Scroll compressor

Abstract

Provided is a scroll compressor including: a housing; a frame; a fixed scroll, an orbiting scroll including a boss portion; a shaft including an eccentric portion insertable into the boss and an oil passage; a bearing member couplable to the shaft, configured to rotate together with the shaft, and including a boss receiving groove in which the boss portion is insertable; a first bearing between the frame and the bearing member; and a second bearing between the boss portion and the eccentric portion, the second bearing configured to overlap at least partially with the first bearing in a radial direction of the first bearing, wherein the frame includes an oil discharge passage and based on the eccentric portion being inserted into the boss portion, the oil discharge passage is formed to pass through a portion of the frame such that oil is discharged.

1 . A scroll compressor comprising:
 a housing;   a frame fixed inside the housing;   a fixed scroll couplable to the frame and fixable inside the housing;   an orbiting scroll configured to perform orbiting motion relative to the fixed scroll and including a boss portion;   a shaft including an eccentric portion insertable into the boss portion to transmit rotational force to the boss portion, and an oil passage;   a bearing member couplable to the shaft, configured to rotate together with the shaft, and including a boss receiving groove in which the boss portion is insertable;   a first bearing between the frame and the bearing member to rotatably support the bearing member; and   a second bearing between the boss portion and the eccentric portion to rotatably support the eccentric portion, the second bearing configured to overlap at least partially with the first bearing in a radial direction of the first bearing,   wherein the frame includes an oil discharge passage and based on the eccentric portion being inserted into the boss portion, the oil discharge passage is formed to pass through at least a portion of the frame such that oil is discharged from the boss receiving groove to a side surface of the frame.   
     
     
         2 . The scroll compressor of  claim 1 , wherein
 the housing has a sump formed at a lower side configured to store the oil, and   the oil passage extends from a lower surface of the shaft to an upper surface of the shaft to guide the oil from the sump to the upper surface of the shaft.   
     
     
         3 . The scroll compressor of  claim 1 , wherein
 the bearing member further includes a first bearing passage configured to supply the oil to the first bearing; and   the first bearing passage connects an inner side surface of the bearing member forming the boss receiving groove and an outer side surface of the bearing member configured to contact the first bearing.   
     
     
         4 . The scroll compressor of  claim 3 , wherein
 the shaft further includes a second bearing passage configured to supply the oil to the second bearing, and   the second bearing passage connects a side of the oil passage and a side surface of the eccentric portion provided to contact the second bearing.   
     
     
         5 . The scroll compressor of  claim 1 , wherein
 the oil discharge passage includes an inlet portion configured to form a space between the first bearing and the frame such that the oil from the boss receiving groove is introduced into an area between the first bearing and an inner side surface of the frame.   
     
     
         6 . The scroll compressor of  claim 5 , wherein
 the inlet portion is formed by at least a portion of the inner side surface of the frame being recessed radially outward of the frame, and   a cross-sectional shape of the inlet portion is a semicircle or an arc.   
     
     
         7 . The scroll compressor of  claim 5 , wherein
 the oil discharge passage further includes a connection portion configured to connect the inlet portion and an outer side surface of the frame to guide the oil from the inlet portion to the outer side surface of the frame.   
     
     
         8 . The scroll compressor of  claim 7 , wherein
 the oil discharge passage further includes a discharge portion configured to form a space between the outer side surface of the housing and an inner side surface of the housing such that the oil introduced into one side of the connection portion via the inlet portion is discharged to an area between the inner side surface of the housing and the outer side surface of the frame.   
     
     
         9 . The scroll compressor of  claim 8 , wherein
 the discharge portion is formed by at least a portion of the outer side surface of the frame being recessed radially inward of the frame.   
     
     
         10 . The scroll compressor of  claim 8 , wherein
 the connection portion is formed to pass through the frame in a radial direction of the frame to connect a side of the inlet portion and a side of the discharge portion.   
     
     
         11 . The scroll compressor of  claim 8 , wherein
 the connection portion is formed to pass through the frame to connect a side of the inlet portion and a side of the discharge portion, and   the connection portion is configured to slope downward in a direction toward a radially outer side of the frame.   
     
     
         12 . The scroll compressor of  claim 1 , further comprising a guide member arranged below the frame to guide the oil discharged through the oil discharge passage radially outward of the frame. 
     
     
         13 . The scroll compressor of  claim 12 , wherein
 the guide member further includes a first guide portion arranged below the oil discharge passage and positioned inside the oil discharge passage in a radial direction of the frame.   
     
     
         14 . The scroll compressor of  claim 13 , wherein
 the guide member further includes a second guide portion connected to a lower end of the first guide portion and configured to slope downward from the lower end of the first guide portion toward a radially outer side of the frame.   
     
     
         15 . The scroll compressor of  claim 14 , wherein
 the guide member further includes a third guide portion connected to a lower end of the second guide portion and extending vertically from the lower end of the second guide portion.