SNOW PROTECTIVE DEVICE FOR OPENING PART FOR AIR SUPPLY

PURPOSE:To prevent snow from intruding by a method wherein at the intake part for outer air a hood or vessel is installed and at its inside a heat pipe is installed and the exhaust heat from a ventilating air conditioning system is utilized as a heat source to melt snow. CONSTITUTION:To prevent powdery snow from intruding into a building at the intake part for outlet air of a treater a hood 7 or vessel is installed and also at its inside a heat pipe 8 is installed. As the heat source of a heat pipe 8 the waste heat 8b from a ventilating air conditioning system is utilized to melt intruding snow. At the time of the normal operation of a plant, snow is isolated by the hood of the intake part for outer air in snow-fall condition and the hood is also effective to prevent rainwater from intruding.