Heater and single crystal furnace

Abstract

The embodiment of the utility model provides a heater and a single crystal furnace, the heater comprises a heating body, and the heating body comprises a plurality of heating petals connected end to end; in at least two adjacent heating petals, the head end of one heating petal is provided with at least one first connecting part, and the tail end of the other heating petal is provided with at least one second connecting part corresponding to the first connecting part; the second connecting part is clamped with the first connecting part; and in the radial direction of the heating body, the thicknesses of the second connecting parts, the first connecting parts and the head ends or the tail ends of the heating petals are the same. And meanwhile, the structural strength of the splicing position of the heating petals and the safety distance between the splicing position and other thermal field components are guaranteed, and virtual connection sparking caused by bolt fixing and bolt hole cracking is avoided.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a heater and a single crystal furnace. Background Technology

[0002] In the field of photovoltaic monocrystalline growth, heaters are used to heat the crucible inside the monocrystalline furnace. These heaters are generally of a split structure, with some heaters using connecting plates and bolts to splice the separate heating elements. Because of this splicing method, the thickness at the splice point is inconsistent with the thickness of the heater body. Furthermore, splicing with connecting plates is prone to loose connections, which can lead to arcing.

[0003] In existing heaters, adjacent heating petals are fixed together by connecting plates. The joints of the heating petals are thinned and spliced, which affects the structural strength of the splicing position. The connecting plates also affect the safe distance between the splicing position and other hot field components, leading to arcing. Utility Model Content

[0004] In view of the above problems, embodiments of the present invention are proposed to provide a heater and a single crystal furnace that overcome or at least partially solve the above problems.

[0005] To address the aforementioned problems, this utility model discloses a heater, comprising: a heating element, wherein the heating element includes: a plurality of heating petals connected end to end;

[0006] In at least two adjacent heating petals, one heating petal has at least one first connecting portion at its front end, and the other heating petal has at least one second connecting portion at its rear end corresponding to the first connecting portion; the second connecting portion engages with the first connecting portion.

[0007] Along the radial direction of the heating element, the second connecting portion, the first connecting portion, and the first or last end of the heating petal have the same thickness.

[0008] The embodiments of this utility model have the following advantages:

[0009] In this embodiment of the invention, in at least two adjacent heating petals, one heating petal has at least one first connecting portion at its leading end, and the other heating petal has at least one second connecting portion at its trailing end. The second connecting portion, the first connecting portion, and the leading or trailing end of the heating petal have the same radial thickness in the heating element. This facilitates ensuring both the structural strength of the joint between the heating petals and the safe distance between the joint and other thermal components. Furthermore, the corresponding second connecting portion and the first connecting portion are interlocked. This allows for a fixed fit between two adjacent heating petals and avoids the use of bolts for fixing and the risk of arcing due to cracked bolt holes. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a heater according to this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the front end of a heating valve according to this utility model;

[0012] Figure 3 This is a front view of the head end of a heating valve according to this utility model;

[0013] Figure 4 This is a schematic diagram of the tail end of a heating valve according to this utility model;

[0014] Figure 5 This is a front view of the tail end of a heating valve according to this utility model;

[0015] Figure 6 This is a schematic diagram of the structure of two adjacent heating petals of this utility model;

[0016] Figure 7 This is a schematic diagram of the assembly of two adjacent heating petals according to this utility model;

[0017] Figure 8 This is a structural schematic diagram of a limiting connector according to this utility model;

[0018] Figure 9 This is a schematic diagram of another corresponding first connecting part and second connecting part of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Heating element; 11. Heating petal; 21. First connecting part; 211. First half hole; 22. Second connecting part; 221. Second half hole; 31. Protruding structure; 311. First protrusion; 312. Second protrusion; 32. Limiting groove; 321. First groove; 322. Second groove; 4. Limiting connector; 5. Heating foot plate. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Firstly, one of the core concepts of this utility model embodiment lies in disclosing a heater, such as... Figures 1 to 5 As shown, the device includes: a heating element 1, which comprises multiple heating petals 11 connected end-to-end; in at least two adjacent heating petals 11, one heating petal 11 has at least one first connecting portion 21 at its leading end, and the other heating petal 11 has at least one second connecting portion 22 at its trailing end; the corresponding second connecting portion 22 engages with the first connecting portion 21. Along the radial direction of the heating element 1, the second connecting portion 22 and the first connecting portion 21 have the same thickness as the leading or trailing end of the heating petal 11. A limiting connector 4 is connected to at least one set of corresponding second connecting portions 22 and first connecting portions 21 to achieve a fixed fit between two adjacent heating petals 11.

