Compressor

Abstract

A compressor includes fixed and movable side members. The fixed side member has a discharge port opened/closed by adischarge port. The discharge valve has a valve body which closes/opens an outlet end of the discharge port. An area of an inlet end of the discharge port is Ai, a peripheral length of the inlet end is Li, and a hydraulic diameter Di of the inlet end is 4(Ai/Li). A peripheral length of the outlet end of the discharge port is Lo, a reference lift amount of the valve body is ho, a cross sectional area Ao of an outlet side flow path formed between the outlet end of the discharge port and the valve body is Lo×ho, and a hydraulic diameter Do of the outlet side flow path is 4(Ao/2Lo). A ratio (Do/Di) is 0.25 or more and 0.5 or less.

1 . A compressor comprising:
 a fixed side member forming a compression chamber; and   a movable side member which is rotated and changes a volume of the compression chamber,   the compressor being configured to suck a fluid into the compression chamber and to compress the fluid,   the fixed side member being provided with
 a discharge port that penetrates the fixed side member and leads the fluid out of the compression chamber, and 
 a discharge valve that opens/closes the discharge port, 
   the discharge valve having a valve body which closes the discharge port by covering an outlet end of the discharge port and opens the discharge port by being titled from the outlet end of the discharge port,   an area of an inlet end of the discharge port being Ai, a peripheral length of the inlet end being Li, and a hydraulic diameter Di of the inlet end being defined by Di=4(Ai/Li),   a peripheral length of the outlet end of the discharge port being Lo, a reference lift amount of the valve body being ho, a cross sectional area Ao of an outlet side flow path formed between the outlet end of the discharge port and the valve body being defined by Ao=Lo×ho, and a hydraulic diameter Do of the outlet side flow path being defined by Do=4(Ao/2Lo), and   a ratio (Do/Di) of the hydraulic diameter Do of the outlet side flow path to the hydraulic diameter Di of the inlet end of the discharge port being 0.25 or more and 0.5 or less.   
     
     
         2 . The compressor of  claim 1 , wherein the ratio (Do/Di) of the hydraulic diameter Do of the outlet side flow path to the hydraulic diameter Di of the inlet end of the discharge port is 0.4 or less. 
     
     
         3 . (canceled) 
     
     
         4 . The compressor of  claim 1 , wherein
 the fixed side member is provided with a chamfered portion along an entire periphery of the outlet end of the discharge port.   
     
     
         5 . The compressor of  claim 6 , wherein
 a height H of a chamfered portion in an axial direction of the discharge port and a width W of the chamfered portion in a direction orthogonal to the axial direction of the discharge port satisfy a relationship of 0<H/W<0.5.   
     
     
         6 . The compressor of  claim 1 , wherein
 a cross sectional shape of the discharge port is oblong or an ellipse   
     
     
         7 . The compressor of  claim 2 , wherein
 the fixed side member is provided with a chamfered portion along an entire periphery of the outlet end of the discharge port.   
     
     
         8 . The compressor of  claim 2 , wherein
 a cross sectional shape of the discharge port is oblong or an ellipse.   
     
     
         9 . The compressor of  claim 3 , wherein
 a cross sectional shape of the discharge port is oblong or an ellipse.   
     
     
         10 . The compressor of  claim 8 , wherein
 a height H of a chamfered portion in an axial direction of the discharge port and a width W of the chamfered portion in a direction orthogonal to the axial direction of the discharge port satisfy a relationship of 0<H/W<0.5.   
     
     
         11 . The compressor of  claim 9 , wherein
 a height H of the chamfered portion in an axial direction of the discharge port and a width W of the chamfered portion in a direction orthogonal to the axial direction of the discharge port satisfy a relationship of 0<H/W<0.5.