EP0253050B1 - Electric heating element with meander-like turns - Google Patents

Electric heating element with meander-like turns Download PDF

Info

Publication number
EP0253050B1
EP0253050B1 EP87100773A EP87100773A EP0253050B1 EP 0253050 B1 EP0253050 B1 EP 0253050B1 EP 87100773 A EP87100773 A EP 87100773A EP 87100773 A EP87100773 A EP 87100773A EP 0253050 B1 EP0253050 B1 EP 0253050B1
Authority
EP
European Patent Office
Prior art keywords
heating element
element according
insulating material
temperature switch
support bar
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
EP87100773A
Other languages
German (de)
French (fr)
Other versions
EP0253050A1 (en
Inventor
Helmut Ohnmacht
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
Application filed by Fritz Eichenauer GmbH and Co KG filed Critical Fritz Eichenauer GmbH and Co KG
Publication of EP0253050A1 publication Critical patent/EP0253050A1/en
Application granted granted Critical
Publication of EP0253050B1 publication Critical patent/EP0253050B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
    • 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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means

Definitions

  • the invention relates to an electric radiator with a meandering wound heating conductor, a breakthrough and interposed webs, the heating conductor holding the heating conductor at a number of curved ends of the turn, approximately rectangular insulating material and a second insulating material plate which is at least the same width, the heating conductor extending essentially on one side perpendicular to the first insulating material plate and on the other side the held ends of the turns being guided through the openings around the webs and being fixed by the adjacent second insulating material plate, as he is known from the document DE-C-1 185 783.
  • DE-B-1 274 760 describes a radiator which has two insulating plates which hold a zigzag-shaped or also meandering winding heat conductor.
  • winding ends or grinding tips are inserted through rows of holes in the first insulating material plate and secured on the back by inserted glass fiber bundles or the like.
  • the second insulating material plate is pressed against the back of the first and fixed.
  • the ends of the turns or grinding tips are pushed out of the holes on the back so far that the second insulating material plate rests on the first.
  • the heating conductor is approximately perpendicular to the pair of insulating plates.
  • additional holding means preferably glass fiber bundles, are required in this embodiment described by DE-B-1 274 760 for fixing the heating conductor to a pair of insulating plates. Furthermore, this arrangement is no longer stable, in particular with regard to twisting of the free winding ends, so that provision is also made for a perforated plate serving as a spacer to be pushed onto the free winding ends or grinding tips.
  • AT-C-329 702 describes a surface heating element with a surface heating element which is arranged on an insulating carrier plate.
  • the surface heating element is preferably welded in a foil and arranged on a metal foil on the carrier plate.
  • the entire arrangement, except for the area of the surface heating element, is covered by a metal sheath.
  • the Heating conductor or the surface heating element parallel to the carrier plate and not, as provided according to the invention, perpendicular to this. As a result, there are no problems with the stability of the fixed heating conductor.
  • DE-C-1 185 783 a radiator with a perforated insulating plate that holds a series of curved ends of a heating conductor.
  • the heating conductor is passed through an opening, around a web lying between the openings and out through the next opening.
  • a second insulating plate clamped on the back of the first insulating material plate clamps the held winding ends of the heating conductor between a web of the first insulating material plate and itself.
  • the heat conductor is thereby held in a vertical plane to the insulating material plates.
  • DE-A1- 3 141 828 describes stiffening or reinforcing elements for a support made of insulating material for an electrical resistance of a heater.
  • the design relates to two insulating material plates lying against one another at the rear, each of which has a heating conductor which is wound in a meandering shape and is held at a number of winding ends in a plane perpendicular to the insulating material plates.
  • devices are provided for stiffening and reinforcing the insulating material plates, which extend in the longitudinal direction of the plates and between their ends.
  • the stiffening or reinforcing elements are designed as U-shaped rails which are pushed or clamped over the longitudinal edges of the insulating material plates.
  • DE-A1- 3 141 828 does not describe how the heating conductors are attached to the respective insulating material plate and does not Proposal for the execution of a circuit.
  • US-A-3 808 573 and CH-A-40 144 each describe an electrical flat heating element, in which a heating conductor is arranged essentially in one plane in parallel between two insulating material plates or layers. Both are partially or completely surrounded by a metal frame. The heating conductors are therefore not arranged in a plane perpendicular to the insulating material plates, as is provided in the object according to the invention registered. Furthermore, in neither of the two documents is a proposal given for an electric circuit for feeding the heating conductors.
  • the invention has for its object to provide a generic radiator, in particular with a large length and a small width in a technically simple and advantageous manner with greater stability.
  • a holding rail is provided which extends over the entire width of the insulating material plates and essentially over their length and lies on the second insulating material plate, that the holding rail has both longitudinal edges of the superimposed insulating material panels and these tabs on both sides, that the tabs and the holding rail are formed in one piece, that the holding rail consists of an electrically conductive material, in particular metal, and that the holding rail forms a return line for a power supply to the heating conductor.
  • connection contacts are provided on one end face for the connection of electrical connections and the heating conductors are electrically connected to the rail on the other end face
  • the rail has openings and webs on the side facing away from the tabs having.
  • the invention generally creates a possibly narrow and elongated, highly stable radiator in a simple manner in terms of production technology. If the holding ticket consists of metallic material and is used as a return conductor, its connection contact can be loosened to it or, in an extremely preferred embodiment, can be formed in one piece with the holding rail. the electrical connection of the heating conductor on the end face opposite the connection end face is preferably carried out via an eyelet, so that a reliable mechanical and electrical contact is established here.
  • the invention therefore provides in an extremely preferred embodiment that a temperature switch is slidably attached to the holding rail, wherein in particular the holding rail is encompassed by tabs of a holder for a temperature switch.
  • the temperature switch can be secured to it against falling or removing, but can be mounted displaceably along the rail or the rails. This makes it possible to manufacture the complete radiator with the associated temperature switch and to store it with a processor who will then, depending on the installation conditions moves the temperature switch along the rail to a desired location, where the temperature switch is either held in a force-locking manner or, in addition, cannot be fixed releasably, for example by riveting or soldering to the rail.
  • the temperature switch can be fixed to the holding rail by means of the webs.
  • the rail can also be used as a conductor for the current conducted via the temperature switch, so that the rail is made into an electrical connection via the holder for the temperature switch to make a contact.
  • the other contact of the switch must be insulated from the holder of the switch and be provided with a separate connection element for connecting a cable.
  • the electric heater 1 has a heating conductor 2 ⁇ with initially one or more rows of meandering turns 2 made of electrical resistance wire.
  • the legs of a turn 2 are longer than their distance.
  • the turns 2 are fixed to a first insulating plate 3 in the following way:
  • the insulating plate 3 has openings 4 which are separated from one another by webs 6.
  • One end 7 of a turn passes through an opening 4, is then guided around the web 6 and emerges again through an adjacent opening 4.
  • the assembly of the insulating plate 3 and the heating conductor 2 ⁇ with the turns 2 can be done in that the insulating plate 3 with their openings on the ends 7 facing away from the ends 8 of the turns 2 are performed.
  • Another insulating plate 9 is placed on the side of the insulating plate 3 facing away from the heating conductor 2 ist.
  • the radiator described so far is stiffened and in particular the two insulating plates 3, 9 are held together by a stiffening rail 11 which extends on the side of the insulating plates 3, 9 facing away from the heating conductor 2 with a main part 12 over the entire width of the insulating plates 3, 9 and has at its longitudinal edges around the longitudinal edges 13, 14 of the insulating plates 3, 9 except for the top 16 of the insulating plate 3 tabs 17 bent by 180 degrees.
  • the plates 3, 9 are firmly clamped against one another and the entire radiator 1 is stabilized.
  • connecting parts 24 with contact tabs 22, 23 are first arranged, which are in electrical connection with the heating conductor 2 ⁇ and serve to connect the heating conductor 2 ⁇ as electrical connections.
  • the rows of meanders are contacted as follows: in the end region of the upper insulating plate 3, an insulating web 19 delimited by two slots 18 is formed in alignment with the rows of meanders. On this sits a vertical section U-shaped connecting part 24 with a bottom web 29, which has a side in the slots 18 and the insulating web 19 encompassing tabs 36.
  • a connecting part 24 On the connecting part 24, on the one hand, one of the contact tabs 22 and 23 for connecting connecting lines and, on the other hand, a crimping part 37 for connection to the end 38 of a row of turns is formed.
  • the end 38 of the row of turns is a piece through a last opening 4 of the insulating plate 3 and between legs 39 of the crimping part 37, which firmly grip it after being squeezed together.
  • the rail 11 On the first end face 21 of the radiator 1, the rail 11 is also provided with a connection contact 28 which is riveted to it, for example.
  • the heating conductor 2 ⁇ In the area of the end face 21 facing away from the end face 21, the heating conductor 2 ⁇ is electrically connected to the rail 11, for example via a rivet or in principle in the manner described above for the connecting parts 24 with a connecting part 27, which with a crimping part 67 is a bent-up tab 68 Rail 11 grips tightly.
  • the rail 11 serves as a return conductor, so that in the illustrated embodiment, depending on the circuit with the contact tabs 22, 23, 28 connected to a power supply, the two rows of the heating conductor 2 ⁇ can be connected either individually or together. Also, if necessary, a row of the heating conductor 2 ⁇ via the middle connection contact 28 Series resistor for a motor to be connected, for example a fan.
  • a contact created on the end face 26 facing away from the first end face 21 from the heating conductor 22 to the rail 21 can enable the power supply to be connected on one end to the first end face 21 via the possibilities explained above.
  • the rail 11 has openings 31 and webs 32 on the side facing away from the heating conductor 2 ⁇ .
  • This configuration improves, in particular, the compensation of the different thermal expansion behavior of the insulating plates 3, 9 and the rail 11.
  • this arrangement can serve, with suitable installation conditions, to dispense with the second insulating plate 9 or to hold the heating conductor, if necessary 2 ⁇ approximately in the middle of the winding height.
  • the webs 32 of the holding rail 11 have central widenings 33 with a through hole 34.
  • a corresponding projection of a holder 41 for a temperature switch 42 which can be displaced along the rail 11 can snap into these holes 34 (FIG. 4).
  • the holder 41 of a temperature switch 42 can also be loosened or dotted on the widened webs 32 with the openings 34.
  • the insulating material plates 3, 9 with the holes 34 aligned openings 69 ( Figure 1) with a larger radius, so that the loosening can easily be done on finished radiators.
  • a corresponding holder 41 for a temperature switch 42 can be seen in particular from FIGS. 4 to 6.
  • the bracket 41 first has the width of the rail 11 bridging bow-like web 43, at the ends of which the tabs 17 of the holding rail 11 are formed around tabs 44, by means of which the holder 41 is held on the rail 11 and is displaceable along the latter.
  • a bead 46 is formed centrally in the web 43 and bears as an abutment to the tabs 44 on the underside of the holding rail 11 or in the region of the openings 32 of the lower insulating plate 14. With the bead 46, the holder 41 can be fixed after setting in the desired position on the holding rail 11, for example by spot welding or the like.
  • a shoulder 47 On one side extends from the web 43, essentially in alignment with it, a shoulder 47, from which in turn a flange 48 protrudes upward, the end 49 of which is bent laterally. At this bent end 49, the temperature switch 42 is fastened with a contact 51, as if it had been loosened.
  • an insulating bridge 52 On the web 47, an insulating bridge 52 is insulated from the web 47 and an angle part 53 is fastened with a flange 54.
  • a projection 56 of the insulating part 52 protrudes between the shoulder 47 and the flange 54, by means of which the parts 47, 54 connected to the insulating part 52, for example by eyelets, are held in a rotationally secure manner.
  • the other end 58 of the temperature switch 42 which is held securely in this way, is fastened to a flange 57 which is bent away from the angle part 53 against the direction of the extension 54 but also the extension 49 of the part 48.
  • 61 is an insulating support part of the temperature switch, with 62 a bearing for a bimetallic disk 63, with 64 the movable contact switched by the bimetallic disk 63 and with 66 the stationary counter contact of the temperature switch 42 cut out and bent out of the contact tab 58.
  • the configuration according to the invention also allows a plurality of temperature switches on the holding rail 11 in succession are arranged and, if necessary, fixed so that local overheating, which would not lead to a safety shutdown in a device with only one monitor, if they occur at a distance from this, is reliably taken into account.
  • Several temperature switches in the form of controllers can also be provided. Part of the temperature switch can also be a controller and another part can be a watchdog.

