Lubrication system of electric compressor

Abstract

A lubrication system of an electric compressor may include a lower housing having a refrigerant inlet port formed to pierce an outer side plane thereof, a rotational shaft supported rotatably by the lower housing and a frame, a rotor for rotating the rotational shaft, an orbiting scroll disposed on a top portion of the frame to be orbited by the rotational shaft, a fixed scroll disposed on a top portion of the orbiting scroll to allow the orbiting scroll to orbit therein, and an upper housing disposed on a top portion of the fixed scroll and having a refrigerant outlet formed in an outer side plane thereof.

What is claimed is: 
     
         1 . A lubrication system of an electric compressor comprising:
 a lower housing comprising a refrigerant inlet port disposed to pierce an outer side plane thereof;   a rotational shaft supported by the lower housing and a frame;   a rotor for rotating the rotational shaft;   an orbiting scroll disposed on a top portion of the frame to be orbited by the rotational shaft;   a fixed scroll disposed on a top portion of the orbiting scroll to allow the orbiting scroll to orbit therein; and   an upper housing disposed on a top portion of the fixed scroll and comprising a refrigerant outlet disposed in an outer side plane thereof.   
     
     
         2 . The lubrication system according to  claim 1 , wherein the fixed scroll comprises:
 a fixed scroll mirror plate in a disc shape disposed horizontally;   a discharge port piercing a center of the fixed scroll mirror plate in a vertical direction;   an outer side plane disposed to protrude downward along an outer peripheral surface of the fixed scroll mirror plate;   a plurality of suction ports piercing the outer side plane in a horizontal direction;   a fixed scroll wrap in a spiral shape protruding vertically from a bottom plane of the fixed scroll mirror plate; and   a suction chamber that is a space formed between the fixed scroll wrap and the outer side plane.   
     
     
         3 . The lubrication system according to  claim 2 , wherein the upper housing comprises:
 a discharge chamber connected with the discharge port;   an oil separation chamber connected with the discharge chamber and provided with an oil separation tube for separating refrigerant and oil pressurized; and   an oil chamber connected with the oil separation chamber and storing oil separated from the oil separation tube.   
     
     
         4 . The lubrication system according to  claim 3 , wherein the lubrication system comprises an oil groove formed on a top plane of the fixed scroll mirror plate to bypass a bottom plane of the discharge chamber and comprising one end of the oil groove connected with a bottom plane of the oil chamber and where an other end of the oil groove reaches an upper s portion of an outer side end of the fixed scroll wrap. 
     
     
         5 . The lubrication system according to  claim 4 , wherein the orbiting scroll comprises:
 an orbiting scroll mirror plate formed in a disc shape and disposed horizontally;   an orbiting scroll wrap formed in a spiral shape and protruding in a vertical direction from the top plane of the orbiting scroll mirror plate so as to be disposed crisscross at an angle of 180 degrees with respect to the fixed scroll wrap; and   a back pressure hole formed through the orbiting scroll mirror plate in a vertical direction.   
     
     
         6 . The lubrication system according to  claim 5 , wherein the lubrication system comprises a compression chamber for compressing the refrigerant and the oil flowing therein through the suction port, the compression chamber being defined by being surrounded by the fixed scroll mirror plate, the fixed scroll wrap, the orbiting scroll mirror plate and the orbiting scroll wrap. 
     
     
         7 . The lubrication system according to  claim 6 , wherein the lubrication system comprises a back pressure chamber connected with the compression chamber via the back pressure hole, the back pressure chamber being defined by being surrounded by a bottom plane of the orbiting scroll mirror plate and the frame. 
     
     
         8 . The lubrication system according to  claim 7 , wherein the lubrication system comprises a first oil injection hole formed to pierce the top plane of the fixed scroll mirror plate in a vertical direction to communicate fluidly with the oil groove and the compression chamber. 
     
     
         9 . The lubrication system according to  claim 4 , wherein the lubrication system comprises a second oil injection hole formed to pierce the fixed scroll wrap in a vertical direction at the other end of the oil groove. 
     
     
         10 . The lubrication system according to  claim 7 , wherein the lubrication system comprises an eccentric counterweight fastened to an upper end of the rotational shaft and disposed in the back pressure chamber. 
     
     
         11 . The lubrication system according to  claim 1 , wherein the lubrication system comprises a thrust plate disposed between the frame and the orbiting scroll. 
     
     
         12 . The lubrication system according to  claim 11 , wherein the lubrication system comprises an Oldham pin for fastening the frame and the thrust plate. 
     
     
         13 . The lubrication system according to  claim 1 , wherein the lubrication system comprises a lip seal for sealing a space between the frame and the rotational shaft.