发明名称 |
VEHICLE AIR-CONDITIONING DEVICE, AND REFRIGERANT LEAKAGE DIAGNOSIS METHOD FOR VEHICLE AIR-CONDITIONING DEVICE |
摘要 |
<p>In a vehicle air-conditioning device, refrigerant leakage is diagnosed precisely without any restrictions from an operating condition of the air-conditioning device. When the operating condition of the vehicle air-conditioning device is stable, a threshold value Th for determination of refrigerant leakage is set based on an outlet pressure Pd and an inlet pressure Ps of a compressor. Furthermore, a volume flow Gr in that refrigerant pipe running from a condenser to an expansion valve through which the refrigerant circulates in a liquid state is detected. When it is determined that the volume flow Gr exceeds the threshold value Th for determination of refrigerant leakage, a diagnosis result (alarm) indicating that the refrigerant leaks is output.</p> |
申请公布号 |
EP2581242(A1) |
申请公布日期 |
2013.04.17 |
申请号 |
EP20110792303 |
申请日期 |
2011.05.27 |
申请人 |
SANDEN CORPORATION |
发明人 |
ISHIZEKI, TETSUYA;INOUE, ATSUO;TSUBOI, MASATO;SUZUKI, KENICHI;TAGAMI, SHINJI |
分类号 |
B60H1/22;F25B49/02 |
主分类号 |
B60H1/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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