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EP0727799B1 - Dispositif de chauffage comportant un élément électrique de chauffage et une protection contre suréchauffement - Google Patents

Dispositif de chauffage comportant un élément électrique de chauffage et une protection contre suréchauffement Download PDF

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Publication number
EP0727799B1
EP0727799B1 EP96101625A EP96101625A EP0727799B1 EP 0727799 B1 EP0727799 B1 EP 0727799B1 EP 96101625 A EP96101625 A EP 96101625A EP 96101625 A EP96101625 A EP 96101625A EP 0727799 B1 EP0727799 B1 EP 0727799B1
Authority
EP
European Patent Office
Prior art keywords
heating device
contact
heating
heating element
end portion
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 - Lifetime
Application number
EP96101625A
Other languages
German (de)
English (en)
Other versions
EP0727799A2 (fr
EP0727799A3 (fr
Inventor
Volker Bachmann
Lutz Dr. Ose
Werner Kögel
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to SI9630488T priority Critical patent/SI0727799T1/xx
Publication of EP0727799A2 publication Critical patent/EP0727799A2/fr
Publication of EP0727799A3 publication Critical patent/EP0727799A3/fr
Application granted granted Critical
Publication of EP0727799B1 publication Critical patent/EP0727799B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H37/74—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
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H2009/0077—Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using recyclable materials, e.g. for easier recycling or minimising the packing material

