| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress generation of sounds in a low frequency band which are harsh on the human ear, in regard to noise from a radiator plate of a compressor drive unit which is generated by transmission of driving vibration of a compressor. <P>SOLUTION: The compressor drive unit includes: a printed board 106 mounted with a semiconductor device 105 driving a compressor 102 and a control circuit controlling the driving; a resin case 107 having a structure for storing the printed board 106 and directly mounted to the compressor 102; and a radiator plate 109 mounted to the resin case 107 by a plurality of screws 108 for cooling the semiconductor device. On a surface of the resin case 107 to which the radiator plate 109 is mounted, a projection 114 is installed at an approximately center between mounting positions of the screws adjacent to each other, so that the compressor drive unit can suppress generation of sounds in a low frequency band which are harsh on the human ear. <P>COPYRIGHT: (C)2013,JPO&INPIT |
