A temperature control device for directional solidification of polycrystalline silicon columnar crystals
By designing a temperature control device for directional solidification of polycrystalline silicon columnar crystals, the problem of accurate detection of infrared thermometers and blockage of heat dissipation devices is solved, temperature monitoring and feed uniformity are achieved, and the accuracy and stability of directional solidification are improved.
Patent Information
- Application Number
- CN202411900474.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-04-08
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, infrared thermometers cannot accurately detect temperature changes in the directional solidification process of polycrystalline silicon columnar crystals, and the heat dissipation device is prone to clogging, affecting the directional solidification effect.
A temperature control device for directional solidification of polycrystalline silicon columnar crystals is designed, including an movable temperature measuring mechanism, a feeding mechanism and an auxiliary heat dissipation mechanism. The position of the infrared thermometer is adjusted through the movable temperature measuring mechanism, the feeding amount is adjusted, and the heat dissipation fan and scraper are used to avoid blockage of the filter plate.
Accurate monitoring of the liquid-solid interface temperature and uniform feeding are achieved, avoiding blockage of the heat dissipation device, and improving the accuracy and stability of directional solidification.
Smart Images
Figure CN119776983A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of temperature control devices, in particular to a temperature control device for directional solidification of polycrystalline silicon columnar crystals. Background Art
[0002] Polycrystalline silicon columnar crystals are produced by directional solidification, which is characterized by anisotropic physical and mechanical properties. Polycrystalline silicon ingots for solar cells are produced by this directional solidification method. During the directional solidification process, the temperature gradient of the liquid-solid interface is controlled to form a unidirectional heat flow. By implementing controllable directional solidification, polycrystalline columnar crystals with anisotropic physical and mechanical properties can be formed. The growth direction of polycrystalline silicon columnar crystals is vertically upward, which is achieved through a directional solidification process. That is, during the crystallization process, a unidirectional heat flow is formed by controlling the change of the temperature field, and the temperature gradient at the liquid-solid interface is required to be greater than 0, and no temperature gradient is required in the horizontal direction, thereby forming a directionally grown columnar crystal.
[0003] In the prior art, during the directional solidification of polycrystalline silicon columnar crystals, an infrared thermometer monitors the temperature of the entire device. Since the liquid-solid interface changes during processing, the temperature change cannot be accurately detected. When the temperature is too high, a heat sink is required to dissipate heat. Since the filter of the heat sink is often fixed, it is prone to clogging during long-term use. Therefore, it is necessary to invent a temperature control device for directional solidification of polycrystalline silicon columnar crystals to solve the above problems. Summary of the invention
[0004] The object of the present invention is to provide a temperature control device for directional solidification of polycrystalline silicon columnar crystals to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a temperature control device for directional solidification of polycrystalline silicon columnar crystals, comprising an electromagnetic heating box, a cover plate is arranged on the top of the electromagnetic heating box, a temperature controller is arranged on the front of the electromagnetic heating box, a support leg is fixedly connected to the bottom of the electromagnetic heating box, a movable temperature measuring mechanism is arranged on the right side of the electromagnetic heating box, an adjusting feeding mechanism is arranged on the front of the electromagnetic heating box, and an auxiliary heat dissipation mechanism is arranged on the left side of the electromagnetic heating box; The movable temperature measuring mechanism comprises a movable component and a temperature measuring component, and the temperature measuring component is arranged on the top of the movable component.
[0006] Preferably, the movable component includes a limit frame, which is fixedly connected to the right side of the electromagnetic heating box, a slider is slidably connected inside the limit frame, a slide rod is fixedly connected to the top of the slider, a spring is fixedly connected to the bottom of the slide rod, a movable plate is fixedly connected to the bottom of the spring, and a card block is fixedly connected to the bottom of the movable plate, which is convenient for adjusting the position of the infrared thermometer, thereby facilitating operation by the staff and satisfying adjustment at different temperature measurement positions.