Definitions

  • the invention relates to a Heating device which has an electrical heating element and an overtemperature fuse.
  • Such heating devices are used in particular as instantaneous heaters, e.g. for dishwashers, but also in Coffee or tea machines, immersion heaters and electric water boilers used. Your heating output is usually determined by a control adapted to the desired operating conditions regulated. For example, due to a defect Failure of the regulation or in case of strongly from the normal conditions deviating operating conditions to which the regulation Not being able to react or not being able to react adequately can be dangerous overheating of the heater.
  • a typical one Case is the "drying out" of a flow heater, i.e. the lack of medium to be heated when the medium is switched on Heater.
  • Overheating can damage or destroy temperature sensitive Guide components and provides one absolutely is a source of danger to be avoided.
  • To avoid excess temperature overtemperature fuses are used which usually an additional one that is independent of the power control Fuse represent the heater in the event of overheating off.
  • DE 28 26 205 C2 is a self-contained Fusible link fuse known from an insulating part with electrical connections and contact elements for manufacturing an electrical contact between the connections and the heating element to be secured, a heat transfer plate, a fusible link insert arranged in a sleeve as thermal Trigger and a partially inserted into the sleeve Transfer pin is made up of one end with the soldering iron insert resting on the heat transfer plate and with its other end with the contact elements is engaged.
  • the backup will be in the backup Device installed so that the heat transfer plate in heat transfer contact is located at the point whose temperature monitors and their excess temperature as a trigger for the switching of the fuse should serve.
  • the heat transfer plate heats up and transfers the Warm up the fusible link directly on top of it.
  • the solder is made of insulating material Transfer pin from the one under tension Contact element pressed into the melt, causing the contact opened and the supply current is switched off.
  • the use of fusible link is due to the surrounding, on the Heat conduction plate standing sleeve largely against plastic Flow supported at higher temperatures like a corset and enclosed by these components and the transmission pin and thus largely protected against oxidation. Because of the different with the fusible link insert in thermally conductive Connected components that come together with the insert the fuse reacts in the event of overheating relatively sluggish.
  • DE 36 33 759 A1 is in the head of a immersion heater Integrated overtemperature protection shown that a coil spring has, which in the operating state of the heating device by a The push rod is kept in a prestressed state.
  • the Nylon push rod is supported on a component of the Immersion heater. Softens when the head overheats it and is deformed, whereby the coil spring is released and moves an actuator so that this with a set Switch contacts comes into contact and the contacts opens to the Take the heating device out of operation. This is relatively complex The built-up fuse only reacts when the Boilers head.
  • GB 1 113 139 an overtemperature protection is shown at a pin made of low melting metal is provided by an end to a critical surface to be monitored is pressed. A force acts on the other end, which in Direction of opening of an electrical switch is directed. Melts at a given by the melting point of the metal Temperature of the section in contact with the surface, so the switch is opened.
  • GB 2 204 450 discloses heating device according to the preamble of the claim with one similar to GB 1 113 139 Overtemperature protection.
  • a plastic pen is supported here on a heating device for a vessel to be heated or on the The vessel itself.
  • the invention proposes Heating device with the features of claim 1.
  • preferred Embodiments are in subclaims 2 to 12 claimed.
  • the wording of the claims is by reference to Content of the description made.
  • the heating element serving as a heat source for example a wire or flat strip made of resistance material, a tubular heating element or a thick or thin layer of heating resistor material is included the connector through which it is connected to the electrical Power source is connected via electrical contact means so connected that the heating element when opening the electrical Contact is switched off.
  • the contact means strive for of the forces acting on them a state of contact opening at which there is no current through the heating element can flow.
  • the tendency to open the contact means is indicated by a Spring element causes that biased in the contact opening direction is. Also regarding a single spring element this effect the same devices, such as several springs or elastically compressible or elastically expandable Elements and combinations of these fall under the Term spring element.
  • the spring element can be directly or over Power transmission parts act on the contact means.
  • the Spring element can also itself be part of the contact means, for example a contact spring. A separate spring element can then be omitted, but can also be provided his.
  • the spring element is in the working state of the heating device, i.e. in a state in which the heating element with the connection element is in an electrically conductive connection an actuator in one of the contact closed position corresponding state pressed.
  • the actuator is supported with an end section with a defined softening temperature directly on the heating element.
  • Support By acting against the bias of the spring element Support is the end section under construction of Compressed voltage pressed against the heating element.
  • the end section is in direct heat transfer contact with the heating element and follows, at least in the area of contact, with his Temperature practically without time delay of the surface temperature of the heating element in the contact area. Increases this temperature above that provided as the switching temperature defined softening temperature of the end section, then its thrust module drops drastically. For example done by melting the material of the end section.
  • the Material of the end section is then by the force of the spring element compressed, the spring element builds while moving a contact means from at least part of its bias and the existing contact between the contact means canceled.
  • a temperature sensor directly at the point of origin the warmth, the heating element.