Landscapes

  • Resistance Heating (AREA)
  • Air-Conditioning For Vehicles (AREA)

Description

Die Erfindung betrifft einen elektrischen Heizkörper mit einem mäanderförmig gewundenen Heizleiter, einer Durchbrüche und dazwischenliegenden Stege aufweisenden, den Heizleiter an einer Reihe gebogener Windungsenden haltenden, etwa rechteckigen Isolierstoffplatte und einer zweiten zumindest in der Breite gleichen Isolierstoffplatte, wobei sich der Heizleiter im wesentlichen auf einer Seite senkrecht zur ersten Isolierstoffplatte erstreckt und auf der anderen Seite die gehaltenen Windungsenden durch die Durchbrüche hindurch um die Stege herumgeführt und durch die anliegende zweite Isolierstoffplatte festgelegt sind, wie er aus der Druckschrift DE-C- 1 185 783 bekannt ist.The invention relates to an electric radiator with a meandering wound heating conductor, a breakthrough and interposed webs, the heating conductor holding the heating conductor at a number of curved ends of the turn, approximately rectangular insulating material and a second insulating material plate which is at least the same width, the heating conductor extending essentially on one side perpendicular to the first insulating material plate and on the other side the held ends of the turns being guided through the openings around the webs and being fixed by the adjacent second insulating material plate, as he is known from the document DE-C-1 185 783.

