VEHICLE AIR-CONDITIONING DEVICE, AND REFRIGERANT LEAKAGE DIAGNOSIS METHOD FOR VEHICLE AIR-CONDITIONING DEVICE

WIPO Patent Application WO/2011/155346

A1

In order that in a vehicle air-conditioning device, the leakage of a refrigerant is accurately diagnosed without being restricted by the operating state of the device, when the operating state of the vehicle air-conditioning device is stable, a refrigerant leakage determination threshold (Th) is set on the basis of the outlet pressure (Pd) and inlet pressure (Ps) of a compressor and the volume flow rate (Gr) in a refrigerant pipe which leads from a condenser to an expansion pipe and through which a liquid refrigerant flows is detected, and when the volume flow rate (Gr) is determined to exceed the refrigerant leakage determination threshold (Th), a diagnosis result (warning) indicating that the refrigerant is leaking is outputted.

ISHIZEKI, Tetsuya (20 Kotobuki-cho, Isesaki-sh, Gunma 02, 〒3728502, JP)
石関　徹也 (〒02 群馬県伊勢崎市寿町２０番地　サンデン株式会社内 Gunma, 〒3728502, JP)
INOUE, Atsuo (20 Kotobuki-cho, Isesaki-sh, Gunma 02, 〒3728502, JP)
井上　敦雄 (〒02 群馬県伊勢崎市寿町２０番地　サンデン株式会社内 Gunma, 〒3728502, JP)
TSUBOI, Masato (20 Kotobuki-cho, Isesaki-sh, Gunma 02, 〒3728502, JP)

JP2011/062211

December 15, 2011

May 27, 2011

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SANDEN CORPORATION (20 Kotobuki-cho, Isesaki-shi Gunma, 02, 〒3728502, JP)
サンデン株式会社 (〒02 群馬県伊勢崎市寿町２０番地 Gunma, 〒3728502, JP)
ISHIZEKI, Tetsuya (20 Kotobuki-cho, Isesaki-sh, Gunma 02, 〒3728502, JP)
石関　徹也 (〒02 群馬県伊勢崎市寿町２０番地　サンデン株式会社内 Gunma, 〒3728502, JP)
INOUE, Atsuo (20 Kotobuki-cho, Isesaki-sh, Gunma 02, 〒3728502, JP)
井上　敦雄 (〒02 群馬県伊勢崎市寿町２０番地　サンデン株式会社内 Gunma, 〒3728502, JP)

B60H1/22; F25B49/02

SASAJIMA, Fujio et al. (7th Floor, Akasaka Eight One Building 13-5, Nagata-cho 2-chome, Chiyoda-k, Tokyo 14, 〒1000014, JP)

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