The reason that instant electric water heaters can be heated instantly depends on its working principle. The heating element is the core accessory of the electric water heater. What types of electric water heaters are available?

1. Metal material:

The stainless steel heating element has a thick bent copper tube inside. After the machine is energized with water, the copper tube generates heat, and the water flows through the heating element to take away the heat.

However, if the local water quality is bad, after a long time using, it is will have the scale.It will also have such situation.If you open it in 20 seconds after the first time using,there will be lingering warmth.You have to pay attention for this to avoid the skin empyrosis.

Stainless steel heating electric water heater, click here

2. Ceramic material:

The heating body made of semiconductor ceramic materia,itl can show different electric heating characteristics according to different temperatures, and automatically change its own power.

The disadvantage is that the heating speed will be slow and high manufacturing cost,so most of manufacturers don’t want to use this material.

3. Quartz material:

The advantages of the quartz heating element: It applies the resistance film to the outer wall of the glass tube. When water flows through the inner wall of the glass tube, it can be separated by water and electricity, so the safety performance is good.

Disadvantages:A large amount of energy is wasted during heating due to poor thermal conductivity. The temperature outside the tube wall is extremely high. During the heating process, when cold water passes through the inside, the inside of the glass tube will expand and contract, resulting in a large twisting stress, which easily causes the glass tube to burst. Even if it does not burst, it will greatly shorten the life of the glass tube. Moreover, the glass tube has high hardness, but its toughness is very small, and its bearing capacity is limited. When the tap water pressure is too high, it is easy to break.

4. Cast aluminum material:

The heating element is formed by die-casting the tubular electric heating element and metal aluminum together, and the two elements are closely combine. This is a high-efficiency heater with well-distributed heat division and an aluminum alloy with excellent thermal conductivity, which can ensure the hot surface temperature well-distributed.

Disadvantages: The heating element is relatively heavy, the manufacturing process is relatively complicated and the cost is high. The second use after a short interval will have lingering warmth, and it is easy to burn the skin.

Cast aluminum heating electric water heater, click here

5. Mixed materials:

Nickel chromium heating element heating body use the engineering plastic mixed material, which has high rigidity, high mechanical strength, good heat resistance and good electrical insulation. It can be used for a long time in the harsh chemical and physical environment, but the price is also higher.

Nickel chromium heating electric water heater, click here