Title:
冷凍サイクル装置
Document Type and Number:
Japanese Patent JP6993283
Kind Code:
B2
Abstract:
To use a refrigerant with high condensation pressure, such as carbon dioxide, as working fluid in a refrigeration cycle device having an electronic expansion valve and adopting a duty method for valve opening control.SOLUTION: A refrigeration cycle device includes: a compressor 13; an expansion section 16 including an electronic expansion valve 26; high-pressure side piping 17A; low-pressure side piping 17B; and a control section 23 for performing opening control of the electronic expansion valve 26 by performing duty control of a valve opening time ratio in a predetermined cycle time C while the compressor 13 is being operated. The refrigeration cycle device further includes pressure-equalizing piping 27 bypassing the electronic expansion valve 26 and causing the refrigerant to flow in from the high-pressure side piping 17A to the low-pressure side piping 17B at least when the compressor 13 is operated and the electronic expansion valve 26 is in the closed state.SELECTED DRAWING: Figure 1
Inventors:
Chihiro Harada
Yusuke Hiraishi
Yusuke Hiraishi
Application Number:
JP2018077869A
Publication Date:
January 13, 2022
Filing Date:
April 13, 2018
Export Citation:
Assignee:
Fukushima Galilei Co., Ltd.
International Classes:
F25B1/00; F25B41/345; F25B41/37
Domestic Patent References:
| JP2017211099A | ||||
| JP63123959A | ||||
| JP2002286300A | ||||
| JP62116876A |
Attorney, Agent or Firm:
Satoshi Morimoto