A gas guiding cylinder and a single crystal furnace with reduced power consumption

Abstract

The utility model discloses a kind of air guide tubes with reduced power consumption, including air guide tube body, it is characterized in that, the cavity is formed from the top center to the bottom center of the air guide tube body, the air guide section is formed in the cavity along top and bottom, and the diameter of air guide section is greater than the inner diameter of cavity, the top of the air guide tube body is provided with air guide cover, the inner wall surface of lower chamber to the outside of air guide cover is penetrated and is provided with multiple air holes, by necking air guide tube, and air guide cover with side air inlet is set in the top of air guide tube, when dirty argon in furnace moves towards air guide tube, it will first contact with the upper surface of air guide cover cover, after contact, the flow direction of argon can be changed, so argon flow speed can be weakened, and because the middle diameter in the air guide tube body is less than the diameter of two ends, the flow of argon will decrease, so heat carried away by argon when flowing can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of solar monocrystalline silicon manufacturing technology, specifically to a gas guide tube and monocrystalline furnace that can reduce power consumption. Background Technology

[0002] The monocrystalline silicon industry is notorious for its high energy consumption. In the monocrystalline silicon pulling process, the vast majority of energy consumption (approximately 80%-90%) is concentrated in the operation of the "crystal pulling furnace," with the main heater being the most significant energy consumer. During operation, the main heater needs to melt the polycrystalline silicon material in the quartz crucible and continuously maintain it above the melting point of silicon (approximately 1414°C), which constitutes the largest source of energy consumption. With the continuous rise in electricity prices, how to reduce energy consumption and power consumption during the monocrystalline silicon growth process to minimize costs and improve corporate profitability has become a key research and development topic for monocrystalline silicon manufacturers.

[0003] Currently, the most common power reduction measures in the industry mainly involve increasing the number and thickness of "insulation barrels (complete insulation systems)" around, at the top and bottom of the single crystal furnace's hot zone to lock in heat. Some manufacturers also supplement this with soft felts with low thermal conductivity for insulation. For example, they fill the gaps between the graphite hard felt layers in the side insulation barrels with adhesive-based soft felt or PAN soft felt, or they use soft felt as a wrapping layer, directly wrapped around the heater to achieve a heat insulation effect. However, while these methods achieve the goals of heat preservation and energy saving by increasing the thickness and number of insulation barrels, the increased thickness also leads to a larger volume, which in turn increases the cost of the insulation barrels. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gas guide tube and single crystal furnace that can reduce power consumption. By improving the exhaust structure to reduce the amount of argon gas discharged, the heat carried away by the argon gas in the furnace is reduced, thereby achieving the goal of reducing energy consumption.

[0005] This utility model is achieved through the following technical solution: A power-reducing air guide tube includes an air guide tube body, characterized in that a cavity is formed from the top center to the bottom center of the air guide tube body, and air guide sections are formed along the top and bottom of the cavity, with the diameter of the air guide sections being larger than the inner diameter of the cavity. An air guide hood is provided on the top of the air guide tube body, and a lower chamber communicating with the cavity is opened on the lower surface of the air guide hood. Multiple air holes are opened along the circumferential direction from the inner wall of the lower chamber to the outer side of the air guide hood, and the air holes are symmetrically arranged on the inner walls of opposite sides of the lower chamber.

[0006] Furthermore, the upper surface of the air guide hood is provided with an upper chamber, and the upper chamber is separated from the lower chamber. The upper surface of the air guide hood is provided with an air guide hood cover.

[0007] Furthermore, the bottom of the air guide cover has a flange with an annular structure, and the diameter of the flange is adapted to the inner diameter of the upper chamber of the air guide cover. A first heat-insulating soft felt layer is provided in the upper chamber of the air guide cover.

[0008] Furthermore, the three-dimensional shape of the air guide hood, the air guide cylinder body, and the air guide hood cover is a cylinder.

[0009] Furthermore, the top of the air guide cylinder body and the lower surface of the air guide shroud are provided with mating parts and connecting parts that cooperate with each other, wherein the longitudinal section of the mating parts and connecting parts is stepped.

[0010] Furthermore, the outer wall of the air guide cylinder body is provided with a circular annular receiving groove along the circumferential direction, and a second heat-insulating soft felt layer is provided in the receiving groove.

[0011] Furthermore, the total thickness of the second insulating soft felt layer after wrapping should be adapted to the depth of the receiving groove.

[0012] Furthermore, the three-dimensional structure of the air guide section is frustum-shaped.

