| 摘要 |
PURPOSE:To obtain an exhaust gas heat exchanger of muffler type of low noise and high efficiency, by alternately partitioning an exhaust gas space in a water chamber, which is filled with a fluid to be heated, by partition plates with no holes and the one with a plurality of holes, and by piercing an exhaust gas pipe with a plurality of holes through those two kinds of partition plates in the circumferential direction. CONSTITUTION:A heat exchanger is composed of a water chamber 4, an exhaust gas space 5 and headers 6 and 7, and the exhaust gas space 5 is alternately divided by partition plates (A) 8 with no holes and a partition plate (B) 9 with a plurality of holes. An exhaust gas pipe 10 with a plurality of holes and a plurality of heat transfer pipes 11 pierce the pertition plates (A) 8 and (B) 9 in the circumferential direction. A water conduit 12 is provided to the water chamber 4 with which the header 6 is communicated by a water hole 13, while a water drain 14 is provided to the header 7. By this structure, heat can be efficiently exchanged. At the same time, the exhaust gas from an engine is rapidly reduced when it penetrates into an injection port 17, and after that it is rapidly reduced when it passes through an exhaust gas injection port 20 and an exhaust gas outlet part 16. Actually a six-staged muffler of expansion type is composed, so that the muffling effect of a heat exchanger can be highly improved. |
