Hermetic compressor and refrigeration cycle apparatus

Abstract

A hermetic compressor includes a compression mechanism in a hermetic container. The compression mechanism is driven by an electric motor through a rotation shaft, and includes a cylinder including a cylinder chamber having a cylindrical shape. The cylinder has a cylinder suction hole extending in a radial direction of the cylinder and allowing fluid to be sucked into the cylinder chamber. In an outer circumferential surface of the cylinder, a cylindrical groove is formed in such a manner as to surround the cylinder suction hole. Between the cylinder suction hole and the cylindrical groove, a cylinder tubular portion is provided. To an outer circumferential surface of the cylinder tubular portion, a suction pipe or a connecting pipe provided at one end of the suction pipe is connected, the suction pipe being a pipe through which the fluid is guided from outside of the hermetic container to the cylinder chamber.

1 . A hermetic compressor comprising a compression mechanism in a hermetic container, the compression mechanism being driven by an electric motor through a rotation shaft,
 wherein   the compression mechanism includes a cylinder including a cylinder chamber having a cylindrical shape, the cylinder having a cylinder suction hole that extends in a radial direction of the cylinder and that allows fluid to be sucked into the cylinder chamber,   in an outer circumferential surface of the cylinder, a cylindrical groove is formed in such a manner as to surround the cylinder suction hole,   between the cylinder suction hole and the cylindrical groove, a cylinder tubular portion is provided, and   to an outer circumferential surface of the cylinder tubular portion, a connecting pipe provided at one end of a suction pipe is connected, the suction pipe being a pipe through which the fluid is guided from outside of the hermetic container to the cylinder chamber.   
     
     
         2 . The hermetic compressor of  claim 1 , wherein the cylindrical groove extends through the cylinder in a thickness direction of the cylinder. 
     
     
         3 . The hermetic compressor of  claim 1 , further comprising a bearing that is in contact with the cylinder and supports the rotation shaft such that the rotation shaft is rotatable,
 wherein at an outer circumferential end portion of the bearing, a bearing recessed portion is provided to prevent interference between the bearing and the connecting pipe.   
     
     
         4 . The hermetic compressor of  claim 1 , wherein the cylinder tubular portion has a circular shape as viewed from the front. 
     
     
         5 . The hermetic compressor of  claim 1 , wherein the cylinder tubular portion is formed in the shape of an ellipse or a rectangle having rounded corners as viewed from the front. 
     
     
         6 . A refrigeration cycle apparatus comprising: the hermetic compressor of  claim 1 ; an outdoor-side heat exchanger; a pressure reducing device; and an indoor-side heat exchanger. 
     
     
         7 . A hermetic compressor comprising a compression mechanism in a hermetic container, the compression mechanism being driven by an electric motor through a rotation shaft,
 wherein   the compression mechanism includes a cylinder including a cylinder chamber having a cylindrical shape, the cylinder having a cylinder suction hole that extends in a radial direction of the cylinder and that allows fluid to be sucked into the cylinder chamber,   in an outer circumferential surface of the cylinder, a cylindrical groove is formed in such a manner as to surround the cylinder suction hole,   between the cylinder suction hole and the cylindrical groove, a cylinder tubular portion is provided, and   to an outer circumferential surface of the cylinder tubular portion, a suction pipe is connected, the suction pipe being a pipe through which the fluid is guided from outside of the hermetic container to the cylinder chamber.   
     
     
         8 . The hermetic compressor of  claim 7 , further comprising a bearing that is in contact with the cylinder and supports the rotation shaft such that the rotation shaft is rotatable,
 wherein at an outer circumferential end portion of the bearing, a bearing recessed portion is provided to prevent interference between the bearing and the suction pipe.