[0026] In this embodiment of the invention, in at least two adjacent heating petals 11, one heating petal 11 has at least one first connecting portion 21 at its leading end, and the other heating petal 11 has at least one second connecting portion 22 at its trailing end. The second connecting portion 22, the first connecting portion 21, and the leading or trailing end of the heating petal 11 have the same radial thickness as the heating body 1. This facilitates ensuring the structural strength of the joint of the heating petals 11 and the safe distance between the joint and other thermal field components. Furthermore, the corresponding second connecting portion 22 engages with the first connecting portion 21, enabling a fixed fit between the two adjacent heating petals 11 and avoiding the use of bolts for fixing and the risk of arcing due to cracked bolt holes.

[0027] In this embodiment, the first connecting part 21 and the second connecting part 22 are disposed at the beginning or end of the heating petal 11. Specifically, in one heating petal 11, the first connecting part 21 is disposed at the beginning of the heating petal, and the second connecting part 22 is disposed at the end of the heating petal. Alternatively, the first connecting part 21 and the second connecting part 22 can be disposed at both the beginning and end of the heating petal 11.

[0028] In this embodiment of the invention, the heater can be an electrical appliance that uses electrical energy to achieve a heating effect. It has a wide range of applications, a long lifespan, and high reliability. The core principle of a heater is energy conversion, most commonly the conversion of electrical energy into heat energy. Based on the type of heating method, heaters can be divided into electromagnetic heating, infrared heating, and resistance heating.

[0029] Specifically, the heater can be applied in a single-crystal furnace, specifically to heat the silicon material in a quartz crucible within the furnace for pulling single-crystal silicon rods. Alternatively, the heater can also be used in polycrystalline silicon production and industries requiring high-temperature heating, such as ingot casting, electrical discharge machining, continuous metal casting, and precious metal smelting. This embodiment of the invention uses the application of the heater in a single-crystal furnace for pulling single-crystal silicon rods as an example; other applications can refer to the same settings.

[0030] Specifically, the heater may include a heating element 1, which may include multiple heating petals 11 connected end to end. The heating petals 11 may be arc-shaped, and the heating element 1 may be annular. When the heating element 1 is energized, it can radiate heat to the quartz crucible.

[0031] Specifically, each pair of adjacent heating petals 11 can be spliced ​​and fixed together to form a heating element 1. Among at least two adjacent heating petals 11, the first end of one heating petal 11 can be provided with at least one first connecting part 21, and the tail end of the other heating petal 11 can be provided with at least one second connecting part 22 corresponding to the first connecting part 21. Since the two adjacent heating petals 11 are connected end to end, the corresponding first connecting part 21 and second connecting part 22 can be engaged to realize the assembly between the two adjacent heating petals 11.

[0032] Specifically, each heating petal 11 may have a first connecting part 21 at its front end and a second connecting part 22 at its rear end, so that every two adjacent heating petals 11 can be spliced ​​together through the first connecting part 21 and the second connecting part 22. Alternatively, one, two, or three groups of adjacent heating petals 11 may be spliced ​​together through the first connecting part 21 and the second connecting part 22.

[0033] Specifically, the first connecting part 21, the second connecting part 22 and the heating petal 11 have the same thickness in the radial direction of the heating body 1, so that the safe distance between the first connecting part 21, the second connecting part 22 and other heat field components is consistent with the safe distance between the heating petal 11 and other heat field components. Moreover, the first connecting part 21 and the second connecting part 22 are relatively thick, which helps to ensure the structural strength of the first connecting part 21 and the second connecting part 22, and can reduce the probability of deformation of the first connecting part 21 and the second connecting part 22, thereby ensuring the tightness of the splicing and fitting of the first connecting part 21 and the second connecting part 22.

[0034] For example, in a single crystal furnace, the insulation cylinder can be fitted over the heater, and the minimum distances from the first connecting part 21 to the insulation cylinder, the minimum distances from the second connecting part 22 to the insulation cylinder, and the minimum distances from the heating petal 11 to the insulation cylinder are all the same.

