Abstract: There are important applications of low temperature refrigeration function in some special scenarios such as equipment heat dissipation in winter. Through the research and analysis of outdoor ambient temperature, outdoor fan speed and wind baffle, the research shows that the refrigeration capacity, condensation pressure and evaporation pressure will decrease with the decrease of outdoor ambient temperature. Within a certain range, the performance of low temperature refrigeration can be improved by reducing the speed of outdoor fan, and the performance of low temperature refrigeration can be improved rapidly with the decrease of speed of outdoor fan. The installation of the wind baffle can also improve the performance of low temperature refrigeration, condensation pressure and evaporation pressure. By reducing outdoor fan speed and installing the wind baffle, it can substantially improve the performance of low temperature refrigeration.

Key words: Low temperature refrigeration, Outdoor fan speed, Condensation pressure, Wind baffle