Sheet-like electric heater and a sheet-like thermal sensing element using carbon fiber mixed paper
First Claim
1. A sheet-like thermal sensing element, comprising:
- carbon fiber mixed paper; and
electrodes provided on said carbon fiber mixed paper wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C.
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Accused Products
Abstract
A sheet-like thermal sensing element includes a carbon fiber mixed paper and resin layers laminated on both surfaces of the carbon fiber mixed paper. Electrodes are provided along opposite two sides of the carbon fiber mixed paper. A temperature change can be detected by detecting the change of resistance value of the carbon fiber mixed paper. A sheet-like heater is also disclosed, the heater including a pair of carbon fiber mixed papers separated by an insulating sheet and surrounded by resin. Each of the carbon fiber mixed papers include electrodes thereon. The sheet like heater can both generate heat and detect temperature change for precise heating control. Also disclosed is a method of making both the sheet-like heater and sheet-like thermal sensing element involving producing the carbon fiber mixed paper, electrode formation, laminating the mixed papers together and resin encapsulation.
46 Citations
20 Claims
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1. A sheet-like thermal sensing element, comprising:
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carbon fiber mixed paper; and electrodes provided on said carbon fiber mixed paper wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C. - View Dependent Claims (2, 3, 4, 5)
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6. A temperature sensor, comprising:
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a sheet-like thermal sensing element including carbon fiber mixed paper wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C., electrodes provided on said carbon fiber mixed paper and resin forming said carbon fiber mixed paper into a sheet-like shape; anddetecting means connected to said electrodes for detecting a resistance value of said carbon fiber mixed paper. - View Dependent Claims (7, 8)
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9. A temperature controller for a heat generating element, comprising:
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a sheet-like thermal sensing element including carbon fiber mixed paper and electrodes provided on said carbon fiber mixed paper wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C.;detecting means connected to said electrodes of said sheet-like thermal sensing element for detecting a change of a resistance value of said carbon fiber mixed paper; and current adjusting means for adjusting current to be supplied to said heat generating element on the basis of the change of the resistance value detected by said detecting means. - View Dependent Claims (10, 11, 12)
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13. A sheet-like heater, comprising:
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a sheet-like heat generating element including carbon fiber mixed paper and electrodes provided on said carbon fiber mixed paper; and a sheet-like thermal sensing element including carbon fiber mixed paper and electrodes provided on said carbon fiber mixed paper, said sheet-like thermal sensing element laminated on said sheet-like heat generating element wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C. - View Dependent Claims (14, 15)
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16. A sheet-like heater, comprising:
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a sheet-like heat generating element including carbon fiber mixed paper and electrodes provided on said carbon fiber mixed paper; a sheet-like thermal sensing element including carbon fiber mixed paper and electrodes provided on said carbon fiber mixed paper and is laminated on said sheet-like heat generating element wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C.;detecting means connected to said electrodes of said sheet-like thermal sensing element for detecting a change of a resistance value of said carbon fiber mixed paper of said sheet-like thermal sensing element; and current adjusting means connected to said sheet-like heat generating element for adjusting current to be supplied to said carbon fiber mixed paper of said sheet-like heat generating element on the basis of the change of the resistance value detected by said detecting means. - View Dependent Claims (17, 18)
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19. A method of producing a sheet-like thermal sensing element, comprising steps of:
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producing carbon fiber mixed paper by mixing carbon fiber which is cut with a predetermined dimension into natural pulp including bast fiber wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C.;forming electrodes on said carbon fiber mixed paper; and forming said carbon fiber mixed paper with a resin layer.
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20. A method of producing a sheet-like heater, comprising the steps of:
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producing carbon fiber mixed paper for a sheet like-heat generating element and carbon fiber mixed paper for a sheet-like thermal sensing element by mixing carbon fiber cut in a predetermined dimension into natural pulp including bast fiber wherein an electrical resistance of said carbon fiber mixed paper of a specific mass varies about 5 ohms over a temperature range of about 72°
C.;forming electrodes on said carbon fiber mixed paper for said sheet-like heat generating element and said carbon fiber mixed paper for said sheet-like thermal sensing element, respectively; laminating said carbon fiber mixed paper for said sheet-like heat generating element and said carbon fiber mixed paper for said sheet-like thermal sensing element through insulating paper; and forming said laminated carbon fiber mixed paper with a resin layer.
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Specification