本文研究影响空调机部分负荷特性的因素，并根据季节性能系数ＳＥＥＲ的提出，分析压缩机容量调节的必要性。通过试验方法研究两种调节方式－速度调节和浓度调节的原理和方法。试验结果表明两种调节方式都可达到较好的调节效果，而在中小型设备中浓度调节具有更大的节能潜力。 In this paper, the factors affecting the partial load characteristics of air conditioners are studied. According to the SEER, the necessity of compressor capacity regulation is analyzed. Through the test method to study two adjustment methods - speed regulation and concentration regulation principle and method. The test results show that both the adjustment methods can achieve better adjustment effect, while the concentration adjustment in small and medium-sized equipment has greater energy saving potential.