EP3341519B1 - Elektrisches haushaltsgerät umfassend eine über einen thermostat mit einem thermischen regelkreis versorgte, beheizte platte - Google Patents

Elektrisches haushaltsgerät umfassend eine über einen thermostat mit einem thermischen regelkreis versorgte, beheizte platte Download PDF

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Publication number
EP3341519B1
EP3341519B1 EP16775270.8A EP16775270A EP3341519B1 EP 3341519 B1 EP3341519 B1 EP 3341519B1 EP 16775270 A EP16775270 A EP 16775270A EP 3341519 B1 EP3341519 B1 EP 3341519B1
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EP
European Patent Office
Prior art keywords
switch
contact
transmission member
thermostat
fuse
Prior art date
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Active
Application number
EP16775270.8A
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English (en)
French (fr)
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EP3341519A1 (de
Inventor
Cédric Nivon
Lemnouer DEBBAH
Romaric SAGE
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.)
SEB SA
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SEB SA
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Publication date
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Publication of EP3341519A1 publication Critical patent/EP3341519A1/de
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Publication of EP3341519B1 publication Critical patent/EP3341519B1/de
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Classifications

    • 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
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/26—Temperature control or indicating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/002—Thermally-actuated switches combined with protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/764—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
    • 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
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0255—Irons