  • An overheating via the softening or Melting temperature of the end section is directly into a drastic thrust module lowering of the end section is transferred to the a change in shape under the pressure caused by the spring element, in particular a shortening, so that the Contact means through the spring element in the contact opening position be pressed.
  • By directly supporting the temperature sensitive End section on the heating element will be the shortest possible Reaction path reached. This makes this particularly possible quick response of the overtemperature protection according to the invention, which interrupts the heating current when the heating element if necessary, overheatable further parts of the heating device hardly above their working temperature in normal operation were warmed up. This means optimal security for parts of the heating device that are particularly sensitive to overheating guaranteed.
  • the need for separate heat transfer to the release medium, as described, for example, in DE 28 26 205 provided by the heat transfer plate is omitted.
  • the overtemperature protection of the heating device according to the invention is particularly useful, among other things, because of the End section consists of electrically non-conductive material. This results in softening or melting of the end section there is no risk that the melted Material closely adjacent heating element sections shorts.
  • the end section made of plastic. This can be a higher one Have heat capacity than, for example, fusible link, because of the poor thermal conductivity remains the area of Temperature increase limited to the area near the heating element, so that only a small amount of heat to soften or melting of the end section and thus for switching the Backup is sufficient. This increases the response speed.
  • the heating element and end section can be the end section of the outer contour of the heating element to achieve a flat contact be adjusted.
  • the end section should suitably be up to a few degrees Celsius below the defined softening or melting temperature be dimensionally stable in heat. Then also at Continuous operation at high temperatures just below the softening temperature an unwanted opening of the contacts reliably to avoid. It turned out to be advantageous if the end section made of fiber-reinforced plastic consists, in particular of glass fiber reinforced, thermoplastic Polyester. The material can be used before have also aged under external stress so it its geometric shape is not unpredictable changes. Especially with flow heaters, such as those used are shown in DE 42 33 676, it has proven that the end section has a softening temperature between 210 ° C and 240 ° C, preferably about 225 ° C, having.
  • the actuating element can possibly also consist of several parts different materials, it can also levers, push rods or other power and travel transmission elements exhibit.
  • the actuator can be advantageous a single one, at the working temperature of the heating device be essentially dimensionally stable part. It can be beneficial made entirely from the material of the end section his. Actuator and end section then form one homogeneous body made of the same material. The in State of the art often necessary combination of different Materials (e.g. ceramic pen, metal sleeve, solder) is no longer required.
  • the actuating element as a preferably axially displaceable, preferably in Insulator guided, pin trained, on which to the end section supporting the heating element is.
  • the other end can be on the spring element attack via an intermediate element.
  • the actuator can also attack directly on the spring element.
  • the actuator, especially the plastic pen can be advantageous pressed essentially perpendicular to the heating element be so that when overheated one for quick contact opening optimal shortening of the end section takes place.
  • the cross section of the pin can be rectangular, in particular square, be oval or circular. The cross section can vary also change in the axial direction.
  • the end portion of the actuator is by the Force of a spring element pressed onto the heating element.
  • the Spring element and possibly the power transmission can be the desired Construction and adapted to the installation conditions can be chosen arbitrarily.
  • the spring element can be a spiral spring be stressed in tension in the tensioned state and makes contact. It can also be a stressed one Be a compression spring that presses open the contact. This can in each case directly or via force and displacement transmitters, for example Levers, rods and the like are made so that the end section is under pressure.
  • the spring element can be attached on one side, preferably have snap spring, on the free end of which Actuator acts.
  • the actuating element can, in particular, directly on the spring element the leaf spring. It can also have a or several intermediate elements act on it. At a preferred embodiment is as an intermediate element as Leaf spring trained contact spring is provided, which is part of the Contact means is.
  • the spring element can be in the working state the heater through the actuator over the Closing the contact position beyond what the Contacts compressive force increased. This surge has the advantage that on the one hand a higher contact force Contact resistance reduced. On the other hand, the overvoltage leads to increased pressure on the end section what a faster pushing away of the material when exceeded of the softening or melting point and thus an improved one Heat transfer and faster opening of the contact can result.
  • the insulating body on the outside one with a preferably flat ribbon-shaped Heating element helically wrapped flow heater tube arranged, and the actuator, preferably a plastic pin, especially made of glass fiber reinforced Polyester, is by spring force, preferably a leaf spring, with its end section on the outside of the heating element pressed.
  • the insulating body made of electrically insulating, heat resistant material can be part of a connector body (Connecting stone), the one with the outside of the wrapped flow heater tube adapted support surface rests on it and is fastened there.
  • the Connection body can be one with a bracket outside of the Outside of the flow heater tube continuously curved away have a good heat-conducting guide bracket attached to an end piece of the heating element, preferably welded on, is.
  • the actuator, preferably the Plastic pin can be near the end piece with its end section on the first one resting on the flow heater tube Supported winding of the heating element and by the Force a leaf spring to be pressed onto it.
