Prevention of oil backflow from a screw compressor in a...

Details Prevention of oil backflow from a screw compressor in a... Prevention of oil backflow from a screw compressor in a...

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 1/047 (2006.01) F04C 29/02 (2006.01) F25B 31/00 (2006.01)

Patent

CA 2381591

A screw compressor (12) in a refrigeration chiller (10) includes one or more baffles (68, 80) disposed in the compressor housing (24) so as to intercept and redirect oil which may flow and/or be blown, under certain operating conditions, in an upstream direction against the stream of suction gas that flows into the compressor (12) from the evaporator (18). The baffles (68, 80) cause oil to be retained in the compressor (12) rather than being blown back to the system evaporator (18) to ensure that sufficient oil is available to the compressor (12) under all operating conditions and eliminates the need for structure/apparatus in the evaporator (18) dedicated to returning such oil to the compressor (12).

Un compresseur hélicoïdal (12) dans un dispositif de refroidissement (10) comprend au moins un déflecteur (68, 80) situé dans le boîtier du compresseur (24) de manière à intercepter et à dévier l'huile pouvant s'écouler et/ou être soufflée, dans certaines conditions de fonctionnement, vers le haut, contre le flux du gaz d'aspiration s'écoulant au sein du compresseur (12) à partir de l'évaporateur (18). Grâce aux déflecteurs (68, 80), l'huile est retenue dans le compresseur (12) et n'est pas soufflée en arrière, vers l'évaporateur (18) du système, et ce afin d'assurer que le compresseur (12) dispose d'une quantité d'huile suffisante, quelles que soient les conditions de fonctionnement. Aucune structure/dispositif destinée à réacheminer l'huile vers le compresseur (12) n'est plus nécessaire dans l'évaporateur (18).

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