Patent ID: 8062011
Filing Date: 2011-11-22
Classification: F04C

Abstract:
1. A compressor which is provided with a driving element disposed in a sealed container and a compression mechanism portion driven around a rotary shaft of the driving element and which discharges, into the sealed container, a refrigerant compressed by the compression mechanism portion, the compressor comprising: an ejector oil pump which sucks oil from an oil reservoir in the bottom part of the sealed container to an oil passage formed in the rotary shaft, wherein the ejector oil pump includes an oil suction pipe having one end connected to the oil passage and the other end which opens in the oil reservoir, and an ejector pipe having one end which communicates with the discharge side of the compression mechanism portion and the other end inserted into the opening of the other end of the oil suction pipe to open, an inner diameter of the other end of the oil suction pipe is larger than an outer diameter of the other end of the ejector pipe so that a gap for oil suction is constituted between both the pipes, and the other end of the oil suction pipe is provided with a positioning portion which positions the other end of the ejector pipe, wherein the positioning portion defines, in predetermined ranges, the dimension of the ejector pipe to be inserted into the oil suction pipe and the position of the ejector pipe in the oil suction pipe, and wherein the positioning portion is constituted of a first dowel portion formed in a position on which the other end of the ejector pipe abuts, to determine the length of the ejector pipe to be inserted into the oil suction pipe, and a second dowel portion which abuts on the outer peripheral surface of the ejector pipe to determine the position of the ejector pipe in the diametric direction of the oil suction pipe.