| 摘要 |
PURPOSE:To obtain a proper amount of waste heat air no matter in which direction the waste heat may be discharged, say right or left, by installing to the upper part of a waste heat discharge port a damper which can be change over an exhaust heat air passage. CONSTITUTION:A bellow-shaped waste heat duct 15 is installed to one of the waste heat discharge ports 10. It is contrived that waste heat may be discharged by way of the waste heat duct 15 by fixing the end of this waste heat duct 15 to a window frame 16. When a diameter lever 13 is pushed down in the direction of A, the left side of a ventilation passage 11 is shut down, waste heat air 18 is discharged only to the left side of the ventilation passage 11, thereby discharging the waste heat outside a window frame 16 by way of the exhaust air discharge port 10 and the exhaust air duct 15. Since there is no excess discharge to the left side of the ventilation passage 11 as it used to be, this construction makes it possible to prevent the loss in the discharge pressure in advance. When the damper lever 13 is pushed in the opposite direction, the waste heat air can be discharged in the opposite direction as well. |
