초록 ▼

An enhanced controller for an air conditioning system incorporating mechanical cooling equipment and an economizer, the enhanced controller including circuits for producing signals indicative of commanded changes in temperature of air admitted into the air conditioned space and of a non-temperature

An enhanced controller for an air conditioning system incorporating mechanical cooling equipment and an economizer, the enhanced controller including circuits for producing signals indicative of commanded changes in temperature of air admitted into the air conditioned space and of a non-temperature parameter, such as carbon dioxide concentration, of air within the space. The signals are supplied to a logic circuit which produces a ventilation damper control signal based on which of the temperature and non-temperature parameters requires greater change. Freeze protection, and maximum and minimum damper position circuits override the basic damper control signal to avoid excessively low space temperatures and to provide air exchange limits.

대표청구항 ▼

[ What is claimed is:] [1.] A controller for controlling mechanical cooling equipment and ventilating equipment for conditioning air within an enclosed space in response to signals indicative of air temperature and of at least one non-temperature air parameter respectively, the ventilating equipment

[ What is claimed is:] [1.] A controller for controlling mechanical cooling equipment and ventilating equipment for conditioning air within an enclosed space in response to signals indicative of air temperature and of at least one non-temperature air parameter respectively, the ventilating equipment being responsive to a ventilating equipment control signal to exchange a variable proportion of air within the space for air outside the space, the controller comprising:economizer control apparatus operable in response to a space thermostat signal indicating that a temperature in the enclosed space is above a setpoint temperature, and an enthalpy sensor signal indicating that air outside the enclosed space is suitable for providing cooling within the space, to produce mechanical cooling equipment control signals, said economizer control apparatus further being operable to produce an economizer control signal;air temperature apparatus connected to receive the economizer control signal and operable, at least partially dependent on the economizer control signal, to produce an air temperature control signal representative of a commanded temperature change of air entering the space;air quality apparatus operable to produce an air quality control signal representative of a commanded change in a non-temperature parameter of air within the space; anda signal processor connected to receive the air temperature and air quality control signals, and operable to produce a ventilating equipment control signal based on the one of the air temperature control signal, and air quality control signal which corresponds to the greater exchange of air within the space for air outside the space, the ventilating equipment control signal being suitable for causing ventilating equipment receiving the ventilating equipment control signal to increase the proportion of air within the enclosed space exchanged for air outside the space at least in part in response to the space thermostat and enthalpy sensor signals.