US20080251511A1 - Apparatus for heating vehicle seat - Google Patents
Apparatus for heating vehicle seat Download PDFInfo
- Publication number
- US20080251511A1 US20080251511A1 US11/733,693 US73369307A US2008251511A1 US 20080251511 A1 US20080251511 A1 US 20080251511A1 US 73369307 A US73369307 A US 73369307A US 2008251511 A1 US2008251511 A1 US 2008251511A1
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- US
- United States
- Prior art keywords
- wire
- inner wire
- heating element
- electric heating
- outer wire
- 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.)
- Abandoned
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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
- H05B3/342—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
- H05B2203/017—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 present invention relates to an apparatus for heating a vehicle seat, and more particularly, to an apparatus for heating a vehicle seat capable of attenuating an electromagnetic field generated from a heating element.
- a vehicle seat heating apparatus comprises a heating wire, typically having a length between 5 and 8 meters and a resistance between 3 and 5 ohms, installed in a seat cushion of the vehicle.
- the heating wire is heated using power from the vehicle.
- an electric field is generated around the conductor. Accordingly, when a driver drives the vehicle while using the heating apparatus for a certain amount of time, the generated electric field will inevitably harm the body of the driver.
- the present invention is directed to an apparatus for heating a vehicle seat capable of attenuating an electromagnetic field generated from a heating element.
- the present invention is embodied in an electric heating element comprising, a core support, an inner wire wound around the core support, an intermediate dielectric layer formed around the inner wire, an outer wire wound around the intermediate dielectric layer, a connector connecting an end of the inner wire to an end of the outer wire, and an outer sheath formed around the outer wire, wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate electromagnetic fields generated from the inner wire and outer wire when a power is applied to the to inner wire and outer wire.
- the inner wire is wound at a helical pitch of approximately 1 mm.
- the inner wire is an enameled copper wire.
- the inner wire has a diameter of approximately 0.23 mm.
- the outer wire is wound at a helical pitch of approximately 1 mm.
- the outer wire is an alloy wire.
- the outer wire has a resistance value substantially equal to the electric heating element.
- the core support is a glass yarn.
- the intermediate dielectric layer comprises a silicon resin.
- the power applied to the inner wire and outer wire is between 12 V and 24 V.
- an apparatus for heating a vehicle seat comprises an electric heating element mounted in the vehicle seat, the electric heating element comprising a core support, an inner wire wound around the core support, an intermediate dielectric layer formed around the inner wire, an outer wire wound around the intermediate dielectric layer, a connector connecting an end of the inner wire to an end of the outer wire, and an outer sheath formed around the outer wire.
- the apparatus further comprises a power supply for transferring power from the vehicle to the inner wire and outer wire, and a switch installed on the power supply for regulating the power transferred from the vehicle to the inner wire and outer wire, wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate electromagnetic fields generated from the inner wire and outer wire when the power is transferred to the inner wire and outer wire.
- the inner wire is wound at a helical pitch of approximately 1 mm.
- the inner wire is an enameled copper wire.
- the inner wire has a diameter of approximately 0.23 mm.
- the outer wire is wound at a helical pitch of approximately 1 mm.
- the outer wire is an alloy wire.
- the outer wire has a resistance value substantially equal to the electric heating element.
- the core support is a glass yarn.
- the intermediate dielectric layer comprises a silicon resin.
- the power applied to the inner wire and outer wire is between 12 V and 24 V.
- FIG. 1 illustrates an apparatus for heating a vehicle seat in a state of being used, in accordance with one embodiment of the present invention.
- FIG. 2 illustrates a driving circuit diagram of an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.
- FIG. 3 illustrates a partial cutaway view of a heating element used for an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.
- FIG. 4 illustrates a circuit diagram illustrating a connection state of a power supply and a heating element in an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.
- the present invention relates to an apparatus for heating a vehicle seat capable of attenuating an electromagnetic field generated from a heating element.
- FIG. 1 illustrates an apparatus for heating a vehicle seat in a state of being used, in accordance with one embodiment of the present invention.
- a vehicle 6 comprises at least one vehicle seat 5 installed therein.
- the at least one vehicle seat 5 includes a vehicle seat heating apparatus comprising heating elements 10 .
