International Journal of Scientific Research and Engineering Development

The HVAC Duct Monitoring and Cleaning Robot is designed to enhance the inspection and maintenance of Heating, Ventilation, and Air Conditioning (HVAC) systems by automating duct monitoring and cleaning operations. The robot eliminates the need for manual inspection, reduces health risks, and ensures efficient cleaning and maintenance of air ducts. The system comprises two major units: the Robot Unit and the Controller Unit, both powered by Arduino Nano microcontrollers communicating via the RS-485 protocol. The robot uses dual analog cameras, LED illumination, and four DC geared motors for smooth movement inside narrow duct spaces.Externally, a pneumatic cleaning brush can be connected to the robot for effective dust and debris removal during operation. A pressure pipe is fixed on the robot through the provided metal part on the upper side, which supplies the required air pressure to operate the pneumatic brush efficiently. RS-485 communication ensures reliable long-distance data transfer, making the system suitable for industrial environments where wireless communication is ineffective. The 10-core cable simultaneously carries both power and data, supplied through an SMPS that converts 230 V AC to 12 V DC, ensuring stable performance and uninterrupted operation over up to 30 meters without voltage drop or interference. The proposed design provides a cost-effective, compact, and durable solution for real-time HVAC duct inspection, monitoring, and cleaning applications.