Title:
FREEZING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/189874
Kind Code:
A1
Abstract:
A compressor unit (20) of a refrigerant circuit (15) is provided with a compressor (30), an oil separator (40), an oil returning pipe (45), an oil returning valve (46), and a discharge temperature sensor (50). A freezing apparatus (10) is provided with a controller (60). The controller (60) performs detection operation. The detection operation is operation in which the degree of opening of the oil returning valve (46) is reduced and, on the basis of change of a measurement value of the discharge temperature sensor (50) after the degree of the opening of the oil returning valve (46) is reduced, with respect to the measurement value of the discharge temperature sensor (50) before the degree of the opening of the oil returning valve (46) is reduced, it is detected that a gas refrigerant is flowing in the oil returning pipe (45).
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| JPH05322323 | FREEZER DEVICE |
Inventors:
KABASHIMA NOBUTAKA (JP)
Application Number:
PCT/JP2023/011069
Publication Date:
October 05, 2023
Filing Date:
March 22, 2023
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B1/00; F24F11/89; F25B49/02
Domestic Patent References:
| WO2020241622A1 | 2020-12-03 |
Foreign References:
| JP2006214602A | 2006-08-17 | |||
| JP2006207917A | 2006-08-10 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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