Title:
REFRIGERANT CIRCUIT DEVICE
Document Type and Number:
Japanese Patent JP2018044725
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigerant circuit device enabling stable control of a water level of a gas liquid separator used for the refrigerant circuit device including a two-stage compression two-stage expansion cycle by using a simple configuration.SOLUTION: A refrigerant circuit device includes: an evaporator 12 for evaporating a low-pressure refrigerant; a low-stage compressor 1 for compressing the low-pressure refrigerant to intermediate pressure; a high-stage compressor 2 for compressing an intermediate-pressure refrigerant to high pressure; a condenser 3 for condensing a high-pressure refrigerant; a high-stage expansion valve 5 for decompressing and expanding the high-pressure refrigerant condensed by the condenser 3 to an intermediate pressure; a gas liquid separator 7 for performing gas-liquid separation of the intermediate-pressure refrigerant introduced from the high-stage expansion valve 5; intermediate piping 9 for introducing the intermediate-pressure refrigerant introduced from a gas phase side outlet of the gas liquid separator 7 to between a discharge port of the low-stage compressor 1 and a suction port of the high-stage compressor 2; and a low-stage side expansion valve 10 for decompressing and expanding the intermediate-pressure refrigerant introduced from a liquid phase side outlet of the gas liquid separator 7 to low-pressure and leading out the low-pressure refrigerant to the evaporator 12. The refrigerant circuit device further includes a control section C for controlling rotational frequency of the low-stage compressor 1 in accordance with dryness of the refrigerant introduce to the gas liquid separator 7.SELECTED DRAWING: Figure 1
Inventors:
ONISHI YUSUKE
NAKAMURA ATSUSHI
SHIBATA SHUHEI
NAKAMURA ATSUSHI
SHIBATA SHUHEI
Application Number:
JP2016180366A
Publication Date:
March 22, 2018
Filing Date:
September 15, 2016
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
F25B1/00; F25B1/10
Domestic Patent References:
| JP2013002722A | 2013-01-07 | |||
| JP2007147218A | 2007-06-14 | |||
| JP2016044938A | 2016-04-04 | |||
| JPS56105258A | 1981-08-21 | |||
| JP2012112648A | 2012-06-14 | |||
| JP2007085612A | 2007-04-05 | |||
| JP2002277078A | 2002-09-25 | |||
| JP2014016119A | 2014-01-30 | |||
| JPH0237259A | 1990-02-07 |
Attorney, Agent or Firm:
Sakai International Patent Office