Charging device and single crystal furnace
By designing a feeder that includes a cylinder, a central shaft, a conical body, and a baffle assembly, the problem of water-cooled screen damage caused by silicon splashing during the refeeding of silicon material by traditional feeders is solved. This achieves effective shielding of the water-cooled screen, extends its service life, and improves production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRINA SOLAR CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional feeders can cause silicon sputtering spots to adhere to the water-cooled screen when refeeding silicon material, leading to damage to the water-cooled screen, abnormal crystal pulling, and reduced production efficiency.
Design a feeder including a cylinder, a central shaft, a cone, and a baffle assembly. By switching the baffle's open and closed states, it can shield the water-cooled screen and prevent silicon sputtering points from contacting the water-cooled screen.
It effectively prevents silicon sputtering points from contacting the water-cooled screen, extends the service life of the water-cooled screen, reduces equipment maintenance costs, and improves crystal quality and production efficiency.
Smart Images
Figure CN224531121U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy storage technology, specifically providing a feeder and a single crystal furnace. Background Technology
[0002] In the production of monocrystalline silicon, the monocrystalline furnace is the core equipment. Its working principle is to melt silicon material in an inert gas environment using a graphite resistance heater, and then grow dislocation-free monocrystalline silicon using the Czochralski method. The re-feeding of silicon material is a key step in the operation of the monocrystalline furnace.
[0003] Currently, traditional feeders have significant drawbacks in the silicon refeeding process. When the silicon slab enters the molten silicon through a traditional feeder, silicon specks are easily splashed due to the impact of the falling slab and the surface tension of the molten silicon. These splashed silicon specks adhere to the water-cooled screen. As a crucial component of the single-crystal furnace, the water-cooled screen plays a key role in maintaining stable furnace temperature and ensuring a suitable environment for crystal growth. Silicon specks adhering to the water-cooled screen gradually accumulate, forming a fouling layer that affects the heat dissipation of the screen, thereby reducing its lifespan and increasing equipment maintenance costs.
[0004] More seriously, silicon dots attached to the water-cooled screen may detach during subsequent crystal pulling, falling into the molten silicon and interfering with normal crystal growth, causing abnormalities such as wire breakage. This not only leads to a decrease in the quality of the produced monocrystalline silicon and the appearance of defects such as dislocations, but also interrupts the production process, reduces production efficiency, and causes economic losses to the company.
[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content
[0006] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of silicon splashing during the refeeding of silicon material by existing feeders, which causes damage to the water-cooled screen, leads to abnormal crystal pulling, and affects quality and efficiency.
[0007] In a first aspect, the present invention provides a feeder, comprising a cylinder, a central shaft, a conical body, and a baffle assembly.
[0008] The central shaft is movably disposed within the cylinder;
[0009] The cone is disposed at the bottom of the cylinder and connected to the bottom end of the central shaft, and the maximum outer diameter of the cone is adapted to the inner diameter of the cylinder;
[0010] The baffle assembly includes a fixing ring, multiple baffles, and a clamp. The fixing ring is fixed to the bottom of the cylinder along the circumference of the cylinder. The upper end of the baffle is rotatably connected to the fixing ring, and the lower end of the baffle is a free end. The clamp is sleeved on the outer wall of the cylinder and connected to the conical body. The diameter of the clamp is larger than the diameter of the fixing ring.
[0011] When the central shaft drives the conical body to move axially along the cylinder, the clamp can move synchronously with the conical body, and the axial displacement of the clamp controls the switching of the baffle between the closed state and the unfolded state.
[0012] In the preferred embodiment of the above-mentioned feeder, the fixing ring includes a connecting part and a mounting part. The connecting part and the mounting part are connected in an L-shape. The connecting part is connected to the cylinder. The upper surface of the mounting part is provided with a plurality of mounting seats at intervals. A rotating shaft is connected between two adjacent mounting seats. The upper end of the baffle is rotatably connected to the rotating shaft. When the baffle is in the unfolded state, the bottom surface of the baffle abuts against the upper surface of the mounting part to limit the position of the baffle.
