中文版    |    English
News
News >> Electric film to warm to a firm market must continue to innovate

Used in the construction of electric film heating more than ten years of history in the West, but mixed. The technology introduced into China, for many years to promote improvement since 1999 Harbin, a construction development company is the first to use point demonstration, only gradually in Liaoning, in particular, Dalian and other places began to apply. Based on the introduction of foreign products Kaile Rick and France (U.S. Nevo brand products), the country's products have been listed on the Shanghai Sanmeng and large chain reached, Dalian Husseini and other similar products of several enterprises and performance installing and supporting technically inferior to foreign products, but imitate the West, did not consider the condition of our country. After the introduction, digestion, absorption, electric film in the the building heating market on the road in order to take a good, must be innovative, to go its own way.
Electric film is it?
Short, electric film is the thickness of the thin electric plastic three-tier structure, the middle layer of the heating element, the upper and lower layers polyester film with flame-retardant and insulating properties, has played the role of sealing and protection.
The electric membrane by the two parts of the heating element and an infrared radiating body composition. Can be broadly divided into two categories, a conductive ink, about to stone the toner or silver conductive powder evenly mixed in the ink made of conductive ink printed on a polyester film strips, fever energized. The main body of this heating element is ink, such as the United States, Keller Rick electric film and domestic Shanghai Sanmeng electric film; other metal (alloy) thin film strips, fever after power, such as France Nepal Waugh the electric membrane and country products chain up to Husseini electric film.
These two types of electric film, from the polyester film of the far infrared through the spectra can be seen (Figure 1) band in the 6.7 to 1 μm, the transmittance is 0. Electric film surface temperature is only about 35 ~ 40 ℃, the radiation peak wavelength should be about 9μm, we can conclude that, in 7 ~ 10μm band. Since infrared transmittance of the polyester film is 0, then the heating element in the band of the infrared radiation are polyester film for absorption, and then the electric film, from the heat transfer mechanism can be regarded as indirectly heated and direct-thermal kinds of heat transfer mode superposition, but the performance of the infrared radiation is determined mainly by polyester film, basically nothing to do with the the intramembranous infrared radiation material.
Currently, the installation of the electric membrane installation methods is the introduction of foreign, that is embedded in the electric film is mounted on the ceiling, the structure, the top insulation layer, followed architecture, electric film and gypsum board, and finally brushing a layer of gypsum board surface architectural coatings. This, in fact, is the electric film itself direct thermal and next to the heat combined with radiation performance change became plasterboard heating element next to thermal heating mechanism, the actual performance infrared radiation from the surface of the gypsum board Architectural Coatings performance to determine, lost originally has a certain amount of infrared radiation effect, the electric film in this case is equivalent to a general electric heating body. To ask this, so installation of ink type or structure of the metal strip heating film, infrared radiation coating, there is little practical significance? There are, at all times, brazier, kang, stoves, fireplaces, heaters and other heating equipment in the living room below Why unique electric film to security in the ceiling? Furthermore, this method of installation belonging to the "inverse convection heat transfer, not only a large thermal resistance, heat loss, and on to compete at room temperature is low. The temperature gradient, giving up under a "cool" feeling uncomfortable. It can not be changed to the side wall of the installation? Originally infrared radiation accounts for the proportion is not large electric film, have to use gypsum board covering this? Can gap ornaments instead?
All things grow by the sun, mainly infrared sunlight. Long-term but not the sun, because of the lack of infrared irradiation will become extremely emaciated. Not seen sunlight for plants, the branches are not strong, the leaves do not mao false fruit. Winter fruit and vegetable greenhouses in the cultivation of fruits and vegetables, due to lack of infra-red chili is not spicy, unsweetened strawberries, cucumber and a bit damp, tomatoes evil acid.
Nearly 20 years to appear in the medical and health care products on the market a variety of treatment, physical therapy equipment, infrared irradiation function significant inflammatory disease efficacy for chronic pain and classes become ideal family care physicians.
Therefore, people said "green heating" and "green care" system from the results of the infrared radiation. Well, what kind of heating can be considered "green heating equipment?
In theory, the heat is transferred in three ways, namely conduction, convection and radiation. Technically, these three ways in general can not be absolutely separated mainly on saying what kind of heating method for heating mode of heat transfer. 100% heat transfer by a heat transfer heating is non-existent. If you call it a green heating, heat transfer by infrared radiation heat transfer to the main. Accordance with the provisions of the national standard GB8623-88, the conversion efficiency of the infrared radiation should be> 50%, and that more than half of infrared radiative transfer heat, while the sum of the heat transfer by conduction and convection <50%. Strictly speaking (in theory), objects larger than any absolute zero (-273 ℃) infrared radiation from the sky, the water swim, run on land as well as all of our lives around objects, such as the human body (not radiation performance Asian electric film), earth, plants as well as in-room walls, floors, furniture, clothing, etc., also including traditional radiators, stoves, kang, a warm wall, fireplace, which does not radiate infrared, but can not because all infrared radiation, are referred to as "infrared radiator (product). Boiler heating radiator, when the surface temperature is about 90 ℃, especially the surface oxidation rusty radiator, its infrared radiation exitance (the surface radiated power density) is equivalent to more than twice that of the electric film Why do not you call infrared radiation radiator? Because it is not mainly infrared radiation heat transfer, but "the main convective heat", so called convective heat heating mode.
The surface temperature of the human body electric film, are about 37 ℃, although the presence of infrared radiation, can be referred to as "infrared radiation or infrared radiation heating film"? "Green heating effect and we talk about it? Then plasterboard cover the effect of infrared radiation and how to achieve it? Must be innovative, take China's own way
Electric film heating technology introduction, digestion, absorption, it is imperative innovation, or will soon be eliminated abolished.
The innovative main points are as follows:
(1) to change the ceiling mounted sidewall installation. Easy to understand, sidewall installation has many advantages: (1) the use of safety, not flooded; ② easy maintenance; ③ easy residents decoration; ④ upper and lower temperature difference is small, that the temperature gradient; ⑤ reduce heat loss, energy-saving and not The ceiling was blackened caused due to the "inverse convection. As for the side-mounted, caused the furniture block heat, "said, just unfounded imagine.
(2) the use of bare installation. Traditional gypsum board to get rid of the band gap instead of ornaments, both beautiful, but also make the the electric film itself infrared radiation directly to the living room.
(3) increase the infrared radiation of this is to improve the electric film to the whole firing rate.
Test comparing the existing domestic and international electric film products emission rate based on the study with high radiation performance electric film infrared radiation layer (material) is to improve the "green heating effect" of the electric film.
(4) its infrared emissivity study a new type of architectural coatings improved imperative.
With the application of electric heating film technology, the technology promotion process derived industry - the research and production of infrared architectural coatings, is bound to someone who is willing to do, that the existing architectural coatings by changing the formula to improve the infrared emission. The birth of the architectural coatings products, and a green heating function, the market is not a small amount.