EP0368776A1 - Heizkabel, insbesondere für das Strahlungsheizen - Google Patents

Heizkabel, insbesondere für das Strahlungsheizen Download PDF

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Publication number
EP0368776A1
EP0368776A1 EP89460036A EP89460036A EP0368776A1 EP 0368776 A1 EP0368776 A1 EP 0368776A1 EP 89460036 A EP89460036 A EP 89460036A EP 89460036 A EP89460036 A EP 89460036A EP 0368776 A1 EP0368776 A1 EP 0368776A1
Authority
EP
European Patent Office
Prior art keywords
heating
cable
insulating layer
sheath
electrically insulating
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Withdrawn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
EP89460036A
Other languages
English (en)
French (fr)
Inventor
Pierre Emile Deleage
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0368776A1 publication Critical patent/EP0368776A1/de
Withdrawn legal-status Critical Current

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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
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables

Definitions

  • the present invention relates to a heating cable and, more particularly, a heating cable intended for direct heating by radiation.
  • Underfloor heating using electric heating cables must currently meet the following standards in France: - CSTB unified technical document 65/7, and - NFC 32.330 standard relating to the manufacture of heating cables and heating elements entitled "heating equipment by heating cables with metallic coating, intended to be incorporated into the walls of buildings.”
  • Direct heating by radiation is of increasing interest. Indeed, the ground constitutes a very effective emission surface.
  • the qualification of "direct” heating implies that the thermal inertia of the heat emitter is weak, that is to say that screeds or floating concrete slabs of small thickness are used placed on a layer of thermally insulating material, the heating cable being installed between the screed and the insulating layer.
  • An object of the present invention is to provide a heating cable without a metallic braid, which considerably reduces its cost and allows it to be shaped more easily, the cable being sufficiently robust and rigid to withstand, without being deformed, the passage of operators. . This prevents the cable from entering the underlying insulating layer.
  • Another object of the invention consists in providing such a preformed heating cable so as to reduce its exposure time.
  • a heating cable comprising electrically resistant wires, around which is provided an electrically insulating layer around which is provided a sheath made of rigid thermosplastic material with high flexural strength and high hardness.
  • the sheath can be made flexible by raising its temperature to a sufficient value, but which is lower than the temperature of melting or substantial softening of the electrically insulating layer.
  • sensitive softening we mean the point where the wires resistant can take an eccentric position in the layer.
  • the sheath material is part of the polypropylene, polyvinyl chloride (PVC), polyethylene group, provided that it is rigid.
  • the electrically insulating layer is made of crosslinked polyethylene.
  • the cable is, at the outlet of the extruder, preformed to present undulations.
  • the cable of Fig. 1 comprises, in the center, three resistive electrical wires 1, around the three wires 1, an electrically insulating layer 2 and, around it, a mechanically resistant sheath 3.
  • the material of the sheath 2 can be of the cross-linked polyethylene type, the thickness of which is preferably 1.2 mm.
  • the sheath 3 is made of rigid plastic, of great resistance to bending and of great hardness.
  • plastics which can be used for this purpose, mention may be made of rigid polypropylenes, rigid polyvinyl chloride or even rigid polyethylene, etc.
  • the thickness of the sheath 3 must be sufficient to ensure the rigidity of the cable.
  • the material of the sheath 3 must be thermoplastic for reasons that we will see later. The temperature at which the material of the sheath 3 becomes plastic must be low enough not to melt or deform the material of the sheath 2.
  • Fig. 2 shows a frame made with the cable of FIG. 1.
  • This frame is made up of a succession of parallel rectilinear sections 4 and elbows 5 so as to form a single uninterrupted but wavy cable.
  • the cable length between the midpoints A and B of two consecutive bends, also called a half-turn, is for example 1 m.
  • the distance between two adjacent sections is for example 0.10 m, which corresponds to a heating power of 150 W / m2.
  • Fig. 3 the same grid has been shown as in FIG. 2, but stretched, that is to say that the sections 4 have been set aside, to form a regular zig-zag line. Stretching is possible because the material of the outer sheath 3 is, although rigid, relatively elastic. Of course, in the stretched position, the sections 4 must be hung on the layer of underlying insulating material. When the midpoints of two successive sections 4 is 0.25 m, the heat output is reduced to 60 W / m2.
  • Fig. 4 shows how a frame, such as that of FIG. 2, can be used to evenly heat a floor surface. Since, the entry E, the frame is posed in the direction of arrow F1 until point C where it is necessary to return in the direction of arrow F2, opposite to that of arrow F1. At point C, during installation, the cable is heated, for example using a hot air device, until the sheath 3 is sufficiently plastic to be able to unfold the initial elbow and make it straight. Likewise, at point D, the heating operation is repeated in order to continue laying the weft according to arrow F3, and so on until the outlet S. Of course, if the cable wefts are to be stretched as shown in Fig. 3, first the assembly of FIG. 4, which is then stretched. It will be observed that the cable of the invention thus conditioned is laid flat without difficulty, which is not true for a cable that is unwound from a reel.
  • Fig. 5 shows that, to hang the cable of FIG. 1 in the insulating layer 6, one can very simply use plastic hooks or jumpers 7 with tips of fir branches.
  • the cable thus hung on the layer 6, which can have a thickness of 3 to 6 cm, for example, is poured on the whole a concrete screed reinforced with a thickness of 5 cm, for example.
  • the insulating layer 6 can be made of closed-cell expanded polystyrene, for example.
  • a shield can be provided between layer 2 and sheath 3 in the form of a braid made of copper wires.

