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EP1333702B1 - Electric blanket with electrical resistive heating - Google Patents

Electric blanket with electrical resistive heating Download PDF

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Publication number
EP1333702B1
EP1333702B1 EP03450001A EP03450001A EP1333702B1 EP 1333702 B1 EP1333702 B1 EP 1333702B1 EP 03450001 A EP03450001 A EP 03450001A EP 03450001 A EP03450001 A EP 03450001A EP 1333702 B1 EP1333702 B1 EP 1333702B1
Authority
EP
European Patent Office
Prior art keywords
heating
heating wires
electric blanket
laid
textile fabric
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
EP03450001A
Other languages
German (de)
French (fr)
Other versions
EP1333702A3 (en
EP1333702A2 (en
EP1333702B8 (en
Inventor
Gerhard Leukermoser
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.)
Regina Schlaftkomfort GmbH
Original Assignee
Regina Schlaftkomfort 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 Regina Schlaftkomfort GmbH filed Critical Regina Schlaftkomfort GmbH
Publication of EP1333702A2 publication Critical patent/EP1333702A2/en
Publication of EP1333702A3 publication Critical patent/EP1333702A3/en
Publication of EP1333702B1 publication Critical patent/EP1333702B1/en
Application granted granted Critical
Publication of EP1333702B8 publication Critical patent/EP1333702B8/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C21/00—Attachments for beds, e.g. sheet holders or bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
    • A47C21/04—Devices for ventilating, cooling or heating
    • A47C21/048—Devices for ventilating, cooling or heating for 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
    • 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
    • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the invention relates to a heating mat with an electrical resistance heating in the heating wires are laid in a surrounding with textile fabric insert core.
  • Known heating mats also called Infrarotkurmatten be operated with electric power and installed, for example, in beds or placed on mattresses or incorporated in electric blankets.
  • a conductive copper insert for example in the form of woven copper strands.
  • a bed insert which, for shielding a sleeper from electrical fields, comprises a shielding layer of a needled non-metallic fiber nonwoven web having a grounding terminal, a minimum portion of which is electrically conductive.
  • this electrically conductive shielding layer which is arranged on at least one side of a bed insert between the insert core and that textile fabric on which the sleeper lies, largely shields the sleeper from electrostatic fields, these known inserts can not adequately shield them from those caused by the heating wires achieve generated electromagnetic alternating fields.
  • the invention is therefore the object of a heating mat of the type described in such a way that with simple constructive Means an effective shielding of a sleeper to electromagnetic alternating fields, in particular caused by the heating wires magnetic alternating fields, can be achieved.
  • the invention achieves the stated object by virtue of the fact that the heating wires are laid bifilarly with currents flowing counter to one another and that at least one electrically conductive shielding layer connected to a grounding conductor of a power supply cable is arranged between the textile fabric and the insert core.
  • the bifilar laying of the heating wires ie the two-sided or two-fold laying of the heating wires next to one another, the currents flowing through the heating wires flow towards each other, as a result of which induction effects between the individual heating wires almost cancel each other out.
  • the heating wires are distributed, for example meandering over the entire heating mat.
  • an electrically conductive shielding layer is arranged between the textile fabric and the insert core. This electrically conductive shielding layer is to ensure an advantageous grounding of the nonwoven fabric connected to a grounding line of the power supply cable for the resistance heating, which at the same time takes place with the connection of the heating blanket to a grounded power plug grounding of the fleece.
  • the heating wires are laid twisted together.
  • a heating mat 1 has an electrical resistance heater 2 in which heating wires 3 are laid in a core 5 surrounded by textile fabric 4.
  • the individual heating wires 3 are laid bifilar, which means that in each two juxtaposed heating wires 3, the currents flow counter to each other, whereby induction effects cancel each other almost completely.
  • a power cord 6 is connected by means of a plug 7 and a switch 8 to the heating wires 3, the heating current flows first in a heating wire 3 through the meandered resistance heater 2 until the end of the resistance heater 2 and then back in the opposite direction.
  • only a heating wire 3 must be provided, which consists of two equal length, twisted together, together at one end and connected to the power supply at the other end heating wires 3.
  • an electrically conductive shield layer 9 is arranged, which is connected to the ground terminal 10 of the power cable 6. In order to introduce no interference fields in the heating mat 1 through the power cable 6, this is also shielded at least in the area of the heating mat 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)

Description

Die Erfindung betrifft eine Heizmatte mit einer elektrischen Widerstandsheizung bei der Heizdrähte in einem mit textilem Gewebe umgebenen Einlagekern verlegt sind.The invention relates to a heating mat with an electrical resistance heating in the heating wires are laid in a surrounding with textile fabric insert core.

