To inhibit an increase of oil discharge by surely recovering oil contained in a discharged refrigerant of a compressor.
One end of a first oil return pipe (31d) is connected to a first oil separator (31c) and the other end is connected to a third branch pipe (33a). One end of a second oil return pipe (32d) is connected to a second oil separator (32c) and the other end is connected to a fourth branch pipe (34a). One end of a third oil return pipe (33d) is connected to a third oil separator (33c) and the other end is connected to a first branch pipe (31a). One end of a fourth oil return pipe (34d) is connected to a fourth oil separator (34c) and the other end is connected to a second branch pipe (32a). The respective branch pipes (31a, 32a, 33a, 34a) are inclined at predetermined angles so that the oil recovered from the respective oil return pipes (31d, 32d, 33d, 34d) flows toward the branch position of a suction pipe (35) from connection positions of the oil return pipes (31d, 32d, 33d, 34d).
ICHI CHOTA
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
Seki Kei
Yasuya Sugiura
Daisuke Kawabe
Masanori Hasegawa
Tsuguya Iwashita
Koji Fukumoto
Ryo Maeda
Mawaki Hachizo
Yukichi Matsunaga
Kenji Kawakita
Shohei Okazawa