| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation system and a ventilation method capable of sufficiently keeping indoor cleanness and preventing leakage of contaminated indoor air of a clean room and the like, as openings can be opened and closed by closing parts regardless of indoor differential pressure.SOLUTION: A control portion is constituted to switch an operation mode between a first operation mode for not driving differential pressure dampers 26, 30 by driving portions 28, 32, and a second operation mode for driving the differential pressure dampers 26, 30 by the driving portions 28, 32, by operating each of operation portions 35, 36, 37, 38. In implementing the second operation mode, the driving portions 28, 32 are respectively controlled to forcibly close openings 16a, 18a by the differential pressure dampers excluding the differential pressure dampers disposed on partitioning walls 16, 18 same as doors 20, 22 corresponding to the operated operation portions 35, 36, 37, 38, among the plurality of differential pressure dampers 26, 30.SELECTED DRAWING: Figure 2 |
