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DE29610436U1 - Magnetic field-free heating pad (electric blanket) - Google Patents

Magnetic field-free heating pad (electric blanket)

Info

Publication number
DE29610436U1
DE29610436U1 DE29610436U DE29610436U DE29610436U1 DE 29610436 U1 DE29610436 U1 DE 29610436U1 DE 29610436 U DE29610436 U DE 29610436U DE 29610436 U DE29610436 U DE 29610436U DE 29610436 U1 DE29610436 U1 DE 29610436U1
Authority
DE
Germany
Prior art keywords
heating
conductor
heating pad
blanket
pad
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
DE29610436U
Other languages
German (de)
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
Priority to DE29610436U priority Critical patent/DE29610436U1/en
Publication of DE29610436U1 publication Critical patent/DE29610436U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/007—Heating or cooling appliances for medical or therapeutic treatment of the human body characterised by electric heating
    • A61F2007/0071—Heating or cooling appliances for medical or therapeutic treatment of the human body characterised by electric heating using a resistor, e.g. near the spot to be heated
    • 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

Landscapes

  • General Induction Heating (AREA)
  • Surface Heating Bodies (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Description

BeschreibungDescription

Bei der üblichen Bauart wird der Heizleiter mäanderförmig auf der inneren Fläche des Heizkissens (der Heizdecke) durch Einnähen in ein Textilmaterial fixiert. Der Heizleiter besteht selbst üblicherweise aus einem gewendelten Heizdraht der auf einem isolierenden Textilfaden von der Dicke von etwa 1 Millimeter einlagig aufgewickelt ist.In the usual design, the heating conductor is fixed in a meandering shape on the inner surface of the heating pad (the heating blanket) by sewing it into a textile material. The heating conductor itself usually consists of a coiled heating wire that is wound in a single layer on an insulating textile thread with a thickness of around 1 millimeter.

Beim Betrieb tritt neben der gewünschten Erhitzung ein elektromagnetisches Feld auf, das von der Stärke des elektrischen Stromes und von der geometrische Konfiguration des Heizleiters abhängt. Dieses Magnetfeld stellt das Problem dar» da es gesundheitliche Risiken für den anwendenden, meistens kranken oder gebrechlichen Menschen beinhalten kann. Die mögliche Gefährlichkeit von Magnetfeldern wird seit Jahren diskutiert» Neuerdings haben Versuche mit Ratten eine krebserzeugende Wirkung von Magnetfeldern festgestellt (Universität Hannover, 1996). Bei Heizkissen oder Heizdecken scheint das Risiko einer Gefährdung deshalb besonders groß zu sein, weil sie bei der Anwendung gewöhnlich direkt auf dem Körper aufliegen.During operation, in addition to the desired heating, an electromagnetic field is generated which depends on the strength of the electric current and the geometric configuration of the heating conductor. This magnetic field is the problem because it can pose health risks to the person using the device, who is usually sick or frail. The possible dangers of magnetic fields have been discussed for years. Recently, tests with rats have shown that magnetic fields have a carcinogenic effect (University of Hanover, 1996). The risk of danger seems to be particularly high with heating pads or heating blankets because they usually lie directly on the body when used.

Dieses Problem wird mit dem Schutzanspruch gelöst» da es die Erzeugung von Magnetfeldern minimieren kann. Dazu wird dafür gesorgt» daß jedem stromdurchflossenen Leiter im Inneren des Heizkissens (der Heizdecke) ein zweiter Leiter nahe ist, dessen Strom entgegengesetzt fließt» wodurch sich die beiden Magnetfelder in Näherung aufheben. Insgesamt kann dadurch das Magnetfeld des Heizkissens (der Heizdecke) nahezu beseitigt werden.This problem is solved by the protection claim because it can minimize the generation of magnetic fields. To do this, it is ensured that each current-carrying conductor inside the heating pad (the heating blanket) is close to a second conductor whose current flows in the opposite direction, whereby the two magnetic fields approximately cancel each other out. Overall, the magnetic field of the heating pad (the heating blanket) can be almost eliminated.

