A single crystal furnace
By independently controlling the lifting devices of the guide tube and the water-cooled screen in the single crystal furnace, the high energy consumption problem caused by the simultaneous lifting of the water-cooled screen and the guide tube was solved, and the energy consumption reduction effect in the melting and re-feeding processes was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 四川永祥光伏科技有限公司
- Filing Date
- 2025-04-21
- Publication Date
- 2026-05-26
AI Technical Summary
The simultaneous lifting of the water-cooled screen and the flow guide tube in the single crystal furnace results in high energy consumption, which limits the energy saving and process adjustment of the single crystal furnace. The photovoltaic crystal pulling industry needs to reduce energy consumption and costs.
By setting independent first and second lifting devices in the single crystal furnace to control the lifting and lowering of the guide tube and the water-cooled screen respectively, the water-cooled screen is lifted to the upper part when the guide tube is at the lower part, reducing the heat field carried away by the water-cooled screen, while the guide tube at the lower part increases the heat field insulation.
The goal of reducing energy consumption in the melting and re-feeding processes was achieved by independently controlling the lifting method of the guide tube and water-cooled screen, reducing the heat field carried away by the water-cooled screen and increasing the heat preservation effect of the guide tube, thereby reducing energy consumption.
Smart Images
Figure CN224280544U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, specifically to a single crystal furnace. Background Technology
[0002] Currently, in the photovoltaic industry, the Czochralski method for producing monocrystalline silicon typically uses a water-cooled screen device to increase the crystal pulling speed. The water-cooled screen has a flow guide tube lifting device in the thermal field component, and the flow guide tube is lifted at the same time when the water-cooled screen is lifted.
[0003] However, simultaneously improving the water-cooled screen and the flow guide tube has significant limitations on energy saving and process adjustment of the single crystal furnace. Photovoltaic crystal pulling is also a high-power-consuming industry. How to reduce the energy consumption of each process in the crystal pulling process and reduce the cost of crystal pulling has become an urgent problem that the industry needs to solve. Utility Model Content
[0004] The purpose of this invention is to develop a single-crystal furnace that reduces energy consumption by separately controlling the lifting and lowering of the guide tube and the water-cooled screen.
[0005] This utility model is achieved through the following technical solution:
[0006] A single crystal furnace, comprising:
[0007] Single crystal furnace body;
[0008] The flow guide tube and water-cooled screen are located inside the single crystal furnace body;
[0009] The guide tube is connected to a first lifting device, and the water-cooled screen is connected to a second lifting device. The first lifting device and the second lifting device are driven by different driving mechanisms to lift and lower.
[0010] Optionally, the first lifting device includes at least one first lifting rod, which is connected to the guide tube.
[0011] Optionally, the first lifting rod is L-shaped and includes a first horizontal section and a first vertical section that are perpendicularly connected to each other. The first horizontal section extends horizontally away from the guide tube, and the first vertical section is connected to the end of the first horizontal section away from the guide tube. The end of the first horizontal section away from the first vertical section is connected to the guide tube.
[0012] Optionally, the top of the guide tube is provided with a second connecting block, and the end of the first horizontal section is provided with a first connecting block that engages with the second connecting block.
[0013] Optionally, the second connecting block includes a coaxially connected locking rod and a circular top cover. The locking rod is connected to the top of the guide tube, and the first connecting block is provided with a locking groove that mates with the locking rod.
[0014] Optionally, the outer diameter of the locking rod is smaller than that of the top cover, and the width of the locking groove is smaller than that of the outer diameter of the top cover.
[0015] Optionally, the top end face of the guide tube is provided with two second connecting blocks. The two second connecting blocks are symmetrically arranged and located on the same radial direction of the guide tube. The two first connecting blocks connected to the two second connecting blocks are symmetrical about the center of the guide tube.
[0016] Optionally, the second lifting device includes an L-shaped second lifting rod, which includes a second horizontal section and a second vertical section that are perpendicularly connected to each other. The second horizontal section extends away from the water-cooled screen, and the second vertical section is connected to the end of the second horizontal section away from the water-cooled screen. A vertically arranged connecting rod is connected to the end of the second horizontal section near the water-cooled screen, and the connecting rod is connected to the inner wall of the water-cooled screen.
