초록 ▼

A heat exchanger, especially a heating or cooling radiator for a motor vehicle, has a tube bundle consisting of oval or oblong tubes which extend through a matrix of cooling fins. End portions of the tubes are introduced into holes in a header plate, with a compressible sealing gasket being interpos

A heat exchanger, especially a heating or cooling radiator for a motor vehicle, has a tube bundle consisting of oval or oblong tubes which extend through a matrix of cooling fins. End portions of the tubes are introduced into holes in a header plate, with a compressible sealing gasket being interposed, the gasket having collar portions surrounding the tube end portions, and the latter having an oval or oblong cross section. The major axis of each tube end is equal to the major axis of the body of the tube, while the minor axis of the tube end is greater than the minor axis of the body of the tube as a result of the tube having been expanded or flared during the assembly of the heat exchanger.

대표청구항 ▼

[ What is claimed is:] [1.] A heat exchanger comprising a tube bundle and a header, the tube bundle having a multiplicity of tubes and at least one set of fins fitted to the tubes, the header having a header plate formed with a plurality of holes, and a compressible sealing gasket each tube having a

[ What is claimed is:] [1.] A heat exchanger comprising a tube bundle and a header, the tube bundle having a multiplicity of tubes and at least one set of fins fitted to the tubes, the header having a header plate formed with a plurality of holes, and a compressible sealing gasket each tube having a tube body and a sealing portion of the tube body and extending through a corresponding one of the holes among the plurality of holes, a collar portion of the sealing gasket interposed between each tube sealing portion and a corresponding one of the holes among the plurality of holes, each tube sealing portion having a cross section defined by a first major axis and a first minor axis, and each tube body having a cross section defined by a second major axis and a second minor axis, wherein the first and second major axes are of equal lengths, each tube sealing portion having an expanded portion, the length of the first minor axis being greater than that of the second minor axis.