BeispieleExamples

1) In der üblichen Bauart besteht der Heizleiter aus einem gewendelten Heizdraht (um eine gewisse Biegsamkeit zu erreichen). Er kann als eine einlagig gewickelte Spule—mit Millimeterdurchmesser aufgefaßt werden. Der Heizdraht wird, in diesem Beispielfall» gemäß des Schutzanspruchs, bifilar gewickelt, wie dies auch bei Draht-Meßwiderständen genutzt werden kann um die Selbstinduktion klein zu halten. D.h. der Heizdraht wird in der Hälfte seiner Gesamtlänge geknickt und dann in Spulenform gewickelt. Der Heizleiter, der nun aus dieser bifilar gewickelten Spule besteht, kann verschieden ausgeführt sein kann. Z.B. kann er als zweilagige Spule hergestellt werden, bei der die obere Lage gegen die untere isoliert ist und die untere Lage die 'Hinleitung*, die obere die 'Rückleitung' des Stromes bewerkstelligt, Die Dicke des so entstandenen magnetfeldfreien Heizleiters wird die gleiche Größenordnung von etwa 1 Millimeter Durchmesser haben können, wie die konventionelle Form. Am üblichen Aufbau des Heizkissens (der Heizdecke) braucht sonst nichts verändert werden.1) In the usual design, the heating conductor consists of a coiled heating wire (in order to achieve a certain flexibility). It can be viewed as a single-layer wound coil with a millimeter diameter. In this example, the heating wire is wound bifilarly in accordance with the protection claim, as can also be used with wire measuring resistors in order to keep the self-induction low. This means that the heating wire is bent at half its total length and then wound into a coil shape. The heating conductor, which now consists of this bifilar wound coil, can be designed in different ways. For example, it can be manufactured as a two-layer coil, in which the upper layer is insulated from the lower one and the lower layer carries the current 'forward line' and the upper layer carries the current 'return line'. The thickness of the magnetic field-free heating conductor thus created can have the same order of magnitude of about 1 millimeter diameter as the conventional form. Nothing else needs to be changed in the usual structure of the heating pad (the electric blanket).

2) Anstatt des Heizdrahtes wie in Beispiel 1, wird der Heizleiter, der aus dem in üblicher Form gewendelten Heizdraht besteht, in der Mitte geknickt und dann, wie üblich, schlangenförmig in dem Textil des Heizkissens (der Heizdecke) fixiert. Durch die gegenläufigen elektrischen Ströme wird hier ebenfalls das Magnetfeld wesentlich reduziert.2) Instead of the heating wire as in example 1, the heating conductor, which consists of the heating wire coiled in the usual way, is bent in the middle and then, as usual, fixed in the fabric of the heating pad (the heating blanket) in a snake-like shape. The magnetic field is also significantly reduced here by the counter-current electrical currents.

3) Das Heizkissen (die Heizdecke) besteht aus zwei identischen Innenteilen von Heizkissen (Heizdecken) üblicher Bauart. Diese werden so aufeinander gelegt, daß die Heizleitungen und3) The heating pad (heating blanket) consists of two identical inner parts of heating pads (heating blankets) of conventional design. These are placed on top of each other in such a way that the heating lines and

Zuleitungen genau übereinander liegen. Dann polt man den Strömanschluß des einen Heizkissenteils verglichen mit dem des anderen Heizkissenteils um. Die gemäß des Schutzanspruchs gegenläufigen Ströme der in Serie oder parallel geschalteten- Teile liefern dann insgesamt ein fast magnetfeldfreies Heizkissen (Heizdecke).Supply lines are positioned exactly on top of each other. Then the polarity of the current connection of one part of the heating pad is reversed compared to that of the other part of the heating pad. The opposing currents of the parts connected in series or parallel, according to the protection claim, then produce a heating pad (heating blanket) that is almost free of magnetic fields.

Bemerkung: Auf die nicht relevanten. Teile wie z. B, die Vorrichtungen zur Regulierung der Heizleistung, oder die -", Veränderung des Widerstandswertes in Beispiel 3 wurde nicht eingegangen,Note: The irrelevant parts such as the devices for regulating the heating power or the -", change in the resistance value in Example 3 were not discussed.

Claims (5)

