Multifunctional hot water system for air conditioner

A multifunctional hot water system for an air conditioner comprises an outdoor unit, an indoor unit, a water-fluorine exchange unit and a water tank, and is characterized in that the outdoor unit consists of a compressor, a four-way valve, an outdoor heat exchanger and an outdoor electronic expansion valve, the indoor unit consists of an indoor heat exchanger and an indoor electronic expansion valve, the water-fluorine exchange unit consists of a water-fluorine heat exchanger, a water circulator and a water pump, the water tank is internally provided with a coil pipe which is connected with the water circulator and the water pump by a pipe, an exhaust port of the compressor is connected with a d end and a c end of the four-way valve, the outdoor heat exchanger, the outdoor electronic expansion valve, the indoor electronic expansion valve, the indoor heat exchanger, an e end and an s end of the four-way valve and an air inlet of the compressor in sequence by pipes, and the exhaust port of the compressor and a liquid pipe between the outdoor heat exchanger and the indoor heat exchanger are further connected with the water-fluorine heat exchanger by pipes. When the system carries out hot water making through refrigerating heat recovery, separate heating and the heat pump, high-temperature and high-pressure gas exhausted by the compressor all enters the water-fluorine heat exchanger for heat exchange, so that energy loss is less.