Second type absorption heat pump

The invention discloses a second type absorption heat pump which comprises a generator, a condenser, an absorber and an evaporator, as well as a vapor-liquid separator, wherein the vapor-liquid separator separates a to-be-heated medium flowing out of the absorber into a vapor state medium and a liquid state medium, and is arranged above the absorber, so that the to-be-heated medium completes circulation between the vapor-liquid separator and the absorber depending on natural circulation, without other power components. The second type absorption heat pump simply additionally adopts the vapor-liquid separator, and then steam can be separated from the to-be-heated medium flowing out of the absorber and is provided for customers for use, so that a system structure of preparing the steam is simplified greatly; the input cost of a unit in the early stage can be reduced; and no power components are adopted, so that the energy consumption cost in a unit operation process can be reduced greatly. In addition, compared with the prior art adopting a huge-size flash system, a floor space is reduced greatly.