[0013] In the preferred embodiment of the above-mentioned feeder, the weight of the lower end of the baffle is greater than the weight of the upper end of the baffle.
[0014] In the preferred embodiment of the above-mentioned feeder, a connecting rod is provided between the conical body and the clamp, and the conical body and the clamp are connected by the connecting rod.
[0015] In the preferred embodiment of the above-mentioned feeder, multiple connecting rods are provided, and the multiple connecting rods are spaced apart; and / or
[0016] The connecting rod is threadedly connected to the tapered body.
[0017] In the preferred embodiment of the above-mentioned feeder, the distance between the fixing ring and the bottom end of the cylinder is 10mm to 50mm.
[0018] In the preferred embodiment of the above-mentioned feeder, a support is provided at the top of the cylinder, and a positioning hole is provided on the support, with the top of the central shaft passing through the positioning hole.
[0019] In the preferred embodiment of the above-mentioned feeder, near the top of the cylinder, a fixed flange and a movable flange are installed at intervals on the outer wall of the cylinder. The fixed flange and the movable flange are connected by an adjusting screw, and the position of the movable flange can be adjusted by the adjusting screw.
[0020] In a second aspect, the present invention also provides a single crystal furnace, including a furnace body, a crucible, a water-cooled screen, and a feeder as described in any of the above. The crucible and the water-cooled screen are disposed in the furnace body and the water-cooled screen is located above the crucible. A feeding channel is provided at the top of the furnace body. The feeder can extend into the feeding channel. When the feeder feeds material into the crucible, the baffle can unfold and block the lower end of the water-cooled screen.
[0021] In the preferred embodiment of the above-mentioned single crystal furnace, the shape of the baffle matches the lower end of the water-cooled screen.
[0022] Those skilled in the art will understand that this utility model provides a feeder, including a cylinder, a central shaft, a conical body, and a baffle assembly. The central shaft is movably disposed within the cylinder; the conical body is disposed at the bottom of the cylinder and connected to the bottom end of the central shaft, with its maximum outer diameter matching the inner diameter of the cylinder; the baffle assembly includes a fixing ring, multiple baffles, and a clamp. The fixing ring is fixed circumferentially to the bottom of the cylinder; the upper end of each baffle is rotatably connected to the fixing ring, and the lower end of each baffle is a free end; the clamp is fitted onto the outer wall of the cylinder and connected to the conical body, with the clamp's diameter being larger than the diameter of the fixing ring. When the central shaft drives the conical body to move axially along the cylinder, the clamp moves synchronously with the conical body, and the axial displacement of the clamp controls the switching of the baffles between a closed and an open state. By employing the above-described technical means, this utility model can solve the problem of silicon splashing causing damage to the water-cooled screen during silicon feeding. Specifically, during the refilling of silicon material, the baffle in the baffle assembly can unfold to effectively shield the water-cooled screen, preventing silicon sputtering points from directly contacting the water-cooled screen, thereby greatly reducing the risk of damage to the water-cooled screen.
[0023] Furthermore, the fixing ring includes a connecting part and a mounting part. The connecting part and the mounting part are connected in an L-shape. The connecting part is connected to the cylinder body. Multiple mounting seats are spaced apart on the upper surface of the mounting part. A rotating shaft connects two adjacent mounting seats. The upper end of the baffle is rotatably connected to the rotating shaft. When the baffle is in the unfolded state, the bottom surface of the baffle abuts against the upper surface of the mounting part to limit the baffle. This structure can limit the flip angle of the baffle, thereby ensuring effective shielding of the water-cooled screen.
[0024] Furthermore, the weight of the lower end of the baffle is greater than the weight of the upper end. This structural design allows the baffle to automatically droop and unfold under gravity, effectively shielding the water-cooled screen. Attached Figure Description
[0025] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:
[0026] Figure 1 This is an exploded view of the feeder of this utility model;
[0027] Figure 2 This is a cross-sectional view of the feeder of this utility model;
[0028] Figure 3 This is a schematic diagram of the structure of the fixing ring of this utility model;
[0029] Figure 4 This is a schematic diagram of the structure of the single crystal furnace of this utility model;
[0030] Figure 5 This is a cross-sectional view of the single crystal furnace of this utility model.
