Patent ID: 7661420

Claim:
A portable heat transfer apparatus comprising: a mixture forming/supply device for producing a mixture of fuel gas and air; a heating unit including a heat collection casing, and a burner installed in said heat collection casing and formed with a combustion chamber having a flat surface, said burner including a large number of holes each formed on an upstream side thereof to extend up to said flat surface so as to serve as a burner port for injecting the mixture into the combustion chamber to perform combustion of said mixture in the combustion chamber, and a porous solid radiant-heat conversion component adapted to partly convert a heat energy of exhaust gas resulting from said combustion in the combustion chamber into a radiant heat energy, said, porous solid radiant-heat conversion component defining at least a surface region of the combustion chamber located in opposed relation to a flame front to be produced close to said flat surface; and a heat-driven pump joined to the heat collection casing and adapted to receive heat generated by the combustion of the mixture in the combustion, chamber, through then heat collection casing, wherein said heat collection casing is configured to fully enclose said burner in spaced-apart relation to define a space between said burner and said casing, and formed with a great number of holes constituting an upstream heat exchange section and a downstream heat exchange section, and wherein said heat collection casing is adapted to perform heat exchange when the exhaust gas from the combustion chamber passes through said downstream heat exchange section, and transfer said received heat in such a manner as to be used for preheating the mixture in said upstream heat exchange section and for heating said heat-driven pump.