Exhaust heat recovery device

摘要

An exhaust heat recovery device includes a multi-piece, chamber-shaped branching member with a draw-molded first chamber half having one inlet for introducing exhaust gas, and a draw-molded second chamber half having two outlets for discharging the exhaust gas. The draw-molded first and second chamber halves are integrally connected together to form a single chamber. A first flow channel extends from one of the two outlets of the branching member for circulating the exhaust gas. A heat exchanger is provided to the first flow channel for recovering potential heat of the exhaust gas. A second flow channel extends from the other one of the two outlets of the branching member for circulating the exhaust gas while bypassing the heat exchanger. A valve chamber houses a valve configured to open and close an outlet of the second flow channel.

主权项

1. An exhaust heat recovery device comprising:
a multi-piece, chamber-shaped branching member comprised of a draw-molded first chamber half having one inlet for introducing exhaust gas and a draw-molded second chamber half having two outlets for discharging the exhaust gas, the draw-molded first and second chamber halves being integrally connected together to form a single chamber; a first flow channel extending from one of the two outlets of the branching member for circulating the exhaust gas; a heat exchanger provided to the first flow channel for recovering potential heat of the exhaust gas; a second flow channel extending from the other one of the two outlets of the branching member for circulating the exhaust gas while bypassing the heat exchanger; a valve chamber for housing a valve configured to open and close an outlet of the second flow channel; and a merging member provided between the valve chamber and an outlet of the first flow channel for circulating the exhaust gas from the first flow channel to the valve chamber, the merging member having a multi-piece construction comprised of a draw-molded third chamber half in which two inlets are provided and a draw-molded fourth chamber half in which one outlet is provided, the third and fourth chamber halves being integrally connected together to form a single chamber; wherein the outlet of the merging member has a diameter larger than an outside diameter of the outlet of the second flow channel, the valve chamber has an inside diameter larger that the diameter of the outlet of the merging member such that the outlet of the merging member is constricted with respect to the valve chamber, and the second flow channel has a distal end passing through the outlet of the merging member and into the valve chamber.