Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/106795
Kind Code:
A1
Abstract:
According to the present invention, a control device (10) switches an operation mode of a refrigeration cycle device (100) between a heating operation mode and an oil recovery operation mode upon receiving a command for a heating operation. The heating operation mode is a mode for circulating a refrigerant inside a refrigerant circuit (20) so that the refrigerant in a gaseous phase state flows through a gas extension pipe (15). The oil recovery operation mode is a mode for circulating the refrigerant inside the refrigerant circuit (20) so that the refrigerant in a gas-liquid two-phase state flows through the gas extension pipe (15). The direction of the flow of the refrigerant inside the gas extension pipe (15) in the oil recovery operation mode is opposite to the direction of the flow of the refrigerant inside the gas extension pipe (15) in the heating operation mode.
Inventors:
ISHIYAMA HIROKI (JP)
Application Number:
PCT/JP2017/043118
Publication Date:
June 06, 2019
Filing Date:
November 30, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B13/00; F25B1/00
Foreign References:
| JP2005024168A | 2005-01-27 | |||
| JP2008209036A | 2008-09-11 | |||
| JP2007248001A | 2007-09-27 | |||
| JP2008180421A | 2008-08-07 | |||
| JP2008180420A | 2008-08-07 |
Other References:
See also references of EP 3719413A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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