Design of a control system for a fresh air conditioner

With the improvement of living quality, people demand higher and higher air quality in buildings. That leads to performance improving for air-conditioner control systems. This paper presented a control system for a fresh air conditioner. Firstly, it designed a controller for one type of fresh air conditioners. It was developed with sensor module, display module and unit control module by using very cheap microcontroller STC89C51. The fresh air valve will be controlled via judging the concentration of carbon dioxide. Except for the concentration of carbon dioxide, the sensor module will collect temperature and humidity data. Whole hardware design procedure is elaborated in this paper. Secondly, a client software developed to control a fresh air conditioner with mobile terminators, such as smart phone, tablet computer, is discussed. Through the control system developed in this paper, a fresh air conditioner can monitor and control indoor air quality better.