Fluid machine

Abstract

The present invention provides a fluid machine that is capable of reducing noise generated when a fluid such as compressed air passes through a discharge port and that is capable of preventing premature breakage of a discharge valve. The fluid machine comprises a cylinder head 37 that is connected to a cylinder 31 , so that the cylinder head 37 , the cylinder 31 , and a piston 32 define a compression chamber 38 . The cylinder head 37 comprises a suction port through which air is sucked into the compression chamber 38 , a suction valve for opening and closing the suction port, a discharge port 45 through which air is discharged from the compression chamber 38 , and a discharge valve 52 for opening or closing the discharge port 45 . The discharge port 45 comprises a plurality of openings 67.

1 . A fluid machine comprising a discharge port for discharging a fluid and a discharge valve for opening and closing the discharge port, wherein the discharge port comprises a plurality of openings.  
   
   
       2 . A fluid machine according to  claim 1 , wherein the discharge port comprises three or more openings.  
   
   
       3 . A fluid machine according to  claim 2 , wherein the discharge valve has a circular sealing surface and the three or more openings are evenly arranged with respect to the center of the sealing surface as a center.  
   
   
       4 . A fluid machine according to  claim 3 , wherein the three or more openings have the same diameter and are spaced equally in a circumferential direction of the sealing surface.  
   
   
       5 . A fluid machine according to  claim 4 , wherein the discharge valve is a poppet valve made of a synthetic resin.  
   
   
       6 . A fluid machine according to  claim 1 , wherein the fluid machine is an air compressor.  
   
   
       7 . A fluid machine according to  claim 2 , wherein the fluid machine is an air compressor.  
   
   
       8 . A fluid machine according to  claim 3 , wherein the fluid machine is an air compressor.  
   
   
       9 . A fluid machine according to  claim 4 , wherein the fluid machine is an air compressor.  
   
   
       10 . A fluid machine according to  claim 5 , wherein the fluid machine is an air compressor.  
   
   
       11 . A fluid machine according to  claim 1 , wherein the discharge valve comprises a valve body and wherein a resultant force of forces which are applied to the valve body by compressed air discharged through the plurality of openings acts on the center of the valve body in a direction for opening the valve body.