To secure a cross sectional area of an air collecting passage while inhibiting occurrence of abnormal noise to avoid size increase of a fan housing and increase the blast volume per unit time.SOLUTION: A wall surface of a starting point of an air collecting passage 31 is provided with a nose part 33 formed by a curved surface part. A portion of the curved surface part which faces an outer peripheral surface of a centrifugal fan 3a is formed by a first curved surface 33a which curves having a first curvature. A portion of the curved surface part which faces the downstream side of the air collecting passage 31 is formed by a second curved surface 33b which curves having a second curvature which is smaller than the first curvature.SELECTED DRAWING: Figure 10
【課題】異音の発生を抑制しながら空気集合通路の断面積を確保することで、ファンハウジングの大型化を回避しつつ、単位時間あたりの送風量を増加させる。【解決手段】空気集合通路31の始点の壁面は、曲面部で構成されたノーズ部33が設けられている。曲面部における遠心式ファン3aの外周面に対向する部分は、第1の曲率で湾曲する第1湾曲面33aで形成され、曲面部における空気集合通路31の下流側に臨む部分は、第1の曲率よりも小さな第2の曲率で湾曲する第2湾曲面33bで形成されている。【選択図】図10
BLOWER OF VEHICLE AIR CONDITIONER
車両用空調装置の送風機
2019-01-10
Patent
Electronic Resource
Japanese
IPC: | F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / F24F Klimatisierung , AIR-CONDITIONING |