[0017] Optionally, the second lifting device includes two second lifting rods, which are symmetrically arranged on both sides of the water-cooled screen and on the same radial direction of the water-cooled screen.
[0018] Optionally, the top of the single crystal furnace body is provided with a furnace cover, and the top cover is provided with through holes at corresponding positions for the first lifting device and the second lifting device to pass through.
[0019] The beneficial effects of this utility model are:
[0020] This invention addresses a current industry challenge by using a first lifting device and a second lifting device to separately lift the guide tube and the water-cooled screen. During the melting and re-feeding processes, the guide tube can be positioned at the bottom and the water-cooled screen at the top, reducing the heat field carried away by the water-cooled screen. At the same time, the lower position of the guide tube also increases the upper insulation of the heat field, thus achieving the goal of reducing energy consumption from both aspects. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a structural diagram of the present utility model;
[0023] Figure 2 This is a diagram of the internal structure of the single crystal furnace body;
[0024] Figure 3 This is a structural diagram of the interior of the single crystal furnace from another perspective.
[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle.
[0026] Reference numerals in the attached drawings: 1. Single crystal furnace body; 2. Furnace cover; 3. Through hole; 4. Flow guide tube; 5. Water-cooled screen; 6. First lifting device; 61. First lifting rod; 62. First connecting block; 63. Second connecting block; 64. Slot; 7. Second lifting device; 71. Second lifting rod; 72. Connecting rod. Detailed Implementation
[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0029] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0031] like Figures 1-4 As shown, this utility model discloses a single crystal furnace, including a single crystal furnace body 1, a furnace cover 2 on the top of the single crystal furnace body 1, a flow guide cylinder 4 and a water-cooled screen 5 inside the single crystal furnace body 1, a first lifting device 6 on the flow guide cylinder 4, and a second lifting device 7 on the water-cooled screen 5.
[0032] The guide tube 4 is cylindrical, and its diameter gradually decreases from top to bottom, forming a frustum shape. The first lifting device 6 includes two first connecting blocks 62 and two second connecting blocks 63 disposed on the top end face of the guide tube 4. The two second connecting blocks 63 are symmetrically arranged and located on the same radial direction of the guide tube 4.
[0033] Each of the two first connecting blocks 62 is connected to a first lifting rod 61. The first lifting rod 61 is L-shaped and includes a first horizontal section and a first vertical section that are perpendicularly connected to each other. The first horizontal section extends horizontally away from the axial direction of the guide tube 4, and the first vertical section is connected to the end of the first horizontal section away from the guide tube 4. The first horizontal section is connected to the first connecting block 62.
[0034] The second connecting block 63 includes a circular base, a clamping rod, and a circular top cover that are coaxially connected in sequence. The outer diameter of the clamping rod is smaller than that of the base and the top cover. The base is connected to the top of the guide tube 4. The top of the base is a frustum-shaped cone with a gradually decreasing diameter.
[0035] The first connecting block 62 is provided with a slot 64 that mates with the locking rod. The width of the slot 64 is smaller than the outer diameter of the top cover, allowing the locking rod to slide into the slot 64, thereby engaging the first connecting block 62 with the second connecting block 63, and thus engaging the guide tube 4 with the first lifting device 6. The two first connecting blocks 62 are symmetrical about the center of the guide tube 4, therefore the slots 64 of the two first connecting blocks 62 face opposite directions.
[0036] The water-cooled screen 5 is cylindrical, and its diameter gradually decreases from top to bottom, forming a frustum shape. The water-cooled screen 5 is located inside the guide tube 4. The second lifting device 7 includes two second lifting rods 71 symmetrically arranged on both sides of the water-cooled screen 5. The two second lifting rods 71 are located on the same radial direction of the water-cooled screen 5. The second lifting rods 71 are L-shaped and include a second horizontal section and a second vertical section that are perpendicularly connected to each other. The second horizontal section extends away from the water-cooled screen 5, and the second vertical section is connected to the end of the second horizontal section away from the water-cooled screen 5. The end of the second horizontal section near the water-cooled screen 5 is connected to a vertically arranged connecting rod 72, which is connected to the inner wall of the water-cooled screen 5.
