Patent ID: 6029653
Filing Date: 2000-02-29
Classification: A47J,F23C

Abstract:
A cooking system comprising:a vessel having a first end, a second end, and at least one side wall, said vessel containing a cooking medium;at least one first heat exchanger tube having an outer wall, extending through said vessel from said first end to said second end, and having a first inlet in said first end and a first outlet in said second end;said at least one first heat exchanger tube having a multi-pass flow structure and including a combustion gas director tube, a first upper passage, and a first lower passage, wherein said director tube extends from said first inlet into said upper passage and toward said second end, said director tube having an outlet that is proximate said second end, and said upper passage is in communication with said lower passage;at least one burner for introducing combustion gases into said director tube through said first inlet;at least one second heat exchanger tube in thermal contact with said at least one side wall outside of said vessel, said at least one second heat exchanger including a second upper passage and a second lower passage, such that said second lower passage is in communication with said second upper passage;a collection chamber for receiving said combustion gases from said first lower passage through said first outlet, said collection chamber including at least one second outlet, at least one collection chamber divider means for directing said combustion gases into said at least one second lower passage through said at least one second outlet, and at least one second inlet, through which said combustion gases reenter said collection chamber from said at least one second upper passage.