Dew condensation prevention device for discharge chute, and particulate feeding device using same

A dew condensation prevention device for a discharge chute provided in a discharge port of a particulate feeder, the device comprising:

• a tip end portion of the discharge chute, the tip end portion having a duplex configuration including inverted truncated cone-shaped internal and external chutes;
• a space defined between an outer surface of the internal chute and an inner surface of the external chute;
• a first air discharge port communicating with the space and disposed between respective lower ends of the internal and external chutes;
• a cylindrical portion having an air reservoir in an interior thereof and configured to surround an outer peripheral surface of the external chute;
• a second air discharge port for communicating with the air reservoir, the second air discharge port being disposed between an inner peripheral edge of a lower surface of the cylindrical portion and the outer peripheral surface of the external chute and disposed at a higher position than that of the lower end of the external chute;
• and
• an external chute air input pipe and a cylindrical portion air input pipe for introducing dry air into the space and the air reservoir, respectively,
• wherein the external chute air input pipe and the cylindrical portion air input pipe are connected respectively to the outer peripheral surface of the external chute and the outer peripheral surface of the cylindrical portion.