Compressor and refrigeration cycle device

Abstract

According to one embodiment, a compressor includes a cylinder, a rotation shaft, a roller, a blade, and an injection flow channel. The cylinder includes a spring insertion hole in which the spring, which presses the blade against the roller is arranged. The injection flow channel includes a blade groove formed in a surface portion facing the compression chamber, of side surface portions constituting a pair on the blade and facing a circumferential direction with respect to the center of axis of the rotation shaft. A surface on which a part of the refrigerant flows into the blade groove is flush with a surface discharging the part of the refrigerant from the blade groove to the compression chamber.

What is claimed is: 
     
         1 . A compressor, comprising:
 an annular cylinder, which constitutes a cylinder chamber including a suction chamber for sucking a refrigerant and a compression chamber for compressing the refrigerant;   a rotation shaft, which includes an eccentric portion arranged in the cylinder chamber;   a roller, which is fitted into the eccentric portion and eccentrically rotates with respect to a center of axis of the rotation shaft in the cylinder chamber;   a flat blade, which advances or retracts in the cylinder chamber according to an eccentric rotation of the roller and partitions the cylinder chamber into the suction chamber and the compression chamber; and   an injection flow channel branching from a cyclic circuit, through which the refrigerant circulates, and guiding a part of the refrigerant circulating through the cyclic circuit to the compression chamber, wherein   the injection flow channel includes at least a blade groove formed in a surface portion facing the compression chamber, of side surface portions constituting a pair on the blade and facing a circumferential direction with respect to the center of axis of the rotation shaft, and   a surface on which the part of the refrigerant flows into the blade groove is flush with a surface discharging the part of the refrigerant from the blade groove to the compression chamber.   
     
     
         2 . A compressor, comprising:
 an annular cylinder, which constitutes a cylinder chamber including a suction chamber for sucking a refrigerant and a compression chamber for compressing the refrigerant;   a rotation shaft, which includes an eccentric portion arranged in the cylinder chamber;   a roller, which is fitted into the eccentric portion and eccentrically rotates with respect to a center of axis of the rotation shaft in the cylinder chamber; and   a substantially flat blade, which advances or retracts in the cylinder chamber according to an eccentric rotation of the roller and partitions the cylinder chamber into the suction chamber and the compression chamber, wherein   the cylinder and the blade include an injection flow channel branching from a cyclic circuit, through which the refrigerant circulates, and guiding a part of the refrigerant circulating through the cyclic circuit to the compression,   the cylinder includes:   a blade hole, which is open to an inner peripheral part, extends outwardly along a diameter direction, and accommodates the blade;   a spring, which presses the blade against the roller in the blade hole; and   a spring insertion hole in which the spring is arranged,   the injection flow channel includes:   a blade groove formed in a groove shape in a surface portion facing the compression chamber, of side surface portions constituting a pair on the blade and facing a circumferential direction with respect to the center of axis of the rotation shaft; and   a cylinder flow channel open to be communicable with the blade groove on a wall portion opposed to the surface portion facing the compression chamber of the blade in the blade hole, and   the blade groove is arranged on the surface portion facing the compression chamber of the blade so as not to overlap with the spring insertion hole in the circumferential direction.   
     
     
         3 . The compressor of  claim 2 , wherein
 an end portion in a retraction side of the blade in the blade groove does not reach an end surface portion in the retraction side of the blade, and   in a state where the blade is most retracted with respect to the cylinder chamber in the blade hole, the end portion is located closer to the center of axis of the rotation shaft than the spring insertion hole is.   
     
     
         4 . The compressor of  claim 2 , wherein
 the rotation shaft includes the plurality of eccentric portions equidistantly arranged in the circumferential direction at intervals in a direction of the center of axis, and   the cylinder includes the plurality of cylinder chambers each accommodating one of the plurality of eccentric portions, and   while the rotation shaft rotates once, the compression chamber, the blade groove, and the cylinder flow channel are in communication with each other at an angle range smaller than an equidistant angle of the plurality of eccentric portions.   
     
     
         5 . The compressor of  claim 2 , wherein
 the blade groove has a longitudinal side along an advancing/retracting direction in the blade hole, and   a groove cross-section area of the blade groove intersecting a longitudinal direction is approximately constant over the entire longitudinal direction.   
     
     
         6 . The compressor of  claim 2 , wherein
 the blade groove has a longitudinal side along an advancing/retracting direction in the blade hole and includes a plurality of portions having different groove cross-section areas intersecting a direction of the longitudinal side.   
     
     
         7 . The compressor of any one of  claims 5 and 6 , wherein
 the groove cross-section area of the blade groove is smaller than or equal to an aperture area of the aperture in the cylinder flow channel in the wall portion of the blade.   
     
     
         8 . The compressor of  claim 2 , wherein
 the blade includes the plurality of blade grooves in the surface portion facing the compression chamber,   the cylinder includes the plurality of cylinder flow channels, which are open to different parts of the wall portion opposed to the surface portion facing the compression chamber of the blade in the blade hole, and   the plurality of blade grooves have different entire lengths along the advancing/retracting direction in the blade hole.   
     
     
         9 . A refrigeration cycle device, comprising:
 the compressor of any one of  claims 1 and 2 ;   a condenser connected to the compressor;   an expansion device connected to the condenser; and   an evaporator connected to the expansion device.