Absorption type large-temperature-difference heat exchanger unit and heat supply network system

The utility model provides an absorption type large-temperature-difference heat exchange unit and a heat supply network system, and a medium flowing into the unit in a primary side liquid return pipeof the unit directly flows into a secondary side water supply pipe to form a partial heat supply source after being subjected to heat exchange by a generator. Meanwhile, media flowing out of the condenser or/and the absorber also flow into a secondary side water supply pipe to form another part of heat supply sources, the two parts of heat supply sources are mixed and then enter a secondary side system for heat exchange, and the secondary side water return part subjected to heat exchange enters an evaporator and then flows into a primary side system to form a first circulating flow path afterheat exchange through the evaporator; the other part of the secondary side return water flows into the condenser or/and the absorber to be heated and flows into the secondary side water supply pipe again to form a second circu