In order to increase the area of lighting and ventilation or show the character characteristics of modern buildings, the area of doors and windows of buildings is getting larger and larger, and the curtain wall of buildings with full glass, so that the heat loss of doors and windows accounts for more than 40% of the total heat loss of buildings, energy conservation of doors and windows is the key to building energy conservation. Doors and windows are not only sensitive parts of energy gains and losses, but also related to lighting, ventilation, sound insulation and facade modeling. This puts forward higher requirements for the energy saving of doors and windows. Its energy saving treatment is mainly to improve the thermal insulation performance of materials and the sealing performance of doors and windows.
In the development of Windows, balcony windows develop to the floor push-pull type, and develop new medium suspension and upper suspension windows; Toilet mainly develops ventilation windows, which have two functions of preventing sight and ventilation; kitchen windows will develop towards long windows, which will be located between kitchen wall cupboard and the operating table; Door and window shading technology is suitable for wide promotion in hot summer and warm winter areas.
The materials used for windows are wooden window & rarr; Aluminium windows & rarr; Plastic windows & rarr; Aluminum-plastic composite Windows & rarr; Aluminum and wooden composite window & rarr; Development trend of FRP doors and windows.
From the perspective of door and window materials, there are some energy-saving products with high technical content, such as aluminum alloy heat-breaking profiles, aluminum-wood composite profiles, steel-plastic integral extrusion profiles and UPVC plastic profiles, among which UPVC plastic profiles are widely used, the raw material it uses is polymer material-hard polyvinyl chloride.
In order to solve the problem of excessive energy loss caused by large-area glass, ordinary glass is processed into insulating glass, coated glass, high-strength LOW-E fireproof glass, the glass containing metal layer and the most special smart glass are plated by Magnetron vacuum sputtering radiation method.
(1) high-performance sealing technology for all surrounding building doors and windows and building curtain walls. Reduce the heat loss of air penetration and improve the main physical properties such as air tightness, watertightness, sound insulation, heat insulation, etc.
(2) high-performance hollow glass and economical double glass series product technology and product performance should have a big breakthrough. Focus on solving the condensation temperature, impact resistance and installation technology of heat reflection and low radiation hollow glass, high performance safety hollow glass and economical double glass, so as to realize the scientific combination of heat insulation and effective utilization of solar energy.
(3) heat breaking technology for special aluminum alloy profiles and special profiles for galvanized color plates. Focus on solving the problems of localization of heat-breaking materials, fire-resistant and harmful choking gas safety, reducing material costs and expanding the promotion area.
(4) Development, popularization and application technology of composite doors and windows special materials. Focus on developing special materials for aluminum-plastic, steel-plastic and wood-plastic composite doors and windows, composite supporting accessories and sealing materials.
(5) thermal insulation technology of doors, windows and curtain wall. We should take building energy-saving technology as the driving force to carry out technological transformation and innovation on the window structure, opening form and window structure of residential buildings in our country. Change the single sliding window type and develop flat, especially composite in-swinging casement window and multi-function windows. Improve the ventilation function and safety performance of high-density sealed windows, and develop high-efficiency energy-saving luxury aluminium windows and luxury multi-functional products.
(6) complete set of technologies for doors, windows and curtain walls. Develop multi-functional series and complete sets of products with regional characteristics; Make great breakthroughs in improving the quality, variety and performance of supporting accessories; Establish market advantages of famous brand products and boutique products; Develop diversification, industrial production system of multi-level energy-saving products.
(7) solar energy development and utilization technology. Building doors and windows and building curtain walls should change the technical concept of passive thermal insulation and single energy saving. We should combine energy conservation with rational utilization of solar energy, underground hot (water) energy and wind energy to develop energy conservation and utilization (using solar energy, cold energy, wind energy and geothermal energy) combined doors and windows and curtain wall products.
(8) improve the installation technology of doors, windows and curtain walls. Improve the integrated energy-saving technology level of doors and windows, curtain wall structure and enclosure structure, and improve the overall energy-saving effect of the wall. Focus on solving the anchoring and filling technology of doors and windows, curtain wall and using solar energy and aerodynamic energy saving technology.
