The development process, main technical pa-rameters, structure features and onboard applicatious of DF11 ZK4.5 diesel locomotive cab DC air condilioning sets are de-scribed.

• 介绍了DF11ZK4.；5型内燃机车司机室直流空调机组研制过程、主要技术参数、结构特点和装车运用情况。