Abstract: The generator of an absortion heat pump is consructed in the form of a vortex chamber. The absorbent liquid solution, with a high concentration of refrigerant, is tangentially injected into a vortex chamber wherein the rotational velocity is significantly increased toward the center by reason of the conservative of rotational momentum, and as a result, pressure within the central portion of the vortex chamber is reduced such that the solution at a lower temperature than normally required in conventional absorption heat pump generators. The evolved swirling refrigerant vapor will rise and leave the first vortex chamber through a central opening to flow, in one chamber which is directly above the first vortex chamber.