| 摘要 |
<p>PROBLEM TO BE SOLVED: To blow out heat-exchanged air K1 and non-heat exchanged air K2 with a proper ratio, in a ceiling-embedded air conditioner 1 including an auxiliary air blow passage 61.SOLUTION: A turbo fan type blower fan 3 includes a shroud 33 opened toward a bell-mouth 12, a hub 32 to which a shaft 31a of a fan motor 31 is fixed, and an intermediate hub 35 disposed between the shroud 33 and the hub 32. A plurality of lower-stage blades 36 are disposed between the intermediate hub 35 and the shroud 33 to form a lower-stage fan 37 for distributing air to a main air blow passage 51, and a plurality of upper-stage blades 35 are disposed between the hub 32 and the intermediate hub 35 to form an upper-stage fan 38 for distributing air to an auxiliary air blow passage 61.</p> |
