METHOD FOR DEFOGGING AIR DUCT WITH NET LATTICE MULTISTAGE CONSTITUTION

PROBLEM TO BE SOLVED: To reduce a cost of a reduction in a scale by simplifying a building structure adopted for a conventional large-scale facility by taking a method for defogging an air duct from a cold heat source chamber to a load chamber. SOLUTION: The method for defogging an air duct comprises the steps of heat exchanging an air flow introduced from a regression air outlet 6 of a cold heat source chamber 1 via a regression air duct 2 from a load chamber with a cold heat source, then inducing the air flow as high humidity cold air from a cold air outlet 7 to a defogging unit 10 via a mixing cylinder 9, removing fog drip by multistage net lattices 5, and sending it to the load chamber via a cold air supply duct 3. In the case of fault by immediately sending cold air after the heat exchanging, it is introduced via a bypass air duct 4. Bypass air flow charged with load heat is mixed to a mixing cylinder 9 from a bypass air outlet 8. Thus, high humidity cold air flow is lowered at its relative humidity while being raised, at its temperature, and brought into comfortable air conditioning without cold and without stickiness.