[0007] Preferably, the movable plate is slidably connected to the slide rod, grooves are provided at positions corresponding to the limit frame and the clamping block, and the clamping block is slidably connected inside the groove, so as to make the adjustment process more stable.
[0008] Preferably, the temperature measuring component includes a support frame, the support frame is fixedly connected to the top of the limit frame, the support frame is fixedly connected to a connecting platform inside, the connecting platform is fixedly connected to a motor at the bottom, the motor output end passes through the connecting platform and extends to the inside where a threaded rod is fixedly connected, the connecting platform is fixedly connected to a limit rod inside, the limit rod is slidably connected to a movable block outside, and an infrared thermometer is fixedly connected to the left side of the movable block, so as to always follow the temperature changes of the liquid-solid interface during the crystallization process.
[0009] Preferably, the movable block is threadedly connected to the threaded rod, grooves are provided at corresponding positions of the connecting platform and the movable block, and the movable block is slidably connected inside the groove, so as to make the monitoring process more stable.
[0010] Preferably, the adjustable feed mechanism includes a feed box, which is fixedly connected to the front side of the electromagnetic heating box, a fixed block is fixedly connected inside the feed box, a first rotating block is rotatably connected inside the fixed block, a telescopic rod is fixedly connected to the front side of the first rotating block, a second rotating block is fixedly connected to the front side of the telescopic rod, and a guide plate is rotatably connected inside the feed box to facilitate adjustment of the opening and closing angle between the two guide plates, thereby meeting the requirements of adjusting the feed amount of raw materials inside the feed box, thereby allowing the silicon rods to grow evenly.
[0011] Preferably, a groove is provided at a position corresponding to the guide plate and the second rotating block, and the second rotating block is rotatably connected inside the groove, so as to make the adjustment process more stable.
[0012] Preferably, two guide plates are provided, and the two guide plates are symmetrically distributed with the front center line of the feed box as the symmetry axis, so as to facilitate a more stable feeding process.
[0013] Preferably, the auxiliary heat dissipation mechanism includes a heat dissipation water tank, which is fixedly connected to the left side of the electromagnetic heating box, a connecting pipe is fixedly connected to the right side of the heat dissipation water tank, a heat dissipation frame is fixedly connected to the left side of the heat dissipation water tank, a filter plate is fixedly connected to the inside of the heat dissipation frame, a heat dissipation fan is fixedly connected to the inside of the heat dissipation frame, and a scraper is fixedly connected to the output end of the heat dissipation fan, so as to achieve sufficient cooling of the heat dissipation water tank while avoiding clogging of the filter plate.
[0014] Preferably, the scraper is rotatably connected to the filter plate, the scraper is in contact with the filter plate, and a circulating water pump is provided inside the heat dissipation water tank to facilitate a more stable temperature control process.
[0015] Compared with the prior art, the present invention provides a temperature control device for directional solidification of polycrystalline silicon columnar crystals, which has the following beneficial effects: 1. The temperature control device for directional solidification of polycrystalline silicon columnar crystals is provided with an active temperature measuring mechanism. During use, the movable plate is moved in cooperation with a spring to facilitate adjustment of the position of the infrared temperature measuring device, thereby facilitating operation by the staff and satisfying the requirements of different temperature measuring positions. The threaded rod is rotated by the motor, so that the temperature change of the liquid-solid interface can be followed at all times during the crystallization process.
[0016] 2. The temperature control device for directional solidification of polycrystalline silicon columnar crystals has a feed adjustment mechanism. During use, the telescopic rod is operated to move the first rotating block and the second rotating block, so as to adjust the opening and closing angle between the two guide plates, thereby adjusting the feed amount of the raw materials in the feed box, so as to make the silicon rods grow evenly.
