The temperature dropped sharply in winter, and the frequency of electric water heaters installed in our homes also increased.This electric water heater is familiar to everybody, but you may not know it and this electric water heater may also be a potential safety hazard.
In November 2011, Kobayashi in Shiyan City, Hubei Province, scalded in a shower.
In November 2012, Ms. Lee of Shapingba in Chongqing took a shower and the water heater suddenly deflagrated, causing 40% of her body burns.
Domestic electric water heater is a heated pressure vessel, its pressure mainly comes from the pressure of water and the expansion of steam generated when heating.If the electric water heater pressure relief valve fails, the pressure is too large, it may burst.
Chen Meishan, senior engineer of Shandong Metrology Institute Electric Measurement and Testing Center, said: 'The damage to the human body after the burst is caused by mechanical shock and the other is the scald injury caused by hot water and hot water. Leakage electric shock damage.
At this point, if the water heater on this small pressure relief valve normal, the pressure inside the water heater is too high, it will automatically open and release Internal pressure.Experts suggest that consumers use the water heater, to check the pressure relief valve working conditions, to prevent accidents.In the process of using electric water heaters, another particular need to be noted is to prevent water heater leakage.
Chen Changshan and other experimenters modeled the case of an electric water heater, saying: 'It can be found that its shell, outlet, inlet and outlet water have a great leakage current, the body will contact once there is electric burns It is also not easy to get rid of this current after being shocked. It will cause more harm and cause great harm to the human body, including the heart.
Experts suggest that you must buy with 3C safety certification of electric water heaters, installation, the outlet or plug to have leakage protection, taking care that the ground must be good contact.
Chen Changshan reminded everyone to use electric water heater in unfamiliar environment, even more attention to safety. 'It is best to observe the appearance of the water heater before use, whether there is leakage of leakage signs of corrosion, so there may be leakage risk, after burning water It is safer to unplug the power outlet before taking a bath, "he said.
Improper use, there is a potential safety hazard of electric water heaters, electric water heaters sold on the market how the overall quality of the situation? How many years need to be replaced?
In the recent 3 years, Shandong's quality supervision departments randomly spotted 31 batches of domestic electric water heaters and found that 2 batches of products were unqualified, mainly because energy efficiency rating, moisture resistance and mechanical strength were not up to standard. Failure to meet these standards may result in The problem is low heating efficiency, prone to leakage, easy to burst.In response to the problems found, quality supervision department launched a quality promotion action, urging manufacturers to rectify, strengthen product quality awareness and improve product quality in 2017, AQSIQ Supervision spot check data show that Shandong enterprises produce household electric water heater sampling rate of 100% pass.
This quality is getting better and better, that household electric water heater in use, how to conservation it?
Chen Changshan said: 'In the use of one year, it is best to find a professional to clean up the scale, or heating of the liner and the metal parts of the heating pipe corrosion, after a long period of its inner wire will leak out, it may Will be charged, security risks.
After using a long time, the scale will reduce the heating efficiency of the water heater, electricity does not say, but also easy to breed bacteria, so that bathing water quality is not good.
'In the coastal areas and other places where water quality is worse, it is more aggressive, so the service life of electric water heaters will be shorter, and it is generally considered to be replaced within six years,' said Chen Changshan.
Winter use electric water heater bath, we must pay attention to safety, in case in case, you'd better unplug the power and then take a bath.