The impact of the hottest technological innovation

2022-07-31
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The impact of scientific and technological innovation on the field of building energy-saving doors and windows

with the continuous promotion of China's building energy-saving policies, China's building energy-saving doors, windows and curtain walls enterprises have found many problems in docking with the real estate industry. The series of door and window products, energy conservation, price competition and other factors have built a "Besieged City" for our enterprise. In the introduction of this article, we will focus on analyzing the causes and solutions of this dilemma through the national energy-saving policy, the characteristics of existing door and window products and other aspects, hoping to help the development of enterprises

I. Development of China's building energy conservation policies

since the reform and opening up in China for decades, cities and towns have developed rapidly. With the continuous improvement of urbanization level and the continuous increase of energy prices such as oil, coal and electricity, land, water and other resources are becoming more and more tense. At present, China's building energy consumption has accounted for 30%-40% of the country's total energy consumption, and building energy conservation has become the key object of energy conservation

the national three-step energy conservation policy is often mentioned in the building door, window and curtain wall industry in China. China has implemented the 30% energy conservation standard for building energy conservation since 1986, and gradually implemented the 50% energy conservation standard since 1995. At present, some regions such as Beijing and Tianjin have begun to implement the 75% energy-saving design standard

with regard to the increasingly stringent energy-saving policies, manufacturers in China's door, window and curtain wall industry feel a more and more repressive sense of "besieging" in the process of integrating with the real estate industry. This is a besieged city woven with energy-saving policies, products and prices, which makes our doors, windows and curtain wall enterprises do not know how to advance and break through the besieged city

II. The current situation of China's building energy-saving doors and windows industry

first, the energy-saving building doors and windows in China's market mainly include plastic waste paper and paper price composition support steel doors and windows, heat insulation aluminum alloy doors and windows and wood doors and windows

plastic steel doors and windows were first developed by Germany in the late 1950s. With the worldwide energy crisis in 1972, plastic steel doors and windows with good energy-saving effects were widely used, which also promoted the improvement of profile production technology. The development of plastic steel doors and windows in China has been gradually promoted since the 1990s with the introduction of a large number of foreign advanced equipment and product brands. After nearly 20 years of development, foreign brands represented by German Vicat and Korean LG have occupied the high price market of plastic steel doors and windows. The domestic brands represented by Anhui Conch occupy the medium and low price market. At present, this kind of energy-saving doors and windows are mostly used in affordable residential buildings

insulated aluminum alloy doors and windows originated in the United States and Germany in the 1960s and 1970s. With the introduction of these two heat insulation technologies and equipment in the late 1990s, a number of well-known foreign door and window system brands have entered China at the same time. At present, the thermal insulation aluminum alloy doors and windows in the domestic market are divided into system doors and windows and domestic aluminum self-developed series. System doors and windows mainly include foreign brands from Europe and America, such as Germany Xuge and Italy aruk, and domestic brands such as Shenyang Zhengdian and Shanghai Wange. These system door and window products have the characteristics of complete series and mature technology. The project price is generally 700 yuan/m2 -1800 yuan/m2. Such energy-saving doors and windows are used in medium and high-end civil and commercial projects

solid wood doors and windows and aluminum wood composite doors and windows belong to the category of wood doors and windows. Modern solid wood and aluminum wood door and window technology comes from Germany and Italy. Due to the restrictions of cutting tools, molds and other conditions, the 58 series, 68 series and 78 series are still the main products in the Chinese market. At present, the brands of wooden doors and windows are still dominated by domestic well-known door and window companies. For example, Harbin senying, Beijing Meichi, Shanghai Yanhe, etc. The project price is generally higher than 1500 yuan/m2. Wooden doors and windows are still high-end energy-saving doors and windows, which are mainly used in high-end villas and high-end civil projects. Of course, we have also seen some exciting changes. For example, Shanghai Yanhe has begun to improve its product series through R & D and innovation, breaking the inertia thinking, and began to provide other door and window enterprises with finished products, hardware, etc., and began to move forward towards the systematic brand of wood doors and windows

the following is the proportion of various energy-saving building doors and windows in the domestic market: as shown in the figure

secondly, it is classified from the opening mode of building energy-saving doors and windows. At present, the opening modes of energy-saving doors and windows in China are mainly internal opening and external opening. Although there are many ways to open doors and windows, most of them can not meet the standards of energy-saving doors and windows due to structural design and other factors. We take sliding doors and windows as an example. The characteristics of this opening method are mainly reflected in the design of low cost and large air volume, and the sealing, wind pressure resistance and energy saving have become insurmountable natural barriers. At present, the internal opening (inverted) mode seems to be the only choice for the opening mode of building energy-saving doors and windows. Although it is unknown whether this opening method is really suitable for the architectural design concept of Chinese houses and the living habits of Chinese people, in the absence of other options, China's real estate enterprises, door and window enterprises and end users can only actively or passively choose it. It is gratifying that at present, a new type of door and window opening mode has emerged, which can not only realize the inverted function of micro ventilation of doors and windows, but also realize the inward moving ventilation function similar to sliding windows (not occupying indoor space). We look forward to more new ways of opening for Chinese architects and real estate enterprises to choose

