| 摘要 |
PURPOSE:To optimize the ventilation without any device for acutuating the exhaust fan by the temperature in the farm through proper regulation of the volume and speed of air admitted by means of a senser of the temperature in the farm and a opening controller of the air admission plate. CONSTITUTION:A temperature difference sensor 2 for detecting the difference between set and actual temperature in windowless breeding farm 1. According to the command of the senser 2, a motor 4 is driven with a controller 3 to adjust the opening of an air admission plate 6 through a cable whereby the volume and speed of air admitted are regulated properly. The numeral 7 indicates a light shielding plate and 8 an exhaust fan. In addition, the air admission plate is opened upward or downward by detecting the difference between the temperature in the farm and that of the outdoor air with outdoor temperature sensors 9 and 10 whereby the direction of air admission is regulated properly. By so doing, there is less adverse effect of natural air as compared with the control of the exhaust fan by the temperature in the farm. |