  • the invention is not limited to the mentioned embodiments limited. All heating systems are another application conceivable where the end section directly on the heating conductor is attachable, with geometric adjustments of the elements if necessary the overtemperature protection can be useful and the melting or softening temperature of the end section the desired switching temperature through appropriate choice of materials is to be adjusted. For example, the end section with thick or thin-film heating elements the heater printed on the substrate.
  • Fig. 1 shows part of a Flow heater tube, as it is for example in DE 42 33 676 is described, with a connector body placed thereon (Terminal block) that protects the overtemperature includes.
  • the medium 1 to be heated here water
  • the medium 1 to be heated flows through a tube 2 made of stainless steel, around the outside of which an insulating film 3 is made of polyimide.
  • the film material is available under the trade name "KAPTON" and has a thermal conductivity of more than 0.1 W / m ⁇ K and achieved at one Thickness from 20 to 100 ⁇ m a high voltage strength of more than 1250 V for at least one minute, even below higher temperatures.
  • the temperature resistance is included 200 ° C in continuous operation and 400 ° C for a short time.
  • a heating element 4 wound from a tape for example 1 to 5 mm wide and 5 to 150 ⁇ m thick consists. It can be made from common ferrous heat conductor materials, for example a chrome-aluminum-iron alloy, which is sold under the name KANTHAL AF or one Nickel-chromium-iron alloy (NICROTHAL 40+; 60+ or 80+; each nickel content).
  • KANTHAL AF chrome-aluminum-iron alloy
  • NICROTHAL 40+; 60+ or 80+; each nickel content Nickel-chromium-iron alloy
  • This thin and wide band-shaped heating element is to achieve good heat transfer between him and the tube 2 under a bias helical wrapped around the insulating film 3.
  • an end piece 5 of the Heating element on one with its outside of the bracket Outside of the tube 2 continuously curved away, good heat-conducting guide bracket 6 welded on.
  • the guide bracket 6 presses the heating element 4 on the insulating film 3.
  • the heating element is lifted from the insulating film is through the guide bracket 6, the conductive cross section so large that the heating element despite flowing current stays relatively cool and does not burn out.
  • the guide bracket 6 is on one of him in its upper Area welded welding connection 8 and through this guided rivet 9 on an insulating body 10 made of heat-resistant, electrically insulating material attached.
  • the Insulating body 10 is part of a connecting body (connecting block) 11, the one with the wrapped flow heater tube adapted concave bearing surface 12 on the flow heater tube or the heating element 4 rests.
  • On the insulating body 10 is formed by a rivet 13 as a plug connection electrical connector 14 attached, the outer end 15 for connection to an electrical voltage source serves, and at the inner end of a first contact element 16 with one curved downward in the drawing Contact surface is attached.
  • the first contact element 16 is in electrically conductive contact with the second contact element 17, the one opposite, upwards has curved contact surface and on the free end 18th a horizontal contact spring 19 is attached by the rivet 9 between the foot 20 of the welding connection 8 and the insulating body 10 is clamped.
  • the contact spring 19 is under a downward tension in the figure, which is essentially generated by a leaf spring 21 which is also between the foot 20 of the welding connection and the insulating body 10 is clamped.
  • the leaf spring 21 is designed such that it the free Press the end of the contact spring 19 down and so the electrical conductive contact between the contact elements 16 and 17 wants to cancel. Against this force of the leaf spring acts the actuator 22 that between the free end 18 of the contact spring 19 and the outside of the heating element 4 is pinched and directly with its end portion 23 supported on the heating element.
  • the actuator presses between the area of the contact element 17 and the through the rivet 9 side so under the free end 18 of the contact spring 19 that this easily, preferably about 0.3 mm, is bent upwards, which also causes the leaf spring 21 is spanned further. This increases on the one hand the built up between the contact elements 16 and 17 Contact pressure, which reduces the contact resistance. on the other hand this also increases the pressure on the end section 23 and thus improves the heat conduction between this and the Heating element 4.
  • the actuating element 22 is in the illustrated embodiment as a straight plastic pin made of glass fiber reinforced thermoplastic polyester with a square cross-section educated.
  • the polyester used in the example (Designation CRASTIN SK645FR from Dupont) has one Melting point of approx. 225 ° C and is dimensionally stable according to DIN 53461 in the heat up to 220 ° C, i.e. it changes its geometric dimensions up to a temperature of 220 ° C too practically not under the existing compressive stress.
  • the one described Material combination leads to the arrangement essentially also at continuous temperatures up to 200 ° C dimensionally stable and thus the contact reliably closed remains.
  • the heating current flows in the working state of the heating device via the connecting element 14, the first contact element 16, the second contact element 17, the contact spring 19, the welding connection 20 and the guide bracket 6 to the heating element 4, which Pipe 2 heated.
  • a short circuit between contact spring 19 and Heating element via the actuating element 22 is not possible, since at least the end section, but here the entire actuating element consists of electrically non-conductive material.
  • the plastic pin 22 directly between the free end 18 of the Contact spring 19 and the heating element 4 clamped and engages without contact with the insulating body through the in vertical bore 24 attached to it.
  • the cross section of the Plastic pin is square with a side length of 1.5 mm, and the pin is made by milling from sheets of the base material manufactured.
  • the plunger 22 rounded toward the contact spring round in cross section and fits with little play in the bore 24, the serves as a guide for the plastic plunger.
  • Fig. 4 finally shows a further embodiment in which the actuating element 22 also in the area of the bore 24 Has adapted circular cross-section and led there is.
  • the end section has a larger diameter so that it is on a larger surface on the heating element 4 rests.
  • Overtemperature protection devices may be provided, for example one at each end of the helical heating conductor in the flow heater shown.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)
  • Fuses (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (12)

