Abstract: The present invention includes a heat storage granule having a plurality of microcapsules mixed with a binder and granulated into the heat storage granule. Each of the microcapsules may have an outer case and a phase change material contained therein. The outer case may be made of synthetic resin. The phase change material can absorb and dissipate latent heat in response change in temperature. The heat storage granule may have a cover layer that has heat conductivity and resistance against alcohol, both of which may be higher than those of a thermosetting resin or a thermoplastic resin.

Abstract: A gas detector having an intake to let in the gas to be detected and detecting the gas let in through the intake by a gas sensor, in which a porous film is horizontally arranged over the gas intake, in order to prevent the gas permeability of the porous film from being affected by water, oil and/or dust riding on the porous film, wherein a water-repellant and oil-repellant porous film is horizontally provided in a stretched state over the upper end of the intake, and the outside of the outer circumferential edge of the porous film is so structured as to allow liquid on the porous film to fall externally.

Abstract: A gas detector having an intake to let in the gas to be detected and detecting the gas let in through the intake by a gas sensor, in which a porous film is horizontally arranged over the gas intake, in order to prevent the gas permeability of the porous film from being affected by water, oil and/or dust riding on the porous film, wherein a water-repellant and oil-repellant porous film is horizontally provided in a stretched state over the upper end of the intake, and the outside of the outer circumferential edge of the porous film is so structured as to allow liquid on the porous film to fall externally.