HEAT PUMP WITH WATER HEATING

摘要

Heat pump systems and methods for providing chilled/hot liquid for air-conditioning and domestic hot-water, are provided. The heat pump systems include a first heat exchanger, a second heat exchanger and a third heat exchanger (e.g., a hot-water heat exchanger) that share at least one expansion valve disposed at a downstream position of the hot-water heat exchanger. The at least one expansion valve is disposed between the hot-water heat exchanger and the first and second heat exchangers. The heat pump systems can provide six operation modes, including a cooling mode, a heating mode, a water-heating mode, a heat-recovery mode, a simultaneous heating and water heating mode, and a defrost mode.

主权项

1. A refrigeration circuit, comprising:
a compressor; a first heat exchanger; a second heat exchanger; a third heat exchanger; and at least one expansion valve being disposed at a downstream position of the third heat exchanger, wherein the first, second and third heat exchangers share the at least one expansion valve, and the at least one expansion valve is disposed between the third heat exchanger and the first and second heat exchangers, wherein the refrigeration circuit is operable in a plurality of modes including a cooling mode, a heating mode, a water-heating mode, a heat-recovery mode, a simultaneous heating and water heating mode, and a defrost mode.