Die DE-B- 1 274 760 beschreibt einen Heizkörper, der zwei Isolierstoffplatten aufweist, die einen zickzackförmig bzw. auch als mäanderförmig bezeichenbaren gewundenen Heizleiter halten. Dabei werden jedoch durch Lochreihen in der ersten Isolierstoffplatte Windungsenden bzw. Schleifspitzen hindurchgesteckt und rückseitig durch eingeführte Glasfaserbündel oder dergleichen gesichert. Durch Aufschrauben, Vernieten oder dergleichen wird die zweite Isolierstoffplatte rückseitig gegen die erste gedrückt und festgelegt. Dadurch werden die Windungsenden bzw. Schleifspitzen rückseitig aus den Löchern wieder so weit herausgedrückt, daß die zweite Isolierstoffplatte auf der ersten aufliegt. Dadurch steht der Heizleiter etwa senkrecht auf dem Isolierstoffplattenpaar. Im Gegensatz zum erfindungsgemäßen Gegenstand der Anmelderin werden in dieser durch die DE-B- 1 274 760 beschriebenen Ausführung zusätzliche Haltemittel, vorzugsweise Glasfaserbündel, zur Festlegung des Heizleiters an einem Isolierstoffplattenpaar benötigt. Desweiteren ist diese Anordnung nicht mehr stabil, insbesondere bezüglich einem Verwinden der freien Windungsenden, so daß auch Vorgesehen ist, daß eine als Abstandshalter dienende Lochplatte auf die freien Windungsenden bzw. Schleifspitzen aufgeschoben wird.DE-B-1 274 760 describes a radiator which has two insulating plates which hold a zigzag-shaped or also meandering winding heat conductor. In this case, however, winding ends or grinding tips are inserted through rows of holes in the first insulating material plate and secured on the back by inserted glass fiber bundles or the like. By screwing, riveting or the like, the second insulating material plate is pressed against the back of the first and fixed. As a result, the ends of the turns or grinding tips are pushed out of the holes on the back so far that the second insulating material plate rests on the first. As a result, the heating conductor is approximately perpendicular to the pair of insulating plates. In contrast to the subject matter of the applicant according to the invention, additional holding means, preferably glass fiber bundles, are required in this embodiment described by DE-B-1 274 760 for fixing the heating conductor to a pair of insulating plates. Furthermore, this arrangement is no longer stable, in particular with regard to twisting of the free winding ends, so that provision is also made for a perforated plate serving as a spacer to be pushed onto the free winding ends or grinding tips.

Die AT-C- 329 702 beschreibt einen Flächenheizkörper mit einem Flächenheizelement, das auf einer isolierenden Trägerplatte angeordnet ist. Das Flächenheizelement ist vorzugsweise in einer Folie eingeschweißt und auf einer Metallfolie auf der Trägerplatte angeordnet. Die gesamte Anordnung bis auf den Bereich des Flächenheizelementes wird durch eine Metallumhüllung umfaßt. Bei dieser Anordnung ist der Heizleiter bzw. das Flächenheizelement parallel zur Trägerplatte und nicht, wie erfindungsgemäß vorgesehen, senkrecht zu dieser angeordnet. Demzufolge ergeben sich auch keine Probleme bezüglich der Stabilität des festgelegten Heizleiters.AT-C-329 702 describes a surface heating element with a surface heating element which is arranged on an insulating carrier plate. The surface heating element is preferably welded in a foil and arranged on a metal foil on the carrier plate. The entire arrangement, except for the area of the surface heating element, is covered by a metal sheath. In this arrangement, the Heating conductor or the surface heating element parallel to the carrier plate and not, as provided according to the invention, perpendicular to this. As a result, there are no problems with the stability of the fixed heating conductor.

Die DE-C- 1 185 783 einen Heizkörper mit einer mit Durchbrechungen versehenen Isolierstoffplatte, die eine Reihe gebogener Windungsenden eines Heizleiters hält. Der Heizleiter wird jeweils durch einen Durchbruch hindurchgeführt, um ein zwischen den Durchbrechungen liegenden Steg herum und durch die nächste Durchbrechung wieder herausgeführt. Eine rückseitig an der ersten Isolierstoffplatte verklammerte zweite Isolierstoffplatte klemmt die gehaltenen Windungsenden des Heizleiters jeweils zwischen einem Steg der ersten Isolierstoffplatte und sich ein. Der Heizleiter wird dadurch in einer senkrechten Ebene zu den Isolierstoffplatten gehalten. Es ergibt sich der Nachteil, daß die zwei verklammerten Isolierstoffplatten keine ausreichende Festigkeit bei thermischen Spannungen des Heizleiters aufweisen. Dadurch ist die Gefahr gegeben, daß beim Erhitzen des Heizleiters, das heißt im Betrieb des Heizkörpers, die Gefahr gegeben ist, daß sich die freien Windungsenden des Heizleiters so verformen, daß eine gewisse Brand- oder Kurzschlußgefahr entsteht. Bezüglich der Verwirklichung eines Stromkreises zur Versorgung des Heizleiters ist lediglich aus Figur 6 eine Anordnung von zwei rückseitig an der zweiten Isolierstoffplatte zueinander angeordneten Heizkörpern zu erkennen. Dabei ist vorgesehen, daß an einer Seite die Heizleiter miteinander verbunden werden und an der anderen Seite zwei Stromzuführungskontakte gebildet sind.DE-C-1 185 783 a radiator with a perforated insulating plate that holds a series of curved ends of a heating conductor. The heating conductor is passed through an opening, around a web lying between the openings and out through the next opening. A second insulating plate clamped on the back of the first insulating material plate clamps the held winding ends of the heating conductor between a web of the first insulating material plate and itself. The heat conductor is thereby held in a vertical plane to the insulating material plates. The disadvantage arises that the two clamped insulating material plates do not have sufficient strength under thermal stresses of the heating conductor. This gives rise to the risk that when the heating conductor is heated, that is to say when the heating element is in operation, there is a risk that the free winding ends of the heating conductor will deform in such a way that there is a certain risk of fire or short circuit. With regard to the implementation of a circuit for supplying the heating conductor, only an arrangement of two radiators arranged on the rear side of the second insulating material plate can be seen from FIG. 6. It is provided that the heating conductors are connected to one another on one side and two power supply contacts are formed on the other side.

