EP0114071B1 - Dispositif de contrôle de température - Google Patents

Dispositif de contrôle de température Download PDF

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Publication number
EP0114071B1
EP0114071B1 EP84100348A EP84100348A EP0114071B1 EP 0114071 B1 EP0114071 B1 EP 0114071B1 EP 84100348 A EP84100348 A EP 84100348A EP 84100348 A EP84100348 A EP 84100348A EP 0114071 B1 EP0114071 B1 EP 0114071B1
Authority
EP
European Patent Office
Prior art keywords
ptc
resistor
connecting tongue
spring strip
thermostat according
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.)
Expired
Application number
EP84100348A
Other languages
German (de)
English (en)
Other versions
EP0114071A3 (en
EP0114071A2 (fr
Inventor
Hanno Roller
Roland Starck
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.)
Eichenauer Heizelemente GmbH and Co KG
Original Assignee
Fritz Eichenauer 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
Family has litigation
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Application filed by Fritz Eichenauer GmbH and Co KG filed Critical Fritz Eichenauer GmbH and Co KG
Publication of EP0114071A2 publication Critical patent/EP0114071A2/fr
Publication of EP0114071A3 publication Critical patent/EP0114071A3/de
Application granted granted Critical
Publication of EP0114071B1 publication Critical patent/EP0114071B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means

Definitions

  • the invention relates to a temperature monitor with a fixed contact provided with a first connecting tongue and a movable contact cooperating therewith, connected to the associated second connecting tongue, with a bimetallic element lifting the moving contact from the fixed contact and with one of the two contacts mentioned formed switch contact connected in parallel PTC resistor, which rests on one of the connecting tongues and is held there by elastic clamping.
  • a generic temperature monitor is known from DE-A-2 113388.
  • the known temperature monitor is used in a housing, a PTC element being arranged in the insertion region of the housing between the two connecting lugs.
  • the PTC element can be held by an inserted spring.
  • the movable contact can be lifted off the fixed contact by being connected to the connecting tongue associated with it via the bimetal element.
  • the housing and thus the PTC element are sealed with a sealing compound.
  • the PTC element serves to keep the switch open after it has been brought into the open state by an overtemperature or an overcurrent of the device protected by it, as long as the power supply has not been switched off externally.
  • PTC elements are sensitive elements and can easily break. This can occur during use, but also during manufacture. For this reason, efforts are made to connect the sensitive PTC stone to the device to be protected as late as possible. This should also be possible in a simple and convenient manner. Furthermore, when a radiator provided with a temperature monitor is transported from the manufacturer of the same to the processor, who installs it, for example, in a hair dryer or in another electrical device, the PTC element can be damaged. The entire temperature monitor that is spotted or riveted must then be removed and replaced.
  • the invention has for its object to further develop a generic temperature monitor so that it can be used in electric radiators, responds quickly and its resistance element is replaceable in a simple and convenient manner, but is still reliably held on the contact wire to which it is applied .
  • the above object is achieved with a temperature monitor of the type mentioned at the outset in that the PTC resistance against the first connecting tongue is pressed by a spring strip attached to the second connecting tongue and projecting from there below the first connecting tongue, which in which the PTC resistor has a convex shape facing the PTC resistor on the connection lug area.
  • the configuration according to the invention can be achieved in a simple and convenient manner that the PTC stone is introduced into the temperature monitor only late and in particular only after it has been connected to an electric radiator, which is done by dots or rivets, especially if this is done automatically, a PTC brick, if it had been used earlier, could easily be damaged.
  • the invention allows damaged PTC elements to be replaced relatively easily and conveniently when transporting radiators provided with temperature monitors from the manufacturer to the processor, who install them in an electrical device.
  • the supplier of the radiator can immediately deliver a certain number of PTC elements separately to replace damage that can never be excluded. This prevents such damaged radiators from being sent back and forth between processors and manufacturers by simply replacing the stone. The same can if necessary.
  • Figure 1 shows an embodiment of the temperature monitor according to the invention in side view
  • Figure 2 shows a section through the
  • the open temperature monitor 1 shown in FIG. 1 without a housing has connection cables 2 which are fixed to an insulating part 3 of the temperature monitor 1.
  • There is also a contact arrangement which consists of a strip-shaped bimetal element 5 which is electrically connected to and held by a connecting tongue 2 and at the end of which a button-like movable contact 5 'is attached.
  • the contact 5 ' is assigned a fixed contact 4 which is fastened to the other connecting tongue 2'.
  • a spring strip 7 is fastened to the connecting tongue 2 by being punctured onto the connecting tongue 2 with a bent end 8.
  • the spring strip 7 projects from there to below the connecting tongue 2 ', wherein it is under the spring action directed towards the connecting tongue 2'.
  • a PTC resistance tablet 6 is arranged between the tongue 2 'and the spring strip 7.
  • the spring strip 7 has a convex shape 12 facing the PTC element 6.
  • the PTC element is thus simply pressed flat against the tongue 2 'and held under the spring action of the spring strip 7.
  • the PTC element 6 can tilt around the convex shape 12 and adjust such that it lies flat and flat against the tongue 2 'over the entire surface and horizontally. On the one hand, this results in optimal heat extraction and, on the other hand, optimal electrical contacting, so that the function of the temperature monitor is optimally guaranteed. Nevertheless, the PTC element can be exchanged easily and conveniently.
  • the temperature monitor 1 is in the manner shown in FIG. 3 in series with a consumer 9, such as a heater or the like. switched. From the circuit diagram of FIG. 3 it can be seen that the PTC element 6 is connected in parallel to the contact arrangement, that is to say bridges it. If current is now applied, it flows from a connecting tongue, for example 2, via the bimetallic element 5, the movable contact 5 'attached to it, to the fixed contact 4 and from there to the connecting tongue 2' and from there to the consumer 9, which then, for example is heated.
  • the bimetallic element 5 of the temperature monitor 1 opens, which - as usual - is arranged in the vicinity of the consumer 9, the contact arrangement 4, 5 ', so it lifts the movable contact 5 'from the fixed contact 4.
  • the current flow through the contact arrangement is therefore interrupted.
  • the PTC resistor also has such a low conductivity that practically no current flows through it to the consumer 9. The consumer 9 is no longer burdened and the temperature in the consumer drops.
  • the conductivity in the PTC element 6 increases, as a result of which the latter heats itself up and stabilizes with a low current flow and this corresponding heating, the temperature being released to the surroundings, in particular in the exemplary embodiment shown to the fixed contact 4 and from it radiating onto the bimetallic element 5 is such that the contact arrangement 4, 5 'remains open.
  • the consumer can therefore not be overloaded. A significant release of heat from the consumer or radiator 9 is therefore not possible. Only after the consumer 9 has been switched off by hand also no more current flows through the PTC element 6, so that it cools down and the bimetallic element 5 closes the contact arrangement 4, 5 'and the consumer after a certain time, in particular after checking the source of the error can be used again.
  • the current flowing through the PTC element 6 when the contact arrangement is open can be selected in a suitable manner.
  • the PTC element 6 is only clamped between the connecting lug 2 'and the spring strip 7, it can, if necessary, for example when the device in which the temperature monitor 1 is used , Vibrations, be attached even more securely.
  • the PTC element 6 can additionally be secured against slipping by a shrink tube enveloping it and the parts contacting it or a housing made of plastic.
  • the same parts are present as far as they are, with the same reference symbols as bisker.
  • the spring strip 7 pressing the PTC element 6 against the exclusion tongue 2 ' has a convex shape 12 below the PTC element, which rests only on the PTC element 6 and with which the spring strip 7 presses the PTC element 6 against the Terminal tongue 2 'presses.
  • the spring strip 7 is also molded into a cup-shaped plastic part, the mass of the plastic part 13 following the pattern 12 on its concave side, while the convex side of the pattern 12 lies freely inside the part 13 .
  • the PTC element is set here, ie it is held in the lateral direction by the cup-shaped design of the plastic part 13.
  • the spring strip 7 is fixed with its connecting part 8 at 14 on the connecting tongue 2.
  • the plastic used for part 13 is Ryton.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Thermistors And Varistors (AREA)
  • Control Of Temperature (AREA)

