Why can electric water heater explode?
Why the explosion temperature measurement system failure and pressure control system of electric water heater (or no pressure system), electric heating work non-stop, and finally became a boiler, the pressure increases, more than the water heater shell material capacity limit, explosion.
Do not buy cheap small appliances last December in Zhejiang province quality checks the quality of the report showed that 9 batches of water heater were tested only 6 batches of qualified, a pass rate of 2/3, most of the electric water heater leakage problem of the existence of substandard Water Leakage. However, the water heater used by the household is not in the spot check list. Ningbo Quality Supervision Bureau experts said, electric water heater in order to prevent the temperature is too high to cause an explosion, set three lines of defense, namely temperature controller, overheating protector and one-way valve. If the thermostat is out of order, the overheat protector will trip automatically when the temperature is too high. If the first two items are out of order, the one-way valve will exhaust the steam. Therefore, the electric water heater has higher safety performance than the gas water heater, and the quality problems in general are leakage, leakage and explosion, unless these three protections fail at the same time.
Do not buy cheap small appliances last December in Zhejiang province quality checks the quality of the report showed that 9 batches of water heater were tested only 6 batches of qualified, a pass rate of 2/3, most of the electric water heater leakage problem of the existence of substandard Water Leakage. However, the water heater used by the household is not in the spot check list. Ningbo Quality Supervision Bureau experts said, electric water heater in order to prevent the temperature is too high to cause an explosion, set three lines of defense, namely temperature controller, overheating protector and one-way valve. If the thermostat is out of order, the overheat protector will trip automatically when the temperature is too high. If the first two items are out of order, the one-way valve will exhaust the steam. Therefore, the electric water heater has higher safety performance than the gas water heater, and the quality problems in general are leakage, leakage and explosion, unless these three protections fail at the same time.
Is electric water heater safe in the end? Under what circumstances can an explosion occur? Yesterday, a lot of readers to talk about their views, city express reporter interviewed the experts. It is probably caused by steam. Mr. Li Qiuyu, inspector of the Boiler Inspection Institute of the Nanjing military area command, called to discuss his views. He said that the boiler and the water heater have some similarity, the biggest explosion of the boiler may be excessive temperature, producing large amounts of steam. He believes that a large number of steam water heater explosion, after the explosion, the water heater high temperature and high pressure water instantly turned into steam, forming a huge shock wave, and even walls were blown down. Mr. Wang, the reader, also agrees with the idea that the "dry heating" only causes the water heater to be destroyed by itself, but it has to produce the impact of the wall. It must be that there is water in the water heater, which produces high temperature steam
