Electric water heater quality problems need attention

With the improvement of the living standards of consumers, electric water heaters have entered millions of households. However, the quality of electric water heaters on the market today is uneven and there are many hidden dangers. Not long ago, the AQSIQ announced the results of national supervision and spot checks on product quality of storage-type electric water heaters. There are six kinds of products that do not meet the standards.

Water storage electric water heaters have been favored by consumers in recent years because of their moderate price and convenient installation. It is understood that the results of sampling tests on storage-type electric water heaters in recent years have shown that, in addition to the above unqualified items, the quality of the storage-type electric water heaters is mainly concentrated in the following areas: Grounding measures, rated capacity , 24 hours inherent energy consumption coefficient, hot water output rate.

The results of the spot check show that the first problem is grounding measures. It mainly means that in normal use, once abnormal conditions of the grounding system other than the appliance occur, emergency protection measures should be provided. When the grounding system of the storage water heater installation environment is abnormal, There should also be emergency protection measures to prevent leakage currents from causing electric shock to users. However, some companies blindly reduce production costs. The structure of their products does not provide components that can provide emergency protection measures when the grounding system is abnormal, causing safety problems.

Followed by the rated capacity, the project assesses whether the volume of the electric water heater matches the marked volume. The standard requires that the electric heater volume deviation is plus or minus 10%. If the volume exceeds the deviation requirement, it will cause the heating performance of the product to decline. If the deviation is less than the standard requirement, it is a small charge, a shoddy, and harm the interests of consumers.

Once again, it is the inherent energy consumption coefficient for 24 hours. The main assessment is the thermal insulation effect of the hot water storage water heater during use. Storage-type electric water heaters have large power consumption. If the hot water stored in the water heater tank is not well insulated during normal use, it will result in the loss of hot water, making the water heater work frequently and wasting energy. The cost of consumers increases substantially in daily use. The project is unqualified. The reason for this is that the thickness and density of the insulation layer are not sufficient. However, there is also a need for companies to publicize, and indicators of energy efficiency of virtual indicators.

At present, the electric water heaters used by consumers in China are mainly storage-type electric water heaters, and the market has a large capacity. The quality of the products is quality or not, and it is related to the quality of life and safety of consumers. For this reason, the quality of water storage-type electric water heaters The problem cannot be ignored.

The industry believes that, first of all, companies need to strictly guard production barriers and organize production in strict accordance with relevant national standards. Enterprises must be strict with themselves, supervise production, and kill quality problems in the cradle. At the same time, the relevant state departments should also increase the supervision of this type of product, once found quality problems, immediately ordered rectification, and maintain a healthy and orderly development of the storage water heater market.

In the face of a dazzling array of electric water heaters on the market, consumers are inevitably profuse themselves. Experts suggest that when consumers purchase, they may wish to pay attention to the following aspects. One is the choice of liner material. The highest grade and longest lifespan is the stainless steel liner, which has a service life of more than 15 years, but the price of such electric water heaters is relatively high. The mid-range is the enamel liner. This kind of liner is made by burning a layer of inorganic pottery glaze on the ordinary steel plate, does not rust and costs only 1/6~1/4 of the stainless steel inner pot. This type of electric water heater is moderate in price. The lower-grade galvanized liner is manufactured using the inner wall coating thermosetting resin. In the heating environment of 70~80°C, the cured resin coated on the inner wall of the inner liner is prone to hydrolysis reaction, and the galvanized protective layer has slightly less rust resistance than the above two materials, resulting in a relatively short service life of the product, but the The cost and selling price are relatively low. The second is to check the electrical safety measures that should be included: grounding protection, anti-dry burning, anti-overheating, anti-overpressure devices, high-end leakage protection and waterless automatic disconnection and additional power indication function. The heat preservation effect of a water storage type electric water heater under normal use conditions will directly affect the power consumption value of the product. Insulation material and thickness and other factors are related to the effect of heat preservation. Consumers can obtain relevant information from the product specification.