Heat pump interoperating hot water feeding apparatus

摘要

A heat pump interoperating hot water feeding apparatus is provided that may determine whether to activate only the first coolant circulation circuit along which the first coolant is circulated or the first coolant circulation circuit as well as the second coolant circulation circuit along which the second coolant is circulated depending on an external air temperature or target water temperature, thus providing the optimal performance.

主权项

1. A heat pump interoperation hot water feeding apparatus comprising:
a first coolant circulation circuit that circulates a first coolant by a first compressor that compresses the first coolant; a second coolant circulation circuit that circulates a second coolant by a second compressor that compresses the second coolant; a used water circulation circuit that discharges used water that is heat exchanged with one of the first coolant and the second coolant; and a controller configured to operate the first coolant circulation circuit alone or both the first and second coolant circulation circuits depending on one of an external air temperature, a target water temperature of the used water, and indoor temperature, wherein the apparatus further comprising:
a first heat exchanger arranged at the first coolant circulation circuit, wherein the first heat exchanger primarily condenses the first coolant by allowing the first coolant to be heat exchanged with the used water flowing through the used water circulation circuit during a room heating operation;a second heat exchanger arranged at the second coolant circulation circuit, wherein the second heat exchanger primarily condenses the second coolant by allowing the second coolant to be heat exchanged with the used water flowing through the used water circulation circuit during a room heating operation, wherein the used water circulation circuit allows the used water to be heat exchanged with the first coolant or the second coolant through the first heat exchanger or the second heat exchanger depending on the target water temperature of the used water; anda cascade heat exchanger, wherein the first and second coolant circulation circuits partially cross each other therein so that during a room heating operation, the first coolant is primarily condensed by the used water circulation circuit and then heat exchanged with the second coolant to be secondarily condensed and the second coolant is heat exchanged with the first coolant to be evaporated.