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Closed type compressor
| Details |
Inventors: Tahata, Masahiro; Washizu, Hirokazu;
Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP)
Primary Examiner: Croyle; Carlton R.
Assistant Examiner: Olds; Theodore W.
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
A closed type compressor having a closed casing, a compressor unit, and a motor enclosed in the casing together with the compressor unit. A copper pipe is mounted to the casing through a steel pipe joint for inducing or discharging a coolant to or from the compressor. The casing is comprised of a steel cylindrical wall which has an elliptical aperture in its wall, a top end wall, and a bottom end wall respectively closing the top and the bottom end openings of the cylindrical side wall. The pipe joint has a conical outer surface capable of meeting with the ellliptical aperture wall defining the elliptical aperture in the cylindrical side wall without leaving any gap between them. The pipe joint is coupled to the elliptical aperture wall of the cylindrical side wall by resistance welding. |
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DETAILED DESCRIPTION According to one aspect of the present invention, the closed type compressor has a hermetic casing, a compressor unit housed in the casing, an electric motor housed in the casing together with the compressor unit for driving the compressor unit, and a copper pipe mounted to the casing through a pipe joint for inducing or discharging a coolant or a refrigerant to or from the compressor.
The casing is comprised of a steel cylindrical side wall which defines an elliptical aperture for receiving the pipe joint and a top end and a bottom end walls respectively closing a top and a bottom end openings of the cylindrical side wall.
The pipe joint has a conical outer surface with a predetermined conical angle so as to be able to contact with the elliptical aperture wall of the cylindrical side wall without leaving any gaps between them so that the pipe joint is welded to the elliptical aperture wall of the cylindrical side wall in securing hermeticity of the casing.
Additional objects, advantages, and features of the present invention will further become apparent to persons skilled in the art from a study of the following description and of the accompanying drawings, in which:
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