Title:
冷凍装置
Document Type and Number:
Japanese Patent JP6786965
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a refrigeration apparatus having an excellent COP (Coefficient Of Performance).SOLUTION: A refrigeration apparatus 100 comprises: a plurality of compressors 11 arranged in parallel with one another; a plurality of injection pipes (fourth piping P4) for making an intermediate-pressure refrigerant flow in a corresponding compressor 11; a plurality of injection valves 17 for regulating the flow rate of the intermediate-pressure refrigerant in the corresponding injection pipe; upstream-side common piping (twelfth piping P12) where an intermediate-pressure refrigerant flowing into each injection valve 17 flows; a refrigerant flow rate regulating valve (second expansion valve 16) for regulating the flow rate of the intermediate-pressure refrigerant flowing in the upstream-side common piping (P12); and a controller 50. The controller 50 executes, when changing an opening of one injection valve 17, intermediate-pressure suppression control, and changes the opening of the second expansion value 16 to an intermediate-pressure suppression opening (opening of the injection valve 17 at which pressure of the intermediate-pressure refrigerant flowing into each compressor 11 is restrained from excessively rising).SELECTED DRAWING: Figure 3
Inventors:
Azuma Kondo
Takahito Nakayama
Takahito Nakayama
Application Number:
JP2016170961A
Publication Date:
November 18, 2020
Filing Date:
September 01, 2016
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F25B1/00
Domestic Patent References:
| JP2010054186A | ||||
| JP4462387B1 | ||||
| JP2010121849A | ||||
| JP2009180451A | ||||
| JP2012193897A |
Foreign References:
| KR1020160097000A |
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation