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
  • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
  • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
  • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
  • H05B3/145—Carbon only, e.g. carbon black, graphite
• • 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
  • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional [2D] 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
  • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

• the invention relates to a surface heating element with a carbon fiber resistance heating element, wherein the carbon fibers are recycled in a pyrolysis process, the carbon fibers are cut before or after the pyrolysis, and the recycled and cut carbon fibers are processed into a carbon fiber nonwoven fabric.
• the invention relates to the field of electrical heating systems, wherein heat is generated within a heating element or a heating mat via the electrical resistance.
• Such heating systems are known in the art, which are arranged as honeycomb arranged carbon fiber nets in non-carbon fiber carrier fabrics.
• the publication DE 10 2004 025 033 A1 discloses radiant heaters having a radiating body, wherein the heating element consists of graphite foils or graphite laminate plates.
• the document DE 42 33 118 A1 to take a motor vehicle seat heater, in which a carbon fiber fabric is used as resistance heating and this is supplied via contact wires.
• heating systems known in the prior art are heating wires which are laid in a meandering or linear manner on a surface and are contacted accordingly. In some cases, they are fabric-like arrangements made of carbon fibers which are configured as heating systems via multilayer contacts.
• Heating zones arise, which bring about the heated area partly cool spots as well as hotspots with it.
• the present invention has for its object to provide a surface heating, which makes it possible to provide an easy to integrate and also more energy efficient heating system using carbon fibers, which can be produced as inexpensively as possible, has a long life and also easy to use.
• the surface heating element with a carbon fiber resistance heating element is characterized in that the carbon fibers are recycled in a pyrolysis process, the carbon fibers are cut before or after the pyrolysis, and the recycled and cut carbon fibers are processed into a carbon fiber nonwoven fabric without sizing.
• this surface heating element is diverse and range from the heating of motor vehicle interiors on camping vehicles and caravans to roof coverings and wall paneling and car seat heaters. Furthermore, the use as a decorative element, especially behind pictures or wall elements is particularly interesting because the problems indicated in the prior art can not occur here, such as hot spots or cooling points that could change a heated element in its structure under certain circumstances.
• the mean fiber length of the recycled carbon fibers used in the carbon fiber nonwoven fabric is 6/12 mm.
• the invention resides in forming the carbon fiber nonwoven as the surface heating element, the nonwoven fabric being made of recycled carbon fibers previously subjected to pyrolysis, the recycled carbon fibers being cut to a length in the range of 6 to 12 mm before or after pyrolysis and were processed by a nonwoven laying process to corresponding nonwovens.
• the carbon fibers in the carbon fiber nonwoven fabric have a length in the range of 6 to 12 mm.
• the carbon fibers in the carbon fiber web have a density of from 1.4 g / cm 3 to 2.2 g / cm 3, particularly preferably 1.8 g / cm 3.
• the density is 1.8 g / cm 3
• the fiber diameter is about 6 microns and the fiber is simple.
• the carbon fibers in the carbon fiber nonwoven fabric have a fiber diameter in the range of 4 to 8 microns, more preferably 6 microns.
• the carbon fiber nonwoven fabric has a grammage of 10 to 40 g / m 2 , particularly preferably 30 g / m 2 .
• the material is thinner than previously known material nonwovens and can thus be more easily integrated.
• the carbon fiber nonwoven fabric has a thickness of 0.1 to 0.4 mm, in particular 0.31 mm.
• the use of a carbon fiber fabric made of recycled carbon fibers also has the great advantage that the thickness is significantly reduced.
• the contacting can be done in the claimed surface heating element by copper contacts, which are applied to the fabric.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=50943161

Family Applications (1)

Country Status (1)

Cited By (6)

Citations (11)

• 2014
  • 2014-06-14 EP EP14172459.1A patent/EP2955975A1/fr not_active Withdrawn

Patent Citations (11)

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