Illumination module and projection device

A lighting module is used for providing a lighting beam and comprises a light source, a rotating wheel module and a first airflow generator. The light source provides an excitation beam. The rotating wheel module is arranged on a transmission path of the excitation light beam, the rotating wheel module comprises a plurality of driving blades, the driving blades are arranged at intervals, and any two adjacent driving blades form an airflow channel. The first airflow generator is used for generating first airflow, the first airflow flows through the airflow channels of the driving blades so as to drive the rotating wheel module to rotate, and at least one part of the light source is arranged on a flowing path of the first airflow. By means of the design, the rotating wheel module can passively rotate through the first airflow, and a driver does not need to be arranged. Due to the fact that the size of an originally-arranged driver is reduced by the lighting module, the lighting module is small in size and large