Title:
An operating method of an expansion machine integral-type compressor, a freezer, and a freezer
Document Type and Number:
Japanese Patent JP6276000
Kind Code:
B2
Abstract:
To reduce heat transfer from leakage fluid from a compressor side to an expander in a casing of an expander-integrated compressor to improve the coefficient of performance (COP) of a refrigerator, the expander-integrated compressor includes a motor, a compressor connected to an output shaft of the motor, an expander connected to the output shaft of the motor, a non-contact bearing disposed between the compressor and the expander, a casing, and an extraction line provided so as to be in communicated with a region between the compressor and the expander in the internal space of the casing and configured to extract, from the region, the leakage fluid from the compressor side toward the expander side in the casing and to send the leakage fluid to a fluid line connected to the intake side or the discharge side of the compressor outside the casing. The casing is configured to seal the region from outside of the casing so that the flow of the at least a part of the leakage fluid through the extraction line is the only flow of fluid between the region and the outside of the casing.
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Inventors:
Ueda Shota
Machida Akito
Kudo Mizuo
Machida Akito
Kudo Mizuo
Application Number:
JP2013233149A
Publication Date:
February 07, 2018
Filing Date:
November 11, 2013
Export Citation:
Assignee:
Maekawa Manufacturing Co., Ltd.
International Classes:
F04D29/58; F01D15/08; F04B35/00; F04D25/16; F04D29/54; F25B11/02
Domestic Patent References:
| JP2005098604A |
Foreign References:
| WO2006011248A1 |
Attorney, Agent or Firm:
Seishin ip patent business corporation