| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of an exhaust pipe for exhaust heat recovery which increases an area for performing heat exchange without increasing dimensions of a housing, causes exhaust gas to flow more efficiently and can heat cooling water more quickly.SOLUTION: An exhaust pipe for exhaust heat recovery includes: a housing which is connected to the exhaust pipe such that exhaust gas made influent from the front side is made effluent to the rear side and comprises a first nipple making cooling water influent therethrough and a second nipple making cooling water effluent therethrough; and a heat exchange pipe in which a plurality of elements having different diameters are combined such that the first nipple and the second nipple are communicated in the housing, and cooling channels causing cooling water to flow therethrough are formed so as to assume a plurality of layers and are attached in the housing. Therein, exhaust gas channels through which exhaust gas is caused to flow are formed so as to assume layers between cooling water channels adjacent to each other, and the first nipple is arranged on the rear side in the vehicle advancing direction with respect to the second nipple. |
