Compressor having round part placed near outlet port

Abstract

The present disclosure provides a compressor including a rounded portion surrounding a discharge port, including a cylinder without an oil-blocking structure for ease of shaping the rounded portion, and including a valve-recess cover coupled to the cylinder. At least one valve-recess is defined in an outer face portion of the cylinder. A discharge valve assembly is fixedly received in the valve-recess, wherein the discharge valve assembly is configured for opening and closing the discharge port. The valve-recess is defined between the outer face, primary and secondary side blocks. The rounded portion surrounds the discharge port, to reduce a contact area between the discharge port and the valve assembly.

What is claimed is: 
     
       1. A compressor, comprising:
 a cylinder including a compression chamber, a suction port, and a discharge port opposite to the suction port; 
 a roller disposed in the compression chamber, the roller being eccentric with respect to an inner circumferential face of the cylinder and being configured to rotate within the cylinder; 
 a plurality of vanes moveably inserted in the roller, the vanes being configured to move toward or away from the inner circumferential face of the cylinder and to divide the compression chamber into a plurality of compression sub-chambers; 
 at least onea valve-recess defined in an outer face portion of the cylinder; 
 a discharge valve assembly fixedly received in attached to the valve-recess, the discharge valve assembly being configured to open and to close the discharge port; and 
 a valve-recess cover coupled to the cylinder to cover the valve-recess, the cover including a curvature center coinciding with a curvature center of the cylinder, the cover having a first end and a second end spaced from the first end in a circumferential direction,  
 wherein the outer face portion of the cylinder defining the valve-recess includes: 
 a valve-seated portion; 
 a step portion protruding from the valve-seated portion, one end of the discharge valve assembly being attached to the step portion; and 
 a rounded portion surrounding the discharge port, the rounded portion protruding from the valve-seated portion. 
 
     
     
       2. The compressor of  claim 1 , wherein a height of the step portion relative to the valve-seated portion is equal to a height of the rounded portion relative to the valve-seated portion. 
     
     
       3. The compressor of  claim 1 , wherein the discharge valve assembly includes:
 a discharge valve, a first end of the discharge valve attached to the step portion and a free end of the discharge valve positioned above the rounded portion, the free end being movable to open or close the discharge port; 
 a valve support disposed on the discharge valve, a first end of the valve support attached to the step portion, a spacing between the valve support and a bottom face of the valve-recess increasing along a length of the valve support extending between the step portion and the rounded portion; and 
 a fixing-pin that attaches the discharge valve and the valve support to the step portion. 
 
     
     
       4. The compressor of  claim 3 , wherein the rounded portion includes a central convex portion located between adjacent rounded edge portions. 
     
     
       5. The compressor of  claim 3 , wherein the step portion includes a pin-receiving opening. 
     
     
       6. The compressor of  claim 1 , wherein a radius of curvature of the cylinder differs from a radius of curvature of the valve-recess cover. 
     
     
       7. The compressor of  claim 1 , wherein the discharge port is a first discharge port and the cylinder includes a second discharge port spaced from the first discharge port, and
 wherein the at least one valve-recess includes a firstvalve-recess and a second valve-recesses valve-recess fluidly coupled with the first and second discharge ports, respectively. 
 
     
     
       8. The compressor of  claim 7 , wherein the valve-seated portion includes first and second valve-seated portions, the first valve-seated portion includes the first valve-recess, the second valve-seated portion includes the second valve-recess, and the first valve-seated portion is disposed at an angle relative to an extension direction of the second valve-seated portion. 
     
     
       9. The compressor of  claim 7 , wherein the cylinder includes a protrusion formed between the first valve-recess and the second valve-recess, and the cover is coupled to the cylinder such that an inner circumferential face of the cover contacts the protrusion and both opposite outer circumferential ends of the cylinder. 
     
     
       10. The compressor of  claim 9 , wherein the valve-recess cover includes:
 an inner circumferential face portion; and 
 a groove in the inner circumferential face portion, the protrusion being configured to be received in the groove. 
 
