Why it is a safety electric kettle

------The 4 protection of a safety electric kettle

The first protection: automatic power off when water is turned on, that is, automatic steam switch SA. When the water in the kettle is boiled out, the steam generated is sent to the silicon tube at the bottom through the steam tube, and then the steam is sent to the steam switch by the steam guide plate. Steam power switch inside the temperature-control spring of thermal deformation and the steam switch take action, using the lever principle to push the power switch, so as to realize the function of the water is boiling the power, the power cannot be automatically after the reply message, once the good electric kettle of water boiling immediately 1 of "pa" trip sounds, immediately stop boiling water.

The second protection: Prevent dry boiled protection thermostat, normal temperature condition, the thermostat is closed, can guarantee the circuit conduction, when the first steam power automatic switch failure, the water will continue to be heated (maintains a temperature of 100 ℃), until dry, then the temperature of the kettle body is more than 100 ℃, the bimetallic strip on the thermostat heating deformation push off contact, this is the second way to protect, That is, dry boiled protection.

The third protection: overheating protection, thermal cut-off when temperature is too high. The thermal has a fuse iniside, when the temperature of the electric kettle is too high or serious short circuit, the temperature reaches 139℃ or so, the fuse plays a role, fuse off power, play a protective role.

The above three protection in turn to ensure the normal and safe work of the electric kettle. This is an important component that distinguishes it from a stove or a simple kettle. Another protection: ground protection, which is designed to reduce the risk of electric shock. Different kettle thermostat, steam automatic switch is different, figure 6 corresponding to figure 4; Some products don't have a thermal fuse.

A good electric kettle should have the above four protection.

this artical is from: www.zs-lingfeng.com

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