초록 ▼

A microcomputer system and method for controlling the capacity of a refrigeration system are disclosed. The microcomputer system receives electrical input signals indicative of operator selected settings and refrigeration system operating parameters. The microcomputer system processes these input si

A microcomputer system and method for controlling the capacity of a refrigeration system are disclosed. The microcomputer system receives electrical input signals indicative of operator selected settings and refrigeration system operating parameters. The microcomputer system processes these input signals to generate a control signal which is a step function of the temperature difference between a desired set point temperature and the sensed temperature of a heat transfer fluid cooled by operation of the refrigeration system. The width of each step of the step function is directly proportional to a selected capacity control response factor. By selecting different capacity control response factors, capacity control of the refrigeration system is tailored to meet specific job requirements of a particular job application for the refrigeration system.

대표청구항 ▼

A method of operating a refrigeration system having a microcomputer system for controlling the capacity of the refrigeration system, which comprises the steps of: generating a first signal indicative of a selected capacity control response factor; generating a second signal indicative of a selected

A method of operating a refrigeration system having a microcomputer system for controlling the capacity of the refrigeration system, which comprises the steps of: generating a first signal indicative of a selected capacity control response factor; generating a second signal indicative of a selected set point temperature for a heat transfer fluid cooled by operation of the refrigeration system; sensing the temperature of the heat transfer fluid cooled by operation of the refrigeration system and generating a third signal indicative of this sensed temperature; generating a fourth signal indicative of an upper limit of a selected temperature deadband relative to the selected set point temperature; processing the first, second, third, and fourth signals to determine the relative temperature difference between the sensed temperature and the selected set point temperature and, when the sensed temperature is determined to be greater than the selected set point temperature by an amount which exceeds the upper limit of the selected temperature deadband, to generate a control signal which is a step function of the determined relative temperature difference between the sensed temperature and the selected set point temperature, with the width of each step being directly proportional to the selected capacity control response factor; and adjusting the capacity of the refrigeration system in response to the generated control signal.