Circuit for improving zero-cross detection anti-interference performance of air conditioner controller

• Main Authors: REN XIAOLIN, WANG XIAOMING, XU ZHILIANG, SHI JINMING, LI JINWU
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model provides a circuit for improving zero-cross detection anti-interference performance of an air conditioner controller. The circuit is characterized by comprising a voltage reduction module and a zero-cross detection module, the input end of the zero-cross detection module is connected with an L line or an N line through the voltage reduction module; when the input end of the zero-cross detection module is connected with an L line, the zero-cross detection module outputs a low level when the positive half-wave voltage of the L line is effective, and the zero-cross detection module outputs a high level when the negative half-wave voltage of the N line is effective. When the input end of the zero-cross detection module is connected with the N line, the zero-cross detection module outputs low level when the negative half-wave voltage of the N line is effective, and the zero-cross detection module outputs high level when the positive half-wave voltage of the L line is effective. Half-wave detectio