Die DE-A1- 3 141 828 beschreibt Versteifungs- bzw. Verstärkungselemente für einen Träger aus Isoliermaterial für einen elektrischen Widerstand eines Heizgerätes. Insbesondere bezieht sich die Ausführung auf zwei rückwärtig aneinanderliegende Isolierstoffplatten, die jeweils einen mäanderförmig gewundenen Heizleiter aufweisen, der an einer Reihe von Windungsenden in einer Ebene senkrecht zu den Isolierstoffplatten gehalten ist. Um zu verhindern, daß sich beim Erhitzen die Isolierstoffplatten durch Biegen oder Wölben verformt werden, sind Einrichtungen zum Versteifen und Verstärken der Isolierstoffplatten vorgesehen, die in Längsrichtung der Platten und zwischen deren Enden verlaufen. Insbesondere sind die Versteifungs- bzw. Verstärkungselemente als U-förmige Schienen ausgebildet, die über die Längskanten der Isolierstoffplatten geschoben bzw. geklemmt werden, Die DE-A1- 3 141 828 beschreibt nicht, wie die Heizleiter an der jeweiligen Isolierstoffplatte befestigt werden und macht keinen Vorschlag im Hinblick auf die Ausführung eines Stromkreises.DE-A1- 3 141 828 describes stiffening or reinforcing elements for a support made of insulating material for an electrical resistance of a heater. In particular, the design relates to two insulating material plates lying against one another at the rear, each of which has a heating conductor which is wound in a meandering shape and is held at a number of winding ends in a plane perpendicular to the insulating material plates. In order to prevent the insulating material plates from being deformed by bending or arching when heated, devices are provided for stiffening and reinforcing the insulating material plates, which extend in the longitudinal direction of the plates and between their ends. In particular, the stiffening or reinforcing elements are designed as U-shaped rails which are pushed or clamped over the longitudinal edges of the insulating material plates. DE-A1- 3 141 828 does not describe how the heating conductors are attached to the respective insulating material plate and does not Proposal for the execution of a circuit.

Die US-A- 3 808 573 und CH-A- 40 144 beschreiben jeweils einen elektrischen Flachheizkörper, bei dem jeweils ein Heizleiter im wesentlichen in einer Ebene parallel zwischen zwei Isolierstoffplatten bzw. -schichten angeordnet ist. Beide sind teilweise oder vollständig von einer Metalleinfassung umgeben. Die Heizleiter sind also nicht, wie beim erfindungsgemäßen angemeldeten Gegenstand vorgesehen, in einer Ebene senkrecht zu den Isolierstoffplatten angeordnet. Desweiteren wird in keiner der beiden Druckschriften ein Vorschlag zu einer Ausführung eines Stromkreises zur Speisung der Heizleiter gegeben.US-A-3 808 573 and CH-A-40 144 each describe an electrical flat heating element, in which a heating conductor is arranged essentially in one plane in parallel between two insulating material plates or layers. Both are partially or completely surrounded by a metal frame. The heating conductors are therefore not arranged in a plane perpendicular to the insulating material plates, as is provided in the object according to the invention registered. Furthermore, in neither of the two documents is a proposal given for an electric circuit for feeding the heating conductors.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Heizkörper insbesondere mit großer Länge und geringer Breite in fertigungstechnisch einfacher und vorteilhafter Weise mit einer größeren Stabilität zu versehen.The invention has for its object to provide a generic radiator, in particular with a large length and a small width in a technically simple and advantageous manner with greater stability.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß
eine sich über die gesamte Breite der Isolierstoffplatten und im wesentlichen über deren Länge erstreckende, auf der zweiten Isolierstoffplatte anliegende Halteschiene vorgesehen ist,
daß die Halteschiene beide Längskanten der übereinanderliegenden Isolierstoffplatten umgreifende und diese festlegende Laschen beidseitig aufweist,
daß die Laschen und die Halteschiene einstückig ausgebildet sind,
daß die Halteschiene aus einem elektrisch leitenden Material, insbesondere Metall, besteht,
und daß die Halteschiene eine Rückleitung einer Stromversorgung des Heizleiters bildet.This object is achieved in that
a holding rail is provided which extends over the entire width of the insulating material plates and essentially over their length and lies on the second insulating material plate,
that the holding rail has both longitudinal edges of the superimposed insulating material panels and these tabs on both sides,
that the tabs and the holding rail are formed in one piece,
that the holding rail consists of an electrically conductive material, in particular metal,
and that the holding rail forms a return line for a power supply to the heating conductor.

Hierdurch wird eine Versteifung des Trägers in zwei Richtung eereicht.As a result, a stiffening of the beam is achieved in two directions.

In äußerst bevorzugter Ausgestaltung ist vorgesehen, daß an einer Stirnseite Anschlußkontakte zum Anschluß elektrischer Verbindungen vorgesehen sind und die Heizleiter an der anderen Stirnseite mit der Schiene elektrisch verbunden sind, während eine weitere Ausbildung vorsieht, daß die Schiene auf der den Laschen abgewandten Seite Durchbrechungen und Stege aufweist. Durch diese Ausgestaltung wird insbesondere das unterschiedliche Wärmedehnungsverhalten von Isolierplatten und Halteschiene in einfacher und optimaler Weise aufgenommen, so daß keine Verbiegungen des Heizkörpers, insbesondere der Windungsträger eintreten, was zu einem Berühren von Windungsenden, damit durch einen Kurzschluß zu einer Widerstandsreduzierung des gesamten Heizleiters und damit zu einer Beschädigung desselben führen könnte; dies wird durch die genannte Ausgestaltung zuverlässig ausgeschlossen.In an extremely preferred embodiment it is provided that connection contacts are provided on one end face for the connection of electrical connections and the heating conductors are electrically connected to the rail on the other end face, while a further embodiment provides that the rail has openings and webs on the side facing away from the tabs having. This configuration, in particular, absorbs the different thermal expansion behavior of the insulating plates and the holding rail in a simple and optimal manner, so that there is no bending of the heating element, in particular of the winding support, which leads to the ends of the winding touching, and thus to a short circuit to reduce the resistance of the entire heating conductor and thus could damage it; this is reliably excluded by the mentioned design.

Durch die Erfindung wird insgesamt in fertigungstechnische einfacher Weise ein gegebenenfalls schmaler und langgestreckter hochstabiler Heizkörper geschaffen. Wenn die Haltescheine aus metallischen Material besteht und als Rückleiter eingesetzt wird, so kann ihr Anschlußkontakt an ihr festgeöst sein oder aber in äußerst bevorzugter Ausgestaltung einstückig mit der Halteschiene ausgebildet sein. die elektrische Verbindung des Heizleiters an der der Anschlußstirnseite entgegengesetzten Stirnseite erfolgt vorzugsweise über eine Öse, so daß hier ein zuverlässiger mechanischer und elektrischer Kontakt hergestellt ist.The invention generally creates a possibly narrow and elongated, highly stable radiator in a simple manner in terms of production technology. If the holding ticket consists of metallic material and is used as a return conductor, its connection contact can be loosened to it or, in an extremely preferred embodiment, can be formed in one piece with the holding rail. the electrical connection of the heating conductor on the end face opposite the connection end face is preferably carried out via an eyelet, so that a reliable mechanical and electrical contact is established here.

Soweit bisher Temperaturschalter (Regler und Wächter) bei gattungsgemäßen Heizkörpern vorgesehen waren, so mußten diese von vornherein an einen bestimmten Ort festgelegt werden. Dieser Festlegungsort konnte nicht die unterschiedlichen Einbauverhältnisse und damit unterschiedlichen Temperaturverhältnisse in verschiedenen Geräten berücksichtigen, so daß gegebenenfalls für verschiedene Geräte separate Heizkörper vorgesehen und auf Lager gehalten mußten bzw. sich je nach Gerät Probleme dahingehend ergeben konnten, daß der Temperaturschalter nicht bei gewünschten Temperaturbedingungen ansprach.As far as temperature switches (controllers and monitors) were previously provided for generic radiators, they had to be set in a certain place from the start. This location could not take into account the different installation conditions and thus different temperature conditions in different devices, so that separate radiators had to be provided for different devices and kept in stock or problems could arise depending on the device that the temperature switch did not respond under the desired temperature conditions.

