JP3177870U - Flat heater using carbon nanotube sheet - Google Patents

Abstract

A carbon nanotube having a small shape, a thin shape, high reliability, flexibility, high heat generation efficiency, and being able to be bent or bent on various shapes of pedestals. A flat heater using a sheet is provided.
A planar heater in which a plurality of carbon nanotubes are arranged in a planar shape in an alignment direction, and electrodes 6a and 6b are disposed at both ends of the carbon nanotube sheet 11. A planar heater in which a partial region of the carbon nanotube sheet 11 is bent and is in close contact with the trapezoidal step 5, and a voltage is applied to the electrodes 6a and 6b to heat the carbon nanotube sheet 11 To do.
[Selection] Figure 2

Description

  The present invention relates to a planar heater using a carbon nanotube sheet used as a heating element by arranging a carbon nanotube sheet in a planar shape in an orientation direction and applying a voltage to both ends in the longitudinal direction of the carbon nanotube sheet. Is a flat heater that is used by being attached to a pedestal having various shapes.

  Conventionally, various forms of a flat heater using a carbon nanotube sheet have been disclosed. Carbon nanotubes (CNTs) are molecules in which carbon forms a long cylindrical molecule with only covalent bonds and π-electron bonds, and is a material with high elastic modulus, electrical conductivity, semiconductor properties, thermal conductivity, etc. It is.

  For example, as shown in FIG. 13 of the specification, Patent Document 1 discloses a carbon nanotube fabric in which carbon nanotubes are woven into a textile material and a heater using the carbon nanotube fabric.

Patent Document 2 discloses a diagram in which the first substrate is disposed on the front surface of the CNT heater and the second substrate is disposed on the rear surface of FIG. 1 of the specification.

  Patent Document 3 discloses a heater arranged in the orientation direction of CNTs in FIG. 11 of the specification.

JP 2011-038238 A JP 2011-103293 A Patent registration 4817296

  The carbon nanotube woven fabric of Patent Document 1 and a heater using the same have a structure in which a plurality of carbon nanotubes are woven into a textile material, and includes a textile material that is not a direct heating element. There was a problem that heat generation efficiency was inferior.

  In the heater and the manufacturing method thereof in Patent Document 2, the first substrate is disposed on the CNT heater surface, and the second substrate is disposed on the back surface. The first substrate and the second substrate have an adverse effect as thermal resistance. There was a drawback of poor thermal efficiency.

  In the aligned carbon nanotube bulk aggregate and the manufacturing method thereof in Patent Document 3, CNT is used as a bulk form, and a form using CNT as a thin sheet is not disclosed.

  Furthermore, in Patent Documents 1, 2, and 3, only a method of using the CNT heater as a planar shape is disclosed. Bending the CNT heater and applying it to an object having a step or a curved surface Not disclosed.

  The problem of the present invention is that heat generation efficiency is excellent, the shape is small, thin, flexible, heat generation efficiency is good, and heat generation efficiency is good. It is to provide a flat heater using a carbon nanotube sheet.

  The device according to claim 1 of the present invention is a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in an orientation direction, a conductive member disposed at both ends of the carbon nanotube sheet, The carbon nanotube sheet is formed by an insulating film covering the carbon nanotube sheet, and the carbon nanotube sheet is heated by applying a voltage to the conductive members disposed at both ends, and the conductive member is a copper foil. The copper foil is laminated in order of a copper foil, a carbon nanotube sheet, and a copper foil on each end face of the carbon nanotube sheet, the carbon nanotube sheet is in close contact with a pedestal, and the pedestal is at least the carbon nanotube. The portion holding the sheet has a trapezoidal step, Is a plan heater using carbon nanotube sheet according to claim 1 or 2-Bed is bent, characterized in that it is in close contact with the pedestal.