[0013] A single crystal furnace includes a mounting hole and a gas guide tube that can reduce power consumption, wherein the middle portion of the outer wall of the gas guide tube is disposed within the mounting hole.

[0014] Furthermore, the bottom of the single crystal furnace is provided with a heat-insulating felt, and the mounting holes are symmetrically opened on the bottom surface and the bottom end surface of the single crystal furnace, as well as on the upper and lower end surfaces of the heat-insulating felt, and the multiple mounting holes are interconnected. The air guide cover is set above the mounting holes of the heat-insulating felt.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. This utility model features a necked design for the gas guide tube and a side-inlet gas guide hood at the top of the gas guide tube. When dirty argon gas moves towards the gas guide tube, it first contacts the upper surface of the gas guide hood. After contact, the argon gas is redirected and blown around the gas guide hood. Subsequently, the argon gas enters the cavity of the gas guide tube through the air holes of the gas guide hood. This process changes the flow direction of the argon gas, weakens the flow speed of the argon gas, and further reduces the flow rate of the argon gas because the middle diameter of the gas guide tube is smaller than the diameters at both ends. This reduces the heat carried away by the argon gas during flow, thereby reducing power consumption.

[0016] 2. This utility model provides a first heat-insulating soft felt layer and a second heat-insulating soft felt layer on the outer periphery of the air guide cylinder and the upper surface of the air guide cover, respectively. When heat is transferred in the furnace, the low thermal conductivity of the heat-insulating soft felt layer can reduce the direct transfer of heat from the furnace to the bottom air guide cylinder, thus achieving the effect of heat preservation and energy saving. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a front structural perspective view of the air guide tube of this utility model.

[0018] Figure 2 This is a schematic diagram showing the installation and assembly of the air guide tube and the thermal insulation soft felt layer of this utility model.

[0019] Figure 3 This is a schematic diagram of the air guide cover and air hole installation structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the installation of the gas guide tube and the single crystal furnace of this utility model.

[0021] 1-Air guide hood; 2-Air guide cylinder body; 3-Air guide hood cover; 4-First thermal insulation soft felt layer; 5-Second thermal insulation soft felt layer; 6-Mounting hole; 7-Insulation fixing felt; Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0024] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0025] Furthermore, for clarity and brevity, descriptions of well-known structures, functions, and configurations may have been omitted. Those skilled in the art will recognize that various changes and modifications can be made to the examples described herein without departing from the spirit and scope of this disclosure.

[0026] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0028] Example 1 A power-saving air guide tube includes an air guide tube body 2, an air guide shroud 1 disposed on the top of the air guide tube body 2, and an air guide shroud cover 3 disposed on the upper surface of the air guide shroud 1. A cavity for airflow is formed from the top center to the bottom center of the air guide tube body 2. An air guide section is formed along the top and bottom of the cavity. The air guide section is integrally formed with the cavity. The diameter of the air guide section is larger than the diameter of the cavity. The upper and lower surfaces of the air guide shroud 1 have mutually separated chambers, including an upper chamber and a lower chamber. The upper chamber is located on the upper surface of the air guide shroud cover 3, and the lower chamber is located on the lower surface of the air guide shroud 1. The lower chamber is interconnected with the cavity of the air guide tube body 2. Several air holes are formed along the circumferential direction from the inner wall of the lower chamber to the outer side of the air guide shroud 1.

[0029] In existing technologies, the gas guide tube is generally installed at the bottom (i.e., chassis) of the single crystal furnace. Its main function is to allow the "dirty" argon gas inside the furnace to be discharged. The existing gas guide tube is installed vertically, and the gas guiding direction is vertical. This causes the argon gas to pass through the gas guide tube body 2 quickly. When the argon gas flows, it carries away heat, which causes the heat inside the furnace to be lost quickly. When it is necessary to maintain the temperature inside the furnace, the heater needs to be heated and the power consumption increases. This solution involves installing a gas guide hood 1 and a gas guide hood cover 3 on the gas guide cylinder body 2. When dirty argon gas moves towards the gas guide cylinder body 2, it first contacts the upper surface of the gas guide hood cover 3. After contact, the argon gas is redirected and blown around the gas guide hood 1. Subsequently, the argon gas enters the cavity of the gas guide cylinder body 2 through the air holes of the gas guide hood 1. This process changes the flow direction of the argon gas and weakens its flow speed, allowing the argon gas to remain in the furnace for a longer time. Secondly, since the middle diameter of the gas guide cylinder body 2 is smaller than the diameters at both ends, the flow rate of the argon gas is further reduced. This reduces the heat carried away by the argon gas during its flow, thereby reducing power consumption. Furthermore, since the diameter of the bottom of the gas guide tube body 2 is larger than the diameter of the middle part of the gas guide tube body 2, when argon gas enters the wide channel from the narrow channel, due to the septum effect, the gas velocity will decrease after the argon gas enters the wide channel from the narrow channel. This can suppress the turbulence of the airflow, thereby reducing the heat loss carried by the argon gas during movement.

