| 摘要 |
PURPOSE:To impart a natural air-supplying function to an air-conditioning system, by a method wherein vanes of a blower can be tilted to be parallel to the direction of an air flow, and air can be supplied into a room through an air- feeding duct by changing over the intake of the outside air to the downstream side of a heat-exchanging coil. CONSTITUTION:An outside-air intake damper 16 and a room air circulating damper 18 are closed, an outside-air intake damper 14 is opened, the operation of the blower 12 is stopped, and the vanes of the blower 12 are directed to be parallel to the direction of the air flow by vane-driving part 20. Room air sucked in through a suction port 29 and an exhaust duct 27 is discharged by an exhausting blower 22 and a variable-vane blower 23. As a result, natural air supply can be performed. The damper 14 is closed, the dampers 16, 18 are opened, the vane angle of the blower is set at a preset angle, and air is blown off through the heat-exchanging coil 8 and a blow-off port 28 to heat or cool. Accordingly, natural air supply can be performed. |
