Fan housing for feeding air to a ventilation system

(19)

(11)

EP 0 837 246 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	18.11.1998 Bulletin 1998/47

(43)	Date of publication A2:
	22.04.1998 Bulletin 1998/17

(21)	Application number: 97850137.7

(22)	Date of filing: 14.10.1997

(51)	International Patent Classification (IPC)⁶: F04D 29/42, F04D 29/66

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV RO SI

(30)

Priority:

15.10.1996 SE 9603762

(71)	Applicant: PM-Luft AB
	535 23 Kvänum (SE)

(72)	Inventor:
	Berg, Gunnar 521 30 Falköping (SE)

(74)	Representative: Roth, Ernst Adolf Michael et al
	Göteborgs Patentbyra AB, Sjöporten 4 417 64 Göteborg 417 64 Göteborg (SE)

(54)	Fan housing for feeding air to a ventilation system

(57) The present invention relates to a fan housing for feeding air via an outlet (14) to a ventilation system. The fan housing comprises a radial impeller (16) rotatably mounted to a shaft which wheel has at least one centrally arranged inlet (17) and a number of impeller blades (18). Furthermore, there is a wall (20) being substantially parallel to the rotational axis which wall is curved with a monotonous increasing radius in relation to said shaft, between a first end edge (21) at a certain distance from said impeller and a second end edge (22) at a larger distance from said impeller. An imagined, straight line (23) between the two end edges (21, 22) extends through the impeller (16).

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