FAILURE DIAGNOSIS DEVICE OF AUTOMOBILE AIR CONDITIONER AND FAILURE DIAGNOSIS METHOD

PROBLEM TO BE SOLVED: To provide a failure diagnosis device of an automobile air conditioner which has versatility to a variety of air-conditioning conditions and vehicle conditions, and can diagnose a failure at cooling and heating in a short time, and failure diagnosis method.SOLUTION: In a failur...

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1. Verfasser: HATTORI SHIRO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a failure diagnosis device of an automobile air conditioner which has versatility to a variety of air-conditioning conditions and vehicle conditions, and can diagnose a failure at cooling and heating in a short time, and failure diagnosis method.SOLUTION: In a failure diagnosis device of an automobile air conditioner, when a compressor 142 is operated at a cooling mode at which an air mix door 160 increases a cold wind volume with respect to a hot wind volume, a cold wind temperature detected by a cold wind temperature sensor 146 is not lowered within a period from an operation of the compressor 142 up to the lapse of a prescribed time, and high-pressure side pressure detected by a pressure sensor 145 is not raised within a period from the operation of the compressor 142 up to the lapse of the prescribed time, a control part 210 determines a cooling abnormality.SELECTED DRAWING: Figure 1 【課題】種々の空調条件や車両条件に対して汎用性をもって、且つ、短時間で、冷房時あるいは暖房時における故障診断を実施可能とする、自動車用空調装置の故障診断装置および故障診断方法を提供する。【解決手段】自動車用空調装置の故障診断装置において、制御部210は、エアミックスドア160が温風量に対して冷風量を増加させる冷房時において、圧縮機142が作動されており、冷風温度センサ146によって検出される冷風温度が圧縮機142の作動時から所定時間経過までの間に低下しておらず、更に、圧力センサ145によって検出される高圧側圧力が圧縮機142の作動時から所定時間経過までの間に上昇してない場合に、冷房異常であると判定する。【選択図】図1