EP1590989A1 - Dispositif chauffant souple - Google Patents

Dispositif chauffant souple

Info

Publication number
EP1590989A1
EP1590989A1 EP04701296A EP04701296A EP1590989A1 EP 1590989 A1 EP1590989 A1 EP 1590989A1 EP 04701296 A EP04701296 A EP 04701296A EP 04701296 A EP04701296 A EP 04701296A EP 1590989 A1 EP1590989 A1 EP 1590989A1
Authority
EP
European Patent Office
Prior art keywords
heating
cord
cable
encapsulation
connecting cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04701296A
Other languages
German (de)
English (en)
Inventor
Reinhold Wanner
Hans-Georg Gingl
Ernst Merk
Ralf KÖHLER
Ingolf Rathbeg
Werner Bader
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.)
Beurer GmbH
Original Assignee
Beurer GmbH and Co
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
Priority claimed from EP20030001466 external-priority patent/EP1331836B1/fr
Priority claimed from DE2003108724 external-priority patent/DE10308724C5/de
Application filed by Beurer GmbH and Co filed Critical Beurer GmbH and Co
Priority to EP04701296A priority Critical patent/EP1590989A1/fr
Priority claimed from PCT/EP2004/000122 external-priority patent/WO2004066676A1/fr
Publication of EP1590989A1 publication Critical patent/EP1590989A1/fr
Withdrawn legal-status Critical Current

