The development and types of electric heaters

The concept of an electric heater

An electric heater is a device that converts electrical energy into heat energy (the conversion efficiency is not necessarily 100%).

Compared with the original traditional fuel heating, it has the advantages of cleanliness, no pollution, high thermal efficiency, and convenient control and adjustment of temperature.

It is currently widely used In daily life, as electric rice cookers, electric mattresses, electric soldering irons, electric water heaters, etc. are all electric heaters.

When a current passes through a conductor, it will generate heat and convert electrical energy into internal energy. This phenomenon is called the thermal effect of current. A device that mainly uses the thermal effect of current to work is called an electric heater.

The main heating component of the traditional electric heater is the heating resistance element, but with the innovation of technology, the electric heating film is used more and more widely as the new heating element of the electric heater.

Electric heating is a basic property of a conductor, which is related to the size, material, and thickness of the current-carrying conductor. Most electric heaters are heated by heating resistor elements.

Analysis of the Development Status of the Electric Heater Market

Since the consumed electric energy is calculated according to the average electric power and usage time, as well as the convenience of measurement and calculation, the thermal calculation of the electric heater is still based on the average electric power.

In fact, sinusoidal alternating current is used in production and daily life. Therefore, the instantaneous heating rate of the heating resistance element, that is, the heat flow generated by the instantaneous electric power, also changes with time.

Electric heaters have a certain resistance value, and its resistance is selected according to the set power. The greater the power, the smaller the total resistance. The resistivity of the heating wire has an appropriate range. If the resistivity is too large or too small, a very short or very long, very thin or very thick heating wire is required, which makes it difficult to manufacture and use electric heaters of large and small powers.

According to the purpose of electrification, electric heaters can be divided into pure resistance and non-pure resistance. Among them, the purpose of a pure resistance electric heater is only for heating, and the non-pure resistance electric heater is converted into mechanical energy after electrification. Electrical appliances that dissipate heat, such as electric fans, etc., and non-pure resistance heat sinks can be divided into ordinary non-pure resistance heat sinks and special non-pure resistance heat sinks.

According to the purpose of electrification, electric heaters can be divided into pure resistance and non-pure resistance. Among them, the purpose of a pure resistance electric heater is only for heating, and the non-pure resistance electric heater is converted into mechanical energy after electrification. Electrical appliances that dissipate heat, such as electric fans, etc., and non-pure resistance heat sinks can be divided into ordinary non-pure resistance heat sinks and special non-pure resistance heat sinks.

Electric heaters are generally divided into the following four types.

1. Quartz tube electric heater

Advantages: The heating element is an electric heating wire, which is worn in a quartz tube, which can support, protect, and generate heat.

Disadvantages: The heating range is small, and it is suitable for a small room with an area of about 10 square meters. It produces light when heating, so it is not suitable for use in the bedroom.

2. Electric heating film heater

Advantages: This is a new type of material, which not only heats up faster but also dissipates heat faster. And it uses a far infrared heat delivery method, which can be said to heat up quickly.

Cons: It cannot come into contact with water, so the bathroom is not usable. There is power attenuation, the service life is short, and there is no electromagnetic shielding, which is not conducive to human health.

3. Convection heater

Advantages: meet the needs of ergonomic comfort, use the natural convection of air to exchange heat; high safety performance, quiet operation; neither dry nor dry.

Disadvantages: slow heating, poor safety, no grounding protection, and prone to electric shock accidents.

4. Ceramic heating element heater

Advantages: Good heat storage effect, more suitable for families with old people and children at home. A ceramic heater is a kind of efficient heater with uniform heat distribution. Metal alloy with excellent thermal conductivity ensures uniform temperature on the hot surface and eliminates Hot and cold spots in the device.

Disadvantages: The temperature rises slowly, and the PTC series heaters are not suitable for use in places where the environment is dirty and dusty.

Written by: FUJIREJA GROUP
The Exporter and Manufacturer of Heaters since 2003
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