Beijing Consumers Association, so that consumers understand the real situation of the market in copper and aluminum composite radiator master the basis of the product's purchase, the China Consumer Association commissioned the National Building Materials Industry building hardware and plumbing products Quality Supervision, Inspection and Testing Center of Beijing 10 copper-aluminum composite airfoil heating radiator radiator market sales comparison test. A sample of the comparisons of test samples in consumer identity building materials market in Beijing, Heating supermarket to purchase, the sample involved 10 companies produced 10 copper and aluminum composite radiator. Radiator center distance is 600mm 8 1060mm 1 1800mm 1. Test basis and test projects TLF600 "copper and aluminum composite airfoil radiator" GB/T13754-1992 "heating radiator heat dissipation measurement method and explicit heat dissipation. Comparison test project: interface threaded accuracy, pressure testing, thermal performance and metal heat intensity of four. Third, the test results analysis (see Annex) 1,10 samples radiator heat dissipation measured with label matches the amount of heat is a measure of the product quality of the radiator of the most important indicators generally standard heat dissipation W / tablets or W / group. In order to define the standard for comparison of the amount of heat radiator, radiator heat emission testing standards in China provides for the determination of the amount of heat standard conditions, namely water temperature 95 ℃, water temperature 70 ° C ambient temperature of 18 ° C. The different radiator heat output measured under the same conditions (conditions) can be compared with each other. The comparison test standard Determination of the amount of heat radiator 10 samples. The 10 radiator Found express heat dissipation enterprise consistent label products, heat dissipation is not exaggerated or false. 2, the pressure experiments found no leak radiator is a thin-walled pressure vessels, pressure capacity is related to the use of safety. Copper and aluminum composite radiator must be soldered in the production assembly process, due to the complex structure of its own welding at prone Weld welding wear, lack of weld problems, leading to leakage, resulting in losses to the consumer. Radiator welding firmness of radiator pressure test visits to ensure that the radiator surface and connected at no leakage. 10 groups of radiators sample under in 1.5MPa test pressure, no leakage. The interface thread precision better interface thread precision detection is to investigate the normal assembly of the radiator. If the thread does not meet the accuracy requirements could easily lead to the radiator connection is not good, can not even function properly assembled, even if reluctantly assembled connection, is also prone to leakage at the threaded coupling nut and exhaust valve, water seepage, and radiator connection thread is easy in radiator broken, once the work pressure increases, caused by running water and other undesirable consequences. After testing, the group of 10 radiators samples outside interface thread meet the standard requirements. Metal heat intensity metal heat intensity q (W / kg? ℃) is a technical and economic indicators of the radiator to reflect the radiator material, energy, and other economic characteristics. The comparison of test samples of metal heat intensity value between 1.68 ~ 2.59W/kg? ℃. The aluminum wing pipe and brass copper and aluminum composite radiator used a direct impact on the quality of performance of the radiator. The radiator manufacturers to reduce costs, the choice of a thin-walled small diameter copper pipe material production radiator, metal heat intensity values ??are relatively high, but because of the thin-walled copper tube wall is thin, prone Splitting or welding wear, the use of after a period of time there will be leaks, brass loss and other phenomena. Large copper and aluminum composite radiator manufacturing enterprises are generally chosen thick-walled large caliber brass process guarantee a longer life, higher cost. The purchased 10 models in the comparison test sample mass of copper and aluminum composite heating radiator satisfactory the detection indicators meet the standard requirements. But we still have to appeal to the the radiator production enterprises should be responsible to the community point of view, to ensure the accuracy of corporate standards and promotional materials, and does not mislead consumers in general. Building materials sales market to establish an effective quality management system, strengthen the quality control of the product distribution of leasing stalls, to eliminate substandard products to enter the building materials market, safeguard the interests of consumers, and work together to build a healthy and orderly market. , Copper and aluminum composite radiator advantages and disadvantages of a strong economy. Copper, aluminum material very good thermal conductivity, heat capacity is much higher than other materials. Copper and aluminum composite radiator heat bid was much higher than the other materials radiators. Are non-ferrous metals as copper, aluminum, and its value over time grow, so have a higher rate of preserving the value of copper and aluminum composite radiator. 