Abstract: Dual refrigeration systems for a mono-crystal furnace and methods for pulling a mono-crystal. The first heat exchange assembly includes a first heat exchange mechanism capable of exchanging heat, and a first heat exchange channel and a second heat exchange channel communicating with the first heat exchange mechanism. The second heat exchange assembly includes a second heat exchange mechanism capable of exchanging heat, and a third heat exchange channel and a fourth heat exchange channel communicating with the second heat exchange mechanism. The second heat exchange channel and the fourth heat exchange channel are communicated with a cooling assembly of a water-cooled jacket and a cooling assembly of a mono-crystal furnace, respectively. A first fluid is introduced into the first heat exchange channel. A second fluid is circulated in the second heat exchange channel, cooling assembly of water-cooled jacket, the fourth heat exchange channel, and cooling assembly of mono-crystal furnace.

Abstract: The present disclosure provides a technology field of caking of crystal particles, and in particular relates to a method for predicting a critical caking cycle of crystal particle. The method includes: establishing a CHS crystal bridge growth model database of a crystal particle with a same type of crystal particle to be predicted firstly, selecting existed data in the corresponding CHS crystal bridge growth model database based on an equivalent particle radius, a stored ambient temperature, and an environmental high and low humidity cycle condition of the crystal particle to be predicted, respectively, and calculating the critical caking cycle according to experience calculation equations, wherein a result obtained by calculation is a predicted critical caking cycle of the crystal particle to be predicted.

Abstract: The present disclosure provides a flow guide cylinder lifting assembly, including a flow guide cylinder lifting component disposed on a water-cooling lateral arm and a lifting bolt, wherein the lifting bolt is disposed in the flow guide cylinder lifting component, a lower end of the lifting bolt extends downward through an opening of an upper heat-insulating cover of the flow guide cylinder, a lifting nut is disposed at an upper end of the lifting bolt, and the lifting nut is matched to the lifting bolt to raise or lower the flow guide cylinder.

Abstract: A suspended lifting device for diversion cylinder is provided, wherein the suspended lifting device includes a lifting beam connected to a surface of a water-cooling cross arm. A groove is provided on the lifting beam, and the groove is configured to receive a lifting bolt. A positioning plate is disposed on a bottom side of the lifting beam close to the water-cooling cross arm, and the positioning plate is configured to control an angle between the lifting beam and the water-cooling cross arm.

Abstract: The present disclosure provides a water-cooled screen for improving a pulling rate of a silicon crystal, the water-cooled screen being a hollow cylinder including an inner wall surface and an outer wall surface, where at least a portion of the inner wall surface is a curved surface having a plurality of convex or concave points. The present disclosure further provides a mould for preparing the water-cooled screen.