The wine temperature in the finished wine workshop of CHANGYU is -4°C, and it needs to be heated to room temperature when flowing to the filling workshop, while the wine from the original wine center is at room temperature and needs to be cooled down. The Company uses a plate-type heat exchanger to realize the heat exchange between low-temperature wine and room-temperature wine, achieving the effect of cooling the room-temperature wine and heating the low-temperature wine. The heat generated by the air compressor providing power is also used to heat the low-temperature wine through water heating, and the used water is also used for machine cleaning.