Structural Improvement And Experimental Studv On A Moving-Coil Liear Compressor

Compressor is the main energy consumption component in refrigeration system such as the refrigerator, however, there have a lot of disadvantages with the traditional reciprocating piston compressor, for example, the complex structure and the low mechanical efficiency. Therefore, the research and development of high efficiency compressor has been become one of today’s most urgent issues for refrigeration industry. Accompanying with the research and development of high efficiency compressor, an ideal compressor type has been applied gradually, which is the linear compressor driven by linear motor. And just because of the linear compressor, it is beneficial to the energy saving for refrigeration system. The research methods of numerical simulation and experimental test were used in this paper. In order to solve the problems of primary moving-coil linear compressor which were found in the process of designing and experiment, the moving-coil linear compressor with flexure bearings was manufactured after the further research and optimization design.According to the problem of insufficiency of driving force of primary moving-coil linear compressor, the structure parameters optimization of magnetic circuit system was made. In order to solve the calculation problem which was caused by the large mesh quantity and convergent issue when finite element model was established according to real magnetic circuit system structure of moving-coil linear compressor, a new modeling method was proposed. Based on ANSYS parametric design language, a parametric finite element model for magnetic circuit system of moving-coil linear compressor was established and the magnetic analysis was carried out. The validity and reliability of the finite element model was verified through magnetic experiment. The reason of insufficiency of driving force was obtained. The influence regularity of structure parameters of magnetic circuit system on magnetic field distribution was gained. According to the analysis results, the structural optimization design for magnetic circuit system was accomplished and reasonable schematic was achieved. In order to solve the disadvantage of mechanical system of primary moving-coil linear compressor, the design and improvement was made for corresponding structures. The mathematics model of moving-coil was given, in which some parameters were explained, such as the equivalent damping coefficient and the magnetic induction of gas gap. The solving method of mathematics model was given to provide reference for the design and improvement of mechanical system. An effective design and improvement of piston, support of piston and coilsupport bracket was created to improve the performance of the linear compressor. The influence regularity of structure parameters of flexure bearings on its performance was gained, and then the flexure bearings were designed. At last, a new moving-coil linear compressor with flexure bearings was developed.Experimental test was made to study the performance of the new moving-coil linear compressor. The experimental test platform of linear compressor was established. The magnetic induction of gas gap and energy consumption of linear motor were measured by static characteristic testing of moving-coil linear compressor. According to the experimental test without load, the voltage characteristic, the frequency characteristic, the damping loss and the valve resistance loss were analyzed. The performance standards of current, input power, flow and power consumption were obtained by the experimental test with load. The results show that the new moving-coil linear compressor is superior to the primary one.