Die Erfindung sieht daher in äußerst bevorzugter Ausgestaltung vor, daß an der Halteschiene ein Temperaturschalter verschiebbar angebracht ist, wobei insbesondere die Halteschiene durch Laschen einer Halterung für einen Temperaturschalter umgriffen wird. Durch die Verwendung durchgehender Halteschienen wird die Möglichkeit geschaffen, daß der Temperaturschalter zwar an diesen gegen Abfallen bzw. Entfernen gesichert, aber entlang der Schiene bzw. der Schienen verschiebbar gelagert sein kann. Hierdurch ist es möglich den vollständigen Heizkörper mit zugehörigem Temperaturschalter herzustellen und bei einem Weiterverarbeiter zu lagern, der dann je nach Einbaubedingungen den Temperaturschalter entlang der Schiene zu einem gewünschten Ort verschiebt, wo der Temperaturschalter entweder kraftschlüssig gehalten wird oder aber zusätzlich nicht lösbar festgelegt werden kann, beispielsweise durch Vernieten oder Verlöten an der Schiene. Soweit die Schiene aus Seitenlaschen, die durch Stege verbunden sich, gebildet ist, sieht eine weitere Ausbildung vor, daß der Temperaturschalter über die Stege der Halteschiene an dieser festlegbar ist. Die Schiene kann auch als Leiter für den über den Temperaturschalter geführten Strom eingesetzt werden, so daß von der Schiene über die Halterung für den Temperaturschalter zu einem Kontakt desselben in eine elektrische Verbindung geschaffen ist. Der andere Kontakt des Schalters muß gegenüber der Halterung des Schalters isoliert und mit einem separaten Anschlußelement zum Anschluß eines Kabels versehen sein.The invention therefore provides in an extremely preferred embodiment that a temperature switch is slidably attached to the holding rail, wherein in particular the holding rail is encompassed by tabs of a holder for a temperature switch. Through the use of continuous holding rails, the possibility is created that the temperature switch can be secured to it against falling or removing, but can be mounted displaceably along the rail or the rails. This makes it possible to manufacture the complete radiator with the associated temperature switch and to store it with a processor who will then, depending on the installation conditions moves the temperature switch along the rail to a desired location, where the temperature switch is either held in a force-locking manner or, in addition, cannot be fixed releasably, for example by riveting or soldering to the rail. As far as the rail is formed from side tabs, which are connected by webs, a further embodiment provides that the temperature switch can be fixed to the holding rail by means of the webs. The rail can also be used as a conductor for the current conducted via the temperature switch, so that the rail is made into an electrical connection via the holder for the temperature switch to make a contact. The other contact of the switch must be insulated from the holder of the switch and be provided with a separate connection element for connecting a cable.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Ansprüchen und aus der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel des erfindungsgemäßen Heizkörpers unter Bezugnahme auf die Zeichnung im einzelnen erläutert ist. Dabei zeigt:

Fig. 1
eine Ausführungsform des erfindungsgemäßen Heizkörpers in perspektivischer Darstellung;
Fig. 2
die gleiche Ausführungsform im Längsschnitt;
Fig. 3
eine Sicht von unten auf eine Halteschiene;
Fig. 4
einen Schnitt durch den mit einem Temperaturschalter versehenen Heizkörper;
Fig. 5
eine Sicht auf den Halter für den Temperaturschalter sowie den Temperaturschalter entsprechend dem Pfeil V der Figur 4; und
Fig. 6
eine Aufsicht auf Temperaturschalter mit Halter entsprechend dem Pfeil VI der Figur 4.
Further advantages and features of the invention result from the claims and from the following description, in which an embodiment of the radiator according to the invention is explained in detail with reference to the drawing. It shows:
Fig. 1
an embodiment of the radiator according to the invention in a perspective view;
Fig. 2
the same embodiment in longitudinal section;
Fig. 3
a bottom view of a support rail;
Fig. 4
a section through the heater provided with a temperature switch;
Fig. 5
a view of the holder for the temperature switch and the temperature switch according to the arrow V of Figure 4; and
Fig. 6
a supervision of temperature switch with holder according to the arrow VI of Figure 4.

Der erfindungsgemäße elektrische Heizkörper 1 weist einen Heizleiter 2ʹ mit zunächst ein oder mehreren Reihen von mäanderförmigen Windungen 2 aus elektrischen Widerstandsdraht auf. Die Schenkel einer Windung 2 sind länger als ihr Abstand. Die Windungen 2 sind an einer ersten Isolierplatte 3 in der folgenden Weise festgelegt: Die Isolierplatte 3 weist Durchbrüche 4 auf, die durch Stege 6 voneinander getrennt sind. Ein Ende 7 einer Windung tritt durch einen Durchbruch 4 hindurch, ist dann um den Steg 6 herumgeführt und tritt durch einen benachbarten Durchbruch 4 wieder heraus. Der Zusammenbau der Isolierplatte 3 und des Heizleiters 2ʹ mit den Windungen 2 kann dadurch erfolgen, daß die Isolierplatte 3 mit ihren Durchbrüchen über die den Enden 7 abgewandten Enden 8 der Windungen 2 geführt werden. Auf der dem Heizleiter 2ʹ abgewandten Seite der Isolierplatte 3 ist eine weitere Isolierplatte 9 aufgelegt.The electric heater 1 according to the invention has a heating conductor 2ʹ with initially one or more rows of meandering turns 2 made of electrical resistance wire. The legs of a turn 2 are longer than their distance. The turns 2 are fixed to a first insulating plate 3 in the following way: The insulating plate 3 has openings 4 which are separated from one another by webs 6. One end 7 of a turn passes through an opening 4, is then guided around the web 6 and emerges again through an adjacent opening 4. The assembly of the insulating plate 3 and the heating conductor 2ʹ with the turns 2 can be done in that the insulating plate 3 with their openings on the ends 7 facing away from the ends 8 of the turns 2 are performed. Another insulating plate 9 is placed on the side of the insulating plate 3 facing away from the heating conductor 2 ist.

Der insoweit beschriebene Heizkörper wird versteift und insbesondere die beiden Isolierplatten 3, 9 werden zusammengehalten durch eine Versteifungsschiene 11, die sich auf der dem Heizleiter 2 abgewandten Seite der Isolierplatten 3, 9 mit einem Hauptteil 12 über die gesamte Breite der Isolierplatten 3, 9 erstreckt und an seinen Längsrändern um die Längsränder 13, 14 der Isolierplatten 3, 9 bis auf die Oberseite 16 der Isolierplatte 3 insgesamt um 180 Grad abgebogene Laschen 17 aufweist. Hierdurch werden die Platten 3, 9 fest gegeneinander verspannt und der gesamte Heizkörper 1 stabilisiert.The radiator described so far is stiffened and in particular the two insulating plates 3, 9 are held together by a stiffening rail 11 which extends on the side of the insulating plates 3, 9 facing away from the heating conductor 2 with a main part 12 over the entire width of the insulating plates 3, 9 and has at its longitudinal edges around the longitudinal edges 13, 14 of the insulating plates 3, 9 except for the top 16 of the insulating plate 3 tabs 17 bent by 180 degrees. As a result, the plates 3, 9 are firmly clamped against one another and the entire radiator 1 is stabilized.

