ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYAL..............................JDIM350 (Ver 2.1 Jan 2001) 1990980/0 1620000/00961087EUROPEAN PATENT APPLICATIONA320030108EP99630038.019990416EnEnEn8446419980526US20030108200302199912011999487 7F 24F 7/007 A 7F 04D 29/42 B 7F 04D 29/66 B 7F 24F 13/24 BdeSpirale für GebläseenFan scrollfrSpirale de ventilateur4CARRIER CORPORATION00224371FMS-11215Carrier Parkway P.O. Box 4800Syracuse New York 13221USChou, Shau-Tak R.87 Inglesid LaneLiverpool, New York 13090USDaniels Mark A.8040 Shadow RockManlius, New York 13104USLeckey, David Herbert00073221Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria StreetLondon EC4V 4ELGBATBECHCYDEDKESFIFRGBGRIEITLILUMCNLPTSEALLTLVMKROSI20030108200302

The angular extent of the flow path in a fan scroll is extended by reducing the rate of radial expansion of the flow path. By extending the angular as circumferential extent of the scroll flow path downstream of the fan impeller ANC structure can be located in/on the scroll while being located a sufficient distance downstream of the impeller. The flow path length can be increased without increasing the cubage of the scroll and, if desired, a further flow path increase can be achieved by a combination of the reduced rate of radial expansion together with increasing the cubage.