Patent ID: 11906188
Assignee: JOHNSON CONTROLS TYCO IP HOLDINGS LLP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 16:
17. An energy efficient heat pump for a heating, ventilation, and air conditioning (HVAC) system, comprising:
a first compressor disposed along a working fluid circuit and configured to direct a working fluid through the working fluid circuit in a first direction;
a second compressor disposed along the working fluid circuit and configured to direct the working fluid through the working fluid circuit in a second direction, opposite the first direction, wherein the first compressor and the second compressor are arranged in parallel with one another relative to a flow of the working fluid along the working fluid circuit; and
a controller configured to:
operate the first compressor and suspend operation of the second compressor in a cooling mode of the energy efficient heat pump;
operate the second compressor and suspend operation of the first compressor in a heating mode of the energy efficient heat pump; and
operate the first compressor and suspend operation of the second compressor in a defrost mode of the energy efficient heat pump to adjust flow of the working fluid through the working fluid circuit from the second direction to the first direction.