EP0383152A2 - Appareil de chauffage électrique souple - Google Patents

Appareil de chauffage électrique souple Download PDF

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Publication number
EP0383152A2
EP0383152A2 EP90102288A EP90102288A EP0383152A2 EP 0383152 A2 EP0383152 A2 EP 0383152A2 EP 90102288 A EP90102288 A EP 90102288A EP 90102288 A EP90102288 A EP 90102288A EP 0383152 A2 EP0383152 A2 EP 0383152A2
Authority
EP
European Patent Office
Prior art keywords
conductor
electric heating
heating device
heating
heated
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Withdrawn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
EP90102288A
Other languages
German (de)
English (en)
Other versions
EP0383152A3 (fr
Inventor
Klaus Dipl.-Ing. Wetzel
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.)
Wilhelm Wetzel and Co GmbH
Original Assignee
Wilhelm Wetzel and Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wilhelm Wetzel and Co GmbH filed Critical Wilhelm Wetzel and Co GmbH
Publication of EP0383152A2 publication Critical patent/EP0383152A2/fr
Publication of EP0383152A3 publication Critical patent/EP0383152A3/fr
Withdrawn legal-status Critical Current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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
    • 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
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • 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
    • H05B2203/026—Heaters specially adapted for floor heating
    • 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
    • H05B2203/029—Heaters specially adapted for seat warmers

Definitions

  • the invention relates to a flexible electric heating device with the features of the preamble of claim 1.
  • Supple electric heaters are used to apply heat to the human body. They are used, for example, as heated underblankets to create comfortable temperatures in bed, even when the bedroom is not heated, but also as a warm blanket. They also serve to make lying on waterbeds comfortable by ensuring a comfortable temperature of the support surface. They continue to be used as heating pads, foot heating or for heating car seats. They can also be used as carpet heating. In the medical field, they serve as pads for examination couches and massage benches; in medical heat treatment, they can be used, for example, as neck and neck heating pads or face heating pads. They are used as relaxation aids in the form of warming mats in yoga.
  • Such supple electric heating devices are known for example from DE-GM 88 06 248.
  • a heating cord is guided in a meandering shape under a surface to be heated.
  • the temperature which is perceived as pleasant can be set by means of a temperature preselector and is maintained by a temperature control device.
  • the heating cord has an outgoing conductor and a return conductor, the resistance value of the outgoing conductor being equal to the resistance value of the return conductor.
  • the forward conductor and return conductor are preferably arranged running parallel to one another, but it is also conceivable that the return conductor is wound separately over the forward conductor by an insulating layer.
  • the heating cord has an insulating core on which the heating conductor (s) are wound.
  • interference fields electromagnetic type can be significantly reduced.
  • Another improvement is achieved by shielding purely electrical interference fields. This can be achieved, for example, by covering the surface to be heated with a film which contains metallic components.
  • the film can be a textile with electrically conductive fibers, it can be designed as a wire mesh or it can also be a metal-coated carrier.
  • the power supply is advantageously carried out via a so-called bio-cable, which is a shielded cable with twisted wires.
  • bio-cable which is a shielded cable with twisted wires.
  • it is furthermore expedient to provide a circuit breaker which quickly switches off the power supply.
  • the flexible electric heating device consists of a carrier (1) made of textile material, plastic or the like, which can also serve as a covering for the heating electronics.
  • a heating cord (2) is arranged on the carrier (1) or in the sheathing, which is removed from the carrier (1) via a connecting piece (3). is brought out.
  • the heating cord (2) is arranged in a meandering manner on the carrier (1), so that the surface of the carrier (1) is heated as uniformly as possible.
  • An electrical supply line (4) which can be connected to the electrical network via a mains plug (7), supplies the electric heating device with current.
  • a temperature control device (5) with a switch (6) for preselecting the heating temperature is provided in the feed line (4).
