CN212103062U - Ingot furnace - Google Patents

Abstract

The utility model provides an ingot furnace, it includes: the crucible, locate crucible backplate all around, locate heater and the lid in backplate periphery are located the backplate with the apron of crucible top, the apron includes the roof, from the vortex strip of roof downwardly extending and from the backup pad of roof four corners downwardly extending, the backup pad with the top surface contact of backplate. The utility model discloses an ingot furnace sets up the vortex strip through the below at the apron for gas outlet that gas in the ingot furnace can be fast through the backplate is discharged, prevents the gas reflux, and then reduces the content of oxygen, carbon impurity in the silicon melt.

Description

Ingot furnace

Technical Field

The utility model relates to a photovoltaic production field especially relates to an ingot furnace.

Background

In recent years, solar photovoltaic power generation has been developed rapidly as a clean and efficient renewable energy technology. At present, silicon crystal materials are mainly used for solar photovoltaic power generation, the demand of the silicon crystal materials in the field of solar batteries accounts for more than half, and the quality of a silicon wafer is directly related to the quality of the solar photovoltaic battery.

The cover plate in the polycrystalline ingot furnace is an important part of the polycrystalline ingot furnace, is generally of a plane structure and is placed on the crucible protective plate. The cover plate may block contaminants in the polycrystalline ingot furnace from entering the silicon melt and affecting ingot quality.

Due to the plane structure of the cover plate, the air can be exhausted only through the opening of the guard plate, and the exhaust flow is small. In addition, only a small part of the gas is discharged from the opening of the shield plate, and most of the gas flows back to the liquid level of the silicon melt. The above would result in that the generated silicon monoxide and carbon monoxide gas cannot be discharged in time, increasing the possibility that they enter the silicon melt, causing the content of carbon and oxygen impurities in the crystalline silicon to increase, and affecting the quality of the crystalline silicon.

Therefore, it is necessary to design an ingot furnace to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a help reducing the ingot furnace of oxygen, the content of carbon impurity in crystalline silicon.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an ingot furnace, comprising: the crucible, locate crucible backplate all around, locate heater and the lid in backplate periphery are located the backplate with the apron of crucible top, the apron includes the roof, from the vortex strip of roof downwardly extending and from the backup pad of roof four corners downwardly extending, the backup pad with the top surface contact of backplate.

As a further improved technical scheme of the utility model, vortex strip perpendicular to the roof, and be close to the roof edge sets up, in vertical direction, vortex strip is not less than the top of backplate.

As a further improved technical scheme of the utility model, the roof with the difference in height of backup pad with the height of vortex strip is the same.

As a further improved technical scheme of the utility model, the vortex strip is including enclosing four square strakes, every strake respectively with one side of roof is parallel.

As a further improved technical solution of the present invention, the inner angles of the supporting plates are respectively connected to the edge strips.

As the utility model discloses further modified technical scheme, the side middle part of roof is equipped with recessed mounting panel, the mounting panel with the top surface contact of backplate.

As a further improved technical scheme of the utility model, the mounting panel is square, has seted up the mounting groove on it, the mounting panel is located the regional outside that the vortex strip encloses.

As a further improved technical scheme of the utility model, the apron is the integrated into one piece structure, a plurality of gas outlets have been seted up at the upper portion edge of backplate.

As the utility model discloses further modified technical scheme, the height of strake is 40mm to 50mm, the length of strake is 800mm to 820mm, the thickness of strake is 3mm to 5 mm.

As a further improved technical solution of the present invention, the distance between the edge strip and the top plate edge is 130mm to 150 mm.

According to the technical scheme provided by the utility model, the ingot furnace sets up the vortex strip through the below at the apron for gas in the ingot furnace can discharge through the gas outlet of backplate fast, prevents the gas reflux, and then reduces the content of oxygen, carbon impurity in the silicon melt.

Drawings

Fig. 1 is a perspective view of the ingot furnace of the present invention.

FIG. 2 is a side view of the ingot furnace of FIG. 1.

Fig. 3 is a perspective view of the cover plate of fig. 1.

Fig. 4 is a perspective view of the cover plate of fig. 1 in another direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the present invention provides an ingot furnace 100, which includes a crucible (not shown) for placing silicon material, a protection plate 1 disposed around the crucible, a heater (not shown) disposed at the periphery of the protection plate 1 for heating and melting the silicon material, and a cover plate 2 covering the protection plate 1 and the crucible.

The upper edge of the guard plate 1 is provided with a plurality of air outlets 11, and convex parts 12 are arranged between the air outlets 11. The number of the air outlets 11 is preferably two. A plurality of mounting holes 13 are longitudinally formed in one side of each guard plate 1 and used for assembling two adjacent guard plates 1.

Referring to fig. 3 and 4, the cover plate 2 includes a top plate 21, spoiler strips 22 extending downward from the top plate 21, and support plates 23 recessed from four corners of the top plate 21, wherein the support plates 23 contact with the top surface of the protection plate 1, i.e., the top surfaces of the four corners of the protection plate 1. The top plate 21 is provided with a through hole 211 for introducing shielding gas, and specifically, the through hole 211 is located in the middle of the top plate 21.

