Abstract: Mini, split-system dehumidifier that provides three modes of operation: heating and dehumidification, cooling and dehumidification, and dehumidification only. The dehumidifier maintains a set temperature of the supply air by controlling the amount of heat of rejection at the primary condenser that is cycled back into the supply air.

Abstract: A heat pump system dehumidifies air in an enclosure containing a source of humidity such as a swimming pool. The heat pump system invention transfers rejection heat from the primary refrigerant loop to a secondary water loop. The secondary water loop is coupled in heat exchange relationship to the primary condenser of the primary refrigerant loop for receiving the rejection heat including the latent heat and sensible heat from the refrigerant. The secondary water loop incorporates a circulating water pump and a storage tank and affords a substantially uniform load on the compressor, condenser and refrigerant of the refrigerant loop. The secondary water loop then provides versatility and flexibility in meeting variable load demand such as conditioning the enclosure air, heating water in open receptacles such as pools, dumping heat outside the enclosure, or adding heat to the enclosure. The secondary water loop displaces the variable load requirements from direct impact on the primary refrigerant loop.

Abstract: Apparatus for dehumidifying or otherwise conditioning the air in a room has a cabinet housing a pair of units side by side. Each unit is essentially a conventional dehumidifier but has its evaporator and evaporator fan above its condenser, compressor and condenser fan and is separated therefrom to establish an upper evaporator section and a lower condenser section. The cabinet has outside air inlet ports opening into the upper and lower sections with each controlled by adjustable dampers. The cabinet also has a port through which air is discharged to the outside by the condenser fans. Separate conditioned air outlets open from the upper section into the room. In addition, the cabinet has ports in its ends to admit air from the room into the upper and lower sections and these are also provided with adjustable dampers.