A portable heat transfer apparatus comprises 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 the casing and formed with a combustion chamber having a flat surface. The burner includes a large nu
A portable heat transfer apparatus comprises 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 the casing and formed with a combustion chamber having a flat surface. The burner includes a large number of holes formed on an upstream side thereof to extend up to the flat surface to allow the mixture injected into the chamber therethrough to combust in the chamber, and a porous solid radiant-heat conversion component to partly convert heat energy of exhaust gas from the combustion in the chamber into radiant heat energy. The conversion component defines at least a surface region of the chamber located opposite to a flame front produced close to the flat surface. The apparatus includes a heat-driven pump joined to the casing and receiving heat generated by the combustion, through the heat collection casing.
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What is claimed is: 1. 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 f
What is claimed is: 1. 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. 2. The portable heat transfer apparatus as defined in claim 1, wherein said mixture forming/supply device comprises a venturi tube provided with an air intake duct and connected to the burner, said venturi tube including a gas injection nozzle, an ejector and a diffuser. 3. The portable heat transfer apparatus as defined in claim 2, wherein said venturi tube comprises a throttle valve provided in said air intake duct, and a pressure regulator associated with said gas injection nozzle on its upstream side. 4. The portable heat transfer apparatus as defined in claim 2, wherein said porous solid radiant-heat conversion component is formed of a foamed ceramic. 5. The portable heat transfer apparatus as defined in claim 2, wherein said porous solid radiant-heat conversion component is formed of plural layers of wire meshes. 6. The portable heat transfer apparatus as defined in claim 2, wherein said combustion chamber has an internal volume of 10 cc or less. 7. The portable heat transfer apparatus as defined in claim 1, wherein a large portion of surface of the combustion chamber of said burner including said surface region opposed to the flame front is defined by said porous solid radiant-heat conversion component. 8. The portable heat transfer apparatus as defined in claim 7, wherein said porous solid radiant-heat conversion component is formed of one of the group consisting of plural layers of wire meshes, a foamed ceramic, a mat-shaped ceramics fiber, and a sintered mat-shaped heat-resistant alloy fiber. 9. The portable heat transfer apparatus as defined in claim 7, wherein said air intake duct and said exhaust duct have, respectively, an intake air inlet and an exhaust gas outlet located in the same orientation and in a spaced-apart relation from each other, each of said inlet and outlet being provided with a wind protection plate on the outside and in the vicinity thereof, said wind protection plate having a size capable of fully covering over a corresponding one of said inlet and outlet. 10. The portable heat transfer apparatus as defined in claim 1, comprising an exhaust duct in fluid communication with the downstream heat exchange section of said heat collection casing. 11. The portable heat transfer apparatus as defined in claim 10, comprising an intake air inlet and an exhaust gas outlet opened, respectively, in independent protruded surfaces located in the same orientation and in a spaced-apart relation from each other, each of said inlet and outlet being provided with a pair of wind protection plates on the outside and in the vicinity thereof, said pair of wind protections being each formed to have a size capable of fully covering over a corresponding one of said inlet and outlet, and arranged overlappingly in spaced-apart relation to each other. 12. The portable heat transfer apparatus as defined in claim 1, wherein said porous solid radiant-heat conversion component is formed of a foamed ceramic. 13. The portable heat transfer apparatus as defined in claim 1, wherein said porous solid radiant-heat conversion component is formed of plural layers of wire meshes. 14. The portable heat transfer apparatus as defined in claim 13, wherein one or more of said wire meshes have a chevron shape. 15. The portable heat transfer apparatus as defined in claim 1, wherein: said heat collection casing is made of a heat conductor including aluminum; and said burner is made of a heat-resistant ceramic material excellent in heat-radiating performance. 16. The portable heat transfer apparatus as defined in claim 1, wherein said combustion chamber includes a step for flame holding, formed at a downstream position of said flat surface having the burner ports in such a manner as to sharply increase a sectional area of the combustion chamber ma downstream direction. 17. The portable heat transfer apparatus as defined in claim 16, wherein said combustion chamber has an internal volume of 10 cc or less. 18. The portable heat transfer apparatus as defined in claim 1, wherein said combustion chamber has an internal volume of 10 cc or less. 19. The portable heat transfer apparatus as defined in claim 18, wherein: said heat collection casing is made of a heat conductor including aluminum; and said burner is made of a heat-resistant ceramic material excellent in heat-radiating performance. 20. The portable heat transfer apparatus as defined in claim 18, wherein said combustion chamber includes a step for flame holding, formed at a downstream position of said flat surface having the burner ports in such a manner as to sharply increase a sectional area of the combustion chamber in a downstream direction.
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