A combined environmental test chamber can be used on ground vehicles and also in the air or at altitude, to see what faults temperature, humidity and vibration acting together may produce. Its cooling system uses a few technologies worth noting.
Single-compressor auto-cascade
The cooling system applies a temperature-balance technology: a single-compressor auto-cascade system. By varying the refrigerant and the evaporating temperature, it changes the cooling effect of the refrigerant and delivers refrigeration from a single compressor. Compared with two-stage cascade refrigeration, this approach reduces compressor noise, extends service life and lowers both operating and electricity costs.
Vibration control on the piping
The cooling system adds arc bends to reduce copper-tube deformation caused by vibration and temperature change, and uses compressor rubber mounts and spring dampers so that the refrigeration piping does not crack.
Energy-saving control
The system also uses other energy-saving technologies, such as VRF control based on PID+PWM and a grouped-compressor design. The grouped design starts and stops compressors automatically according to the load condition.