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A solid-liquid interface measuring device for silicon ingot furnace

A technology of silicon ingot furnace and solid-liquid interface, which is applied in the field of solid-liquid interface measuring devices and devices for measuring the depth of molten silicon. The effect of low manufacturing cost and accurate measurement structure

Inactive Publication Date: 2017-06-06
镇江荣德新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this method, it is necessary for the surveyors to frequently go to the top of the ingot furnace to read the position of the quartz rod on the scale, and to keep an eye on the movement of the quartz rod so as to read the value on the scale in time. Labor-intensive and difficult to guarantee measurement accuracy

Method used

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  • A solid-liquid interface measuring device for silicon ingot furnace
  • A solid-liquid interface measuring device for silicon ingot furnace
  • A solid-liquid interface measuring device for silicon ingot furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0046] like Figure 1 to Figure 3 As shown, the solid-liquid interface measuring device for a silicon ingot furnace of the present invention includes: a quartz rod 1, a cylinder 2, a driving device 3, a pressure sensor 4 and a PLC 6, and the quartz rod 1 is vertically arranged for contact with the silicon ingot furnace. The solid polysilicon in the ingot furnace is contacted to detect the height of the solid polysilicon, that is, the depth of the molten silicon material in the silicon ingot furnace, figure 1 The silicon ingot furnace is not shown in the figure, only the upper cover 14 of the silicon ingot furnace is shown, and the quartz rod 1 extends into the silicon ingot furnace from the opening of the upper cover 14 . The first piston rod 24 of the cylinder 2 is always in an extended state, and the first piston rod 24 is connected with the quartz rod 1 . The driving device 3 is used to drive the cylinder 2 to move linearly up and down. Since the quartz rod 1 is fixedly co...

Embodiment 2

[0066] like Figure 4 and Figure 5 As shown, the difference between the second embodiment and the first embodiment is only that the cylinder is different. The cylinder 2 of the present embodiment adopts a secondary protection cylinder, and one side of the piston 23 of the cylinder 2 is connected to the first piston rod 24 connected to the quartz rod 1 , the other side of the piston 23 is connected with a second piston rod 25 , and a position sensor 13 is arranged on the second piston rod 25 or on the cylinder body 22 .

[0067] The setting of this embodiment is to prevent the pressure sensor 4 from sensing a sudden change when the lower end of the quartz rod 1 detects a solid-liquid interface when the pressure sensor 4 is no longer sensitive to pressure after being used too many times or the pressure sensor 4 fails. Force, the driving device 3 does not drive the quartz rod 1 to move upwards. At this time, the quartz rod 1 will move upwards under the reaction force of solid p...

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Abstract

The invention discloses a solid-liquid interface determination device for a silicon ingot furnace. The solid-liquid interface determination device comprises a quartz rod, a cylinder, a driving device, a pressure sensor and a PLC (programmable logic controller), wherein the quartz rod is used for being in contact with solid polysilicon in a silicon ingot furnace; a first piston rod of the cylinder is in a extending state and is connected with the quartz rod; the driving device is used for driving the quartz rod to make a rectilinear motion in the vertical direction; the pressure sensor is mounted between the first piston rod of the cylinder and the quartz rod and is used for sensing an acting force generated by the contact between the quartz rod and the solid polysilicon; and the PLC is electrically connected with the driving device and the pressure sensor respectively, and is used for receiving signals collected by the pressure sensor and controlling the driving device to drive the quartz rod to ascend or descend according to the received signals. The solid-liquid interface determination device for a silicon ingot furnace is simple in structure, low in manufacturing cost, convenient to use and accurate in measuring structure, and can automatically obtain depth of molten silicon in the silicon ingot furnace without requiring measuring personnel to manually insert the quartz rod into the silicon ingot furnace and read frequently, thereby relieving the measuring personnel.

Description

technical field [0001] The invention relates to a solid-liquid interface measuring device for a silicon ingot furnace, in particular to a device for measuring the depth of molten silicon for a silicon ingot furnace, and belongs to the technical field of silicon ingots. Background technique [0002] Solar cells are used to convert light energy into electricity (photovoltaics). According to the different materials used, solar cells can be divided into: 1. Solar cells made of amorphous silicon, polycrystalline silicon and single crystal silicon; 2. Solar cells made of III-V compound semiconductors such as GaAs, Inp and other multi-component compounds. battery; 3, with copper indium selenide (CuInSe 2 ) Solar cells produced from materials; 4. Solar cells produced from other materials. The general requirements of solar cells for materials are: 1. The crystal band of the semiconductor should not be too wide; 2. It must have a high photoelectric conversion efficiency; 3. The mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/18C30B28/06C30B29/06C30B11/00
Inventor 路景刚戴雪松
Owner 镇江荣德新能源科技有限公司
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