Samsung electronics co., ltd. (20250075692). RECIPROCATING COMPRESSOR WITH DUAL OIL PUMP
RECIPROCATING COMPRESSOR WITH DUAL OIL PUMP
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RECIPROCATING COMPRESSOR WITH DUAL OIL PUMP
This abstract first appeared for US patent application 20250075692 titled 'RECIPROCATING COMPRESSOR WITH DUAL OIL PUMP
Original Abstract Submitted
a reciprocating compressor is provided. the reciprocating compressor includes a case containing an oil reservoir, a motor including a stator disposed inside the case and a rotor that rotates with respect to the stator, a drive shaft that rotates integrally with the rotor and including a cavity formed at a lower portion thereof, a primary oil pump inserted into the cavity of the drive shaft and disposed in the case, a secondary oil pump into which a lower end portion of the drive shaft is inserted and coupled to the primary oil pump, a primary oil passage formed between an inner circumferential surface of the cavity of the drive shaft and the primary oil pump, and a secondary oil passage formed around the primary oil pump between an outer circumferential surface of the lower end portion of the drive shaft and the secondary oil pump, wherein, when the drive shaft rotates, oil contained in the oil reservoir moves to an upper portion of the cavity of the drive shaft along the primary oil passage and the secondary oil passage.