Panasonic Holdings Corporation (PHD) announced that its Manufacturing Innovation Division, in collaboration with Panasonic Eco Technology Kanto Co., Ltd. (PETEC Kanto) and Mitsubishi Materials Corporation, has developed an automatic dismantling system for the covers of air conditioner outdoor units, as a part of its circular economy activities. The system includes automatic dismantling equipment that uses robots to dismantle the covers of air conditioner outdoor units, and a dismantling database that stores information required for dismantling.
In April 2001, the Home Appliance Recycling Law was enforced in Japan, with the aim to reduce waste and to promote the efficient use of resources by recovering useful parts and materials from used home appliances, such as air conditioners, TVs, refrigerators/freezers, and washing machines/clothes dryers, from homes and offices. Due to such initiative, a large number of used home appliances has been brought to recycling plants. Today, 3.69 million air conditioners are sent annually to recycling plants where outdoor units are manually dismantled to recover parts, such as heat exchangers, compressors, and control boards, before being shredded and sorted.
To tackle such issues, PHD has developed an automatic dismantling equipment that automatically removes screws and covers from air conditioner outdoor units using AI-based recognition technology. The equipment is also coupled with robot control technology that enables precise positioning control to replicate human manual work.
In cooperation with PETEC Kanto and Mitsubishi Materials, PHD also created a dismantling database that stores data on each model of outdoor air conditioner unit. The data is fed into the dismantling line in order to improve equipment utilization rates and lay the foundation for automating the dismantling process.
The automatic dismantling equipment for the covers of air conditioner outdoor units uses a camera that captures images of the outdoor units. By utilizing AI, the camera accurately detects screws even with dirt or rust on the units and then set the positioning of a robotic arm equipped with a screwdriver to remove the screws. A robotic grasping hand, which mimics human movement, then loosens and removes the cover. These features have enabled partial automation of the dismantling process.
The dismantling database leverages Mitsubishi Material's AI-OCR technology to read the label of each unit to obtain the data necessary for dismantling, such as the number and location of screws on the outdoor unit of the air conditioner, and then accumulates such data in the database. As a result, the outdoor unit models registered in the dismantling database can be dismantled more efficiently, with fewer unnecessary movements of the robot due to misidentification of screws. The more automatic dismantling equipment is used, the number of models stored in the database is expected to increase. This ultimately leads to the further advancement of the dismantling work in general.
After completing a pilot evaluation at PETEC Kanto in fiscal 2022, PHD will expand the range of models covered and improve the productivity of the system. As part of corporate activities for a sustainable society, PHD plans to expand the use of the automatic dismantling system to recycling plants within and outside the Panasonic Group throughout Japan in the future.
