Uniformly-heated heating device for improving yellowing of small-particle-size silicon material

Abstract

The utility model belongs to the technical field of photovoltaic, and particularly relates to a heating device for improving yellowing of uniformly-heated small-particle-size silicon materials, which comprises a furnace body, a heating seat arranged at the lower end of the furnace body, a vacuum valve arranged on the furnace body, a cooling valve arranged on the furnace body, and a cover contacted with the upper end of the furnace body. And a motor is fixedly installed at the upper end of the cover, the output end of the motor is rotationally connected with the cover, and the output end of the motor is fixedly connected with a stirring rod. The vacuum valve, the heating seat, the cooling valve and other parts are arranged, in the deep processing process of small-particle-size silicon materials, the temperature of the lower portion of the tool is low, silicon monoxide formed through oxidation is deposited in a low-temperature area, in the natural state, the silicon monoxide is faint yellow, the silicon monoxide is vaporized and discharged out of the heat insulation cage to be deposited after the materials become yellow and are heated, and therefore the silicon monoxide is not prone to being oxidized. The problem that the material becomes yellow in the deep processing process of the small-particle-size silicon material is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a heating device for improving the yellowing of small-grained silicon materials with uniform heating. Background Art

[0002] Small-particle silicon refers to silicon raw materials with smaller particle sizes, usually small particles or fine fragments formed during the processing and purification of silicon materials. This type of silicon material is widely used as raw materials for ingots and melting in solar photovoltaic, battery manufacturing or other silicon-based material applications. Small-particle silicon materials are mainly used for drawing solar-grade single-crystal silicon rods. During the deep processing of small-particle silicon materials, the temperature at the bottom of the tooling is low, and the silicon monoxide formed by oxidation is deposited in the low-temperature zone. In the natural state, silicon monoxide is light yellow, so it is reflected as yellowing of the material. Utility Model Content

[0003] The utility model aims to provide a heating device for improving yellowing of small-particle silicon materials with uniform heating, thereby solving the problem of yellowing of materials during deep processing of small-particle silicon materials.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heating device for improving the yellowing of small-particle silicon material with uniform heating, comprising a furnace body, a heating seat is arranged at the lower end of the furnace body, a vacuum valve is arranged on the furnace body, a cooling valve is arranged on the furnace body, the upper end of the furnace body contacts with a cover, a motor is fixedly installed on the upper end of the cover, the output end of the motor is rotatably connected to the cover, the output end of the motor is fixedly connected to a stirring rod, the stirring rod is rotatably connected to the furnace body, a sealing gasket is slidably connected to the inside of the cover, a pad is fixedly connected to the inner wall of the furnace body, a support rod is fixedly connected to the lower end of the cover, the support rod is slidably connected to the sealing gasket, a spring is arranged inside the sealing gasket, and a limiting mechanism is arranged on the cover.

[0005] Preferably, the sealing gasket is slidably connected to the furnace body, and the sealing gasket is in contact with the backing plate. The design of the sealing gasket can increase the sealing performance between the cover and the furnace body.

[0006] Preferably, a limiting ring is fixedly connected inside the sealing gasket, and the limiting ring is slidably connected to the support rod. The limiting ring can play a limiting role on the sealing gasket through the design of the limiting ring.

[0007] Preferably, one end of the spring is in contact with the sealing gasket, and the other end of the spring is in contact with the support rod. The design of the spring can drive the sealing gasket to fit with the backing plate.

[0008] Preferably, the limit mechanism includes a limit frame, the outer side of the cover is slidably connected to the limit frame, the outer side of the furnace body is fixedly connected to the limit block, the interior of the limit frame is fixedly connected with a guide rod, the upper end of the cover is fixedly connected with a guide block, the guide block is slidably connected to the limit frame, the guide block is slidably connected to the guide rod, the interior of the limit frame is rotatably connected with a threaded rod, the threaded rod is threadedly connected to the cover, the outer side of the threaded rod is fixedly connected with a retaining ring, the retaining ring is rotatably connected to the limit frame, the retaining ring is in contact with the cover, and the knob is turned to drive the threaded rod to rotate, so that the threaded rod and the cover undergo threaded motion, thereby causing the threaded rod to move inside the cover, the threaded rod drives the limit frame to move, and the limit frame is slidably socketed with the limit block, so that the limit frame can limit the cover, so that the cover and the furnace body can be installed stably.

[0009] Preferably, the limiting frame is in contact with the furnace body, and the limiting frame is slidably sleeved with the limiting block. The limiting frame can play a limiting role on the lid through the design of the limiting frame.