Definitions

  • the present invention relates to an appliance, such as an iron, comprising a heating plate electrically powered by a supply circuit comprising a thermostat equipped with a thermal cut-out, and relates more particularly to an apparatus in which the thermal circuit breaker comprises a switch held in closed position by a transmission member in contact with the switch and with a fuse plug contained in a cavity of the heating plate, and wherein the transmission member opposes the opening of the switch under the effect of return means.
  • the thermal circuit breaker is constituted by a switch held in closed position by a transmission rod in contact with the switch and with a fuse plug contained in a cavity of the heating plate, the transmission member s' opposing the opening of the switch under the spring effect of the contact blade of the switch.
  • Such a device has the advantage of having a thermostat directly integrating a circuit breaker device, to reduce the mounting operations and therefore the cost of manufacturing the device.
  • the circuit breaker integrated in the thermostat greatly improves the safety of use of the device because it avoids excessive heating of the heating plate of the iron, and therefore the risk of causing a fire, in case of failure of the thermostat .
  • the temperature of the soleplate increases until it reaches the melting temperature of the fusible plug contained in the cavity of the heating plate.
  • this temperature is the transmission rod is immersed in the melt under the effect of the pressure exerted by the spring effect of the contact blade, which causes the opening of the switch.
  • the circuit breaker could be rendered inoperative by the presence of burrs in the cavity which prevented the transmission rod from plunging into the cavity despite the fusion of the plug. Such burrs can indeed be generated during the process of making the cavity in the heating plate.
  • an object of the present invention is to provide an appliance remedying these disadvantages.
  • an object of the present invention is to provide an appliance comprising a thermostat equipped with an improved circuit breaker device, ensuring greater safety of use to the device.
  • the subject of the invention is an appliance comprising a heating plate electrically powered by a supply circuit comprising a thermostat equipped with a thermal cut-out, the thermal circuit breaker comprising a switch held in the closed position by a transmission member in contact with the switch and with a fuse plug contained in a cavity of the heating plate, the transmission member opposing the opening of the switch under the effect of return means, characterized in that the transmission member comprises at least one fusible element whose fusion generates the opening of the switch under the effect of the return means.
  • Such a device has the advantage of having two fusible components acting on the same circuit breaker switch, thereby improving the safety of the device, the second fuse component acting in the event of a faulty opening of the cut switch -circuit during the melting of the first fuse component.
  • the integration of the second fuse component directly into the transmission member keeps a compact construction thermostat whose mounting on the heating plate remains similar to mounting the thermostat as described in the document FR 2 656 952 .
  • the transmission member extends in length between a lower end in contact with the fuse plug and an upper end in contact with the switch, the melting of the fuse element causing a reduction in the length of the transmission member.
  • Such a transmission member has the advantage of being simple and economical to achieve and ensure the opening of the circuit breaker switch during the melting of the fuse element.
  • the fuse element is disposed near the upper end of the transmission member.
  • the transmission member comprises a rod coming into contact with the fuse plug and a head coming into contact with the switch, the fuse element being interposed between the rod and the head.
  • the transmission member comprises guide means ensuring a translation guide between the head and the rod during the melting of the fuse element.
  • Such a characteristic allows a better holding of the transmission member in particular when mounting the thermostat on the heating plate.
  • the switch comprises a flexible contact blade made of spring material, the contact blade constituting the return means of the switch in the open position, the upper end of the transmission member bearing against the flexible contact blade.
  • the fuse element is made of a fusible material having a different melting temperature from that of the fusible plug.
  • the fuse element is made of a material having a melting point less than or equal to 300 ° C.
  • Such a characteristic makes it possible to take into account the thermal losses occurring in the transmission member in order to have a fusion of the fuse element occurring shortly after the melting of the fusible plug, when the fusion of the latter does not occur. allowed to interrupt the power supply of the hotplate.
  • the thermostat comprises a body to which are attached contact blades of the thermostat, the latter extending laterally to the body, the switch having two contact blades independent of the contact blades of the thermostat, the contact blades of the switch being also connected to the body.
  • the apparatus is an iron with an ironing sole in thermal contact with the heating plate.
  • the figure 1 represents a heating subassembly equipping an iron, this subassembly comprising an iron soleplate 1 surmounted by a heating plate 2, preferably consisting of an aluminum foundry, in which is embedded an electrical resistance.
  • the heating plate resistor 2 is electrically powered by a supply circuit comprising a thermostat 3 which provides thermal regulation of the soleplate 1 around a set temperature, the thermostat 3 being fixed directly on the heating plate 2.
  • the thermostat 3 comprises, in a manner known per se, a cylindrical body of axis XX 'traversed axially by a rivet 30, the body comprising a series of superposed spacers 31, 32, 33, 34 between which are inserted blades 4, 5 constituting the regulation system of the thermostat 3.
