Title:
２段圧縮冷凍システム
Document Type and Number:
Japanese Patent JP6594707
Kind Code:
B2
Abstract:
A two-stage compression refrigeration system 1 includes a two-stage compressor 2 that is provided with a low-stage compressor 21 and a high-stage compressor 22 in a closed housing 20 and whose interior is under an intermediate pressure, an oil separating device 3 that is provided on a discharge pipe 9A, an oil return pipe 13 that returns the oil separated by the oil separating device 3, into the closed housing 20 under the intermediate pressure, and a gas injection pipe 14 that injects an intermediate-pressure refrigerant gas from a gas-liquid separating device 6 provided on a refrigerant circuit 10, into the closed housing 20, and the oil return pipe 13 and the gas injection pipe 14 individually communicate with the closed housing 20, between the low-stage compressor 21 and high-stage compressor 22 of the two-stage compressor 2.
Inventors:
Takeda Takeshi
Kawanishi Akio
Kenichi Murakami
Hitoshi Sato
Kawanishi Akio
Kenichi Murakami
Hitoshi Sato
Application Number:
JP2015167987A
Publication Date:
October 23, 2019
Filing Date:
August 27, 2015
Export Citation:
Assignee:
Mitsubishi Heavy Industries Thermal Systems Co., Ltd.
International Classes:
F25B1/10; F04C23/00; F04C29/02; F25B1/00; F25B1/04; F25B43/02
Domestic Patent References:
| JP2008144643A | ||||
| JP2001272122A | ||||
| JP2012202678A |
Attorney, Agent or Firm:
Noriharu Fujita
Miori Takao
Kawakami Miki
Miori Takao
Kawakami Miki