An einem Stirnende 21 des Heizkörpers 1 sind zunächst Anschlußteile 24 mit Kontaktlaschen 22, 23 angeordnet, die mit dem Heizleiter 2ʹ in elektrischer Verbindung stehen und zum Anschluß des Heizleiters 2ʹ als elektrische Verbindungen dienen.At an end 21 of the radiator 1, connecting parts 24 with contact tabs 22, 23 are first arranged, which are in electrical connection with the heating conductor 2ʹ and serve to connect the heating conductor 2ʹ as electrical connections.

Die Kontaktierung der Mäanderreihen erfolgt folgendermaßen: Im Endbereich der oberen Isolierplatte 3 ist jeweils fluchtend mit den Mäanderreihen ein von zwei Schlitzen 18 begrenzter Isoliersteg 19 ausgebildet. Auf diesem sitzt ein im senkrechten Schnitt U-förmiges Anschlußteil 24 mit einem Bodensteg 29, der seitlich in die Schlitze 18 ein und den Isoliersteg 19 umgreifende Laschen 36 aufweist. Am Anschlußteil 24 ist weiter einerseits eine der Kontaktlaschen 22 bzw. 23 zum Anschluß von Anschlußleitungen und andererseits ein Quetschteil 37 zur Verbindung mit dem Ende 38 einer Windungsreihe ausgebildet. Das Ende 38 der Windungsreihe ist dazu ein Stück durch einen letzten Durchbruch 4 der Isolierplatte 3 heraus und zwischen Schenkel 39 des Quetschteils 37 geführt, die es nach Zusammenquetschen fest umgreifen.The rows of meanders are contacted as follows: in the end region of the upper insulating plate 3, an insulating web 19 delimited by two slots 18 is formed in alignment with the rows of meanders. On this sits a vertical section U-shaped connecting part 24 with a bottom web 29, which has a side in the slots 18 and the insulating web 19 encompassing tabs 36. On the connecting part 24, on the one hand, one of the contact tabs 22 and 23 for connecting connecting lines and, on the other hand, a crimping part 37 for connection to the end 38 of a row of turns is formed. For this purpose, the end 38 of the row of turns is a piece through a last opening 4 of the insulating plate 3 and between legs 39 of the crimping part 37, which firmly grip it after being squeezed together.

An der ersten Stirnseite 21 des Heizkörpers 1 ist die Schiene 11 ebenfalls mit einem Anschlußkontakt 28 versehen, der an dieser beispielsweise angenietet ist. Im Bereich der der Stirnseite 21 abgewandten Stirnseite 26 ist der Heizleiter 2ʹ elektrisch mit der Schiene 11, beispielsweise über einen Niet oder grundsätzlich in der vorstehend für die Anschlußteile 24 beschriebenen Wiese mit einem Verbindungsteil 27 verbunden, welches mit einem Quetschteil 67 eine hochgebogene Lasche 68 der Schiene 11 fest umgreift. Die Schiene 11 dient derart als Rückleiter, so daß bei dem dargestellten Ausführungsbeispiel je nach Schaltung mit den Kontaktlaschen 22, 23, 28 verbundene Anschlußleitung zu einer Stromversorgung die beiden Reihen des Heizleiters 2ʹ wahlweise einzeln oder gemeinsam angeschlossen werden können. Auch kann gegebenenfalls über den mittleren Anschlußkontakt 28 eine Reihe des Heizleiters 2ʹ als Vorwiderstand für einen anzuschließenden Motor, beispielsweise eines Lüfters dienen.On the first end face 21 of the radiator 1, the rail 11 is also provided with a connection contact 28 which is riveted to it, for example. In the area of the end face 21 facing away from the end face 21, the heating conductor 2ʹ is electrically connected to the rail 11, for example via a rivet or in principle in the manner described above for the connecting parts 24 with a connecting part 27, which with a crimping part 67 is a bent-up tab 68 Rail 11 grips tightly. The rail 11 serves as a return conductor, so that in the illustrated embodiment, depending on the circuit with the contact tabs 22, 23, 28 connected to a power supply, the two rows of the heating conductor 2ʹ can be connected either individually or together. Also, if necessary, a row of the heating conductor 2ʹ via the middle connection contact 28 Series resistor for a motor to be connected, for example a fan.

Bei einer Windungsreihe kann über die vorstehend erläuterten Möglichkeiten ein an der der ersten Stirnseite 21 abgewandten Stirnseite 26 vom Heizleiter 22 zur Schiene 21 geschaffener Kontakt den einseitigen Anschluß der Stromversorgung an der ersten Stirnseite 21 ermöglichen.In the case of a row of turns, a contact created on the end face 26 facing away from the first end face 21 from the heating conductor 22 to the rail 21 can enable the power supply to be connected on one end to the first end face 21 via the possibilities explained above.

Insbesondere der Figur 2 ist zu entnehnem, daß die Schiene 11 auf der dem Heizleiter 2ʹ abgewandten Seite Durchbrüche 31 und Stege 32 aufweist. Diese Ausgestaltung verbessert insbesondere die Kompensation des unterschiedlichen Wärmedehnungsverhaltens der Isolierplatten 3, 9 und der Schiene 11. Weiterhin kann bei geeigneter Anordnung der Stege 32 dieser bei geeigneten Einbauverhältnissen diese Anordnung dazu dienen, gegebenenfalls auf die zweite Isolierplatte 9 zu verzichten bzw. die Halterung des Heizleiters 2ʹ etwa in der Mitte der Windungshöhe vorzusehen.It can be seen in particular from FIG. 2 that the rail 11 has openings 31 and webs 32 on the side facing away from the heating conductor 2ʹ. This configuration improves, in particular, the compensation of the different thermal expansion behavior of the insulating plates 3, 9 and the rail 11. Furthermore, with a suitable arrangement of the webs 32, this arrangement can serve, with suitable installation conditions, to dispense with the second insulating plate 9 or to hold the heating conductor, if necessary 2ʹ approximately in the middle of the winding height.

