| 摘要 |
<p>PURPOSE:To improve a heat collecting effect from a ventilating wall by installing a box body, where a one-way valve to be rotated by an air current is set in the middle of a meanderingly arranged air flowing passage, on the ventilating wall. CONSTITUTION:An air flowing passage 4 to meander by an outer cover 2 and an inner cover 3 is formed, and a box body hating an air inflow port 5 in the lower part and an air outflow port 6 in an upper part is installed on a ventilating wall A formed on an outer wall or a roof or the like. A one way valve 7 to be rotated by an air current is set in the middle of this air flowing passage 4. This valve 7 opens the air flowing passage 4 when air flows toward the air outflow port 6 from the air inflow port 5, and blocks up the air flowing passage 4 when the air tries to inversely flow. In this way, a rising air current is passed in a ventilating layer B and when a descending air current is generated, this is checked, so that a heat collecting effect from the ventilating layer B is improved.</p> |
