Overcooler

After leaving the quencher, the mixture entered the overcooler.

From under the bath lid, gaseous nitrogen is withdrawn through the liquid nitrogen overcooler 7 into the gaseous nitrogen line 5 for compression and reuse.

Also, an overcooler is provided inside the outdoor unit. The overcooler is an overcooling means for cooling down even more the coolant heat-exchanged at the outdoor heat exchanger which will be described below.