Device suitable for large size single crystal pulling speed accelerating and head radiation

Abstract

The invention provides a device suitable for large size single crystal pulling speed accelerating and head radiation. The device comprises a refrigeration device main body, a water inlet pipeline, anda water outlet pipeline; the water inlet pipeline and the water outlet pipeline are connected with the refrigeration device main body respectively, it is convenient for circulation flowing of coolingmedium in the refrigeration device main body; the refrigeration device main body is provided with a plurality of sight holes along the direction from a single crystal furnace cover to a crucible successively; the single crystal furnace cover is provided with an observation hole; the plurality of sight holes are arranged on the side of the refrigeration device main body opposite to the observationhole, so that it is convenient to observe single crystal growth. The beneficial effects are that: the plurality of sight holes are adopted, so that it is convenient for observation of single crystalgrowth; with a crystal crystallization region temperature ensured to be at a silicon crystallization point temperature, crystal surface heat energy loss is accelerated, crystal axial temperature gradient is increased, and single crystal pulling speed accelerating is promoted.

Description

technical field [0001] The invention belongs to the technical field of photovoltaics, and in particular relates to a device suitable for lifting and cooling large-size single crystals. Background technique [0002] In order to match the high-power product requirements of module power plants, there is a requirement for a larger size of single crystal at the crystal end. Pulling 11-inch and 12-inch large-size single crystals, due to the larger diameter, the heat dissipation is slower than conventional small-size single crystals, resulting in low single crystal pulling speed and slow heat dissipation, and a long cooling time for single crystals, which affects single crystal pulling. Control the effective working hours and affect the cost. [0003] The existing water-cooling system is designed at 100-300mm above the single crystal. In order to avoid blocking the line of sight, the super-powerful water-cooling generally has a narrow tapered structure at the bottom of the above p...

AI Technical Summary

Problems solved by technology

Pulling 11-inch and 12-inch large-size single crystals, due to the larger diameter, the heat dissipation is slower than conventional small-size single crystals, resulting in low single crystal pulling speed and slow heat dissipation, and a long cooling time for single crystals, which affects single crystal pulling. Control effective working hours and affect costs

[0003] The existing water-cooling system is designed at 100-300mm above the single crystal. In order to avoid blocking the line of sight, the super-powerful water-cooling generally has a narrow tapered structure at the bottom of the above paragraph. The water-cooling system is far away from the single crystal due to the wide tapered structure at the top. The effects of crystal heat dissipation and pulling speed are weakened

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