| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling structure that effectively reduces noise due to cooling-air circulation occurring in a case of high-voltage equipment. <P>SOLUTION: High-voltage equipment 10, configured to be mounted to a vehicle, includes: a first cooling flow path 65 for cooling a battery unit 20 installed in a case 60; a second cooling flow path 80 for cooling a high-voltage control equipment unit 40; an intermediate duct 70 connecting the first cooling flow path 65 and the second cooling flow path 80 to each other; and a blower fan 90 for blowing air to them. The intermediate duct 70 has an inlet 71 connected to the first cooling flow path 65, an outlet 72 connected to the second cooling flow path 80, and an inner flow path 73 communicating between the inlet 71 and the outlet 72. The cross-sectional area of the inlet 71 and outlet 72 is set to a dimension smaller than the cross-sectional area of the inner flow path 73, thereby functioning as an expansion-type silencer that can silence ventilation sound of internally circulating cooling air. <P>COPYRIGHT: (C)2012,JPO&INPIT |
