Bottom heater based on graphite heating characteristic optimization

Abstract

The utility model relates to the field of heaters, in particular to a bottom heater based on graphite heating characteristic optimization. The graphite heating characteristic optimized bottom heater comprises two terminals arranged at two ends and a graphite resistor arranged between the two terminals, the graphite resistor adopts double rows of resistor strips, and the resistor strips are bent in an S shape. From left to right, one of the resistor strips is provided with short, medium and long S-shaped bends; the other resistor strip is provided with long, middle and short S-shaped bends; the short S-shaped bend and the long S-shaped bend in one resistor strip are respectively arranged close to the long S-shaped bend and the short S-shaped bend in the other resistor strip; the two S-shaped bends in the two resistor strips are arranged away from each other, and a window is arranged between the two S-shaped bends. The bottom heater provided by the utility model can isolate a heating part of a heated object and weaken an induced magnetic field at the same time, so that the heating uniformity of the object is improved, and faults caused by too fast local temperature rise of the object are reduced.

Description

Technical Field

[0001] This utility model relates to the field of heaters, specifically to graphite heaters. Background Technology

[0002] Graphite possesses excellent thermal conductivity, making it widely used in heaters. Graphite boats used for heating crystalline silicon employ graphite-based bottom heaters. These heaters provide a stable heat source and rapidly transfer heat to the object being heated, achieving efficient heating. However, currently used graphite bottom heaters, due to factors such as the structural design of various components, may result in uneven temperature distribution of the heated object during the heating process, further affecting the heating effect and the quality of subsequent products. Therefore, the design of commonly used graphite bottom heaters needs to be improved to enhance heating uniformity. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model provides a bottom heater based on the optimized heating characteristics of graphite.

[0004] The present invention can solve at least one of the above-mentioned technical problems by adopting the following technical solution:

[0005] The graphite resistor and two terminals are integrated into one structure;

[0006] The graphite resistor adopts a double-row resistor strip structure;

[0007] Two resistor bars are arranged side by side, and each end of the two resistor bars is connected to two terminals respectively;

[0008] The resistor bar adopts a strip structure with at least two S-shaped bends;

[0009] The S-shaped bend includes a strip section and a bend section;

[0010] Two strip sections are connected to the two ends of a curved section;

[0011] The resistor bar has at least three S-shaped bends of different lengths, which are classified according to length as short S-shaped bend, medium S-shaped bend, and long S-shaped bend;

[0012] The two resistor bars are set in opposite directions;

[0013] One of the resistor bars has short S-shaped bends, medium S-shaped bends, and long S-shaped bends arranged from left to right;

[0014] The other resistor bar is arranged from left to right with long S-shaped bends, medium S-shaped bends, and short S-shaped bends;

[0015] The short S-shaped bends and long S-shaped bends in one resistor strip are arranged close together with the long S-shaped bends and short S-shaped bends in another resistor strip, respectively, with gaps between them.

[0016] The two S-shaped bends in the two resistor bars are arranged far apart with a gap, and there is a window between the two S-shaped bends.

[0017] In the above design, the distance between the two S-shaped bends in the two resistor bars is 255-265mm, and the distance between the short S-shaped bend and the long S-shaped bend in each resistor bar is 170-180mm. A window with a width of 255-265mm and a length of 170-180mm is formed at the center of the graphite heater. Its beneficial effect is to reduce the failure caused by the heated object heating up too quickly in a localized area or by uneven heating.

[0018] Furthermore, the arrangement of S-shaped bends of varying lengths side by side has the beneficial effect of reducing the induced magnetic field at various points on the resistance strip, thus ensuring that the objects in the heater are heated evenly.

[0019] Furthermore, the width of the S-shaped curved line is 25-30mm, and the gap width between the lines is 15-20mm. Its beneficial effect is that it keeps the hot resistance of the heater in the range of 24-28mΩ, which can ensure rapid heating of the heater and reduce malfunctions caused by excessive local heating of the heated object.

[0020] Furthermore, the bottom heater has a density ≥1.78 cm³. 3 Flexural strength ≥ 40 MPa.

[0021] In the above design, the heater has a higher density and higher flexural strength. Its beneficial effects are, firstly, to improve the thermal conductivity of the heater; and secondly, to make the heater more durable and extend its service life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0023] Figure 1 This is a front view of the present invention.

[0024] Numbering Explanation:

[0025] 1. Terminal; 2. Short S-shaped bend; 3. Medium S-shaped bend; 4. Long S-shaped bend; 5. Open window; 6. Fixing round hole. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in an embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0030] Figure 1 This is a front view of the graphite heater.

[0031] Reference Figure 1 A bottom heater based on the optimized heating characteristics of graphite includes two terminals 1 arranged at both ends, each terminal 1 having a circular hole 6 for fixing the heater in a circuit to heat an object, and a graphite resistor disposed between the two terminals 1.

