To provide a refrigerator carrying out a two-stage compression refrigeration cycle, in which airtightness of a compression chamber is quickly secured in a high stage compression mechanism after starting, and compression of a fluid is initiated.
A second inner back pressure chamber (S21) facing the back surface of an end plate (71a) of a second piston (71) and communicating with a discharge space (S1), and a second outer back pressure chamber (S22) facing the back surface of the end plate (71a) of the second piston (71) and communicating with an inner compression chamber (C2b) are formed in a second compression mechanism (70) in a higher stage side of an air conditioner that carries out a two-stage compression refrigeration cycle. In the air conditioner (10), during a prescribed period in the middle of pressure rising after starting a first compression mechanism (50) and the second compression mechanism (70), a suction pressure reduction operation is carried out, in which the suction side of the second compression mechanism (70) and the suction side of the first compression mechanism (50) are communicated to reduce the pressure of a sucked fluid in the second compression mechanism (70).
| JP3555611 | HERMETICALLY SEALED COMPRESSOR |
| JP7195446 | Multi-stage rotary compressor and refrigeration cycle device |
| JP2000249089 | GAS COMPRESSOR |
SOTOJIMA RYUZO
SHIBAMOTO YOSHITAKA
SATA KENICHI
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Kazunari Ninomiya
Tomoo Harada
Seki Kei
Yasuya Sugiura
Daisuke Kawabe
Masanori Hasegawa
Tsuguya Iwashita
Koji Fukumoto
Ryo Maeda
Mawaki Hachizo
Yukichi Matsunaga
Kenji Kawakita
Shohei Okazawa
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