III. difficulties in the field of building energy-saving doors and windows in China

1. Besieged by energy-saving policies and prices

with the promotion of China's building energy-saving policies, relevant national departments require the real estate industry to implement corresponding regional energy-saving policies in specific projects. Taking Beijing as an example, the K value of thermal insulation performance of doors and windows shall not be higher than 2. 0 has become a red line of building energy-saving doors and windows in Beijing. Some real estate enterprises even put forward higher energy-saving requirements according to their own requirements, such as K value not higher than 1. 8。 While raising the energy-saving requirements, the price conditions put forward by real estate enterprises have not been improved accordingly. In the past few years, purchase restriction, loan restriction, price restriction, real estate tax pilot and increasing the supply of affordable housing have been frequently seen in newspapers and radio stations and become the focus of market attention

under the continuous effect of these policies, the measurement and control link of some real estate developers' sales volume of experimental machines is the center of all experimental machines, and the capital chain has become more and more tense. Real estate enterprises have made strict control of procurement costs the leading priority of the company. On the premise of similar products, the performance can be basically achieved. Even in order to lower the purchase price, some products that can not meet the standard but have lower prices are adopted, that is, products that save 30% or 50% energy under the slogan of 75% energy saving

2。 As we mentioned earlier, there are not many products of the same kind that can be selected for door, window and curtain wall enterprises in China's construction projects

the plastic steel doors and windows industry is still in a quagmire. At present, there are hidden dangers in the quality of plastic window profiles in the Chinese market, coupled with the factors of window type and glass configuration in the Chinese real estate market, resulting in too many quality problems in plastic windows. Therefore, the general understanding of the real estate industry is that plastic steel doors and windows in the Chinese market are still low-end products. Although plastic steel doors and windows have the advantages of excellent thermal insulation performance and low price, plastic steel doors and windows that lack innovation can only be used in low-end projects such as government subsidized housing

the weakness of heat-insulating aluminum alloy doors and windows lies in the window type and cost. Due to the limitation of safety performance and environmental conditions, the outward opening series of side hung doors and windows has strict restrictions on its use in many cities. The only remaining internal doors and windows also make everyone love and hate. Although the appearance and performance are almost the same, the price difference is large due to the dispute between brand and non brand, system and non system. China's door, window and curtain wall enterprises have to bite the bullet and compress the profits on the internal opening energy-saving doors and windows to meet the purchase price requirements of real estate enterprises. If they can use cheap materials, they should try to use cheap materials

nationally, the average engineering market sales price of aluminum alloy doors and windows is about 550 yuan/square meter under the requirements of 50% building energy saving standard; When the building energy-saving standard is raised to 65%, the average market price of doors and windows is about 650 yuan/square meter. In other words, from the energy saving standard of 50% to the energy saving standard of 65%, the index has been increased by 30%, and the cost of insulated aluminum alloy windows has been increased by about 20%. However, if the energy-saving index is increased from 65% to 75%, the cost of insulated aluminum alloy windows will rise by more than 30%, although the energy-saving index is not greatly improved. Under the premise of increasing so many costs, real estate enterprises began to reconsider some wooden door and window products with low prices but no brand influence. Because in the case of similar prices, wooden doors and windows are undoubtedly a higher grade than heat-insulating aluminum alloy doors and windows

there is no doubt about the energy-saving performance of wooden door and window products. However, due to its high price, it is still only used in some high-end villa projects. The main reason for its high price is that wooden door and window manufacturers often invest millions of equipment and personnel in the initial preparation. In addition, due to the influence of restrictive factors such as imported cutting tools, iv58 and iv68 internal windows have become the same choice for wooden door and window enterprises in project bidding. Not that they don't want to use other series of bids, but because they really don't. It is undeniable that some top domestic enterprises began to emerge in the research of passive housing projects, especially the passive windows with wooden windows as the main body in the industry. However, due to price constraints, these new "concept windows" still have a long way to go before they can be used in real batches in China

in 2014, the domestic energy-saving door, window and curtain wall industry is experiencing an unprecedented "challenge". The promotion of national building energy efficiency standards has impacted the market structure of the industry; The market is full of low-end products in the industry, and backward production capacity is seriously surplus; The public lacks knowledge of doors and windows, the state lacks supervision, and the quality problems of building doors and windows are rampant These are intertwined with the current turbulent real estate market and have become a besieged city hindering the development of energy-saving doors, windows and curtain walls enterprises

IV. scientific and technological innovation is the only way out of the besieged city

scientific and technological innovation refers to the process of creating and applying new knowledge, new technology and new process, adopting new production mode and management mode, developing new products, improving product quality and providing new services. There are many successful cases in the world that we can follow. From them, we can find a way for China's energy-saving door, window and curtain wall enterprises to break through

1。 Innovation in building energy-saving door and window materials and opening methods

like other industries, scientific and technological innovation is also the only way for the building energy-saving door, window and curtain wall industry to get out of the besieged city

first of all, we can consider innovation from the main materials with low prices for energy-saving doors, windows and curtain walls. Taking wooden doors and windows as an example, the products introduced from Europe and the United States mainly include solid wood and aluminum wood. In order to adapt to the appearance characteristics of Chinese architectural design, aluminum wood doors and windows are mostly used in the real estate industry. The existing aluminum wood doors and windows are reserved for pure solid wood doors and windows

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