关键词: 暴晒试验；衣帽架；温度过高；太阳高度角

Abstract: Based on the phenomenon that the temperature of coat and cap rack is too high in a vehicle during the vehicle exposure test, the influence of different assembly angles of the rear windshield, different materials of the rear windshield and different fabric materials of the coat and cap rack on the surface temperature of coat and cap rack is compared through the test data, and the related factors that lead to the excessive temperature of coat and cap rack in the test process are determined, and the corresponding solutions are proposed. It provides data reference for the improvement of vehicle design. The results show that during the test, the sun position shifted to the north and the sunlight directly hit the rear windshield, and the sun height angle at noon in low latitude areas is approxi-mately vertical, while the strong sunlight at noon had more severe effects on the rear windshield, coat and cap rack and other components tending to the horizontal angle. The poor light penetration performance of the rear windshield and the rapid heat accumulation and slow heat dissipation of the flannel fabric are the fundamental reasons for the excessively high temperature of the coat and cap rack. In serious cases, the coat and cap rack will have defects such as deformation, bulging, whitening, degumming and delamination, and the abnormal failure of the coat and cap rack may also be caused under the high temperature for a long time. The surface temperature of the coat and cap rack can be effectively reduced by improving the assembly angle of the rear windshield, selecting the rear windshield with high temperature resistance and sunscreen, and changing the fabric material of the coat and cap rack.

Key words: Exposure test; Coat and cap rack; High temperature; Solar altitude angle