Communication control circuit, multi-connected air conditioner and control method

• Main Authors: NIU SHIBO, YUAN ZHICHAO
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

The invention discloses a communication control circuit, a multi-connected air conditioner and a control method. The circuit is applied to the multi-connected air conditioner comprising an outdoor unit and a plurality of indoor units, and each indoor unit comprises a first port connected with a main power supply loop and a second port and a third port connected with a standby power supply loop. The circuit comprises a communication maintaining unit and a main power supply unit, wherein the communication maintaining unit is used for supplying power to the second port and the third port based on the standby power supply loop when the main power supply loop is disconnected, and disconnecting the standby power supply loop when the main power supply loop is not disconnected; the main power supply unit is used for supplying power to the first port based on the main power supply loop; and the first port is a power supply port of the indoor unit, and the second port and the third port are power supply ports of a main