Is it better to heat the soldering iron on the inside or the outside?
First, can not absolutely say that kind of good, depending on what you use: welding small parts, such as electronic components, internal heat of good; welding large parts, external heat of good use.
Second, the structure is different: endothermic heating element in the copper head inside, its thermal efficiency is relatively high; external hot wire in the copper head outside, the power of the iron and the welding of the metal area.
Third, the power: small power soldering iron is generally endothermic, suitable for welding small parts. Such as welding semiconductor devices and integrated circuits is not greater than 30 W. High-power soldering iron is generally external heat, welding larger pieces. The larger the metal area, the greater the power of the soldering iron used.
Fourth, the heating speed is not the same: endothermic hot fast, big head, short life, usually small capacity; external hot hot hot slower, small head, long life, can be used for larger capacity.
Definition of endothermic soldering iron
Heat element in the soldering copper head of the internal", or explained as "its soldering iron head set in the external heat generator", so that the heat from the inside to the iron head, has a hot fast, high heating efficiency, small size, light weight, power consumption, the use of dexterity and other advantages. Suitable for welding small components. But due to the high temperature of the soldering iron head is easy to oxidize black, the iron core is easy to be broken, and the power is small, only 20W, 35W, 50W and so on several specifications.
Definition of external heat soldering iron
External heat means heat outside because of the heating resistance in the outside of the iron head and the name. It is suitable for soldering both large components and small components. There are 25W, 30W, 50W, 75W, 100W, 150W, 300W and so on.
