Dual-pipeline switching gas-filling device of polycrystalline ingot furnace and control method thereof

Abstract

The invention provides a dual-pipeline switching gas-filling device of a polycrystalline ingot furnace and a control method thereof. The dual-pipeline switching gas-filling device comprises a first hand valve, a first hand valve, a third hand valve, a first flowmeter, a fourth hand valve, a fifth hand valve, a second flowmeter, a main gas channel and an auxiliary gas channel; the first hand valve, the second hand valve and the third hand valve as well as the first flowmeter are connected in series and mounted on the main gas channel; one end of the main gas channel is communicated with an argon tank, while the other end of the main gas channel is communicated with the ingot furnace; the fourth hand valve, the fifth hand valve and the second flowmeter are connected in series and mounted on the auxiliary gas channel; one end of the auxiliary gas channel is connected to the main gas channel between the first hand valve and the second hand valve, while the other end of the auxiliary gas channel is connected to the main gas channel between the third hand valve and the ingot furnace. The dual-pipeline intake switching pressure-maintaining device is adopted, and capable of automatically switching the auxiliary gas channel to supply gas into the ingot furnace, and no influence is caused on the production.

Description

Technical field: [0001] The invention relates to a polycrystalline ingot casting furnace intake pressure maintaining device, in particular to a polycrystalline ingot casting furnace double-pipe intake conversion pressure maintaining device. Background technique: [0002] In the field of solar cell technology, polycrystalline ingot casting is an indispensable and important link, that is, polycrystalline silicon ingots are cast from polycrystalline raw materials in a polycrystalline ingot casting furnace. The polycrystalline ingot casting furnace must ensure the pressure in the furnace during operation. In order to ensure normal operation and the output of good ingots, a flowmeter is installed at the argon gas inlet to judge the pressure in the furnace, and to adjust the flowmeter to maintain the balance of the pressure in the furnace. [0003] Most manufacturers using polycrystalline ingot casting furnaces use a single gas path for gas supply. If the flow meter is damaged, th...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems caused by single gas path gas supply in production, the purpose of the present invention is to overcome the technical defects of existing equipment and provide a double-pipe conversion gas charging device for polycrystalline ingot furnace, which can be repaired when the flow meter is damaged During maintenance, argon gas can still be filled into the furnace quantitatively to maintain the pressure in the furnace, without shutting down the furnace, saving resources and reducing costs

Images