[0010] Preferably, one end of the threaded rod away from the cover is fixedly connected with a knob, and the knob is in contact with the limiting frame. The threaded rod can be easily rotated through the design of the knob.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model is provided with components such as a vacuum valve, a heating seat, and a cooling valve. During the deep processing of small-particle silicon materials, the temperature of the lower part of the tooling is low, and the silicon monoxide formed by oxidation is deposited in the low-temperature zone. Under the natural state, the silicon monoxide is light yellow, which is reflected in the yellowing of the material. After heating, the silicon monoxide vaporizes and is discharged from the insulation cage for deposition, thereby solving the problem of yellowing of the material during the deep processing of small-particle silicon materials.

[0013] 2. The utility model is provided with a stirring rod, so that the material can be heated more evenly; by providing components such as a sealing pad, the sealing effect between the lid and the furnace body can be ensured when the furnace body is evacuated; by providing components such as a limit frame, a limit block, a threaded rod, etc., the lid and the furnace body can remain stable after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 For the utility model Figure 2 A magnified view of the structure of part A;

[0016] Figure 3 For the utility model Figure 2 A magnified view of the structure of part B;

[0017] Figure 4For the utility model Figure 1 Bottom view of the sealing gasket in FIG.

[0018] In the figure: 1. furnace body; 11. heating seat; 12. vacuum valve; 13. cooling valve; 2. cover; 3. motor; 31. stirring rod; 4. sealing gasket; 41. pad; 42. support rod; 43. limit ring; 44. spring; 5. limit mechanism; 51. limit frame; 52. limit block; 53. guide rod; 54. guide block; 55. threaded rod; 56. retaining ring; 57. knob. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 A heating device for improving yellowing of small-sized silicon material with uniform heating comprises a furnace body 1, a heating seat 11 is arranged at the lower end of the furnace body 1, a vacuum valve 12 is arranged on the furnace body 1, a cooling valve 13 is arranged on the furnace body 1, a cover 2 is contacted at the upper end of the furnace body 1, a motor 3 is fixedly installed at the upper end of the cover 2, an output end of the motor 3 is rotatably connected to the cover 2, a stirring rod 31 is fixedly connected to the output end of the motor 3, the stirring rod 31 is rotatably connected to the furnace body 1, a sealing gasket 4 is slidably connected to the inside of the cover 2, a pad 41 is fixedly connected to the inner wall of the furnace body 1, the sealing gasket 4 is slidably connected to the furnace body 1, and the sealing gasket 4 contacts the pad 41, Through the design of the sealing gasket 4, the sealing performance between the lid 2 and the furnace body 1 can be increased. The lower end of the lid 2 is fixedly connected to a support rod 42, and the support rod 42 is slidably connected to the sealing gasket 4. The interior of the sealing gasket 4 is fixedly connected to a limiting ring 43, and the limiting ring 43 is slidably connected to the support rod 42. Through the design of the limiting ring 43, the sealing gasket 4 can be limited. A spring 44 is arranged inside the sealing gasket 4, one end of the spring 44 is in contact with the sealing gasket 4, and the other end of the spring 44 is in contact with the support rod 42. Through the design of the spring 44, the sealing gasket 4 can be driven to fit with the pad 41. A limiting mechanism 5 is arranged on the lid 2.

[0021] See also Figure 2-4The limiting mechanism 5 includes a limiting frame 51, the outer side of the cover 2 is slidably connected to the limiting frame 51, the outer side of the furnace body 1 is fixedly connected to the limiting block 52, the limiting frame 51 contacts the furnace body 1, the limiting frame 51 and the limiting block 52 are slidably sleeved, and the design of the limiting frame 51 can limit the cover 2, the inside of the limiting frame 51 is fixedly connected to a guide rod 53, the upper end of the cover 2 is fixedly connected to a guide block 54, the guide block 54 is slidably connected to the limiting frame 51, the guide block 54 is slidably connected to the guide rod 53, and the inside of the limiting frame 51 is rotatably connected to a threaded rod 55.

[0022] See also Figure 2-4 The threaded rod 55 is connected to the cover 2 by a threaded connection, and a retaining ring 56 is fixedly connected to the outer side of the threaded rod 55. The retaining ring 56 is rotatably connected to the limit frame 51, and the retaining ring 56 contacts the cover 2. The end of the threaded rod 55 away from the cover 2 is fixedly connected to a knob 57, and the knob 57 contacts the limit frame 51. Through the design of the knob 57, the threaded rod 55 can be easily rotated. By rotating the knob 57, the knob 57 drives the threaded rod 55 to rotate, so that the threaded rod 55 and the cover 2 undergo a threaded motion, thereby moving the threaded rod 55 inside the cover 2, and driving the limit frame 51 to move, so that the limit frame 51 and the limit block 52 are slidably connected, so that the limit frame 51 can limit the cover 2, so that the cover 2 and the furnace body 1 are installed stably.

