Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 24, 2009
Patent Application Number
11308699
Date Filed
April 24, 2006
Patent Primary Examiner
Patent abstract
An electric heating device includes an electric heater (10) and at least one heat radiator (30, 40) thermally attached to the electric heater. The electric heater includes a pair of electrode plates (12, 14) parallel to each other and a plurality of PTC (Positive Temperature Coefficient) heating elements (16) sandwiched between and electrically connecting the electrode plates. The heating elements are alternately arranged with a plurality of insulation sheets (18). An electrically-insulating and heat-conductive insulation frame (19) encloses the electrode plates therein for electrically insulating the electric heater from the heat radiator.
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