What glass does the glass greenhouse use?
Glass greenhouse has been popularized all over the world because of environmental protection, natural and scientific planting methods. The first is the glass greenhouse in the Netherlands, and then the domestic agricultural greenhouse is also booming in recent years. Greenhouse from the original film greenhouse to the current glass greenhouse. It is also constantly updating and iterating, and the types of greenhouses are also spread out, including corrugated greenhouses, multi span greenhouses, arched greenhouses, circular greenhouses, etc. Not only the shape of the greenhouse is different, but also the use has developed to different types of use, such as seedling greenhouse, experimental greenhouse, planting greenhouse, exhibition hall greenhouse, picking greenhouse, tourism greenhouse, restaurant greenhouse and so on.
At present, the skeleton profiles of agricultural smart glass greenhouse have been fixed, most of which are Q235B hot-dip galvanized pipes. At present, the greenhouse design focuses more on the different types of glass. There are two places where glass is used in glass greenhouse, one is the side wall glass and the other is the top glass. The side wall glass is mainly used for heat preservation. Secondly, the fruits and vegetables close to the wall get less light than the fruits and vegetables in the central area. When designing the greenhouse, we will consider increasing the light transmittance of the side wall to ensure the growth of fruits and vegetables on the side wall. In the glass specification design of the side wall of the glass greenhouse, the first consideration is the characteristics of thermal insulation and safety. Most of them are hollow laminated glass. The difference is the different types of glass, such as 5mm (ordinary tempered glass) + 6A + 5mm (ordinary tempered glass), 5mm (scattering glass) + 6A + 5mm (ordinary tempered glass). These two designs are the most used designs at present. On the one hand, a layer of PVB glue is added in the middle to ensure the thermal insulation. On the other hand, it can prevent the impact of foreign objects, resulting in the fragmentation of the wall; The glass on the top of the glass greenhouse is the most controversial. The glass that can be used on the top of the greenhouse includes [diffuse glass] [diffuse reflective glass] [antireflective glass] [ultra white tempered glass].
The top of the glass greenhouse is the main channel for light to enter the greenhouse, so the selection of high light transmittance glass can ensure the growth of fruits and vegetables in the greenhouse to the greatest extent. When designing the glass profile of the greenhouse, it is generally designed according to the light transmittance of the glass. According to the light transmittance, it is divided into: antireflective glass > diffuse glass = diffuse glass > ultra white tempered glass; Among them, diffuse scattering glass and diffuse reflection glass are the standard glass profiles of glass greenhouse. The transmittance of ultra white tempered glass is only 90%, and it belongs to direct light. Areas with strong light have no beneficial guarantee for greenhouse planting, and have been gradually eliminated. The transmittance of diffuse glass and diffuse reflective glass can reach 91.5%, thanks to its unique scattering characteristics. It can turn the direct sunlight into scattered light without reducing the light flux, so as to prevent the greenhouse fruit and vegetable plants from being burned by too strong light. The diffuse glass surface has a unique haze embossing, which can ensure that the light entering the greenhouse all day can maintain a balanced point, maintain the stability of greenhouse plant growth, and better manage the growth of fruits and vegetables.
Let's talk about antireflective glass. Antireflective glass is not widely used in glass greenhouses as diffuse glass and ultra white glass, mainly because it has higher light transmittance, resulting in more expensive prices, and is more used in experimental greenhouses and seedling greenhouses. Antireflective glass is also used in some large projects. On the whole, antireflective glass is recommended, but it is determined according to the owner's budget.