Compressor

A compressor comprising:

• a crankshaft;
• a bearing pivotally supporting the crankshaft;
• an electric motor having a rotor coupled to the crankshaft and a stator in which the rotor is housed with an air gap formed therebetween;
• a counterweight being disposed adjacent to the rotor and being integrated with the crankshaft;
• and
• an oil outflow reduction member enclosing an upper side, a lower side, and a lateral side of a counterweight passing space through which at least part of the counterweight passes when the crankshaft rotates 360°, the oil outflow reduction member reducing inflow of oil into the counterweight passing space,
• the oil outflow reduction member being formed in a cylinder shape extending in an axial direction of the crankshaft,
• the oil outflow reduction member including an upper surface portion enclosing the counterweight passing space from above, a side surface portion enclosing the counterweight passing space from the lateral side, and a disc enclosing the counterweight passing space from below, with the disc being spaced above the rotor,
• the oil outflow reduction member rotating together with the counterweight,
• the counterweight and the oil outflow reduction member being disposed between the bearing and the rotor of the electric motor,
• the upper surface portion of the oil outflow reduction member having a hole that receives the crankshaft therethrough, and
• the side surface portion of the oil outflow reduction member extending downward along the axial direction of the crankshaft from an outer rim of the upper surface portion, the upper surface portion being free of another hole through which oil is transmitted.