[0030] Specifically, such as Figure 3 As shown, the pores are arranged at equal intervals and symmetrically on the inner walls of opposite sides of the lower chamber. This design ensures that when argon gas is blown in through the two symmetrical pores, the two opposing airflows cancel each other out and dissipate kinetic energy upon meeting. This creates a buffer zone in the middle of the chamber, allowing the high-speed argon gas to collide and mix, ultimately causing the argon gas flow rate to decrease rapidly.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the air guide shroud 1, air guide cylinder body 2, and air guide shroud cover 3 are cylindrical in shape. The top of the air guide cylinder body 2 and the lower surface of the air guide shroud 1 have mating joints and connecting parts. The longitudinal sections of the mating joints and connecting parts are stepped. This design allows the air guide shroud 1 to be installed in conjunction with the air guide cylinder body 2 via the stepped mating joints and connecting parts. Simultaneously, a ring-shaped flange is formed at the bottom of the air guide shroud cover 3. The diameter of this flange matches the inner diameter of the upper chamber of the air guide shroud 1. This design allows the air guide shroud cover 3 to be securely installed on top of the air guide shroud 1 via the flange and the inner wall of the upper chamber.

[0032] Specifically, such as Figure 1 As shown, the preferred three-dimensional structure of the air guide section is a frustum shape. The frustum shape of the air guide section allows argon gas to smoothly transition from the upper part of the air guide tube to the middle part, which helps to stabilize the airflow.

[0033] Example 2 The purpose of this embodiment 2 is to solve the problem that existing gas guide tubes, due to the lack of a soft felt in the vertical direction, easily transfer heat from the hot zone of the single crystal furnace to the furnace bottom, causing heat accumulation at the gas guide tube at the furnace bottom. To address this, a first insulating soft felt layer 4 is provided in the upper chamber of the gas guide hood 1. The main function of the first insulating soft felt layer 4 is to insulate the top of the gas guide tube body 2, thus reducing the direct transfer of heat from the furnace to the furnace bottom, thereby achieving the effect of heat preservation and energy saving.

[0034] On the other hand, since the upper surface of the gas guide cover 1 is provided with a gas guide cover 3, and the first heat insulation soft felt layer 4 is provided between the gas guide cover 3 and the upper chamber, when silicon leakage occurs, the gas guide cover 3 and the first heat insulation soft felt layer 4 can block the leaked high-temperature silicon liquid, thus forming a double-layer protection effect, thereby preventing the silicon liquid from scalding through the argon gas pipe or furnace bottom.

[0035] Specifically, such as Figure 2As shown, a circular groove with a circumferential structure is formed in the middle part of the outer wall of the air guide cylinder body 2. A second insulating soft felt layer 5 is placed inside this groove. During installation, the second insulating soft felt layer 5 is wrapped around the outer circumference of the groove. After wrapping to a predetermined thickness, it is secured with molybdenum wire. It should be noted that the total thickness of the second insulating soft felt layer 5 after wrapping should be compatible with the depth of the groove. This design ensures that after wrapping and securing, the outer surface of the second insulating soft felt layer 5 is flush with or slightly lower than the outer wall of the air guide cylinder body 2, thus providing effective protection, maintaining the tightness of the wrapping, and ensuring the effectiveness of the insulation layer.

[0036] Of course, this utility model does not limit the specific materials of the first thermal insulation soft felt layer 4 and the second thermal insulation soft felt layer 5. Preferably, the first thermal insulation soft felt layer 4 and the second thermal insulation soft felt layer 5 can be made of viscose-based soft felt or PAN soft felt with low thermal conductivity.

[0037] Specifically, such as Figure 4 As shown, this utility model also provides a single crystal furnace equipped with the gas guide tube as described above. The bottom of the single crystal furnace has several layers of heat-insulating felt 7. Symmetrical mounting holes 6 are provided on the bottom surface of the furnace and the upper and lower surfaces of the heat-insulating felt 7, and these mounting holes 6 are interconnected. In use, the middle part of the outer wall of the gas guide tube body 2 can be fitted into the mounting holes of the furnace bottom and the heat-insulating felt 7. Then, the gas guide cover 1 is placed above the mounting holes 6 of the heat-insulating felt 7. After installation, the argon gas inside the single crystal furnace can be discharged through the gas guide tube.

