In the instant electric water heater, its four major schools mainly refer to four different heating technologies. These four major schools mainly refer to the "metal tube" school, the "glass tube" school, the "cast aluminum" school and the "semiconductor" school. "Ceramics" genre.
Metal tube:
It mainly refers to that the main heating element of the water heater is made of metal. The materials for making metal heating tubes on the market are mainly stainless steel, copper, etc., among which the material of red copper has good ductility, so it can make seamless copper tubes. At the same time, its thermal conductivity is also very strong, and it can also prevent water leakage and leakage during use. However, the cost of water heaters made of copper will be relatively higher, so most companies use stainless steel directly Heating tube made of material. The metal heating tube is the most used one now. Although its advantages are very outstanding, it can not avoid structural problems when in use, so it will easily bring hidden dangers of electric leakage and water leakage.
glass tube:
The non-metallic heating tubes on the market are mainly made of crystal, glass and ceramics. The advantage of the glass tube style is that the resistance film is applied to the outer wall of the glass tube. When the water flows through the glass tube, the water and electricity will be sufficient. To achieve separation, the safety performance can be more guaranteed. However, the heat conduction performance of the heat pipe made of glass and other materials is relatively poor, so it is easy to cause heat energy waste during the heating process, and at the same time, the In this case, it is also easy to cause the glass tube to burst.
Heating pipe
cast aluminum pipe:
The cast aluminum tube can achieve complete isolation between the waterway and the heating element when in use, and the water flowing in the pipeline gradually heats up, effectively avoiding the problem of scale caused by high-temperature static water heating, so it will not produce scale during use , Then the service life of the heating tube is also effectively extended. The disadvantage of cast aluminum pipe is that the heating element is heavier, and the production process is more complicated, and the production cost is high, so it has not been widely promoted.
Ceramic tube:
The ceramic tube completely solves the problem of fire caused by dry burning in the process of use. Through tube heat exchange, it can also achieve permanent water and electricity isolation. The water flow pipe and the ceramic are completely separated. The smoothness of the water pipe is higher. Problems with pipes and water leakage. However, the heating speed of the ceramic tube is relatively slow when the heating is started during the use process, and the production cost of the heating tube of this material is also higher.