Title:
REFRIGERATION CYCLE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/118841
Kind Code:
A1
Abstract:
The present invention ensures heat for defrosting a primary-side heat exchanger. The present invention is provided with: a primary-side refrigerant circuit (5a), which has a primary-side compressor (71), a cascade heat exchanger (35), a primary-side heat exchanger (74), and a primary-side switching mechanism (72), and which circulates a primary-side refrigerant; a secondary-side refrigerant circuit (10), which has a secondary-side compressor (21), a cascade heat exchanger (35), and usage-side heat exchangers (52a, 52b, 52c), and which circulates a secondary-side refrigerant; and indoor fans (53a, 53b, 53c) for supplying air for exchanging heat with the secondary-side refrigerant flowing in the usage-side heat exchangers (52a, 52b, 52c). When a defrosting condition is satisfied during normal operation, the indoor fans (53a, 53b, 53c) are stopped and the secondary-side compressor (21) is operated, after which a first-side refrigerant is circulated sequentially through the primary-side compressor (71), the primary-side heat exchanger (74), and the cascade heat exchanger (35).
Inventors:
IYOSHI YUTA
YAMANOI YOSHIKI
SAEKI KUMIKO
YAMANOI YOSHIKI
SAEKI KUMIKO
Application Number:
PCT/JP2021/043881
Publication Date:
June 09, 2022
Filing Date:
November 30, 2021
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B1/00; F25B7/00; F25B47/02
Domestic Patent References:
| WO2012128229A1 | 2012-09-27 |
Foreign References:
| JP2014109405A | 2014-06-12 | |||
| JPH07120121A | 1995-05-12 | |||
| JPS6365245A | 1988-03-23 | |||
| JPS6358048A | 1988-03-12 | |||
| JPS6315023A | 1988-01-22 | |||
| JP2014109405A | 2014-06-12 |
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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