Landscapes

  • Resistance Heating (AREA)
  • Central Heating Systems (AREA)
EP89460036A 1988-11-09 1989-10-26 Heizkabel, insbesondere für das Strahlungsheizen Withdrawn EP0368776A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8814854 1988-11-09
FR8814854A FR2638931A1 (fr) 1988-11-09 1988-11-09 Cable chauffant, plus particulierement destine au chauffage direct par rayonnement

Publications (1)

Publication Number Publication Date
EP0368776A1 true EP0368776A1 (de) 1990-05-16

Family

ID=9371881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89460036A Withdrawn EP0368776A1 (de) 1988-11-09 1989-10-26 Heizkabel, insbesondere für das Strahlungsheizen

Country Status (2)

Country Link
EP (1) EP0368776A1 (de)
FR (1) FR2638931A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110040026A (zh) * 2018-01-15 2019-07-23 保时捷股份公司 对具有电驱动的车辆的快速充电站的充电线缆的温度控制

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1175784A (fr) * 1956-05-25 1959-04-01 Thomson Houston Comp Francaise Câble électrique chauffant à gaine extérieure non métallique
DE1565641A1 (de) * 1966-11-05 1970-02-12 Wagner Kabelwerk Elektrischer Heizkoerper und Verfahren zu seiner Herstellung
FR2223930A1 (en) * 1973-03-27 1974-10-25 Fabric Cables Electr Cie Gl Electric cable for ground heating installation - has conductive metal core with preset linear resistance in insulating sleeve
FR2279299A2 (fr) * 1974-06-05 1976-02-13 Deleage & Fils Ets Procede pour la realisation de grilles, ou reseaux chauffants prefabriques
BE843434A (fr) * 1976-06-25 1976-10-18 Cable pour installation de chauffage electrique integre
US4286376A (en) * 1975-01-20 1981-09-01 Raychem Corporation Method of making heater cable of self-limiting conductive extrudates

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1175784A (fr) * 1956-05-25 1959-04-01 Thomson Houston Comp Francaise Câble électrique chauffant à gaine extérieure non métallique
DE1565641A1 (de) * 1966-11-05 1970-02-12 Wagner Kabelwerk Elektrischer Heizkoerper und Verfahren zu seiner Herstellung
FR2223930A1 (en) * 1973-03-27 1974-10-25 Fabric Cables Electr Cie Gl Electric cable for ground heating installation - has conductive metal core with preset linear resistance in insulating sleeve
FR2279299A2 (fr) * 1974-06-05 1976-02-13 Deleage & Fils Ets Procede pour la realisation de grilles, ou reseaux chauffants prefabriques
US4286376A (en) * 1975-01-20 1981-09-01 Raychem Corporation Method of making heater cable of self-limiting conductive extrudates
BE843434A (fr) * 1976-06-25 1976-10-18 Cable pour installation de chauffage electrique integre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110040026A (zh) * 2018-01-15 2019-07-23 保时捷股份公司 对具有电驱动的车辆的快速充电站的充电线缆的温度控制

Also Published As

Publication number Publication date
FR2638931A1 (fr) 1990-05-11

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