What is an induction cooker? Structure and working principle of induction cooker

Induction cookers today are gradually becoming a consumer trend of Vietnamese people. With high technical and aesthetic features to meet the needs of modern life. So what is an induction cooker? How does it work and how does it work? Let’s find out the following information with Dien May Xanh!

What is an induction cooker? Structure and working principle of the induction cooker

Induction cooker is a smart cooking device that uses electricity to operate. With the principle that when the stove is in operation, the current will flow through the copper coil placed under the kitchen glass and generate a magnetic field within a few millimeters on the stove. cooktop, from which to heat a pot with a magnetic base to cook food.

Construction of an induction cooker

Design, shape of the induction cooker

Induction hobs are designed in various shapes such as square, round or oval, depending on your wishes, you can choose your favorite shape of the induction cooker.

With a classic black color mixed with a little modern, it will help your family’s kitchen space more luxurious. Depending on the type of kitchen from yin or yang, it will affect the thickness of the kitchen. Mostly the thickness will be between 7cm – 25cm very easy to install so you don’t need to worry about this.

For the upper surface of the stove is made up of a layer of glass with good insulation and strength, with a thickness of 4cm – 7cm. The surface is designed with a control panel, buttons to help you manipulate easily during the use of the kitchen.

Heater

The heater plate, also known as the inductor, is an important component in the structure of the induction cooker. Helps to clean heat and ensure durability and safety during cooking. The induction cooktop is composed of a single circle, connected by super-strong copper wires, coiled on a flat surface. When activating the current flowing through the electric plate, the induction cooker will automatically recognize the size of the pot and only generate enough heat for the size of the cooking pot.

As for the induction hob, which is made of copper coils installed under the cooking surface, usually under heat-resistant glass, and a high alternating current is passed through the inductor. The current in the coil will create a magnetic field and have a continuous change. It will detect the magnetic cooking surface and heat the surface. Therefore, when cooking with an induction hob, your hand accidentally touches the outside of the cooking zone but does not feel hot.

In addition to the heat sensor unit attached to the wire tray, in the induction cooker there is also a heat sensor attached to the IGBT capacity clamshell with the heat sink. It is firmly mounted on a rubber knob with good elasticity with the suction ability of the induction hob glass. In addition, the induction cooker also has a white glue coating to cover the sensor, it helps to transfer heat from the glass to the sensor better.

It also has the effect of measuring the temperature on the glass and standing the temperature for the IGBT capacity in the induction cooker. If there is a change in heat from the power clamshell, it will immediately notify the microprocessor to issue a control command to turn off the stove.

Cooling fan

Cooling fans or cooling fans, exhaust fans in induction cookers take on the role of cooling, reducing the heat of the components in the induction cooker, rebalancing the temperature when the stove operates at too high a capacity. Protect components and the operation of the induction cooker is always stable.

Each induction cooker is equipped with 1 to 2 cooling fans depending on the number of cooking zones of the stove and the quality of the fan. As a rule of thumb, double induction cookers will design 2 cooling fans, with an induction cooker with only 1 fan. However, the number of cooling fans is not important, what matters is the type of heatsink being used to balance the kitchen temperature when cooking.

Induction cooker cooling fans usually have 2 types:

• Coaxial fan
• Turbine fan

In particular, turbine fans are often used for high-end imported induction cookers, while coaxial fans are often used in cheaper induction cookers. usually only need to install 1 unit, the induction cooker can cool the internal components. But the cost of turbine fans is also quite expensive.

The cooling fan in the induction cooker operates with a DC voltage of 18V. The fan only works when the power supply is plugged in the correct direction (+), (-). During use, the fan often shows signs of damage due to dry oil, loosening screws and very little electrical damage.

If the used coaxial fans want to upgrade and change to turbine fans, it is difficult. Because the structure of the induction cooker has been designed, the control chips of these two types of fans are also different. Therefore, when choosing an induction cooker, you should consider the components of these two types of fans.

Induction cooker circuit board

Each induction cooker device has a different circuit structure. However, the structure of the induction cooker circuitry will usually have:

• Power supply and rectifier circuit
• Switching source open interrupt, pulse source
• Scallop capacity IGBT
• Capacitor
• Panel Coil
• Temperature sensors
• MUC processor block
• Cooling fan
• Heat sensor
• Bridge diode
• And a few other small components in the induction cooker circuit.

With the structure of the induction cooker, the induction cooker board is a rather large and easy to see part. For double induction cookers, the board is quite complicated because it is printed in two layers.

