Compressor

Abstract

A compressor is provided. The compressor includes a motor that generates power to rotate a crank shaft. The motor includes a rotor rotating about a stator supported in a hermetic vessel by an elastic member. A roller is provided eccentric to the center of rotation of the crank shaft and rotates eccentrically to divide the compression chamber into two regions with a vane so as to allow working fluids to be drawn into, compressed discharged from the compression chamber. A compressor so configured minimizes fluidity and friction losses, thereby improving compression efficiency. The working fluids do not have influence upon/from the inside of are not influenced by an environment with the hermetic vessel, and vibration is minimized, thus enhancing compression efficiency and reducing associated noise.

1 . A compressor, comprising:
 a casing having forming a space therein;   a motor supported in the casing by an elastic member, the motor comprising a stator and a rotor electromagnetically coupled so as to generate driving force; and   a compressing device configured to receive the driving force generated by the motor via a crank shaft having a same center of rotation as the rotor, wherein the compressing device comprises:
 a cylinder; 
 a compression chamber provided in the cylinder: 
 a roller provided in the cylinder, eccentric to the center of rotation of the crank shaft; and 
 a vane configured to contact the roller, wherein the roller and the vane are configured to divide the compression chamber into two regions so as to compress fluid in the compression chamber. 
   
   
   
       2 . The compressor of  claim 1 , wherein the compressing device further comprises:
 a main support bearing provided above the stator and configured to rotatably support the crank shaft, wherein the cylinder is provided on the main bearing such that the compression chamber is formed at its center; and   an auxiliary bearing provided on the cylinder and configured to rotatably support an upper end of the crank shaft, wherein an outer face of the roller is configured to sequentially contact an inner circumferential surface of the compression chamber so as to compress fluid therein, and wherein the vane is configured to extend from the inner circumferential surface of the compression chamber such that a proximal end of the vane contacts the roller so as to partition the compression chamber into two regions.   
   
   
       3 . The compressor of  claim 2 , wherein the compression chamber is defined by the auxiliary bearing on a top end, by the main bearing on a bottom end, and by an inner circumferential surface of the cylinder at its outer periphery. 
   
   
       4 . The compressor of  claim 3 , wherein the roller is configured to maintain rolling contact with an inner circumferential surface of the cylinder, and the vane is configured to maintain contact with an outer circumferential surface of the roller so as to divide the compression chamber into two regions. 
   
   
       5 . The compressor of  claim 1 , further comprising:
 a suction pipe extending through the casing;   a silencer coupled to the suction pipe; and   a supply pipe extending from the silencer to the compression chamber.   
   
   
       6 . The compressor of  claim 5 , further comprising a connector pipe having a first end in communication with the discharge space via the discharge cover, and a second end in communication with a discharge pipe passing through the casing. 
   
   
       7 . The compressor of  claim 5 , wherein fluid provided by the suction pipe is guided through the silencer and the supply pipe and into the compression chamber through a suction hole in the roller. 
   
   
       8 . The compressor of  claim 7 , further comprising:
 a discharge cover provided on the auxiliary bearing so as to define a discharge space;   a discharge hole formed in the roller; and   a discharge valve configured to control a flow of compressed fluid through the discharge hole and into the discharge space.   
   
   
       9 . The compressor of  claim 1 , wherein the crank shaft comprises an oil passage formed along an internal portion and outer face thereof so as to draw oil upward from a lower portion of the casing and to transfer the oil to a heating section and a friction section of the compressor. 
   
   
       10 . A compressor, comprising:
 a casing forming a space therein;   a motor provided in the casing, the motor having a stator and a rotor electromagnetically coupled so as to generate a driving force; and   a compressing device having a cylinder configured to form a compression chamber, wherein the compressing device is configured to receive the driving force generated by the motor via a crank shaft having a same center of rotation as the rotor, and to compress fluid in the compression chamber;   a silencer configured to supply fluid from outside of the casing to the compression chamber of the compressing device; and   a connector pipe configured to receive fluid compressed in the compressing device and to transfer the compressed fluid outside of the casing.   
   
   
       11 . The compressor of  claim 10 , wherein the stator is supported in the casing by an elastic member. 
   
   
       12 . The compressor of  claim 11 , wherein the stator is fixed to a lower portion of the compressing device so that the compressing device is substantially supported by the elastic member supporting the stator. 
   
   
       13 . The compressor of  claim 12 , wherein the compressing device includes:
 a main bearing configured to rotatably support the crank shaft, wherein the cylinder is configured to be installed on the main bearing;   an auxiliary bearing configured to be installed on the cylinder so as to rotatably support an upper end of the crank shaft, and to define the compression chamber together with the cylinder and the main bearing;   a roller provided in the cylinder, eccentric to the center of rotation of the crank shaft, wherein an outer circumferential surface of the roller is configured to maintain rolling contact with an inner circumferential surface of the compression chamber so as to compress fluid in the compression chamber; and   a vane extending through the inner circumferential surface of the cylinder, wherein a distal end of the vane is configured to contact an outer circumferential surface of the roller so as to divide the compression chamber into two regions.   
   
