Robust fixed-sequence control method and appliance for exceptional temperature stability

摘要

A method to control a fixed-sequence dual evaporator cooling system including providing a recurring cooling cycle cooling system wherein each recurring cooling cycle comprises first and second cooling cycles for cooling respective first and second interiors, a pump-out cycle for returning coolant to a condenser, and an idle cycle, and providing a processor to establish exceptions to the recurring cooling cycle. A step includes the processor monitoring first and second actual temperatures of the respective first and second interiors, selecting predetermined first and second control temperatures for the respective first and second interiors, and selecting a command input signal to supply to a compressor, the condenser fan, the first and second evaporator fans, and the valve of the cooling system during the recurring cooling cycle based upon the first and second actual temperatures and the predetermined first and second control temperatures to initiate the established exceptions.

主权项

1. A method for fixed-sequence control of a dual evaporator cooling system comprising the steps of:
providing a cooling system having a compressor, a condenser, a condenser fan, first and second evaporator fans, and a valve operating in a recurring fixed-sequence cooling cycle wherein each recurring fixed-sequence cooling cycle comprises a first cooling cycle for cooling a first interior, a second cooling cycle for cooling a second interior, a pump-out cycle for returning a coolant to the condenser, and an idle cycle; providing a processor for regulating the operation of the compressor, the condenser fan, the first and second evaporator fans, and the valve wherein the processor establishes exceptions to the recurring fixed-sequence cooling cycle; monitoring a first actual temperature of the first interior; monitoring a second actual temperature of the second interior; selecting a predetermined first control temperature for the first interior; selecting a predetermined second control temperature for the second interior; and selecting a command input signal to supply to the compressor, the condenser fan, the first and second evaporator fans, and the valve during the recurring fixed-sequence cooling cycle based upon the first and second actual temperatures and the predetermined first and second control temperatures to initiate the established exceptions.