Protective device for a high side co-rotating scroll compressor

Details Protective device for a high side co-rotating scroll compressor Protective device for a high side co-rotating scroll compressor

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 23/00 (2006.01)

Patent

CA 2211688

A high side co-rotating refrigerant scroll compressor having an oil sump (64) in the discharge pressure portion (20) of its shell is protected from the abnormal conditions of high discharge pressure and reverse direction scroll rotation by a normally closed valve arrangement (74, 75) which defines a flow path that selectively opens into the suction pressure (22) or discharge pressure portion of the compressor shell dependent upon the nature of the abnormal operating condition. The valve arrangement includes a standoff portion which permits the valve arrangement and the flow path it defines to traverse the oil sump and open into the discharge pressure portion of the shell at an elevation above the level of oil in the sump.

Un compresseur hélicoïdal pour réfrigérant du type co-rotatif monté sur le côté haute pression ayant un carter à huile (64) sur le refoulement (20) du compresseur est protégé contre les dégâts qui pourraient être occasionnés par des incidents tels qu'une pression de refoulement excessive et la rotation en sens inverse des éléments hélicoïdaux, par une valve (74, 75) qui est normalement fermée et qui s'ouvre sélectivement sur le côté aspiration (22) ou refoulement du compresseur en fonction de la nature de l'incident. Le système de valve est surélevé pour que la valve et le circuit d'écoulement qu'elle définit traversent le carter à huile et débouchent sur le côté refoulement du compresseur à une certaine hauteur au-dessus du niveau d'huile dans le carter.

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