Systems and Methods to Control Operation of Heat Pump Assemblies Having Reheat Coils

A heat pump system comprising:

• a heat pump assembly comprising a plurality of components connected in series via a refrigerant tubing, wherein a refrigerant flows through the plurality of components via the refrigerant tubing and wherein the plurality of components comprises a compressor, a first heat exchanger, a second heat exchanger, and an expansion device;
• a reversing valve configured to reverse a flow of refrigerant in the heat pump assembly to switch an operating mode of the heat pump system between a heating mode and a cooling mode, wherein the compressor outputs the refrigerant to the first heat exchanger when the operating mode is the cooling mode and wherein the compressor outputs the refrigerant to the second heat exchanger when the operating mode is the heating mode;
• a reheat coil configured to receive the refrigerant from the compressor;
• and
• a modulating valve configured to control the flow of refrigerant in the reheat coil, wherein the modulating valve is configured to route hot refrigerant from the compressor to the reheat coil when the heat pump system is operating in the heating mode, and wherein the refrigerant output from the reheat coil is routed, via the modulating valve, towards an outlet port of the expansion device.

A heat pump system comprising:

• a heat pump assembly comprising a plurality of components connected in series via a refrigerant tubing, wherein a refrigerant flows through the plurality of components via the refrigerant tubing and wherein the plurality of components comprises a compressor, a first heat exchanger, a second heat exchanger, and an expansion valve;
• a first reversing valve configured to reverse a flow of refrigerant in the heat pump assembly to switch an operating mode of the heat pump system between a heating mode and a cooling mode, wherein the compressor outputs the refrigerant to the first heat exchanger when the operating mode is the cooling mode and wherein the compressor outputs the refrigerant to the second heat exchanger when the operating mode is the heating mode;
• a reheat coil configured to receive the refrigerant from the compressor;
• a solenoid valve configured to operate in a fully closed position and a fully open position, wherein the solenoid valve is configured to control the flow of refrigerant in the reheat coil, wherein the solenoid valve is configured to route hot refrigerant from the compressor to the reheat coil when the heat pump system is operating in the heating mode, and wherein the refrigerant output from the reheat coil is routed, via the solenoid valve, towards an inlet port of the expansion valve;
• and
• a second reversing valve configured to enable the flow of refrigerant from the reheat coil to the second heat exchanger via the expansion valve when the operating mode is the cooling mode and enable the flow of refrigerant from the reheat coil to the first heat exchanger via the expansion valve when the operating mode is the heating mode.