- FIG. 2 illustrates a driving circuit diagram of an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.
- a power supply 1 supplies direct current (DC) power of a vehicle to heating elements 10 installed on at least one vehicle seat 5 (as shown in FIG. 1 ).
- the DC power is preferably maintained at a DC voltage between 12V and 24V.
- the DC power supplied through the power supply 1 flows or is interrupted according to a current on-off switch 2 . High and low heat settings are selected by a temperature selection switch 3 .
- the power supply 1 may be detachably coupled to the heating elements 10 via couplers 4 .
- the power supply 1 supplies the DC power to the at least one vehicle seat 5 installed on the vehicle 6 , wherein a heating element 10 of each seat drives current from the power supply 1 by means of the discrete couplers 4 .
- FIG. 3 illustrates a partial cutaway view of a heating element used for an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.
- FIG. 4 illustrates a circuit diagram illustrating a connection state of a power supply and a heating element in an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.
- the DC power supplied from the power supply 1 is applied to an inner wire 21 and an outer wire 22 of each heating element 10 via a connector 23 .
- the current flowing through the inner wire 21 is generally out of phase with the current flowing through the outer wire 22 .
- the magnetic fields emitted into the same space by currents having the opposite phases interact with each other to reduce the intensity of each magnetic field.
- the inner wire 21 and the outer wire 22 are densely wound with a turn pitch of approximately 1 mm. Therefore, the magnetic fields leaked by the inner wire 21 and the outer wire 22 cause interference between congested magnetic waves so that the magnetic fields are attenuated with high efficiency.
- the inner wire 21 is constructed by winding an enameled copper wire having a diameter of approximately 0.23 mm around a core support 11 .
- turns of the conductor wound at a dense pitch are displaced in a wound state, and are thereby in contact with each other. In this state, when current is passed through the contacting turns, a resistance value of each turn is changed. Thus, the attenuation effect of the magnetic field becomes low.
- the inner wire 21 is loosely wound around the core support 11 with a small turn diameter so that its turns are displaced in a wound state, and thus are in contact with each other in a displaced state.
- the inner wire 21 preferably comprises the enameled copper wire, the turns of the inner wire 21 are insulated from each other even though the turns contact each other. Thus, a reduction in the actual conduction length of the inner wire 21 is prevented.
- the outer wire 22 comprises an alloy wire, such as a nichrome wire, for example. Accordingly, the outer wire 22 has high tensile strength, and can be densely wound so as not to be displaced by tensely applying the outer wire 22 to an intermediate dielectric layer 12 having a diameter larger than the core support 11 .
- the outer wire 22 wound closely around the intermediate dielectric layer 12 in a contacting state, is covered by an outer dielectric layer 13 .
- the outer wire 22 is firmly fixed so as not to be displaced. Accordingly, even if the heating apparatus of the present invention is pressed by the seats when in use, and the heating elements thereof are subject to vibration and friction due to a driving vibration of the vehicle, the outer wire 22 can maintain an initial electric resistance of the wound state.
- a heating element has the following construction.
- the core support 11 comprises a glass yarn having a diameter of 1 mm.
- the inner wire 21 comprises a dielectric coating copper wire having a diameter of 0.23 mm and is wound around the core support 11 .
- a silicon resin is extruded on the inner wire 21 to form an intermediate dielectric layer 12 having a diameter of 2.2 mm.
- An alloy wire, such as a nichrome wire, is selected to have a length and diameter corresponding to a resistance value of the heater and is wound around the intermediate dielectric layer 12 with a predetermined tension at a pitch of 0.8 mm to provide the outer wire 22 .
- the outer wire 22 is covered with an outer sheath.
- one end of the inner wire 21 is connected to one end of the outer wire 22 .
- the heating element has a diameter of approximately 3.4 mm.
- an apparatus for heating a vehicle seat including the heating element is installed in the vehicle seat and is powered by a 12V DC power supply. Accordingly, when the heating apparatus is driven, a magnetic field leak is reduced by 98% and a magnetic flux density of 0.5 mG or less is attained.
- the DC heating apparatus for the vehicle seat comprises an enameled copper wire and an alloy wire for adjusting the value of resistance and are installed in the form of a double wire to be used as a heating element while attenuating a magnetic field.
