Patent ID: 8769969

Claim:
A dehumidifier comprising: a cabinet; a compressor in the cabinet for delivering hot compressed refrigerant; a condenser coil in the cabinet and receiving refrigerant from the compressor and condensing same; an expansion device in the cabinet and receiving refrigerant from the condenser coil and expanding same; an evaporator coil in the cabinet and receiving refrigerant from the expansion device and evaporating same, and delivering the refrigerant to the compressor; the refrigerant being circulated from the compressor to the condenser coil to the expansion device to the evaporator coil and back to the compressor in a refrigeration cycle; the cabinet having an airflow path therethrough comprising: a first segment passing ambient air through a heat exchanger to the evaporator coil, a second segment passing air from the evaporator coil to the condenser coil, a third segment discharging air from the condenser coil, a fourth segment passing ambient air to the evaporator coil; and a first bypass door selectively positionable to variably control airflow along the fourth segment.