Links

Definitions

  • the invention relates to a flexible heating device, such as a warming blanket, heating cushion or heating underblanket, with at least one heating cord arranged on a heating element, a connecting cable connected to it via externally insulated connecting means for power supply and a control circuit.
  • a flexible heating device such as a warming blanket, heating cushion or heating underblanket
  • Such a heating device is specified, for example, in DE 101 26 066 A1, a connection between a heating cord and a connecting cable in the edge region of a basic heating element, for example a ceiling, being shown.
  • a connection between a heating cord and a connecting cable in the edge region of a basic heating element for example a ceiling
  • further components of the electrical circuit can be arranged in particular in the edge region of the ceiling, such as a fuse and a display element, for example with circuitry.
  • the A rectifier arrangement can also be provided from the ends of the two heating wires of the heating cord remote from the connecting cable.
  • a control circuit has at least one on / off switch, but in one embodiment has a multi-stage switch and can also include other components.
  • heating device of this type is shown in EP 0 562 850 A2, in which the heating cord, which also has, for example, two coaxial heating conductors, is connected via two connection points to a connecting cable, in the course of which a control circuit is arranged.
  • the control circuit here has a special security system which has a rectifier device in the form of a diode which is arranged between the heating wires on the end remote from the connection-side end of the heating cord and in the control circuit has a thermally triggerable fuse.
  • the diodes arranged in series between the heating wires only allow a half-wave of the supply current to pass through, but if the heating wires are short-circuited, the negative half-wave of the heating current is also let through, which is then fed via a further rectifier device in the control circuit to a resistor arrangement which is connected to a fuse responding to temperature increase is thermally coupled and triggers when the heating wires are short-circuited.
  • the control circuit further comprises a control element in the form of a thyristor for temperature control.
  • the invention has for its object to develop a flexible heating device of the type mentioned in such a way that safe assembly and function are achieved or at least favored.
  • This object is achieved with the features of claim 1.
  • the connecting means are combined in a connecting unit which has a common carrier plate and / or a common encapsulation.
  • connection unit is arranged on the heating element and is fixed with holding means.
  • the carrier plate is designed as a circuit board with printed conductor tracks, which carries several connecting elements of the connecting means, some with an associated heating conductor and some with an associated wire of the connecting cable and - if provided - for Manufacture relevant current paths are interconnected by means of conductor tracks.
  • the heating cord has two heating conductors which are connected to one another at one end of the cord with associated wires of the connecting cable and at the other end of the cord either directly or via a rectifier arrangement incorporated in the connecting unit, then both ends of the cord can be easily connected and connected.
  • a construction which is advantageous for the assembly and the mode of operation is achieved in that a current fuse arranged in the supply circuit is accommodated in the connection unit.
  • the measures that the encapsulation is formed by casting or by means of two joined shell elements also contribute to safety.
  • the insulating material is matched to the special safety requirements for a cast or injection-molded encapsulation on the one hand and a shell version on the other, the insulation properties and measures for plug-in, or clamp or crimp connections being adapted to the higher requirements than, for example, solder connections due to the higher contact resistance are.
  • the encapsulation has at least one cord guide molded onto it for the heating cord and one molded cable guide for the connecting cable.
  • the encapsulation consists of elastic plastic material at least in the area of the cord guide (s) and / or the cable guide and is melt-resistant up to 150 ° C. as well as flame-retardant and tension-proof.
  • the measures contribute that the connecting means for inserting and clamping are designed with electrical contacting of one or both heating cord ends and that a cover part on its side facing the connecting means has formations which interact with the connecting means in such a way that the clamping during The shell elements are joined together.
  • a stable, tension-resistant arrangement is supported in that the connection unit is fixed on the heating element by fixing the assigned connection cable end and / or at least one cord end.
  • FIG. 1 is a flexible heating device with a connecting unit between the heating cord and the connecting cable in a schematic representation
  • FIG. 2 shows a schematic representation of a carrier plate of a connecting unit
  • FIG. 3 shows an exemplary embodiment of a connecting section of a heating cord
  • FIG. 5 shows a perspective, open view of a further exemplary embodiment for a connecting unit
  • FIG. 1 schematically shows a flexible heating device 1 with a meandering heating element 3, for example a blanket, a pillow or a lower bed, a heating cord 3, a connecting cable 5 that can be connected to a supply voltage by means of a plug 7, in the course of which a control circuit 6 is arranged, as well as a connecting unit 4 arranged between the heating cord 3 and the connecting cable 5 in an edge region of the base element 2.
  • a meandering heating element 3 for example a blanket, a pillow or a lower bed
  • a heating cord 3 that can be connected to a supply voltage by means of a plug 7, in the course of which a control circuit 6 is arranged, as well as a connecting unit 4 arranged between the heating cord 3 and the connecting cable 5 in an edge region of the base element 2.
  • FIG. 4B shows, different heat zones can be formed on the base element 2 by means of at least one further heating cord 3 ', which is suitably on the Basic element 2 is laid.
  • the heating cord 3, 3 'advantageously has two heating conductors made of resistance wire, which are arranged in the heating cord 3, 3' insulated from one another, as can be seen, for example, from FIG. 2.
  • An advantageous embodiment known per se is that the one heating wire as the outer conductor 3.2 and the other heating conductor as the inner conductor 3.4 coaxially separated from one another and electrically isolated from one another by means of intermediate insulation 3.3 and insulated from the outside by means of outer insulation 3.1 and wound in a coil shape in the heating cord 3 , 3 'run.
  • the inner conductor 3.4 is wound on an insulating core.
  • the cord end 3.5 and the cord end 3.6 facing away from it are both electrically connected and mechanically fixed on a carrier plate 4.1 of the connecting unit 4, connections in particular also being made to the inner conductor 3.4j and the outer conductor 3.2.
  • a direct contact can be made between the outer conductor 3.2 and the inner conductor 3.4, in particular at the cord end 3.6 facing away from the connecting cable 5 or, as shown in FIG. 2, a rectifier device in the form of one or more semiconductor diodes 8 can be arranged.
  • Other or further electrical components such as those shown in the two documents mentioned at the beginning, can also be connected between the outer conductor 3.2 and the inner conductor 3.4 on the carrier plate 4.1.
  • the cord end 3.5 on the connecting cable side is connected with the outer conductor 3.2 and the inner conductor 3.4 to assigned wires 5.1, 5.2 of the connecting cable.
  • a fuse element 9 for example a current fuse, can be arranged on the carrier plate 4.1 between a wire, for example 5.1, and a heating conductor, for example the outer conductor 3.2.
  • the connection between the wires 5.1, 5.2 of the connecting cable 5 and the outer conductor 3.2 and inner conductor 3.4 is established via conductor tracks 4.12 of the carrier plate 4.1 arranged on the side facing away from the component side.
  • Wire pins, retaining lugs, retaining tabs or crimp connectors or the like can be arranged and connected as connecting means 10 (cf. also FIGS.
  • the components 8, 9 and also the contacting of the wires 5.1, 5.2 of the connecting cable 5 with the outer conductor 3.2 or inner conductor 3.4 can be made, as known per se from the PCB assembly. Clamping, crimping, soldering or welding connections can be used for contacting.
  • the connecting cable 5 is secured to the base element 2 with tensile strength by means of fixations 2.1, for example sewn or welded, in order to avoid tearing off the connecting cable 5 or the connecting unit 4.
  • the heating cords 3, 3 ' can also be fastened on the base element 2 and the connecting unit 4 can also be additionally fixed on the base element 2.
