Mode of Working of an Electric Kettle
Conventional electric kettles are placed directly on the cooktop. The heat from the flame boils the liquid present in the kettle, and as the water converts into steam, pressure develops inside the kettle and pushes against the lid leading to the characteristic whistling sound. On the other hand, an electric kettle doesn’t need to be placed on the cooktop since it does not require a fire source. It simply needs to be plugged into an external electrical source. Electric kettles boil water much more quickly as compared to conventional stovetop kettles.
Electric kettles have become one of the most easily available appliances in the market. There are thousands of models of modern electric kettles for consumers. The various models differ with respect to capacity and other features suited for people with different needs. However, the basic working method is the same for every electric kettle.
Carpenter Electric Company developed the first electric kettle in the year 1891. This electric kettle had a heating resistor in a separate compartment. In 1922, a company called Swan used an integrated heating element in which the heating element was put in a metal tube housed in the water chamber. Arthur L. Large improved this design by creating a fully immersive heating element in the year 1923.
The first automatic electric kettle was made by a company called Russell Hobbs in 1955. John C. Taylor invented the thermostat of the electric kettle, while Walter H. Bullpitt invented the safety valve.
Method of operation
The heating element is the critical component of an electric kettle because it cannot function without heating. The heating element is a resistor. Resistor means it is designed to offer resistance to the flow of electricity through it. As electricity flows through the resistor, resistance causes heat production. This heat energy increases the temperature of the water and rapidly brings it to the boiling point.
The thermostat is present in many advanced models of electric kettles. The thermostat controls the heating element and allows you to set various temperatures. It also switches off the heating process once the set temperature is attained. The thermostat contains a variable resistor and controls the heating element through a switch called a transistor. If the temperature is set high, the resistance offered by the resistor inside the thermostat becomes less, which causes more electricity to flow through the heating element and convert into heat. If the temperature is set low, the resistor offers high resistance, leading to lesser electricity flow through the heating element and lesser heat energy production.
In wireless technology, it is not surprising that smart wireless kettles have hit the market. The most popular is iKettle. The iKettle connects through Wi-Fi with the iPhone device of the user. The user can switch on the kettle and even control the temperature using the iPhone. This kettle can also integrate with Alexa and Google Assistant to enable control by voice commands.