[0035] Specifically, in two adjacent heating petals 11, one heating petal 11 may have one, two or three first connecting parts 21 at its head end, and the other heating petal 11 may have one, two or three second connecting parts 22 at its tail end. The second connecting parts 22 and the first connecting parts 21 may be set in a one-to-one correspondence, and the corresponding second connecting parts 22 and the first connecting parts 21 may be snapped together and fixed.

[0036] Specifically, under the snap-fit ​​action of the first connecting part 21 and the second connecting part 22, the splicing and fixing of two adjacent heating petals 11 can be achieved without the need for bolt fixing, which can avoid the sparking phenomenon caused by bolt hole cracking.

[0037] Optionally, such as Figure 1 As shown, the heater may also include two heating feet 5, which can be connected to the same side of the heating element 1. The two heating feet 5 can be connected to two opposite heating petals 11 respectively. The heating feet 5 can be connected to a power source to transmit an electrical signal to the heating petals 11. The heating petals 11 can generate heat when powered on.

[0038] Specifically, the heating foot plate 5 can be spliced ​​and fixed with the heating petal 11. The specific splicing method can be at least one of bolt connection, snap-fit ​​and adhesive. This embodiment of the utility model does not specifically limit this method.

[0039] In some alternative embodiments, such as Figure 6 and Figure 7 As shown, along the circumference of the heating element 1, one of the first connecting portion 21 and the second connecting portion 22 includes a protrusion structure 31, and the other includes a limiting groove 32; the protrusion structure 31 is engaged in the corresponding limiting groove 32.

[0040] In this embodiment of the utility model, the protruding structure 31 is engaged in the corresponding limiting groove 32, so that the first connecting part 21 and the second connecting part 22 can achieve a concave-convex fit, which facilitates the reliability of splicing and limiting between two adjacent heating petals 11.

[0041] In some embodiments, the first connecting portion 21 may include a protrusion structure 31, and the second connecting portion 22 may include a limiting groove 32. In other embodiments, the first connecting portion 21 may include a limiting groove 32, and the second connecting portion 22 may include a protrusion structure 31. In still other embodiments, the first connecting portion 21 may include both the protrusion structure 31 and the limiting groove 32, and the second connecting portion 22 may include both the limiting groove 32 and the protrusion structure 31. For example, Figure 6 and Figure 7 As shown, the first connecting part 21 includes two protruding structures 31 and a limiting groove 32, and the second connecting part 22 includes two limiting grooves 32 and a protruding structure 31.

[0042] Specifically, the limiting groove 32 is radially connected to the heating element 1, which facilitates ensuring that the thickness of the protruding structure 31 and the limiting groove 32 in the radial direction of the heating element 1 is consistent with that of the heating petal 11, and also facilitates the insertion of the protruding structure 31 into the limiting groove 32. Moreover, the protruding structure 31 can be installed into the limiting groove 32 in the radial direction of the heating element 1, which facilitates the assembly of two adjacent heating petals 11.

[0043] Specifically, the limiting groove 32 has a slot in the circumferential direction of the heating element 1, at least a portion of the protruding structure 31 can be located at the slot, and in some embodiments, the protruding structure 31 can also be inserted into the limiting groove 32 from the slot.

[0044] In some alternative embodiments, on the same heating petal 11, the height of the protrusion 31 in the axial direction of the heating body 1 increases in the direction away from the heating petal 11 to which it is connected; the depth of the limiting groove 32 in the axial direction of the heating body 1 decreases in the direction away from the heating petal 11 to which it is connected. In this way, when the protrusion 31 is inserted into the corresponding limiting groove 32, the first connecting part 21 and the second connecting part 22 can be limited in the axial direction of the heating body 1 and in the circumferential direction of the heating body 1, thereby limiting the two adjacent heating petals 11 from two directions.

[0045] Specifically, the depth of the limiting groove 32 in the axial direction of the heating body 1 decreases in the direction away from the heating petal 11 connected to it, so that the opening of the limiting groove 32 can form a narrow opening, preventing the protruding structure 31 from sliding out of the limiting groove 32 along the circumference of the heating body 1.

[0046] In some alternative embodiments, on the same heating petal 11, the height of the protrusion 31 in the axial direction of the heating body 1 gradually increases in the direction away from the heating petal 11 to which it is connected; the depth of the limiting groove 32 in the axial direction of the heating body 1 gradually decreases in the direction away from the heating petal 11 to which it is connected, so that the sidewalls of the limiting groove 32 can limit the sidewalls of the protrusion 31, thereby increasing the force-bearing area between the first connecting part 21 and the second connecting part 22.