[0031] List of reference numerals in the attached diagram:
[0032] 100. Single crystal furnace; 101. Furnace body; 1011. Feeding channel; 102. Crucible; 103. Water-cooled screen;
[0033] 1. Cylinder body; 11. Support; 111. Positioning hole; 12. Fixed flange; 13. Movable flange; 14. Adjusting screw;
[0034] 2. Central axis;
[0035] 3. Conical shape;
[0036] 4. Baffle assembly; 41. Fixing ring; 411. Connecting part; 412. Mounting part; 4121. Mounting base; 4122. Rotating shaft; 42. Baffle plate; 43. Clamp; 44. Connecting rod. Detailed Implementation
[0037] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are described in conjunction with a single crystal furnace, the feeder provided by the present invention is also applicable to other products that need to solve the problem of solution splashing during the feeding process.
[0038] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] Based on the problems pointed out in the background art, existing feeders cause silicon splashing during silicon refeeding, resulting in damage to the water-cooled screen, abnormal crystal pulling, and reduced quality and efficiency. This utility model provides a feeder that, during silicon refeeding, uses a baffle assembly to shield the water-cooled screen, effectively solving the problems of silicon splashing during silicon refeeding causing damage to the water-cooled screen, abnormal crystal pulling, and reduced quality and efficiency.
[0040] like Figure 1 and Figure 2 As shown, this utility model provides a feeder for use in a single crystal furnace 100 (e.g., Figure 4 and Figure 5During the refeeding process of silicon material (as shown), the water-cooled screen 103 is shielded to prevent silicon splashing from damaging it. The feeder includes a cylinder 1, a central shaft 2, a conical body 3, and a baffle assembly 4. The central shaft 2 is movably disposed within the cylinder 1; the conical body 3 is disposed at the bottom of the cylinder 1 and connected to the bottom end of the central shaft 2, with the maximum outer diameter of the conical body 3 matching the inner diameter of the cylinder 1; the baffle assembly 4 includes a fixing ring 41, multiple baffles 42, and a clamp 43. The fixing ring 41 is fixed to the bottom of the cylinder 1 along its circumference; the upper end of the baffle 42 is rotatably connected to the fixing ring 41, and the lower end of the baffle 42 is a free end; the clamp 43 is fitted onto the outer wall of the cylinder 1 and connected to the conical body 3, with the diameter of the clamp 43 being larger than the diameter of the fixing ring 41. When the central shaft 2 drives the conical body 3 to move axially along the cylinder 1, the clamp 43 can move synchronously with the conical body 3, and the axial displacement of the clamp 43 controls the baffle 42 to switch between the closed state and the open state.
[0041] The cylindrical body 1 of this invention is a vertically arranged cylindrical channel into which silicon material falls from above. The central shaft 2 can move up and down inside the cylindrical body 1, controlled by an external drive mechanism (cylinder, servo motor, etc.). The conical body 3 is fixed at the lower end of the central shaft 2 and is in the shape of an inverted cone. There is only a very small gap between its maximum outer diameter and the inner wall of the cylindrical body 1, which can both push the silicon material downward and form an almost sealing surface when closed to prevent the silicon material from falling out.
[0042] For example, the fixing ring 41 is fixed to the lowest end of the cylinder 1 by welding or snap-fitting, serving as the "hinge support" of the baffle 42. The baffle 42 is evenly arranged on the fixing ring 41 in the circumferential direction. Its upper end is connected to the fixing ring 41 by a pin or flexible hinge, and its lower end is a free end, which facilitates the automatic drooping of the baffle 42 under the action of gravity.
[0043] Preferably, the weight of the lower end of the baffle 42 is greater than the weight of the upper end of the baffle 42.
[0044] By setting the weight of the lower end of the baffle 42 to be greater than the weight of the upper end of the baffle 42, it is beneficial for the baffle 42 to automatically droop and unfold under the action of gravity. For example, the thickness of the lower end of the baffle 42 can be set to be greater than the thickness of the upper end, or a counterweight can be embedded in the lower end of the baffle 42, so that the center of gravity of the baffle 42 is close to the lower end of the baffle 42, thereby realizing the automatic drooping and unfolding of the baffle 42 under the action of gravity.
