| 摘要 |
A distribution exhaust system for a vertical duct is provided to prevent the generation of reverse flow and noise by making a distribution exhaust pipe opened or closed and prevent the introduction of condensed water. A distribution exhaust pipe(10) is attached to a main exhaust pipe(50) by a flange for exhausting room air into the main exhaust pipe. An induction pipe(20) is fitted into the distribution exhaust pipe for inducing the exhaust air to flow upward, wherein the induction pipe is curved by a proper angle partially to be protruded to the inside of the main exhaust pipe. An opening and closing plate(30) is connected to an outer end of the induction pipe by a hinge(40) to be opened by air pressure in the case of air exhaust.
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