Patent ID: 8043079

Claim:
A compressor comprising: a casing having an inner space; a suction pipe connected to the casing; a discharge pipe connected to the casing; a motor located in the inner space of the casing to generate a driving force, the motor having a crankshaft; a compressing unit located in the inner space of the casing, the compressing unit being driven by the motor to compress a refrigerant; an oil separator configured to separate oil from a refrigerant discharged from the compressing unit; an oil recollecting pipe connected to the oil separator; and at least one oil pump configured to pump oil separated from the oil separator for recollection, wherein the at least one oil pump is directly connected to the oil recollecting pipe, and wherein the at least one oil pump is coupled to the crankshaft of the motor to be driven by a rotational force of the crankshaft, and wherein the at least one oil pump includes: a pump housing having a first inlet and a second inlet formed thereat, the pump housing having a pumping space; an inner gear rotatably located in the pumping space of the pump housing and coupled to the crankshaft to rotate therewith; and an outer gear rotatably located in the pumping space of the pump housing, the outer gear being engaged with the inner gear to form a variable capacity, wherein the pump housing includes: a first suction guiding groove in communication with the first inlet, which is directly connected with the oil recollecting pipe; a second suction guiding groove in communication with the second inlet, which is directly connected with the inner space of the casing, the first and second suction guiding grooves being separated from each other; and at least one discharge guiding groove located at a side of the pump housing opposite to the first and second suction guiding grooves, the at least one discharge guiding groove being in communication with the oil passage of the crankshaft.