Wie den Figuren 3 und 4 zu entnehmen ist weisen die Stege 32 der Halteschiene 11 zentrale Verbreiterungen 33 mit einem Durchgangsloch 34 auf. In diesen Löchern 34 kann ein entsprechender Vorsprung einer entlang der Schiene 11 verschiebbaren Halterung 41 für einen Temperaturschalter 42 einrasten (Figur 4). An den verbreiterten Stegen 32 mit den Durchbrüchen 34 kann die Halterung 41 eines Temperaturschalters 42 auch angeöst oder angepunktet werden. In diesem Falle weisen die Isolierstoffplatten 3, 9 mit den Löchern 34 fluchtende Durchbrüche 69 (Figur 1) mit größerem Radius auf, so daß das Anösen an fertigen Heizkörpern leicht erfolgen kann.As can be seen from FIGS. 3 and 4, the webs 32 of the holding rail 11 have central widenings 33 with a through hole 34. A corresponding projection of a holder 41 for a temperature switch 42 which can be displaced along the rail 11 can snap into these holes 34 (FIG. 4). The holder 41 of a temperature switch 42 can also be loosened or dotted on the widened webs 32 with the openings 34. In this case, the insulating material plates 3, 9 with the holes 34 aligned openings 69 (Figure 1) with a larger radius, so that the loosening can easily be done on finished radiators.

Eine entsprechende Halterung 41 für einen Temperaturschalter 42 ist insbesondere den Figuren 4 bis 6 entnehmbar. Die Halterung 41 weist zunächst einen die Breite der Schiene 11 überbrückenden bügelartigen Steg 43 auf, an dessen Enden die Laschen 17 der Halteschiene 11 umgreifende Laschen 44 ausgebildet sind, mittels derer die Halterung 41 an der Schiene 11 gehalten und entlang dieser verschiebbar ist. Zentral im Steg 43 ist eine Sicke 46 ausgebildet, die als Widerlager zu den Laschen 44 an der Unterseite der Halteschiene 11 bzw. im Bereich der Durchbrüche 32 der unteren Isolierplatte 14 anliegt. Mit der Sicke 46 kann die Halterung 41 nach Einstellen in der gewünschten Stellung an der Halteschiene 11, beispielsweise durch Punktschweißen oder dergleichen festgelegt werden.A corresponding holder 41 for a temperature switch 42 can be seen in particular from FIGS. 4 to 6. The bracket 41 first has the width of the rail 11 bridging bow-like web 43, at the ends of which the tabs 17 of the holding rail 11 are formed around tabs 44, by means of which the holder 41 is held on the rail 11 and is displaceable along the latter. A bead 46 is formed centrally in the web 43 and bears as an abutment to the tabs 44 on the underside of the holding rail 11 or in the region of the openings 32 of the lower insulating plate 14. With the bead 46, the holder 41 can be fixed after setting in the desired position on the holding rail 11, for example by spot welding or the like.

An einer Seite erstreckt sich vom Steg 43, im wesentlich mit diesen fluchtend ein Ansatz 47, von dem weiderum ein Flansch 48 nach oben absteht, dessen Ende 49 seitlich abgebogen ist. An diesem abgebogenen Ende 49 ist der Temperaturschalter 42 mit einem Kontakt 51 befestigt, wie angeöst. Am Steg 47 ist eine isolierende Brücke 52 isoliert gegen den Steg 47 ein Winkelteil 53 mit einem Flansch 54 befestigt. Zwischen dem Ansatz 47 und dem Flansch 54 springt ein Vorsprung 56 des Isolierteils 52 vor, durch den die mit dem Isolierteil 52 beispielsweise durch Ösen verbundenen Teile 47, 54 drehsicher gehalten werden.On one side extends from the web 43, essentially in alignment with it, a shoulder 47, from which in turn a flange 48 protrudes upward, the end 49 of which is bent laterally. At this bent end 49, the temperature switch 42 is fastened with a contact 51, as if it had been loosened. On the web 47, an insulating bridge 52 is insulated from the web 47 and an angle part 53 is fastened with a flange 54. A projection 56 of the insulating part 52 protrudes between the shoulder 47 and the flange 54, by means of which the parts 47, 54 connected to the insulating part 52, for example by eyelets, are held in a rotationally secure manner.

An einem vom Winkelteil 53 entgegen der Richtung des Ansatzes 54 aber auch des Ansatzes 49 des Teils 48 abgebogenen Flansch 57 ist das andere Ende 58 des Temperaturschalters 42 befestigt, der derart sicher gehalten wird. Mit 61 ist ein isolierendes Trägerteil des Temperaturschalters, mit 62 eine Lagerung für eine Bimetallscheibe 63, mit 64 der durch die Bimetallscheibe 63 geschaltete bewegliche Kontakt und mit 66 der aus der Kontaktlasche 58 ausgeschnittene und herausgebogene stationäre Gegenkontakt des Temperaturschalters 42 bezeichnet.The other end 58 of the temperature switch 42, which is held securely in this way, is fastened to a flange 57 which is bent away from the angle part 53 against the direction of the extension 54 but also the extension 49 of the part 48. With 61 is an insulating support part of the temperature switch, with 62 a bearing for a bimetallic disk 63, with 64 the movable contact switched by the bimetallic disk 63 and with 66 the stationary counter contact of the temperature switch 42 cut out and bent out of the contact tab 58.

Insbesondere können durch die erfindungsgemäße Ausgestaltung auch mehrere Temperaturschalter an der Halteschiene 11 hintereinander angeordnet und gegebenenfalls festgelegt werden, so daß lokale Überhitzungen, die bei einem Gerät mit nur einem Wächter, wenn sie entfernt von diesem auftreten, nicht zu einer Sicherheitsabschaltung führen würden, zuverlässig berücksichtigt werden. Es können auch mehrere Temperaturschalter in Form von Reglern vorgesehen sein. Weiter können ein Teil der Temperaturschalter Regler und ein anderer Teil Wächter sein.In particular, the configuration according to the invention also allows a plurality of temperature switches on the holding rail 11 in succession are arranged and, if necessary, fixed so that local overheating, which would not lead to a safety shutdown in a device with only one monitor, if they occur at a distance from this, is reliably taken into account. Several temperature switches in the form of controllers can also be provided. Part of the temperature switch can also be a controller and another part can be a watchdog.

Claims (12)

