In the face of a dazzling array of electric water heater brands on the market, many consumers often feel at a loss. How to buy a satisfactory, safe and durable electric water heater? In fact, as long as the following points in the purchase, choose an electric water heater is not a difficult task.
Tao Yilang Ceramic Water Heater
First, important parts and key performance
1, choose the right 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: stainless steel liner, enamel liner, galvanized liner.
The highest grade and longest lifespan is the stainless steel liner. Stainless steel liner-like selection of high-quality imported stainless steel materials, the use of advanced tungsten arc welding, can eliminate welding oxidation, the service life of up to 15 years. This kind of product has a higher price and is suitable for families with more economical resources.
The mid-range is the enamel liner. European countries 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. There are high demands on the manufacturing process, such as the blue diamond liner used by Midea's brand. The welded inner liner is pre-sanded on the inner surface to increase the enamel adsorption force. The most advanced 360-degree 3-dimensional rotary enamel using wet enamel is used. The glaze slurry is evenly adsorbed on the inner surface of the inner bladder, so that the interior of the inner liner is truly full-faced, with no dead-end enamel cover protection, and the coverage rate reaches over 99.99%. After being calcined at a high temperature of 870 degrees, it is integrated with the inner wall of the bladder. . With such high process requirements, the average manufacturer often deters because of the technology. Because of its high cost-effectiveness and mature technology, the fourth-generation electric water heaters on the market are generally adopting this type of bladder, and their product prices are more in line with the requirements of most Chinese families.
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. This type of product has basically been eliminated in the market.
2, there is a comprehensive safety protection device
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 be installed on the ground protection, 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 inner liner is generally 0.75 MPa. When the pressure of the overpressure protection device reaches the rated value, the safety valve should be automatically opened to release the pressure to ensure safety. Leakage protection devices are generally required to be able to quickly cut off the power within 0.1 seconds when the leakage current reaches 15mA. The ultra-long protection wall is one of the iconic leakage protection functional products. To buy products that have the Great Wall safety sign.
3, insulation effect should be good enough
The key to affecting the energy consumption of water heaters is the effect of heat preservation, which 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 try to choose a product with a large thickness of the moisturizing layer and a high density of the insulation material.
At present, the new fourth-generation electric water heater adopts advanced polyurethane integral foaming technology to form a dense foam layer, and the insulation layer is integrally molded to further reduce heat loss. The overall polyurethane foam layer thickness of 4-6CM, in practice, unplug the power can be kept up to 2-3 days.
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.
Many of the fourth-generation electric heating products use the capacity expansion technology, and the overall amount of hot water output is equivalent to 4 times the volume! For example, the United States of America e + capacity expansion technology, by the circuit intelligent sensing control system sensing temperature changes in the liner, and through control The system realizes the alternating heating of the water-storage heating pipe and the quick-heating heating pipe in the tank, and finally achieves the purpose and effect of capacity expansion. Practice has shown that using e + compatibilization technology to extend the bath time of 10 minutes! Under normal mode 60L hot water 184L, start the e + capacity to increase the amount of hot water 235L, prolific hot water 50L. That is, if there is capacity expansion technology, even if the capacity is low, it can be considered as appropriate.
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 descaling 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. Such as the United States and the like big brands, should be the consumer's brand coordinates reference.
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.
Six, annex to complete
When the power-on test and the constant temperature check are performed, the temperature is set to a certain value. When the set value is reached, the electric water heater can automatically switch off the power or change the power. If the above requirements are met, it means that the electric heater has a good constant temperature, otherwise it is abnormal.
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