Cooling apparatus for cooling electric element

摘要

The present invention provides a cooling apparatus which can increase air flow. A plurality of blades 25 are provided with extending portions 25b of the blades which extend outwardly in the direction of the diameter of the axis 9a of the motor 9 and rotate at such a space that is outside and surrounds the opening 13 in the space 17. The extending portions 25b of the blades are integrally formed with the blades 25. The rim portions 25c of the extending portions 25b of the blades which are disposed on the side of the first wall part and extend along the first wall part are sloped so as to be gradually away from the first wall part 15 as they extend toward the edges.