[Flle:ANM\KO6901 A1.doc] Anspruch^ * 5fl.09.86 .1 .**. .*·.." 29610436.1 · ; · · · ; | · '···"* Roland König " "' » " Ansprüche[Flle:ANM\KO6901 A1.doc] Claim^ * 5fl.09.86 .1 .**. .*·.." 29610436.1 · ; · · · ; | · '···"* Roland König " "' » " Claims 1. Heizkissen oder -decke zur Erwärmung des menschlichen Körpers mit Hilfe eines stromdurchf lossenen,. wärmeerzeugenden Heizleiters, der sich im Inneren des Heizkissens oder der Heizdecke befindet,1. Heating pad or blanket for heating the human body using a current-carrying, heat-generating heating conductor located inside the heating pad or blanket, dadurch gekennzeichnet, daßcharacterized in that sich in der Nähe eines Leiterteils ein anderes Leiterteil befindet; undthere is another conductor part near one conductor part; and die Richtung des Stromflusses in dem anderen Leiterteil derart ist, daß sie dem Strom im ersten Leiterteil entgegengesetzt gerichtet ist.the direction of current flow in the other conductor part is such that it is opposite to the current in the first conductor part. 2. Heizkissen oder -decke nach Anspruch 1, dadurch gekenn-0 zeichnet, daß der Heizleiter aus einem gewendelten Heizdraht besteht der als eine bifilar gewickelte Spule ausgebildet ist.2. Heating pad or blanket according to claim 1, characterized in that the heating conductor consists of a coiled heating wire which is designed as a bifilar wound coil. Heizkissen oder -decke nach Anspruch 2, dadurch gekennzeichnet, daß die bifilare Spule als zweilagige Spule ausgebildet ist, bei der die untere Lage dem Hinleiter und die obere Lage dem, gegensinnig zur unteren Lage gewickelten, Rückleiter entspricht, wobei die beiden Lagen elektrisch voneinander isoliert sind.Heating pad or blanket according to claim 2, characterized in that the bifilar coil is designed as a two-layer coil, in which the lower layer corresponds to the forward conductor and the upper layer to the return conductor wound in the opposite direction to the lower layer, the two layers being electrically insulated from one another. 4. Heizkissen oder -decke nach Anspruch I1 dadurch gekennzeichnet, daß der gesamte Heizleiter der Länge nach nahe der Mitte geknickt ist, so daß die eine Hälfte das eine Leiterteil und die andere Hälfte das andere Leiterteil darstellt.4. Heating pad or blanket according to claim 1 1 , characterized in that the entire heating conductor is bent lengthwise near the middle, so that one half represents one conductor part and the other half represents the other conductor part. [File:ANM\KO6901 A1.doc] Ansprüche,* *3O.0efe6 ·1 .*'. .*·..·* 29610436.1 J j · ' j j · · *··· j" RolandKönig *··* ··**··[File:ANM\KO6901 A1.doc] Claims,* *3O.0efe6 ·1 .*'. .*·..·* 29610436.1 J j · ' jj · · *··· j" RolandKönig *··* ··**·· 5. Heizkissen oder -decke nach Anspruch 1, dadurch gekennzeichnet, daß 5. Heating pad or blanket according to claim 1, characterized in that zwei identische Innenteile von Heizkissen oder -decken nach dem Oberbegriff des Anspruchs 1 isoliert aufeinandergelegt und fixiert sind, so daß sich entsprechende Leitungen decken; undtwo identical inner parts of heating pads or blankets according to the preamble of claim 1 are placed on top of each other in an insulated manner and fixed so that corresponding lines cover each other; and der Stromanschluß des einen Innenteils im Vergleich zn dem des anderen Innenteils umgepolt ist.the power connection of one internal part is reversed compared to that of the other internal part.
DE29610436U 1996-06-14 1996-06-14 Magnetic field-free heating pad (electric blanket) Expired - Lifetime DE29610436U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29610436U DE29610436U1 (en) 1996-06-14 1996-06-14 Magnetic field-free heating pad (electric blanket)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29610436U DE29610436U1 (en) 1996-06-14 1996-06-14 Magnetic field-free heating pad (electric blanket)

Publications (1)

Publication Number Publication Date
DE29610436U1 true DE29610436U1 (en) 1996-11-07

Family

ID=8025185

Family Applications (1)

Application Number Title Priority Date Filing Date
DE29610436U Expired - Lifetime DE29610436U1 (en) 1996-06-14 1996-06-14 Magnetic field-free heating pad (electric blanket)

Country Status (1)

Country Link
DE (1) DE29610436U1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873043A1 (en) * 1997-03-21 1998-10-21 Micro Weiss Electronics Heater wire with integral sensor wire and improved controller for same
WO2001072249A1 (en) * 2000-03-31 2001-10-04 Http-Hypothermia Therapy Ltd. A heating device for heating a patient's body
WO2003107721A1 (en) * 2002-06-01 2003-12-24 Http-Hypothermia Therapy Ltd. Electrical heating device, particularly for heating a patient body
US6891136B2 (en) 2002-06-18 2005-05-10 Http-Hypothermia Therapy Ltd. Electrical heating device
WO2020069687A1 (en) 2018-10-02 2020-04-09 I.G. Bauerhin Gmbh Magnetic field-reducing flat heating element for a motor vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873043A1 (en) * 1997-03-21 1998-10-21 Micro Weiss Electronics Heater wire with integral sensor wire and improved controller for same
WO2001072249A1 (en) * 2000-03-31 2001-10-04 Http-Hypothermia Therapy Ltd. A heating device for heating a patient's body
US7709770B2 (en) 2000-03-31 2010-05-04 HTTP—Hypothermia Therapy Ltd. Heating device for heating a patient's body
WO2003107721A1 (en) * 2002-06-01 2003-12-24 Http-Hypothermia Therapy Ltd. Electrical heating device, particularly for heating a patient body
US6891136B2 (en) 2002-06-18 2005-05-10 Http-Hypothermia Therapy Ltd. Electrical heating device
US7329843B2 (en) 2002-06-18 2008-02-12 Http-Hypothermia Therapy Ltd. Electrical heating device particularly for heating a patient body
WO2020069687A1 (en) 2018-10-02 2020-04-09 I.G. Bauerhin Gmbh Magnetic field-reducing flat heating element for a motor vehicle

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Legal Events

Date Code Title Description
R086 Non-binding declaration of licensing interest
R207 Utility model specification

Effective date: 19961219

R156 Lapse of ip right after 3 years

Effective date: 20000503