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1.全长式通风屋脊在高温高湿地区,屋顶中部设置全长式通风屋脊,屋脊两侧设挡风板,顶部设防水罩,雨水从任何角度都不能进入舍内,在排风时不致紊乱或受阻。由于屋面坡度大,通风屋脊起到了“烟囱效应”,屋面下被加热的气流由屋脊排出。通风屋脊缝小,又是通长的,不但加速了气流的排出,而且无气流死角,经测试表明,通风屋脊处的对流通风和热压通风的效果都十分明显。当舍外风速为1.5米/秒时,上、中、下层鸡笼笼顶平均风速分别为0.7米/秒、0.7～0.12米/秒、0.5～0.12米/秒。深圳横岗奶牛场牛舍,采用了全长式通风屋脊,收到了比较满意的通风效果。通风屋脊结构见图1。
1. Full-length ventilated ridge In the high-temperature and high-humidity area, a full-length ventilated ridges are arranged in the middle of the roof. Wind shields are arranged on both sides of the roof and a waterproof cover is arranged on the roof. Rainwater can not enter the house from any angle, Disorganized or blocked. Due to the large roof slope, the ventilated roof serves as a “chimney effect” and the heated airflow below the roof is discharged from the roof. Ventilation roof seam small, but also the long, not only accelerated the discharge of air flow, and no air dead angle, the test shows that the ventilated ridge at the convective ventilation and hot air ventilation effect is very obvious. When the wind velocity is 1.5 m / s, the mean wind speed at the upper, middle and lower cages is 0.7 m / s, 0.7 ~ 0.12 m / s and 0.5 ~ 0.12 m / s, respectively. Shenzhen Henggang cow farm, using a full-length roof ventilation, received a more satisfactory ventilation. Ventilation ridge structure shown in Figure 1.