The control board plays an important role, it decides the entire operation of the induction cooker. The induction cooker circuit will do the job of providing high-frequency current to the induction cooker. The circuit board is the part that receives the user’s direct operation commands through the control panel of the keys on the stovetop. But compared to the main board, the control board has a much simpler structure. The main components of the control board are the LED display and the buttons to select the cooking function.

Induction cooktop glass

Ceramic glass is the glass of choice for the design of the induction cooktop because it is scratch-resistant, impact-resistant, good-strength, and very heat-resistant.

The glass surface plays an important role in the induction cooker, it both protects the kitchen body and the components inside the kitchen. At the same time, it will help increase the aesthetics of the entire kitchen to become luxurious.

The current high-end glass that you can choose when buying an induction cooker is Schott Ceran glass from Germany and EuroKera glass from France. Because of these two types of glass, the quality is super strong and super strong. Most types of induction cookers imported from Vietnam, kitchens from Spain use this type of high-class glass.

The structure of the induction cooker will have a few differences compared to conventional cooking equipment. This is something you need to consider and should understand the structure of the induction cooker to choose the right type of induction cooker that can be easily repaired when there is a problem.

The working principle of the induction cooker

The main principle of the induction cooker is to use the Fuco series to directly heat the cooking pot. When plugged into the stove, the LC oscilloscope circuit generates a variable magnetic field on the stovetop. If there is a magnetic conductor on the stove, then in the heart of the magnetic conductor there is an internal current flowing in it, this current has a large heat-generating effect, this current is called Fuco current.

For that reason, the cooking pot must be made of ferromagnetic materials, the glass or ceramic pots cannot be used directly on the induction hob, but need an additional magnetic plate underneath. Because the pot is heated directly, the heat transfer efficiency is very high, with little heat loss. The internal circuitry uses AC – DC rectifier bridge, high frequency oscillator circuit, power control IGBT, induction coil and of course MicroController to adjust and control cooking mode.

Advantages and disadvantages of induction cookers

Advantages of induction cookers

• The induction hob works with a mechanism to transfer heat directly to the bottom of the pot, so the cooking efficiency of the stove reaches 90%, which helps you save cooking time and energy consumption for your family.
• The induction hob works without heat escaping to the outside and there is no flame, so when using it, it will not generate heat, you can cook and turn on the fan without worrying about affecting the heat of the stove.
• Induction hobs do not emit harmful gases such as CO2, no radiation, so you can completely trust using it without affecting your health.
• Using an induction hob makes cleaning easier because the cooktop is not dirty, you can clean it right after cooking.
• Induction hobs will ensure absolute safety during use because each design of the kitchen is equipped with functions of timer, keypad lock, heat alarm function, automatic shutdown when there is no pot, .. This will give you complete peace of mind when using the product

Disadvantages of induction cooker

• Using an induction cooker will pick up pots and pans, only using a single type of pot with a magnetic bottom.
• The initial investment cost is high because in addition to the cost of paying for the kitchen, you also have to spend an expense to buy a set of pots and pans for the kitchen.
• If the family has people using medical electronic devices such as pacemakers, they should not use an induction cooker because the magnetic field of the stove is not good for those devices.

Types of induction cookers

Here are some types of induction cookers that you can see at supermarkets as well as specialty stores such as:

Single induction cooker

Single induction cooker is a compact induction cooker, with only one cooking zone, can be moved easily and the maximum capacity is usually from 1800W-2200W depending on the specific design. Single induction cooker is very suitable for students, single people or those who rarely cook at home.

Double Induction Cooker

A double induction hob is a cooking device with 2 dedicated cooking zones. This device has 2 cooking zones that are both induction hobs, which will help you cook faster and save time compared to other types of kitchen appliances. In recent years, double induction cookers have become more and more familiar to Vietnamese families, gradually replacing traditional kitchen appliances.

Kitchen with 3 or more cooking zones

With a kitchen design with 3 or more cooking zones, this is a new line of equipment that has helped housewives improve their cooking much more than before. Helps increase capacity, solve difficult problems of cooking with high frequency, shorten cooking time in half. This is the bright spot that kitchen appliances from 3 cooking zones bring the most clearly.

Induction cooker

Currently, the trend of choosing negative induction cookers is to replace the old gas stoves. With the advantage of fast and clean cooking, the negative electric stove also has a modern and luxurious design that brings neatness to the kitchen.

Infrared induction cooker

Infrared induction cooker is a rectangular electric stove consisting of 2-4 ovens. One side of the oven is an induction cooker and the other side is an infrared stove. Infrared induction cooker will help your family’s kitchen increase luxury and sophistication.