As the automotive industry has grown and lifestyle has changed, the time spent in an automobile has been gradually increasing. Accordingly, thermal comfort for passengers inside the cabin of an automobile is more important than before. Thermal comfort can be affected by several factors, such as temperature, humidity, and air distribution inside the cabin, as well as airflow rate and air velocity from the air vents and air-handling unit (AHU). The aim of this paper is to investigate the impact of changes in the pattern of discharge air from air vents connected with the vent duct and AHU on the thermal comfort in an automobile. The changed patterns of discharge air were of three types: diffuse-mode, focus-mode, and mix-mode. Cool-down performance and auto temperature-control performance experiments were performed to evaluate the thermal comfort of the front and rear passenger seats in the climate control wind tunnel. In addition, a road driving evaluation of the temperature difference between front and rear seats with two passengers was performed. As a result, focus- and diffuse-type air vents can be helpful for improving thermal comfort of passengers and the air stream of the cabin.

随着汽车工业的发展和生活方式的改变，花在汽车上的时间逐渐增加。因此，对于汽车车厢内的乘客而言，热舒适性比以前更重要。热舒适性可能受多个因素的影响，例如机舱内的温度，湿度和空气分布，以及通气孔和空气处理单元（AHU）的气流速率和空气速度。本文的目的是研究与排气管和AHU连接的排气孔的排气方式变化对汽车热舒适性的影响。排气的变化模式分为三种：扩散模式，聚焦模式和混合模式。进行了冷却性能和自动温度控制性能实验，以评估气候控制风洞中前后排乘客座椅的热舒适性。另外，进行了具有两个乘客的前排座椅与后排座椅之间的温差的道路行驶评估。结果，聚焦型和扩散型通风孔可有助于改善乘客的热舒适性和机舱的气流。