Title:
REFRIGERANT LEAKAGE DETECTION DEVICE, AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/186105
Kind Code:
A1
Abstract:
This refrigerant leakage detection device (30) is provided with a refrigerant amount calculation unit (30a) which calculates a refrigerant amount (Ca) in a circulation circuit (200) on the basis of physical quantities including the temperature and the pressure of the refrigerant circulating in the circulation circuit. Furthermore, the refrigerant leakage detection device is provided with a gradient calculation unit (30b) which calculates a refrigerant leakage gradient (Cs) indicating the amount of leakage of the refrigerant per unit period, on the basis of the refrigerant amount calculated by the refrigerant amount calculation unit. Moreover, the refrigerant leakage detection device is provided with an abnormality determination unit (30c) which compares the refrigerant leakage gradient calculated by the gradient calculation unit with a predicted leakage gradient (Csth) assumed in advance, to determine whether the leakage state of the refrigerant in the circulation circuit is an abnormal leakage state.
Inventors:
MIDORIKAWA MARO (JP)
Application Number:
PCT/JP2018/009190
Publication Date:
October 11, 2018
Filing Date:
March 09, 2018
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F25B49/02
Domestic Patent References:
| WO2008035418A1 | 2008-03-27 |
Foreign References:
| JP2002005548A | 2002-01-09 | |||
| JP2000274894A | 2000-10-06 | |||
| JP2002039649A | 2002-02-06 | |||
| JP2011255831A | 2011-12-22 | |||
| DE102013220369A1 | 2015-04-09 | |||
| US9435576B1 | 2016-09-06 |
Attorney, Agent or Firm:
YOU-I PATENT FIRM (JP)
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