| 摘要 |
PURPOSE:To make the temperature difference between upper and lower blow-out airs variable, by providing such an arrangement that a subdoor is separated from a main door and is fully opened only upon fully cooling operation, and the subdoor is limited in its closing direction but is not limited in its opening direction upon operation other than fully cooling operation. CONSTITUTION:Upon fully cooling operation in which a main door 13 fully closes a heat core 7 but fully opens a cooling air passage A, a subdoor 14 is controlled to be moved to a position where the cooling air passage A is fully opened, so that cooling air is directly blown out from the cooling air passage. Meanwhile upon a heater mode other than the fully cooling operation, the subdoor 14 is controlled by a vacuum actuator 16, independently from the main door 13 so that the main door 13 is positionally controlled in the direction in which a heating air passage B is opened, while the subdoor 14 is controlled in the direction in which the cooling air passage is closed. In this condition when the actuator 16 is turned off, the subdoor 14 is freely opened and closed by wind pressure. Accordingly, the doors 13, 14 are independently opened and closed to make it possible to change the temperature difference between the upper and lower blow-out airs. |
