The promotion of window and door bengkaichuang time is increasingly mature
At present the small open fixed within than ordinary bengkaichuang push-pull window cost increases by about 10%, namely every square metre increase the $25-45 yuan, but considering the long-term energy saving effect, installation casement Windows are favorable.
Push-pull type window of model steel window in the future is expected to be flat to replace open window of model folding door. Building materials industry insiders believe that with the improvement of the living conditions and to pay more attention to the energy-saving, environmental protection, sealing, ventilated sex better casement Windows will more and more popular.
Push-pull type window of model steel window had its use reliable, simple processing advantages of popular market, but it also has many shortcomings, defect is sealing is poor, air tightness and water tightness index is bad, for heat preservation and heat insulation, energy saving and environment is not easy.
Ping and the greatest advantage of the window is just a good sealing property. According to estimates, at present the small open fixed within than ordinary bengkaichuang push-pull window cost increases by about 10%, namely every square metre increase the $25-45 yuan, but considering the long-term energy saving effect, installation casement Windows are favorable.
The past use bengkaichuang less, because of the past is a housing area is lesser, resident for that window open occupied part using windowsill area, do not wish to use. Two is to make the same score a window hardware mainly rely on imports, the price is higher, and the joint venture is especially domestic product quality and can’t keep up. Kdsbuilding expert says Three is open casement and window frame through the hinge joints, the flat to the open, use for a long time may cause casement fall off, the adverse consequences. Therefore, industry and local departments are out in high-rise buildings, banned in use.
In recent years, along with the construction industry the implementation of the basic state policy, especially in energy and water conservation, environmental protection and so on, to day the implementation of policy, the architecture components demand more and more heat preservation and heat insulation. At the same time, along with the gradual improvement of people’s living conditions, the per capita housing use area increases, people already don’t care so much about the little area occupied in opening the window. The promotion of bengkaichuang time increasingly mature.
Casement Windows will end "push-pull" era
Since this year, push-pull window market share continued to slide, make the same score a window quietly occupied city often according to the real estate industry a statistics data show that November, this year the housing projects of the wall in energy-saving index, use energy-saving performance good casement Windows already occupied the leading position (accounting for building outside the window use 69%), part of the big city real estate projects to use the casement Windows of building outside the window over 90% of the total. To this kind of phenomenon, experts think: the country’s energy policy and the improvement of living conditions make a building outside the window quickly end its single "push-pull" era, door window industry will be to energy saving, top grade, new type, multi-function, many kinds of direction.
"Physical" competition
In recent years, often hear people complain: push-pull type window of door of sealing is poor, often dust, the rain "visit" indoor, cooling severe winter, summer heat insulation is very poor, waste energy heating and cooling energy.
Because of push-pull type door window that face two casement is not in the same plane and, therefore, between two casement no seal compaction force there, just rely on top to overlap lap, tops exist between gap, so sealing function is very weak, energy saving effect also can sell at a discount greatly.
China construction science research institute of WuLiSuo WangHongTao said, energy saving the window is the development direction of our industry, how to understand what makes energy saving window, energy saving, must from thermodynamics of heat transfer on three factors: namely thermodynamics heat leakage (heat exchange) and the heat conduction and radiation of the convection, to know. Convection is in window and door between hot cold air gap circulating, cause gas cause convection drive the heat exchange, hot cold air convection heat generation the cycle of the loss. Heat transfer is by material itself the molecular motion of heat transfer, heat conduction through the object itself a surface transfer to another relative to the surface. Radiation heat transfer is energy to ray namely infrared directly transfer. No matter use what type of window, such as the above three heat to the most effective blocking and control, to the energy saving of called the best window.
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