- the DC heating apparatus is easily manufactured, and attenuates the magnetic field with high efficiency.
- wound conductors are densely arranged to subject a leaking magnetic field to interference from magnetic wave radiation so that the leaking magnetic field is reduced by 98%.
- total magnetic flux density is 0.5 mG or less.
- the actual conduction length of the copper wire is not reduced.
Abstract
The present invention relates to an electric heating element. The electric heating element includes a core support, an inner wire wound around the core support, an intermediate dielectric layer formed around the inner wire, an outer wire wound around the intermediate dielectric layer, a connector connecting an end of the inner wire to an end of the outer wire, and an outer sheath formed around the outer wire, wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate magnetic fields generated from the inner wire and outer wire when a power is applied to the to inner wire and outer wire.
Description
- The present invention relates to an apparatus for heating a vehicle seat, and more particularly, to an apparatus for heating a vehicle seat capable of attenuating an electromagnetic field generated from a heating element.
- A vehicle seat heating apparatus comprises a heating wire, typically having a length between 5 and 8 meters and a resistance between 3 and 5 ohms, installed in a seat cushion of the vehicle. The heating wire is heated using power from the vehicle. When current flows through an electric conductor, an electric field is generated around the conductor. Accordingly, when a driver drives the vehicle while using the heating apparatus for a certain amount of time, the generated electric field will inevitably harm the body of the driver.
- Thus, a related art apparatus for attenuating the electric field generated around the conductor to protect the driver has been developed. In this apparatus, when current flows through double-stranded twisted conductors, magnetic fields having opposite phases are generated from the double-stranded twisted conductors, and thereby the magnetic fields the phases of which are opposite each other undergo destructive interference. Conventionally, because a vacuum tube has a supply power ranging from 0.2 W to 2 W. the mere twisting of two strands of heaters causes the magnetic field generated in the vacuum tube to be suppressed for the most part. However, a problem arises when power consumption increases to a range from 10 W to 30 W because twisting the conductors alone is not enough to attenuate the magnetic field.
- When the heaters are driven by alternating current (AC) power, the electric field and the magnetic field are generated at the same time. In the case of using AC power, when a current of 1 A at 100V flows through double-stranded twisted heaters, a magnetic flux of 15 mG is detected from the twisted heaters. For heating elements arranged in parallel, a magnetic flux of 30 mG is detected. For heating elements comprising a spiral winding structure, a magnetic flux of 8 mG is detected. Accordingly, these detected results show that the magnetic field is not sufficiently attenuated merely by the simple structure in which the heating elements are twisted. Furthermore, it is difficult to install heating conductors in the vehicle seat so that they have opposite phases.
- The present invention is directed to an apparatus for heating a vehicle seat capable of attenuating an electromagnetic field generated from a heating element.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the present invention is embodied in an electric heating element comprising, a core support, an inner wire wound around the core support, an intermediate dielectric layer formed around the inner wire, an outer wire wound around the intermediate dielectric layer, a connector connecting an end of the inner wire to an end of the outer wire, and an outer sheath formed around the outer wire, wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate electromagnetic fields generated from the inner wire and outer wire when a power is applied to the to inner wire and outer wire.
- In one aspect of the invention, the inner wire is wound at a helical pitch of approximately 1 mm. Preferably the inner wire is an enameled copper wire. Preferably, the inner wire has a diameter of approximately 0.23 mm.
- In another aspect of the invention, the outer wire is wound at a helical pitch of approximately 1 mm. Preferably, the outer wire is an alloy wire. Preferably, the outer wire has a resistance value substantially equal to the electric heating element.
- Preferably, the core support is a glass yarn. Preferably, the intermediate dielectric layer comprises a silicon resin. Preferably, the power applied to the inner wire and outer wire is between 12 V and 24 V.
- In accordance with another embodiment of the present invention, an apparatus for heating a vehicle seat comprises an electric heating element mounted in the vehicle seat, the electric heating element comprising a core support, an inner wire wound around the core support, an intermediate dielectric layer formed around the inner wire, an outer wire wound around the intermediate dielectric layer, a connector connecting an end of the inner wire to an end of the outer wire, and an outer sheath formed around the outer wire.
