Energy-saving air source heat pump multi-split cold and hot water system

The invention relates to the technical field of multi-split heat pump air conditioners, and discloses an energy-saving air source heat pump multi-split cold and hot water system which comprises an indoor unit and an outdoor unit. The outer side of the first heat exchanger communicates with a first refrigerant port, a first water inlet end, a second refrigerant port and a third water outlet end, and the outer side of the water tank communicates with a first water outlet end, a second water outlet end, a second water inlet end and a third water inlet end. The refrigerant can provide cold and hot water in the water tank of the indoor unit, the refrigerant of the first heat exchanger releases heat or absorbs heat and exchanges heat with cold and water in the water tank, finally cold and hot water meeting the requirements is provided for a load end, the hot water requirements of air source heat pumps in different places are met, cold and hot air are provided indoors, and meanwhile cold and hot water is provided. A