Patent ID: 9261005
Filing Date: 2016-02-16
CPC Classification: F01N,F28D,F28F,Y02T

Claim Text:
1. An exhaust gas heat recovery device that recovers heat of an exhaust gas from an internal combustion engine, comprising: an exhaust pipe that leads the exhaust gas from an upstream side to a downstream side; a cylindrical shell that covers an outside of the exhaust pipe; and an exhaust gas heat recovery section that is interposed between the exhaust pipe and the cylindrical shell and that performs heat exchange between the exhaust gas and a heat exchange medium, wherein the exhaust gas heat recovery section includes a stacked body that comprises a plurality of stacked jacket parts each having a respective heat exchange medium conduit provided thereinside and each of a half-arc shape and, in the stacked body, the respective heat exchange medium conduits in the plurality of stacked jacket parts are serially connected to each other, via a respective inflow and outflow opening provided on each stacked jacket part, at opposite ends of the half-arc shape respectively, wherein a first clearance, through which the exhaust gas from the exhaust pipe passes, is provided between an outer circumference of the exhaust pipe and the stacked body, wherein a second clearance, through which the exhaust gas passes after passage through the first clearance, is provided between the plurality of stacked jacket parts constituting the stacked body, and wherein a third clearance, through which the exhaust gas passes after passage through the second clearance, is provided between an inner circumference of the cylindrical shell and the stacked body.