Heat exchanging element

The invention relates to the technical field of heat exchanging equipment and discloses a heat exchanging element provided with internal and external fins. The heat exchanging element comprises base pipes, a plurality of sets of external expansion fins arranged on the outer walls of the base pipes and a plurality of sets of internal expansion fins arranged on the inner side walls of the base pipes, wherein the multiple sets of external expansion fins are arranged at intervals in the axial directions of the base pipes, the multiple sets of internal expansion fins are arranged at intervals in the axial directions of the base pipes, and each set of internal expansion fins comprise the circumferential internal fins. The heat exchanging element is large in overall heat exchanging area and highin heat exchanging coefficient, pipeline eddy flow can be destroyed, pipeline dust accumulation is reduced, and the heat exchanging efficiency is improved. 本发明涉及换热设备技术领域，公开一种具有内外翅片的换热元件，包括基管，设置于基管外壁上的若干组外扩展翅片，以及设置于基管内侧壁上的若干组内