Co-rotating scroll compressor

Abstract

A co-rotating scroll compressor includes a housing; a driving mechanism; a driving scroll; a driven scroll; and a driven mechanism. The housing having a scroll chamber in which the driving scroll and the driven scroll are accommodated, a storage chamber that separates refrigerant drawn from an outside into gas and liquid and stores liquid refrigerant, and a partition wall that separates the storage chamber from the scroll chamber. The co-rotating scroll compressor includes a scroll compression part formed of the driving scroll and the driven scroll, an oil storage portion provided in the scroll chamber, and a lubricating oil supply passage through which the lubricating oil is supplied to the scroll compression part or a bearing. The lubricating oil supply passage has a lubricating oil cooling portion that cools the lubricating oil in the lubricating oil supply passage with the refrigerant in the storage chamber.

1 . A co-rotating scroll compressor comprising:
 a housing; a driving mechanism; a driving scroll; a driven scroll; and a driven mechanism,   the housing having a scroll chamber in which the driving scroll and the driven scroll are accommodated, a storage chamber that separates a refrigerant drawn from an outside into gas and liquid and stores liquid refrigerant, and a partition wall that separates the storage chamber from the scroll chamber,   the driving scroll being configured to be driven to rotate around a driving axis by the driving mechanism,   the driven scroll being eccentric to the driving scroll, and configured to be driven to rotate around a driven axis by the driving scroll and the driven mechanism,   a supporting portion protruding from the partition wall into the scroll chamber with the driving axis at a center,   the driving scroll being supported by a bearing disposed between the driving scroll and the supporting portion so as to be driven to rotate around the driving axis,   a scroll compression part being formed of the driving scroll and the driven scroll,   an oil storage portion in which lubricating oil is stored being provided in the scroll chamber, and   a lubricating oil supply passage in communication with the oil storage portion, through which the lubricating oil is supplied to the scroll compression part or the bearing, wherein   the lubricating oil supply passage has a lubricating oil cooling portion that cools the lubricating oil in the lubricating oil supply passage with the refrigerant in the storage chamber.   
     
     
         2 . The co-rotating scroll compressor according to  claim 1 , wherein
 the driving scroll has a driving scroll end plate, a driving scroll spiral body that is formed integrally with the driving scroll end plate and protrudes toward the driven scroll in a spiral shape, and a cover body connected to the driving scroll end plate with the driven scroll held between the cover body and the driving scroll end plate,   the driven scroll has a driven scroll end plate, and a driven scroll spiral body that is formed integrally with the driven scroll end plate and protrudes toward the driving scroll end plate in a spiral shape, and   the lubricating oil is supplied from the lubricating oil supply passage to a sliding portion between the driven scroll end plate and the cover body.   
     
     
         3 . The co-rotating scroll compressor according to  claim 1 , wherein
 the lubricating oil is supplied from the lubricating oil supply passage to the bearing, and   the lubricating oil supply passage extends through the supporting portion.   
     
     
         4 . The co-rotating scroll compressor according to  claim 2 , further comprising:
 a driven shaft portion that is eccentric to the driving axis and extends in parallel to the driving axis in the housing; and a bushing into which the driven shaft portion is inserted, wherein   a bushing bearing is disposed between the driven scroll and the bushing,   the lubricating oil is supplied from the lubricating oil supply passage to the bushing bearing, and   the lubricating oil supply passage extends through the driven shaft portion or the bushing.   
     
     
         5 . The co-rotating scroll compressor according to  claim 2 , wherein
 the lubricating oil supply passage extends through the cover body.   
     
     
         6 . The co-rotating scroll compressor according to  claim 1 , wherein
 the lubricating oil cooling portion is formed of a groove that is recessed in a wall surface of the partition wall on the storage chamber side, and a lid that has a plate shape, extends in a direction in which the groove extends, and is fixed to the wall surface so as to close an opening of the groove, and   a passage defined by an inner surface of the groove and the lid forms a part of the lubricating oil supply passage.   
     
     
         7 . The co-rotating scroll compressor according to  claim 1 , wherein
 the lubricating oil cooling portion is formed of a pipe disposed in the storage chamber, and   a passage inside the pipe forms a part of the lubricating oil supply passage.