[0038] The working principle of this utility model is as follows: First, the gas guide tube body 2 of this solution is installed at the bottom of the single crystal furnace. Then, the gas guide hood 1 is installed. Next, the first heat-insulating soft felt layer 4 is placed in the upper chamber of the gas guide hood 1. After the first heat-insulating soft felt layer 4 is placed, the gas guide hood cover 3 is installed on the upper surface of the gas guide hood 1. Then, a second heat-insulating soft felt layer 5 of corresponding thickness is wrapped in the receiving cavity around the outer periphery of the gas guide tube body 2. In this way, the cooperation of the first heat-insulating soft felt layer 4 and the second heat-insulating soft felt layer 5 can reduce the heat that will be transferred to the bottom of the furnace through the gas guide tube, thus reducing the problem of heat accumulation in the gas guide tube at the bottom of the furnace.

[0039] On the other hand, when the dirty argon gas in the furnace moves towards the gas guide tube, it first contacts the upper surface of the gas guide cover 3. After contact, the argon gas is redirected and blown around the gas guide cover 1. Subsequently, the argon gas enters the cavity of the gas guide tube body 2 through the air holes of the gas guide cover 1. This process changes the flow direction of the argon gas and weakens its flow velocity, allowing the argon gas to remain in the furnace for a longer time. Furthermore, since the middle diameter of the gas guide tube body 2 is smaller than the diameters at both ends, the flow rate of the argon gas is further reduced. This reduces the heat carried away by the argon gas during its flow, thereby reducing power consumption.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power-saving air guide tube, comprising an air guide tube body (2), characterized in that, The air guide cylinder body (2) has a cavity formed from the top center to the bottom center. The cavity has air guide sections formed along the top and bottom, and the diameter of the air guide sections is larger than the inner diameter of the cavity. The air guide cylinder body (2) has an air guide hood (1) on its top, and the lower surface of the air guide hood (1) has a lower chamber that communicates with the cavity. Multiple air holes are formed along the circumferential direction between the inner wall of the lower chamber and the outer side of the air guide hood (1), and the air holes are symmetrically arranged on the inner walls of opposite sides of the lower chamber.

2. The air guide tube with reduced power consumption according to claim 1, characterized in that, The upper surface of the air guide hood (1) is provided with an upper chamber, and the upper chamber and the lower chamber are separated from each other. The upper surface of the air guide hood (1) is provided with an air guide hood cover (3).

3. The air guide tube with reduced power consumption according to claim 2, characterized in that, The bottom of the air guide cover (3) has a flange with a circular structure, and the diameter of the flange is adapted to the inner diameter of the upper chamber of the air guide cover (1). The upper chamber of the air guide cover (1) is provided with a first heat-insulating soft felt layer (4).

4. The air guide tube with reduced power consumption according to claim 2, characterized in that, The air guide cover (1), the air guide cylinder body (2), and the air guide cover (3) are cylindrical in shape.

5. The air guide tube with reduced power consumption according to claim 4, characterized in that, The top of the air guide cylinder body (2) and the lower surface of the air guide cover (1) are provided with a mating part and a connecting part that cooperate with each other, wherein the longitudinal section of the mating part and the connecting part is stepped.

6. The air guide tube with reduced power consumption according to claim 1, characterized in that, The outer wall of the air guide cylinder body (2) is provided with a circular ring structure receiving groove along the circumference direction, and a second heat-insulating soft felt layer (5) is provided in the receiving groove.

7. The air guide tube with reduced power consumption according to claim 6, characterized in that, The total thickness of the second insulating soft felt layer (5) after wrapping should be compatible with the depth of the receiving groove.

8. The air guide tube with reduced power consumption according to claim 1, characterized in that, The air guide section has a three-dimensional structure in the shape of a frustum.

9. A single crystal furnace, comprising a mounting hole (6) and a gas guide tube as described in any one of claims 1-8, characterized in that: The middle part of the outer wall of the air guide tube is set inside the mounting hole (6).

10. A single crystal furnace according to claim 9, characterized in that, The bottom of the single crystal furnace is provided with a heat-insulating felt (7). The mounting holes (6) are symmetrically opened on the bottom surface and bottom end surface of the single crystal furnace, as well as on the upper and lower end surfaces of the heat-insulating felt (7). The multiple mounting holes (6) are interconnected. The air guide hood (1) is set above the mounting holes (6) of the heat-insulating felt (7).

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