Hermetic compressor and refrigeration cycle device having the same

[0061]Hereinafter, an oil pump according to another embodiment of the present invention will be described. In the aforementioned embodiment, one oil pump 1000 was used to both recollect oil separated from a refrigerant by the oil separator 100 and to pump oil stored within the inner space of the casing into the oil passage 23a of the crankshaft 23. However, in the second embodiment, a plurality of oil pumps 1200, 1300 are provided.

[0062]In the embodiment of FIG. 9, a first oil pump 1200 is configured to recollect oil from the oil separator 100, whereas a second oil pump 1300 is configured to pump oil stored within the inner space of the casing 10 into the oil passage 23a of the crankshaft 23. For this, the first oil pump 1200 and the second oil pump 1300 may be implemented as trochoid gear pumps having first and second variable capacities, similar to the oil pump 1000 of the As illustrated in the embodiment of FIG. 9, the first oil pump 1200 and the second oil pump 1300 may be arranged at upper and lower sides of each other in an axial direction, e.g., along the axis of rotation of the two pumps.

[0063]As illustrated in FIG. 9, at a bottom surface of an upper housing 1111, formed is a first pumping space 1151 for inserting a first inner gear 1210 and a first outer gear 1220. At an upper surface of the upper housing 1111, formed is a shaft groove 1152 for inserting the crankshaft 23. Between the shaft groove 1152