  • a shielded cable with twisted wires can be used as the supply line (4) in order to exclude the interference from the supply line as far as possible. It is also useful to provide a circuit breaker, not shown here, which quickly cuts off the power supply when electrical breakdowns occur in the electric heating device.
  • the heating cord (2) has an outgoing conductor and a return conductor.
  • Figure 2 shows an embodiment for the heating cord for installation in the electric heating device according to the invention.
  • Forward conductor (8) and return conductor (9) are arranged parallel to one another and are enclosed by a common insulation (14).
  • the insulation (14) tapers between the outgoing conductor (10) and the return conductor (11) and forms a web-shaped section, which makes it possible for the outgoing conductor (8) and return conductor (9) to be tilted slightly against one another, so that the heating cord forms a has some flexibility perpendicular to the direction of the ladder.
  • Both the forward conductor (8) and the return conductor (9) have a core (10, 11) made of electrically insulating material, around which the heating conductor (12, 13) is wound.
  • the heating conductor (12) for the outgoing conductor (8) from a different material than the heating conductor (13) for the return conductor (9).
  • the outgoing conductor (8) or the return conductor (9) can be used as a temperature sensor, so that then for the corresponding conductor A nickel alloy is expediently used, while the other conductor can consist of a copper wire or the like.
  • the resistance value of the outgoing conductor (8) is equal to the resistance value of the return conductor (9). If current flows through the heating conductors, electromagnetic fields are formed around the outgoing conductors (8) and return conductors (9), the strength of which is identical at each point in space, but the direction of which depends on the direction of the current flowing through the conductors. If the outgoing conductor (8) and return conductor (9) are guided in parallel, the electromagnetic fields between the outgoing conductor (8) and return conductor (9) cancel each other almost completely and are at least weakened in the outer area. This leads to a considerable reduction in the interference fields that occur in electrical heating devices.
  • the resistance values can be matched by a suitable choice of the winding density of the heating conductors.
  • FIG 3 shows a further embodiment of a heating cord.
  • the outgoing conductor (16) has a core (18) made of insulating material, around which the heating conductor (21) is wound.
  • the outgoing conductor (16) is enclosed by insulation (19) which at the same time forms the carrier for the return conductor (17).
  • the heating conductor (22) is in turn wound on the insulation (19), the windings being less dense than in the outgoing conductor (16), in order to achieve a match of the resistance values again.
  • the entire arrangement is encased by an insulating layer (20). Due to the different direction of current flow in the outgoing conductor (16) and return conductor (17), those generated by the outgoing conductor (16) and return conductor (17) interfere electromagnetic fields again in such a way that they weaken each other. Therefore, the interference field influence is reduced with this arrangement.
  • FIG. 4 shows an electrical heating device according to the present invention, in which not only electromagnetic fields but also electrical fields are shielded.
  • the carrier (1) is arranged on a cushion (26) made of soft insulating material.
  • the carrier (1) or a suitable covering accommodates the heating cord arrangement.
  • the heating cords can be constructed in accordance with the embodiments in FIGS. 2 and 3.
  • a film (24) is provided over the surface (25) to be heated, which serves to shield the electrical fields. It can consist of a textile material that contains threads of electrically conductive material, which are arranged in the textile, for example in the form of a net.
  • a wire mesh is also suitable.
  • a good shielding effect is also achieved if the film is designed as a carrier coated with metal on one side.
  • the interference fields are measured over the contact surface (23) of the electric heating device by means of a probe and compared with the values for already known electric heating devices, the interference fields are weakened by the order of magnitude of ten. It has even been found that the interference field influence is less in the area of the support surface (23) than in the spatial surroundings of the electric heating device, so that the electric heating device according to the invention even partially absorbs the background radiation that is always present in the room.
  • An electrical heating device can also be used very advantageously for heating the support surface in waterbeds, in which case the flat heating element is arranged between two layers of the foil containing metallic components.

