日光温室有哪些基本类型?各类型日光温室的尺寸如何?

2025-03-29 18:06:40
推荐回答(1个)
回答1:

本世纪30年代,我国东北鞍山地区已有日光温室,并在冬季生产韭菜等耐寒叶菜。初始型的日光温室,低矮、空间小,前屋面角度大而短,后屋面长,后墙低矮。这种温室采光角度大,保温性好,缺点是采光面短,长后坡下光照弱,特别是春秋两季后坡遮荫较多。此外土地利用率低,在室内人难以行走,不便操作。半个多世纪以来,特别自80年代中期至今,人们在生产实践和科学研究中不断摸索、改进,主要是提高中脊,增高后墙,增大后屋面仰角,缩短后屋面投影,改进采光屋面形状,扩大空间,减少立柱,采用异质复合墙体,使用轻质保温隔热材料,形成了几种具有代表性的、性能好、实用性强的温室类型。

(1)矮后墙长后屋面拱型日光温室

该温室后墙高0.6~1.0米,后屋面长2.5~3.5米,投影长1.8~2.2米,跨度(室内后墙底脚至采光屋面底脚距离)5.0~6.0米,中高(温室屋脊至地面垂直距离)2.2~2.4米,采光屋面为拱圆形,中腰(采光屋面中央部位)坡度30°左右(图2a)。

这种温室后墙矮、后屋面仰角大,主要采光面角度在30°左右,冬季室内光照充足;后屋面又长又厚,后墙外侧培有干土,保温性能好。但采光面短,后屋面投影过长,在春秋季太阳高度角增大时,室内阴影面积大;此外空间小,室内气温变化大,土地利用率低,不便人工劳作。

(2)高后墙短后屋面拱型日光温室

该温室后墙高1.5~1.8米,后屋面长1.5~1.7米,仰角30°左右,投影长1.2~1.5米,跨度6.0米,中高2.4~2.8米,前屋面为拱圆形,中腰坡度在30°左右(图2b)。

这种温室与矮后墙长后屋面拱圆型日光温室类似,只是后屋面及其投影缩短。由于后屋面缩短,增大了采光面积,不仅冬季光照充足,春、秋季室内阴影面积也相应缩小,但冬季的保温性能不如后屋面长的。由于增大了跨度,提高了中高,空间增大,土地利用率提高。

(3)鞍Ⅱ型日光温室

该温室为桁架式拱架,无立柱温室。跨度6.0米,中高2.7~2.8米,后墙高1.8米,后屋面长1.7~1.8米,仰角35°左右,投影长1.8米。拱架由钢筋或钢管做成桁架式,受力强,室内无柱,采光性、保温性均好,土地利用率高,便于操作。但造价稍高。

(4)一坡一立式日光温室

该温室后墙高2.0米,后屋面长1.0米,跨度7.0米左右,中高3.0米。其特点是前屋面有两折式,一坡一立,立窗角度为60°左右,高0.65~0.8米,坡面角度21°~23°。

该温室空间大,土地利用率高,保温性好,但透光性不如拱圆形温室,前坡低矮不便操作,棚膜固定方法不合理,易使薄膜破损。

(5)高大型温室

这是近年来出现的一种温室类型,其跨度为8.0米,中高3.5米,后墙高2.6米,后屋面投影1.0~1.2米。这种温室空间大,适宜于果树设施栽培。

图2 日光温室主要类型(单位:米)

a.矮后墙、长后屋面拱型温室 b.高后墙短后屋面拱型温室 c.鞍Ⅱ型温室 d.一坡一立式温室 e.高大型温室

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