Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/225177
Kind Code:
A1
Abstract:
The present invention prevents pooling of refrigerant or refrigerant oil in a high-pressure gas interconnection pipe. This refrigeration cycle device (1) comprises a primary-side refrigerant circuit (5a) and a secondary-side refrigerant circuit (10). The primary-side refrigerant circuit (5a) is for circulating a first refrigerant and includes a primary-side compressor (71), a primary-side flow passage (35b) of a cascade heat exchanger (35), a primary-side heat exchanger (74), and a primary-side switching mechanism (72). The secondary-side refrigerant circuit (10) is for circulating a second refrigerant and includes: a secondary-side compressor (21); a secondary-side flow passage (35a) of the cascade heat exchanger (35); a secondary-side switching mechanism (22); an inflow passage (23); a plurality of use-side heat exchangers (52a, 52b, 52c); a secondary-side first interconnection pipe (8), a first heat source-side pipe (28), a first branching pipe (63a, 63b, 63c), a merging pipe (62a, 62b, 62c), a first connection pipe (15a, 15b, 15c), and a first use-side pipe (57a, 57b, 57c) that interconnect the secondary-side switching mechanism (22) and the plurality of use-side heat exchangers (52a, 52b, 52c); a secondary-side second interconnection pipe (9), a second heat source-side pipe (29), a second branching pipe (64a, 64b, 64c), the merging pipe (62a, 62b, 62c), the first connection pipe (15a, 15b, 15c), and the first use-side pipe (57a, 57b, 57c) that connect the inflow passage (23) to the plurality of use-side heat exchangers (52a, 52b, 52c); and a secondary-side third interconnection pipe (7), a fourth heat source-side pipe (26), a fifth heat source-side pipe (27), a third branching pipe (61a, 61b, 61c), a second connection pipe (16a, 16b, 16c), and a second use-side pipe (56a, 56b, 56c) that connect the secondary-side flow passage (35a) of the cascade heat exchanger (35) to the plurality of use-side heat exchangers (52a, 52b, 52c).
Inventors:
IYOSHI YUUTA
YAMANOI YOSHIKI
SAEKI KUMIKO
YAMANOI YOSHIKI
SAEKI KUMIKO
Application Number:
PCT/JP2021/017705
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
Domestic Patent References:
| WO2018235832A1 | 2018-12-27 | |||
| WO2006013769A1 | 2006-02-09 | |||
| WO2018235832A1 | 2018-12-27 |
Foreign References:
| JP2013210150A | 2013-10-10 | |||
| JPS5938568A | 1984-03-02 | |||
| JP2007218460A | 2007-08-30 | |||
| JP2008039332A | 2008-02-21 |
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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