Simulation And Analysis Of Temperature Field And Fire Hazard Of Electronic Heater

Electric heater is a kind of electrical products which converts electrical energy into heat energy, it brings convenience at the same time also become a potential ignition sources which cause electrical fire. Due to the fast heating and small size characteristics, electric heater become popular in millions of households. According to the industry report, heater market has remained a high growth rate in recent years. On the one hand, as a kind of ignition source, heater brings people warmth and convenience. On the other hand, there are also great security risks for heater. So it is important to make thermal analysis on the electirc heater.At present stage, with the development of science and technology, computer has a widely application and numerical methods have became the most commonly used method for temperature distribution. Compared with the traditional experimental methods, using finite element numerical simulation method on computer can greatly shorten the cycle and costs of combustion equipment experiment.Firstly according to the basic theory of thermal transmission, this paper make theoretical analysis on the heating transfer. Based on the theoretical foundation, construction, heating pipe, reflection plate and parameters are established. Through switching on the heater for 2 minutes, a highest temperature which taken from the cotton cover above the heater is compared with the simulation. According to the comparison results of experimental and simulation, the parameter settings in the simulation are corrected. Finally, the optimal parameters of the simulation are confirmed through the simulation data, which is close to the experimental data.According to above results, Ansys Icepak was used for combustible material simulation: 5mm board and cotton towel. Degree between combustible materials and 800 W heater was 0 degrees, 45 degrees and 90 degrees, distance from the heater was 0cm, 5cm and 10 cm. This simulation environment was established the same as the experiment. Then the maximum temperature of 9 cases of combustible materials was calculated. Using line graph analyzed different reasons with different fuel position, placement of the combustible material to achieve different maximum temperature and the highest temperature, flammable and combustible material fire were compared. Getting the conclusion that heater with combusitible material under distance 0cm when 0 degrees and 90 degrees can reach fuel burning. These conclusion provides a data basis for the establishment of ignition source database.