EP0012312A1 - Dispositif commutateur thermostatique de régulation ou de limitation de courant pour appareils électriques, en particulier pour appareils chauffés électriquement - Google Patents

Dispositif commutateur thermostatique de régulation ou de limitation de courant pour appareils électriques, en particulier pour appareils chauffés électriquement Download PDF

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Publication number
EP0012312A1
EP0012312A1 EP79104843A EP79104843A EP0012312A1 EP 0012312 A1 EP0012312 A1 EP 0012312A1 EP 79104843 A EP79104843 A EP 79104843A EP 79104843 A EP79104843 A EP 79104843A EP 0012312 A1 EP0012312 A1 EP 0012312A1
Authority
EP
European Patent Office
Prior art keywords
temperature
switching element
element according
strip
sensitive
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.)
Withdrawn
Application number
EP79104843A
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German (de)
English (en)
Inventor
Ante Lujic
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.)
Eaton GmbH and Co KG
Original Assignee
Eaton GmbH and Co KG
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 Eaton GmbH and Co KG filed Critical Eaton GmbH and Co KG
Publication of EP0012312A1 publication Critical patent/EP0012312A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a temperature-dependent electrical current control or limiting switching element for electrical devices, in particular electrically heated devices, with a contact pair which can be automatically switched by a temperature-sensitive switching device as a function of a predetermined target temperature.
  • an electrical current control switching element which interrupts the power supply to the electrical heating resistors when the desired temperature is reached and which interrupts the heating resistor would automatically reconnect to the power source and the temperature has dropped to a predetermined value.
  • the temperature is thus kept at a predetermined value by means of a two-point control within a certain tolerance range.
  • the current control switching elements often also act as current limiting switching elements, which means that when the current increases excessively, as can occur, for example, when parts of a heating resistor are short-circuited, an automatic shutdown takes place.
  • the object of the invention is therefore to provide a temperature-dependent current control or limiting switching element which, with a compact and simple construction, additionally contains a safety release in the event of failure of the temperature-sensitive switching device and which is characterized by a cheap possibility of production.
  • the aforementioned temperature-dependent current control or limiting switching element is characterized in that the pair of contacts with its temperature-sensitive switching device and an electrically connected thermal trigger are combined to form a single structural unit which has connection elements for electrical lines and one Mechanical fastening device is provided and that the trigger is set to a triggering limit temperature which is higher than the target temperature of the temperature-sensitive switching device.
  • Characterized in that the thermal release combines directly with the switching device assigned to the current control or limiting function to form a structural unit is a uniform device that can be designed so that its space requirement is only slightly larger than that of the actual current control or limiting switching element, while at the same time ensuring high operational reliability.
  • the temperature-sensitive switching device can be formed by a directly or indirectly heated bimetal strip, while on the other hand the thermal release can also have a directly or indirectly heated bimetal strip.
  • At least one of the bimetallic strips can be designed with a snap action, while the other bimetallic strip, for example that of the thermal release, can often have a response delay time.
  • the current control and limiting element with its bimetallic strips matched to two different switching temperatures can of course not only be used when the safety function described is important; it can also be used whenever a switching operation is to be carried out at two different temperatures.
  • the thermal release can be designed such that it has a fusible link.
  • This can be molded directly onto a holding part carrying the fixed contact, thus reducing the space requirement to a minimum.
  • the fusible link can be arranged on an electrically conductive metal strip held at the end, while the holding part is a tongue held on the end between the bimetallic strip of the temperature-sensitive switching device carrying the movable contact and the metal strip on which the fixed contact sits.
  • the tongue carrying the fixed contact is held at the end in a heat-resistant, electrically insulating and provided with the mechanical fastening device, on which the bimetal strip of the temperature-sensitive switching device and the bimetal strip or the metal strip of the thermal release are spaced apart from one another are attached to each other and projecting over the fitting on the side of the tongue.
  • the temperature-dependent electrical current control or limiting switching element shown in the figures in two embodiments is designed in the form of a bimetal thermostat and is intended for electrical devices, for example electrical household coffee machines, heating pads, water heaters and the like. to name just a few.
