Patent ID: 9297567
Filing Date: 2016-03-29
CPC Classification: F25B,Y02B

Claim Text:
1. A condenser assembly through which a refrigerant is circulated to transfer heat from the refrigerant to ambient air in which the condenser assembly is at least partially disposed, the condenser assembly comprising: a compressor, for compressing and superheating the refrigerant; a crankcase heater for heating the compressor, the crankcase heater being energizable via a crankcase heater control circuit; a condenser in fluid communication with the compressor in which the refrigerant is received after exiting the compressor; at least one condenser fan, for moving the ambient air past the condenser to transfer heat from the refrigerant in the condenser to the ambient air; at least one electronically commutated condenser fan motor for rotating said at least one condenser fan, said at least one condenser fan motor being energizable via a condenser fan control circuit selected from the group consisting of a first condenser fan control circuit comprising first and second conductors and a second condenser fan control circuit comprising a third conductor; a condenser switch subassembly configured to control energization of the crankcase heater and said at least one condenser fan motor, the condenser switch subassembly being switchable between: an ambient temperature sensor for sensing at least one temperature of the ambient air, to provide a sensed temperature; the condenser switch subassembly comprising a single pole double throw switch controlled by the ambient temperature sensor such that, when the sensed temperature is equal to or less than a predetermined cut-in temperature, the condenser switch subassembly is in the first condition, and when the sensed temperature is greater than the predetermined cut-in temperature, the condenser switch subassembly is in the second condition; and a condenser fan controller configured to detect energization of the third conductor, to apply a first voltage to the condenser fan motor when energization of the third conductor is not detected thereby, and to apply a second voltage to the condenser fan motor when the third conductor is energized, the second voltage being greater than the first voltage.