  1. Moyen de chauffage avec un élément chauffant (4) et un protecteur contre une surchauffe, le protecteur contre une surchauffe avec un corps isolant (10) présentant un élément de connexion (14) et des moyens de contact (16, 17, 19) pour l'établissement d'un contact électrique entre l'élément de connexion (14) et l'élément chauffant (4), un élément élastique (21) étant prévu, lequel agit au moins sur un des moyens de contact et qui se trouve sous une tension de précontrainte en direction de l'ouverture de contact, lequel élément élastique est poussé, en état de service du moyen de chauffage, dans un état correspondant à la position de fermeture de contact par un élément d'actionnement (22) avec une section terminale (23) présentant une température de ramollissement bien déterminée, la section terminale de l'élément d'actionnement étant constituée d'un matériau qui n'est pas électroconducteur, caractérisé en ce que l'élément d'actionnement s'appuie directement à l'élément chauffant.
  2. Moyen de chauffage d'après la revendication 1, caractérisé en ce qu'il est un chauffe-eau à écoulement libre.
  3. Moyen de chauffage d'après la revendication 1 ou 2, caractérisé en ce que la section terminale (23) est composée de matière plastique et/ou en ce que l'élément d'actionnement (22) est entièrement composé du même matériau que la section terminale (23).
  4. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que la section terminale (23) est adaptée au contour extérieur de l'élément chauffant (4) pour l'obtention d'une connexion à contact mécanique des surfaces.
  5. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que la section terminale (23) est composée de matière plastique renforcée par des fibres, notamment de polyester thermoplastique renforcé par des fibres de verre.
  6. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que la section terminale (23) présente une température de fusion située entre 210 °C et 240 °C, de préférence située approximativement auprès de 225 °C.
  7. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que l'élément d'actionnement (22) s'engage directement auprès de l'élément élastique.
  8. Moyen de chauffage d'après une des revendications de 1 à 6, caractérisé en ce que l'élément d'actionnement (22) s'engage indirectement auprès de l'élément élastique (21), de préférence par l'intermédiaire d'une partie (19) des moyens de connexion.
  9. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que l'élément d'actionnement est réalisé en tant que tige (22) pouvant être déplacée en direction axiale et étant guidée de préférence dans le corps isolant (10), à la face frontale de laquelle, qui s'appuie auprès de l'élément chauffant (4), est réalisé la section terminale (23) et dont l'autre face frontale s'engage auprès de l'élément élastique (21).
  10. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que l'élément élastique présente un ressort à lames (21) fixé d'un seul côté, sur l'extrémité libre duquel agit l'élément d'actionnement (22).
  11. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce qu'en état de service du moyen de chauffage l'élément élastique (21) est mécaniquement surcontraint au-delà de la position de l'établissement du contact au moyen de l'élément d'actionnement.
  12. Moyen de chauffage d'après une des revendications précédentes, caractérisé en ce que le corps isolant (10) est disposé du côté extérieur d'un tuyau de chauffe-eau à écoulement libre (2) hélicoïdalement enrubanné d'un élément chauffant (4) de préférence en forme de bande plate et que l'élément d'actionnement (22), de préférence la tige en matière plastique, est poussé avec sa section terminale (23) sur la face extérieure de l'élément chauffant (4) par la force élastique de préférence d'un ressort à lames.
EP96101625A 1995-02-18 1996-02-06 Dispositif de chauffage comportant un élément électrique de chauffage et une protection contre suréchauffement Expired - Lifetime EP0727799B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9630488T SI0727799T1 (en) 1995-02-18 1996-02-06 Heating device comprising an electrical heating element and an overtemperature protection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19505621A DE19505621A1 (de) 1995-02-18 1995-02-18 Übertemperatursicherung für elektrische Heizeinrichtung
DE19505621 1995-02-18

