【作者】 金听祥； 李改莲； 崔严鹏； 成剑； 郑祖义；

【Author】 Jin Tingxiang1, 2,Li Gailian1, Cui Yanpeng2,Cheng Jian2, Zheng Zuyi2 (1. School of Mechanical & Electricity Engineering,Zhengzhou University of Light Industry, Zhengzhou, 450002;2. Guangdong Chigo Air-Conditioning Co., Ltd, Nanhai, 528244)

【机构】 郑州轻工业学院机电工程学院； 广东志高空调有限公司；

【摘要】 本文对变频空调的制冷剂流量变化和换热器的换热过程进行了理论分析,并试验研究了压缩机频率、电子膨胀阀开度和室内负荷变化对变频空调系统性能和COP的影响。结果显示:变频空调在一定频率下运行时,随着电子膨胀阀开度在一定范围的增大,系统制冷能力和COP的变化曲线呈抛物线形状。当电子膨胀阀开度固定时,在变频空调能满足制冷负荷的情况下,应使压缩机在尽可能低的频率下运行,可以使系统的制冷能力和COP达到最佳,以达到节能效果。变频空调系统的制冷能力和COP会随着冷却负荷的变大而降低。更多还原

【Abstract】 In this paper, mathematical model of inverter air conditioner was developed to analyze the variation of mass flow and heat transfer of evaporator (condenser). A parametric study was conducted with variation of the compressor operating frequency, cooling load and the opening area of the EEV. The experimental results show that the COP and system capacity variations at constant operating frequency are of parabolic shape by increasing the EEV openings. At the fixed EEV openings, the operating frequency of the variable speed compressor should be the lowest frequency to get the optimum COP within the variable range of the compressor operating frequency when the system capacity matches the imposed cooling load. The COP and system capacity decrease with the increment of cooling load.更多还原