An example of preventing electric heat hazards: the heat dissipation window behind the TV.

Electric heating is introduced as follows:

When electric current passes through a conductor, the conductor will generate heat. This kind of heat generated by electric current is called electric heat. The heat generated by electricity, the phenomenon of converting electrical energy into internal energy, is called electrothermal. Experiments have shown that when the resistor resistance and current are equal, the longer the current is energized, the more heat the current generates. Modern electric heating has developed into an industry, called the electric heating industry (also called the electric heating industry).

The types of electric heating are introduced as follows:

Metal electric heating wire type, electric heating element (0-700 degrees) PTC type, electric heating element (self-limiting temperature, self-control temperature), electric heating film Type, metal type and spray-coated type of electric heating elements. Generally, the technology of domestic metal electric heating wire type electric heating elements has reached international standards, and has created a lot of foreign exchange income for our country.

As for the PTC type due to temperature limitations, the electrothermal film type electric heating element has not been able to be solved due to the pollution problem in its production. It has been subject to many restrictions in production and cannot develop rapidly. Low temperature type (up to 100 degrees, often used for heating liquids, such as water).

The disadvantages of electric heating elements are introduced as follows:

The heated PTC thermistor has constant temperature heating characteristics. The principle is that the PTC thermistor self-heats after being powered on, causing the resistance value to enter a sudden change. area, the constant temperature heating PTC thermistor surface temperature will maintain a constant value.

Heating elements designed using the constant temperature heating characteristics of PTC thermistors. In small and medium power heating situations, PTC heating elements have the advantages of constant temperature heating, long natural life, high heat conversion rate, and are not affected by the power supply voltage. The impact is minimal, and its application in electric heating appliances has attracted more and more attention from R&D engineers. Traditional heating elements are unable to do the job.

Constant-temperature heating PTC thermistors can be made into a variety of shapes and structures and different specifications. Common ones are disc shape, square, strip shape, and ring. The combination of PTC heating elements and metal components can form various shapes. Various forms of high-power PTC heating elements. Common and practical PTC ceramic heating elements include: mosquito repellent, hand warmer, dryer, electric hot plate, electric iron, and electric soldering iron.