| 摘要 |
PURPOSE:To prevent the leakage trouble of an electric parts due to dewing by providing a ventilating path, which permits the ventilation of internal and external air into a housing to house the electric parts, on the contrary, prevents the passing of scattering wash water and rainwater. CONSTITUTION:At a housing 4 to house electric parts 9, 10 and 16 of a supersonic detector S to detect the relative position and height of an automobile in an automobile washing device to automatically wash the automobile, a ventilating path 19 to permit the ventilation of the internal and external air of the housing, on the contrary, can prevent the passing of the scattering washing water at the time of operating the automobile washing device or the rainwater. Thus, while the enter of the washing water or the rainwater into the housing 4 is suppressed, the internal and external air of the housing 4 can be freely ventilated, and even when an external temperature sharply changes, the danger of the dewing in the housing 4 does not exist, and the leakage trouble of the electric part due to the dewing can be prevented beforehand. |