[0047] Specifically, the height of the protrusion 31 along the axial direction of the heating element 1 is away from the heating element connected to it.

[0048] The direction of the petal 11 gradually increases, allowing the protruding structure 31 to form a dovetail joint. The depth of the limiting groove 32 in the axial direction of the heating element 1 gradually decreases in the direction away from the heating petal 11 it is connected to, allowing the limiting groove 32 to form a dovetail groove. The dovetail joint and the dovetail groove fit together, making the first connecting part 21 and the second connecting part 22 fit together more tightly.

[0049] In other alternative embodiments, such as Figure 9 As shown, the protruding structure 31 includes a first protrusion 311 and a second protrusion 312. The first protrusion 311 is connected between the second protrusion 312 and the heating petal 11. The height of the first protrusion 311 in the axial direction of the heating element 1 is less than the height of the second protrusion 312 in the axial direction of the heating element 1. The limiting groove 32 includes a first groove 321 and a second groove 322 that are connected. The first groove 321 is located between the second groove 322 and the heating petal 11. The groove depth of the first groove 321 in the axial direction of the heating element 1 is greater than the groove depth of the second groove 322 in the axial direction of the heating element 1.

[0050] In this embodiment of the invention, the first protrusion 311 is connected between the second protrusion 312 and the heating petal 11, and the first groove 321 is located between the second groove 322 and the heating petal 11. The first protrusion 311 can be locked in the second groove 322, and the second protrusion 312 can be locked in the first groove 321. Since the height of the first protrusion 311 in the axial direction of the heating element 1 is less than the height of the second protrusion 312 in the axial direction of the heating element 1, and the groove depth of the first groove 321 in the axial direction of the heating element 1 is greater than the groove depth of the second groove 322 in the axial direction of the heating element 1, the second groove 322 can limit the second protrusion 312, preventing the second protrusion 312 from sliding out of the first groove 321 along the circumference of the heating element 1.

[0051] In some optional embodiments, the end of the protruding structure 31 away from the heating petal 11 connected thereto and the bottom of the limiting groove 32 are provided with a groove; when the protruding structure 31 and the limiting groove 32 are engaged, a limiting connector 4 is provided in the groove to position the two adjacent heating petals 11, so as to ensure the reliability of splicing and fixing the two adjacent heating petals 11.

[0052] Specifically, the end of the protruding structure 31 away from the heating petal 11 it is connected to may be provided with a groove, the opening of which may face the bottom of the limiting groove 32; or, the bottom of the limiting groove 32 may be provided with a groove, the opening of which may face the protruding structure 31; or, the end of the protruding structure 31 away from the heating petal 11 it is connected to, and the bottom of the limiting groove 32 may be provided with grooves, the openings of the grooves on the two may face each other, and the grooves on the two may be connected.

[0053] Specifically, the limiting connector 4 is connected within the groove, which can limit and fix two adjacent heating petals 11. The limiting connector 4 can also be a screw, which can be screwed into the groove.

[0054] Texture connection.

[0055] Specifically, in at least one corresponding first connecting part 21 and second connecting part 22, the groove on the protruding structure 31 of the first connecting part 21 is the first half-hole 211, and the groove on the bottom wall of the limiting groove of the second connecting part 22 is the second half-hole 221. The second half-hole 221 is spliced ​​with the first half-hole 211. The first half-hole 211 and the second half-hole 221 are both radially connected to the heating element 1. A part of the limiting connector 4 is embedded in the first half-hole 211, and the other part is embedded in the second half-hole 221.

[0056] In this embodiment of the utility model, a portion of the limiting connector 4 is embedded in the first half-hole 211 and the other portion is embedded in the second half-hole 221. The limiting connector 4 can be radially positioned and engaged with the first half-hole 211 and the second half-hole 221, thereby achieving the limiting engagement of the first connecting portion 21 and the second connecting portion 22 in the circumferential and axial directions of the heating element 1.

[0057] In some alternative embodiments, such as Figure 7 and Figure 8 As shown, the limiting connector 4 includes a screw rod, which is threadedly connected to the groove, that is, the screw rod is threadedly connected to the first half hole 211 and the second half hole 221 respectively.

[0058] In this embodiment of the utility model, the screw is threadedly connected to the first half hole 211 and the second half hole 221 respectively, so that the screw can be limited and engaged with the first half hole 211 and the second half hole 221 from the axial direction of the first half hole 211, and the first connecting part 21 and the second connecting part 22 can be radially limited in the heating element 1.