  • the body supports an upper plate 35 which carries a screw 36 whose lower end rests on a flexible blade 4 fixed to the body. At the end 6b of this flexible blade 4 is welded a second blade 6. The indentations in the blades 4 and 6 allow the free passage of a leaf spring 4a.
  • the set of blades 4, 4a, 6 constitutes a movable assembly with unstable equilibrium.
  • the thermostat 3 further comprises a rigid blade 5 integral with the body of the thermostat 1. Each of the blades 5 and 6 has contacts 5a and 6a.
  • a bimetallic blade 37 is fixed to the base of the body of the thermostat 3, it is mechanically coupled to the blade 6 by an insulating rod 38.
  • the bending of the bimetallic blade 37 causes, in a manner known per se, the displacement of the end 6b of the blade 6, which has the consequence of causing the abrupt separation of the contacts 5a. and 6a respectively carried by the blades 5 and 6.
  • the power supply of the electrical resistance of the sole 2 is then cut off.
  • the user By acting on the screw 36, the user can change the position of the fulcrum on the flexible blade 4, and thereby change the trigger temperature of the thermostat 3.
  • the rigid blade 5 also has an electrical connection pad 5b forming an angle of the order of 45 ° with the portion of the blade 5 carrying the contact 5a.
  • the thermostat 3 also incorporates a thermal cut-out device comprising a switch 7 comprising a flexible contact blade 71, with spring effect, in electrical connection with the flexible blade 4 and a rigid contact blade 72 provided with a connection portion 72B , the flexible contact blade 71 being disposed below the rigid contact blade 72 and carrying a contact 71A which bears against a contact 72A of the rigid contact blade 72.
  • the switch 7 is kept in the closed position by a transmission member 8 standing vertically on a fuse plug 22 housed in a cavity 21 formed in the heating plate 2, this fuse plug 22 being made of an alloy capable of melting at a temperature of the order of 390 ° C, at which it is desired to cut off the power supply of the resistor 20 of the heating plate 2 in the event of failure of the regulation system of the thermostat 3.
  • the transmission member 8 comprises a metal rod 81 having a lower end in contact with the fuse plug 22 and comprises a ceramic head 82 having an upper end in contact with the flexible contact blade 71 of the switch 7, the blade contact member 71 bearing on the head 82 in the manner of a spring to push the rod 81 on the fuse plug 22.
  • the body of the thermostat 3 comprises a bottom plate 39 which extends laterally above the cavity 21 and which includes an orifice crossed by the rod 81, providing transverse guidance of the rod 81 above the fuse plug 22.
  • the transmission member 8 also comprises a fuse element 83 which is advantageously interposed between the head 82 and the rod 81, the fuse element 83 being made of an alloy capable of melting when the temperature of the The heating plate 2 reaches a temperature higher than the melting temperature of the fusible plug 22, for example when the temperature of the heating plate 2 is greater than 400 ° C.
  • the fuse element 83 will advantageously have a temperature of melting below 300 ° C.
  • the fuse element 83 has a lower end bearing on an upper end of the rod 81 and has an upper end which is engaged in a cavity of the head 82, the head 82 having a peripheral skirt extending around of the fuse element 83.
  • the peripheral skirt advantageously comprises a lower end provided with a central opening 82A in which is engaged the upper end of the rod 81, this central opening 82A having a diameter adapted to the diameter of the rod 81 so that the head 82 can slide on the upper end of the rod 81 being guided along the longitudinal axis of the latter during the melting of the fuse element 83.
  • the peripheral skirt also comprises two oblong openings 82B vertical, also visible on the figure 1 , disposed opposite and in which is engaged a transverse axis 84 integral with the rod 81, this axis 84 defining a longitudinal travel stroke of the head 82 on the end of the rod 81 during the merger of the fuse element 83.
  • the rod 81 of the transmission member then plunges into the molten material and goes down into the cavity 21. Due to the descent of the rod 81, the contact blade 71 bends downwards from its spring effect, and its contact 71A deviates from the contact 72A of the other contact blade 72.
  • the power supply of the heating resistor contained in the heating plate 2 is then cut off.
  • the temperature of the heating plate 2 then continues to increase until the heat transmitted through the rod 81 leads the fuse element 83 of the transmission member 8 to also reach its melting temperature.
  • the melting of the fusible plug 22 causes the head 82 to descend down the rod 81 over a course of several millimeters, so that the length of the transmission member 8 is reduced, which causes the descent of the contact blade 71 downwards, in particular under the influence of its spring effect, and its contact 71a deviates from the contact 72a of the other contact blade 72.
  • the power supply of the heating resistor contained in the heating plate 2 is then cut off and it is no longer likely to be heated further, thereby eliminating a risk of fire.
  • the apparatus thus produced thus has the advantage of providing improved security thanks to the presence of two fusible devices arranged in series which cooperate with the same circuit breaker switch, the presence of the second fuse device for mitigating a failure opening of the circuit breaker switch following a blockage of the lower end of the rod in the cavity of the heating plate.
  • the integration of the second fuse device in the transmission member makes it possible to maintain a thermostat equipped with a circuit breaker which remains compact, of simple construction and which can be mounted in a single operation on the hotplate of the iron to redo.
  • the invention can be applied to any household appliance provided with a heating plate whose temperature is regulated by means of a thermostat and not only in the field of irons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Textile Engineering (AREA)
  • Cookers (AREA)
  • Thermally Actuated Switches (AREA)
  • Irons (AREA)
  • Fuses (AREA)
  • Control Of Resistance Heating (AREA)

