本文介绍了一种新型空调用冷却设备——封闭式冷却塔，及其工作原理和特点，在理论分析和实验研究的基础上，根据传热传质的特点，运用微积分理论，建立了冷却塔的数学模型；进而利用该模型探讨了入口空气湿球温度等因素对其性能的影响。最后，对理论计算值与实测值进行了分析比较，结果表明，理论计算值与实测值十分吻合。这种冷却塔不仅噪声低，功能多，并且能够保持冷却水不受污染，具有广阔的应用前景 This paper introduces a new type of cooling equipment for air conditioners - enclosed cooling tower, and its working principle and characteristics. On the basis of theoretical analysis and experimental research, according to the characteristics of heat and mass transfer, using the calculus theory, established a cooling Tower mathematical model; and then use the model to explore the inlet air wet bulb temperature and other factors on its performance. Finally, the theoretical and measured values ​​are analyzed and compared, the results show that the theoretical calculated value is in good agreement with the measured value. This cooling tower not only low noise, multi-function, and can keep the cooling water pollution, has broad application prospects