  1. Electric heating element (1) with a heating conductor (2') wound in meander-like manner, an approximately rectangular insulating material plate having openings (4) and interposed webs (6) and holding the heating conductor (2') on a series of bent turn ends (7) and a second, at least width-identical insulating material plate (9), the heating conductor (2') extending substantially on one side at right angles to the first insulating material plate and on the other side the held turn ends (7) are passed through the openings (4) and around the webs (6) and are fixed by the engaging second insulating material plate (9), characterized in that a support bar (11) extending substantially over the entire width of the insulating material plates (3,9) and substantially over their length engages on the second insulating material plate (9), that the support bar (11) has on either side cover plates (17) engaging round the longitudinal edges (13,14) of the superimposed insulating material plates (3,9) and fixing the same, that the cover plates (17) and support bar (11) are constructed in one piece, that the support bar (11) is made from an electrically conductive material, particularly metal and that the support bar (11) forms a return circuit for a power supply of the heating conductor (2').
  2. Heating element according to claim 1, characterized in that on one face (21) are provided connecting contacts (22,23,28) for the connection of electrical connections and the heating conductors (2') are electrically connected to the bar (11) at the other face (26).
  3. Heating element according to claims 1 or 2, characterized in that on the side remote from the cover plates (17), the bar (11) has openings (31) and webs (32).
  4. Heating element according to one of the claims 1 to 3, characterized in that a temperature switch (42) is displaceably fitted to the support bar (11).
  5. Heating element according to one of the claims 1 to 4, characterized in that cover plates (44) of a mounting support (41) for a temperature switch (42) engage round the support bar (11).
  6. Heating element according to claims 4 or 5 in conjunction with claim 3, characterized in that by means of the webs (32) of the support bar (11) the temperature switch (42) is fixed to the latter.
  7. Heating element according to claim 6, characterized in that the temperature switch (42) is fixed by means of rings.
  8. Heating element according to claims 5 or 6, characterized in that a bridge-like web (43) connecting the cover plates (44) of the temperature switch mounting support (41) engaging round the support bars (11) is provided with a central protuberance (46).
  9. Heating element according to one of the claims 4 to 8, characterized in that the temperature switch (42) is connected by two support parts (47,48,49,53,54,57) kept spaced by means of an insulating part (52,56).
  10. Heating element according to claim 9, characterized in that the two support parts (47,48,49,53,54,57) are fixed to one another in non-rotary manner.
  11. Heating element according to claim 10, characterized in that the two support parts (47,48,49,53,54,57) are ringed to the insulating part (52) and between corresponding fastening attachments (47,54) of both support parts projects an attachment (56) of the insulating part (52) corresponding to the spacing of the two attachments (47,54).
  12. Heating element according to one of the claims 9 to 11, characterized in that one of the support parts (47,48,49) is firmly connected, preferably in one piece, with the bridge-like web (43) guided on the support bar.
EP87100773A 1986-07-04 1987-01-21 Electric heating element with meander-like turns Expired - Lifetime EP0253050B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863622478 DE3622478A1 (en) 1986-07-04 1986-07-04 ELECTRIC RADIATOR WITH SEA-SHAPED WINDINGS
DE3622478 1986-07-04

Publications (2)

Publication Number Publication Date
EP0253050A1 EP0253050A1 (en) 1988-01-20
EP0253050B1 true EP0253050B1 (en) 1991-12-11

Family

ID=6304382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100773A Expired - Lifetime EP0253050B1 (en) 1986-07-04 1987-01-21 Electric heating element with meander-like turns

Country Status (3)

Country Link
US (1) US4845345A (en)
EP (1) EP0253050B1 (en)
DE (2) DE3622478A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2594248A1 (en) * 2007-07-20 2009-01-20 Mabe Canada Inc. Heater assembly
CA2763532C (en) * 2011-01-18 2015-03-31 Tutco, Inc. Two level electric resistance heater and method of use
US9386634B2 (en) * 2011-04-15 2016-07-05 Tutco, Inc. Electrical resistance heater assembly and method of use

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7503313U (en) * 1975-06-05 Siemens Ag Electric tubular heater
CH40144A (en) * 1907-07-15 1908-06-16 Therma Ag Electrical resistance and heating element
CH125907A (en) * 1927-02-26 1928-06-01 Pitton & Collombat Electric heating body.
DE1185743B (en) * 1960-03-05 1965-01-21 Eichenauer Fa Fritz Heavy-duty electric heating element
US3069522A (en) * 1960-10-07 1962-12-18 Frederick W Jamison Heater element for embedment in a mastic slab
DE1274760B (en) * 1962-10-24 1968-08-08 Eichenauer Fa Fritz Bracket for zigzag curved heating systems of heavy-duty electrical heating elements
DE1440404B2 (en) * 1962-10-24 1969-10-09 Fa. Fritz Eichenauer, 6747 Kandel Heavy-duty electric radiator
DE1258523B (en) * 1964-06-06 1968-01-11 Eichenauer Fa Fritz Heating element for bread roaster
US3808573A (en) * 1973-01-16 1974-04-30 Emerson Electric Co Electric heater assemblies
AT329702B (en) * 1974-05-14 1976-05-25 Koegler Adalbert PLATE-LIKE FLAT RADIATOR
DE2849258A1 (en) * 1978-11-14 1980-05-29 Eichenauer Fa Fritz Heater element on flat support for hair dryer - has embedded longitudinal rail with U or T=shaped cross=section with terminal and mounting rivets
JPS5628489A (en) * 1979-08-14 1981-03-20 Ube Industries Heating material and method of producing same
IT8023180V0 (en) * 1980-10-21 1980-10-21 Rica Spa PERFECTED ELECTRIC RESISTANCE.

Also Published As

Publication number Publication date
DE3622478A1 (en) 1988-01-07
US4845345A (en) 1989-07-04
DE3775126D1 (en) 1992-01-23
EP0253050A1 (en) 1988-01-20

Similar Documents

Publication Publication Date Title
DE4101290C2 (en) Electric surface heating element
DE19521913C2 (en) Double safety thermostat
EP1152639B1 (en) Electrical heating unit, particularly for liquid supports
DE2509158C3 (en) Electrical clamp
DE2408959B2 (en) Wiring harness
EP0253050B1 (en) Electric heating element with meander-like turns
EP0086316B1 (en) Plug-in contact device for the establishment of an electrical connection between two bus-bars
EP0223168A1 (en) Electrical cooking plate and device for its connection
DE2520884C3 (en) Device for applying a connecting piece made of insulating material to the two ends of the meandering area of a bimetallic strip
DE3102640C2 (en)
EP1587166B1 (en) Repartition block
DE69907264T2 (en) ELECTRIC COOKING AND TOAST UNIT AND ASSOCIATED ELECTRICAL ELEMENTS
DE2709413B2 (en)
EP0399105A2 (en) Electrical cooking plate
EP1191385A2 (en) Liquid-crystal display
EP0289707B1 (en) Electrical heating element with a tap
EP0317822B1 (en) Toaster with an electrical heating device
DE2533936A1 (en) Heating element for household appliances - has resistance material in form of grille to assist power selection during manufacture
EP2763497B1 (en) Heating element for infrared radiator
DE2515897C3 (en) Flexible electrical panel heating element
DE3042417C2 (en) Electrical tap element
EP0304906A2 (en) Connection piece for an electric cooking plate
DE102007054143A1 (en) Connecting device for connecting an electrical conductor in an electrical device comprises a clamping hoop with a region formed as an elastic compensating element in the pressing direction of a fixing element
DE3631852C1 (en) Electric heater, especially for bread roasters
DE19613328C1 (en) Instantaneous water heater for a water-heating household appliance

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): CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19880627

17Q First examination report despatched

Effective date: 19900419

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI SE

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

Ref country code: SE

Effective date: 19911211

REF Corresponds to:

Ref document number: 3775126

Country of ref document: DE

Date of ref document: 19920123

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

Ref country code: LI

Effective date: 19920131

Ref country code: CH

Effective date: 19920131

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: DR. ING. A. RACHELI & C.

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920322

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: GB

Payment date: 19950112

Year of fee payment: 9

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

Ref country code: GB

Effective date: 19960121

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

Effective date: 19960121

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

Ref country code: DE

Payment date: 19991230

Year of fee payment: 14

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

Ref country code: FR

Payment date: 20000118

Year of fee payment: 14

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: 20010928

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: 20011101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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: 20050121