  The device according to claim 2 of the present invention is a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in an orientation direction, a conductive member disposed at both ends of the carbon nanotube sheet, The carbon nanotube sheet is formed by an insulating film covering the carbon nanotube sheet, and the carbon nanotube sheet is heated by applying a voltage to the conductive members disposed at both ends, and the conductive member is a copper foil. The copper foil is laminated in order of a copper foil, a carbon nanotube sheet, and a copper foil on each end face of the carbon nanotube sheet, the carbon nanotube sheet is in close contact with a pedestal, and the pedestal is at least the carbon nanotube. The portion holding the sheet has at least one curved surface, and the car Nanotubes is a plan heater using carbon nanotube sheet according to claim 1 or 2, characterized in that bent along the curved surface is in close contact with the pedestal.

  According to the flat heater using the carbon nanotube sheet according to claim 1 of the present invention, the heat generation efficiency is excellent, the shape is small, the thin shape is flexible, the reliability is high, and the heat generation efficiency is high. A flat heater using a carbon nanotube sheet suitable for a good trapezoidal pedestal can be provided.

  According to the flat heater using the carbon nanotube sheet according to claim 2 of the present invention, the heat generation efficiency is excellent, the shape is small, the thickness is thin, the flexibility is high, the reliability is high, and the heat generation efficiency is high. A flat heater using a carbon nanotube sheet suitable for a pedestal having a good curved surface can be provided.

  According to the present invention, the heat generation efficiency is excellent, the shape is small, thin, flexible, heat generation efficiency is good, the pedestal of various shapes can be bent or bent, and can be adhered. A flat heater using a highly reliable carbon nanotube sheet can be provided.

The figure of the plane heater using the carbon nanotube sheet of this invention. 1A is a plan view, and FIG. 1B is a cross-sectional view taken along line AA in FIG. The figure of the plane heater using the carbon nanotube sheet mounted on the trapezoid shape base of the present invention. 2A is a plan view, and FIG. 2B is a BB cross-sectional view in FIG. 2A. The figure of the plane heater using the carbon nanotube sheet mounted in the base which has a curved surface of the present invention. 3A is a plan view, and FIG. 3B is a CC cross-sectional view in FIG. 3A. Resistance characteristics in the length direction and thickness direction of the carbon nanotube sheet used in the flat heater using the carbon nanotube sheet of the present invention.

  The planar heater using the carbon nanotube sheet of the present invention includes a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in an orientation direction, and a conductive member disposed at both ends of the carbon nanotube sheet. The carbon nanotube sheet is composed of an insulating film covering the carbon nanotube sheet, and the carbon nanotube sheet generates heat when voltage is applied to the conductive members disposed at both ends. It is a flat heater using.

  Here, the said electroconductive member is copper foil, and the said copper foil is laminated | stacked in order of the copper foil, the carbon nanotube sheet, and the copper foil in each end surface of the said carbon nanotube sheet.

  In addition, the planar heater using the carbon nanotube sheet of the present invention includes a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in an orientation direction, and a conductive property disposed at both ends of the carbon nanotube sheet. The carbon nanotube is constituted by a member, an insulating film covering the carbon nanotube sheet, and a pedestal to which the carbon nanotube sheet is adhered, and a voltage is applied to the conductive members disposed at both ends. A flat heater using a carbon nanotube sheet characterized in that the sheet generates heat.

Here, the pedestal is characterized in that at least a portion holding the carbon nanotube sheet has a trapezoidal step. The carbon nanotube is bent, and the carbon nanotube sheet portion is used in close contact with the upper surface portion of the pedestal.
Here, as the material of the pedestal, aluminum, copper plate, resin or the like is used.

The pedestal is characterized in that at least a portion for holding the carbon nanotube sheet has one or more curved surfaces.
The carbon nanotube is used while being curved along the curved surface and in close contact with the pedestal. Here, as the material of the pedestal, aluminum, copper plate, resin or the like is used.

  Examples of the flat heater using the carbon nanotube sheet of the present invention will be described below.