Bekannte Heizmatten, auch Infrarotkurmatten genannt, werden mit elektrischem Strom betrieben und beispielsweise in Betten verbaut bzw. auf Matratzen aufgelegt oder in Heizdecken eingearbeitet. Zur Vermeidung von elektrostatischen Aufladungen von Ober- und Unterbetten ist es bekannt ( EP 00 653 16 A1 ), diese Betteile mit einer leitenden Kupfereinlage beispielsweise in Form von eingewebten Kupferlitzen zu versehen. Aus der AT 4 215 U ist ebenfalls eine Betteinlage bekannt, die zur Abschirmung eines Schläfers gegenüber elektrischen Feldern eine Schirmschicht aus einem genadelten, mit einem Erdungsanschluß versehenen Vlies aus nicht metallischen Fasern besteht, von denen ein Mindestanteil elektrisch leitend ist. Diese elektrisch leitende Schirmschicht, die zumindest auf einer Seite einer Betteinlage zwischen dem Einlagekern und jenem textilem Gewebe angeordnet wird auf dem der Schläfer liegt, schirmt den Schläfer zwar weitestgehend gegenüber elektrostatischen Feldern ab, doch können diese bekannten Einlagen keine ausreichende Abschirmung gegenüber den durch die Heizdrähte verursachten elektromagnetischen Wechselfeldern erzielen.Known heating mats, also called Infrarotkurmatten be operated with electric power and installed, for example, in beds or placed on mattresses or incorporated in electric blankets. To avoid electrostatic charging of upper and lower beds, it is known ( EP 00 653 16 A1 ), to provide these parts with a conductive copper insert, for example in the form of woven copper strands. From the AT 4 215 U There is also known a bed insert which, for shielding a sleeper from electrical fields, comprises a shielding layer of a needled non-metallic fiber nonwoven web having a grounding terminal, a minimum portion of which is electrically conductive. Although this electrically conductive shielding layer, which is arranged on at least one side of a bed insert between the insert core and that textile fabric on which the sleeper lies, largely shields the sleeper from electrostatic fields, these known inserts can not adequately shield them from those caused by the heating wires achieve generated electromagnetic alternating fields.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Heizmatte der eingangs geschilderten Art so auszugestalten, daß mit einfachen konstruktiven Mitteln eine wirksame Abschirmung eines Schläfers gegenüber elektromagnetischen Wechselfeldern, insbesondere vor durch die Heizdrähte verursachten magnetischen Wechselfeldern, erreicht werden kann.The invention is therefore the object of a heating mat of the type described in such a way that with simple constructive Means an effective shielding of a sleeper to electromagnetic alternating fields, in particular caused by the heating wires magnetic alternating fields, can be achieved.

Die Erfindung löst die gestellte Aufgabe dadurch, dass die Heizdrähte bifilar mit einander entgegen fließenden Strömen verlegt sind und dass zwischen dem textilen Gewebe und dem Einlagekern wenigstens eine an eine Erdungsleitung eines Stromversorgungskabels angeschlossene, elektrisch leitende Schirmschicht angeordnet ist. Durch das bifilare Verlegen der Heizdrähte, also dem zweifädigen bzw. zweifachen Verlegen der Heizdrähte nebeneinander, fließen die durch die Heizdrähte fließenden Ströme einander entgegen, wodurch sich Induktionswirkungen zwischen den einzelnen Heizdrähten gegenseitig nahezu aufheben. Um eine gleichmäßige Wärmeabgabe der Heizmatte zu erreichen, sind die Heizdrähte beispielsweise mäanderförmig über die gesamte Heizmatte verteilt.The invention achieves the stated object by virtue of the fact that the heating wires are laid bifilarly with currents flowing counter to one another and that at least one electrically conductive shielding layer connected to a grounding conductor of a power supply cable is arranged between the textile fabric and the insert core. As a result of the bifilar laying of the heating wires, ie the two-sided or two-fold laying of the heating wires next to one another, the currents flowing through the heating wires flow towards each other, as a result of which induction effects between the individual heating wires almost cancel each other out. In order to achieve a uniform heat dissipation of the heating mat, the heating wires are distributed, for example meandering over the entire heating mat.

