Compound heat exchange unit

The utility model discloses a compound heat exchange unit, including the casing heat exchange array pipe interior with locating the casing, heat exchange array pipe's both ends head is first entry and first export respectively, the casing upper end is all worn out in first entry and first export, casing one side lower extreme is equipped with the air intake, and casing opposite side upper end is equipped with air outlet, characterized by: heat exchange array pipe includes a plurality of U type heat exchange tubes, sleeve pipe and both do not feed through each other in being equipped with in the U type heat exchange tube, interior sheathed tube one end is equipped with the second entrance, the other end is equipped with the second export, U type heat exchange tube is all worn out in the second entrance and second export. The utility model provides a compound heat exchanger not only can be used to two medium heat transfer but also can be used to the synchronous heat transfer of three media, and heat exchange ef