Example 1
1 is a view of a flat heater using the carbon nanotube sheet of Example 1. FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view taken along line AA in FIG.
In FIG. 1, 1 is a carbon nanotube sheet, which is a sheet in which a plurality of carbon nanotubes are arranged and held in a planar manner in an orientation method (longitudinal method), and copper foils 2a, 2b, 3a, 3b are provided at both ends. However, electrical conduction is realized by sandwiching the end portion of the carbon nanotube sheet 1. 4a and 4b are insulating tapes.

As for the dimensions, the length L2 of the carbon nanotube sheet 1 is 50 mm, the width W1 is 35 mm, a current of 1 A flows when a voltage of 12 V is applied, and the maximum temperature reaches 150 ° C.
The carbon nanotube sheet 1 is flexible and can be bent freely in the surface method.
FIG. 4 shows resistance characteristics in the length direction and thickness direction of the carbon nanotube. In Example 1, the resistance characteristics in the length direction in FIG. 4 are used.
Since the flat heater using the carbon nanotube sheet of the present invention does not contain any textile material as in Patent Document 1, the heat generation efficiency is better than before.

  The lengths L3 and L4 of the copper foil are 25 mm, and the lengths L21 and L22 where the carbon nanotube sheet and the copper foil overlap are 5 mm. The total length L1 is 80 mm, and the overall thickness is 0.5 mm.

(Example 2)
FIG. 2 is a diagram of a planar heater using a carbon nanotube sheet mounted on the pedestal of Example 2. 2A is a plan view, and FIG. 2B is a BB cross-sectional view in FIG. 2A.
In FIG. 2, 11 is a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in the alignment direction, and 6 a and 6 b are electrodes arranged at both ends of the carbon nanotube sheet 11. Yes, 5 is a pedestal having a trapezoidal shape having steps 51 and 52. Although not shown, the carbon nanotube sheet 11 is covered with an insulating film.

The pedestal 5 has a partial region of the carbon nanotube sheet 11 in close contact with a trapezoidal step, and a voltage is applied to the electrodes 6 a and 6 b disposed at both ends of the carbon nanotube sheet 11. The carbon nanotube sheet 11 generates heat.
The height of the step is about 5 mm, and the carbon nanotube sheet 11 is used in close contact with an object to be heated, such as a metal plate (copper, aluminum plate, resin, etc.).

  FIG. 4 shows resistance characteristics in the length direction and thickness direction of the carbon nanotube. In Example 2, the resistance characteristics in the length direction in FIG. 4 are used. Since the flat heater using the carbon nanotube sheet of the present invention does not contain any textile material as in Patent Document 1, the heat generation efficiency is better than before.

(Example 3)
FIG. 3 is a diagram of a flat heater using a carbon nanotube sheet mounted on a pedestal 5a having a curved surface. 3A is a plan view, and FIG. 3B is a CC cross-sectional view in FIG. 3A. In FIG. 3, 12 is a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in the alignment direction, and 7 a and 7 b are electrodes disposed at both ends of the carbon nanotube sheet 11. And 5a is a pedestal having a single curved surface. Although not shown, the carbon nanotube sheet 12 is covered with an insulating film.

  The pedestal is in close contact with a curved region of the pedestal with a partial region of the carbon nanotube sheet 12, and a voltage is applied to the electrodes 7 a and 7 b disposed at both ends of the carbon nanotube sheet 12. As a result, the carbon nanotube sheet 11 generates heat. The height of the step is about 5 mm, and the carbon nanotube sheet 11 is used in close contact with an object to be heated, such as a metal plate (copper, aluminum plate, resin, etc.).

  FIG. 4 shows resistance characteristics in the length direction and thickness direction of the carbon nanotube. In Example 2, the resistance characteristics in the length direction in FIG. 4 are used. Since the flat heater using the carbon nanotube sheet of the present invention does not contain any textile material as in Patent Document 1, the heat generation efficiency is better than before.

  Further, the third embodiment is not limited to FIG. 3, and can cope with a case where a plurality of curved surfaces exist. For example, the present invention can also be applied to a pedestal having a shape such as a dome-shaped roof or a kamaboko-type roof.

