Arduino Based Portable Indoor Air Conditioner with Cooling, Sterilisation and Humidifier for Air Quality and Room Comfort

Abstract

In an indoor environment, air quality and comfort rely on purification, humidification, sterilisation, and cooling. This paper presents the development of an all-in-one portable air conditioner system that monitors and controls the temperature, and humidity as well as provides air filtration and sterilisation. An Arduino microcontroller functions as the main controller, which receives inputs from the temperature, humidity, and dust sensors. In response to the received input signals, the appropriate control instructions are sent to heating or cooling elements and humidity relay actuators. Filtration was provided by a passive HEPA filter and a UV lamp. Test results show that the dust level was reduced by 27% within a half-day timeframe. For cooling, the Peltier module could reduce the temperature of a small room by up to 50 C. With the water sprayer, the humidity was able to be increased from 35% to 57% in 240 minutes. Based on the findings, it can be concluded that the overall design is effective for a small room in a controlled environment. For a larger scale application, it is suggested that the capacity of the design to be increased proportionally.