In summer, the indoor air conditioning load mainly comes from the solar radiation heat of the windows entering the room, so taking effective shading measures is an effective way to reduce solar radiation. The calculation of sunshade is very important in the calculation of load and energy saving of air-conditioned buildings. Building shading methods can be divided into three categories: external shading, characteristic glass and internal shading. External shading can be constructed by sexual building shading, such as sunshade panels, sunshade panels, eaves, etc., or it can be movable and adjustable, such as louvers, movable baffles, rolling curtains and so on. These sunshade structures are commonly used in traditional buildings. Characteristic glass is the use of modern glass coating technology, so that the window glass can choose the incident sunlight, play as much as possible to introduce visible light, while reducing infrared light into the room.
In terms of temperature management, the early growth stage of spring cauliflower cultivation was in the low temperature season, and the growth was small, while the plant size of broccoli was closely related to the flower head yield, and the temperature increased rapidly in the later growth stage, which was disadvantageous to the flower bud differentiation and flower ball formation of broccoli. Therefore, in the field management, it is required to do a good job of heat preservation in the early stage of growth to prevent freezing. Those cultivated in greenhouse should be closed in time to keep warm, those cultivated in open field should be trenched and drained as soon as possible to prevent freezing, and the remedial method of covering the floating surface of sunshade net should be adopted in case of sudden frost or freezing weather. In the later stage of growth, after the temperature rises in April, the protected cultivation should do a good job of ventilation and cooling in time, and the flower heads should be harvested in time after maturity.
2. It is necessary to make full use of all kinds of facilities to create favorable conditions for crop growth and anti-freezing. For example, the greenhouse should do a good job of heat preservation and temperature increase in the greenhouse to ensure immortal seedlings; it is necessary to actively prepare sufficient materials such as film, sunshade net, rice straw and so on. In case of freezing weather, do a good job in covering, especially cash crop seedlings; and remove the mulch in time after snow and ice to reduce freezing damage, prevent snow from freezing and crush the greenhouse, and reduce losses.
Introduction to the maintenance of blinds in daily life, it is recommended to use special dedusting equipment to wipe off dust with a semi-damp sponge or a soft dishcloth, and the gentle and smooth operation of wiping moisture with a dry cloth can prolong the service life of the blinds, and regularly use candles to smear back and forth on the rope several times, which can make your lifting operation easier. Rain-proof shutters are used in computer rooms or other public places that need ventilation and rain protection, heat insulation and air flow regulation, and are composed of rain-proof blades with water collecting ditches, side frames with drip frames and streamlined regulating blades. It not only has the advantages of single-layer rain-proof shutters, but also the staff can adjust the opening of rain-proof shutters according to the indoor temperature or ventilation demand. Single-layer rain shutters are divided into vertical and horizontal, mainly used for large shopping malls, exhibition halls, garages and other places of the facade and top sunshade, also has the role of anti-theft insurance.
“the car has been driving for a long time. I always thought that the sunshade on the front of the car could only be in front. It turned out that the bayonet could be turned into a side block after the bayonet was pulled open. However, most people will put towels and invoices here. ”
