| 摘要 |
PURPOSE:To ventilate the inside of a vehicle with the use of solar cells upon parking, by attaching the solar cells to the exterior of the vehicle such that the number of solar cells in series connection is changed in the intensity of the sun light, and electrical power from the solar cells is fed to a ventilating means. CONSTITUTION:Amorphous solar cells 21A through 21F of three cell series connection type, are connected in series for every three to obtain solar cell groups 21A-C, 21D-F which are connected to a motor 11 through a twin-type electromagnetic relay RL1. Further, an amorphous solar cell 22 of seven cell series connection type is connected to a coil in the twin-type electromagnet relay RL1 which is therefore energized by the output of the solar cell 22. This relay RL1 is energized when the voltage applied to the coil exceeds 3.5V. That is, when the intensity of the sun light is about 100W/m<2>, that is, it is low, the relay FL1 is not energized so that the solar cell groups are connected in parallel, and therefore no air is fed, but when it is 200W/m<2>, they are connected in series to feed air. With this arrangement, the solar cell may be effectively used to ventilate the inside of the vehicle during parking. |
