Patent ID: 6230510
Filing Date: 2001-05-15
Classification: F24F

Abstract:
Retrofit conversion apparatus for replacing a self-contained package air conditioning unit of the type including within a single cabinet an indoor air heat exchange coil and an indoor air blower for circulating indoor air over the indoor air heat exchange coil, an outdoor air heat exchange coil and an outdoor air blower for circulating outdoor air over the outdoor air heat exchange coil, and a refrigerant compressor connected in a closed refrigerant circuit with the indoor air heat exchange coil and the outdoor air heat exchange coil, the self-contained package air conditioning unit being located within a building, and the single cabinet having an opening allowing outdoor air access to the outdoor air heat exchange coil through a corresponding opening in a wall of the building, and the single cabinet occupying a floor area within the building, said retrofit conversion apparatus comprising:an indoor unit including an indoor cabinet sized so as to occupy the same floor area as the single cabinet of the self-contained package air conditioning unit and so as to cover at least the opening in the wall of the building;said indoor cabinet including at least a machinery compartment;said indoor cabinet having at least one of a room air return opening communicating with indoor room air and a ventilation opening communicating with the opening in the wall of the building;said indoor cabinet having an air discharge opening;a water source heat pump within said machinery compartment, said water source heat pump including an indoor air heat exchanger, an external fluid heat exchanger, a system refrigerant compressor, and an indoor air mover connected for drawing air in through said at least one of a room air return opening and a ventilation opening, passing air over surfaces of said indoor air heat exchanger, and discharging air through said air discharge opening; andfluid line connections for connecting said external fluid heat exchanger to at least one of a heat source and a heat sink.