The spoiler strips 22 are perpendicular to the top plate 21 and disposed near the edges of the top plate 21. In the vertical direction, the spoiler 22 is not lower than the top of the protector plate 1, i.e. the lowest part of the spoiler 22 is located above the top surface of the protector plate 1. Specifically, the spoiler 22 includes four edge strips enclosing a square shape, and each edge strip is parallel to one side of the top plate 21.

The height difference between the top plate 21 and the supporting plate 23 is not less than the height of the turbulence strips 22, so that the gas smoothly flows to the gas outlet 11 without being blocked by the turbulence strips 22. In the utility model, the height difference between the top plate 21 and the supporting plate 23 is the same as the height of the spoiler 22. Preferably, the height of the edge strips is 40mm to 50mm, the length is 800mm to 820mm, and the thickness is 3mm to 5 mm. In other embodiments, the size of the edge strip can be adaptively adjusted according to the size of the crucible and the shield plate 1 in actual production, which is not limited herein.

The support plate 23 is squarePreferably 140X 140mm in size²The height of the utility model is 40-50 mm. The backup pad 23 is used for supporting the apron 2 on the one hand on the backplate 1, guarantees the stability of apron 2, and on the other hand can increase the distance of apron 2 and the gas outlet 11 of backplate 1, has effectively increased the gas flow of giving vent to anger for the silicon monoxide and the gaseous timely discharge of carbon monoxide that produce during the ingot casting reduce oxygen, carbon impurity pollution ingot probably.

Preferably, the edge strips are respectively connected to the inner corners of the support plates 23. The distance between the edge strip and the edge of the top plate 21 is 130mm to 150 mm. Because gaseous reflux phenomenon exists between the liquid level of apron 2 and silicon melt, add near roof 21 edge and establish the strake, the strake is close to 11 positions of gas outlet of backplate 1 promptly, can effectively block gaseous backward flow, and the silicon monoxide that produces when preventing the ingot casting flows back to silicon melt liquid level with carbon monoxide gas.

Further, the middle part of the side edge of the top plate 21 is provided with a downward concave mounting plate 24, which is specifically square, and the mounting plate 24 is positioned outside the area surrounded by the spoiler 22. The mounting plate 24 contacts with the top surface of the guard plate 1, a mounting groove is formed in the mounting plate, a mounting hole is formed in the corresponding guard plate 1 (at the position of the protruding portion 12), the mounting plate 24 contacts with the guard plate 1, and the cover plate 2 is fixed with the guard plate 1 through a graphite screw and a nut. In other embodiments, mounting holes may be opened on the support plate 23 to mount the cover plate 2 and the cover plate 1 without providing a separate mounting plate.

In addition, in the utility model discloses in, backup pad 23 and mounting panel 24 are roof 21 downward protrusion formation, so set up, save material reduces the weight of apron 2, and in other embodiments, backup pad 23 and mounting panel 24 can install on roof 21 through other modes, do not limit here. The cover plate 2 is formed integrally, and the material thereof is preferably graphite.

To sum up, the utility model discloses an ingot furnace sets up the vortex strip through the below at the apron for gas in the ingot furnace can discharge through the gas outlet of backplate fast, prevents the gas reflux, and then reduces the content of oxygen, carbon impurity in the silicon melt.

Terms such as "upper", "lower", and the like, used herein to denote relative spatial positions, are used herein for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims.

In addition, the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the person of ordinary skill in the art should understand that the person of ordinary skill in the art can still modify the present invention or substitute the same, and all the technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims (9)

1. An ingot furnace, comprising: crucible, locate crucible backplate all around, locate the heater and the lid of backplate periphery are located the backplate with the apron of crucible top, its characterized in that: the cover plate comprises a top plate, turbulence strips extending downwards from the top plate and support plates extending downwards from four corners of the top plate, and the support plates are in contact with the top surface of the guard plate; the top plate is provided with a through hole for introducing protective gas, the turbulence strip is perpendicular to the top plate and close to the edge of the top plate, and the turbulence strip is not lower than the top of the guard plate in the vertical direction.

2. The ingot furnace of claim 1, wherein: the height difference between the top plate and the supporting plate is the same as the height of the turbulence strips.

3. The ingot furnace of claim 1, wherein: the vortex strip includes and encloses into four strakes of square, every strake respectively with one side of roof is parallel.

4. The ingot furnace of claim 3, wherein: the edge strips are respectively connected with the inner angles of the supporting plates.

5. The ingot furnace of claim 3, wherein: and a concave mounting plate is arranged in the middle of the side edge of the top plate and is in contact with the top surface of the guard plate.

6. The ingot furnace of claim 5, wherein: the mounting plate is square, a mounting groove is formed in the mounting plate, and the mounting plate is located on the outer side of an area defined by the turbulence strips.

7. The ingot furnace of claim 1, wherein: the cover plate is of an integrally formed structure, and a plurality of air outlets are formed in the edge of the upper portion of the guard plate.

8. The ingot furnace of claim 3, wherein: the height of strake is 40mm to 50mm, the length of strake is 800mm to 820mm, the thickness of strake is 3mm to 5 mm.

9. The ingot furnace of claim 3, wherein: the distance between the edge strips and the edge of the top plate is 130 mm-150 mm.

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