[0059] Specifically, the screw is threaded to the first half-hole 211 and the second half-hole 221 respectively, which can achieve a limiting fit, reduce the force, and prevent the screw from cracking the first half-hole 211 and the second half-hole 221.

[0060] In some alternative embodiments, the heating element 1 includes a connecting adhesive that fills the assembly gap between the protruding structure 31 and the limiting groove 32, which can achieve the bonding and fixing of the first connecting part 21 and the second connecting part 22. The first connecting part 21 and the second connecting part 22 can fit together with zero gap, which greatly reduces the phenomenon of arcing due to poor connection of the heating element.

[0061] In some alternative embodiments, the limiting connector 4 includes a connecting adhesive that fills the first half-hole 211 and the second half-hole 221 respectively.

[0062] In this embodiment of the invention, the first half-hole 211 and the second half-hole 221 are filled with connecting adhesive, so that the connecting adhesive can bond the first connecting part 21 and the second connecting part 22, thereby further improving the reliability of splicing and fixing between two adjacent heating petals 11.

[0063] In some optional embodiments, in two adjacent connected heating petals 11, the first end of one heating petal 11 is provided with at least two protruding structures 31, and a limiting groove 32 is provided between the two protruding structures 31; the tail end of the other heating petal 11 is provided with at least two limiting grooves 32, and the protruding structure 31 is provided between the two limiting grooves 32. Along the circumference of the heating petal 11, the protruding structures 31 and limiting grooves 32 on the two adjacent heating petals 11 are correspondingly arranged and engaged. In this embodiment of the present invention, a multi-level concave-convex fit can be achieved between the two adjacent connected heating petals 11, making the connection between the two adjacent connected heating petals 11 more reliable and stable.

[0064] In this embodiment of the invention, there are multiple splicing methods between two adjacent heating petals 11. Taking the adjacent arrangement of the first heating petal and the second heating petal as an example, the first method involves a dovetail tenon at the beginning of the first heating petal and a dovetail groove at the end of the second heating petal. Conductive adhesive is applied to the groove wall of the dovetail groove, and the dovetail tenon is embedded in the groove. The second method involves a dovetail tenon at the beginning of the first heating petal and a dovetail groove at the end of the second heating petal. A first half-hole 211 is opened at the end of the dovetail tenon, and a second half-hole 221 is opened at the bottom of the limiting groove 32. A screw is screwed into the first half-hole 211 and the second half-hole 221 respectively. The screw can be a rod-shaped structure with a constant diameter or a variable diameter.

[0065] In this embodiment of the utility model, with the cooperation of the first connecting part 21, the second connecting part 22 and the limiting connecting member 4, the two adjacent heating petals 11 can achieve a tight fit without any gaps, which improves the phenomenon of arcing or cracking of the heating element 1 due to gaps, and can improve the service life of the heating element, thereby improving the service life of the heater.

[0066] In some alternative embodiments, combined with Figure 1 As shown, one end of the heating element 1 is connected to a heating foot plate 5; along the axial direction of the heating element 1, the heating petal 11 includes multiple U-shaped structures connected in sequence, with the openings of the U-shaped structures facing the heating foot plate 5. At least a portion of the U-shaped structures have a thickness less at the end away from the heating foot plate 5 than at the end closer to the heating foot plate 5. Specifically, one, two, or more ends of the U-shaped structures between the beginning and end of the heating petal 11 can be thinned, with the thinning height being 1 / 2, 1 / 3, 1 / 4, etc., of the height of the U-shaped structure, depending on the required heater resistance.

[0067] The heater described in this embodiment of the present invention has at least the following advantages:

[0068] In this embodiment of the invention, in at least two adjacent heating petals, one heating petal has at least one first connecting portion at its leading end, and the other heating petal has at least one second connecting portion at its trailing end. The second connecting portion, the first connecting portion, and the leading or trailing end of the heating petal have the same radial thickness in the heating element. This facilitates ensuring the structural strength of the joint between the heating petals and the safe distance between the joint and other thermal field components. Furthermore, the corresponding second connecting portion engages with the first connecting portion, enabling a fixed fit between the two adjacent heating petals and avoiding the use of bolts for fixing and the risk of arcing due to cracked bolt holes.

[0069] Secondly, this utility model discloses a single crystal furnace, including the aforementioned heater.

