The heating principle of single-ended electric heating tube!

Due to differences between domestic and international markets, single-ended electric heaters are referred to differently, either as "single-ended" or "cartridge" heaters. In the Chinese electric heating industry, the model number has long been known as the M3. Since the late 1990s, with widespread use in China, heaters have evolved into a wide variety of shapes. In southern China, heaters for molds with wires exiting from one end are often referred to as "single-ended" heaters, a very descriptive term. Overseas, they are called "cartridge heaters," also a descriptive term, as the cartridge shell is cylindrical and one end is blocked, similar to the Chinese term "single-ended heater." Compared to double-ended heaters, single-ended heaters have wires exiting from one end, typically using a star connection. Single-ended heaters are commonly used for mold heating or air dry heating, primarily for mold heating. They are installed directly into a drilled hole in the mold, with gaskets added to the wire end to prevent movement.

When manufacturing single-ended electric heating tubes, professional technicians must pay special attention to the proper fit between the tube diameter and the template aperture. A tube diameter that is too large will prevent the tube from fitting properly into the aperture, and the tube's expansion after heating will cause inconvenience during subsequent repairs. Furthermore, the tube diameter should not be too small, leaving too much space between the tube and the aperture wall, as this will affect the heat transfer and service life of the tube. Furthermore, the power and voltage of the single-ended electric heating tube must be considered.

A heating tube is a metal tube with a resistance wire inside, similar to an electric stove wire.

The heating principle of a single-ended electric heating tube is that current passing through a resistor generates heat.

According to the law of electrothermal heating, the heat generated is proportional to the product of the square of the current and the resistance.

The principle of the thermal effect of current is that electrons are accelerated in an electric field, gaining kinetic energy and velocity. They then collide with other particles (atoms, molecules, and atomic clusters), causing them to gain kinetic energy, resulting in an increase in average kinetic energy and a rise in temperature.

The heating principle of a single-end electric heating element is mainly through the internal resistance wire to generate heat through the current. Under the condition of fixed voltage, the greater the resistance, the lower the power; the smaller the resistance, the greater the power. So, can using a resistance wire with a small resistance save more costs and improve thermal efficiency? The answer is no. Generally, the greater the resistance, the smaller the wire diameter of the resistance wire. Under the condition of fixed voltage, the greater the current passing through the resistance wire. When the current passing through exceeds the resistance wire's load, it is easy to break and damage. Therefore, the greater the resistance of the electric heating element, the better. You should choose the appropriate resistance wire according to the actual situation and to ensure normal use.