Session: 02-02 Fluid Mechanics and Heat Transfer in Building Applications

Paper Number: 108234

108234 - Automatic Self-Cleaning System for Window Type Air-Conditioning Unit Using Vacuum Pump 

One problem of air-conditioning units is the build-up of dust particles on filters. This results in the restriction of the flow of cold air, decreasing the overall efficiency of the system. Commercially used self-cleaning system for air-conditioning unit uses frost-wash technology which typically operates for 2-3 hours , this method also requires freezing of filters which consumes a large amount of energy and could harm the components inside the unit. This study used the quantitative, experimental type of research in achieving the desired range for the duration of completion in cleaning dust-covered filters, power output, and overall safety of other components inside the air-conditioning unit. This research also aims to be an innovative self-cleaning system which differs from existing commercially available self-cleaning in the market.

The researchers applied sensors that could detect the pressure and temperature of air coming out of the air-conditioning unit. A rotary vacuum pump is also added in the components of the unit. The researchers also designed a chamber for the automatic cleaning of dust particles in the filter which would activate if the desired range of output (wind and temperature) coming out of the air-conditioning unit is not achieved at a certain period. When the desired output is not achieved, the valve under the filter opens and the filter is cleaned using a vacuum nozzle inside the chamber. The dust is collected inside a separate chamber where the drops of water coming from the condenser mixes with the collected dust and is expelled hygienically outside the system. The cleaned filter is then sent back into its original position and with this, the unit would resume operation.

The result of the research significantly decreased the disadvantages of frost wash technology where cleaning the filters became 3-5 minutes, 60% of the power needed decreased, and increased the overall safety of the components. 

Presenting Author: John Patrick Siobal Polytechnic University of the Philippines

Presenting Author Biography: John Patrick Santos Siobal, a 4th year mechanical engineering student in Polytechnic University of the Philippines Sta. Mesa – Manila. Active PWS (Philippine Welding Society) member