The packaging and printing operation site is usually tall, and the building is easy to withstand the indoor environment due to exposure to heat when the weather is hot, coupled with the heat dissipation of production equipment and staff, there is a problem of poor indoor air circulation. General small fans can only be locally improved, the installation of large fans can achieve the overall air circulation of the workshop, with large air volume, three-dimensional wind to achieve all-round air flow, to achieve the purpose of human body cooling and effective ventilation of the environment. Thereby promoting productivity and indirectly improving employee productivity.