| 摘要 |
<P>PROBLEM TO BE SOLVED: To make only a necessary blower function, without causing problems such as generation of noise, increase in load with respect to a vehicular engine, and deterioration in fuel economy. <P>SOLUTION: A first on-off valve 2 is disposed to a suction pipe 112 of one blower 110 out of two blowers 110, 111 connected in parallel with respect to a suction pipe 109. A circulation pipe 3 is installed to connect a suction pipe 112a between a suction port of the blower 110 and the first on-off valve 2, with an exhaust pipe 115 of the blower 110, and is provided with a second on-off valve 4. When the first on-off valve 2 is closed and the second on-off valve 4 is opened, the suction port 110a of the blower 110 is shut off from the suction pipe 109 to make only the blower 111 function, and air pressure-fed by the blower 110 is circulated through a blower-side exhaust pipe 125, a muffler 114, the circulation pipe 3, the suction pipe 112a, and an air path inside the blower 110, to operate the blower 110 in a no-load state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