Claims (7)

1. Contrôleur de température avec un contact fixe (4) muni d'une première languette de raccordement (2') et un contact mobile (5') qui coopère avec ledit contact fixe et est relié à la seconde languette de raccordement (3), avec un élément bimétallique (5) soulevant le contact mobile du contact fixe, et avec une résistance CPT (6) montée en parallèle avec un contact de commutation constitué par les deux contacts (4, 5') précités, laquelle est appliquée contre l'une des languettes de raccordement (2') et y est maintenue par un serrage élastique, caractérisé en ce que la résistance CPT (6) est poussée contre la première languette de raccordement (2') par une lame de ressort (7) qui est fixée sur la seconde languette de raccordement (2) d'où elle dépasse audessous de la,première languette de raccordement (2') et qui présente, dans la zone d'application de la résistance CPT (6) contre la languette de raccordement (2'), une courbure convexe (12) dirigée vers la résistance CPT (6).
2. Contrôleur de température selon la revendication 1, caractérisé en ce que la lame de ressort (7) est soudée par points, avec une extrémité repliée (8), sur une languette de raccordement (2 respectivement 2') .
3. Contrôleur de température selon l'une des revendications 1 ou 2, caractérisé en ce que la lame de ressort (7) est réalisée en acier à ressorts inoxydable.
4. Contrôleur de température selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une gaine rétrécissable (10) entoure une languette de raccordement (2 respectivement 2'), la résistance CPT (6) ainsi que l'une des extrémités de la lame de ressort (7).
5. Contrôleur de température selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la résistance CPT est bloquée latéralement au moyen d'un élément de matière plastique (13) en forme de pot.
6. Contrôleur de température selon la revendication 5, caractérisé en ce que l'élément en matière plastique (13) résiste à la chaleur.
7. Contrôleur de température selon l'une des revendications 5 ou 6, caractérisé en ce que le matériau de l'élément en matière plastique (13) suit la courbure (12) de la lame de ressort (7) sur le côté concave de celle-ci, tandis que le côté convexe de la courbure (12) est dégagé à l'intérieur de l'élément de retenue (13).
EP84100348A 1983-01-15 1984-01-14 Dispositif de contrôle de température Expired EP0114071B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8300960U DE8300960U1 (de) 1983-01-15 1983-01-15 Temperaturwächter
DE8300960U 1983-01-15

