Compressor

Abstract

A compressor includes a housing; a suction region and a discharge region which are formed in the housing in a partitioned manner. The compressor also includes a shaft which is pivotally supported in the inside of the housing. The compressor further includes a compression mechanism which sucks a refrigerant from the suction region and discharges the refrigerant to the discharge region due to a rotational motion of the shaft. The compressor further includes a bypass passage which makes the suction region and the discharge region communicate with each other, a valve element 41 which is capable of closing the bypass passage 40 from a discharge region side, and a spring which biases the valve element toward the discharge region side.

1 . A compressor comprising:
 a housing;   a suction region and a discharge region which are formed in the housing in a partitioned manner;   a shaft which is pivotally supported in an inside of the housing; and a compression mechanism which sucks a refrigerant from the suction region and discharges the refrigerant to the discharge region due to a rotational motion of the shaft;   a bypass passage which makes the suction region and the discharge region communicate with each other;   a valve element which is capable of closing the bypass passage from a discharge region side; and   a spring which biases the valve element toward the discharge region side.   
     
     
         2 . The compressor according to  claim 1 , wherein a valve port formed with a diameter smaller than an outer diameter of the valve element, and a valve accommodating hole formed on a discharge region side with respect to the valve port with a diameter larger than the outer diameter of the valve element are formed in the bypass passage, and the valve element is accommodated in the valve accommodating hole in an axially movable manner. 
     
     
         3 . The compressor according to  claim 2 , wherein an area of a passage formed between an outer peripheral surface of the valve element and an inner peripheral surface of the valve accommodating hole is set smaller than an area of the valve port. 
     
     
         4 . The compressor according to  claim 1 , wherein the housing is constituted of shell members formed by dividing the housing in two in the axial direction of the shaft, the discharge region and the suction region are defined in the respective shell members, a discharge port which is communicated with the discharge region and a suction port which is communicated with the suction region are formed in either one of the shell members, and the bypass passage is formed in the one shell member in which the discharge port and the suction port are formed. 
     
     
         5 . The compressor according to  claim 4 , wherein the valve element is formed of a steel ball, and a valve seat face on which the valve element is seated is formed on a portion shifting to the valve accommodating hole from the valve port. 
     
     
         6 . The compressor according to  claim 2 , wherein the housing is constituted of shell members formed by dividing the housing in two in the axial direction of the shaft, the discharge region and the suction region are defined in the respective shell members, a discharge port which is communicated with the discharge region and a suction port which is communicated with the suction region are formed in either one of the shell members, and the bypass passage is formed in the one shell member in which the discharge port and the suction port are formed. 
     
     
         7 . The compressor according to  claim 3 , wherein the housing is constituted of shell members formed by dividing the housing in two in the axial direction of the shaft, the discharge region and the suction region are defined in the respective shell members, a discharge port which is communicated with the discharge region and a suction port which is communicated with the suction region are formed in either one of the shell members, and the bypass passage is formed in the one shell member in which the discharge port and the suction port are formed. 
     
     
         8 . The compressor according to  claim 1 , wherein the valve element is formed of a steel ball, and a valve seat face on which the valve element is seated is formed on a portion shifting to the valve accommodating hole from the valve port. 
     
     
         9 . The compressor according to  claim 2 , wherein the valve element is formed of a steel ball, and a valve seat face on which the valve element is seated is formed on a portion shifting to the valve accommodating hole from the valve port. 
     
     
         10 . The compressor according to  claim 3 , wherein the valve element is formed of a steel ball, and a valve seat face on which the valve element is seated is formed on a portion shifting to the valve accommodating hole from the valve port.