Claims (10)

  1. Elektrisches Haushaltsgerät, umfassend eine Heizplatte (2), die durch einen Versorgungskreis elektrisch gespeist wird, der einen Thermostat (3) umfasst, der mit einer Wärmeabschaltung ausgestattet ist, wobei die Wärmeabschaltung einen Schalter (7) aufweist, der in geschlossener Stellung durch ein Übertragungsorgan (8) in Kontakt mit dem Schalter (7) und mit einem schmelzbaren Verschluss (22) gehalten wird, der in einem Hohlraum (21) der Heizplatte (2) enthalten ist, wobei das Übertragungsorgan (8) dem Öffnen des Schalters (7) unter der Wirkung von Mitteln zur Rückstellung (71) entgegenwirkt, dadurch gekennzeichnet, dass das Übertragungsorgan (8) mindestens ein schmelzbares Element (83) aufweist, dessen Schmelzen das Öffnen des Schalters (7) unter der Wirkung von Mitteln zur Rückstellung (71) bewirkt.
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, dass das Übertragungsorgan (8) sich in der Länge zwischen einem unteren Ende in Kontakt mit dem schmelzbaren Verschluss (22) und einem oberen Ende in Kontakt mit dem Schalter (7) erstreckt, und dass das schmelzbare Element (83) eine Verringerung der Länge des Übertragungsorgans (8) bewirkt.
  3. Gerät nach Anspruch 2, dadurch gekennzeichnet, dass das schmelzbare Element (83) nahe dem oberen Ende des Übertragungsorgans (8) angeordnet ist.
  4. Gerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Übertragungsorgan (8) eine Stange (81), die mit dem schmelzbaren Verschluss (22) in Kontakt kommt, und einen Kopf (82) aufweist, der mit dem Schalter (7) in Kontakt kommt, und dass das schmelzbare Element (83) zwischen der Stange (81) und dem Kopf (82) angeordnet ist.
  5. Gerät nach Anspruch 4, dadurch gekennzeichnet, dass das Übertragungsorgan (8) Führungsmittel (82B, 84) aufweist, die eine Translationsführung zwischen dem Kopf (82) und der Stange (81) während des Schmelzens des schmelzbaren Elements (83) sicherstellen.
  6. Gerät nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass der Schalter (7) eine flexible Kontaktklinge (71) umfasst, die aus einem Material mit Federeffekt hergestellt ist, wobei die Kontaktklinge (71) die Mittel zur Rückstellung des Schalters (7) in die offene Position bildet, und dass das obere Ende des Übertragungsorgans (8) an der flexiblen Kontaktklinge (71) anliegt.
  7. Gerät nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das schmelzbare Element (83) aus einem schmelzbaren Material besteht, das eine Schmelztemperatur aufweist, die sich von derjenigen des schmelzbaren Verschlusses (22) unterscheidet.
  8. Gerät nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das schmelzbare Element (83) aus einem Material hergestellt ist, das eine Schmelztemperatur von 300 °C oder darunter aufweist.
  9. Gerät nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Thermostat (3) einen Körper aufweist, an dem Kontaktklingen (4, 5, 6) des Thermostats angebracht sind, wobei sich diese seitlich an dem Körper erstrecken, und dass der Schalter (7) zwei Kontaktklingen (71, 72) unabhängig von den Kontaktklingen (4, 5, 6) des Thermostats (3) aufweist, wobei die Kontaktklingen (71, 72) des Schalters (7) ebenfalls mit dem Körper verbunden sind.
  10. Gerät nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Gerät ein Bügeleisen ist, das eine Bügelsohle (1) aufweist, die in thermischem Kontakt mit der Heizplatte (2) steht.
EP16775270.8A 2015-08-28 2016-08-26 Elektrisches haushaltsgerät umfassend eine über einen thermostat mit einem thermischen regelkreis versorgte, beheizte platte Active EP3341519B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1558030A FR3040403B1 (fr) 2015-08-28 2015-08-28 Appareil electromenager comportant une plaque chauffante alimentee par un thermostat equipe d'un coupe-circuit thermique
PCT/FR2016/052134 WO2017037371A1 (fr) 2015-08-28 2016-08-26 Appareil electromenager comportant une plaque chauffante alimentee par un thermostat equipe d'un coupe-circuit thermique

Publications (2)

Publication Number Publication Date
EP3341519A1 EP3341519A1 (de) 2018-07-04
EP3341519B1 true EP3341519B1 (de) 2019-06-12

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EP16775270.8A Active EP3341519B1 (de) 2015-08-28 2016-08-26 Elektrisches haushaltsgerät umfassend eine über einen thermostat mit einem thermischen regelkreis versorgte, beheizte platte

Country Status (7)

Country Link
EP (1) EP3341519B1 (de)
JP (1) JP6818745B2 (de)
CN (1) CN107949673B (de)
ES (1) ES2734140T3 (de)
FR (1) FR3040403B1 (de)
TR (1) TR201910140T4 (de)
WO (1) WO2017037371A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108951062B (zh) * 2018-09-26 2020-09-11 浙江好学生服饰有限公司 一种基于局部过热检测和处理的服装熨烫装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE392534A (de) *
GB213712A (en) * 1923-01-23 1924-04-10 William Theodore Hoofnagle Improvements in electric flat irons
FR2656952B1 (fr) * 1990-01-05 1995-04-14 Seb Sa Coupe-circuit integre a un thermostat pour appareil electrique.
US6172335B1 (en) * 1999-08-27 2001-01-09 Orcon Corporation Carpet seaming iron with electronic temperature control
CN2417803Y (zh) * 2000-04-22 2001-02-07 杨宁恩 电热容器安全保护装置
ITGE20020031A1 (it) * 2002-04-19 2003-10-20 Cobra Srl Termostato provvisto di mezzi di regolazione e limitazione della temperatura.
CN203866613U (zh) * 2014-05-30 2014-10-08 浙江家泰电器制造有限公司 一种电熨斗温控器
CN203866612U (zh) * 2014-05-30 2014-10-08 浙江家泰电器制造有限公司 一种电熨斗温控器
CN203866611U (zh) * 2014-05-30 2014-10-08 浙江家泰电器制造有限公司 一种电熨斗温控器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2734140T3 (es) 2019-12-04
EP3341519A1 (de) 2018-07-04
FR3040403B1 (fr) 2017-08-11
JP2018527085A (ja) 2018-09-20
CN107949673A (zh) 2018-04-20
FR3040403A1 (fr) 2017-03-03
WO2017037371A1 (fr) 2017-03-09
JP6818745B2 (ja) 2021-01-20
TR201910140T4 (tr) 2019-07-22
CN107949673B (zh) 2020-07-17

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