Since the hand-held steam iron is in contact with water and water vapor during use, it is easy to cause leakage problems. What we need to know here is that the internal electric heating element structure of the electric iron is generally divided into two types: one is the cover type electric heating element and the other is the tubular electric heating tube, so there will be two forms of leakage.
1. Reasons for the leakage of electric iron with cover
First, due to accidental collision during use, the internal mica sheet is broken or the mica plate is displaced, causing the heating wire to collide with the metal bottom plate. The second is the aging and fragmentation of mica flakes, and the insulation performance declines. The third is that the humidity of the environment used or placed is relatively high, which causes the mica board to be damp and causes the insulation performance to decline.
2. Reasons for leakage of tubular irons
One is that the head of the electric heating line falls off and collides with the metal casing. The second is the oxidation of the sealing part of the lead wire of the electric heating tube, which leads to the decline of the insulation performance. The third is that the insulating magnetic tube sheathed between the lead and the power cord is broken, causing the connecting wire to collide with the metal casing.
In addition, the hand-held steam iron will leak water and cause the accident of a blown fuse. The steam iron shell is generally made of polypropylene plastic with good temperature resistance and insulation, and then the shell and the bottom plate are bonded by a special bonding method. Water leakage may occur after a period of use, because polypropylene is a non-polar plastic, so it is difficult to bond with conventional methods.
After some electric irons are used for a period of time, the phenomenon of burning fuse is easy to occur, and there is a slight "humming" sound when using. In some areas, the water quality is hard, and the water contains rich metal minerals. When the iron is used, water vapor is sprayed out, but these minerals are deposited in the iron. When the concentration of metal minerals increases, the conductivity increases, and the electrical power increases, there will be a "hum" sound, and the power fuse may be burned out.