| 摘要 |
PROBLEM TO BE SOLVED: To prevent the break away of the air flow from an upper edge of an impeller on a negative pressure face of the impeller, and the increase of the disorder, and to unify the distribution of an air flow speed at an outlet of the impeller, by inclining the upper edge part of the impeller in a rotating direction of the impeller. SOLUTION: An impeller 10 of a centrifugal blower, comprises plural blades 11, a main plate 12 for fixing the blades 11, and a side plate 13 having an inlet port, and fixed to a side edge face at a side opposite to the main plate, of the blades, and a motor 5 and a heat exchanger 6 are stored and fixed in a easing 7 with the impeller 10. An inlet ring 8 is curved from an inlet edge part 8a to an outlet edge part 8b, and the outlet edge part 8b is inserted into a side plate 13 of the impeller 10. A diameter of the inlet port of the side plate 13, is larger than an inlet diameter of the impeller, and an upper edge part of the impeller 11 is inclined in a rotating direction of the impeller 10. Thereby the inflow air current can be surely attached to the blade negative pressure faces even under the high hydrostatic pressure condition, and the lowering of the blowing performance, and the increase of the turbulent noise can be prevented. |
