Install the "pot" on the roof, and when the sun is shining, hot water will flow out of the indoor water pipes. Many people have such a simple understanding of solar water heaters. Then, a recent explosion in the famous Huangming solar water heater exposed the safety hazards of solar water heaters and reminded people that they need to abide by safety regulations when using them and must not take it lightly.

　　Case:

　　Huangming Solar Explosion

　　The hot and cold water flow was automatically circulating. Suddenly there was a loud noise and broken glass flew down like snowflakes. Then a large piece of the roof collapsed and water was everywhere in the house... Recently, Mr. Wang, who runs a hotel in Wenshang County, Shandong Province, encountered An annoying thing: the Huangming solar water heater that the hotel had used for more than three years exploded again. The solar water heater cannot be used. The hotel will lose more than 1,000 yuan a day.

　　This is not the first time Mr. Wang has used the Huangming solar water heater. Six years ago, Mr. Wang purchased a set of Huangming Solar products, which exploded a year and a half ago. At that time, Huangming Solar replaced the relevant equipment for free. Unexpectedly, a year and a half later, this group of products exploded again. It is reported that fortunately it was lunch break and there was no one on the road, so no casualties were caused.

　 　On June 21, Zhou Chunling, brand director of Huangming Solar, admitted to reporters that the explosion was true. She believed that the explosion was caused by scale blocking the pipes. When the product Mr. Wang purchased exploded for the first time, Huangming replaced the equipment and suggested that the owner install water purification equipment. As a result, the owner did not follow the advice, laying the foundation for future disasters. safety hazard. "There is absolutely no problem with the quality of Huangming's products. Although the exploded solar water heater has expired its three-year warranty, we still agreed to the owner's request and replaced the pipe for free again to ensure that the product can be used normally."

　　Phenomenon:

　　It’s hard to tell whether solar energy is good or bad

　　The problem was detected in time and the pipes were replaced free of charge. As the leading brand in the solar energy industry with the largest scale and strength and the highest degree of product innovation, although Huangming handled the explosion in a timely manner, it still caused panic in a short period of time. Ms. Chen, who bought a solar water heater, said, "The safety of products from big brands cannot be guaranteed. Is the new one I bought at home safe?"

　　Just last year, Tiantian Muge, one of the winning bidders for home appliances going to the countryside, produced a household solar water heating system with the specification model QBJ-165/3.05/0.05 and a production date of March 20, 2011. Performance - Daily heat gain and hot water storage tank failed to meet standards and were deemed unqualified products by the Product Quality Supervision Department of the General Administration of Quality Supervision, Inspection and Quarantine. At the same time, international brand Ariston has also received many online complaints and posts from consumers accusing its products of poor quality due to frequent leaks of water and electricity.

　 　This is true for well-known brands, but the product quality and safety of small and medium-sized enterprises and unknown no-name companies are even more worrying. The most distressing thing for consumers is that because the solar energy industry is still a low-barrier industry for the time being, there are already more than a thousand large and small production companies. There are all kinds of products on the market, and novel concepts such as energy saving and low carbon are emerging one after another, making it difficult for consumers to Identify what kind of water heater is the safest and truly suitable for ordinary people's homes.

　　Tips:

　　Beware of hidden dangers when using solar energy

　 　“The safety of solar water heaters not only depends on the quality of the product itself, but also on later installation and maintenance. Many explosion accidents are actually caused by errors during installation or maintenance, such as scale blockage. Consumers are most concerned about this. It's easy to be negligent." In response to the frequent safety accidents of water heaters, Luo Yingjun, director of the Heat Utilization Professional Committee of the Beijing New and Renewable Energy Association, pointed out to consumers three major hidden dangers that should be paid attention to during use.

　　The first thing that should be paid attention to is pipeline leakage. Water leakage can be caused by users forgetting to close the valve or valve failure, as well as aging and damage to pipeline joints. This will not only reduce work efficiency, but also cause explosions. Secondly, the pipe exhaust is not smooth. Under high temperatures in summer, the water temperature in the water tank can reach the boiling point in less than two days. If the water is not used for a long time, the water tank will be in a high temperature and high pressure state for a long time. There may be problems such as poor exhaust, which may lead to an explosion. Third, if there is a lightning attack in summer, not only will the solar collector panels be destroyed, but the lightning will also flow directly into the room along the water conduit, causing people or electrical appliances in the room to be struck by lightning. "To avoid these safety accidents, first, we must choose brand products, and second, if we find problems, report them to the manufacturer in a timely manner, ask professionals to come to repair, and ask them to come to maintain pipes, water tanks and other equipment regularly. In addition, if there is a thunderstorm, Try not to use solar water heaters." Luo Yingjun said that compared with other types of water heaters, solar water heaters have many advantages, and their safety is generally no problem. Consumers only need to pay more attention during use.