  • the switching element has a block-like shaped piece 1, which is made of a heat-resistant, electrically insulating material, for example steatite or a corresponding plastic material, and which is formed with parallel, mutually opposite side surfaces.
  • a thin metal tongue 3 projecting on one end is held in the region of an end face 2 and carries a fixed contact 4 in the region of its free end.
  • a bimetallic strip 5 is fastened to the shaped piece 1, which bears a movable contact 6 at one end and rests in the region of its other end, at 7, on a side face of the shaped piece 1 which is essentially parallel to the metal tongue 3.
  • an electrically conductive connecting tab 8 is conductively connected, which is used to connect electrical lines, not shown.
  • the fitting 1 is provided with a fastening device in the form of a laterally projecting fastening lug 9 embedded in the fitting 1.
  • the fastening tab 9 can also be formed in one piece with the connecting tab 8 if this is possible for electrical reasons during installation.
  • the bimetallic strip 5 forms a temperature-sensitive electrical switching device which, when a certain target temperature is reached, to which the bimetallic strip 5 is designed, the contacts 4, 6 separates from one another by the bimetallic strip 5 passing into the position shown in dashed lines in FIGS. 1 and 3. As soon as the temperature has dropped below a predetermined value, the bimetallic strip 5 deforms in such a way that the two contacts 4 and 6 are closed again.
  • a thermal trigger is connected, aer is combined with the bimetallic strip 5, the contacts 4, 6 and the tongue 3 and the fitting 1 to form a single structural unit.
  • the thermal release consists of a second bimetallic strip 10, which is attached at one end to the molded part 1 on the side wall 11 opposite the side 7 of the molded part 1.
  • the second bimetal strip 10 carries at its other end a movable contact 12 which interacts with the fixed contact 4 from the other side like the movable contact 6.
  • the bimetallic strip 10 of the thermal release is set to a limit triggering temperature which is higher than the switching temperature of the bimetallic strip 5. It is also connected to a metallic stop tab 13 in an electrically conductive manner.
  • the two bimetallic strips 5, 10 can be designed so that they both switch under snap action, but the arrangement can also be such be taken that one of the bimetallic strips 5, 10, for example the bimetallic strip 10 assigned to the thermal release, is designed to switch with a certain delay in claims.
  • the bimetallic strips 5, 10 can be heated directly, so that they respond directly to the heat generated, for example, by heating resistors of the associated device.
  • the bimetallic strips 5, 10 can also be made sensitive to current, which means that when an overcurrent condition occurs, the heat generated in the bimetallic strip itself or in the auxiliary resistors which are in heat exchange with the bimetallic strip for actuating the switch contacts 6, 4 or 12, 4 leads.
  • switching element according to FIGS. 1, 2 can also be used for applications in which it is important to trigger switching contacts in succession at two different temperatures.
  • the thermal release is provided with a fusible link 14, which is arranged on the end of a conductive, tongue-like metal strip 15.
  • the metal strip 15 corresponds to the second bimetal strip 10 of the embodiment according to FIGS. 1, 2 on the side surface 11 of the mold Piece 1 attached so that the fixed contact 4 carrying metal tongue 3 is between the bimetallic strip 5 and the metal strip 15.
  • the fusible link 14 acts like a fuse; it is set to a certain limit temperature at which it melts so that the circuit is interrupted. As can be seen from FIG. 3, the fusible link 14 is molded directly onto the metal tongue 3 carrying the fixed contact 4.
  • the metal strip 15 is designed to be resilient and is pretensioned into the position shown in broken lines in FIG. 3. When the fusible link 14 melts, the metal strip 15 will therefore quickly change to the position shown in dashed lines under spring action, with the result that the circuit is immediately interrupted.
  • the metal tongue 3 and the bimetallic strip 5 as well as the bimetallic strip 10 or the metal strip 15 each lie on the same side of the molded piece 1, whereby they are arranged projecting in front of this. In principle, other arrangements would also be conceivable, which is also pointed out for the sake of order. However, the arrangement shown results in a particularly compact, simple and reliable construction.
  • the tongue 3 can also be designed to be resilient in order to achieve better switching conditions.
EP79104843A 1978-12-13 1979-12-03 Dispositif commutateur thermostatique de régulation ou de limitation de courant pour appareils électriques, en particulier pour appareils chauffés électriquement Withdrawn EP0012312A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782853776 DE2853776A1 (de) 1978-12-13 1978-12-13 Temperaturabhaengiges elektrisches stromregel- oder -begrenzungsschaltelement fuer elektrische geraete, insbesondere elektrisch beheizte geraete
DE2853776 1978-12-13