     
     
       11. A compressor, comprising:
 a cylinder including a compression chamber, a suction port and a discharge port opposite to the suction port; 
 a roller disposed in the compression chamber, the roller being eccentric with respect to an inner circumferential face of the cylinder and being configured to rotate within the cylinder; 
 a plurality of vanes moveably inserted in the roller, the vanes being configured to move toward or away from the inner circumferential face of the cylinder and to divide the compression chamber into a plurality of compression sub-chambers; 
 at least onea valve-recess defined in an outer face portion of the cylinder, the valve-recess fluidly coupled with the discharge port; 
 a discharge valve assembly fixedly received in attached to the valve-recess, the discharge valve assembly being configured to open and close the discharge port; and 
 a valve-recess cover coupled to the cylinder to cover the valve-recess, the cover including a curvature center coinciding with a curvature center of the cylinder, 
 wherein 
 the discharge port is a first discharge port and the cylinder includes a second discharge port spaced from the first discharge port, 
 the at least one valve-recess includes first and second valve-recesses fluidly coupled with the first and second discharge ports respectively, 
 the cylinder includes a protrusion between the first valve-recess and the second valve-recess first discharge port and the second discharge port, and 
 an inner circumferential face of the cover contacts the protrusion, 
 wherein the valve-recess cover includes: 
 an inner circumferential face portion; and 
 a groove in the inner circumferential face portion, the protrusion being configured to be received in the groove. 
 
     
     
       12. The compressor of  claim 11 , wherein a radius of curvature of the cylinder differs from a radius of curvature of the valve-recess cover. 
     
     
       13. The compressor of  claim 11 , wherein the outer face portion of the cylinder defining the valve-recess includes:
 a valve-seated portion; 
 a step portion protruding from the valve-seated portion, one end of the discharge valve assembly being attached to the step portion; and 
 a rounded portion surrounding the discharge port, the rounded portion protruding from the valve-seated portion. 
 
     
     
       14. The compressor of  claim 13 , wherein a height of the step portion relative to the valve-seated portion is equal to a height of the rounded portion relative to the valve-seated portion. 
     
     
       15. The compressor of  claim 11 , wherein the valve-recess cover includes:
 an inner circumferential face portion; and   a groove in the inner circumferential face portion, the protrusion being configured to be received in the groove.   
     
     
       16. A compressor comprising:
 a casing;   a drive motor housed in the casing;   a rotatable shaft disposed within the casing;   a primary side block housed in and fixed to the casing;   a secondary side block spaced apart from the primary side block, the primary side block and the secondary side block surrounding the rotatable shaft;   a cylinder interposed between and attached to the primary and secondary side blocks, the cylinder including a compression chamber, a suction port and at least one discharge port opposite to the suction port;   a roller attached to the rotatable shaft and disposed in the compression chamber, the roller being eccentric with respect to an inner circumferential face of the cylinder, and being configured to rotate within the cylinder;   a plurality of slots in the roller;   a plurality of vanes moveably inserted in the slots, the vanes being configured to move toward the inner circumferential face of the cylinder and to divide the compression chamber into a plurality of compression sub-chambers;   at least one valve-recess defined in an outer face portion of the cylinder;   a discharge valve assembly fixedly received in the valve-recess, the discharge valve assembly being configured to open and close the discharge port;   a valve-recess cover coupled to the cylinder to cover the valve-recess, the cover including a curvature center coinciding with a curvature center of the cylinder; and   a discharge chamber being defined by the outer face of the cylinder, an inner circumferential face of the cover, and the primary and secondary side blocks, wherein the discharge chamber is configured to discharge compressed refrigerant through a refrigerant channel into an inner space in the casing,   wherein
 the valve-recess is defined by an outer face of the cylinder, and the primary and secondary side blocks, 
 the discharge port is a first discharge port and the cylinder includes a second discharge port spaced from the first discharge port, 
 the at least one valve-recess includes first and second valve-recesses fluidly coupled with the first and second discharge ports respectively, 
 the cylinder includes a protrusion between the first valve-recess and the second valve-recess, and 
 an inner circumferential face of the cover contacts the protrusion. 
   
     
     
       17. The compressor of  claim 16 , wherein the rotatable shaft extends in a first direction and a dimension of the valve-recess in the first direction is equal to a dimension of the cylinder in the first direction. 
     
     
       18. The compressor of  claim 1 , the cover including a curvature center coinciding with a curvature center of the cylinder. 
     
     
       19. The compressor of  claim 11 , the cover including a curvature center coinciding with a curvature center of the cylinder. 
     
     
       20. The compressor of  claim 11 , wherein the valve-recess includes a first valve-recess and a second valve-recess fluidly coupled with the first and second discharge ports respectively, and
 wherein the protrusion is between the first valve-recess and the second valve-recess.