Research On Thermal Property Analysis And Test Method Of Electrothermal Household Appliances

Electrothemal household appliances transform electrical energy intothermal energy for daily life. Thermal property is the most important performanceindex of electrothermal household appliances，which directly affects the quality andsecurity performance. Because of the great varieties of the products and the efficientprogress of the market, studies on design and test methods of thermal structuresbecome necessary. In this paper, an analysis and test method for electrothermalhousehold appliances is proposed to deal with the problems about the influencingfactors and test methods of the thermal performance and on-line regulating. Takingelectric iron for instance, analyses and experiments are carried out.First, the influencing factors of electrothermal household appliances thermalperformance, test methods and on-line regulating methods are summarized. And thetheory related to the research is discussed, including the characteristics of heattransfer and temperature control property, heat transfer model of electric irons. Basedon ANSYS, temperature field model of electric iron is constructed, and thermalperformance indices are derived. The influences of the thickness, material, heat flowand environment are discussed. Considering the actual demands, thermal performanceindices are compared by the different structure.Secondly, a test method of electrothermal household appliances thermalperformance is introduced for verification of analysis results. Combining the contactand non-contact measurement of the temperature, the thermal performance testsystem for electrothermal household appliances is designed. And some amendmentsuggestions of current standards are propounded.Then, according to the problem of temperature calibration errors on theproduction line, a method to improve the accuracy of the on-line temperaturecalibration is put forward, and the on-line temperature detection system is designed.Based on the system, the framework, hardware design and software program are elaborated.Finally, the results of thermal property analysis are verified by the thermalperformance test system, error analysis of the model and a revised scheme areproposed. The electric iron on-line regulation is reformed by the on-line temperaturedetection system, in order to improve the accuracy of temperature regulation and theefficiency of production.