| 摘要 |
PURPOSE:To improve a control feeling so easily, by constituting a damper so as to be changed over in a way of making feed pressure to a diaphragm type actuator variable upon opening or closing a valve member for heat and vent use by a control button, in case of a damper driving device for car air-conditioning. CONSTITUTION:When a heater blowoff control button is pressed, a valve member 9a is opened, making the hydraulic pressure of a branch pipe 81 turn to atmospheric pressure, and an actuator 7 makes a damper 5 turn round to a full line position. With this method, an air-conditioning blow is fully flowing into a flow passage 1b and fed out of a heater blowoff port. When a vent button is pressed, a valve member 9b is opened, making the hydraulic pressure of the branch pipe line 81 turn to suction pressure whereby the damper 5 is made turn round to a broken line position. Accordingly, the air-conditioning blow flows into a line 1a and then fed to a ventilation blowoff port. With this constitution, improvements in a control feeling are promoted ever so better in a simple structure. |
