internal and external sunshade curtain and top skylight. The

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Application scenarios: motor, power system, seat, dashboard, center console, part of the body, front and rear doors, steering column, air conditioning system, skylight, sunshade, tail door and small parts. Lock the noise or leakage of cars, high-speed trains, aircraft, experimental silos, and other indoor areas, or be used to track drones and flight positions, etc.

The heat preservation work in the greenhouse can be accomplished by using side insulation and top inner insulation curtain (figure 4), as well as internal and external sunshade curtain and top skylight. The heat preservation work can be carried out 2 hours before sunset. Close the top skylight 2 hours before sunset, expand the internal heat preservation, and then gradually expand the internal sunshade and side insulation. All the internal heat preservation, inner sunshade and side heat preservation will be carried out before sunset. If necessary, external shading can also be fully carried out for thermal insulation. When the external solar radiation is less than 300W/m2 (blade stomata closed) and need heat preservation, you can directly turn on internal heat preservation, side heat preservation and internal shading, and close the top skylight at the same time.

There is still a large cold spell after the Beginning of Spring, which causes freezing and chilling injury to eggplant and fruit vegetables in the greenhouse. To this end, it is necessary to continue to do a good job in preventing cold and freezing. At this time, eggplant fruit vegetables have had a large growth, so it is necessary to cover with two layers of film in the greenhouse. Melons are more likely to be frozen than eggplant fruits, in addition to using two-channel film cover, rice straw bundles can be stacked in the skirt position around the greenhouse to enhance resistance to cold air invasion around the greenhouse; melon seedlings, which are still in the seedling raising stage, can be covered with sunshade net, straw curtain or non-woven cloth on the small arch shed at night to enhance heat preservation capacity; in case of strong cold air coming, we must do a good job of anti-freezing and heat preservation measures.

internal and external sunshade curtain and top skylight. The

(2) adjustable shading facilities should be used in ultra-low energy consumption buildings. The heat absorbed by the sun absorbed by the external sunshade surface can be adjusted automatically or manually according to the sun height angle and outdoor weather conditions, and the proportion of the sun absorbed by the external sunshade surface is smaller than that of the inner or middle shade. It is the most suitable shading form for ultra-low energy consumption buildings. The schematic diagram of the adjustable external sunshade and adjustable sunshade of the lifting louver is shown in figure 10.

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