[0037] The first lifting rod 61 and the second lifting rod 71 are offset in the circumferential direction of the guide tube 4 and the water-cooled screen 5, that is, there is an angle between the projection of the first horizontal segment and the second horizontal segment on the horizontal plane, so as to reserve installation space for the drive mechanism connected to the first lifting rod 61 and the second lifting rod 71. The first lifting rod 61 and the second lifting rod 71 are driven by different drive mechanisms to perform vertical lifting and lowering.
[0038] The top cover has a through hole 3 at the corresponding position for the first vertical section and the second vertical section to pass through.
[0039] This invention addresses a current industry challenge by using a first lifting device 6 and a second lifting device 7 to separately lift the guide cylinder 4 and the water-cooled screen 5. During the melting and re-feeding processes, the guide cylinder 4 is positioned at the bottom while the water-cooled screen 5 is lifted to the top, reducing the heat field carried away by the water-cooled screen 5. At the same time, the lower position of the guide cylinder 4 also provides upper insulation for the heat field, thus achieving the goal of reducing energy consumption from both aspects.
[0040] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.
Claims
1. A single crystal furnace characterized by comprising: include: Single crystal furnace body; The flow guide tube and water-cooled screen are located inside the single crystal furnace body; The guide tube is connected to a first lifting device, and the water-cooled screen is connected to a second lifting device. The first lifting device and the second lifting device are driven by different driving mechanisms to lift and lower.
2. The single crystal furnace of claim 1, wherein The first lifting device includes at least one first lifting rod, which is connected to the guide tube.
3. The single crystal furnace according to claim 2, characterized in that, The first lifting rod is L-shaped and includes a first horizontal section and a first vertical section that are perpendicularly connected to each other. The first horizontal section extends horizontally away from the guide tube, and the first vertical section is connected to the end of the first horizontal section away from the guide tube. The end of the first horizontal section away from the first vertical section is connected to the guide tube.
4. The single crystal furnace according to claim 3, characterized in that, The top of the guide tube is provided with a second connecting block, and the end of the first horizontal section is provided with a first connecting block that engages with the second connecting block.
5. The single crystal furnace according to claim 4, characterized in that, The second connecting block includes a coaxially connected locking rod and a circular top cover. The locking rod is connected to the top of the guide tube, and the first connecting block is provided with a locking groove that cooperates with the locking rod.
6. The single crystal furnace according to claim 5, characterized in that, The outer diameter of the locking rod is smaller than that of the top cover, and the width of the locking groove is smaller than that of the outer diameter of the top cover.
7. The single crystal furnace according to claim 6, characterized in that, The top end face of the guide tube is provided with two second connecting blocks. The two second connecting blocks are symmetrically arranged and located on the same radial direction of the guide tube. The two first connecting blocks connected to the two second connecting blocks are symmetrical about the center of the guide tube.
8. The single crystal furnace according to claim 1, characterized in that, The second lifting device includes an L-shaped second lifting rod, which includes a second horizontal section and a second vertical section that are perpendicularly connected to each other. The second horizontal section extends away from the water-cooled screen, and the second vertical section is connected to the end of the second horizontal section away from the water-cooled screen. The end of the second horizontal section near the water-cooled screen is connected to a vertically arranged connecting rod, which is connected to the inner wall of the water-cooled screen.
9. The single crystal furnace according to claim 8, characterized in that, The second lifting device includes two second lifting rods, which are symmetrically arranged on both sides of the water-cooled screen and on the same radial direction of the water-cooled screen.
10. The single crystal furnace according to any one of claims 1 to 9, characterized in that, The top of the single crystal furnace body is provided with a furnace cover, and the furnace cover is provided with through holes at corresponding positions for the first lifting device and the second lifting device to pass through.