Um mit der erfindungsgemäßen Heizmatte nicht nur elektromagnetische Wechselfelder vermeiden bzw. verhindern zu können, sondern auch eine elektrostatische Aufladung von Ober- und Unterbetten zu unterbinden, ist zwischen dem textilen Gewebe und dem Einlagekern eine elektrisch leitende Schirmschicht angeordnet. Diese elektrisch leitende Schirmschicht ist um eine vorteilhafte Erdung des Vlieses zu gewährleisten an eine Erdungsleitung des Stromversorgungskabels für die Widerstandsheizung angeschlossen, wodurch mit dem Anschließen der Heizdecke an einen geerdeten Netzstecker zugleich eine Erdung des Vlieses erfolgt.In order not only to be able to avoid or prevent alternating electromagnetic fields with the heating mat according to the invention, but also to prevent electrostatic charging of upper and lower beds, an electrically conductive shielding layer is arranged between the textile fabric and the insert core. This electrically conductive shielding layer is to ensure an advantageous grounding of the nonwoven fabric connected to a grounding line of the power supply cable for the resistance heating, which at the same time takes place with the connection of the heating blanket to a grounded power plug grounding of the fleece.

Um die ohnehin schon geringen magnetischen Wechselfelder noch weiter zu verringern und um das Verlegen der Heizdrähte zu vereinfachen bzw. um einen stets gleichbleibenden geringen Abstand zwischen den vom Strom in einander entgegengesetzter Richtung durchflossenen Heizdrähten sicherzustellen, sind die Heizdrähte miteinander verdrillt verlegt.In order to reduce the already low magnetic alternating fields even further and to simplify the laying of the heating wires or to ensure an always consistent small distance between the current flowing through in opposite directions heating wires, the heating wires are laid twisted together.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen

Fig. 1
eine erfindungsgemäße Heizmatte in teilgeschnittener Draufsicht
Fig. 2
die Heizmatte im Schnitt nach der Linie II-II aus Fig. 1.
In the drawing, the subject invention is shown, for example. Show it
Fig. 1
a heating mat according to the invention in a partially sectioned plan view
Fig. 2
the heating mat in section along the line II-II Fig. 1 ,

Eine erfindungsgemäße Heizmatte 1 besitzt eine elektrische Widerstandsheizung 2 bei der Heizdrähte 3 in einem mit textilem Gewebe 4 umgebenen Einlagekern 5 verlegt sind. Die einzelnen Heizdrähte 3 sind bifilar verlegt, was bedeutet, daß in je zwei nebeneinander verlegten Heizdrähten 3 die Ströme einander entgegen fließen, wodurch sich Induktionswirkungen gegenseitig nahezu vollständig aufheben. Wird ein Netzkabel 6 mittels eines Steckers 7 und eines Schalters 8 an die Heizdrähte 3 angeschlossen, so fließt der Heizstrom zuerst in einem Heizdraht 3 durch die mäanderförmig verlegte Widerstandsheizung 2 bis zum Ende der Widerstandsheizung 2 und anschließend in entgegengesetzter Richtung zurück. Somit muß gemäß der Erfindung lediglich ein Heizdraht 3 vorgesehen werden, der aus zwei gleichlangen, miteinander verdrillten, an einem Ende miteinander zusammengeschlossenen und am anderen Ende an die Stromversorgung angeschlossenen Heizdrähten 3 besteht.A heating mat 1 according to the invention has an electrical resistance heater 2 in which heating wires 3 are laid in a core 5 surrounded by textile fabric 4. The individual heating wires 3 are laid bifilar, which means that in each two juxtaposed heating wires 3, the currents flow counter to each other, whereby induction effects cancel each other almost completely. If a power cord 6 is connected by means of a plug 7 and a switch 8 to the heating wires 3, the heating current flows first in a heating wire 3 through the meandered resistance heater 2 until the end of the resistance heater 2 and then back in the opposite direction. Thus, according to the invention, only a heating wire 3 must be provided, which consists of two equal length, twisted together, together at one end and connected to the power supply at the other end heating wires 3.

