Rotary compressor

Abstract

A rotary compressor for preventing, to the maximum extent possible, oil within the compressor from being discharged to a gas discharge port. The rotary compressor includes a drive device and a compression device which are mounted in a hermetic container. The hermetic container includes an upper cover formed with a gas discharge port. The rotary compressor includes a scroll chamber defined in an inner surface of the upper cover around the discharge port, to separate oil from gas to be discharged, and a discharge guiding member installed inside the upper cover, to guide the gas, discharged from the hermetic container, into the scroll chamber and to guide the gas, having passed through the scroll chamber, to the discharge port.

1 . A rotary compressor comprising a hermetic container, and a drive device and a compression device mounted in the hermetic container, the hermetic container having an upper cover formed with a gas discharge port, the rotary compressor further comprising:
 a scroll chamber defined in an inner surface of the upper cover around the discharge port, to separate oil from gas to be discharged; and   a discharge guiding member installed inside the upper cover, to guide the gas, discharged from the hermetic container, into the scroll chamber and to guide the gas, having passed through the scroll chamber, to the discharge port.   
   
   
       2 . The rotary compressor according to  claim 1 , wherein the scroll chamber is opened downwardly and comprises an inner curved surface upwardly recessed from the inner surface of the upper cover, the scroll chamber being circularly disposed around the discharge port. 
   
   
       3 . The rotary compressor according to  claim 2 , wherein the discharge guiding member comprises:
 a circular plate portion installed below the discharge port so as to be spaced apart from the inner surface of the upper cover, an outer diameter of the circular plate portion being determined such that a rim of the circular plate portion is located close to the scroll chamber; and   a protrusion portion protruding from an upper surface of the circular plate portion toward the discharge port, to guide discharge of the gas.   
   
   
       4 . The rotary compressor according to  claim 3 , further comprising:
 a discharge flow path provided between the upper cover and the discharge guiding member to guide the gas from the scroll chamber to the discharge port, the discharge flow path having an U-shaped oil trap for separation of the oil from the gas; and   an oil discharge hole formed in the discharge guiding member to discharge the oil gathered in a bottom region of the U-shaped oil trap.   
   
   
       5 . The rotary compressor according to  claim 4 , wherein the upper cover comprises a bell-mouse shaped inner surface forming a top surface of the discharge flow path, and the protrusion portion comprises a conical outer surface spaced apart from the bell-mouse shaped inner surface, the conical outer surface forming a bottom surface of the discharge flow path. 
   
   
       6 . The rotary compressor according to  claim 5 , wherein the conical outer surface of the protrusion portion and the upper surface of the circular plate portion form a continuous curved surface together. 
   
   
       7 . The rotary compressor according to  claim 5 , wherein the upper surface of the circular plate portion comprises an U-shaped curved surface forming a bottom surface of the U-shaped oil trap, the U-shaped curved surface and the conical outer surface of the protrusion portion forming a continuous curved surface together. 
   
   
       8 . The rotary compressor according to  claim 5 , further comprising:
 a first raised oil-shield portion taking the form of a stepped portion provided at a boundary between the bell-mouse shaped inner surface of the upper cover and the scroll chamber and a second raised oil-shield portion taking the form of a convex curved portion provided on the rim of the circular plate portion, for separating the oil from the gas being introduced into the discharge flow path.   
   
   
       9 . The rotary compressor according to  claim 8 , wherein the discharge port is provided at the center of the upper cover, and
 centers of the discharge port, the scroll chamber, and the discharge guiding member coincide with one another.   
   
   
       10 . The rotary compressor according to  claim 3 , wherein at least one whirling blade is formed at an outer surface of the protrusion portion, to whirl the gas flowing to the discharge port. 
   
   
       11 . The rotary compressor according to  claim 3 , wherein an inclined guiding surface is provided at the rim of the circular plate portion, to guide the rising gas from the interior of the hermetic container into the scroll chamber. 
   
   
       12 . The rotary compressor according to  claim 3 , further comprising:
 a spacer member interposed between the discharge guiding member and the inner surface of the upper cover; and   a fastening member to secure the discharge guiding member to the upper cover.   
   
   
       13 . The rotary compressor according to  claim 4 , wherein the drive device comprises a stator secured to an inner surface of the hermetic container and a rotor rotatably installed inside the stator, and
 the oil discharge hole is inclined toward the center of the rotor.   
   
   
       14 . A rotary compressor, comprising:
 a hermetic container having an upper cover formed with a gas discharge port;   a drive device and a compression device mounted in the hermetic container;   an oil collecting device to separate oil from gas to be discharged,   wherein the oil collecting device comprises:
 a scroll chamber formed as an inner curved surface upwardly recessed from the inner surface of the upper cover and circularly disposed around the gas discharge port, 
 a discharge guiding member to guide the gas discharged from the hermetic container into the scroll chamber. 
   
   
   
       15 . The rotary compressor according to  claim 14 , wherein the discharge guiding member comprises:
 a circular plate portion installed below the discharge port and spaced apart from the inner surface of the upper cover; and   a protrusion portion protruding from an upper surface of the circular plate portion toward the discharge port, to guide discharge of the gas.   
   
   
       16 . The rotary compressor according to  claim 15 , further comprising:
 a U-shaped oil trap for separation of the oil positioned between the upper cover and the discharge guiding member; and   an oil discharge hole formed in the discharge guiding member to discharge the oil gathered in a bottom region of the U-shaped oil trap.   
   
   
       17 . The rotary compressor according to  claim 15 , further comprising:
 a first raised oil-shield portion formed as a stepped portion in the inner surface of the upper cover; and   a second raised oil-shield portion formed as a convex curved portion provided on the rim of the circular plate portion.   
   
   
       18 . The rotary compressor according to  claim 15 , further comprising at least one whirling blade formed at an outer surface of the protrusion portion.