EP3769584A1 - Anordnung von litzen-heizelementen und verfahren zur begrenzung von magnetischen und elektromagnetischen feldern - Google Patents
Anordnung von litzen-heizelementen und verfahren zur begrenzung von magnetischen und elektromagnetischen feldernInfo
- Publication number
- EP3769584A1 EP3769584A1 EP19712979.4A EP19712979A EP3769584A1 EP 3769584 A1 EP3769584 A1 EP 3769584A1 EP 19712979 A EP19712979 A EP 19712979A EP 3769584 A1 EP3769584 A1 EP 3769584A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- heating element
- predetermined
- wire
- sections
- 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.)
- Pending
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 [2D] plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater flexible, e.g. heating nets or webs
-
- 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
-
- 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 an arrangement and a method for generating heat on a predetermined heating surface of a component, by means of at least one wire-shaped
- Heating element which is arranged on or in a carrier element of the component, wherein for the given heating surface, a desired heating power at a predetermined
- Operating voltage is achieved with a predetermined current.
- Seat heaters with wire-shaped heating elements are now among the most popular features of vehicles. Seat heaters are now regarded not only as additional comfort equipment, but as standard equipment.
- the increasing electrification of automobiles and the constant advancing displacement of the classic internal combustion engine also eliminates the use of waste heat in the passenger compartment.
- the waste heat of a battery and the electric motors is too low, so as to provide the passenger compartment with sufficient heat. This means that more and more electrically powered components must be used to generate heat in vehicles, which in turn leads to an increase in the electromagnetic fields.
- Shielding material or additional electronic control devices are not taken into account.
- the magnetic field is a field of electromagnetic energy. Everywhere where electricity flows, creates a magnetic field, as in seat heaters, where
- a backrest or a seat part which are to be heated components.
- the object of a stranded component heating is to electrically heat the seat part or the backrest.
- the document DE 10 2007 019 891 A1 has already set itself the task of creating a heating device and a corresponding method for heating a device of a vehicle, in particular a seat, a steering wheel, an exterior mirror or a window pane, which makes it possible with negligible minimal additional costs and also a negligible effort to heat the devices mentioned and thereby reduce the electromagnetic radiation. It is provided to arrange at least one first wire-shaped heating element of a first group and at least one second heating element of a second group of heating elements, preferably of the same construction, this second heating element of the second group being in the opposite direction to the first Heating element of the first group of heating elements is energized. These two oppositely energized heating elements are preferably arranged axially parallel and closely adjacent to each other or one above the other, so that they have a bifilar arrangement of
- the heating elements can be designed as individual heating wires or as a heating line in which two or more heating wires are firmly connected together with an insulator.
- the heating elements can also as
- heating mats, heating foils or heating coatings are performed, wherein the power supply to the heating mats, heating foils or heating layers and the arrangement of the heating mats, heating foils or heating layers are matched to each other so that the heating elements mutually bifilar arrangements, resulting in the electromagnetic emissions of heating mats, heating foils or heating layers weaken or compensate each other.
- additional line lengths are disadvantageously required in this solution to achieve the compensation effect.
- a bifilar installation works only in the two - dimensional plane, because one with some distance to the bifilar laying of the
- Heating wires measured electromagnetic field caused by the superposition of the currents a distance-dependent other field.
- a bifilar installation in a seat portion or backrest portion of a vehicle seat is not efficient because the distance between a passenger for built-in seat heating is so large that another, so to speak mixed electromagnetic field is effective.
- the invention is based on the object, a reduction of the magnetic radiation of the heating elements used in a vehicle in strand technology for compliance with limits of exposure to variable electrical and magnetic and
- the directive ICNIRP is considered, which is to be implemented while maintaining the full range of comfort and functionality of the component heaters formed from the heating elements.
- the object is that the safety and durability of a component heating formed from at least one heating element are not reduced, and in addition the production costs do not increase significantly.
