Cooling structure of heating element and power conversion device

A cooling structure of a heating element, comprising:

• the heating element having at least one cooling surface from which the plurality of projections project;
• and
• a heat receiving member having holes at positions facing the projections, the projections being loosely disposed in the holes, such that the pins fins are freely movable in all directions in the holes;
• wherein a distance from the cooling surface to a tip of each projection in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member.

A power conversion device including a cooling structure of a heating element, the cooling structure of the heating element comprising:

• the heating element having at least one cooling surface from which a plurality of projections project;
• and
• a heat receiving member having holes at positions facing the projections, the projections being loosely disposed in the holes, such that the pins fins are freely movable in all directions in the holes;
• wherein a distance from the cooling surface to a tip of each projection in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member.

A cooling structure of a heating element, comprising:

• the heating element having a body part formed in a continuous structure with a plurality of pin fins and at least one cooling surface from which the plurality of pin fins project;
• and
• a heat receiving member having holes at positions facing the pin fins, the pin fins being loosely disposed in the holes;
• wherein a distance from the cooling surface to a tip of each pin fin in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member;
• and
• wherein the plurality of the pin fins project from two opposite sides of the body part.