FIELD: electricity.
SUBSTANCE: case cap (10) has the first hanging edge (28) that is located on the first restricting wall (19) so that water (47) present in middle section (20) on the first restricting wall (19) drips later on the first hanging edge (28). Water (47) dripping on the first hanging edge (28) is directly or indirectly supplied to the first air inlet hole (15). In the area of the first air inlet hole (15) there arranged are the first plates (30) that divert plenum air flowing to air supply channel (17) to the second edge area (14). In the area of the second air outlet hole (23) there arranged are the second plates (36) that give a constituent directed to upper side (4) of electric machine (1) to direction of the flow leaving exhaust channel (25) for waste air. In exhaust channel (25) in edge area (27) there arranged are the third plates (42) that divert waste air (9) flowing in exhaust channel (25) from upper side (4) of electric machine (1).
EFFECT: reduction of resistance to flow in an air supply channel and in an exhaust channel.
21 cl, 3 dwg
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