(19)
(11) EP 0 961 087 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.01.2003 Bulletin 2003/02

(43) Date of publication A2:
01.12.1999 Bulletin 1999/48

(21) Application number: 99630038.0

(22) Date of filing: 16.04.1999
(51) International Patent Classification (IPC)7: F24F 7/007, F04D 29/42, F04D 29/66, F24F 13/24
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 26.05.1998 US 84464

(71) Applicant: CARRIER CORPORATION
Syracuse New York 13221 (US)

(72) Inventors:
  • Chou, Shau-Tak R.
    Liverpool, New York 13090 (US)
  • Daniels Mark A.
    Manlius, New York 13104 (US)

(74) Representative: Leckey, David Herbert 
Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)

   


(54) Fan scroll


(57) 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.






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