- the starting point of the invention is the arrangement of at least one wire-shaped
- the desired heating power is generated by arranging at least two heating element sections on or in a carrier element, wherein the at least two heating element sections are connected to one another via a parallel circuit, and each of the heating element sections is switched to a partial current intensity, wherein the sum of the partial current strengths of the Schuelementabbalde the predetermined current corresponds, whereby the measured in each case by a predeterminable amount reduced value of the electromagnetic fields of each of the at least two wire-shaped heating elements in
- the at least two heating element sections have an equal length or different lengths, the respective length being selected such that the respective measured reduced value of the electromagnetic fields of each of the at least two wire-shaped heating elements compared to the previous maximum value of the single wire-shaped heating element is reduced by the predetermined amount.
- the partial current strengths of each of the Wienelementabitese depending on the number of Thompsonelementabitese and / or their length is less than the current of the single wire-shaped heating element.
- the user of this invention will determine the substream strengths of the heater sections in FIG.
- the arrangement of the heating element sections is optimized by determining the number of heating element sections and / or determining their length such that the value of the magnetic fields of each of the heating element sections which is reduced compared to the previous maximum value does not exceed a predefinable limit value of a maximum permissible magnetic field ,
- the arrangement is characterized in that the arrangement of the heating element sections is optimized by determining the number of heating element sections and / or determining their length such that the limit value in each of the heating element sections is undershot by a predeterminable percentage.
- the predetermined limit of the maximum permissible magnetic field is undershot by the predetermined percentage, so that a safety threshold or a safety range between the maximum permissible limit of the magnetic field and the undershooted by the predetermined percentage maximum permissible limit of the magnetic field is effected.
- the starting point of the inventive method for generating heat on a given heating surface of a component is that at least one wire-shaped heating element is arranged on or in a carrier element of the component, wherein in operation of the wire-shaped heating element for the given heating surface, a desired heating power at a predetermined Operating voltage is achieved with a predetermined current.
- the desired heating power is generated by arranging at least two heating element sections on or in a carrier element, the at least two heating element sections being connected in parallel, and each of the
- Partial current strengths of the Schuelementabitese the predetermined current whereby the measured in each case by a predetermined amount reduced value of the electromagnetic fields of each of the at least two wire-shaped heating elements is reduced, the reduction considered compared to a previous maximum value of the electromagnetic field of a single wire-shaped heating element under the condition is that the only wire-shaped heating element and the at least two Schuelementabitese are operated on or in a carrier element, taking into account the same predetermined heating surface and the same desired heating power and the same operating voltage.
- Figure 1 is a classic strand heating for heating a seat part and / or a
- FIG. 2 shows a strand heating according to the invention for heating the seat part and / or the backrest with a plurality of heating strands arranged per heating field;
- Figure 3 shows the classic strand heating according to Figure 1 in a representational
- Figure 4 shows the strand heating according to the invention in a according to Figure 2 in a
- heald heaters have hitherto been used for heating a component
- This heating strand H is energized in the conventional design per heating field, for example, with a current IH of 4A.
- the surface of the carrier element 100 corresponds to the heating surface A.
- Carrier element 100 is part of a component, in particular a backrest and / or a seat part of a vehicle seat and arranged below the cover or below the cover and a lamination of the seat part and / or the back, to name just two of the possible arrangement options.
- Shortening the conductor reduces the magnetic field. In short, the longer the conductor through which flows, the larger the electromagnetic field.
- these measures are carried out in combination, so that the object of the present invention is achieved by at least one of the measures or by both measures.
- FIG. 2 shows an example which is used for further detailed explanation of FIG
- Invention serves.
- the existing strand length according to FIG. 1 is divided into heating element sections HA; n> 1 divided.
- heating element sections HA; n 4 arranged.
- the electromagnetic fields B associated with each of the heater sections HA are given by the
- heating element sections HA are then switched in parallel and the heating field A is again set to the same current intensity IH of FIG. 4A as explained with reference to FIG. 1, consequently the respective magnetic fields B of the heating element sections HA are also reduced.
- heating element sections HA; n 4 arranged, which have the same length in the embodiment and are each energized with a current of 1A, the operating voltage UB with respect to the example in Figure 1 remains unchanged.
- Heating element sections HA; n> 1, depending on the length designation of the heating element sections HA; n> 1 can be reduced by a predefinable amount.
- This structure represents a so-called reference heating element, wherein nine reference measuring points 1 to 9 are shown, in which the values of those acting there
- the electromagnetic fields B acting on the surface of the heating element H having a single heating wire H were measured in a grid-like manner at the reference measuring points 1 to 9.
