The temperature is lower, winter is the peak sales season of water heater products. With the improvement of the living standards of many consumers, electric water heaters have become indispensable household appliances in the ordinary family life. In the face of a dazzling array of electric water heater brands on the market, many consumers often feel Do not know what to do. How to buy a satisfactory, safe and durable electric water heater? In fact, as long as the purchase of attention to the following points, choose a good hot water Shun is not a difficult task.
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First, type selection
1, the choice of liner
Electric water heater liner is the key to the quality of the electric water heater. At present, the electric water heater liner can be roughly divided into three grades: the highest grade and the longest lifespan is the stainless steel liner. The stainless steel liner is made of high-quality imported stainless steel material. The use of advanced TIG welding can eliminate weld oxidation and has a service life of more than 15 years. However, the price of such electric water heaters is relatively high, and it is suitable for families with more economical resources. The mid-range is the enamel liner. The main countries in Europe use more, is made by burning a layer of inorganic ceramic glaze on the ordinary steel plate, does not rust and the cost is only 1/6-1/4 of the stainless steel liner. If the manufacturing process is poor, the glaze slurry adhered to different parts of the gallbladder may be unevenly distributed and porcelain may easily appear. Once there is a leakage of the porcelain water tank liner, it will affect the service life of the electric water heater. This electric water heater is affordable and suitable for the average family. The relatively low-grade galvanized liner coating curing resin, because the inner liner is in the heating environment of 70-80°C, the curing tree refers to the easy hydrolysis reaction, the zinc protection layer has poor rust prevention ability and the service life is short. Due to the low production cost, the selling price is also lower.
2. Selection of safety devices
As the use of electric water heaters and consumer personal safety related, so the choice of electric water heater must pay attention to safety performance. Electric water heaters should generally have protection of the makeup, anti-dry, anti-overheating, anti-overpressure devices, high-grade leakage protection and water-free automatic disconnection and additional power indication function. The pressure rating of the water heater's interior is generally 0.75MP?a (different types, the rating is also different). When the pressure of the overpressure protection device reaches the rated value, the safety valve shall be automatically opened to relieve the pressure. Ensure safety. Leakage protection devices are generally required to be able to shut off the power quickly within 0.1 seconds when the leakage current reaches 15mA. To buy products that have the Great Wall safety sign.
3, insulation effect selection
The power of electric water heaters has to be considered by consumers. The key to affecting the power consumption of water heaters is the effect of heat preservation, and should be considered when purchasing. The main factors affecting the insulation effect are the thickness of the insulation layer and the density of the insulation material. Consumers should choose a large thickness of the moisture-retaining layer and a large discount for the density of the insulation material, which can be selected according to the manufacturer's product specifications.
Second, capacity selection
Capacity selection mainly considers factors such as household entrance and hot water usage. A rated capacity of 30-40 liters of electric water heater, suitable for 3-4 continuous bath use; 40-50 liters of electric water heater suitable for 4-5 continuous bath use; 70-90 liters of electric water heater suitable for 5-6 consecutive bath use.
Third, additional functions
1, constant temperature thermostat function
The addition of an advanced magnetizing thermostat at the outlet pipe of the electric water heater can solve the problem of hot and cold water temperature and avoid scald accidents.
2, the disk function
A magnetic field is formed inside the magnetizer to increase the activity of water and have a health effect on the human body.
3, anti-corrosion cleaning function
Since the water heater is usually operated at a water temperature of 70-80 degrees, the descaling function is particularly important.
Fourth, brand selection
Consumers must examine the brand and after-sales service level of electric water heaters. Brand-name products are generally of good quality and can be sold after sale. They can also enjoy on-site installation, free machines, and other services.
Fifth, purchase precautions
1, appearance inspection
The paint on the outer surface should be uniform, bright in color, free from detachment, no dents or severe scratches, squeezing marks, etc.; all kinds of switches and knobs are beautiful in appearance and fine in processing; the handwriting on the dial should be clear.
2, prevent fake and shoddy products
Counterfeit products often use counterfeit trademarks and outfits or impersonate the assembled brand as imported goods. The general appearance of such products is rough, and the temperature rises slowly after power-on, which does not meet the standard requirements.
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