  According to the flat heater using the carbon nanotube sheet of the present invention, the heat generating efficiency is excellent, the shape is small, the thickness is thin, the flexibility is high, and the pedestal (member) of various shapes is highly reliable. It is possible to provide a flat heater that can be bent and adhered, and using the flexible property of the flat heater of the present invention, bases (members) of various shapes (trapezoids, curved surfaces, etc.) It can be applied to various applications, such as industrial, automotive, and household appliances, such as heating air by flowing air around a flat heater.

DESCRIPTION OF SYMBOLS 1, 11 Carbon nanotube sheet 2a, 2b Copper foil 3a, 3b Copper foil 4a, 4b Insulation tape 5, 5a Base 51, 52 Step part 53 Curved part 6a, 6b, 7a, 7b Electrode L1 Planar heater using carbon nanotube sheet The length L2 of the carbon nanotube sheet L21, L22 The length L3, L4 of the portion where the carbon nanotube sheet and the copper foil overlap L5 The length of the copper foil L5 The plane length L6, L7 of the trapezoidal portion of the pedestal Step lengths W1, W2 Planar heater width L8, L9 Base length L10 Using carbon nanotube sheet Length of curved portion L10

The device according to claim 1 of the present invention is a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in an orientation direction, a conductive member disposed at both ends of the carbon nanotube sheet, The carbon nanotube sheet is formed by an insulating film covering the carbon nanotube sheet, and the carbon nanotube sheet is heated by applying a voltage to the conductive members disposed at both ends, and the conductive member is a copper foil. The copper foil is laminated in order of a copper foil, a carbon nanotube sheet, and a copper foil on each end face of the carbon nanotube sheet, the carbon nanotube sheet is in close contact with a pedestal, and the pedestal is at least the carbon nanotube. The portion holding the sheet has a trapezoidal step, It is a plan heater employing the features and to Luca over carbon nanotube sheet that over blanking is in close contact with the folded and the pedestal.

The device according to claim 2 of the present invention is a carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in an orientation direction, a conductive member disposed at both ends of the carbon nanotube sheet, The carbon nanotube sheet is formed by an insulating film covering the carbon nanotube sheet, and the carbon nanotube sheet is heated by applying a voltage to the conductive members disposed at both ends, and the conductive member is a copper foil. The copper foil is laminated in order of a copper foil, a carbon nanotube sheet, and a copper foil on each end face of the carbon nanotube sheet, the carbon nanotube sheet is in close contact with a pedestal, and the pedestal is at least the carbon nanotube. The portion holding the sheet has at least one curved surface, and the car Nanotubes is a plan heater employing the features and to Luca over carbon nanotube sheet that is bent along the curved surface is in close contact with the pedestal.

Claims (2)

A carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in the orientation direction;
Conductive members disposed at both ends of the carbon nanotube sheet;
An insulating film covering the carbon nanotube sheet;
The carbon nanotube sheet is heated by applying a voltage to the conductive members disposed at both ends,
The conductive member is a copper foil, and the copper foil is laminated in order of a copper foil, a carbon nanotube sheet, and a copper foil at each end face of the carbon nanotube sheet,
The carbon nanotube sheet is in close contact with a pedestal,
3. The carbon according to claim 1, wherein at least a portion for holding the carbon nanotube sheet has a trapezoidal step, and the carbon nanotube is bent and closely attached to the pedestal. Planar heater using nanotube sheet. A carbon nanotube sheet formed by arranging a plurality of carbon nanotubes in a planar shape in the orientation direction;
Conductive members disposed at both ends of the carbon nanotube sheet;
An insulating film covering the carbon nanotube sheet;
The carbon nanotube sheet is heated by applying a voltage to the conductive members disposed at both ends,
The conductive member is a copper foil, and the copper foil is laminated in order of a copper foil, a carbon nanotube sheet, and a copper foil at each end face of the carbon nanotube sheet,
The carbon nanotube sheet is in close contact with a pedestal,
The pedestal has at least a portion that holds the carbon nanotube sheet, and the carbon nanotube is curved along the curved surface and is in close contact with the pedestal. Flat heater using.

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