Publications (3)

Publication Number Publication Date
EP0727799A2 EP0727799A2 (fr) 1996-08-21
EP0727799A3 EP0727799A3 (fr) 1997-07-23
EP0727799B1 true EP0727799B1 (fr) 2002-05-02

Family

ID=7754402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101625A Expired - Lifetime EP0727799B1 (fr) 1995-02-18 1996-02-06 Dispositif de chauffage comportant un élément électrique de chauffage et une protection contre suréchauffement

Country Status (5)

Country Link
EP (1) EP0727799B1 (fr)
AT (1) ATE217117T1 (fr)
DE (2) DE19505621A1 (fr)
ES (1) ES2173991T3 (fr)
SI (1) SI0727799T1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872767A (en) * 1995-02-17 1999-02-16 Matsushita Electric Industrial Co., Ltd. Optical disk and an optical disk recording/reproduction device having address blocks located on boundary lines between adjoining tracks
GB2315366B (en) * 1996-07-12 2000-10-18 Otter Controls Ltd Improvements relating to thermal controls for liquid heating vessels
DE19852886A1 (de) 1998-11-17 2000-05-25 Braun Gmbh Sicherheitseinrichtung für ein Wärmegerät
DE19911070B4 (de) * 1999-03-12 2007-04-26 Robert Bosch Gmbh Elektromotor mit einer Thermosicherung
DE10058973A1 (de) * 2000-11-28 2002-05-29 Rolls Royce Deutschland Permanentmagnet-Maschine sowie Sicherungseinrichtung hierfür
DE10313861A1 (de) * 2003-03-21 2004-09-30 Bleckmann Gmbh Vormontierte Anschlussbaugruppe
US7206505B2 (en) * 2004-06-29 2007-04-17 S.C. Johnson & Son, Inc. Volatizer with integrated thermal cutoff

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
GB1113139A (en) * 1966-06-02 1968-05-08 Brush Electrical Eng Thermal safety switch
DE7817937U1 (de) * 1978-06-15 1987-08-20 Inter Control Hermann Köhler Elektrik GmbH & Co KG, 8500 Nürnberg Temperatursicherung für elektrische Geräte
FR2521770B1 (fr) * 1982-02-17 1986-10-17 Seb Sa Coupe-circuit thermique pour appareils a chauffage electrique
GB2204450B (en) * 1987-05-07 1991-06-05 Strix Ltd Thermally-sensitive switch
US4864102A (en) * 1987-11-25 1989-09-05 Texas Instruments Incorporated Miniature adjustable thermostat with integral over-temperature protection
DE3843154C2 (de) * 1988-12-22 1995-07-20 Felten & Guilleaume Energie Auslöseeinrichtung für Schaltgeräte und Schaltanlagen im Mittelspannungsbereich
GB8916014D0 (en) * 1989-07-13 1989-08-31 Strix Ltd Thermally-sensitive electrical protector
IT1257915B (it) * 1992-07-14 1996-02-16 Cebi Spa Resistenza elettrica corazzata per macchine lavatrici e simili, incorporante mezzi interruttori termosensibili di protezione da sovratemperature
DE4233676A1 (de) * 1992-10-07 1994-04-14 Ego Elektro Blanc & Fischer Elektrischer Heizkörper für Medien, insbesondere Durchflußerhitzer

Also Published As

Publication number Publication date
DE19505621A1 (de) 1996-08-22
ES2173991T3 (es) 2002-11-01
EP0727799A2 (fr) 1996-08-21
DE59609138D1 (de) 2002-06-06
ATE217117T1 (de) 2002-05-15
SI0727799T1 (en) 2002-10-31
EP0727799A3 (fr) 1997-07-23

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