[0017] 3. The temperature control device for directional solidification of polycrystalline silicon columnar crystals, through the auxiliary heat dissipation mechanism, during use, through the operation of the heat dissipation fan, in cooperation with the filter plate, is convenient for achieving sufficient cooling of the heat dissipation water tank while avoiding clogging of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor: Figure 1 It is a schematic diagram of the front structure of the present invention; Figure 2 It is a schematic diagram of the structure of the active component of the present invention; Figure 3 It is a schematic diagram of the internal structure of the active component of the present invention; Figure 4 This is a schematic diagram of the structure of the temperature measurement component of the present invention; Figure 5 This is a schematic diagram of the internal structure of the temperature measurement component of the present invention; Figure 6 This is a schematic diagram of the structure of the feed adjustment mechanism of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the feed adjustment mechanism of the present invention; Figure 8 This is a schematic diagram of the auxiliary heat dissipation mechanism structure of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the auxiliary heat dissipation mechanism of the present invention.
[0019] In the figure: 1. electromagnetic heating box; 2. cover plate; 3. temperature controller; 4. support leg; 5. movable temperature measuring mechanism; 51. movable component; 511. limit frame; 512. slider; 513. slide bar; 514. spring; 515. movable plate; 516. clamping block; 52. temperature measuring component; 521. support frame; 522. connecting table; 523. motor; 524. threaded rod; 525. limit rod; 526. movable block; 527. infrared thermometer; 6. feed adjustment mechanism; 61. feed box; 62. fixed block; 63. first rotating block; 64. telescopic rod; 65. second rotating block; 66. guide plate; 7. auxiliary heat dissipation mechanism; 71. heat dissipation water tank; 72. connecting pipe; 73. heat dissipation frame; 74. filter plate; 75. heat dissipation fan; 76. scraper. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1
[0022] See also Figure 1-5 The present invention provides a technical solution: a temperature control device for directional solidification of polycrystalline silicon columnar crystals, comprising an electromagnetic heating box 1, a cover plate 2 is arranged on the top of the electromagnetic heating box 1, a temperature controller 3 is arranged on the front of the electromagnetic heating box 1, a support leg 4 is fixedly connected to the bottom of the electromagnetic heating box 1, a movable temperature measuring mechanism 5 is arranged on the right side of the electromagnetic heating box 1, an adjusting feeding mechanism 6 is arranged on the front of the electromagnetic heating box 1, and an auxiliary heat dissipation mechanism 7 is arranged on the left side of the electromagnetic heating box 1; The movable temperature measuring mechanism 5 includes a movable component 51 and a temperature measuring component 52 . The temperature measuring component 52 is arranged on the top of the movable component 51 .
[0023] Furthermore, the movable component 51 includes a limit frame 511, which is fixedly connected to the right side of the electromagnetic heating box 1. A slider 512 is slidably connected inside the limit frame 511. A slide bar 513 is fixedly connected to the top of the slider 512. A spring 514 is fixedly connected to the bottom of the slide bar 513. A movable plate 515 is fixedly connected to the bottom of the spring 514. A clamping block 516 is fixedly connected to the bottom of the movable plate 515 to facilitate the adjustment of the position of the infrared thermometer 527, thereby facilitating the operation of the staff and satisfying the adjustment of different temperature measurement positions.
[0024] Furthermore, the movable plate 515 is slidably connected to the slide rod 513, grooves are provided at corresponding positions of the limit frame 511 and the clamping block 516, and the clamping block 516 is slidably connected inside the groove, so that the adjustment process is more stable.
[0025] Furthermore, the temperature measuring component 52 includes a support frame 521, which is fixedly connected to the top of the limit frame 511, and a connecting platform 522 is fixedly connected inside the support frame 521. A motor 523 is fixedly connected to the bottom of the connecting platform 522, and an output end of the motor 523 extends through the connecting platform 522 to the inside where a threaded rod 524 is fixedly connected. A limit rod 525 is fixedly connected inside the connecting platform 522, and a movable block 526 is slidably connected to the outside of the limit rod 525. An infrared thermometer 527 is fixedly connected to the left side of the movable block 526, so as to meet the needs of always following the temperature changes of the liquid-solid interface during the crystallization process.
