Patent CA-2384712-A1 (CA)
Title: Heat exchanger with nest flange-formed passageway
Inventor: ENGLISH JOSEPH
IPC: F28F3/08
Filed: 2002-05-03
Abstract: A heat exchanger has a plurality of oil core plates, and a plurality of coolant core plates, with each plate having an oil inlet opening adjacent one end of the plate, an oil outlet opening spaced from the oil inlet opening towards an opposed end of the plate, a coolant inlet opening, and a coolant outlet opening, and with the coolant inlet and outlet openings being adjacent the opposed end of the plate. Each oil core plate has an inwardly inclined, upstanding flange surrounding the oil inlet opening in the plate except for a portion thereof adjacent the one end of the plate at which a gap is provided in the flange. The oil outlet opening in the plate extends to adjacent the opposed end of the plate, and a further inwardly inclined, upstanding flange surrounds the oil outlet opening in the plate except adjacent the opposed end of the plate at which a further gap or gaps are provided in the further flange.      Upstanding bosses i;n the plate are disposed on opposite sides of the oil outlet opening in the plate, with the coolant inlet and outlet openings being provided in these bosses. Each coolant core plate has an upstanding boss with inwardly inclined side walls with the oil inlet opening being provided in this boss. A further upstanding boss has the oil outlet opening provided therein with this boss extending to adjacent the opposed end of the plate, and with this further upstanding boss having inwardly inclined side walls. The oil core plates and the coolant core plates are in alternating stacked relationship, with the upstanding flange of the oil inlet opening of each oil core plate being in sealed, nested contact with the side walls of the boss of the adjacent coolant core plate in which the oil inlet opening is provided. The further upstanding flange surrounding the oil outlet opening of each oil core plate is in sealed, nested contact with the further upstanding boss having the oil outlet opening of the adjacent coolant core plate with a passageway for flow of the oil between the further upstanding boss of the coolant core plate on one side of the oil core plate and the further upstanding boss of the coolant core plate on the other side of the oil core plate and extending from the gap or gaps in the further upstanding flange of the oil core plate to the oil outlet opening, and the upstanding bosses in which the coolant inlet and outlet openings are provided in each oil core plate being in sealed contact with the adjacent coolant core plate. The periphery of each oil core plate is sealed to the periphery of the adjacent coolant core plate. Flow passages are provided between adjacent plates, with the flow passage between each oil core plate and the upwardly adjacent coolant core plate being an oil flow passage and the flow passage between each coolant core plate and the upwardly adjacent oil plate being a coolant flow passage, so that the oil flow passages alternate with the coolant flow passages, and the coolant can flow from the oil inlet opening of each oil core plate through the gap in the associated upstanding flange, through the oil flow passage, and through the gap or gaps in the further upstanding flange and the above passageway to the oil outlet opening, and coolant can flow from the coolant inlet opening of each coolant core plate through the coolant flow passage to the coolant outlet opening.