Title:
VEHICLE AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/090122
Kind Code:
A1
Abstract:
[Problem] To suppress a refrigerant from staying in an external heat exchanger during a hot gas heating operation, and to ensure heating capability during the hot gas heating operation. [Solution] This vehicle air conditioning device comprises a control device that controls a refrigerant circuit, a heat medium circuit, and an air conditioning unit, wherein: the refrigerant circuit has a hot gas bypass that decompresses at least a portion of a refrigerant compressed by a compressor without passing through an indoor heat exchanger and an external heat exchanger, and returns the decompressed portion to the compressor; the control device can execute a hot gas heating operation for heating the inside of a vehicle cabin by heat-dissipating the portion of the refrigerant compressed by the compressor with the indoor heat exchanger, without causing the refrigerant to absorb heat in the external heat exchanger, and a heat absorption heating operation for causing the refrigerant to absorb heat in the external heat exchanger; it is determined whether refrigerant recovery from the external heat exchanger is necessary, and if it is determined that the refrigerant recovery is necessary, a refrigerant recovery process for recovering the refrigerant from the external heat exchanger is performed after the execution of the previous air conditioning operation, or before the execution of the hot gas heating operation.
Inventors:
OKADA MIZUKI (JP)
HUANG YUNSHENG (JP)
MAJIMA HIROTO (JP)
ZHANG HONGMING (JP)
HUANG YUNSHENG (JP)
MAJIMA HIROTO (JP)
ZHANG HONGMING (JP)
Application Number:
PCT/JP2023/035333
Publication Date:
May 02, 2024
Filing Date:
September 28, 2023
Export Citation:
Assignee:
SANDEN CORP (JP)
International Classes:
B60H1/22; B60H1/32; F25B1/00
Foreign References:
| JP2021156567A | 2021-10-07 | |||
| JP2001050572A | 2001-02-23 | |||
| JPH11105541A | 1999-04-20 |
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