[0026] Furthermore, the movable block 526 is threadedly connected to the threaded rod 524, grooves are provided at corresponding positions of the connecting platform 522 and the movable block 526, and the movable block 526 is slidably connected inside the groove, so that the monitoring process is more stable. Embodiment 2
[0027] See also Figure 6-7 , and combined with Example 1, it is further obtained that the adjusting feeding mechanism 6 includes a feeding box 61, the feeding box 61 is fixedly connected to the front of the electromagnetic heating box 1, a fixed block 62 is fixedly connected inside the feeding box 61, a first rotating block 63 is rotatably connected inside the fixed block 62, a telescopic rod 64 is fixedly connected to the front of the first rotating block 63, a second rotating block 65 is fixedly connected to the front of the telescopic rod 64, and a guide plate 66 is rotatably connected inside the feeding box 61, so as to facilitate the adjustment of the opening and closing angle between the two guide plates 66, so as to meet the adjustment of the feeding amount of the raw materials inside the feeding box 61, so as to make the silicon rods grow evenly.
[0028] Furthermore, grooves are provided at positions corresponding to the guide plate 66 and the second rotating block 65, and the second rotating block 65 is rotatably connected inside the grooves, so that the adjustment process is more stable.
[0029] Furthermore, two guide plates 66 are provided, and the two guide plates 66 are symmetrically distributed with the front center line of the feed box 61 as the symmetry axis, so as to facilitate a more stable feeding process. Embodiment 3
[0030] See also Figure 8-9 , and combined with Example 1 and Example 2, it is further obtained that the auxiliary heat dissipation mechanism 7 includes a heat dissipation water tank 71, the heat dissipation water tank 71 is fixedly connected to the left side of the electromagnetic heating box 1, the heat dissipation water tank 71 is fixedly connected to a connecting pipe 72 on the right side, the heat dissipation water tank 71 is fixedly connected to a heat dissipation frame 73 on the left side, the heat dissipation frame 73 is fixedly connected to a filter plate 74 inside, the heat dissipation frame 73 is fixedly connected to a heat dissipation fan 75 inside, and the output end of the heat dissipation fan 75 is fixedly connected to a scraper 76, which is convenient for achieving sufficient cooling of the heat dissipation water tank 71 while avoiding clogging of the filter plate 74.
[0031] Furthermore, the scraper 76 is rotatably connected to the filter plate 74, the scraper 76 is in contact with the filter plate 74, and a circulating water pump is provided inside the heat dissipation water tank 71 to facilitate a more stable temperature control process.
[0032] In the actual operation process, when this device is used, the cover plate 2 is first opened by setting, and the feed box 61 is cooperated to introduce the raw materials to be processed into the electromagnetic heating box 1, and the electromagnetic heating box 1 is set to start heating. The temperature measurement position is adjusted according to the needs, and the staff pulls the movable plate 515, and the movable plate 515 is moved by the spring 514, and the block 516 is moved by the limit frame 511, and the slider 512 is moved by the limit frame 511. The motor 523 is set to work, so that the threaded rod 524 rotates, and the limit rod 525 is cooperated to make the movable Block 526 moves to adjust the height of the infrared thermometer 527. When the electromagnetic heating box 1 needs to be cooled, the heat dissipation water tank 71 is set to work, and the connecting pipe 72 is cooperated to start cooling the electromagnetic heating box 1. The heat dissipation fan 75 is set to work, and the filter plate 74 is cooperated to cool the heat dissipation water tank 71. The heat dissipation fan 75 is set to work to make the scraper 76 rotate. When the temperature changes, the telescopic rod 64 is set to work to make the first rotating block 63 and the second rotating block 65 move, and the fixed block 62 is cooperated to make the guide plate 66 rotate.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
Claims
1. A temperature control device for directional solidification of polycrystalline silicon columnar crystals, comprising an electromagnetic heating box (1), characterized in that: The electromagnetic heating box (1) is provided with a cover plate (2) on the top, a temperature controller (3) is provided on the front of the electromagnetic heating box (1), a supporting leg (4) is fixedly connected to the bottom of the electromagnetic heating box (1), a movable temperature measuring mechanism (5) is provided on the right side of the electromagnetic heating box (1), a feed regulating mechanism (6) is provided on the front of the electromagnetic heating box (1), and an auxiliary heat dissipation mechanism (7) is provided on the left side of the electromagnetic heating box (1); The movable temperature measuring mechanism (5) comprises a movable component (51) and a temperature measuring component (52), wherein the temperature measuring component (52) is arranged on top of the movable component (51).
2. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 1, characterized in that: The movable component (51) comprises a limit frame (511), the limit frame (511) is fixedly connected to the right side of the electromagnetic heating box (1), a slider (512) is slidably connected inside the limit frame (511), a slide bar (513) is fixedly connected to the top of the slide bar (512), a spring (514) is fixedly connected to the bottom of the slide bar (513), a movable plate (515) is fixedly connected to the bottom of the spring (514), and a clamping block (516) is fixedly connected to the bottom of the movable plate (515).
3. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 2, characterized in that: The movable plate (515) is slidably connected to the sliding rod (513); grooves are provided at corresponding positions of the limiting frame (511) and the clamping block (516); and the clamping block (516) is slidably connected inside the groove.
4. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 3, characterized in that: The temperature measurement component (52) comprises a support frame (521), the support frame (521) is fixedly connected to the top of the limiting frame (511), a connecting platform (522) is fixedly connected inside the support frame (521), a motor (523) is fixedly connected to the bottom of the connecting platform (522), an output end of the motor (523) passes through the connecting platform (522) and extends to the inside where a threaded rod (524) is fixedly connected, a limiting rod (525) is fixedly connected inside the connecting platform (522), a movable block (526) is slidably connected outside the limiting rod (525), and an infrared thermometer (527) is fixedly connected to the left side of the movable block (526).
5. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 4, characterized in that: The movable block (526) is threadedly connected to the threaded rod (524); grooves are provided at corresponding positions of the connecting platform (522) and the movable block (526); and the movable block (526) is slidably connected inside the groove.
6. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 1, characterized in that: The adjustable feeding mechanism (6) comprises a feeding box (61), the feeding box (61) being fixedly connected to the front face of the electromagnetic heating box (1), a fixed block (62) being fixedly connected inside the feeding box (61), a first rotating block (63) being rotatably connected inside the fixed block (62), a telescopic rod (64) being fixedly connected to the front face of the first rotating block (63), a second rotating block (65) being fixedly connected to the front face of the telescopic rod (64), and a guide plate (66) being rotatably connected inside the feeding box (61).
7. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 6, characterized in that: The guide plate (66) and the second rotating block (65) are provided with grooves at positions corresponding to the positions, and the second rotating block (65) is rotatably connected inside the grooves.
8. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 7, characterized in that: Two guide plates (66) are provided, and the two guide plates (66) are symmetrically distributed with the front center line of the feed box (61) as the symmetry axis.
9. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 1, characterized in that: The auxiliary heat dissipation mechanism (7) comprises a heat dissipation water tank (71), the heat dissipation water tank (71) being fixedly connected to the left side of the electromagnetic heating box (1), a connecting pipe (72) being fixedly connected to the right side of the heat dissipation water tank (71), a heat dissipation frame (73) being fixedly connected to the left side of the heat dissipation water tank (71), a filter plate (74) being fixedly connected inside the heat dissipation frame (73), a heat dissipation fan (75) being fixedly connected inside the heat dissipation frame (73), and a scraper (76) being fixedly connected to the output end of the heat dissipation fan (75).
10. The temperature control device for directional solidification of polycrystalline silicon columnar crystals according to claim 9, characterized in that: The scraper (76) is rotatably connected to the filter plate (74), the scraper (76) is in contact with the filter plate (74), and a circulating water pump is provided inside the heat dissipation water tank (71).