Patent ID: 8881546

Claim:
An absorption heat pump comprising: a generator or desorber which generates vapour from a first fluid, a first line for feeding the vapor to a first condenser in heat exchange contact with a transmission fluid, downstream of the condenser a second line being provided for feeding refrigerant liquid into a liquid/vapor separator, upstream of the evaporator a first thermal expansion valve is provided, an outlet of the evaporator being connected by a third line to a vapor inlet of a first mixer that is part of a low pressure absorber unit, the absorber unit comprising an enriched solution outlet connected to a suction side of a pump, the delivery side of the pump is connected to the generator by a fourth line for feeding solution, the generator comprising a poor solution outlet connected by a sixth line provided with at least one thermal expansion valve to a poor solution inlet feeding the absorber, the second line is brought into heat exchange contact with the low pressure absorber and comprises a thermal expansion valve upstream of the low pressure absorber, a separator liquid outlet feeding the evaporator via an evaporator feed line, the vapour outlet of the separator opening into an intermediate pressure absorber unit via a fifth line; wherein an outlet of the intermediate pressure absorber is connected to a suction side of a second pump, the delivery side of the second pump is connected to an eighth line opening into the generator, the fourth line opening into a second mixer and then into a first heat exchanger, wherein the intermediate pressure absorber unit comprises the second mixer and the first heat exchanger.