   
       14 . The compressor of  claim 13 , further comprising a suction hole and a discharge hole formed in the compression chamber so as to allow working fluids to flow into and out of the compression chamber, respectively, wherein the suction hole is in communication with the silencer and the discharge hole is opened and closed by a discharge valve. 
   
   
       15 . The compressor of  claim 14 , wherein the crank shaft comprises an oil passage formed along an internal portion and outer surface thereof, wherein the oil passage is configured to draw oil upward from a lower portion of the casing and to transfer the oil to a heating section and a friction section of the compressor. 
   
   
       16 . The compressor of  claim 13 , wherein the compression chamber is defined by the auxiliary bearing on a top end, by the main bearing on a bottom end, and by an inner circumferential surface of the cylinder at its outer periphery. 
   
   
       17 . The compressor of  claim 13 , further comprising an elastic member configured to elastically support a proximal end of the vane. 
   
   
       18 . A compressor, comprising:
 a casing forming a space therein;   a motor provided in the casing, the motor comprising a stator and a rotor electromagnetically coupled so as to generate driving force; and   a compressing device comprising a stationary scroll and a rotating scroll configured to receive the driving force generated by the motor via a crank shaft having a same center of rotation as the rotor, wherein the compression device is configured to compress fluids through a relative rotation of the stationary and rotating scrolls.   
   
   
       19 . The compressor of  claim 18 , further comprising:
 a suction pipe extending through the casing;   a silencer in communication with the suction pipe; and   a supply pipe extending from the silencer to the compressing device.   
   
   
       20 . The compressor of  claim 19 , further comprising a discharge cover provided at an upper side of the compressing device and configured to define a discharge space, wherein fluids compressed in the compression device are discharged to the discharge space. 
   
   
       21 . The compressor as claimed in  claim 20 , further comprising a connector pipe having a first end thereof in communication with the discharge space through the discharge cover, and a second end thereof in communication with a discharge pipe passing through the casing. 
   
   
       22 . A compressor, comprising:
 a casing;   a motor provided in the casing, the motor comprising a rotor electromagnetically coupled to a stator so as to generate a driving force;   a compressing device coupled to the motor via a shaft, wherein the compressing device comprising:
 a cylinder; 
 a roller provided in the cylinder, wherein an outer circumferential surface of the toiler is configured to maintain rolling contact with an inner circumferential surface of the cylinder; 
 a vane extending from the inner circumferential surface of the cylinder and configured to contact the outer circumferential surface of the roller, wherein the vane and the roller are configured to divide a compression space formed by the inner circumferential surface of the cylinder into two regions so as to compress fluid contained within the compression chamber. 
   
   
   
       23 . The compressor of  claim 22 , wherein the shaft has a same center of rotation as the rotor, and wherein the roller is provided in the cylinder eccentric to the center of rotation of the shaft. 
   
   
       24 . The compressor of  claim 22 , wherein the compressing device further comprises:
 a main bearing disposed between an upper portion of the stator and a lower portion of the cylinder, wherein the main bearing is configured to rotatably support a corresponding portion of the shaft; and   an auxiliary bearing positioned on a top portion of the cylinder and configured to rotatably support an upper end of the shaft.   
   
   
       25 . The compressor of  claim 24 , wherein the compression chamber is defined by the auxiliary bearing on a top end, by the main bearing on a bottom end, and by an inner circumferential surface of the cylinder at its outer periphery. 
   
   
       26 . The compressor of  claim 22 , wherein a lower portion of the compressing device is coupled to an upper portion of the stator, and wherein the compressor further comprises an elastic member provided in the casing and configured to elastically support the motor and to elastically support the compressing device coupled thereto. 
   
   
       27 . The compressor of  claim 22 , further comprising:
 a suction pipe extending through the casing;   a silencer coupled to the suction pipe;   a supply pipe extending from the silencer to the compression chamber; and   a suction hole formed in the roller, wherein fluid provided by the suction pipe is guided through the silencer and the supply pipe and into the compression chamber through the suction hole.   
   
   
       28 . The compressor of  claim 27 , further comprising:
 a discharge cover provided on the auxiliary bearing so as to define a discharge space;   a discharge hole formed in the roller;   a discharge valve configured to control a flow of compressed fluid through the discharge hole and into the discharge space; and   a connector pipe having a first end in communication with the discharge space via the discharge cover, and a second end in communication with a discharge pipe extending through the casing, wherein fluid compressed in the compression chamber is discharged to the discharge space through the discharge hole, directed through the connector pipe, and then discharged to an outside of the casing through the discharge pipe.   
   
   
       29 . The compressor of  claim 22 , further comprising an oil passage extending through the shaft, wherein the oil passage is configured to guide oil from a bottom portion of the casing to a heating portion and a friction portion of the compressor.