Closed type motor-driven compressor, a scroll compressor and a scroll lap machining end mill

A closed type motor-driven compressor comprising:

• a closed container;
• a motor accommodated in said closed container;
• a compression means in said container;
• a crankshaft for connecting said motor to said compression means, said compression means including a frame disposed in said closed container adjacent said motor and dividing the interior of said closed container into first and second spaces, said compression means having a discharge port through which a mixture of compressed gas and atomized lubricant oil is discharged into said first space, said motor being disposed in said second space, said frame including a bearing portion through which said crankshaft rotatably extends, said frame having formed thereon a passage communicating said first space with said second space adjacent a peripheral wall of said container so that the mixture of the compressed gas and the atomized lubricant oil flows from said first space through said passage into a first zone of said second space radially outwardly remote from said bearing portion of said frame;
• and
• a discharge pipe having an inlet positioned in said second space in said closed container and extending outwardly from said closed container to allow the compressed gas to be discharged from said second space, an amount of lubricating oil being contained in a bottom portion of said closed container,
• wherein a substantially annular shielding member is disposed in said second space between said compression means and said motor and has an axial end connected to said frame of said compression means and extends therefrom into said second space substantially towards said bottom portion of said container to substantially shield a second zone of said second space radially inwardly of said first zone of said second space, said inlet of said discharge pipe is positioned in said second zone of said second space, said passage has an end open to said first zone of said second space whereby a flow of the atomized lubricant oil contained in the mixture flowing from said first space through said passage into said first zone of said second space is minimized from said open end of said passage into said second zone of said second space and thus to said inlet of said discharge pipe.