US Patent No. 10,921,002

DEHUMIDIFIER WITH SECONDARY EVAPORATOR AND CONDENSER COILS IN A SINGLE COIL PACK


Patent No. 10,921,002
Issue Date February 16, 2021
Title Dehumidifier With Secondary Evaporator And Condenser Coils In A Single Coil Pack
Inventorship Steven S. Dingle, Madison, WI (US)
Scott E. Sloan, Sun Prairie, WI (US)
Weizhong Yu, Cottage Grove, WI (US)
Grant M. Lorang, Lake Mills, WI (US)
Todd R. DeMonte, Cottage Grove, WI (US)
Assignee Therma-Stor LLC, Madison, WI (US)

Claim of US Patent No. 10,921,002

1. A dehumidification system, the system comprising:a primary metering device;
a secondary metering device;
a coil pack, the coil pack comprising a secondary evaporator portion, a primary evaporator portion, and a secondary condenser portion:
the secondary evaporator portion operable to:
receive a flow of refrigerant from the primary metering device; and
receive an inlet airflow and output a first airflow, the first airflow comprising cooler air than the inlet airflow, the first airflow generated by transferring heat from the inlet airflow to the flow of refrigerant as the inlet airflow passes through the secondary evaporator portion;
the primary evaporator portion operable to:
receive the flow of refrigerant from the secondary metering device; and
receive the first airflow and output a second airflow, the second airflow comprising cooler air than the first airflow, the second airflow generated by transferring heat from the first airflow to the flow of refrigerant as the first airflow passes through the primary evaporator portion;
the secondary condenser portion operable to:
receive the flow of refrigerant from the secondary evaporator portion; and
receive the second airflow and output a third airflow, the third airflow comprising warmer and less humid air than the second airflow, the third airflow generated by transferring heat from the flow of refrigerant to the third airflow as the second airflow passes through the secondary condenser portion;
a sub-cooling coil operable to:
receive the flow of refrigerant from a primary condenser;
output the flow of refrigerant to the primary metering device; and
receive the third airflow and output a dehumidified airflow to a conditioned space, the dehumidified airflow comprising warmer and less humid air than the third airflow, the dehumidified airflow generated by transferring heat from the flow of refrigerant to the dehumidified airflow as the third airflow passes through the sub-cooling coil;
the primary condenser operable to:
receive the flow of refrigerant from a compressor; and
receive a first outdoor airflow from an unconditioned space and output a second outdoor airflow to the unconditioned space, the second outdoor airflow comprising warmer and less humid air than the first outdoor airflow, the second outdoor airflow generated by transferring heat from the flow of refrigerant to the second outdoor airflow as the first outdoor airflow passes through the primary condenser;
the compressor operable to receive the flow of refrigerant from the primary evaporator and provide the flow of refrigerant to the primary condenser, the flow of refrigerant provided to the primary condenser comprising a higher pressure than the flow of refrigerant received at the compressor; and
a fan operable to generate the inlet, first, second, third, and dehumidified airflows.