Heat pump has bypass limiting condensate flow through internal heat exchanger if large temperature difference between evaporation, condensation sides/very low evaporation temperatures

摘要

The device has a coolant circuit via a heat exchanger, compressor, at least one heat exchanger in hot water and heating circuits and an expansion valve. Additional internal heat exchange occurs between coolant suction gas and condensate in a further heat exchanger. A bypass limits condensate flow through the internal heat exchanger for a large temperature difference between evaporation and condensation sides or very low evaporation temperatures. The device has a coolant circuit through a heat exchanger (WUe1) in the form of an evaporator, a compressor (V), at least one heat exchanger (WUe2,WUe3) for condensation in working circuits (NK1,NK2) for heating and hot water supply and an expansion valve (EV). Additional internal heat exchange takes place between the coolant suction gas and the condensate in a further heat exchanger (Wue4) in accordance with patent claim 100 29 655.6. A bypass limits the flow of condensate through the internal heat exchanger in the event of a large temperature difference between the evaporation and condensation sides or for a very low evaporation temperatures.