| 摘要: |
| 本文针对直线压缩机的喷射补气特性开展研究，基于直线压缩机电磁学模型、动力学模型和小孔进气模型，建立了喷射补气式直线压缩机及压缩腔仿真模型并进行了实验验证，研究了补气压力和参数调节对压缩机运行参数的影响。结果表明：喷射补气使吸气阀滞后开启和提前关闭，低压吸气量减小，排气量增大。在吸气压力为62.5 kPa、排气压力为765 kPa条件下，补气压力为200 kPa时，吸气量降低61%，排气量提升50%；补气压力为400 kPa时，低压无吸气，排气量相比于200 kPa补气时提升60%。给定供电参数条件下，喷射补气使自由活塞行程、偏移量与余隙容积增大，固有频率有一定的提高；定余隙容积运行时，随着补气压力的提升，气体力等效刚度和等效阻尼均增大。固定频率下，行程增大时吸气量随之增大，而补气流量达一定值后基本保持不变；频率调节时，压缩机在固有频率附近吸、补气量存在最大值，驱动频率较高时补气对吸气量的降低影响减弱。 |
| 关键词: 直线压缩机 喷射补气 模拟 变参数 泵气量 |
| DOI： |
| Received:November 11, 2021Revised:December 22, 2021 |
| 基金项目:国家自然科学基金（51976229）资助项目。 |
|
| Performance Analysis of Linear Compressor with Vapor Injection |
|
Li Xuan1,2, Zou Huiming1,2, Tang Xinbin1,2, Tang Mingsheng1, Tian Changqing1,2
|
| (1.Key Laboratory of Science and Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences;2.University of Chinese Academy of Sciences) |
| Abstract: |
| In this study, the characteristics of a linear compressor with vapor injection (VI) were investigated. A model of a linear compressor with VI validated by the experiment was proposed to explore the effects of VI pressure, piston stroke, and driving frequency on the operating parameters. The results showed that the VI caused delayed opening and early closing of the suction valve. Under the rating condition, when the injection pressure was 200 kPa and 400 kPa, the mass flow rate of suction decreased by 61% and 100% (to zero), and that of discharge increased by 50% and 60%, respectively. Under constant electrical parameters, the stroke, offset, clearance, and resonant frequency of the free-piston increased with increasing injection pressure. Both the equivalent gas spring stiffness and gas stiffness increased with increasing injection pressure at constant clearance volume. For an increasing piston stroke, the mass flow rate of suction increased, while that of injection increased and then remained constant. When the compressor operates close to the resonant frequency, both the suction and injection mass flow rates reached their respective maxima, weakening the effect of injection on the decline of suction flow rate at high operating frequencies. |
| Key words: linear compressor vapor injection simulation variable parameters pumping parameters |