- the mentioned measuring device is used for the safety assessment of the radiation exposure of humans through magnetic fields and for the acceptance measurement of electrically operated products.
- Each of the new reference measurement points 1 to 9 is thus a certain value of one
- FIG. 4 in comparison with FIG. 3, the corresponding arrangement is shown in which a support element 100 is likewise arranged, whose predetermined heating surface A corresponds to the heating surface A in FIG.
- Operating voltage UB in Figure 4 compared to Figure 3 be the same size, so that the
- Comparison measuring points 1 to 9 arranged and the corresponding experimental evaluation was determined by measurements with the Narda ELT-400, that in each of the comparison points 1 to 9 of Figure 4, the associated electromagnetic fields B compared to the reference measuring points 1 to 9 in FIG 3 are substantially reduced.
- the experiments thus confirmed that the formation of at least two heating element sections HA, n> 1 of the same length or different lengths achieves a proven reduction of the electromagnetic fields B in the nine comparative measuring points 1 to 9 chosen by way of example only.
- the limit value B limit is assigned to a maximum permissible electromagnetic field B, wherein the limit value B limit should not be exceeded at any point of the heating surface A of the carrier element 100.
- the predefinable limit value B limit is even undershot by a predefinable percentage p%.
- the limit value B limit should be 50% or 75% of a maximum permissible value B max of the electromagnetic field B, that is to say fall below by a certain percentage p% by 50% or 25% is to give a personal protection compared to a policy-limit in the said Directive ICNIRP is further enhanced by the limit B limit is set well below the policy limit.
Landscapes
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018204412.0A DE102018204412A1 (de) | 2018-03-22 | 2018-03-22 | Anordnung von Litzen-Heizelementen und Verfahren zur Begrenzung von magnetischen und elektromagnetischen Feldern |
| PCT/EP2019/057021 WO2019180110A1 (de) | 2018-03-22 | 2019-03-21 | Anordnung von litzen-heizelementen und verfahren zur begrenzung von magnetischen und elektromagnetischen feldern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3769584A1 true EP3769584A1 (de) | 2021-01-27 |
Family
ID=65904421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19712979.4A Pending EP3769584A1 (de) | 2018-03-22 | 2019-03-21 | Anordnung von litzen-heizelementen und verfahren zur begrenzung von magnetischen und elektromagnetischen feldern |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3769584A1 (de) |
| DE (1) | DE102018204412A1 (de) |
| WO (1) | WO2019180110A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4661689A (en) * | 1985-10-28 | 1987-04-28 | Collins & Aikman Corporation | Electrical heating pad with antistatic surface |
| US5410127A (en) * | 1993-11-30 | 1995-04-25 | Larue; John D. | Electric blanket system with reduced electromagnetic field |
| JP2651793B2 (ja) * | 1993-12-20 | 1997-09-10 | 坂口電熱株式会社 | セラミックファイバーヒーター |
| DE19909336C2 (de) * | 1999-03-03 | 2002-04-04 | Wet Automotive Systems Ag | Heizelement für einen Fahrzeugsitz |
| DE10342285B4 (de) * | 2003-07-07 | 2005-08-11 | Textilforschungsinstitut Thüringen-Vogtland e.V. | Verfahren zur Herstellung von textilen Flächen sowie textile Flächengebilde mit Heizleitern |
| DE102007019891A1 (de) | 2007-04-27 | 2008-11-06 | Conti Temic Microelectronic Gmbh | Heizvorrichtung und Verfahren zum Beheizen einer Vorrichtung, insbesondere einer Sitzheizung oder einer Lenkradheizung eines Fahrzeugs |
| US10442328B2 (en) * | 2016-06-21 | 2019-10-15 | Kongsberg Automotive Ab | Assembly, system, and circuit with combined heating and occupancy detecting for a vehicle seat |
-
2018
- 2018-03-22 DE DE102018204412.0A patent/DE102018204412A1/de not_active Withdrawn
-
2019
- 2019-03-21 WO PCT/EP2019/057021 patent/WO2019180110A1/de not_active Ceased
- 2019-03-21 EP EP19712979.4A patent/EP3769584A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018204412A1 (de) | 2019-09-26 |
| WO2019180110A1 (de) | 2019-09-26 |
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