[0045] Preferably, the distance between the fixing ring 41 and the bottom end of the cylinder 1 is 10mm to 50mm.
[0046] The fixing ring 41 is 10mm to 50mm away from the bottom of the cylinder 1, providing suitable movement space for the baffle 42. When the baffle 42 switches between closed and open states, this distance ensures that the baffle 42 has enough space to rotate, avoiding collision and interference between the baffle 42 and the bottom of the cylinder 1, which would affect its normal movement; it also allows the baffle 42 to effectively shield the water-cooled screen 103 when it is open, achieving the expected protective effect.
[0047] Of course, in other embodiments, the distance between the fixing ring 41 and the bottom end of the cylinder 1 can be flexibly adjusted according to specific working conditions. For example, the distance between the fixing ring 41 and the bottom end of the cylinder 1 can be set to 60mm, 70mm, etc. This utility model does not make a specific limitation on the distance between the fixing ring 41 and the bottom end of the cylinder 1.
[0048] For example, the fixing ring 41 in this invention is made of high-temperature alloy or ceramic fiber composite material, which can withstand high-temperature environment and prevent the fixing ring 41 from failing.
[0049] The clamp 43 can slide up and down on the outer wall of the cylinder 1 and is fixedly connected to the conical body 3. When the central shaft 2 drives the conical body 3 to move up and down, the clamp 43 moves synchronously.
[0050] For example, in this utility model, the baffle 42 and the clamp 43 are made of high-temperature resistant and elastic materials, such as high-temperature alloys or ceramic fiber composite materials, which can withstand high-temperature environments and automatically recover their original shape when subjected to external forces, ensuring the normal use of the baffle 42 and the clamp 43.
[0051] Preferably, such as Figure 1 As shown, a connecting rod 44 is provided between the conical body 3 and the clamp 43. The conical body 3 and the clamp 43 are connected by the connecting rod 44. Multiple connecting rods 44 are provided, and the multiple connecting rods 44 are distributed at intervals. The connecting rods 44 are threadedly connected to the conical body 3.
[0052] Multiple spaced connecting rods 44 can connect the cone 3 and the clamp 43 from multiple positions, increasing the contact points and force-bearing area, making the connection between the cone 3 and the clamp 43 more secure. During the operation of the feeder, especially when the central shaft 2 drives the cone 3 to move axially, the connecting rods 44 can stably transmit force, ensuring that the clamp 43 can move accurately and synchronously with the cone 3, thereby reliably controlling the state switching of the baffle 42 in the baffle assembly 4 and ensuring the shielding effect on the water-cooled screen 103.
[0053] For example, when the central shaft 2 drives the conical body 3 to move upward to the closed position, the clamp 43 moves upward synchronously and abuts against the outer side of the baffle 42, causing each baffle 42 to swing inward and eventually come together to form a closed state. At this time, the baffle 42 is gathered on the outside of the cylinder 1, without interfering with the insertion or removal of the feeder from the single crystal furnace 100.
[0054] When the central shaft 2 drives the conical body 3 to move downward to the feeding position, the clamp 43 moves down and disengages from the baffle 42. The free end of the baffle 42 flips outward under its own weight, forming an unfolded state. At this time, each baffle 42 opens outward in an umbrella shape, blocking the area around the lower end of the water-cooled screen 103 and preventing silicon sputtering.
[0055] Through the above technical solution, when silicon material is re-added, the baffle assembly 4 can effectively shield the water-cooled screen 103, preventing silicon sputtering points from directly contacting the water-cooled screen 103, thereby greatly reducing the risk of damage to the water-cooled screen 103, extending the service life of the water-cooled screen 103, and reducing the cost of equipment maintenance and replacement.
[0056] Furthermore, by avoiding damage to the water-cooled screen 103 caused by silicon sputtering, abnormal crystal pulling situations resulting from damage to the water-cooled screen 103 are reduced. A stable crystal pulling process helps ensure the quality of the produced crystals, improves the product yield, and meets the production requirements of high-quality products.
