Daimler-Benz Motors, one of the world's largest multinational manufacturers of commercial vehicles. ARKREF provides refrigeration equipment for its experimental chamber integrating refrigeration, heating, and humidification, which has extremely high requirements for refrigeration systems and control systems.

This project is an experimental chamber integrating refrigeration, heating, and humidification. The three accuracy requirements are very high. Due to the small space of the environmental chamber, in some cases, cooling and heating are performed at the same time to maintain the temperature.Under the specified temperature, the requirements for the refrigeration system and control system are extremely high.