UNSPRINKLED SNOW MELTING METHOD BY UNDERGROUND BOILER HEATING

摘要

PURPOSE:To quickly melt snow by mixing a nonfreezing solution warmed by an underground boiler and a cooled nonfreezing solution in a heat radiating pipe buried in the road surface with a mixing three-way valve, and feeding the mixture to the heat radiating pipe when snow falls. CONSTITUTION:Operations and stops of an underground boiler 2 arranged in a heat insulating box 1 and a circulating pump 4 are repeated by the signal issued by a temperature detecting device 15 in a tank 3, and a nonfreezing solution in the tank 3 is maintained at 60 deg.C or below. When snow falls or the road surface may be probably frozen, the operation of a circulating pump 5 is started by the signal issued by a snowfall detector 12, and the nonfreezing solution in the tank 3 is fed to a heat radiating pipe 7 buried in the road surface 14. The nonfreezing solution at 15-20 deg.C is obtained by a short circuit pipe 10, e mixing three-way valve 11 and a temperature detecting device 9 provided between a feed main pipe 6 and a return main pipe 8. The nonfreezing solution flows in the heat radiating pipe 7, the heat of the nonfreezing solution is transmitted and stored in the road surface 14 from the heat radiating pipe 7, and the heat is radiated from the road surface 14 to melt snow.