VENTILATOR

To provide a ventilator capable of detecting a contamination amount of indoor air regardless of a contamination amount of outdoor air, and capable of appropriately adjusting a ventilation amount according to the contamination amount of indoor air.SOLUTION: A ventilator according to the present invention comprises: an indoor air supply unit with an indoor air supply port 15 for blowing out air supplied from the outside into an indoor space; an indoor sensor 31 that detects a contamination amount of air of the indoor space; air supply amount change means that changes an air volume blown out from the indoor air supply port 15 according to a detection result of the indoor sensor 31; and windshield means (an air guide plate 16) that blocks the wind blown out from the indoor air supply port 15 and directly advancing toward the indoor sensor 31.SELECTED DRAWING: Figure 2 【課題】屋内空気の汚染量を屋外空気の汚染量に左右されることなく検出でき、屋内空気の汚染量に応じた換気量の調整を適切に行うことが可能である換気装置を提供する。【解決手段】この発明に係る換気装置は、屋外から供給された空気を屋内空間に吹き出すための屋内給気口１５が形成された屋内給気部と、屋内空間の空気の汚染量を検出する屋内センサ３１と、屋内センサ３１の検出結果に応じて屋内給気口１５から吹き出す風量を変化させる給気量変更手段と、屋内給気口１５から吹き出して直接に屋内センサ３１に向かう風を遮る遮風手段（導風板１６）と、を備える。【選択図】図２