Landscapes

  • Resistance Heating (AREA)
EP19900102288 1989-02-11 1990-02-06 Appareil de chauffage électrique souple Withdrawn EP0383152A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8901603U 1989-02-11
DE8901603U DE8901603U1 (fr) 1989-02-11 1989-02-11

Publications (2)

Publication Number Publication Date
EP0383152A2 true EP0383152A2 (fr) 1990-08-22
EP0383152A3 EP0383152A3 (fr) 1992-03-04

Family

ID=6835938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900102288 Withdrawn EP0383152A3 (fr) 1989-02-11 1990-02-06 Appareil de chauffage électrique souple

Country Status (2)

Country Link
EP (1) EP0383152A3 (fr)
DE (1) DE8901603U1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998020711A1 (fr) * 1996-11-06 1998-05-14 Beckmann Versand Gmbh Dispositif de chauffage electrique
EP0858244A2 (fr) * 1997-02-06 1998-08-12 Alcatel Câble chauffant dépourvu champ
EP0873043A1 (fr) 1997-03-21 1998-10-21 Micro Weiss Electronics Conducteur de chauffage à fil de capteur intégral et régulateur amélioré pour le-même
US5908573A (en) * 1997-12-30 1999-06-01 Bask Technologies Llc Electric floor heating system
US6303905B1 (en) 2000-08-25 2001-10-16 Bask Technologies Llc Heating element construction for floor warming systems
DE10308724B4 (de) * 2003-01-23 2006-03-09 Beurer Gmbh & Co Schmiegsame Wärmevorrichtung
GB2447748A (en) * 2007-03-16 2008-09-24 George Frederick Warner An underfloor heating element
CN103453572A (zh) * 2013-08-23 2013-12-18 济南喜莱盈家俱制造有限公司 一种碳纤维水暖装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8901603U1 (fr) * 1989-02-11 1989-03-30 Wilhelm Wetzel Gmbh & Co., 4019 Monheim, De
DE4038167B4 (de) * 1989-12-15 2005-10-20 Bernhard Rall Anordnung zur Beheizung von flexiblen Matten, Textilien oder dergleichen
US5081339A (en) * 1990-06-01 1992-01-14 Sunbeam Corporation Water bed heater
DE29613341U1 (de) * 1996-08-01 1996-09-19 Wilhelm Friedrich Stromleiter und mit diesem verbindbarer Stecker
DE10126066B4 (de) * 2001-05-28 2004-11-18 Beurer Gmbh & Co Wärmevorrichtung mit einem schmiegsamen Heizkörper
US7196295B2 (en) * 2003-11-21 2007-03-27 Watlow Electric Manufacturing Company Two-wire layered heater system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE566962C (de) * 1931-03-29 1932-12-24 Hans Weber Verfahren zur Herstellung von Heizkissen durch Befestigung der Heizdraehte auf einerStofflage und gemeinsamer Herausfuehrung der Heizdrahtenden
DE715880C (de) * 1938-03-22 1942-01-08 Norddeutsche App Bau Anstalt G Schmiegsames, elektrisches Waermegeraet, insbesondere Heizkissen
US3222497A (en) * 1963-04-30 1965-12-07 Gen Electric Electrically heated bedcover
US3758747A (en) * 1970-10-19 1973-09-11 C Rohr Electric mattress
GB2134730A (en) * 1983-02-02 1984-08-15 Kannegiesser Martin Heating device for appliances for gluing sheet-like textile articles
FR2590433A1 (fr) * 1985-11-20 1987-05-22 Degois Cie Ets Element chauffant de securite destine a etre utilise, notamment dans une couverture chauffante
FR2611107A1 (fr) * 1987-02-17 1988-08-19 Wesseltoft Per As Dispositif electrique de chauffage en forme de plaque
DE8901603U1 (fr) * 1989-02-11 1989-03-30 Wilhelm Wetzel Gmbh & Co., 4019 Monheim, De
EP0334824A2 (fr) * 1988-03-25 1989-09-27 Calesco Foil AB Résistance chauffante électrique plate

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE566962C (de) * 1931-03-29 1932-12-24 Hans Weber Verfahren zur Herstellung von Heizkissen durch Befestigung der Heizdraehte auf einerStofflage und gemeinsamer Herausfuehrung der Heizdrahtenden
DE715880C (de) * 1938-03-22 1942-01-08 Norddeutsche App Bau Anstalt G Schmiegsames, elektrisches Waermegeraet, insbesondere Heizkissen
US3222497A (en) * 1963-04-30 1965-12-07 Gen Electric Electrically heated bedcover
US3758747A (en) * 1970-10-19 1973-09-11 C Rohr Electric mattress
GB2134730A (en) * 1983-02-02 1984-08-15 Kannegiesser Martin Heating device for appliances for gluing sheet-like textile articles
FR2590433A1 (fr) * 1985-11-20 1987-05-22 Degois Cie Ets Element chauffant de securite destine a etre utilise, notamment dans une couverture chauffante
FR2611107A1 (fr) * 1987-02-17 1988-08-19 Wesseltoft Per As Dispositif electrique de chauffage en forme de plaque
EP0334824A2 (fr) * 1988-03-25 1989-09-27 Calesco Foil AB Résistance chauffante électrique plate
DE8901603U1 (fr) * 1989-02-11 1989-03-30 Wilhelm Wetzel Gmbh & Co., 4019 Monheim, De

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998020711A1 (fr) * 1996-11-06 1998-05-14 Beckmann Versand Gmbh Dispositif de chauffage electrique
EP0858244A2 (fr) * 1997-02-06 1998-08-12 Alcatel Câble chauffant dépourvu champ
EP0858244A3 (fr) * 1997-02-06 1998-09-30 Alcatel Câble chauffant dépourvu champ
EP0873043A1 (fr) 1997-03-21 1998-10-21 Micro Weiss Electronics Conducteur de chauffage à fil de capteur intégral et régulateur amélioré pour le-même
US5908573A (en) * 1997-12-30 1999-06-01 Bask Technologies Llc Electric floor heating system
US6303905B1 (en) 2000-08-25 2001-10-16 Bask Technologies Llc Heating element construction for floor warming systems
DE10308724B4 (de) * 2003-01-23 2006-03-09 Beurer Gmbh & Co Schmiegsame Wärmevorrichtung
DE10308724C5 (de) * 2003-01-23 2013-03-14 Beurer Gmbh Schmiegsame Wärmevorrichtung
GB2447748A (en) * 2007-03-16 2008-09-24 George Frederick Warner An underfloor heating element
CN103453572A (zh) * 2013-08-23 2013-12-18 济南喜莱盈家俱制造有限公司 一种碳纤维水暖装置

Also Published As

Publication number Publication date
EP0383152A3 (fr) 1992-03-04
DE8901603U1 (fr) 1989-03-30

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