Why use sunshade? The main advantage of car shading is to block the sun, so that the light in the action area can not enter the car, to a certain extent, it can reduce the burning inside the car, and prevent leather seats and dashboards from being damaged by ultraviolet rays. Among them, there are many different types of products. Second, in terms of service life, the steel drag chain is generally no less than 10,000 times, which is also a variety of technical advantages that can really be brought about by such a rotation speed. after updating such characteristics, we will be able to constantly grasp such technical characteristics, and then form the key to be more convenient to use in machinery. In order to fully grasp such technical advantages, this is * the main reference. After the continuous improvement of service life, gradually will be in this point of view, or more important, to be able to grasp such a technical advantage, is * the key.
In the internal thermal insulation system, when the greenhouse or indoor temperature drops to the set low temperature limit at night, the thermal insulation quilt is turned off, the heat preservation of the greenhouse is strengthened, the ground radiation heat loss is reduced, the heating energy consumption is reduced, and the operating cost of the greenhouse is greatly reduced; the shade curtain can be opened during the day to make the greenhouse fully daylighting. The working principle is the same as that of internal sunshade, which is made of a lightweight quilt that does not absorb water and weighs between 100 and 150 grams.
Internal thermal insulation system when the greenhouse or indoor temperature drops to the set low temperature limit at night, turn off the thermal insulation quilt, strengthen the heat preservation of the greenhouse, design and construction of the solar greenhouse greenhouse, reduce the ground radiation heat loss, reduce the heating energy consumption, and the design and construction of the ecological restaurant, greatly reduce the operating cost of the greenhouse; in the daytime, the shade curtain can be opened, and the design and construction of the multi-span greenhouse greenhouse can make the greenhouse fully daylighting. The working principle is the same as that of internal sunshade, which is made of a lightweight quilt that does not absorb water and weighs between 100 and 150 grams.
Fifth, tea. Winter tea is in a dormant period, generally low temperature overcast and rain has a limited impact on tea, but if it encounters wind and freezing or extremely low temperature, it will affect tea tree winter and spring tea production in the coming year. According to the weather conditions, take measures to protect against cold and heat preservation according to local conditions. One is to cover and keep warm. Cover the tea cover with rice (miscellaneous) grass, sunshade net and so on before the cold air comes. The second is to build barriers and guard against the wind. The land easily affected by wind freezing, the windproof barrier was established in the windward place by using materials such as sunshade net in advance, which was higher than the 20cm of tea canopy and tilted to the direction of tea tree. The third is to restore the tree situation in time. For the heavily frozen tea garden, due to the appropriate tree system after the beginning of spring, it is better to prune rather than deep pruning, so as to strengthen the management of spring tea fertility.
Taking into account the local climate, the library adopts a ship-shaped assembly line design, which is wide in the east and narrow in the west to prevent excessive heat accumulation in the library. A large area of floor-to-ceiling windows are set up in the east to introduce natural light and plant landscape; there are no windows in the west, and climbing plants are planted on the wall to isolate the sun from exposure; a plane sunshade is set in the south, and an open balcony and sunshade fence are arranged in the north, which are cool and natural. At the same time, considering the local sulfur gas, the architect chose the corrosion-resistant Sequoia fortunei.
Exposed to sunlight during the day, the largest heating area is the film coverage, and the largest heat dissipation at night is also the film coverage. Because the film coverage area is larger, so the thermal insulation effect of the film coverage is very important. Therefore, it is necessary to do a good job in the protection of film coverage. The shading system at the top of the greenhouse is divided into external shading, internal shading and internal heat preservation system, which are controlled by computer. The weather station system on the outside of the shed might as well monitor the wind direction and temperature at any time. The configuration of the greenhouse sunshade system is beneficial to the accumulation of reducing heat in the greenhouse, and the comprehensive temperature of crops under the sunshade is actually lower than that directly reflected by the open sun.