(19)
(11) EP 1 197 694 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.11.2002 Bulletin 2002/46

(43) Date of publication A2:
17.04.2002 Bulletin 2002/16

(21) Application number: 01202119.2

(22) Date of filing: 05.06.2001
(51) International Patent Classification (IPC)7: F16K 31/00, F24F 11/053, F24F 13/062
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 20.06.2000 FI 20001464

(71) Applicant: ABB FLÄKT OY
37801 Toijala (FI)

(72) Inventors:
  • Hyvärinen, Juhani
    02230 Espoo (FI)
  • Kärmeniemi, Heli
    13130 Hämeenlinna (FI)

(74) Representative: Heinänen, Pekka Antero et al
Heinänen Oy, Patenttitoimisto/Patent Agency, Annankatu 31-33 C
00100 Helsinki
00100 Helsinki (FI)

   


(54) Controllable air diffuser


(57) Air diffuser for rooms and similar spaces, the diffuser being intended for mounting at the end of an air duct ending on the surface of a wall, ceiling or similar structure, and the air diffuser being comprised of an arcuate brace (1) or a similar member with a flow control disc (4) and diffuser body (3) mounted thereon, the flow control disc (4) having an actuator connected thereto for moving the flow control disc (4) between two limit positions called the minimum-opening position and the maximum-opening position, the actuator being equipped with spring elements (7, 11) of which at least one first spring is adapted to serve for moving the flow control disc (4) toward the maximum-opening position while at least one second spring serves for moving the flow control disc toward the minimum-opening position. The invention is implemented so that at least one of said spring elements is a thermally actuated memory metal spring (11) whose spring constant is capable of changing with temperature in a preprogrammed manner.






Search report