1、 The concept of U-shaped heating tube
Tubular electric heating element (electric heating tube) is made of metal tube as the shell (including stainless steel and copper tube), and spiral electric heating alloy wire (nickel chromium, iron chromium alloy) is uniformly distributed along the central axis of the tube. The gaps are filled and compacted with magnesium oxide sand with good insulation and thermal conductivity. The ends of the tube mouth are sealed with silicone glue. This metal armored electric heating element can heat air, metal molds, and various liquids.
Metal tubular electric heater element (electric heating tube) is made by placing an electric heating element in a metal tube and tightly filling the gap with crystalline magnesium oxide powder with good heat resistance, thermal conductivity, and insulation properties, which is processed by other processes. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, and long service life. Widely applicable to various devices such as saltpeter tanks, water tanks, oil tanks, acid alkali tanks, melting furnaces for easily melted metals, air heating furnaces, drying furnaces, drying ovens, hot pressing molds, etc.
Electric heating tube is an electrical component specifically designed to convert electrical energy into thermal energy,Due to its affordable price and convenient use,Easy to install,pollution-free,Widely used in various heating scenarios,At present, there are many manufacturers producing electric heating elements with a general design service life of over 10000 hours. Far infrared radiation heating elements can have a service life of 5 heating seasons
2、 Classification of electric heating tubes
Oven heat sink electric heating tube
Sauna electric heating tube
Electric heating tube for water tank of rice steamer
Installation of tubular electric heating elements for electric boilers using fasteners
Pipe shaped electric heating elements for flange mounted electric boilers
Air electric heating tube
Liquid electric heating tube
Boiler electric heating tube
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3、 Calculation of heat generation of electric heating tube
A voltage regulator can be used to change the heat generation by adjusting the input voltage and current.
The heat generation is proportional to the square of the voltage and proportional to the square of the current.
The voltage has changed to its original state1/2When the heat generation becomes1/4
The current changes to its original state1/2At the same time, the heat generation also becomes1/4
How to verify high-quality electric heating tubes
The most intuitive way to verify the quality of an electric heating tube is to first wipe the surface of the tube clean, and then connect it to AC power220VPower supply, dry burn in air, turn off the power after the surface turns red. After the electric heating tube is completely cooled, wipe it with a napkin. There should be no black oxide powder on the white paper (not reacting with oxygen in the air), indicating that it is a high-quality electric heating tube.
Carbon fiber heating element is a competitive high-tech material in this century. Its emergence has sparked a new revolution in the field of electric heating, and replacing metal heating elements with carbon fiber heating elements will become an inevitable trend.