  • Another design option is that the mechanical connection between the base element 2 and the connection unit 4 is made with a clip.
  • the clip has several functions, namely that it can relieve the strain on the connecting cable 5, fix the connection unit 4 and thus also relieve the strain on the heating cord (s) 3, 3 ', kink protection of the connecting cable 5 with various embodiments, for example a trumpet-shaped outlet opening. Cable grommet or the like., A cover of the cable outlet from the base element 2 or as a carrier for user information, logos, technical data, type plate or the like.
  • the clip can be made of different materials, for example plastic, metal or a combination thereof.
  • latching hooks are provided which simultaneously serve as push-through tools through at least one cover layer of the base element 2 and can also cause the connecting unit 4 to latch.
  • the clip is designed, for example, so that self-locking can take place by means of two identical parts, which are arranged rotated by 180 ° to one another.
  • the clip can consist of one or more parts, which include, for example, a kind of film hinge that allows kinking.
  • the rectifier elements 8 and possibly further electrical components can cooperate with further electrical circuit components of the control circuit 6 to form a temperature control circuit and / or a safety system, for example as set out in the documents mentioned at the beginning.
  • Fig. 3 shows a special embodiment of a connecting section of the heating cord 3, 3 '.
  • a coupling element 3.7 is placed on the heating cord end 3.5, 3.6, for example by a type of screw connection or clamping, which has windows cut free on one side, one of which has the outer conductor 3.2 while the outer insulation 3.1 is omitted and the other with the outer conductor 3.1 being omitted, the outer conductor. 3.2 and the intermediate insulation 3.3 releases the inner conductor 3.4.
  • an electrical contact in the manner of a coaxial connector can be produced on a complementarily designed counterpart (not shown).
  • the coupling element 3.7 can be accommodated in a connecting unit 4, specifically in an encapsulation 4.3 thereof, as is shown in FIGS. 4A, 4B and 5.
  • a connecting unit 4 specifically in an encapsulation 4.3 thereof, as is shown in FIGS. 4A, 4B and 5.
  • the coupling element 3.7 or plug element of the heating cord 3 is inserted once into the counterpart or connecting element and (not detachably) latched, or in which the connecting cable 5 is equipped with one or more corresponding counter elements can be removed in order to wash the heating device, for example in a machine.
  • one side of the plug element could already short-circuit the heating cords! 3 form between the inner conductor 3.4 and the outer conductor 3.2.
  • the connecting element then acts as a strain relief for the heating cord 3, 3 '.
  • the encapsulation 4.2 shown in FIGS. 4A and 4B is produced by means of casting technology, the carrier plate 4.1 with the mounting parts arranged thereon, ie components, connecting cable ends and cord ends 3.5, 3.6, being completely encapsulated by means of a heat-resistant, voltage-resistant and fire-resistant, flame-retardant insulating compound , which is advantageously also washable and waterproof.
  • the melt resistance is at least 150 ° C, advantageously above 160 ° C or 170 ° C, so that it can withstand the temperatures that occur. Resistance to melting over 100 ° C is guaranteed. If, despite the reliable contacting measures, contact resistance occurs and leads to heating, a hazard is avoided by means of the encapsulation 4.2.
  • sealing cord guides 4.21 or a cable guide 4.22 for the cord ends 3.5, 3.6 and the connecting cable 5 are integrally formed, which provide secure kink protection for the heating cord 3, 3 'or the connecting cable 5 result.
  • FIG. 4B shows a connection unit 4 for a heating device 1 with two heating cords 3, 3 ', it being possible for the connections, as shown in FIG. 2, to be designed in duplicate. Different connection types can also be selected for the two heating cords 3, 3 ', as described in connection with FIG. 2. For example, it is conceivable to operate a heating cord via a temperature control circuit with a safety system, such as in the prior art mentioned above or related developments known per se, and to operate the other heating cord via a simpler control circuit. In any case, the connection unit 4 permits a secure, unambiguous connection of the heating cords 3, 3 'to the connecting cable 5, if necessary via the components used.
  • Fig. 5 shows a further embodiment of a connecting unit 4.
  • the encapsulation 4.3 is composed of two shell parts which can be connected tightly to one another, namely a lower part 4.31 and a cover part 4.38 (see FIG. 7), the holding elements 4.33, for example in the form of Have blind holes and cooperating holding counter-elements in the form of projections adapted to them. Clamping or snap-in connections or sealing adhesive or welded connections are also suitable.
  • the structure can advantageously also be formed from a two-component plastic with a harder core section and a softer, sealing coating.
  • a middle section of the encapsulation 4.3 accommodates the carrier plate 4.1, while a cord guide 4.34 molded onto the middle part with strain reliefs 4.35 serves for feeding the heating cords 3, 3 'and a cable guide 4.32 molded onto the middle part results in a secure feeding of the connecting cable 5.
  • the carrier plate 4.1 To uniquely position the carrier plate 4.1, it has laterally positioning elements 4.1 1 in the form of recesses, into which adapted positioning counter-elements 4.36 arranged in the middle part of the encapsulation 4.3 engage.
  • the cable guide 4.32 for the connecting cable 5 has a clamping part 4.37.
  • Clamping contacting connecting means 10 are also provided on the carrier plate 4.1 for the cord ends 3.5, 3.6 or their outer conductors 3.2 and inner conductors 3.4.
  • a securing element 9 and / or a rectifier device 8 can also be arranged on the carrier plate 4.1 according to the previous exemplary embodiments.
  • FIG. 6 and 7 show different examples of configurations of the connecting means 10 and their contacting.
  • punched and bent sheet metal parts are the first connecting element 10.1 on the inner conductor 3.4 of the Heating cord 3, 3 ', as a second connection element 10.2 on the outer conductor 3.2 and as a further connection element 10.3 contacted with a component, for example the fuse element 9 or the semiconductor device in the form of a diode 8, the second connection element 10.2 and the further connection element 10.3 on the same Sheet metal part are arranged.
  • the first connecting element 10.1 and the second connecting element 10.2 can be integrally connected to one another via a conductive bridge 10.4. 6
  • the outer conductor 3.2 and the inner conductor 3.4 are inserted into an initially open clamp connection, which is then bent while the connections of the component 8 or 9 are clamped in a kind of cutting connection on the further connecting element 10.3.
  • the clamp connection can be produced in that, for example, the cover part 4.38 of the encapsulation 4.3 has recesses which interact with the free ends of the connecting elements 10.1, 10.2 and which narrow and with their flanks when the cover part is pressed on 4.38 compress the free ends of the connecting elements 10.1, 10.2.
  • 7a) shows the still open and FIG. 7b) shows the pressed-on state of the cover part 4.38, while FIG. 7c) shows the pressed-on state without the connecting means 10 being inserted.
  • the connecting means 10 can be placed on a carrier plate 4.1 or without such directly in the encapsulation 4.3. Soldered or welded connections generally place less demands on the constructive solutions of the contact connections.
  • connection unit can be soldered or welded onto a circuit board or metallically conductive parts.
  • solder pins can be provided in different configurations for wrapping and soldering only for fastening the resistance wires.
  • the winding pins (soldering nails) could be rectangular or pre-assembled in another form in a circuit board or in plastic.
  • the advantage of rectangular soldering pins compared to round pins is that the resistance wire digs in at the sharp edges and can therefore slip less until the connection is soldered.
  • the connecting unit 4 can also be designed to accommodate further or other components, for example it can include further circuit parts of a safety device (for example described in more detail in DE 102 1 1 142 A1) (further diodes, temperature fuse, these resistance elements which are triggered by heat), temperature control elements, Timers, temperature monitoring elements or a switching unit or combination of such parts included.
  • a safety device for example described in more detail in DE 102 1 1 142 A1
  • temperature control elements for example described in more detail in DE 102 1 1 142 A1
  • Timers for example described in more detail in DE 102 1 1 142 A1
  • temperature monitoring elements for example described in more detail in DE 102 1 1 142 A1

