Title:
FREEZING DEVICE
Document Type and Number:
Japanese Patent JP3952951
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To drive a freezing device in any operating condition, and to improve COP of the freezing device.
SOLUTION: Carbon dioxide is filled as a refrigerant in a refrigerant circuit 10 of the freezing device. A first compressor 21 and a second compressor 22 are arranged in parallel in the refrigerant circuit 10. The first compressor 21 is connected with both an expander 23 and a first electric motor 31, and driven by both of them. The second compressor 22 is connected with only a second electric motor 32, and driven by it. A bypass piping 40 bypassing an expander 22 is arranged in the refrigerant circuit 10. A bypass valve 41 is arranged in the bypass piping 40.
Inventors:
Katsumi Hokoya
Moriwaki Michio
Masakazu Okamoto
Eiji Kumakura
Tetsuya Okamoto
Moriwaki Michio
Masakazu Okamoto
Eiji Kumakura
Tetsuya Okamoto
Application Number:
JP2003001972A
Publication Date:
August 01, 2007
Filing Date:
January 08, 2003
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F25B11/02; G01C21/00; B64D45/00; B64D47/06; F25B1/00; F25B9/00; F25B9/06; F25B13/00; G01S13/91; G08G5/00; (IPC1-7): F25B11/02; F25B1/00
Domestic Patent References:
JP2000329416A | ||||
JP2001116371A | ||||
JP3172587A | ||||
JP3137457A | ||||
JP2003279179A |
Foreign References:
WO2001042035A1 |
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Takashi Goto
Iseki Katsumori
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Takashi Goto
Iseki Katsumori
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