Hermetic compressor

Abstract

In a stopper, by providing, in a position corresponding to a movable end vicinity of a discharge reed, a first regulation part having a predetermined clearance from the movable end vicinity of the discharge reed, since a hermetic compressor has such a two-stage spring characteristic that, until the movable end vicinity of the discharge reed touches the first regulation part, a spring characteristic is weak and, after the touch, the spring characteristic is strong, and there is obtained a discharge valve device which is easy to open and whose closing speed is rapid, it is possible to improve a delay in closing.

1 . A hermetic compressor comprising:
 a cylinder in which a piston performs a reciprocating motion;   a valve plate sealing an open end of the cylinder and having a discharge valve device in a side reverse to the cylinder; and   a head in which a discharge chamber for accommodating the discharge valve device is formed,   the discharge valve device including:
 a discharge hole communicating into the cylinder provided in the valve plate; 
 a valve seat part formed in a side reverse to the cylinder at the discharge hole; 
 a discharge reed formed of a leaf spring material and having an opening/closing part for opening and closing the discharge hole; and 
 a stopper regulating an opening quantity of the discharge reed, and including a first regulation part having a predetermined clearance from the discharge reed at a position corresponding to a movable end vicinity of the discharge reed. 
   
     
     
         2 . The hermetic compressor of  claim 1 , wherein the stopper includes a second regulation part having a clearance, which is wider than that of the first regulation part, at the position corresponding to the opening/closing part vicinity of the discharge reed. 
     
     
         3 . The hermetic compressor of  claim 1 , wherein the discharge reed and the stopper are fixed to the valve plate. 
     
     
         4 . The hermetic compressor of  claim 1 , wherein the stopper is molded in the head. 
     
     
         5 . The hermetic compressor of  claim 2 , wherein touching faces of the first regulation part and the second regulation part are made of a solid lubricating material.