Consumers buy range hood in order to quickly exhaust lampblack and exhaust gas when cooking, but before buying range hood, consumers have no way to know its effect. Therefore, the national standard clearly stipulates that through the professional equipment in the laboratory to test the range hood products, and then get the energy efficiency grade values, must be marked in the product eye-catching position. This is also the most intuitive basis for consumers to judge the performance of range hood. However, according to the latest supervision and random inspection results of range hood products released by Guangdong Provincial Market Supervision Bureau, a total of 18 range hoods are unqualified, and some range hoods still have false energy efficiency grades, and do not make energy efficiency records. < p > < p > the latest spot check results of range hood product quality supervision conducted by Guangdong provincial market supervision and Administration Bureau showed that 18 products produced by 17 enterprises were unqualified. A total of 100 range hood products produced by 78 enterprises were selected in this spot check, involving 4 cities in Guangdong Province, including Guangzhou, Shenzhen, Foshan and Zhongshan, as well as provinces, cities and special administrative regions such as Shanghai, Jiangsu, Zhejiang, Shandong and Hong Kong. < p > < p > law enforcement personnel told reporters that there were many problems in safety items and performance related items in the past. It mainly includes the structure of range hood products, protection of touching live parts, grounding measures, air volume, wind pressure, energy efficiency grade, etc. The problems of these projects directly threaten the safety of consumers or seriously affect the use experience of consumers, so these projects are listed as key projects in this supervision and random inspection. < p > < p > in Foshan Quality Measurement Supervision and testing center, which undertakes the inspection task, the inspectors told reporters that the main performance indicators of range hood include air performance and energy efficiency grade. The judgment of air performance is mainly based on the test of air volume and air pressure. < / P > < p > in the test, the nominal air volume of some products is more than 13 m3 / min, and the measured value is only 8.8 m3 / min, which is not only less than 70% of its own nominal value, but also far lower than the national standard requirement of air volume no less than 10 m3 / min. Similarly, the national standard requires that the wind pressure should not be less than 100 Pa. for some products, the nominal wind pressure is not less than 260 PA, and the measured value is only 88 PA, and the measured value only reaches one third of the nominal value. Senior engineer of Foshan Quality Measurement Supervision and Testing Center Liang ranfeng: air volume and wind pressure, which is a main indicator reflecting the suction force of range hood, if its suction is not enough, it will cause a large amount of cooking fume in the kitchen. The unqualified reason is related to the design of product air duct. If the design is unreasonable, it will lead to the air volume and wind pressure too low, and the range hood can not exhaust the gas out of the kitchen in time. < / P > < p > after testing, there are four brands of range hood, namely, baidewang, opaicn, krrwon and iegli, which fail to meet the requirements of national standards in the test of air volume and air pressure, resulting in air performance items unqualified. At the same time, another important performance index of range hood is energy efficiency grade. In this quality supervision and random inspection, 12 models of products with the names of yongduotian, crown, opaicn, crown Tangshen and other brands were determined as unqualified, and the unqualified items were total pressure efficiency and normal odor reduction degree. Liang ranfeng, senior engineer of Foshan Quality Measurement Supervision and testing center: the lowest requirement of the national standard for total pressure efficiency is level five energy efficiency, and the standard value is greater than or equal to 15%. However, we found that only 10% of a certain product is far lower than the national energy efficiency standard. For normal odor reduction, the national standard requires that the secondary energy efficiency is 95%. In the actual measurement, it is found that the standard of a certain product is the secondary energy efficiency, but in fact, only 93% of the product does not meet the national secondary standard, which belongs to the false standard. < / P > < p > wind pressure, air volume, total pressure efficiency and normal odor reduction can only be concluded after being tested by professional equipment in the laboratory. Ordinary consumers have no way to know. At present, the most intuitive basis for consumers to judge the performance of range hood products is the value of energy efficiency grade. This value based on the conclusion of the test index is required to be marked in the eye-catching position of the energy efficiency label. < / P > < p > the inspectors told reporters that products that do not paste energy efficiency labels on the outer packaging of products and do not label energy efficiency grades as required can be directly determined as unqualified products. Yue Junmin, senior engineer of Foshan Quality Measurement Supervision and testing center: there is another case where the energy efficiency label is posted, but the information on the energy efficiency label is inconsistent with the information recorded on the website. < / P > < p > in this random inspection, the inspectors also found that although some products can be scanned, the content that the code scanning points to is not the information of the product registered in China Energy Efficiency Center at all, but a sentence on the website of the merchant – “what you purchased is the original genuine product, please rest assured to use”, which obviously belongs to fraud. < / P > < p > the relevant statistical data show that, at present, the range hood Market in China is developing towards the trend of big wind and large suction. The range hood with higher air volume and energy efficiency index is more likely to be favored by consumers. By comparing the quality inspection results of range hood in Beijing and Shanghai in recent two years, the reporter found that the products with unqualified energy efficiency grade almost accounted for the unqualified About 30% of the sample, the behavior of false label of energy efficiency label causes obstacles for consumers to judge the performance