| 摘要 |
PURPOSE:To eliminate the need for the variation from the preset position of a vent damper by engaging and holding the vent damper in a spring mounted on a heater case at the preset position of the turning range in which the bi-level mode state occurs. CONSTITUTION:At the bi-level mode in which both paths connected to an upper blow port 2 and a lower blow port are simultaneously opened, a plate spring 24 provided with an inverse V-shaped protrusion 23 is engaged and mounted on a boss 25 on a heater case 1 so as to engage and hooks with a groove 21 provided at an auxiliary link 14 at the position corresponding to the groove 21. As a result, since in the bi-level mode, a vent damper 8 is held and reinforced actually through the spring force by the engagement between the groove 21 provided at the auxiliary link 14 that is hooked and fixed to one end of a damper shaft 11 and the protrusion 23 provided at the plate spring 24 that is hooked and mounted on the heater case 1, the vent damper can accurately be held even if pressure variation occurs. |
