| 摘要 |
PURPOSE:To control properly an amount of air of a blower with a simple configuration of a duct-type air conditioner. CONSTITUTION:Under a test operation mode, a degree of opening of a damper 9 is changed through a damper control means 24, remaining dampers 9 are fully closed and at the same time a pressure difference between an outlet port and an inlet port of a concentrated blower device 2 is detected by a pressure difference sensing device 21, and an actual pressure difference is measured by a pressure difference measuring means 26. An amount of air is calculated by an air volume calculating means 25 in reference to a rotational speed and an operating frequency of a blower 5 detected by a rotational speed sensing means 22 and a fan motor operating frequency sensing means 23. Relative relations of each of these values are calculated by an air volume calculating means 27 in reference to the aforesaid information so as to calculate an air passage resistance and stored as control information under a normal operation mode.
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