Suction throttle mechanism of compressor

Abstract

A suction throttle mechanism of a compressor includes a valve body, a valve seat, and a valve housing. The valve housing and the valve seat are formed as separate bodies, and the valve housing and the valve seat are spaced away from each other. The valve housing has guide portions which make sliding contact with the valve body to thereby allow the valve body to move in a contact-separate direction. When the valve body is separated from the valve seat, a fluid flowing from an inlet port toward the valve body through the valve seat passes between the valve seat and the valve housing to enter a suction chamber.

What is claimed is: 
     
         1 . A suction throttle mechanism of a compressor, the suction throttle mechanism comprising:
 a valve seat disposed in a suction passage between an inlet port and a suction chamber of the compressor and formed in a cylindrical shape for passing a fluid through the valve seat;   a valve body moving in the suction passage in a contact-separate direction in which the valve body is to contact or separate from the valve seat to thereby adjust an opening of the suction passage; and   a valve housing accommodating an urge member urging the valve body toward the valve seat,   the valve housing and the valve seat being formed as separate bodies, the valve housing and the valve seat being spaced away from each other,   the valve housing having a guide portion sliding in contact with the valve body to thereby allow the valve body to move in the contact-separate direction,   when the valve body is separated from the valve seat, a fluid flowing from the inlet port toward the valve body through the valve seat passing between the valve seat and the valve housing to enter the suction chamber.   
     
     
         2 . The suction throttle mechanism of a compressor according to  claim 1 , wherein
 the valve body has a through hole provided in a direction in which the valve body is to contact or separate from the valve seat, and   the guide portion includes a column portion inserted in the through hole and making sliding contact with an inner peripheral surface of the through hole to thereby guide the valve body.   
     
     
         3 . The suction throttle mechanism of a compressor according to  claim 2 , wherein a leading end of the column portion extends in the valve seat. 
     
     
         4 . The suction throttle mechanism of a compressor according to  claim 2 , wherein a leading end of the column portion has a tapered shape gradually decreasing in a direction of approaching the valve seat. 
     
     
         5 . The suction throttle mechanism of a compressor according to  claim 2 , wherein
 the urge member is a coil spring, and   the column portion extends inside an inner periphery of the coil spring.   
     
     
         6 . The suction throttle mechanism of a compressor according to  claim 2 , wherein
 the valve housing, the valve body, and the column portion form a valve chamber, and   the valve housing has a vent hole formed for allowing an inside of the valve chamber to communicate with the suction chamber.   
     
     
         7 . The suction throttle mechanism of a compressor according to  claim 1 , wherein the valve body has a disk portion facing to the valve seat and a hollow-cylindrical portion extending from the disk portion in the contact-separate direction of the valve body. 
     
     
         8 . The suction throttle mechanism of a compressor according to  claim 1 , wherein the guide portion includes a peripheral wall portion which makes sliding contact with an outer peripheral surface of the valve body to thereby guide the valve body. 
     
     
         9 . The suction throttle mechanism of a compressor according to  claim 1 , wherein
 the suction passage is formed in a substantial L shape having a bent portion,   the valve seat and the valve housing are fit in the bent portion of the suction passage so that the valve seat and the valve housing face to each other, and   the valve seat protrudes from a wall surface forming the suction passage.