Compressor and oil supplying structure therefor

Abstract

A compressor and an oil supplying structure therefor are provided. When a compressor is operated at a high speed or low speed, a predetermined amount of oil is supplied to compression pockets formed between a wrap of an orbiting scroll and a wrap of a fixed scroll. Pressure leakage between the wraps may be prevented, thereby enhancing a performance of the compressor. Further, since friction between the orbiting scroll and the fixed scroll may be prevented, abrasion of the components may be minimized.

1 . An oil supplying structure for a scroll compressor, comprising:
 a fixed scroll;   an orbiting scroll disposed adjacent to the fixed scroll to form a compression chamber therebetween; and   at least one oil hole formed in the orbiting scroll through which oil may be supplied into the compression chamber.   
     
     
         2 . The oil supplying structure of  claim 1 , wherein the at least one oil hole extends parallel to a central axis of rotation of a rotational shaft of the orbiting scroll. 
     
     
         3 . The oil supplying structure of  claim 1 , wherein the at least one oil hole extends at an angle to a central axis of rotation of a rotational shaft of the orbiting scroll. 
     
     
         4 . The oil supplying structure of  claim 1 , wherein an inner diameter of the oil hole is less than a diameter of a wrap of the orbiting scroll. 
     
     
         5 . The oil supply structure of  claim 1 , wherein an inner diameter of the at least one oil hole is 2.0˜3.5 mm. 
     
     
         6 . The oil supplying structure of  claim 1 , wherein the at least one oil hole comprises a hole formed extending through a disc portion of the orbiting scroll. 
     
     
         7 . The oil supply structure of  claim 6 , wherein the at least one oil hole further comprises an extending groove formed in one surface of the disc portion and extending a predetermined distance from the hole. 
     
     
         8 . The oil supplying structure of  claim 7 , wherein the extending groove extends in a substantially circumferential direction. 
     
     
         9 . The oil supplying structure of  claim 7 , wherein the extending groove extends toward a central axis of rotation of a rotational shaft of the orbiting scroll. 
     
     
         10 . The oil supplying structure of  claim 7 , wherein the extending groove extends at an angle to a line connecting the at least one oil hole and a central axis of rotation of a rotational shaft of the orbiting scroll. 
     
     
         11 . The oil supplying structure of  claim 7 , further comprising a main frame having a bearing surface on which the orbiting scroll is supported, wherein an oil groove is formed in the bearing surface of the main frame and wherein the extending groove is positioned adjacent to the oil groove formed in the main frame so as to be in fluid communication therewith. 
     
     
         12 . The oil supplying structure of  claim 11 , wherein the oil groove is one of a ring-shaped oil groove or a square oil groove. 
     
     
         13 . The oil supplying structure of  claim 11 , wherein the oil groove has an inner diameter of 3.5˜4.5 mm. 
     
     
         14 . The oil supplying structure of  claim 1 , further comprising a main frame having a bearing surface on which the orbiting scroll is supported, wherein an oil groove is formed in the bearing surface of the main frame and wherein the at least one oil hole is positioned adjacent to so as to be in fluid communication with the oil groove formed in the bearing surface of the main frame. 
     
     
         15 . The oil supplying structure of  claim 14 , wherein the oil groove is one of a ring-shaped oil groove or a square oil groove. 
     
     
         16 . The oil supplying structure of  claim 14 , wherein the oil groove has a depth of 3.5˜4.5 mm. 
     
     
         17 . The oil supplying structure of  claim 14 , wherein the oil groove is in communication with the at least one oil hole continuously. 
     
     
         18 . The oil supplying structure of  claim 14 , wherein the oil groove is in fluid communication with at least one oil hole periodically. 
     
     
         19 . The oil supplying structure of  claim 1 , further comprising a main frame having a bearing surface on which the orbiting scroll is mounted, wherein at least one oil passage is formed in the main frame which is in fluid communication with the at least one oil hole formed in the orbiting scroll. 
     
     
         20 . The oil supplying structure of  claim 19 , wherein the at least one oil passage formed in the main frame extends diagonal to a central axis of rotation of a rotational shaft of the orbiting scroll. 
     
     
         21 . The oil supplying structure of  claim 19 , wherein the at least one oil passage formed in the main frame extends from a first end to a second end opening into an oil groove formed in the bearing surface of the main frame. 
     
     
         22 . The oil supply structure of  claim 21 , further comprising an oil controlling device positioned in the at least one oil passage formed in the main frame. 
     
     
         23 . The oil supplying structure of  claim 21 , wherein the oil groove formed in the main frame is one of a ring-shaped oil groove or a square oil groove. 
     
     
         24 . The oil supplying structure of  claim 21 , wherein the oil groove has a depth of 3.5˜4.5 mm. 
     
     
         25 . The oil supplying structure of  claim 1 , wherein the at least one oil hole has a constant inner diameter. 
     
     
         26 . The oil supplying structure of  claim 1 , further comprising a main frame having a bearing surface on which the orbiting scroll is supported, wherein an oil groove is formed in the bearing surface of the main frame and wherein the oil groove formed in the bearing surface of the main frame is positioned to one side of an orbiting path of the at least one oil hole. 
     
     
         27 . The oil supplying structure of  claim 25 , wherein the oil groove formed in the bearing surface of the main frame is one of a ring shaped oil groove or a square oil groove. 
     
     
         28 . A scroll compressor comprising the oil supplying structure of  claim 1 . 
     
     
         29 . An oil supplying structure for a scroll compressor, comprising:
 a fixed scroll;   an orbiting scroll disposed adjacent to the fixed scroll to form a compression chamber therebetween; and   a main frame having a bearing surface on which the orbiting scroll is supported, and a boss insertion groove into which a boss portion of the orbiting scroll is inserted, wherein at least one oil passage is formed in the main frame through which oil stored in the boss insertion groove is introduced between a disc portion of the orbiting scroll and the bearing surface of the main frame.   
     
     
         30 . The oil supplying structure of  claim 29 , wherein the at least one oil passage extends from the boss insertion groove to the bearing surface of the main frame. 
     
     
         31 . The oil supplying structure of  claim 29 , wherein the at least one central axis of the oil passage extends at an angle to a central axis of rotation of a rotational shaft of the orbiting scroll. 
     
     
         32 . The oil supplying structure of  claim 29 , further comprising an oil controlling device positioned in the at least one oil passage formed in the main frame. 
     
     
         33 . A method of supplying oil to a compression chamber of a scroll compressor comprising a fixed scroll and an orbiting scroll disposed adjacent to the fixed scroll to form the compression chamber, the method comprising:
 providing at least one oil hole formed in the orbiting scroll through which oil may be supplied into the compression chamber; and   positioning the at least one hole adjacent an oil passage formed in a bearing surface of a main frame that supports the orbiting scroll such that upon rotation of the orbiting scroll the at least one oil hole communicates with the oil passage to inject oil one of continuously or periodically into the compression chamber.   
     
     
         34 . The method of  claim 33 , wherein the positioning comprises positioning the at least one hole adjacent the oil passage formed in the bearing surface of the main frame that supports the orbiting scroll such that upon rotation of the orbiting scroll the at least one hole communicates with the oil passage to inject oil continuously into the compression chamber. 
     
     
         35 . The method of  claim 33 , wherein the positioning comprises positioning the at least one oil hole adjacent the oil passage formed in the bearing surface of the main frame that supports the orbiting scroll such that upon rotation of the orbiting scroll the at least one oil hole communicates with the oil passage to inject oil periodically into the compression chamber.