本文结合柴油机组装厂房分层空调的设计、运行实践，阐述了分层空调技术的先进性和节约能源、减少初投资的显著经济效益。设计采用了水平扩张角较大的条缝状扁喷口，有效地减少了水平射流层的漏风面积。对该喷口的应用作了简要的探讨。 Combining the design and operation practice of stratified air-conditioning in a diesel engine assembly plant, this paper expounds the advanced nature of stratified air-conditioning technology, saves energy, and reduces the significant economic benefits of initial investment. The design uses a flat slit with large horizontal expansion angle, which effectively reduces the air leakage area of ​​the horizontal jet layer. The application of the nozzle was briefly discussed.