| 摘要 |
The invention refers to an improvement in and relating to an air supply valve (1), comprising a shutter housing (2) with an adjustable shutter blade (3) fitted inside which from a first completely closed position is turnable through a predetermined angle to an open position. The shutter blade (3) is on one hand manually turnable from the said open position further through another predetermined angle to a second completely closed position and is on the other automatically adjustable according to the outdoor temperature during turning of the shutter blade (3) from the first closed position to said open position, using a thermostat unit (4) that is fitted to the shutter blade (3). |