- The apparatus further comprises a power supply for transferring power from the vehicle to the inner wire and outer wire, and a switch installed on the power supply for regulating the power transferred from the vehicle to the inner wire and outer wire, wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate electromagnetic fields generated from the inner wire and outer wire when the power is transferred to the inner wire and outer wire.
- In one aspect of the invention, the inner wire is wound at a helical pitch of approximately 1 mm. Preferably, the inner wire is an enameled copper wire. Preferably, the inner wire has a diameter of approximately 0.23 mm.
- In another aspect of the invention, the outer wire is wound at a helical pitch of approximately 1 mm. Preferably, the outer wire is an alloy wire. Preferably, the outer wire has a resistance value substantially equal to the electric heating element.
- Preferably, the core support is a glass yarn. Preferably, the intermediate dielectric layer comprises a silicon resin. Preferably, the power applied to the inner wire and outer wire is between 12 V and 24 V.
- It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Features, elements, and aspects of the invention that are referenced by the same numerals in different figures represent the same, equivalent, or similar features, elements, or aspects in accordance with one or more embodiments.
-
FIG. 1 illustrates an apparatus for heating a vehicle seat in a state of being used, in accordance with one embodiment of the present invention. -
FIG. 2 illustrates a driving circuit diagram of an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention. -
FIG. 3 illustrates a partial cutaway view of a heating element used for an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention. -
FIG. 4 illustrates a circuit diagram illustrating a connection state of a power supply and a heating element in an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention. - The present invention relates to an apparatus for heating a vehicle seat capable of attenuating an electromagnetic field generated from a heating element.
- Reference will now be made in greater detail to preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings and the description to refer to the same or like parts.
-
FIG. 1 illustrates an apparatus for heating a vehicle seat in a state of being used, in accordance with one embodiment of the present invention. Referring toFIG. 1 , avehicle 6 comprises at least onevehicle seat 5 installed therein. Preferably, the at least onevehicle seat 5 includes a vehicle seat heating apparatus comprisingheating elements 10. -
FIG. 2 illustrates a driving circuit diagram of an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention. Referring toFIG. 2 , apower supply 1 supplies direct current (DC) power of a vehicle toheating elements 10 installed on at least one vehicle seat 5 (as shown inFIG. 1 ). The DC power is preferably maintained at a DC voltage between 12V and 24V. The DC power supplied through thepower supply 1 flows or is interrupted according to a current on-off switch 2. High and low heat settings are selected by atemperature selection switch 3. Thepower supply 1 may be detachably coupled to theheating elements 10 viacouplers 4. Preferably, thepower supply 1 supplies the DC power to the at least onevehicle seat 5 installed on thevehicle 6, wherein aheating element 10 of each seat drives current from thepower supply 1 by means of thediscrete couplers 4. -
FIG. 3 illustrates a partial cutaway view of a heating element used for an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention.FIG. 4 illustrates a circuit diagram illustrating a connection state of a power supply and a heating element in an apparatus for heating a vehicle seat in accordance with one embodiment of the present invention. - Referring to
FIGS. 2-4 , the DC power supplied from thepower supply 1 is applied to aninner wire 21 and anouter wire 22 of eachheating element 10 via aconnector 23. Hence, the current flowing through theinner wire 21 is generally out of phase with the current flowing through theouter wire 22. Accordingly, the magnetic fields emitted into the same space by currents having the opposite phases, interact with each other to reduce the intensity of each magnetic field. - Preferably, the
inner wire 21 and theouter wire 22 are densely wound with a turn pitch of approximately 1 mm. Therefore, the magnetic fields leaked by theinner wire 21 and theouter wire 22 cause interference between congested magnetic waves so that the magnetic fields are attenuated with high efficiency. - Preferably, the
inner wire 21 is constructed by winding an enameled copper wire having a diameter of approximately 0.23 mm around acore support 11. Generally, turns of the conductor wound at a dense pitch are displaced in a wound state, and are thereby in contact with each other. In this state, when current is passed through the contacting turns, a resistance value of each turn is changed. Thus, the attenuation effect of the magnetic field becomes low. - Therefore, in accordance with one embodiment of the present invention, the