of range hood. < / P > < p > false mark or the mark is not marked, which is misleading consumers. In the latest quality supervision and random inspection of range hood issued by Guangdong market supervision bureau, a total of 18 products were judged unqualified, of which 12 were unqualified because of the energy level, accounting for nearly 70% of the total number of unqualified products. In other words, false or non-standard energy efficiency grade has become the main problem. In addition, in the process of testing, the inspectors also found other potential risks. < / P > < p > the reporter noted that 11 products were found to be unqualified in power connection and external cord items. The number of unqualified products is second only to that of energy efficiency grade. Testing personnel told reporters that the project is not qualified, which may lead to heat, insulation damage, fire or electric shock. However, the two power lines with no difference on the surface have great differences in internal structure and heat resistance temperature. < / P > < p > the testing personnel told the reporter that the reason why enterprises want to use low-grade power cord instead of the high-grade power cord specified in the standard is mainly to save cost. Although this part of the cost savings for enterprises may increase profits, but it will bring great security risks to consumers. In the detection process, the reporter noticed that a range hood was working, and suddenly smoke. Chen Jie, engineer of Foshan Quality Measurement Supervision and testing center: the reason why the range hood that smoked just now is that it is not equipped with thermal protector and it has no protective device. So in the case of its abnormal use, its temperature will be too high, has burned out the (motor) winding. This kind of situation can easily lead to the danger of fire. The results of this quality supervision and random inspection show that the main means of competition of some manufacturers is price because of their limited popularity. In order to make products have price advantage, manufacturers even sacrifice the performance of products and the safety of consumers. For example, the problems existing in the structure of range hood products on the market have been found in the supervision and random inspection. According to the national standard, there should be no sharp edge on the appliance that may cause damage to the user’s normal use or maintenance. There shall be no exposed tips of self tapping screws or other fasteners accessible to the user. However, in the actual detection, samples with these two problems have been found. < / P > < p > at the same time, in order to ensure that the range hood can be installed stably and prevent falling. The national standard also stipulates that the range hood should be firmly fixed on the wall or other supporting objects, and a device should be installed to prevent the range hood from falling from the supporting object. However, the inspectors found that many products were not equipped with such devices. < / P > < p > because the normal use height of range hood is above the head of a person, once it is dropped, it is very likely to hit the user’s head and cause serious personal injury. Therefore, the inspectors repeatedly remind that although the fixed device for preventing accidental drop of range hood looks very simple, it is very important. < p > < p > engineer of Foshan Quality Measurement Supervision and Testing Center Peng Baisheng: when installing range hood, consumers should pay attention to the instruction manual and install the pressure plate to prevent the range hood from falling accidentally. We can also use this anti dropping device in the process of installation, that is, there is a screw on it after installation to prevent the range hood from falling down when it is pushed upward. < / P > < p > the range hood is equipped with sharp edge or self tapping screw tip which is easy to be touched by users during normal use and maintenance; the installation process of the product is too simple, and the fixing device only has hook, and there is no fixed device to prevent accidental falling, which may cause the range hood to fall down. These national standards do not allow the occurrence of problems, this supervision spot check in a total of 10 products were found, these products were judged to be unqualified. < / P > < p > the inspectors told reporters that the main reason for the disqualification of products in structural projects was that the enterprises did not design the products reasonably according to the standards; there were no strict quality control measures. Similar problems also appear in the detection of product power connection. Yue Junmin, senior engineer of Foshan Quality Measurement Supervision and testing center, said: according to the standard, the connection position of power cord can not be subject to tension, so it is necessary to install flexible cable fixing device for power cord. Although there is a pressure clamp at the position of the junction box, the power line can still be extended into this position with one hand, which will cause the position of the power terminal to be pulled, which is unqualified according to the standard requirements. < / P > < p > the inspectors told the reporter that the design of such a kind of cable which is not fixed but installed with a pressure clamp is totally thankless to the enterprise. The root cause is that the enterprise has not carried out the design and quality control in accordance with the product standards. This may seem like a small matter, but it may bring great hidden danger to the personal safety of consumers. < / P > < p > the parts and facilities that should be done are shoddy, but the details that should be done in place are poorly made. The reporter found that in the 12 testing items involved in the quality supervision and spot check, many enterprises’ products were unqualified. < / P > < p > among them, the range hood products with the nominal trademark opaicn involve up to 9 unqualified items, the products with the nominal trademark of yasley involve 7 unqualified items, and the products with the nominal trademarks of Shanghai Shengbao kitchen and krwon also involve 6 unqualified items. < / P > < p > the relevant law enforcement departments are taking active measures to solve the quality problems found in the supervision and random inspection, as well as the false and false energy labels. Zeng Guang, quality supervision department of Guangdong market supervision administration, ordered producers to stop production and sales of the same kind of products