[0032] The graphite resistor and the two terminals 1 are integrated into one structure;

[0033] The graphite resistor adopts a double-row resistor strip structure;

[0034] Two resistor bars are arranged side by side, and each end of the two resistor bars is connected to two terminals respectively;

[0035] The resistor bar adopts a strip structure with at least two S-shaped bends;

[0036] The S-shaped bend includes a strip section and a bend section;

[0037] Two strip sections are connected to the two ends of a curved section;

[0038] The resistor bar has at least three S-shaped bends of different lengths, which are divided into short S-shaped bend 2, medium S-shaped bend 3, and long S-shaped bend 4 according to their length.

[0039] The two resistor bars are set in opposite directions;

[0040] One of the resistor bars is arranged from left to right as follows: 2. Short S-shaped bend; 3. Medium S-shaped bend; 4. Long S-shaped bend.

[0041] The other resistor bar is arranged from left to right as follows: 4 long S-shaped bends, 3 medium S-shaped bends, and 2 short S-shaped bends.

[0042] The short S-shaped bend 2 and the long S-shaped bend 4 in one resistor strip are arranged close together with the long S-shaped bend 4 and the short S-shaped bend 2 in another resistor strip, respectively, with gaps between them.

[0043] The two S-shaped bends 3 in the two resistor bars are arranged far apart with gaps, and there is a window 5 between the two S-shaped bends.

[0044] The width of the two terminals 1 is 105-115mm, and the diameter of the circular hole 6 on the terminal 1 is 30-35mm. The distance between a short S-shaped bend 2 and a long S-shaped bend 4 arranged close together is 30-40mm, and the distance between the two medium S-shaped bends 3 arranged further apart is 255-265mm. The overall length of the medium S-shaped bends is 170-180mm, forming a window with a width of 255-265mm and a length of 170-180mm. In each resistor strip, the distance between the short S-shaped bend 2 and the long S-shaped bend 4 is 170-180mm.

[0045] In this embodiment, there is a gap between the two S-shaped bends 3 in the two resistor bars. The beneficial effect is to reduce the failure caused by the heated object heating up too quickly or the heating not being uniform enough.

[0046] Furthermore, the arrangement of S-shaped bends of varying lengths side by side has the beneficial effect of reducing the induced magnetic field at various points, thus ensuring that the objects in the heater are heated evenly.

[0047] Furthermore, the width of the S-shaped curved line is 25-30mm, and the gap width between the lines is 15-20mm. Its beneficial effect is that it keeps the hot resistance of the heater in the range of 24-28mΩ, which can ensure rapid heating of the heater and reduce malfunctions caused by excessive local heating of the heated object.

[0048] Furthermore, the bottom heater has a density ≥1.78 cm³. 3 Flexural strength ≥ 40 MPa.

[0049] In the above design, the heater has a higher density and higher flexural strength. Its beneficial effects are, firstly, to improve the thermal conductivity of the heater; and secondly, to make the heater more durable and extend its service life.

[0050] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments may be described, i.e., those features that are not relevant to the currently considered best mode for carrying out the present invention, or those features that are not relevant to implementing the present invention.

[0051] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A bottom heater based on graphite heating characteristics optimization, comprising two terminal ends arranged at two ends, and a graphite resistor arranged between the two terminal ends, characterized in that: the graphite resistor and the two terminal ends adopt an integrated structure; the graphite resistor adopts a double-row resistor strip structure; the two resistor strips are arranged side by side, and the two ends of the two resistor strips are respectively connected to the two terminal ends; the resistor strip adopts a strip structure with at least two S-shaped bends; the S-shaped bend comprises a strip part and a bend part; the two strip parts are connected to the two ends of a bend part; the resistor strip has at least three S-shaped bends with different lengths of strip parts, which are divided into short S-shaped bend, middle S-shaped bend and long S-shaped bend according to the length; the two resistor strips are arranged in reverse; one of the resistor strips is arranged from left to right with short S-shaped bend, middle S-shaped bend and long S-shaped bend; the other resistor strip is arranged from left to right with long S-shaped bend, middle S-shaped bend and short S-shaped bend; the short S-shaped bend and the long S-shaped bend in one resistor strip are arranged close to each other with a gap, respectively, to the long S-shaped bend and the short S-shaped bend in the other resistor strip; the two middle S-shaped bends in the two resistor strips are arranged away from each other with a gap, and there is a window between the two middle S-shaped bends.

2. The bottom heater based on graphite heating property optimization according to claim 1, characterized in that, The distance between the two middle S-shaped bends of the two resistance strips is 255-265 mm; in each resistance strip, the overall length of the middle S-shaped bend is 170-180 mm ； The empty window with a width of 255-265 mm and a length of 170-180 mm is formed.

3. The bottom heater based on graphite heating property optimization according to claim 1, characterized in that, The width of the S-shaped bend strip is 25-30 mm, and the gap width between the strips is 15-20 mm.

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