F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
257/22, 126/11.1
F28F 3/12 (2006.01) F24J 2/24 (2006.01) F28F 9/02 (2006.01) F28F 21/06 (2006.01)
Patent
CA 1076555
ABSTRACT OF THE DISCLOSURE: A heat exchanger of thermoplastics materials, e.g. polypropylene, comprises two spaced-apart headers interconnected by an extruded board comprising a plurality of tubular passages extending from one end of the board to the other; each header having a longitudinal groove in its exterior surface and a plurality of holes spaced along the groove, interconnecting the groove and the interior of the header; each end of the board being located along the groove of one of the headers and held in position by a sealing bead adhering to both the header and the board, the bead extending continuously right round the mouth of the groove where adjacent to the board, to seal against loss of any fluid flowing between the header and the tubular passages. The heat exchanger can be readily adapted for use as a solar energy collector. The board and headers are preferably polypropylene extrusions secured together and sealed by extrusion welding using an extruded bead of a polypropylene composition.
277409
Imperial Chemical Industries Limited
Na
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