inner wire 21 is loosely wound around thecore support 11 with a small turn diameter so that its turns are displaced in a wound state, and thus are in contact with each other in a displaced state. However, because theinner wire 21 preferably comprises the enameled copper wire, the turns of theinner wire 21 are insulated from each other even though the turns contact each other. Thus, a reduction in the actual conduction length of theinner wire 21 is prevented. - Preferably, the
outer wire 22 comprises an alloy wire, such as a nichrome wire, for example. Accordingly, theouter wire 22 has high tensile strength, and can be densely wound so as not to be displaced by tensely applying theouter wire 22 to anintermediate dielectric layer 12 having a diameter larger than thecore support 11. Preferably, theouter wire 22, wound closely around theintermediate dielectric layer 12 in a contacting state, is covered by anouter dielectric layer 13. Thus, theouter wire 22 is firmly fixed so as not to be displaced. Accordingly, even if the heating apparatus of the present invention is pressed by the seats when in use, and the heating elements thereof are subject to vibration and friction due to a driving vibration of the vehicle, theouter wire 22 can maintain an initial electric resistance of the wound state. - In accordance with one embodiment of the present invention, a heating element has the following construction. The
core support 11 comprises a glass yarn having a diameter of 1 mm. Moreover, theinner wire 21 comprises a dielectric coating copper wire having a diameter of 0.23 mm and is wound around thecore support 11. Preferably, a silicon resin is extruded on theinner wire 21 to form anintermediate dielectric layer 12 having a diameter of 2.2 mm. An alloy wire, such as a nichrome wire, is selected to have a length and diameter corresponding to a resistance value of the heater and is wound around theintermediate dielectric layer 12 with a predetermined tension at a pitch of 0.8 mm to provide theouter wire 22. Preferably, theouter wire 22 is covered with an outer sheath. Moreover, one end of theinner wire 21 is connected to one end of theouter wire 22. - Preferably, the heating element has a diameter of approximately 3.4 mm. Preferably, an apparatus for heating a vehicle seat including the heating element is installed in the vehicle seat and is powered by a 12V DC power supply. Accordingly, when the heating apparatus is driven, a magnetic field leak is reduced by 98% and a magnetic flux density of 0.5 mG or less is attained.
- As can be seen from the foregoing, according to the present invention, the DC heating apparatus for the vehicle seat comprises an enameled copper wire and an alloy wire for adjusting the value of resistance and are installed in the form of a double wire to be used as a heating element while attenuating a magnetic field. Thereby, the DC heating apparatus is easily manufactured, and attenuates the magnetic field with high efficiency. Further, wound conductors are densely arranged to subject a leaking magnetic field to interference from magnetic wave radiation so that the leaking magnetic field is reduced by 98%. Also, total magnetic flux density is 0.5 mG or less. In addition, in spite of contact between the turns of a densely wound copper wire, the actual conduction length of the copper wire is not reduced.
- Although an exemplary embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (20)
1. An electric heating element comprising:
a core support;
an inner wire wound around the core support;
an intermediate dielectric layer formed around the inner wire;
an outer wire wound around the intermediate dielectric layer;
a connector connecting an end of the inner wire to an end of the outer wire; and
an outer sheath formed around the outer wire,
wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate electromagnetic fields generated from the inner wire and outer wire when a power is applied to the to inner wire and outer wire.
2. The electric heating element of claim 1 , wherein the inner wire is wound at a helical pitch of approximately 1 mm.
3. The electric heating element of claim 1 , wherein the inner wire is an enameled copper wire.
4. The electric heating element of claim 1 , wherein the inner wire has a diameter of approximately 0.23 mm.
5. The electric heating element of claim 1 , wherein the outer wire is wound at a helical pitch of approximately 1 mm.
6. The electric heating element of claim 1 , wherein the outer wire is an alloy wire.
7. The electric heating element of claim 1 , wherein the outer wire has a resistance value substantially equal to the electric heating element.
8. The electric heating element of claim 1 , wherein the core support is a glass yarn.
9. The electric heating element of claim 1 , wherein the intermediate dielectric layer comprises a silicon resin.
10. The electric heating element of claim 1 , wherein the power applied to the inner wire and outer wire is between 12 V and 24 V.
