The invention discloses a power supply circuit, a circuit fault detection method, a circuit board and a vehicle-mounted air conditioner. The power supply circuit comprises a boosted circuit, a first detection part and a controller, and the boosted circuit comprises a first voltage-multiplying part, a second voltage-multiplying part, a first switch part and a first capacitor; the first detection part is used for detecting current values flowing through the first switch part in different conduction periods; the controller is respectively connected with the first switch part and the first detection part; the controller is used for conducting the first switch component to enable the first voltage-multiplying part and the first switch part to form a first loop and enable the second voltage-multiplying part, the first capacitor and the first switch part to form a second loop; the controller is further used for detecting the fault state of the first capacitor according to the value of the current flowing through the first switch part. When the first capacitor is detected to be in the short-circuit state, a vehicle-mounted air conditioner can be controlled not to be repeatedly started anymore, and damage caused by repeated impact to the first switch part due to repeated starting is avoided.

    本发明公开了一种供电电路、电路故障检测方法、线路板及车载空调器,其供电电路包括升压电路、第一检测部件和控制器,升压电路包括第一倍压部件、第二倍压部件、第一开关部件和第一电容;第一检测部件用于检测于不同导通周期流经第一开关部件的电流值;控制器分别与第一开关部件和第一检测部件连接;控制器用于导通第一开关部件以使第一倍压部件与第一开关部件形成第一回路,且以使第二倍压部件与第一电容及第一开关部件形成第二回路;控制器还用于根据流经第一开关部件的电流值检测第一电容的故障状态。当检测到第一电容处于短路状态后则可以控制车载空调器不再反复开启,避免反复开启对第一开关部件进行反复冲击从而造成损坏。


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    Title :

    Power supply circuit, circuit fault detection method, circuit board and vehicle-mounted air conditioner


    Additional title:

    供电电路、电路故障检测方法、线路板及车载空调器


    Contributors:

    Publication date :

    2020-06-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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