Compressor and suction valve structure

Abstract

In a valve structure according to the present invention, a suction valve is formed with a suction valve main body, and an opposing part that is integrally formed on a suction valve main body, and faces a suction hole and a valve seat at the opening edge of the suction hole so as to be able to open and close the suction hole, and clearance forming means, which forms a predetermined clearance between the opposing part and the valve seat by isolating the opposing part from the valve seat by a predetermined distance, is formed on at least one of the valve plate and the suction valve.

1 . A compressor comprising: 
 a cylinder block which has a cylinder bore to accommodate a piston;    a crank chamber which is provided at one end of the cylinder block;    a suction chamber and a discharge chamber that are provided at the other end of the cylinder block;    a valve that is provided between the cylinder bore and the suction chamber and between the cylinder bore and the discharge chamber;    a valve plate provided with the valve and having a suction hole to communicate between the cylinder bore and the suction chamber and a discharge hole to communicate between the cylinder bore and the discharge chamber;    a suction valve provided with the valve and assemble to the side of the cylinder bore of the valve plate, and the suction valve is comprised of a flexible plate to be able to open and close the suction hole;    a drive shaft that is rotatably and axially supported within the crank chamber to reciprocally actuate the piston; and    a valve structure in which the suction valve is formed with a suction valve main body, and an opposing part that is integrally formed on the suction valve main body, and faces the suction hole and a valve seat at the opening edge of the suction hole so as to be able to open and close the suction hole, and clearance forming means, which forms a predetermined clearance between the opposing part and the valve seat by isolating the opposing part from the valve seat by a predetermined distance, is formed on at least one of the valve plate and the suction valve, wherein there is no gap in the valve structure except for the opposing part.    
   
   
       2 . The compressor according to  claim 1 , wherein 
 the clearance forming means comprises a coating layer having a predetermined thickness coated on at least one of the valve plate main body excluding the valve seat at the opening edge of the suction hole and the suction main body.    
   
   
       3 . (canceled)  
   
   
       4 . (canceled)  
   
   
       5 . The compressor according to  claim 1 , wherein 
 the clearance forming means comprises a concave portion provided by having a range where at the edge of the suction hole of the valve plate including the valve seat and is formed thinner than the other valve plate main body,    and wherein a groove formed thinner than the valve seat is provided in periphery of the valve seat so that the groove surrounds the suction hole.    
   
   
       6 . The compressor according to  claim 1 , wherein 
 the clearance forming means comprises a concave portion provided by having a range where at the edge of the suction hole of the valve plate including the valve seat and is formed thinner than the other valve plate main body,    and wherein a groove is provided around the valve seat, and width of the groove of a one part is bigger than the width of other parts of the groove.    
   
   
       7 . The compressor according to  claim 5  or  6 , wherein 
 the upper surface of the valve seat is chamfered or rounded.    
   
   
       8 . (canceled)  
   
   
       9 . The compressor according to  claim 5 , wherein an outer edge step of the groove is chamfered or rounded.  
   
   
       10 . The compressor according to  claim 1 , wherein the clearance forming means is comprised of a groove formed in the suction valve.