Landscapes

  • Central Heating Systems (AREA)

Abstract

L'invention concerne un dispositif chauffant souple (1), tel qu'une couverture chauffante, un coussin chauffant ou une couette chauffante, comportant au moins un fil chauffant (3, 3') placé sur un élément de base chauffant (2), un câble de connexion (5) servant à l'alimentation en énergie et raccordé au fil chauffant par l'intermédiaire de moyens de raccordement (10) isolés vers l'extérieur, ainsi qu'un circuit de commande (6). L'objectif de l'invention est de créer un dispositif chauffant fiable. A cet effet, les moyens de raccordement (10) sont regroupés dans une unité de raccordement (4) qui présente une plaque de support (4.1) commune et/ou un encapsulage (4. 3) commun.
EP04701296A 2003-01-23 2004-01-10 Dispositif chauffant souple Withdrawn EP1590989A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04701296A EP1590989A1 (fr) 2003-01-23 2004-01-10 Dispositif chauffant souple

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP20030001466 EP1331836B1 (fr) 2002-01-25 2003-01-23 Dispositif à chauffer chauffable électriquement possédant un corps de chauffe flexible
EP03001466 2003-01-23
DE10308724 2003-02-28
DE2003108724 DE10308724C5 (de) 2003-01-23 2003-02-28 Schmiegsame Wärmevorrichtung
EP04701296A EP1590989A1 (fr) 2003-01-23 2004-01-10 Dispositif chauffant souple
PCT/EP2004/000122 WO2004066676A1 (fr) 2003-01-23 2004-01-10 Dispositif chauffant souple

Publications (1)

Publication Number Publication Date
EP1590989A1 true EP1590989A1 (fr) 2005-11-02

Family

ID=35052475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04701296A Withdrawn EP1590989A1 (fr) 2003-01-23 2004-01-10 Dispositif chauffant souple

Country Status (1)

Country Link
EP (1) EP1590989A1 (fr)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004066676A1 *

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