초록 ▼

A heat exchanger which includes a casing having an outer tube and an inner tube fixed therein. Holes are formed in the inner tubes and face a heat transfer surface of the outer tube. Hot exhaust gas may be passed from an inlet of the outer tube into the inner tube, through the holes in the inner tub

A heat exchanger which includes a casing having an outer tube and an inner tube fixed therein. Holes are formed in the inner tubes and face a heat transfer surface of the outer tube. Hot exhaust gas may be passed from an inlet of the outer tube into the inner tube, through the holes in the inner tube to an outlet. Coolant water may be passed through the casing from an inlet port to an outlet port. Baffles and/or twist coils may be provided to improve heat transfer.

대표청구항 ▼

A heat exchanger, comprising: a casing having a hollow cylindrical shape and provided with inlet and outlet ports; at least one outer tube fixedly connected to and positioned within said casing; at least one inner tube fixedly inserted into said outer tube so as to form a space therebetween and prov

A heat exchanger, comprising: a casing having a hollow cylindrical shape and provided with inlet and outlet ports; at least one outer tube fixedly connected to and positioned within said casing; at least one inner tube fixedly inserted into said outer tube so as to form a space therebetween and provided with a plurality of holes formed on a substantially entire circumferential surface thereof for directly spraying a first heated fluid to an inner wall of said outer tube and therethrough wherein an outer wall of said outer tube further comprises a first heat transfer surface for directly facing a second fluid to be heated passing through said casing; passage means for said first heated fluid, said passage means being positioned between said casing and said outer tube and communicating with a first open end of said space formed between said outer tube and said inner tube and having a second heat transfer surface for directly facing said second fluid at an outer circumferential surface of said second heat transfer surface; and sealing means positioned in said outer tube for closing one end of said inner tube and for closing a second end of said space opposite said first open end.