Zur zusätzlichen Abschirmung elektrostatischer Felder bzw. zur Dämpfung etwaiger noch vorhandener elektromagnetischer Restfelder ist zwischen dem textilen Gewebe 4 und dem Einlagekern 5 eine elektrisch leitende Schirmschicht 9 angeordnet, die an den Erdungsanschluß 10 des Stromkabels 6 angeschlossen ist. Um durch das Stromkabel 6 keine Störfelder in die Heizmatte 1 einzubringen, ist dieses zumindest im Bereich der Heizmatte 1 ebenfalls abgeschirmt ausgebildet.For additional shielding of electrostatic fields or for damping any remaining electromagnetic residual fields between the textile fabric 4 and the insert core 5, an electrically conductive shield layer 9 is arranged, which is connected to the ground terminal 10 of the power cable 6. In order to introduce no interference fields in the heating mat 1 through the power cable 6, this is also shielded at least in the area of the heating mat 1.

Claims (2)

  1. Electric blanket (1) having an electrical resistance heating arrangement (2) in which heating wires (3) are laid in an inlay core surrounded by textile fabric (4), characterised in that the heating wires (3) are laid in a bifilar manner with currents flowing in opposition to each other and that on both sides of the inlay core (5) between the textile fabric (4) and the inlay core (5) at least one electrically conductive shielding layer (9) attached to an earth line of a power supply cable (6) is disposed.
  2. Electric blanket as claimed in claim 1, characterised in that the heating wires (3) are laid twisted together.
EP03450001A 2002-01-31 2003-01-02 Electric blanket with electrical resistive heating Expired - Lifetime EP1333702B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0005702U AT5812U1 (en) 2002-01-31 2002-01-31 HEATING MAT WITH AN ELECTRIC RESISTANT HEATING
AT572002U 2002-01-31

Publications (4)

Publication Number Publication Date
EP1333702A2 EP1333702A2 (en) 2003-08-06
EP1333702A3 EP1333702A3 (en) 2006-10-04
EP1333702B1 true EP1333702B1 (en) 2012-06-13
EP1333702B8 EP1333702B8 (en) 2012-07-18

Family

ID=3480377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03450001A Expired - Lifetime EP1333702B8 (en) 2002-01-31 2003-01-02 Electric blanket with electrical resistive heating

Country Status (2)

Country Link
EP (1) EP1333702B8 (en)
AT (1) AT5812U1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007019891A1 (en) * 2007-04-27 2008-11-06 Conti Temic Microelectronic Gmbh Heating device for heating e.g. vehicle seating, has sets of wire-shaped electrical heating elements, where element from one set is supplied with current opposite to heating element of another set, where elements are arranged in parallel
US20150366003A1 (en) * 2014-06-16 2015-12-17 Sceiba Intelligent Fashion Co., Ltd. Electric heating module
DE102017012508B4 (en) 2017-06-02 2024-12-05 DIGEL STICKTECH GmbH & Co. KG infrared heating
DE102017112206A1 (en) * 2017-06-02 2018-12-06 DIGEL STICKTECH GmbH & Co. KG Infrared heating with structured front wall
DE102017112205B4 (en) * 2017-06-02 2024-09-26 DIGEL STICKTECH GmbH & Co. KG Infrared heating
DE102018117996B4 (en) 2018-07-25 2024-12-12 DIGEL STICKTECH GmbH & Co. KG Infrared heating with a flexible carrier
DE102019202543A1 (en) * 2019-02-26 2020-08-27 Eberspächer Catem Gmbh & Co. Kg PTC heating element and electrical heating device with such a PTC heating element
DE102019009191B4 (en) 2019-06-18 2022-09-29 Christian Niestolik Clearing blade for a snow plow

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0827364A3 (en) * 1996-08-01 1998-08-05 Friedrich Wilhelm Heating cable or mat with minimalised magnetic field
AT4215U1 (en) * 2000-03-16 2001-04-25 Leukermoser Regina BED INSERT

Also Published As

Publication number Publication date
EP1333702A3 (en) 2006-10-04
EP1333702A2 (en) 2003-08-06
EP1333702B8 (en) 2012-07-18
AT5812U1 (en) 2002-12-27

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