抄録
1) The results of discussion on the findings from an experimental studies on the ventilator by other investigators, indicated that the lack of expression of the ventilator characteristics which were used to flow-rate calculation in the wide ranges of the flow-rate. 2) Ventilation characteristic curves should be expressed by the relation of the static pressure of the ventilator neck (P_o), wind velocity at the ventilator (V) and ventilator flow-rate (v_o) but many types were expressed by the relation of the dimentionless figure [numerical formula] and [numerical formula] 3) Measurements were made on the various types of the ventilator. Many types indicated that the neck static pressure increases with increasing flow-rate, but a few excellent types have one peak static pressure and most parts of curves were run in the negative pressure region. 4) Relation between the flow-rate of the ventilator and the static pressure in the stagnant zone of ventilator produced by the local air speed were discribed from the ventilation characteristics curves and the resistance-flow-rate curves. This relation may be play effective role for design of ventilator.