[0070] Specifically, the single crystal furnace includes a furnace body and an insulation cylinder, a quartz crucible, and a pot side disposed within the furnace body; the heater is also disposed within the furnace body. The pot side surrounds the quartz crucible and serves to support it. The heating element of the heater is arranged around the pot side, allowing the heating element to radiate heat to the pot side, from which heat can be transferred to the quartz crucible. The insulation cylinder is fitted over the heater to provide insulation and prevent heat loss.

[0071] The single crystal furnace described in this embodiment of the present invention has at least the following advantages:

[0072] In this embodiment of the invention, in at least two adjacent heating petals, one heating petal has at least one first connecting portion at its leading end, and the other heating petal has at least one second connecting portion at its trailing end. The second connecting portion, the first connecting portion, and the leading or trailing end of the heating petal have the same radial thickness in the heating element. This facilitates ensuring the structural strength of the joint between the heating petals and the safe distance between the joint and other thermal field components. Furthermore, the corresponding second connecting portion engages with the first connecting portion, enabling a fixed fit between the two adjacent heating petals and avoiding the use of bolts for fixing and the risk of arcing due to cracked bolt holes.

[0073] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0074] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0075] The heater and single crystal furnace provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A heater characterized by, The application relates to a heating body (1) comprising a plurality of head-to-tail connected heating petals (11). At least two adjacent heating petals (11), the head end of one heating petal (11) is provided with at least one first connecting part (21), and the tail end of the other heating petal (11) is provided with at least one second connecting part (22) corresponding to the first connecting part (21); the second connecting part (22) is clamped with the first connecting part (21). Along the radial direction of the heating body (1), the thickness of the second connecting part (22), the first connecting part (21) and the head end or tail end of the heating petal (11) is the same. Along the circumferential direction of the heating body (1), one of the first connecting part (21) and the second connecting part (22) comprises a convex structure (31), and the other comprises a limiting groove (32). The convex structure (31) is clamped in the corresponding limiting groove (32). On the same heating petal (11), the height of the convex structure (31) in the axial direction of the heating body (1) increases in the direction away from the heating petal (11).

2. The heater of claim 1, wherein The depth of the limiting groove (32) in the axial direction of the heating body (1) decreases in the direction away from the heating petal (11). The convex structure (31) comprises a first convex part (311) and a second convex part (312), the first convex part (311) is connected between the second convex part (312) and the heating petal (11), and the height of the first convex part (311) in the axial direction of the heating body (1) is smaller than the height of the second convex part (312) in the axial direction of the heating body (1).

3. The heater of claim 2, wherein, The limiting groove (32) comprises a first groove part (321) and a second groove part (322) in communication, the first groove part (321) is located between the second groove part (322) and the heating petal (11), and the groove depth of the first groove part (321) in the axial direction of the heating body (1) is greater than the groove depth of the second groove part (322) in the axial direction of the heating body (1). At least one of the end of the convex structure (31) away from the heating petal (11) connected with the convex structure (31) and the groove bottom of the limiting groove (32) is provided with a groove.

4. The heater of claim 1, wherein When the convex structure (31) and the limiting groove (32) are clamped, a limiting connecting piece (4) is arranged in the groove for positioning the two adjacent heating petals (11). The limiting connecting piece (4) comprises a screw rod which is threadedly connected with the groove.

5. The heater of claim 4, wherein, The heating body (1) comprises connecting glue.

6. The heater according to any one of claims 1 to 5, wherein The connecting glue is filled in the assembly gap between the convex structure (31) and the limiting groove (32). In the two adjacent connected heating petals (11), the head end of one heating petal (11) is provided with at least two convex structures (31), and the limiting groove (32) is arranged between the two convex structures (31); and the tail end of the other heating petal (11) is provided with at least two limiting grooves (32), and the convex structure (31) is arranged between the two limiting grooves (32).

7. The heater according to any one of claims 1 to 5, wherein ​ 8. The heater according to any one of claims 1 to 5, wherein One end of the heating body (1) is connected with a heating foot plate (5); Along the axial direction of the heating body (1), the heating petals (11) comprise a plurality of U-shaped structures connected in sequence, and the openings of the U-shaped structures are directed to the side of the heating foot plate (5); At least part of the U-shaped structures, the thickness of the end away from the heating foot plate (5) is less than the thickness of the end close to the heating foot plate (5).

9. A single crystal furnace characterized by comprising: The heater comprises the heating body (1) according to any one of claims 1-8.

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