Publications (1)

Publication Number Publication Date
EP0012312A1 true EP0012312A1 (fr) 1980-06-25

Family

ID=6057038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104843A Withdrawn EP0012312A1 (fr) 1978-12-13 1979-12-03 Dispositif commutateur thermostatique de régulation ou de limitation de courant pour appareils électriques, en particulier pour appareils chauffés électriquement

Country Status (5)

Country Link
US (1) US4319126A (fr)
EP (1) EP0012312A1 (fr)
CA (1) CA1143416A (fr)
DE (1) DE2853776A1 (fr)
ES (1) ES486819A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081290A1 (fr) * 1981-12-09 1983-06-15 Texas Instruments Incorporated Disjoncteur à sécurité intrinsèque
EP0306544A1 (fr) * 1986-05-15 1989-03-15 Tobu Electric Co., Ltd. Dispositif de protection
FR2622348A1 (fr) * 1987-10-19 1989-04-28 Thermostat & Schaltgeraetebau Dispositif de commutation electrique a commande thermique, comprenant un regulateur et un limiteur de temperature

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415796A (en) * 1981-05-04 1983-11-15 General Electric Company Electric iron with unitary thermostat and overtemperature control assembly
US4433231A (en) * 1981-05-04 1984-02-21 General Electric Company Electric iron having stacked thermostat assembly with integral overtemperature protection control
DE3222542A1 (de) * 1982-06-16 1983-12-22 ABC-Elektrogeräte Volz, GmbH & Co, 7312 Kirchheim Topf zum erhitzen von fluessigkeiten
US4512295A (en) * 1982-12-17 1985-04-23 Thermo King Corporation Diesel glow plug tip enlargement protection
US4472705A (en) * 1983-01-03 1984-09-18 Elmwood Sensors, Inc. Thermostatic switch with thermal override
US4533896A (en) * 1983-11-28 1985-08-06 Northern Telecom Limited Fuse for thick film device
JP2646237B2 (ja) * 1988-05-02 1997-08-27 日本テキサス・インスツルメンツ株式会社 スイッチ装置
JPH05282977A (ja) * 1992-03-30 1993-10-29 Texas Instr Japan Ltd 過電流保護装置
JP3756700B2 (ja) * 1999-07-22 2006-03-15 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
DE10052220A1 (de) * 2000-10-21 2002-05-29 Bosch Gmbh Robert Überlastschutz für elektrische Maschinen
US20050205281A1 (en) * 2004-03-17 2005-09-22 Bachinski Thomas J Connection system for fireproofed electronic device
US7209336B2 (en) * 2004-10-02 2007-04-24 Tsung-Mou Yu Double-protection circuit protector
US7345569B2 (en) * 2005-05-03 2008-03-18 Tsung-Mou Yu Temperature sensitive protection device for circuits
US7345568B2 (en) * 2005-05-03 2008-03-18 Tsung-Mou Yu Dual protection device for circuits
WO2009095961A1 (fr) * 2008-01-28 2009-08-06 Uchiya Thermostat Co., Ltd. Dispositif thermique de protection
DE112008003792B4 (de) * 2008-04-10 2022-08-04 Uchlya Thermostat Co., Ltd. Temperaturschalter
US7737816B1 (en) * 2008-11-25 2010-06-15 Tsung Mou Yu Dual protection device for circuit
US7808361B1 (en) * 2008-11-25 2010-10-05 Tsung Mou Yu Dual protection device for circuit
US7750788B2 (en) * 2008-12-09 2010-07-06 Tsung Mou Yu Dual protection device for circuit
US7791448B2 (en) * 2008-12-12 2010-09-07 Tsung Mou Yu Dual protection device for circuit
TW201318020A (zh) * 2011-10-28 2013-05-01 Thermokey Electric Ind Corp 溫度開關
CN105716225B (zh) * 2014-12-22 2020-08-11 株式会社堀场Stec 流体加热器、加热块和汽化系统
KR102176851B1 (ko) * 2016-12-28 2020-11-10 주식회사 엘지화학 재사용 가능 퓨즈

