Double-cold-source air source heat pump unit with total heat recovery function

The utility model belongs to the technical field of heat pump machinery, and particularly relates to a double-cold-source air source heat pump unit with a total heat recovery function. The heat pump comprises a compressor, a four-way reversing valve, a combined type water cooling condenser, a shell and tube heat exchanger, a finned heat exchanger, a first one-way valve, a second one-way valve, a first electromagnetic valve, a second electromagnetic valve, a first throttling valve, a second throttling valve, a gas-liquid separator, a cooling tower, a cooling water pump, a water way one-way valve and a water way valve set which are connected in a refrigeration cycle. By controlling the states of the four-way reversing valve, the first electromagnetic valve, the second electromagnetic valve and the waterway valve group and controlling the flowing state of water in the composite water-cooling condenser and the shell and tube heat exchanger, five functions of refrigeration, refrigeration and total heat recovery, h