Patent ID: 7144229

Claim:
A hermetic electric compressor comprising: an electric motor comprising a stator and a rotor; a compressing element for compressing refrigerant by a rotation of a crankshaft fixed to the rotor of said electric motor; a hermetic shell housing said electric motor and said compressing element and including a reservoir arranged to store lubricating oil, said crankshaft comprising at least a main crankshaft, and a eccentric crankshaft for driving said compressing element; an oil pump for supplying said lubricating oil in said reservoir to an inside of said hermetically-sealed shell by rotation of the crankshaft via said main crankshaft and said eccentric crankshaft by a rotation of said crankshaft, said oil pump being provided inside of said main crankshaft, and said oil pump comprising: a slanting channel having a predetermined length and provided from a bottom end of said main crankshaft, said slanting channel slanting with respect to a center axis of said main crankshaft, the bottom end of said main crankshaft arranged to be immersed in said stored lubricating oil; a throttle provided at said bottom end of said main crankshaft and having a cross-sectional area smaller than a cross-sectional area that of said slanting channel; a communicating passage provided at a top end of said slanting channel; a spiral groove in communication with said communicating passage, provided in an outer periphery of said main crankshaft; and a through-hole in communication with said spiral groove, provided in said eccentric crankshaft.