| 摘要 |
The exchanger (10) has an airflow promoting ventilator (14) arranged at an end of a cylindrical case and comprising an inner ring and an outer ring (20) arranged around the inner ring. Spaces of the outer and inner rings are disconnected from each other by a cylindrical wall (22). End parts (34) of parallel-arranged pipes (32) are closely arranged together in the cylindrical wall and at an end (44) of a cylindrical pipe socket (46). A plastic case or cup-shaped insulation sleeve (50) covers an inside wall of the case in a region of center sections (36) and constricts case inner diameter. |
