Solar air source heat pump triple co-generation system and control method thereof

The invention discloses a solar air source heat pump triple co-generation system and a control method thereof. The solar air source heat pump triple co-generation system comprises a solar heat collecting evaporator unit, an air source heat pump host unit, a hot water unit and an indoor tail end unit, wherein the solar heat collecting evaporator unit, the hot water unit and the indoor air conditioner tail end unit are connected with the air source heat pump host unit. By means of the above manner, the solar air source heat pump triple co-generation system and the control method thereof can achieve three major functions including efficient heat supply, refrigerating and water heating and any combination of the three major functions, solar energy or an air source can serve as a low-temperature source to supply heat or heat water to an indoor part, and water heating is achieved while indoor refrigerating is achieved in summer. The system has a high comprehensive energy efficiency ratio, the system can be unlimite