DRIVE MODULE

摘要

The purpose of the present invention is to obtain a drive module with which air bubbles trapped in an annular flow path can be reliably discharged, and heat can be dissipated highly efficiently with low pressure loss. A drive module according to the present invention is provided with: a rotational electric machine; an inner cylinder which has the rotational electric machine accommodated therein, and which has heat-dissipation fins provided to an outer surface thereof; an outer cylinder which is provided coaxially with respect to the inner cylinder, which covers the inner cylinder, and which, in conjunction with the inner cylinder, forms an annular flow path in which a refrigerant is made to circulate; a first flange and a second flange which close both ends of the inner cylinder and the outer cylinder; a branching header which extends along a direction of a main shaft of the rotational electric machine, and which branches the refrigerant in the annular flow path; a merging header which extends along the direction of the main shaft of the rotational electric machine, and which merges the refrigerant from the annular flow path; a partition plate which forms a partition between the branching header and the merging header; and an inlet and an outlet which are provided so as to pass through the first flange or the outer cylinder. In the partition plate, an opening is provided in a position closer to the second flange than the first flange in the direction of the main shaft of the rotational electric machine.