expansion sensor bulb 32, that is again provided with a capillary 30 and is in thermal and mechanical contact with the resistance 31 by means of a capillary 33, containing the expandable fluid, connected to the resistance 31 by means of an elastic clip 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
EP94201204A 1993-05-11 1994-05-02 Dispositif de sécurité pour éléments de chauffage dans les appareils domestiques où la température est régulée Expired - Lifetime EP0624998B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT93MI000942A IT1264405B1 (it) 1993-05-11 1993-05-11 Dispositivo di sicurezza per elementi riscaldanti in elettrodomestici a controllo di temperatura
ITMI930942 1993-05-11

Publications (2)

Publication Number Publication Date
EP0624998A1 true EP0624998A1 (fr) 1994-11-17
EP0624998B1 EP0624998B1 (fr) 1999-01-13

Family

ID=11366096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94201204A Expired - Lifetime EP0624998B1 (fr) 1993-05-11 1994-05-02 Dispositif de sécurité pour éléments de chauffage dans les appareils domestiques où la température est régulée

Country Status (4)

Country Link
EP (1) EP0624998B1 (fr)
DE (1) DE69415860T2 (fr)
ES (1) ES2127345T3 (fr)
IT (1) IT1264405B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019129A1 (fr) * 1994-01-13 1995-07-20 Strix Limited Appareil de chauffage de l'eau
GB2306284A (en) * 1995-07-19 1997-04-30 Otter Controls Ltd Electric heating elements
EP1795109A3 (fr) * 2005-12-09 2008-04-02 LG Electronics Inc. Générateur de vapeur pour un aspirateur, procédé pour commander un tel générateur, aspirateur comportant un tel générateur de vapeur et procédé de commande d'un tel aspirateur
WO2008096915A1 (fr) 2007-02-06 2008-08-14 Lg Electronics Inc. Appareil de chauffage, et générateur de vapeur et appareil ménager utilisant un appareil de chauffage et un générateur de vapeur
ITTO20080694A1 (it) * 2008-09-23 2010-03-24 Indesit Co Spa Macchina di lavaggio, in particolare una lavatrice, una lavasciugatrice o una lavastoviglie provvista di un dispositivo di rilevazione della temperatura della resistenza elettrica di riscaldamento del liquido di lavaggio.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1237240B (de) * 1955-09-20 1967-03-23 Licentia Gmbh Temperaturabhaengige Schaltvorrichtung
DE1815429A1 (de) * 1967-12-28 1969-07-24 Elpag Ag Chur Elektrischer Heizeinsatz
US3750429A (en) * 1971-03-26 1973-08-07 Westinghouse Electric Corp Control for an automatic washer
EP0275635A1 (fr) * 1986-12-15 1988-07-27 Redring Electric Limited Dispositifs de chauffage par immersion
WO1992005675A1 (fr) * 1990-09-17 1992-04-02 Strix Limited Rechauffeurs par immersion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1237240B (de) * 1955-09-20 1967-03-23 Licentia Gmbh Temperaturabhaengige Schaltvorrichtung
DE1815429A1 (de) * 1967-12-28 1969-07-24 Elpag Ag Chur Elektrischer Heizeinsatz
US3750429A (en) * 1971-03-26 1973-08-07 Westinghouse Electric Corp Control for an automatic washer
EP0275635A1 (fr) * 1986-12-15 1988-07-27 Redring Electric Limited Dispositifs de chauffage par immersion
WO1992005675A1 (fr) * 1990-09-17 1992-04-02 Strix Limited Rechauffeurs par immersion

