| 摘要 |
PURPOSE:To prevent high temperature in a henhouse in summer time or during no wind by installing a force air discharge fan at a discharge port which is provided in the roof ridge section of a henhouse and introducing fresh air from many air inlets which is provided in the floor. CONSTITUTION:An air discharge port 3 is provided with a forced air discharge fan 9. Below the ridge section 2a of a roof an air discharge baffle 10 is hung to give uniform air convection flow in a henhouse. For an air inlet port 11 means which can be adjusted automatically in response to the rate of working for its dimension, for instance automatic opening and closing air inlet 12 is installed. Normally fresh air is introduced through the air inlet port 11 which is provided under the eave and the air is discharged from an air discharge port 3a to the outside of the henhouse by natural convection flow. In summer time or during no wind if the inside temperature of the henhouse is high, air inlet ports 14 are opened by winding up a double-cloth curtain 13, and a forced air discharge fan 9 which is installed on an air discharge port 3 provided on the ridge section 2a of the roof is driven. With this arrangement fresh air is introduced into the henhouse through many air inlet slits 15 provided in the floor.
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