Start-up Characteristics of Linear Compressors in a Refrigeration System  

作　　者：ZOU Huiming LI Xuan TANG Mingsheng TIAN Changqing 

机构地区：[1]Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Thermal Science》2021年第2期598-609,共12页热科学学报（英文版）

基　　金：We would like to thank the support from the National Natural Science Foundation of China(No.51576203 and No.51976229);this study is also supported by CAS Key Laboratory of Cryogenics,TIPC(No.CRYOQN201908);Dr.Tang M.S.is supported by Youth Innovation Promotion Association,CAS(No.2018032).

摘　　要：This work investigates the start-up characteristics of linear compressors in a refrigeration system through experiment and simulation.Experiments are carried out by a refrigeration test system with a linear compressor controlled by a LabVIEW platform.A simulation model that considers the nonlinear process of gas force is set up on the basis of Runge-Kutta method for linear compressors.Compared with the experimental results,the simulation errors are within 15%,including the unstable state.The influences of ambient temperature and power frequency on linear compressors are studied through experiments.Unstable phenomena exist at 25℃ ambient temperature compared with the designed ambient temperature of 35℃.The unsteadiness mechanism is analyzed by simulation.Simulation analysis indicated that two sensitive stages of linear compressors,namely,starting to pump and touching top dead center,are unstable.Furthermore,properly increasing equivalent mass (approximately 3%) or spring stiffness doring the design stage can be a practical method to improve the stability of linear compressors.

关 键 词：linear compressor START-UP dynamic characteristics UNSTEADINESS 

分 类 号：TB65[一般工业技术—制冷工程]