将喷水室看作开式热力系统，根据空气与水直接接触时的热湿交换原理，分析了喷水室空气处理过程中水蒸气分子的动态变化及其所引起的热湿交换，指出目前采用的热工计算公式的不足，推导出修正后的新公式。通过实例计算，表明使用新公式有利于空调系统节能降耗 The water spray chamber is regarded as an open heat system. According to the principle of heat and moisture exchange when the air and water are in direct contact, the dynamic changes of the water vapor molecules in the air treatment process of the water spray chamber and the resulting heat and moisture exchange are analyzed. The inadequacy of the thermal calculation formula used was deduced from the revised new formula. Through example calculations, it shows that using the new formula is beneficial to the energy saving and consumption reduction of the air-conditioning system.