2, good comprehensive mechanical properties. Aluminum extrusions for its high strength, water tightness and air tightness, thermal conductivity, and attractive appearance, simple processing and is widely used in China's construction industry. Its good thermal conductivity advantages in recent years has been the number of radiators manufacturers seriously. 3, anti-alkaline water corrosion, long life. High quality copper and aluminum composite heat sink, using the advanced within flanging Hydraulic expanded joint patented technology, precise process parameters can completely eliminate the gap between the brass and aluminum extrusion tube radiator header tube and heat pipe All no need to do within the copper, anti-corrosion, anti-corrosion treatment. Therefore, it has a good resistance to alkaline water corrosion. China is now promoting the production of copper and aluminum composite column wing radiator, high alkalinity water quality conditions under the corrosion rate of 0.005mm / analysis, may have corrosion life of 50 years, to leave sufficient room in this condition it could ensure that the service life of 30 years or more. 4, with a wide range of applicability. Copper and aluminum composite plate heating radiator is made of brass and aluminum composite, special equipment, aluminum and brass high-pressure expansion make it close combination. Compact structure, beautiful appearance, easy to clean, light weight, high pressure, thermal effects (radiation, convection), durable and suitable for all heating systems. 5, brass and aluminum wing profiles connected prone to problems. Brass and aluminum profile is by swelling method close contact. Swelling generally use two methods of mechanical expander and hydraulic tube expander, if the presence of copper pipe wall thickness is uneven, uneven state of copper material, may cause radiator is used for a period of time between the brass and aluminum profiles lap gap, the cooling effect will be discounted. How to buy radiator heating radiator is currently available on the market are mainly the following types: cast iron, steel, aluminum, stainless steel, brass, copper and aluminum composite radiator. Cast iron radiators and long life, corrosion resistance, appearance, is not conducive to the household metering; the steel radiator short life, corrosion resistance, good appearance, can be divided into household metering; short life of aluminum radiators, not corrosion, general appearance separable household metering; the brass class of radiator long life, resistance to corrosion, good appearance, can be divided into household metering; copper and aluminum composite radiator light weight, good heat dissipation, energy saving, beautiful and durable, environmental protection and good. Select radiator, we must first understand the quality of water of their own home, choose different materials according to different water quality requirements and material corrosion products. Second, to understand the to each Material radiator manufacturing process. General of the steel molding titles and then welded steel pipe, manual welding and automatic welding points, automatic welding technology better weld strict uniform appearance processing also beautiful. Aluminum, aluminum alloy and die-cast aluminum, aluminum alloy is generally automatic welding, a radiator as a whole, the late maintenance-free, but if the amount of heat is not enough to replace the whole; die-cast aluminum monolithic as a whole then threaded connections, leakage may later use, but the benefit is the amount of heat is not enough you can add a number of pieces. Third, China is a big country of production, consumption and export of radiator, our radiators development, development, equipment and radiator production technology is by no means lagging behind other countries, the opposite is leading in some respects. Imports may not adapt to the conditions of our country, the kind only import the best view is not correct, rational choice. Fourth, consider a steel suit a wide variety of aesthetically beautiful appearance processing, aluminum and copper and aluminum style single, due to the aluminum, resulting in the appearance of ordinary appearance. Fifth, from internal corrosion point of view, be sure to buy well-known factory strength, brand products with state-of-the-art technology, equipment, workshop-style hand enterprises generally within antiseptic treatment is not in place. Sixth, the accessories must be brand first wife, or prone to leakage and other problems. In short, you want to select efficient, energy-saving, environmental protection, economic, aesthetic, durable and safe products. Copper and aluminum composite radiator: http://zhongjiakangnuo.b2b.hc360.com/ radiator price: http://nuanqipian1.zk71.com/ the radiator Ten brand: http://shenglaolunsi.wanye68.com/