What is the difference between internal heat and external heat electric soldering iron
1. Definition of internal heating electric soldering iron
The heating element is inside the solder copper head", or interpreted as "the soldering iron tip is covered outside the heating element", so that the heat is transferred from the inside to the soldering iron tip, which has the advantages of fast heating, high heating efficiency, small size, light weight, and low power consumption. Economical, easy to use, etc. It is suitable for soldering small components. However, due to the high temperature of the soldering iron tip, it is easy to oxidize and turn black, and the soldering iron core is easy to break, and the power is small, only 20W, 35W, 50W and other specifications.
2. Definition of external heating electric soldering iron
External heat refers to the heating outside, named after the heating resistor on the outside of the soldering iron tip. It is suitable for welding both large components and small components. There are 25W, 30W, 50W, 75W, 100W, 150W, 300W, etc.
The difference between external heat soldering iron and internal heat soldering iron
1. The difference in the structure of the soldering iron head
The inner heating type soldering iron tip is hollow, and its heating core is built-in.
The external heating type soldering iron tip is solid core, and its heating core is external.
You can see it clearly from the structure diagram of the electric soldering iron. The heating core of the external heating type is separated from the tip of the soldering iron with a heating tube in the middle.
2. The difference between the use of external heating electric soldering iron and internal heating electric soldering iron
The soldering iron head of the external heating type electric soldering iron is inside the heating core, which is also called an ordinary electric soldering iron.
Soldering ordinary products, there is no requirement for temperature, use an external heating type electric soldering iron. Since the heating resistance wire is outside the tip of the soldering iron, most of the heat is dissipated to the external space, so the heating efficiency is low and the heating speed is slow.
Generally, it takes 6 to 7 minutes to preheat before welding. Its volume is large, and it is inconvenient when soldering small devices. But it has the advantage that the soldering iron head can be used for a longer time and has a higher power.
Internal heating type electric soldering iron, the shape of the soldering iron tip used in the internal heating type electric soldering iron is a hollow cylinder, and the heating element is covered by the soldering iron tip, so that its heat is not easily dissipated into the air, so the heat utilization efficiency is higher and the warm-up time is shorter. Short, and the power generally does not need to be too large to meet the requirements. Generally, the internal heating power is below 50W, and the internal heating electric soldering iron of about 20W~30W is common. There are single handles and soldering stations. The 936 soldering station is a typical internal heat soldering iron, but it is also constant temperature. Now they are all lead-free soldering irons (lead-free soldering stations), which are better than the first two.
