The ventilation and cooling equipment of chicken farms mainly relies on animal husbandry fans. The ventilation of fans depends on the models and manufacturers. Many farm owners are worried about the configuration of fans and curtains in their chicken farms. Is it reasonable? How do we configure livestock fans in actual use? There are actually three control systems for ventilation in the house. One is a small ventilation system, the other is a mixed ventilation system, and the third is a longitudinal ventilation system. Since there are three ventilation systems, it is necessary to know how to configure the livestock fan under different ventilation systems.

First, less ventilation: used in the brooding period in winter and other periods, calculate the number of exhaust fans in the first level of smaller ventilation = the number of exhaust fans in the first level of ventilation = the actual exhaust of a single exhaust fan The amount of exhaust air that is pressed by the work.

1. A gas exchange system with a low oxygen concentration in the house that maintains 19.2%. The exhaust fan required to exchange the air in the house is exchanged once every 8 minutes, and the exhaust fan is operated for 2 minutes in a 10-minute ventilation cycle. (The air circulation is less than 1.5 minutes, and the exhaust fan working time is less than 1.5 minutes. It will not be effective.

2. The large standard ventilation of the small ventilation system is to increase the livestock fan and make the house. The air inside is exchanged every 5 minutes or continuously.

The airflow of the first level of less ventilation: the exhaust volume = the total volume of the house ÷ 8 the smaller ventilated level 2 row Air volume: exhaust air volume = total house volume ÷ 5 example: chicken house length 100m, width 12m, 檐 height 3.8m, ridge height 1.5m, the house volume is 5640m?, if the 36-inch fan exhaust air volume is 280 cubic meters / minute. Calculate the air volume of the first level of small ventilation: 5640m? ÷ 8 minutes = 705m? / minute, the number of fans required 2.5; calculate the air volume of the second level of small ventilation: 5640m? ÷ 5 Minutes = 1488m?/min, the number of fans required is 4.1. Therefore, the house needs to install five 36-inch animal husbandry fans, evenly distributed on the side of the house.

Second, mixed ventilation: when the side wall When the exhaust fan is still unable to reach the needs of the flock, it is necessary to open the longitudinally ventilated animal husbandry fan, generally spring and autumn. (5-day average temperature is between 10 and 22 °C) This ventilation mode is used.

Mixed ventilation is a vertical fan, we do not need to calculate the number of livestock fans, the number of general opening It’s about half.