| 摘要 |
PURPOSE:To obtain a proper flow rate by reducing the revolving number of a fan by one rank, by a method wherein a static pressure regulating device, capable of regulating the flow rate of air and a static pressure outside of the title unit, is attached to an air conditioning machine. CONSTITUTION:A static pressure regulating device consists of a terminal board 1-1, protection fuses 1-2, flow rate selecting relay coils with contacts 1-3, a motor for fan 1-4, a static pressure regulating unit 1-5 and the like while the switching of the flow rate of a fan can be selected by flow rate changeover switches 1-3 through selecting one of taps Hi, Me, Lo. When the initial resistance of a medium performance filter is small or the resistance of a duct is small and the flow rate becomes too large, the static pressure regulating unit 1-5 is switched forcibly to reduce taps Hi, Me by one rank and select the taps Me, Lo. Excessive flow rate may be prevented when the resistance of the duct is small and, accordingly, a trouble such as large noise, water splash, the abnormality of refrigerating cycle or the like may be prevented. |
