The heating principle of non-metallic heating body is generally that the outer wall of non-metallic crystal tube, glass tube, or ceramic tube body is surrounded by a layer of electric heating film or heating wire, water is introduced into non-metallic pipes, and electricity is introduced outside non-metallic pipes, so as to realize the real separation of water and electricity. The utility model has the advantages of realizing the separation of water and electricity in a real sense, safety, high heat conduction efficiency, and no scaling; Disadvantages: the cost of crystal is too high. The glass tube is stable in nature and easy to burst in the environment resistant to sudden cooling and heating. It is difficult to ensure the process size of ceramic tube during sintering, and it is difficult to seal in the later product installation, which is easy to cause water heater leakage.
Today, people pay more and more attention to safety awareness. It is urgent to solve the scaling problem of water heater. Consumers are choosing fast heating type Intelligent thermostatic water heater manufactor Electric water heater The scale problem must be carefully considered. Now let's focus on the material of non-metallic heating body.
The so-called non-metallic heating element is precisely a non-metallic heat conductor. The non-metallic heating elements are divided into quartz glass tubes, ceramics, etc. When the electric heating film heats, part of it is absorbed by water and part by air, so the thermal efficiency is low. The heat energy of the electric heating film is transmitted to the water through the glass. The thermal conductivity of the glass is 0.52, and half of the heat energy will be wasted. Therefore, the thermal conductivity is very poor and the thermal efficiency is low.
The glass tube must bear the pressure of the tap water system, and the pressure will be greater when heated. The glass tube is brittle, non pressure resistant, and easily broken. The electric heating film attached to the surface of the glass tube is different from the glass tube material, and the expansion coefficient is also different. At high temperature, the two will separate, and the heating tube will be scrapped. The power of the electric heating film will decay with time, and then the power will become smaller and smaller, affecting the use effect.
