Patent ID: 7416395

Claim:
A compressor comprising sleeves respectively attached to an inlet and an outlet for a refrigerant provided in and opened to a sealed container, by projection welding, in which a refrigerant is introduced from an outside of the container via a refrigerant introduction pipe connected to the container via the sleeve for the refrigerant inlet, and then the refrigerant introduced is compressed by compression means incorporated in the sealed container to be discharged to the outside of the container via a refrigerant discharge pipe connected to the container via the sleeve for the refrigerant outlet, wherein the sleeve includes a through hole penetrating a small-outer-diameter portion and a large-outer-diameter portion which are provided consecutively via a step portion, and wherein a diameter of an outer peripheral part of the sleeve on the open end side of the small-outer-diameter portion has a tapered part being gradually decreased towards the open end side and a diameter of an inner peripheral part of the sleeve on the open end side of the small-outer-diameter portion is gradually increased towards the open end side, and said sleeves are attached to the sealed container by the projection welding with the tapered part facing the outside of the sealed container and fitting into the respective inlet and outlet of the sealed container from the outside.