| 摘要 |
PURPOSE: An exhaust gas heat exchanger is provided to improve the swirling efficiency of exhaust gas by extending first and second protrusions for a swirl formed on the top and bottom surfaces of each tube in a diagonal direction. CONSTITUTION: An exhaust gas heat exchanger comprises a housing (10) and multiple tube cores (20,30). An inlet side flange (11) is coupled to one end of the housing, and an outlet cap (12) is coupled to the other end. The tube cores are arranged inside the housing in multiple rows, and multiple tubes (40) are loaded thereon. Multiple first protrusions for a swirl are formed on the top surface of each tube, and multiple second protrusions for a swirl are formed on the bottom surface of each tube. The first and second protrusions are extended in a diagonal direction. |
