Hvað eru the aðferðir til ná stöðugur hitastig í stál rammi gróðurhús?
The stál uppbygging gróðurhús hefur kosti af einföldum uppbyggingu% 2c lág bygging kostnaður% 2c og er hentugur gróðursetningu stór-mælikvarði ræktun. At present, galvanisered stál beinagrind gróðurhús eru að mestu notuð, sem eru auðvelt að setja og viðhalda, do not need top stoðir, og hafa a lang þjónustu líf.
Við núverandi, sól gróðurhús í grundvallaratriðum notkun landbúnaður plast varp filma til hlíf þak, notkun hita einangrun teppi (teppi, gras hlífar) utan the plast varpa filmu, geymsla ljós in morgun eftir sólarupprás, og notkun a hlíf til kæling niður við nótt. Hins vegar, the þykkt af plast shed film is limited, og the temperature preservation is limited.
Although the insulation of the steel frame greenhouse has a certain thickness and density, its insulation performance has been greatly improved, but it can no longer meet the ideal requirements of solar greenhouse insulation in winter, especially after rain and snow, the insulation is humid, and the insulation performance is almost lost. . Cover the insulation layer with a complete layer of polyethylene longevity shed film. From the back slope of the greenhouse to the front drainage channel of the greenhouse, the slope wall at the back is aggravated and compacted with masonry (stone) for about 2 meters at regular intervals, and the front drainage The port can only be pressurized at both ends. After sunrise in the morning, roll up the insulation, and release heat after sunset to form a multi-layer insulation form of double-layer plastic shed film clip insulation, which prevents the direct intrusion of cold air at night and improves the insulation effect. According to practice, the room temperature in the greenhouse can be increased by 4 degree and 6 degree respectively.
The steel frame shed is lit and heated. If the crops cultivated in the greenhouse are affected by strong cold currents and the indoor nighttime temperature is lower than 6 degree , they should be ignited and heated.
