Patent ID: 11892215
Assignee: A. O. SMITH CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. The control method according to claim 1, wherein the heat pump unit has a compressor and a heat exchange module for exchanging heat between a refrigerant and water; wherein the heat exchange module has a water outlet and a water return port; and wherein the control method further comprises:
determining an actual return water temperature of the heat pump unit in a heating mode is not lower than a set return water temperature or determining the actual return water temperature in a cooling mode is not higher than the set return water temperature, and
shutting down the compressor in response to determining that the actual return water temperature of the heat pump unit in the heating mode is not lower than the set return water temperature or determining the actual return water temperature in the cooling mode is not higher than the set return water temperature.