11. An apparatus for heating a vehicle seat, the apparatus comprising:
an electric heating element mounted in the vehicle seat, the electric heating element comprising a core support, an inner wire wound around the core support, an intermediate dielectric layer formed around the inner wire, an outer wire wound around the intermediate dielectric layer, a connector connecting an end of the inner wire to an end of the outer wire, and an outer sheath formed around the outer wire;
a power supply for transferring power from the vehicle to the inner wire and outer wire; and
a switch installed on the power supply for regulating the power transferred from the vehicle to the inner wire and outer wire,
wherein the inner wire and outer wire are arranged to have opposite phases according to a direction of a current to attenuate electromagnetic fields generated from the inner wire and outer wire when the power is transferred to the inner wire and outer wire.
12. The apparatus of claim 11 , wherein the inner wire is wound at a helical pitch of approximately 1 mm.
13. The apparatus of claim 11 , wherein the inner wire is an enameled copper wire.
14. The apparatus of claim 11 , wherein the inner wire has a diameter of approximately 0.23 mm.
15. The apparatus of claim 11 , wherein the outer wire is wound at a helical pitch of approximately 1 mm.
16. The apparatus of claim 11 , wherein the outer wire is an alloy wire.
17. The apparatus of claim 11 , wherein the outer wire has a resistance value substantially equal to the electric heating element.
18. The apparatus of claim 11 , wherein the core support is a glass yarn.
19. The apparatus of claim 11 , wherein the intermediate dielectric layer comprises a silicon resin.
20. The apparatus of claim 11 , wherein the power transferred to the inner wire and outer wire is between 12 V and 24 V.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/733,693 US20080251511A1 (en) | 2007-04-10 | 2007-04-10 | Apparatus for heating vehicle seat |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/733,693 US20080251511A1 (en) | 2007-04-10 | 2007-04-10 | Apparatus for heating vehicle seat |
Publications (1)
Publication Number | Publication Date |
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US20080251511A1 true US20080251511A1 (en) | 2008-10-16 |
Family
ID=39852779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/733,693 Abandoned US20080251511A1 (en) | 2007-04-10 | 2007-04-10 | Apparatus for heating vehicle seat |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9301341B2 (en) | 2013-03-14 | 2016-03-29 | Chromalox, Inc. | Medium voltage heating element assembly |
CN105546270A (en) * | 2016-03-07 | 2016-05-04 | 深圳市巍特工程技术有限公司 | Lining structure, pipe and pipe repairing method |
US9523285B2 (en) | 2013-12-13 | 2016-12-20 | Chromalox, Inc. | Energy storage systems with medium voltage electrical heat exchangers |
WO2020069687A1 (en) * | 2018-10-02 | 2020-04-09 | I.G. Bauerhin Gmbh | Magnetic field-reducing flat heating element for a motor vehicle |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020195442A1 (en) * | 2001-06-09 | 2002-12-26 | Lee Myoung Jun | Thermo-sensitive heater and heater driving circuit |
US20030000942A1 (en) * | 2000-02-11 | 2003-01-02 | Lennart Holmberg | Device for heating a component in a vehicle |
US20040100131A1 (en) * | 2002-11-21 | 2004-05-27 | W.E.T. Automotive Systems Ag | Heater for an automotive vehicle and method of forming same |
-
2007
- 2007-04-10 US US11/733,693 patent/US20080251511A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030000942A1 (en) * | 2000-02-11 | 2003-01-02 | Lennart Holmberg | Device for heating a component in a vehicle |
US20020195442A1 (en) * | 2001-06-09 | 2002-12-26 | Lee Myoung Jun | Thermo-sensitive heater and heater driving circuit |
US20040100131A1 (en) * | 2002-11-21 | 2004-05-27 | W.E.T. Automotive Systems Ag | Heater for an automotive vehicle and method of forming same |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9301341B2 (en) | 2013-03-14 | 2016-03-29 | Chromalox, Inc. | Medium voltage heating element assembly |
US9523285B2 (en) | 2013-12-13 | 2016-12-20 | Chromalox, Inc. | Energy storage systems with medium voltage electrical heat exchangers |
CN105546270A (en) * | 2016-03-07 | 2016-05-04 | 深圳市巍特工程技术有限公司 | Lining structure, pipe and pipe repairing method |
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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