What aspects should be paid attention to when purchasing electric water heaters?

Ordinary domestic water heaters are mostly electric water heaters. Now let's understand what energy-saving methods are available for purchasing electric water heaters.

Provide a convenient electric water heater for life: the product has been tested for safety, the quality is better, and the product has a safety mark. The company's service network is reliable and after-sales service is guaranteed. Counterfeit and inferior products usually use counterfeit signs and packaging, or fake assembled products into original products. This kind of product generally has a rough appearance, and it heats slowly after being energized, which does not meet the standard requirements.

Visual inspection:

The outer surface of the product is evenly painted, the color is bright, and there is no shedding, dents or serious damage, squeezing marks, etc. Various switches and knobs have beautiful appearance, fine processing, and clear writing on dials. Check whether the power plug is complete, the wiring is firm, and there is no bad contact. To check the power-on test and constant temperature performance, first check whether the light is on and whether the water outlet and power failure indication is reliable. When checking the constant temperature, set the temperature to a certain value. After reaching the set value, the electric water heater can automatically power off or switch power. Satisfying the above requirements indicates that the electric water heater has a good constant temperature performance, otherwise an abnormality will occur.

Choice of inner tank:

The stainless steel inner tank has a high grade and a long service life. The enamel liner is coated with inorganic ceramic glaze on the ordinary steel plate. When the manufacturing technology is poor, the thickness of the glaze paste attached to different parts of the bladder is uneven and the porcelain is easy to drop. The galvanized inner tank is coated with thermosetting resin, and the zinc protective layer has poor rust resistance and short service life.

Selection of safety devices:

Electric water heaters generally require grounding protection, drying prevention, over-temperature prevention, and over-pressure prevention devices. The good ones are leakage protection, automatic disconnection without water, and power-off indication functions. The rated value of the inner tank pressure of the water heater is generally 0.75 MPa (different models have different ratings). When the inner tank pressure of the overpressure protection device reaches the rated value, the safety valve should be reliably and automatically opened to release the pressure to ensure safety. Leakage protection devices usually require that when the leakage current reaches 15 mA, the power supply can be cut off within 0.1 seconds.

Insulation effect selection:

Products with high insulation thickness and insulation material density should be selected, and comparison and selection can be made according to the manufacturer's product specification.

Constant temperature performance:

Set the temperature value. After reaching the set value, the water heater can automatically cut off the power or switch the power.

Capacity selection:

Generally, an electric water heater with a rated capacity of 30-40 liters is suitable for continuous bathing for 3 to 4 people. A 40-50 liter electric water heater is suitable for continuous bathing for 4 to 5 people. A 70-90 liter electric water heater is suitable for 5-6 people. Of continuous bathing.