Publications (3)

Publication Number Publication Date
EP0114071A2 EP0114071A2 (fr) 1984-07-25
EP0114071A3 EP0114071A3 (en) 1984-08-15
EP0114071B1 true EP0114071B1 (fr) 1988-07-20

Family

ID=6748950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100348A Expired EP0114071B1 (fr) 1983-01-15 1984-01-14 Dispositif de contrôle de température

Country Status (5)

Country Link
US (1) US4580123A (fr)
EP (1) EP0114071B1 (fr)
DE (2) DE8300960U1 (fr)
ES (1) ES276817Y (fr)
WO (1) WO1986004453A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333620A1 (de) * 1983-09-17 1985-04-11 Braun Ag, 6000 Frankfurt Schutzschalter
DE3447237A1 (de) * 1984-12-22 1986-06-26 Braun Ag, 6000 Frankfurt Elektrische kaffeemaschine mit warmhalteplatte
DE3522546A1 (de) * 1985-06-24 1987-01-02 Bosch Siemens Hausgeraete Schaltungsanordnung in elektroherden zur heizleistungssteuerung
EP0226663A1 (fr) * 1985-11-08 1987-07-01 Texas Instruments Holland B.V. Thermostat
FR2612684A1 (fr) * 1987-03-16 1988-09-23 Degois Cie Ets Couverture chauffante perfectionnee
DE3710672C2 (de) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter mit einem Gehäuse
GB2252674B (en) * 1991-01-04 1995-01-04 Otter Controls Ltd Improvements relating to thermally responsive electric switches
US5262749A (en) * 1992-03-16 1993-11-16 Opti-Lume Industries, Inc. Electrical safety device
JPH05282977A (ja) * 1992-03-30 1993-10-29 Texas Instr Japan Ltd 過電流保護装置
DE4237546C2 (de) * 1992-11-06 2003-10-16 Behr Thermot Tronik Gmbh Elektrisches Schaltgerät
DE19727197C2 (de) * 1997-06-26 1999-10-21 Marcel Hofsaess Temperaturabhängiger Schalter mit Kontaktbrücke
DE19816807C2 (de) * 1998-04-16 2000-06-08 Thermik Geraetebau Gmbh Temperaturabhängiger Schalter
US5995350A (en) * 1998-06-24 1999-11-30 Kopelman; Robert Z. Temperature controlled circuit interrupter
JP4471479B2 (ja) * 2000-10-13 2010-06-02 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
JP4050098B2 (ja) * 2002-06-11 2008-02-20 ウチヤ・サーモスタット株式会社 直流電流遮断スイッチ
DE102004017624A1 (de) * 2004-01-30 2005-08-18 Danfoss Compressors Gmbh Starter für einen Linestart-Elektromotor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265839A (en) * 1963-08-05 1966-08-09 Fasco Industries Thermally-operable circuit breaker
NL7004367A (fr) * 1970-03-26 1971-09-28
DD119497A1 (fr) * 1975-05-24 1976-04-20
US4177443A (en) * 1978-03-31 1979-12-04 Essex Group, Inc. Thermal relay and electric range control utilizing the same
JPS5510289U (fr) * 1978-07-07 1980-01-23
DE2907763A1 (de) * 1979-02-28 1980-09-04 Siemens Ag Zeitschalter zum verzoegerten ein- und ausschalten von elektrischen geraeten
US4365225A (en) * 1980-05-05 1982-12-21 Texas Instruments Incorporated Time delay relay with spring clips

Also Published As

Publication number Publication date
EP0114071A3 (en) 1984-08-15
EP0114071A2 (fr) 1984-07-25
ES276817U (es) 1984-06-16
DE3472854D1 (en) 1988-08-25
WO1986004453A1 (fr) 1986-07-31
US4580123A (en) 1986-04-01
ES276817Y (es) 1985-02-01
DE8300960U1 (de) 1983-06-09

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