Patent ID: 7975657

Claim:
A portable heat transfer apparatus comprising: a fuel-gas supply unit provided with an LPG supply source and a pressure regulator, and adapted to supply LPG as fuel gas; a fuel gas-air air-fuel unit provided with a fuel-gas injection nozzle and a venturi tube each operable to operate with said fuel gas, and adapted to mix said fuel gas with air so as to provide a mixture thereof, said fuel gas-air air-fuel unit including an air-fuel ratio adjustment mechanism adapted to adjust an air-fuel ratio of said mixture during a start-up and warm-up period; a piezoelectric ignition unit adapted to be activated by moving a control lever; a burner adapted to subject said mixture to flame burning in a combustion chamber thereof; a heat-collecting container disposed to surround said burner; a heat-drive pump joined to said heat-collecting container, and adapted to transfer a liquid heated by heat generated in said burner, to a heat load via a liquid circuit; and a spring-type timer adapted to be moved by said control lever, wherein said air-fuel ratio adjustment mechanism is adapted to be moved in conjunction with said movement of said spring-type timer.