空调外机的掉电检测方法、装置和空调
By detecting the bus capacitor voltage and adjusting the duty cycle, combined with sampling the filter capacitor voltage signal, the system achieves rapid power failure detection and bus voltage discharge for the outdoor unit of the inverter air conditioner in standby mode. This solves the problem of slow capacitor discharge in standby mode and improves safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2022-10-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technology cannot quickly detect power failure in the standby state of the outdoor unit of a variable frequency air conditioner, resulting in slow discharge of the bus capacitor and posing a safety hazard.
By detecting the voltage across the bus capacitor and adjusting the duty cycle of a preset signal, combined with real-time sampling of the filter capacitor voltage signal, it is determined whether the voltage signal undergoes periodic changes, and the IGBT is controlled to turn off, thereby achieving rapid discharge of the DC bus voltage.
Without increasing hardware costs, the time interval between power cut-off and bus voltage drop to a safe range has been shortened, improving the safety of the inverter air conditioner outdoor unit in standby mode.
Smart Images
Figure CN115598403B_ABST