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蔬菜大棚造价时应如何设计通风口

来源:http://brickenden.com/news/115.html    发布时间:2018-05-05    点击:3491

    J9九游会AG 知道对于蔬菜大棚来说,在建造时是需要预留通风口的,以保证蔬菜种植时可以得到适当的调节温度。通常J9九游会AG 在做蔬菜大棚造价时就会估算建造大棚整体所需要的材料及成本,那么在蔬菜大棚造价,在建造时应如何设计通风口才能理好的买配件材料呢,首先先了解设计通风口的注意事项:

  (1)棚(peng)门(men)口(kou)设(she)缓(huan)冲间:蔬菜大(da)棚(peng)建(jian)设(she)的入口(kou)处,也(ye)是一个(ge)较大(da)的放风口(kou)。为保护(hu)好入口(kou)处的作物,防(fang)止冷风吹(chui)入,农户朋友可以在棚(peng)门(men)口(kou)处设(she)置缓(huan)冲间。将一块宽度(du)(du)在4米(mi)左右,长度(du)(du)6-10米(mi)的薄(bo)膜(mo)(mo),将薄(bo)膜(mo)(mo)的一侧固(gu)定(ding)在后墙的立柱上,然后再用钢丝或(huo)尼龙绳从薄(bo)膜(mo)(mo)与棚(peng)道等宽的地方吊起并固(gu)定(ding)好。两侧棚(peng)膜(mo)(mo)封(feng)好即可,形成(cheng)一个(ge)密闭的空间。当进棚(peng)时,只(zhi)要掀起缓(huan)冲间一头的薄(bo)膜(mo)(mo)进入即可。

  (2)机械通(tong)(tong)(tong)(tong)风(feng):对(dui)于蔬菜(cai)大棚建设的(de)机械通(tong)(tong)(tong)(tong)风(feng),选择大功率(lv)的(de)风(feng)机和进排气(qi)双强(qiang)制通(tong)(tong)(tong)(tong)风(feng),都可以(yi)加(jia)(jia)大通(tong)(tong)(tong)(tong)风(feng)量。通(tong)(tong)(tong)(tong)风(feng)面(mian)(mian)积(ji)实(shi)际就是通(tong)(tong)(tong)(tong)风(feng)窗(chuang)的(de)面(mian)(mian)积(ji),面(mian)(mian)积(ji)越(yue)大,通(tong)(tong)(tong)(tong)风(feng)效(xiao)果越(yue)好。但面(mian)(mian)积(ji)大,开窗(chuang)机构的(de)造(zao)价(jia)和运行费也随(sui)之加(jia)(jia)大。另(ling)外,通(tong)(tong)(tong)(tong)风(feng)窗(chuang)口的(de)设置,应尽可能(neng)使风(feng)压通(tong)(tong)(tong)(tong)风(feng)和热压通(tong)(tong)(tong)(tong)风(feng)的(de)气(qi)流方(fang)向(xiang)一致,如使天窗(chuang)排风(feng)方(fang)向(xiang)处于当(dang)地(di)主导风(feng)向(xiang)的(de)下风(feng)方(fang)向(xiang)。

  (3)放风(feng)口下设(she)置缓冲(chong)膜(mo)(mo)(mo):在放风(feng)口下设(she)置缓冲(chong)膜(mo)(mo)(mo),不仅可以防止棚外草帘上的(de)杂草、尘土等进入棚中(zhong),还可以避免放风(feng)时(shi)(shi)冷空(kong)(kong)气(qi)(qi)直接吹到放风(feng)口下的(de)蔬(shu)菜(cai)(cai)上,导致蔬(shu)菜(cai)(cai)果(guo)实表面的(de)温(wen)度(du)及(ji)干(gan)湿度(du)发(fa)生剧烈变(bian)化。安装(zhuang)缓冲(chong)膜(mo)(mo)(mo)后(hou),使进入蔬(shu)菜(cai)(cai)大(da)棚建(jian)设(she)中(zhong)的(de)冷空(kong)(kong)气(qi)(qi)先被缓冲(chong)膜(mo)(mo)(mo)挡到后(hou)墙上,从而延长(zhang)冷空(kong)(kong)气(qi)(qi)吹到蔬(shu)菜(cai)(cai)上的(de)距离,给冷空(kong)(kong)气(qi)(qi)与棚内热空(kong)(kong)气(qi)(qi)一段对(dui)流(liu)的(de)时(shi)(shi)间(jian)。

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