What is the difference between the three different materials of cartridge heater?

What is the difference between the three different materials of cartridge heater?

1. Stainless steel

Stainless steel sheathed heater: The technology of stainless steel heating tube is earlier, but due to the poor ductility of stainless steel, the metal sheath and inner tank of the heating tube are made of seam stainless steel tube heater, which is full of welding (the more heating tubes, the more welding) , The surface load of the heating tube is high and it is easy to scale. This kind of congenital defect is inevitable, which seriously affects the heat dissipation of the metal heating body. If it is light, the heating time will be prolonged and consume power. If it is heavy, the heat energy of the heating wire cannot be transmitted. The heating wire is easy to break in a short time, and the charging in the water endangers safety. Even if a magnesium rod is added to protect the heating body, the volume limitation can only alleviate the problem of the heater to a certain extent. Therefore, the safety problem of stainless steel heaters and safety problems of stainless steel can also be solved within a certain period of time.

2.Glass

Glass conductive film heating tube: can better solve the anti-corrosion function. But when the temperature difference between north and south is large, it will burst and cause water leakage. In addition, the heating film will age rapidly, the annual electricity consumption will drop by more than 20%, the energy consumption will be high, and there will be safety risks.

3. Red copper

Pure copper (oxygen-free copper) heater: Copper has strong oxidation resistance and corrosion resistance, not only can reduce the harm of scale, but also has much better thermal conductivity than stainless steel. At the same time, oxygen-free copper red has strong ductility, so seamless pure copper pipe and copper pipe welding can reduce the number of welds. The potential of copper is much lower than that of impurity elements in the water, and it will not be subject to electrical corrosion. The harm of scale is fundamentally eliminated, and the thermal efficiency is improved. According to the recent test report of the Electric Water Heater Laboratory of the China Household Electrical Appliances Quality Supervision and Inspection Center and the test results of the relevant water appliances of the China Centers for Disease Control and Prevention, the oxygen-free copper water heater is 100% antibacterial in the selection and design of the material, and the anti-mildew property is in the test material In the first place. However, the material cost of oxygen-free copper is four times that of stainless steel, and the cost is too high, which affects its instantaneous heat generation.