Abstract
For the purpose of finding out methods of designing shower heads, the effects on optimum flow rate and comfort condition were examined by using shower heads whose size and angle of holes were systematically changed. To grasp physical characteristics of each shower head, the experiments concerning the distribution of the force and the volume of water were conducted. Optimum flow rate and comfort condition data were gained by the subjective experiment, and the relations between those and the force were explained. And also, optimum flow rate and flow rate when actually taking a bath were experimented by using commercially available shower heads. As a result, optimum flow rate was strongly effected by total force when the subject was hit by shower. Optimum flow rate can be predicted by total holes area, which is determined by hole size, and hardly effected by hole angle. The result of experiment using commercially available shower heads showed that optimum flow rate is related to total holes area, and the volume of hot water by each action is in proportion to optimum flow rate.
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