[0057] Preferably, such as Figure 1 and Figure 3 As shown, the fixing ring 41 includes a connecting part 411 and a mounting part 412. The connecting part 411 and the mounting part 412 are connected in an L-shape. The connecting part 411 is connected to the cylinder 1. The upper surface of the mounting part 412 is provided with a plurality of mounting seats 4121 at intervals. A rotating shaft 4122 is connected between two adjacent mounting seats 4121. The upper end of the baffle 42 is rotatably connected to the rotating shaft 4122. When the baffle 42 is in the unfolded state, the bottom surface of the baffle 42 abuts against the upper surface of the mounting part 412 to limit the position of the baffle 42.
[0058] The fixing ring 41 of this utility model is an integrally formed metal ring, consisting of a connecting part 411 and a mounting part 412. Exemplarily, the connecting part 411 is fixed to the bottom outer wall of the cylinder 1 by bolts or welding. The upper end of the baffle 42 is rotatably connected to the fixing ring 41 via a rotating shaft 4122. When the baffle 42 is in the unfolded state, the bottom surface of the baffle 42 abuts against the upper surface of the mounting part 412, restricting the baffle 42 from continuing to flip outward and ensuring a constant unfolding angle.
[0059] For example, such as Figure 3As shown, 15 mounting seats 4121 are evenly spaced along the circumference on the upper surface of the mounting part 412, and the number of baffles 42 corresponds to the number of mounting seats 4121, which is also 15. Of course, in other embodiments, the number of mounting seats 4121 and baffles 42 can be adjusted according to the diameter of the cylinder 1. The specific number of mounting seats 4121 and baffles 42 is not specifically limited in this utility model.
[0060] Preferably, such as Figure 1 and Figure 2 As shown, a bracket 11 is provided at the top of the cylinder 1, and a positioning hole 111 is provided on the bracket 11. The top of the central shaft 2 passes through the positioning hole 111.
[0061] The positioning hole 111 provides a strict constraint on the top end of the central shaft 2, guiding the movement of the central shaft 2 and ensuring that the central shaft 2 always moves along the correct axial direction.
[0062] Preferably, such as Figure 1 and Figure 2 As shown, near the top of the cylinder 1, a fixed flange 12 and a movable flange 13 are installed at intervals on the outer wall of the cylinder 1. The fixed flange 12 and the movable flange 13 are connected by an adjusting screw 14, and the position of the movable flange 13 can be adjusted by the adjusting screw 14.
[0063] By turning the adjusting screw 14, the axial position of the movable flange 13 relative to the fixed flange 12 can be finely adjusted, thereby facilitating the adjustment of the height of the silicon liquid level in the cylinder 1 and the single crystal furnace 100, so as to better control the distance between the feeder and the hot zone.
[0064] In addition, such as Figure 4 and Figure 5 As shown, this utility model also provides a single crystal furnace 100, which includes a furnace body 101, a crucible 102, a water-cooled screen 103, and the aforementioned feeder. The crucible 102 and the water-cooled screen 103 are disposed inside the furnace body 101, with the water-cooled screen 103 located above the crucible 102. A feeding channel 1011 is provided at the top of the furnace body 101, and the feeder can extend into the feeding channel 1011. When the feeder feeds material into the crucible 102, the baffle 42 can unfold and block the lower end of the water-cooled screen 103.
[0065] The crucible 102 is located inside the furnace body 101 and is used to hold the molten silicon material. The water-cooled screen 103 is located above the crucible 102 and is used to control the temperature of the single crystal silicon rod growth interface. The feeder can extend into the furnace body 101 through the feeding channel 1011. When re-feeding silicon material, the baffle 42 unfolds, thereby blocking the lower end of the water-cooled screen 103 to prevent silicon sputtering from adhering to the inner wall of the water-cooled screen 103, reducing crystal pulling abnormalities, and improving crystal quality and production efficiency.
[0066] Preferably, the baffle 42 matches the shape of the lower end of the water-cooled screen 103.