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019129A1 (fr) * 1994-01-13 1995-07-20 Strix Limited Appareil de chauffage de l'eau
GB2301226A (en) * 1994-01-13 1996-11-27 Strix Ltd Water heating apparatus
GB2301226B (en) * 1994-01-13 1998-04-22 Strix Ltd Control units for water heating apparatus
GB2306284A (en) * 1995-07-19 1997-04-30 Otter Controls Ltd Electric heating elements
US8601638B2 (en) 2005-12-09 2013-12-10 Lg Electronics Inc. Steam generator, method of controlling the same, cleaner using the same and method of controlling the cleaner
US7917991B2 (en) 2005-12-09 2011-04-05 Lg Electronics Inc. Steam generator, method of controlling the same, cleaner using the same and method of controlling the cleaner
EP1795109A3 (fr) * 2005-12-09 2008-04-02 LG Electronics Inc. Générateur de vapeur pour un aspirateur, procédé pour commander un tel générateur, aspirateur comportant un tel générateur de vapeur et procédé de commande d'un tel aspirateur
WO2008096915A1 (fr) 2007-02-06 2008-08-14 Lg Electronics Inc. Appareil de chauffage, et générateur de vapeur et appareil ménager utilisant un appareil de chauffage et un générateur de vapeur
EP2118357A4 (fr) * 2007-02-06 2011-03-16 Lg Electronics Inc Appareil de chauffage, et générateur de vapeur et appareil ménager utilisant un appareil de chauffage et un générateur de vapeur
US8351769B2 (en) 2007-02-06 2013-01-08 Lg Electronics Inc. Heating apparatus, and steam generator and home appliance using the same
ITTO20080694A1 (it) * 2008-09-23 2010-03-24 Indesit Co Spa Macchina di lavaggio, in particolare una lavatrice, una lavasciugatrice o una lavastoviglie provvista di un dispositivo di rilevazione della temperatura della resistenza elettrica di riscaldamento del liquido di lavaggio.
WO2010035080A1 (fr) * 2008-09-23 2010-04-01 Indesit Company S.P.A. Machine à laver, en particulier un lave-linge, un lave-linge / sèche-linge ou un lave-vaisselle, équipée d’un dispositif de détection de la température de la resistance électrique utilisée pour réchauffer le liquide de lavage
RU2480544C2 (ru) * 2008-09-23 2013-04-27 Индезит Компани С.П.А. Стиральная машина, в частности стиральная или стирально-сушильная машина для белья, или посудомоечная машина, способ определения погруженного или выступающего состояния электрического сопротивления, используемого в стиральной машине, способ удаления известковых отложений с электрического сопротивления
EP2543762A3 (fr) * 2008-09-23 2014-04-16 Indesit Company S.p.A. Machine a laver, en particulier pour le linge ou machine lavante/séchante ou lave vaisselle équipée d'un dispositif pour mesurer la température de la résistance électrique chauffante utilisée pour préchauffer le liquide de lavage
US8882346B2 (en) 2008-09-23 2014-11-11 Indesit Company S.P.A. Washing machine, in particular a laundry machine or washing/drying machine or a dishwasher, equipped with a device for detecting the temperature of the electric resistance used for warming up the wash liquid
EP3133199A1 (fr) 2008-09-23 2017-02-22 Whirlpool EMEA S.p.A Procédé d'élimination de dépôts calcaires dans une résistance électrique

Also Published As

Publication number Publication date
ITMI930942A0 (it) 1993-05-11
IT1264405B1 (it) 1996-09-23
ITMI930942A1 (it) 1994-11-11
EP0624998B1 (fr) 1999-01-13
ES2127345T3 (es) 1999-04-16
DE69415860T2 (de) 1999-07-29
DE69415860D1 (de) 1999-02-25

Similar Documents

Publication Publication Date Title
CA1102858A (fr) Traduction non-disponible
CA1066752A (fr) Plaque chauffante electrique
JPH06507266A (ja) 投げ込みヒータ
US5951897A (en) Temperature measuring device for a regulating circuit of an electrical radiant heating appliance
US4394646A (en) Temperature indicator for a glass ceramic cooking surface
US4580123A (en) Thermal protective switch
WO1997012182A1 (fr) Ensemble element de chauffe
EP0624998B1 (fr) Dispositif de sécurité pour éléments de chauffage dans les appareils domestiques où la température est régulée
US3585359A (en) Electric heating elements
JP3247325B2 (ja) サーマルリレー及びこれを用いた制御回路
AU2011201313A1 (en) Surface mount thermostat
CN219413602U (zh) 一种温控水开关
US3413440A (en) Thermal responsive assembly, particularly for electric heaters
US3135860A (en) Built-in thermostatic controls for immersion heating elements
US3842232A (en) Oven temperature limiter
JPH0625737U (ja) 温度センサ
ES293327U (es) Dispositivo de bloqueo del portillo de una maquina lavadora
CN1199498A (zh) 对液体加热容器的温度控制器的改进
RU2097823C1 (ru) Регулятор температуры
CA1039337A (fr) Minuterie thermique
JPH0152003B2 (fr)
GB2218605A (en) Control means for an electric heater unit for an electric ceramic hob
NL8601390A (nl) Electrische verwarmingsinrichting.
CN2248922Y (zh) 带手动复位的电热管过热保护器
EP0277551A2 (fr) Résistance blindée avec thermostat

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19950321

17Q First examination report despatched

Effective date: 19970304

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 69415860

Country of ref document: DE

Date of ref document: 19990225

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2127345

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040416

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040517

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040520

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040521

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050502

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050504

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060131

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050504