Title:
REFRIGERATION CYCLE SYSTEM, HEAT SOURCE UNIT, AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/225176
Kind Code:
A1
Abstract:
The present invention suppresses pooling of a refrigerant or a freezer oil in low-pressure gas connection piping. A refrigeration cycle system (1) comprises: a heat source unit (2) having a heat source circuit (12) that includes a secondary-side compressor (21), a cascade heat exchanger (35), a secondary-side switching mechanism (22) for switching a flow path positioned between discharge piping (24) and the cascade heat exchanger (35), and an inlet flow path (23); a plurality of usage units (3a, 3b, 3c) each having a usage circuit (13a, 13b, 13c) that includes a usage-side heat exchanger (52a, 52b, 52c); a third interconnection pipe (7); fourth heat source piping (26); fifth heat source piping (27); a first interconnection pipe (8); first heat source piping (28); a second interconnection pipe (9); and second heat source piping (29). The heat source unit (2) has an opening/closing control valve (47) provided to the second heat source piping (29).
Inventors:
YAMANOI YOSHIKI
IYOSHI YUUTA
IYOSHI YUUTA
Application Number:
PCT/JP2021/017689
Publication Date:
November 11, 2021
Filing Date:
May 10, 2021
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B7/00; F25B1/00; F25B13/00; F25B29/00
Foreign References:
| JP2019020090A | 2019-02-07 | |||
| JP2001336856A | 2001-12-07 |
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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