[0023] The specific implementation process of the utility model is as follows: when in use, by installing the cover 2 and the furnace body 1, the cover 2 drives the sealing gasket 4 to slide into the furnace body 1, the sealing gasket 4 contacts the backing plate 41, the sealing gasket 4 drives the limiting ring 43 to slide on the support rod 42, and the sealing gasket 4 squeezes the spring 44, the sealing gasket 4 can be driven to fit with the backing plate 41 through the elastic force of the spring 44, so as to effectively increase the sealing between the cover 2 and the furnace body 1, and then the knob 57 is turned to make the knob 57 drive the threaded rod 55 to rotate, so that the threaded rod 55 and the cover 2 have a threaded movement, so that the threaded rod 55 moves inside the cover 2, the threaded rod 55 drives the limiting frame 51 to move, and the limiting frame 51 and the limiting block 52 are slidably connected, so that the limiting frame 51 can limit the cover 2, so that the cover 2 and the furnace body 1 are installed stably;

[0024] The inside of the furnace body 1 is evacuated to a vacuum state through the vacuum valve 12, and then the heating seat 11 is started to heat and melt the material. By starting the motor 3, the output end of the motor 3 drives the stirring rod 31 to rotate, so that the stirring rod 31 stirs the material, so that the material is heated more evenly, and then argon gas is injected into the furnace body 1 through the cooling valve 13 to cool it down, and then the next step can be carried out. Through the above operation, the proportion of yellowing materials can be reduced from the original 14% to 0.2%. Improve the utilization rate of raw materials and reduce costs; the single crystal formation rate is increased by 20 times. Improve the yield rate and improve product quality.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heating device for improving yellowing of small-sized silicon material with uniform heating, comprising a furnace body (1), characterized in that: A heating seat (11) is arranged at the lower end of the furnace body (1), a vacuum valve (12) is arranged on the furnace body (1), a cooling valve (13) is arranged on the furnace body (1), the upper end of the furnace body (1) contacts a cover (2), a motor (3) is fixedly mounted on the upper end of the cover (2), the output end of the motor (3) is rotatably connected to the cover (2), the output end of the motor (3) is fixedly connected to a stirring rod (31), the stirring rod (31) is rotatably connected to the furnace body (1), a sealing gasket (4) is slidably connected inside the cover (2), a pad (41) is fixedly connected to the inner wall of the furnace body (1), a support rod (42) is fixedly connected to the lower end of the cover (2), the support rod (42) is slidably connected to the sealing gasket (4), a spring (44) is arranged inside the sealing gasket (4), and a limiting mechanism (5) is arranged on the cover (2).

2. The heating device for improving yellowing of small-sized silicon material with uniform heating according to claim 1, characterized in that: The sealing gasket (4) is slidably connected to the furnace body (1), and the sealing gasket (4) is in contact with the backing plate (41).

3. The heating device for improving yellowing of small-sized silicon material with uniform heating according to claim 1, characterized in that: A limiting ring (43) is fixedly connected inside the sealing pad (4), and the limiting ring (43) is slidably connected to the support rod (42).

4. The heating device for improving yellowing of small-sized silicon material with uniform heating according to claim 1, characterized in that: One end of the spring (44) contacts the sealing pad (4), and the other end of the spring (44) contacts the support rod (42).

5. The heating device for improving yellowing of small-sized silicon material with uniform heating according to claim 1, characterized in that: The limiting mechanism (5) comprises a limiting frame (51), the outer side of the cover (2) is slidably connected to the limiting frame (51), the outer side of the furnace body (1) is fixedly connected to the limiting block (52), the interior of the limiting frame (51) is fixedly connected to a guide rod (53), the upper end of the cover (2) is fixedly connected to a guide block (54), the guide block (54) is slidably connected to the limiting frame (51), the guide block (54) is slidably connected to the guide frame (51), the guide block (54) is slidably connected to the guide rod (53), the interior of the limiting frame (51) is rotatably connected to a threaded rod (55), the threaded rod (55) is threadedly connected to the cover (2), the outer side of the threaded rod (55) is fixedly connected to a retaining ring (56), the retaining ring (56) is rotatably connected to the limiting frame (51), and the retaining ring (56) is in contact with the cover (2).

6. The heating device for improving yellowing of small-sized silicon material with uniform heating according to claim 5, characterized in that: The limiting frame (51) is in contact with the furnace body (1), and the limiting frame (51) is slidably sleeved with the limiting block (52).

7. The heating device for improving yellowing of small-sized silicon material with uniform heating according to claim 5, characterized in that: One end of the threaded rod (55) away from the cover (2) is fixedly connected to a knob (57), and the knob (57) is in contact with the limiting frame (51).

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