heat supply system of laundry dryer and waste heat recovery method using the same

摘要

The present invention relates to a heat supply system for a laundry dryer and a waste heat recovery method using the same. The heat of the waste heat discharged from the heat supply to the drying room is recovered and returned to the drying room, thereby reducing the fuel of the dryer and It is to shorten the drying time. The present invention for realizing this includes: a hot air supply unit 10 configured at a lower portion of the dryer main body 100 to generate high-temperature heat; An inner housing 25 configured to surround the drying drum 20 to form a hot air guide passage 11 for guiding the flow of the hot air generated from the hot air supply 10; An exhaust duct 31 for guiding the rise of heat generated in the inner housing 25; A moisture removal motor 30 for removing moisture contained in the heat guided through the exhaust duct 31; An exhaust pipe 32 for guiding the external discharge of waste heat that is raised through the hot air guide duct 11 and discharged through the guide pipes 12 and 13; Waste heat recovery means for recovering heat from the waste heat through heat exchange with the exhaust pipe 32; And a recovery pipe 40 for resupplying the hot air recovered by the waste heat recovery means into the drying drum 20.