Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1993-11-16
1995-09-05
Wayner, William E.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62335, F25B 700
Patent
active
054470382
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 and as a cascade system to provide multiple cooling temperatures for multiple loads each having a particular temperature requirement. There are multiple evaporator systems for cooling air which is used to cool the product; one evaporator system for each desired temperature. Each evaporator system is provided a thermal expansion valve, a corresponding thermostatic bulb and a thermostat to control the temperature in a corresponding chamber. The container is partitioned into chambers, each chamber having an evaporator system so that each evaporator system provides positive temperature control within its chamber. An evaporator pressure regulator is provided to manitain the evaporator pressure higher and thereby allow the several evaporators to maintain different pressures. The cascade cooling mode utilizing both compressors provides additional cooling capability for allowing even more temperature selectivity below 0.degree. F.
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Wayner William E.
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