Method for controlling temperature in multiple compartments...

Details Method for controlling temperature in multiple compartments... Method for controlling temperature in multiple compartments...

2011-05-10

2011-05-10

Norman, Marc E (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S513000, C165S208000

Reexamination Certificate

active

07937962

ABSTRACT:
A refrigerated transport system includes a prioritizing algorithm to limit the maximum amount of refrigerant flow available to at least one limited cooling compartment by holding a delta T (difference between the supply air temperature and return air temperature) instead of a setpoint temperature in the at least one limited cooling compartment when the available cooling capacity is insufficient to hold a substantially constant temperature in all compartments. A method for creating multiple refrigerated compartment spaces having precision temperature control includes the steps of: prioritizing the compartments by identifying at least one priority compartment to be held at a setpoint temperature; and limiting refrigerant flow to all but the priority compartment when there is insufficient cooling capacity to maintain all compartments at their respective setpoint temperatures.

REFERENCES:
patent: 4439998 (1984-04-01), Horvay et al.
patent: 5163301 (1992-11-01), Cahill-O'Brien et al.
patent: 6460358 (2002-10-01), Hebert
patent: 6804972 (2004-10-01), El-Habhab
International Preliminary Report on Patentability mailed Jul. 31, 2008 (5 pgs.).
International Search Report and Written Opinion mailed Aug. 3, 2006 (9 pgs.).

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