Compressor and air conditioner

Abstract

According to one embodiment, a compressor includes cylinders, a rotating shaft, bearings, discharge valve mechanisms, and mufflers. As to the mufflers, an outer contour of the muffler chamber is defined by each of an end face part which is a face part on one end side of the muffler in an axial direction of the rotating shaft, a brim part which is a face part on the other end side in the axial direction, and a side face part which joins the end face part and the brim part to each other in a cylindrical form in the circumferential direction of the rotating shaft, and one of the mufflers includes a concave part formed by denting each of the end face part and the side face part toward the inside of a muffler chamber.

What is claimed is: 
     
         1 . A compressor comprising:
 cylinders which compress a refrigerant;   a rotating shaft arranged inside the cylinders and including eccentric parts;   bearings each of which includes a flange part defining a surface in the cylinder in an axial direction of the rotating shaft, and a boss part extending in a cylindrical form concentric with the rotating shaft so as to be continuous with the flange part and rotatably supporting the rotating shaft;   at least one of discharge valve mechanisms which is arranged in the flange part and includes a discharge valve deformed to be opened when the refrigerant compressed by the cylinder reaches a predetermined discharge pressure and lengthwise in a predetermined direction, and a valve presser suppressing further deformation of the discharge valve when the discharge valve is opened; and   at least one of mufflers which covers the bearing so as to surround a part between the flange part and the boss part and forms, between the flange part and the boss part, a muffler chamber into which the refrigerant compressed by the cylinder is discharged, wherein   as to the mufflers, an outer contour of the muffler chamber is defined by each of an end face part which is a face part on one end side of the muffler in the axial direction of the rotating shaft, a brim part which is a face part on the other end side in the axial direction of the rotating shaft, and a side face part which joins the end face part and the brim part to each other in a cylindrical form throughout the entire circumference in the circumferential direction of the rotating shaft, and at least one of the mufflers includes a concave part formed by denting each of the end face part and the side face part toward the inside of the muffler chamber.   
     
     
         2 . The compressor of  claim 1 , wherein
 the flange part includes a dug-down part which is formed by making an end face of the flange part on one end side in the axial direction of the rotating shaft concave, and in which the discharge valve and the valve presser are installed, and   when projected onto the flange part from the axial direction of the rotating shaft, the concave part is arranged in such a manner as to intersect the longitudinal direction of the discharge valve and overlap the dug-down part.   
     
     
         3 . The compressor of  claim 2 , wherein
 the concave part is configured to include a first face part, a second face part, a third face part, and a fourth face part,   the first face part and the second face part are parallel to a predetermined virtual plane including the central axis of the rotating shaft and intersecting the longitudinal direction of the discharge valve, and   the third face part and the fourth face part are continuous with each other, the third face part joins the first face part and the second face part to each other at a part on one side in the axial direction of the rotating shaft, and the fourth face part joins the first face part and the second face part to each other at a part on the other side in the axial direction of the rotating shaft.   
     
     
         4 . The compressor of  claim 3 , wherein
 the third face part includes a through-hole into which a first fixing member used to fix the muffler to the boss part is to be inserted, and   the first face part and the second face part are opposed to each other with a separation distance for prevention of interference with the first fixing member held between the first face part and the second face part.   
     
     
         5 . The compressor of  claim 1 , wherein
 the brim part includes a plurality of through-holes into which second fixing members used to fix the brim part to the cylinder through the flange part are to be inserted.   
     
     
         6 . An air conditioner comprising:
 a compressor of  claim 1 ;   a condenser connected to the compressor;   an expanding device connected to the condenser; and   an evaporator connected to the expanding device.