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH103324A (de) * 1922-12-30 1924-02-01 W Schaufelberger & Co Dr Sicherheitsvorrichtung gegen Überhitzung für elektrisch geheizte Wärmstücke.
US2790046A (en) * 1955-02-23 1957-04-23 Douglas W Richardson Temperature responsive switch device
FR1146253A (fr) * 1956-03-23 1957-11-08 Cfcmug Dispositif thermostatique
DE2149367A1 (de) * 1970-10-24 1972-04-27 Philips Nv Temperaturabhaengige Schaltvorrichtung
FR2239751A1 (en) * 1973-08-04 1975-02-28 Thermostat & Schaltgeraetebau Combined thermostat and temperature fuse - is for deep-fryers when rapid interruption is needed on breakdown
FR2328273A1 (fr) * 1975-10-16 1977-05-13 Inter Control Kohler Elekt Gmb Combinaison regulateur de temperature-thermostat de securite
DE2611169A1 (de) * 1976-03-17 1977-09-22 Wickmann Werke Ag Ueberhitzungs-schutzschalter fuer elektrogeraete

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US888381A (en) * 1907-09-18 1908-05-19 Gen Electric Electric heating device.
GB147354A (en) * 1919-07-23 1920-07-22 Relay Automatic Telephone Co Improvements in thermostatic devices
US2255021A (en) * 1939-03-22 1941-09-02 Detroit Lubricator Co Control device
US2366387A (en) * 1941-06-24 1945-01-02 Crise Electric Mfg Company Modulating condition responsive switch
GB687258A (en) * 1951-10-18 1953-02-11 Rheostatic Co Ltd Improvements in safety switches for electrically heated appliances
US2786171A (en) * 1953-07-15 1957-03-19 Gen Motors Corp Starting and overload control for split-phase electric motor
US3047771A (en) * 1958-11-20 1962-07-31 Harry C Clark Safety headlight switch
US3611235A (en) * 1970-07-01 1971-10-05 American Thermostat Corp Thermostat with built-in circuit breaker
US3733571A (en) * 1971-12-27 1973-05-15 Gen Electric Switch control
US3835294A (en) * 1973-04-06 1974-09-10 Binks Mfg Co High pressure electric fluid heater
US3958197A (en) * 1975-01-24 1976-05-18 I-T-E Imperial Corporation High interrupting capacity ground fault circuit breaker
US4100397A (en) * 1976-07-08 1978-07-11 The Gillette Company Thermostatically controlled electrical heater assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH103324A (de) * 1922-12-30 1924-02-01 W Schaufelberger & Co Dr Sicherheitsvorrichtung gegen Überhitzung für elektrisch geheizte Wärmstücke.
US2790046A (en) * 1955-02-23 1957-04-23 Douglas W Richardson Temperature responsive switch device
FR1146253A (fr) * 1956-03-23 1957-11-08 Cfcmug Dispositif thermostatique
DE2149367A1 (de) * 1970-10-24 1972-04-27 Philips Nv Temperaturabhaengige Schaltvorrichtung
FR2239751A1 (en) * 1973-08-04 1975-02-28 Thermostat & Schaltgeraetebau Combined thermostat and temperature fuse - is for deep-fryers when rapid interruption is needed on breakdown
FR2328273A1 (fr) * 1975-10-16 1977-05-13 Inter Control Kohler Elekt Gmb Combinaison regulateur de temperature-thermostat de securite
DE2611169A1 (de) * 1976-03-17 1977-09-22 Wickmann Werke Ag Ueberhitzungs-schutzschalter fuer elektrogeraete

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081290A1 (fr) * 1981-12-09 1983-06-15 Texas Instruments Incorporated Disjoncteur à sécurité intrinsèque
EP0306544A1 (fr) * 1986-05-15 1989-03-15 Tobu Electric Co., Ltd. Dispositif de protection
FR2622348A1 (fr) * 1987-10-19 1989-04-28 Thermostat & Schaltgeraetebau Dispositif de commutation electrique a commande thermique, comprenant un regulateur et un limiteur de temperature

Also Published As

Publication number Publication date
ES486819A1 (es) 1980-06-16
US4319126A (en) 1982-03-09
CA1143416A (fr) 1983-03-22
DE2853776A1 (de) 1980-06-26

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

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Inventor name: LUJIC, ANTE