Industry information

In the "family" of household heaters, the use of the electrothermal electric heater mica heating tablets, has been popular in the market at home and abroad for many years, has been praised by consumers love. For this kind of electric heater, it is the heart of the electrothermal film mica heating tablets, can also be referred to as the core technology. Whether the electrothermal mica heating tablets for what? And what are the categories? The emphasis on the below.

 

In fact, due to the electric heaters are sought after by the market, the market should also has given rise to a variety of electrothermal film mica heating tablets, are all kinds of heating element manufacturers dubbed "electrothermal film mica heating tablets", creating a good and bad are intermingled, the situation of the sham as the genuine, and application of the finished product manufacturer to bring certain misleading to consumers, and even cause some misunderstanding of the electrothermal technology

 

1) alloy heating wire winding type electrothermal film

 

Since 1893, has been widely used so far, is the traditional way of heating. Because the heating wire is linear heat source, heat dissipation area is lesser, heat radiation wave in three-dimensional diffusion, part of the electrical energy is converted into light energy, is a strong flame. Based on the energy conservation law, the power conversion efficiency is only 60% to 70%. Temperature rise of up to 1100 ℃, the heating wire is easy to break, seismic performance is poor.

 

Heating wire is used pressure, delay, pull and stretch into electric wire, electric heating rods, electric heating plate, electric leaf, etc., but can not be cut to use at work. Heating wire production technology has been very mature, supporting the production of household appliances, more for low-end products, competitiveness is low. Some heating wire form a complete set of home appliances, has been difficult to get into Europe and the United States and other high-end market.

 

(2) carbon film mica electrothermal board

 

Carbon film with belongs to the category of electrothermal film, is organic opaque electrothermal film. The organic composition of electrothermal film and polymer electrothermal film and adding type electrothermal film. More practical application is currently in film-forming material adding carbon black, graphite, or both mixing, commonly known as black membrane. The membrane technology used for coating and screen printing. Most of the electrothermal film and use to the carrier, the carrier materials of application more is glass, ceramics, mica and so on.

 

Carbon film mica electrothermal board has the following disadvantages:

 

1. Physical security performance. Since the making craft of black film is coated with silk screen printing on the surface of insulating base material, so is one of the thickest in the electrothermal film, thickness of 0.3-0.5 mm. Due to the film and mica layer after the heat expansion coefficient is different, after repeated heating cooling, eventually in membrane layer with bubbles formed between mica substrate, lead to membrane layer is easy to fall off.

 

Can't do big 2. The power density, high capital cost. Monolithic power density generally below 0.5 W per square centimeter, the surface temperature can reach 200 degrees, which requires the manufacturer to do power heater appearance size have to do is very big, the cost increase.

 

3. The tin oxide electrothermal film mica electrothermal board

 

Tin oxide is conductive film with composite sintering and conductive coating surface coating processing, in the gas phase state, the tin oxide through high temperature spitting and composite sintering processing and into.

 

Tin oxide electrothermal film mica electrothermal board 1. It is because of the tin oxide and cloud the motherboard is sintered, current is flowing through the tin oxide layer and fever, but the quality mica sheet mica agglutination, fine crystal organization structure is not tight and firm, between plasticity and toughness is low, there are some loose, especially along with the continuous heat bilges cold shrink, fine mica crystals will form a small gap between organizations, these subtle gap is great obstacle to the current circulation, directly lead to burn out.