What are the features and disadvantages of internal heating electric irons and external heating irons?
Internal heating type electric welding head is inserted into the electric coil connected (insulation) heat, heating coil external heat to air cooling, so the efficiency is poor; the external heating type electric welding head is a connected electric heating coil (insulation) heat, heat the basic electric heating coil by using the iron head connected, so the heat, the heat is higher; compared with internal, external heat type heat type 20W = 25W effect.
Outside the heat live outside the heat with a small head, not the screw out of the way,
Outside heat: iron head relatively thin, inserted in the middle of the iron. Internal heating type: the iron is small in size, and the iron head is wrapped with a soldering iron core.Internal heating type: relatively light, high efficiency, energy saving, disadvantages: the iron core is easier to burn out, and the service life is shorter.External heating: it is a traditional process with long service life. Disadvantages: compared with electricity, the volume is larger than that of internal heating.Such as welding ordinary circuit board, the internal heat type 10W or so can be, the outside heat type to 30W or so.
