| 摘要 |
PROBLEM TO BE SOLVED: To prevent leakage of cold air by reducing in size a damper mechanism. SOLUTION: A damper mechanism 13 is provided in a duct 12. The mechanism 13 has a body frame 14 having a damper port 14f, a damper plate 15, a damper motor 19 and a gear train 20. A rotary shaft 15a of the plate 15 is rotated by the motor 19 and the train 20. The plate 15 controls to drive the motor 19 to operate to block the duct 12 for a predetermined period (30min) during a term to block the duct 12. |
