Heat pump charge compensation for heating mode operation
AssigneeAllied Air Enterprises LLC
InventorKrishna Conjeevaram Bashyam
Life of this patent
Estimating the term…
Abstract
An HVAC system includes a first heat exchange coil with a plurality of coil circuits. For each coil circuit of the plurality of circuits, there is a manifold line fluidly coupling the coil circuit to a compressor of the HVAC system. A check valve is positioned in a first manifold line coupling a first coil circuit of the plurality of coil circuits to the compressor. The check valve is configured to allow flow of refrigerant from the compressor to the first coil circuit when the HVAC system is operating in a cooling mode and prevent flow of refrigerant from the first coil circuit to the compressor when the HVAC system is operating in a heating mode.
Claims20
A heating, ventilation, and air conditioning (HVAC) system configured to regulate a temperature of a space, the HVAC system comprising:
- a first heat exchange coil comprising a plurality of coil circuits;
- for each coil circuit of the plurality of circuits, a manifold line fluidly coupling the coil circuit to a compressor of the HVAC system;
- a check valve positioned in a first manifold line coupling a first coil circuit of the plurality of coil circuits to the compressor, wherein the check valve is configured to:
- allow flow of refrigerant from the compressor to the first coil circuit when the HVAC system is operating in a cooling mode;
- and
- prevent flow of refrigerant from the first coil circuit to the compressor when the HVAC system is operating in a heating mode.
A heating, ventilation, and air conditioning (HVAC) system configured to regulate a temperature of a space, the HVAC system comprising:
- a first heat exchange coil comprising a plurality of coil circuits;
- for each coil circuit of the plurality of circuits, a manifold line fluidly coupling the coil circuit to a compressor of the HVAC system;
- a check valve positioned in a first manifold line coupling a first coil circuit of the plurality of coil circuits to the compressor, wherein the check valve is configured to prevent flow of refrigerant from the first coil circuit to the compressor when the HVAC system is operating in a heating mode;
- and
- a controllable valve located in a conduit fluidly coupling the first coil circuit to a second heat exchange coil and configured to be open for at least a period of time when the HVAC system is operating in the heating mode, such that refrigerant is stored in the first coil circuit.
A heating, ventilation, and air conditioning (HVAC) system configured to regulate a temperature of a space, the HVAC system comprising:
- a first heat exchange coil comprising a plurality of coil circuits;
- a second heat exchange coil;
- an expansion valve positioned between the first heat exchange coil and the second heat exchange coil;
- an expansion valve bypass line fluidly coupling a first coil circuit of the plurality of coil circuits to the second heat exchange coil and bypassing the expansion valve;
- and
- a check valve positioned in the expansion valve bypass line coupling the first coil circuit to the second heat exchange coil, wherein the check valve is configured to:
- allow flow of refrigerant from the first coil circuit to the second heat exchange coil when the HVAC system is operating in a cooling mode;
- and
- prevent flow of refrigerant from the second heat exchange coil to the first coil circuit when the HVAC system is operating in a heating mode.
Dependencies are inferred from the claim text.