Air flow guiding device for ingot furnace

Abstract

The application discloses an air flow guiding device for an ingot furnace. The air flow guiding device is arranged at an opening in the lower part of a straight-cylinder air flow passage, and comprises a first connecting part which is connected with the opening in the lower part of the straight-cylinder air flow passage and surrounds the straight-cylinder air flow passage; the main body of the first connecting part is a cylinder of which the diameter is greater than that of the straight-cylinder air flow passage, and comprises a first side surface of which the diameter gradually shrinks from the top to the bottom; small through holes are formed in the first side surface; a big through hole is formed in the bottom surface of the first connecting part. Through the adoption of the small through holes, the cross sectional areas of air guiding holes are reduced, so that air flow rate can be increased; the small through holes are formed in the first side surface of which the diameter gradually shrinks from the top to the bottom, so that the leading-out direction of air flow can be changed to expand the air flow all around, the cover area of the air flow can be increased, impurity gas can be fully discharged, and the casting quality is improved.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to an airflow guiding device for an ingot furnace. Background technique [0002] When using an ingot furnace to manufacture polysilicon crystals, it is necessary to feed argon gas as a protective gas to prevent oxidation of various components in the furnace and take away volatile impurity gases in the furnace. Among them, the argon gas enters the top of the ingot furnace and passes through the straight graphite cylinder, then through the straight cylinder-shaped air flow outlet, and is exported to the upper part of the silicon material, and then passes through the ingot casting furnace air grate to the outside of the furnace. The internal impurity gas is taken away. [0003] However, the current method of directly exporting the airflow through the straight cylindrical port has the disadvantages of slow airflow velocity, small surface area of ​​the exported gas covering the si...

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Problems solved by technology

[0003] However, the current method of directly exporting the airflow through the straight cylindrical port has the disadvantages of slow airflow velocity, small surface area of ​​the exported gas covering the silicon material, and easy formation of turbulent flow, etc., resulting in insufficient discharge of impurity gases, especially with the The size is getting bigger and bigger, and the airflow coverage area and flow rate are getting less and less

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