| 摘要 |
<p>PURPOSE:To prevent rain from entering an enclosure of outdoor equipment and to keep the inside of the enclosure at low humidity to prevent the dewing. CONSTITUTION:A vent hole to adjust the difference in pressure between inside and outside an enclosure 8 is made in the bottom part of the enclosure 8. The opening of the vent hole touching the open air is provided with a waterproof permeable membrane 3 of water resistance and permeability and further an air passage of the vent hole inside the waterproof permeable membrane 3 is filled with silica gel 4 to pass the air flowing in and out of the enclosure 8 through the waterproof permeable membrane 3 and the silica gel 4. As a result, rain is prevented from entering the enclosure 8 by the waterproof permeable membrane 3 and further steam contg. air is passed through the silica gel 4 to adsorb the moisture, allowing the inside of the enclosure 8 to be kept at low humidity to prevent the dewing.</p> |