[0067] By setting the outer contour of the baffle 42 to match the shape of the lower end of the water-cooled screen 103 (for example, if the lower end of the water-cooled screen 103 is circular or arc-shaped, then the baffle 42 will be inverted cone or arc shape after unfolding), the baffle 42 can fit tightly against the lower end of the water-cooled screen 103 after unfolding, achieving full coverage of the lower end of the water-cooled screen 103. This ensures that no matter which direction the molten silicon splashes from, it can be effectively blocked by the baffle 42, thereby greatly improving the protection effect of the water-cooled screen 103.
[0068] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.
Claims
1. A feeder, characterized in that, It includes a cylinder (1), a central shaft (2), a cone (3), and a baffle assembly (4). The central shaft (2) is movably disposed within the cylinder (1); The cone (3) is disposed at the bottom of the cylinder (1) and connected to the bottom end of the central shaft (2), and the maximum outer diameter of the cone (3) is adapted to the inner diameter of the cylinder (1); The baffle assembly (4) includes a fixing ring (41), multiple baffles (42), and a clamp (43). The fixing ring (41) is fixed to the bottom of the cylinder (1) along the circumference of the cylinder (1). The upper end of the baffle (42) is rotatably connected to the fixing ring (41), and the lower end of the baffle (42) is a free end. The clamp (43) is sleeved on the outer wall of the cylinder (1) and connected to the cone (3). The diameter of the clamp (43) is larger than the diameter of the fixing ring (41). When the central shaft (2) drives the cone (3) to move axially along the cylinder (1), the clamp (43) can move synchronously with the cone (3), and the axial displacement of the clamp (43) controls the switching of the baffle (42) between the closed state and the unfolded state.
2. The feeder according to claim 1, characterized in that, The fixing ring (41) includes a connecting part (411) and a mounting part (412). The connecting part (411) and the mounting part (412) are connected in an L-shape. The connecting part (411) is connected to the cylinder (1). The upper surface of the mounting part (412) is provided with a plurality of mounting seats (4121) spaced apart. A rotating shaft (4122) is connected between two adjacent mounting seats (4121). The upper end of the baffle (42) is rotatably connected to the rotating shaft (4122). When the baffle (42) is in the unfolded state, the bottom surface of the baffle (42) abuts against the upper surface of the mounting part (412) to limit the position of the baffle (42).
3. The feeder according to claim 1, characterized in that, The weight of the lower end of the baffle (42) is greater than the weight of the upper end of the baffle (42).
4. The feeder according to claim 1, characterized in that, A connecting rod (44) is provided between the cone (3) and the clamp (43), and the cone (3) and the clamp (43) are connected by the connecting rod (44).
5. The feeder according to claim 4, characterized in that, Multiple connecting rods (44) are provided, and the multiple connecting rods (44) are distributed at intervals; and / or The connecting rod (44) is threadedly connected to the tapered body (3).
6. The feeder according to claim 1, characterized in that, The distance between the fixing ring (41) and the bottom end of the cylinder (1) is 10mm to 50mm.
7. The feeder according to any one of claims 1 to 6, characterized in that, The top of the cylinder (1) is provided with a bracket (11), and the bracket (11) has a positioning hole (111) and the top of the central shaft (2) passes through the positioning hole (111).
8. The feeder according to any one of claims 1 to 6, characterized in that, Near the top of the cylinder (1), a fixed flange (12) and a movable flange (13) are installed at intervals on the outer wall of the cylinder (1). The fixed flange (12) and the movable flange (13) are connected by an adjusting screw (14). The movable flange (13) can be adjusted in position by the adjusting screw (14).
9. A single crystal furnace (100), characterized in that, The device includes a furnace body (101), a crucible (102), a water-cooled screen (103), and a feeder as described in any one of claims 1 to 8. The crucible (102) and the water-cooled screen (103) are disposed inside the furnace body (101), with the water-cooled screen (103) located above the crucible (102). A feeding channel (1011) is provided at the top of the furnace body (101). The feeder can extend into the feeding channel (1011), and when the feeder feeds material into the crucible (102), the baffle (42) can unfold and block the lower end of the water-cooled screen (103).
10. The single crystal furnace (100) according to claim 9, characterized in that, The baffle (42) matches the shape of the lower end of the water-cooled screen (103).