Title:
VEHICULAR AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/070359
Kind Code:
A1
Abstract:
This vehicular air conditioning device (10) comprises: a compressor (31) that compresses a refrigerant; a condenser (32) that liquefies a refrigerant discharged from the compressor (31); expansion valves (41, 42) that decompress the liquefied refrigerant; evaporators (511, 521) that vaporize the decompressed refrigerant and absorb the heat; and a refrigerant circuit which circulates, to the compressor (31), the refrigerant discharged from the evaporators (511, 521), and in which oil is encapsulated together with the refrigerant. The vehicular air conditioning device (10) includes a control device (20) that controls the expansion valves (41, 42) and operation of the compressor (31), and oil sensors (71, 72, 73) provided to at least one among piping connecting the condenser (32) and the evaporators (511, 521), and piping connecting the condenser (32) and the evaporators (511, 521) in the refrigerant circuit. The control device (20) performs an oil return operation in accordance with an output of the oil sensors (71, 72, 73).
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Inventors:
KODERA SHUNSUKE (JP)
KAWAHARA FUMIKIYO (JP)
KAWAHARA FUMIKIYO (JP)
Application Number:
PCT/JP2023/030498
Publication Date:
April 04, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
B60H1/32; F25B1/00
Domestic Patent References:
| WO2022085125A1 | 2022-04-28 | |||
| WO2022176652A1 | 2022-08-25 |
Foreign References:
| JP2018177034A | 2018-11-15 | |||
| JP2022088798A | 2022-06-15 | |||
| JP2018040518A | 2018-03-15 | |||
| JP2020193725A | 2020-12-03 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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