Variable-capacity compressor control valve

Abstract

Provided is a variable-capacity compressor control valve where a valve body can be easily machined and the machining time and machining cost can be reduced without a decrease in the valve closing property or a decrease in the slidability of the valve element due to shaft misalignment. The valve body includes a support member having formed therein a valve orifice and a guide hole into which the valve element is adapted to be slidably fitted and inserted; and a body member having formed therein a Ps inlet/outlet port, a Pd introduction port, and a Pc inlet/outlet port. The support member is fixedly inserted into a recess hole provided in the body member. In addition, a chip sealing portion (pocket portion) for sealing chips of the body member and/or the support member is provided between the body member and the support member.

What is claimed is: 
     
         1 . A variable-capacity compressor control valve comprising
 a valve body including a valve chamber with a valve orifice, a Ps inlet/outlet port communicating with a suction chamber of a compressor, a Pd introduction port arranged upstream of the valve orifice and communicating with a discharge chamber of the compressor, and a Pc inlet/outlet port arranged downstream of the valve orifice and communicating with a crank chamber of the compressor;   a valve element adapted to open or close the valve orifice;   an electromagnetic actuator with a plunger for moving the valve element in a direction to open or close the valve orifice;   a pressure-sensitive chamber adapted to receive a suction pressure Ps from the compressor via the Ps inlet/outlet port; and   a pressure-sensitive reaction member adapted to urge the valve element in the direction to open or close the valve orifice in accordance with a pressure in the pressure-sensitive chamber, wherein   the valve body includes a support member and a body member, the support member having formed therein the valve orifice and a guide hole into which the valve element is adapted to be slidably fitted and inserted, and the body member having formed therein the Ps inlet/outlet port, the Pd introduction port, and the Pc inlet/outlet port, and   the support member is fixedly inserted into a recess hole provided in the body member.   
     
     
         2 . The variable-capacity compressor control valve according to  claim 1 , wherein
 the recess hole includes an upper large-diameter hole and a lower small-diameter hole,   the support member includes a fit-insertion portion adapted to be inserted into the recess hole, the fit-insertion portion including an upper large-diameter portion and a lower small-diameter portion, and   the support member is fixedly inserted into the recess hole in at least one of a posture in which the upper large-diameter portion is fitted into the upper large-diameter hole or a posture in which the lower small-diameter portion is fitted into the lower small-diameter hole.   
     
     
         3 . The variable-capacity compressor control valve according to  claim 2 , wherein
 the support member is fixedly inserted into the recess hole in a posture in which the upper large-diameter portion is fitted into the upper large-diameter hole and a gap is provided between an inner periphery of the lower small-diameter hole and an outer periphery of the lower small-diameter portion, and   the valve orifice is located below a lower end of the lower small-diameter portion, and the lower small-diameter portion has formed therein a horizontal hole communicating with the Pd introduction port of the body member via the gap.   
     
     
         4 . The variable-capacity compressor control valve according to  claim 1 , further comprising a chip sealing portion between the body member and the support member, the chip sealing portion being adapted to seal chips of at least one of the body member or the support member. 
     
     
         5 . The variable-capacity compressor control valve according to  claim 4 , wherein the chip sealing portion is defined by an annular protrusion provided on one of a bottom surface of the recess hole or an opposite surface of the support member that is opposite the bottom surface of the recess hole. 
     
     
         6 . The variable-capacity compressor control valve according to  claim 4 , wherein the chip sealing portion is defined by an annular protrusion provided on one of an upward stepped surface of the recess hole that has a step formed thereon or an opposite surface of the support member that is opposite the upward stepped surface of the recess hole. 
     
     
         7 . The variable-capacity compressor control valve according to  claim 5 , wherein a tip end of the annular protrusion has an acute angle. 
     
     
         8 . The variable-capacity compressor control valve according to  claim 4 , wherein
 each of an inner periphery of the recess hole and an outer periphery of the fit-insertion portion, which is adapted to be inserted into the recess hole, of the support member has a step formed thereon, and   the chip sealing portion is defined by an annular inclined surface that is provided on a downward stepped surface of the fit-insertion portion such that the annular inclined surface abuts a corner on an inner side of an upward stepped surface of the recess hole.   
     
     
         9 . The variable-capacity compressor control valve according to  claim 1 , wherein the support member is formed of a material with higher hardness than a material of the body member. 
     
     
         10 . The variable-capacity compressor control valve according to  claim 9 , wherein
 the support member is formed of a stainless steel material, and   the body member is formed of one of an aluminum material, a brass material, or a resin material.