Dual refrigeration systems for a mono-crystal furnace and methods for pulling a mono-crystal

A dual refrigeration system for a mono-crystal furnace, comprising a cooling assembly of a water-cooled jacket, a cooling assembly of the mono-crystal furnace, a first heat exchange assembly, and a second heat exchange assembly, wherein

• the first heat exchange assembly comprises a first heat exchange mechanism capable of exchanging heat, a first heat exchange channel and a second heat exchange channel, both the first heat exchange channel and the second heat exchange channel are communicated with the first heat exchange mechanism, and the second heat exchange channel is communicated with the cooling assembly of the water-cooled jacket and the cooling assembly of the mono-crystal furnace, respectively;
• the second heat exchange assembly comprises a second heat exchange mechanism capable of exchanging heat, a third heat exchange channel and a fourth heat exchange channel, both the third heat exchange channel and the fourth heat exchange channel are communicated with the second heat exchange mechanism, and the fourth heat exchange channel is communicated with the cooling assembly of the water-cooled jacket and the cooling assembly of the mono-crystal furnace, respectively;
• a first fluid is introduced into the first heat exchange channel and flows out therefrom;
• a second fluid is circulated in the second heat exchange channel, the cooling assembly of the water-cooled jacket, the fourth heat exchange channel, and the cooling assembly of the mono-crystal furnace;
• a third fluid is introduced into the third heat exchange channel and flows out therefrom;
• during the circular flowing process, the second fluid exchanges heat with the first fluid from the first heat exchange channel in the first heat exchange mechanism, exchanges heat with a mono-crystal furnace in the cooling assembly of the water-cooled jacket, exchanges heat with the third fluid from the third heat exchange channel in the second heat exchange mechanism, and exchanges heat with a mono-crystal furnace in the cooling assembly of the mono-crystal furnace;
• and
• the first heat exchange assembly, the cooling assembly of the water-cooled jacket, and the second heat exchange assembly, and the cooling assembly of the mono-crystal furnace are sequentially communicated through the second heat exchange channel and the fourth heat exchange channel, and are communicated from end to end.