Abstract: The heat generating apparatus according to the present invention includes: a positive temperature coefficient thermistor heat generating element including an electrode layer; a first electrode terminal; a second electrode terminal; a holder configured to house the positive temperature coefficient thermistor heat generating element; and a heat conductive sheet, in which the heat conductive sheet includes a graphite particle and a polymer compound, a major axis direction of the graphite particle is substantially orthogonal to the surface of the positive temperature coefficient thermistor heat generating element, and the positive temperature coefficient thermistor heat generating element and the holder are assembled in a state in which they are biased so as to apply pressure to the heat conductive sheet.

Abstract: The heat generating apparatus according to the present invention includes: a positive temperature coefficient thermistor heat generating element including an electrode layer; a first electrode terminal; a second electrode terminal; a holder configured to house the positive temperature coefficient thermistor heating generating element; and a heat conductive sheet, in which the heat conductive sheet includes a graphite particle and a polymer compound, a major axis direction of the graphite particle is substantially orthogonal to the surface of the positive temperature coefficient thermistor heat generating element, and the positive temperature coefficient thermistor heat generating element and the holder are assembled in a state in which they are biased so as to apply pressure to the heat conductive sheet.

Abstract: The present invention discloses a heater structure that is composed of a heat generator and a mold. The heat generator is comprised of a PTC heating element having a pair of electrode layers, a first electrode terminal, a second electrode terminal, an insulation case that is a box shape with one side opened. An opening surface of the insulation case faces with the air pump, a protective sheet is placed, and a sum of a thickness of the mold with which the air pump is in contact and a thickness of the protective sheet is thinner than a thickness on an opposite side of the mold in the heater.