Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1993-11-16
1995-06-20
Wayner, William E.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62335, F25B 700
Patent
active
054252440
ABSTRACT:
A broad range cooling system is provided which can operate over a temperature range of -25.degree. F. to 75.degree. F. under any expected ambient temperatures. The system includes two compressor systems which are configurable to operate independently, or as a cascade system, depending upon the desired temperature requirements of the load in relation to the ambient. There are two separate evaporator systems for cooling air which is used to cool the product; one evaporator system for each compressor. In single compressor mode, the selected compressor is used to cool its respective evaporator system and each compressor system is automatically configured to utilize the primary condenser to convert hot gas to a liquid. In cascade cooling mode, the lower compressor system is automatically reconfigured to utilize an evaporator side of a heat exchanger to convert hot gas to a liquid and to utilize the primary condenser to evaporate the liquid to a cold gas while absorbing heat. The upper cascade compressor system is automatically reconfigured to use the primary condenser to convert hot gas to a liquid and to use its respective evaporator for cooling the load. In the event of a failure of one or the other compressor, the system is configured to continue operation with the other compressor until a repair can be affected.
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Wayner William E.
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