Title:
REFRIGERANT CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/158652
Kind Code:
A1
Abstract:
When the specifications for a shutoff valve become excessive, the manufacturing cost increases. An air-conditioning device (1) in which a lightly flammable refrigerant is circulated in a refrigerant circuit (10) is equipped with a first shutoff valve (71a) and a second shutoff valve (68a) for suppressing leakage of refrigerant to a prescribed space. For both the first shutoff valve (71a) and the second shutoff valve (68a) in a shutoff state, the shutoff leakage amount, which is the amount of leakage of air when the fluid is air at 20°C and the pressure across the valve is 1 MPa, is greater than 300 (cm3/min) and less than 300×R (cm3/min), where R = (ρmd\×Vmd×Ad)/Cr×(2×ΔPr/ρ1r)0.5×Av×ρ1rl+Av×(2/(λ+1))((λ+1)/2(λ-1))×(λxP1r×ρ1rg)0.5).
Inventors:
YAJIMA RYUUZABUROU
Application Number:
PCT/JP2020/002729
Publication Date:
August 06, 2020
Filing Date:
January 27, 2020
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B49/02; F25B1/00
Domestic Patent References:
| WO2016208470A1 | 2016-12-29 | |||
| WO2015152163A1 | 2015-10-08 | |||
| WO2014034099A1 | 2014-03-06 |
Foreign References:
| JP2000186863A | 2000-07-04 |
Other References:
See also references of EP 3919840A4
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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