To provide an oil separator which improves an oil separation performance, improves mass-productivity, is low-priced and improves pressure resistance.
A cylindrical oil separator comprises, in an upper part of an oil storage chamber, a separation chamber which is formed with a diameter equal to or smaller than that of the oil storage chamber. In the oil separator, an oil feed pipe is connected to a lower-end diameter-reduced part of the oil storage chamber, a discharge pipe is connected to an upper-end diameter-reduced part of the separation chamber, further, an inflow pipe for a two-phase flow of oil and a gas refrigerant is introduced from a tangential direction of a separation chamber rising wall, and oil in the refrigerant is separated within the separation chamber using a centrifugal force. When an average height of a space formed from an upper end portion of the inflow pipe, an inner surface of a rising wall higher than the upper end portion of the inflow pipe and an inner surface of a ceiling wall is defined as Hm and an inner diameter of the separation chamber is defined as Di, Hm/Di≤0.25 is satisfied. The separation chamber is configured by contraction, forging or pressing and further the rising wall and the ceiling wall of the separation chamber are configured integrally or separately.
SAKAMOTO RYOHEI
YAMAMOTO TAKESHI
YAMASHITA YOKO
IWATA HIROSHI
SHIKAZONO NAOKI
UNIV TOKYO
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