What is Electric Kettle? | Full Guide How Do Electric Kettles Work?

I know you have many queries regarding an Electric Kettle like: – how does an electric kettle work? what is inside an electric kettle? what is the working mechanism of an electric kettle? and so on….. So, this post is all about how electric kettle work.

I hope you read this full post and gain knowledge about an electric kettle working mechanism.

Check Video About How an Electric Kettle Works?

Credits: – Into The Ordinary

What is an Electric Kettle?

A kettle, An Electric Kettle is an electrical appliance, that has a self-contained heating unit, for heating water💧, and automatically switches off when the water reaches a boiling point🌡️ or at a preset temperature below 100 °C.

It is thus different from the Stove Top Kettle, which is less energy efficient and takes longer to boil the same volume of water as the electric kettle.

If we use only kettles then kettles can be heated either by placing them on a stove or by their own internal electric heating element in the appliance versions.

When we use the word electric then we can say it Electric Kettle.

History of kettles

Many people used steam kettles, before the electric kettles advent. the water boiled, when one had to place the kettles on the gas stove.

The pressure building up of steam would push the lid, emitting a whistling sound that would alert the user that the water had boiled. That all changed when the electric kettle was invented in 1922.

It was further enhanced by adding a cool-touch handle and lid to prevent people from burning their hands.

Read This: – 4+ Best Uses of Electric Kettles?

What is inside an Electric Kettle?

If you want to know How Does an Electric Kettle Works, then we have told you in the details below for you, definitely read it.

Inside each Kettle is a metal coil. Electrical energy travels through the coil, turning into heat and warming the cold water inside it.

The working process of an electric kettle looks a little something like this:

Step 1: When the kettle is turned on, a large electric current flows through the coil or the ‘heating element’.

Step 2: The coil has electrical resistance. This resistance turns electrical energy into heat as it passes through the coil.

Step 3: The heat brings the water inside it to boiling point.

Step 4: Some kettles use a thermostat, which prompts them to switch off when the water reaches the right temperature.

How Many types of Kettles?

A. Stovetop Kettles

B. Electric Kettles

C. Whistling Kettles

D. Automatic Tea Kettles


Differences between these Kettles

What is Stovetop Kettle?

A stovetop kettle is a non-electric device that requires a gas stove to heat water.

What is Electric Kettle?

An electric kettle is an electrical device, which has a self-contained heating unit for heating water or milk, and it automatically shuts off when the water reaches the boiling point below 100 °C.

What is Whistling Kettle?

A whistling kettle is a kettle fitted with a device that emits an audible whistle when water is boiled in the kettle.

What is an Automatic Kettle?

We can say all electric kettles are automatic kettles, which have an automatic shut-off that stops heating the water when the boiling point is reached.

Full Electric Kettle Working Mechanism

Hi everyone welcome to this blog.

Do you like to make coffee☕ or tea at home? If you do you probably need to use a kettle to boil water.

I like to use an electric kettle because it heats up water fast and speeds yourself, automatically when the water is boiling.

If you’re curious about how an electric kettle works, then follow me let’s take a closer look at this post. 

You will see some basic concepts in physics but don’t worry you don’t need to know the theory behind them.

Here we provide simple and basic details with this you understand easily about the electric kettle that is used to make tea at home.

Do you ever wonder how electric kettles work to make water boil and how does it know when to switch off?

First,  let’s look at how an electric kettle heats up the water. when you plug the kettle into an electronic outlet.

A large electric current flows into the heating element, the heating element is the component of a heater that transforms electricity into heat.

In our case, the heating element is a coil of thick metal at the bottom of the kettle bass. The element’s resistance turns the electrical energy into heat.

In other words, the heating element gets hot when you put a kettle body on top of the base the heat passes from the heating element to the metal body.

Since the metal body is in direct contact with the water the heat then passes to the water by conduction and rapidly warms up the water.

🤔The next question is

How does the kettle disconnect when water is falling?

Obviously, the first idea that often comes to our mind is to use a temperature sensor.

Because we think a temperature sensor can sense the temperature of the water and the water is falling at 100 degrees centigrade with some electronics able to turn off the electricity when that is spoiling.

But it’s a problem of accuracy here with this idea because the temperature sensor will have some errors to it.

It will be impossible to get a temperature sensor exactly for 100-degree centigrade.

So maybe it’ll trigger at 99.9-degree centigrade. In this case, the water will not boil because the electricity will be turned off before the water reaches 100-degree centigrade.

On the other hand, if the error will be on the high set say 100 points 1-degree centigrade is the trigger point.

Then the water will not stop boiling because the kettle will never turn off. So this is not a very good idea in terms of accuracy in addition.

There’s another severe problem with water. This will be pure water. Thus distilled water is no salt in it and is at sea level.

So, if we go up to the mountain the water will boil at a temperature that’s lower than 100-degree centigrade.

And if we go down below the sea level say that that’s the area the water will boil at 100 points 5 degrees centigrade.

So, even if we are going to have a very accurate temperature sensor. It will be useless because it will only work at one spot at sea level.

Now to mention that the fact weather is also changing the atmospheric pressure. So the temperature sensor is not a very good idea.

Another idea in fact used in the popular kettle that we have around us is to use the vapor.

The idea is that when the water is falling the vapor is then coming out and the steam is coming out.

This is an indication that water is boiling.

In this case, you will need to worry about exactly the temperature of the water.

You just look at it as an instance that the vapor is starting to come off. This is indeed the idea of the electronics that we are using today.

Before going into the structure of the vapor idea.

Let’s look at an important structure of bi-metal. We have two pieces of metal one is copper and the other is iron.

When we warm up these two pieces they expand.

Read This: – Top 9+ Best Electric Kettles in 2022

Each metals has a different expansion with the same temperature. Therefore if we’re going to put these two pieces together like this and heat is assembly.

What will happen?

This piece of Bi-Metal was actually bent. The reason is that if one piece is becoming longer than the other one, then disassembling in structure is comparable to the other one.

Because one arc is longer than the other one, just like when they were separated into eight pieces.

Image of BiMetal

bi-metal working concept

Now we understand that bi-metal were banned after the increase in its temperature that’s the idea applied here in the electric kettle.


Let’s see the vapor idea structure. 

We have the body of the kettle, we have the water and we have a tube coming from inside down to the switch bottom area.

Here I’m exaggerating the length of the tube, so we can see clearly how to switch and bi-metal trigger work.

The red line represents the electric heater which is connected to the main through the contact here.

The blue line represents a power line. now the blue contact here is actually connected to the small lever here.

Which is in turn attached to this bi-metal.

So, the idea is that when the water is poly, the vapor will penetrate through this tube and go down the heat of the vapors will pass on this bi-metal.

The bi-metal assembly will Bend and move the lever and this will open the switch.

So, let’s have a look at it, here it is this is the vapor that comes in pumps up the bi-metal and brings up this piece, which disconnects the circuit ring.

We have a latch here. So once it’s moved then it will latch, I will not return even if the bi-metal is cooling off.

Like this so let’s have a look at it in here it is again when the water and the bi-metal are coded here.

It is when we have the vapor bending the bi-metal since we rely on the steam of the vapor going into the tube.

If the Kato is open without elite covering the vapor then the steam will go up.

There will not be enough pressure for it to go into the tube.

So, the bi-metal will not warm up and it will not disconnect. I’ve tested this with my kettle.

Final Words

So, Dear Readers, Thanks for reading this post. I hope you will understand how an electric kettle work. If you have any queries or suggestions, then you can comment below.

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