Compressor

Abstract

A discharge port of a compression element is positioned inside an outer circumferential surface of a stator, as seen looking in a direction of a rotation axis of a shaft, and overlaps the stator, as seen looking in a direction orthogonal to the rotation axis of the shaft. Accordingly, refrigerant gas discharged from the compression element can be made to flow mainly into spaces inside the outer circumferential surface of the stator.

1 . A compressor comprising:
 a sealed casing;   a compression element disposed in the sealed casing; and   a motor that is placed in the sealed casing to drive the compression element through a shaft, the motor including a rotor and a stator disposed radially outwardly of the rotor,   the sealed casing, the rotor and the casing being arranged and configured to form spaces on a radially inner side of the stator and to form spaces on a radially outer side of the stator,   the spaces on the radially inner side of the stator being a delivery passage through which refrigerant gas discharged from the compression element in the sealed casing and lubricating oil in the sealed casing flow in a direction away from to the compression element with respect to the motor and   the spaces on the radially outer side of the stator being a return passage through which the lubricating oil in the sealed casing is returned in a direction toward the compression element with respect to the motor.   
   
   
       2 . A compressor as claimed in  claim 1 , wherein
 the compression element includes a discharge port arranged to discharge the refrigerant gas from the compression element into the sealed casing externally of the compression element,   the discharge port of the compression element is positioned inside an outer circumferential surface of the stator as viewed in a direction parallel to a rotation axis of the shaft, and   the discharge port of the compression element is positioned to overlap the stator as viewed in a direction orthogonal to the rotation axis of the shaft.   
   
   
       3 . A compressor as claimed in  claim 2 , wherein the stator includes
 a stator body including a plurality of teeth that protrude radially inward and that are arranged along a circumferential direction, and   a plurality of coils with each of the coils being wound on a corresponding one of the teeth without being wound on a plurality of teeth.   
   
   
       4 . A compressor as claimed in  claim 1 , wherein
 the compression element includes a support part arranged to support the shaft, the support part having an oil discharge port arranged to discharge the lubricating oil from the compression element into the sealed casing externally of the compression element, with the oil discharge port being disposed between the support part and the shaft,   the stator includes a stator core, a plurality of coils wound on the stator core, and guide parts disposed radially outwardly of the coils, and   the guide parts are arranged to guide the lubricating oil discharged from the oil discharge port and the refrigerant gas discharged from the compression element into the sealed casing toward the radially inner side of the stator.   
   
   
       5 . A compressor as claimed in  claim 4 , wherein
 the guide parts are positioned radially outwardly of the oil discharge port of the support part as viewed in a direction parallel to of a rotation axis of the shaft, and   the guide parts extend farther from the stator core than the oil discharge port of the support part as viewed in a direction orthogonal to the rotation axis of the shaft.   
   
   
       6 . Currently Amended) A compressor as claimed in  claim 4 , wherein
 the guide parts are part of insulators interposed and held between the coils and the stator core.