Which is the better difference between internal heat and external heat of an electric soldering iron
The external thermoelectric soldering iron uses an electric heating tube on the outside, and the copper soldering iron head is heated inside the tube. The internal thermoelectric soldering iron uses an electric heating core to heat inside the copper soldering iron, and the thermal efficiency of the internal thermoelectric soldering iron is higher than that of the external thermoelectric soldering iron.
The internal heating element is located inside the copper head and has a relatively high thermal efficiency, while the external heating wire is located outside the copper head, and the power of the soldering iron is related to the area of the metal being welded. A low-power soldering iron is suitable for welding small parts. The power required for soldering semiconductor devices and integrated circuits shall not exceed 30W. High power soldering iron is used to weld larger parts.
The larger the metal area, the greater the power of the soldering iron used. Internally heated ones heat quickly, have a large head, short lifespan, and are usually small in capacity; External heating has a slower heating speed, smaller head, longer lifespan, and can be used for larger capacities, such as 300W1
The difference between internally heated and externally heated electric soldering irons:
1. Mainly due to differences in heating methods.
2. The shape of the soldering iron head they use, the former is a hollow cylindrical shape; The latter is solid rod shaped.
3. The former has a shorter preheating time, but is slightly more affected by temperature, especially for low-power models; Relatively, the latter has a slightly longer preheating time.
4. The former has slightly less leakage than the latter.
Firstly, it cannot be absolutely said that it is good, it depends on your purpose: welding small parts, such as electronic components, with good internal heat; Welding large parts, easy to use with external heat.
Secondly, the structure is different: the internal heating element is located inside the copper head, and its thermal efficiency is relatively high; The externally heated electric wire is located outside the copper head, and the power of the soldering iron is related to the area of the metal being welded.
Thirdly, in terms of power: Small power soldering irons are generally internally heated and suitable for welding small parts. The power required for soldering semiconductor devices and integrated circuits shall not exceed 30W. High power soldering irons are generally externally heated for welding larger components. The larger the metal area, the greater the power of the soldering iron used.
Fourthly, the heating speed is different: the internal heating type heats up quickly, has a large head, a short lifespan, and is usually small in capacity; External heating has a slower heating speed, smaller head, longer lifespan, and can be used for larger capacity.
I personally think that internally heated electric soldering irons are more useful because the soldering head of externally heated electric soldering irons on the market is not easy to solder and is not convenient to weld. In addition, if the welded object needs to be placed with leakage current and the temperature cannot be too high, then a temperature regulating electric soldering iron with leakage protection should be selected
