Shaped heat-generating body assembly and method for producing the same

Abstract

The application discloses a special-shaped heating element assembly and a preparation method thereof. The special-shaped heating element assembly is in a hollow cylindrical structure with both ends being open, the hollow cylindrical structure comprises a plurality of layers of first winding layers and second winding layers which are alternated, the radial dimension of the two end portions of the hollow cylindrical structure is smaller than the radial dimension of the middle portion of the hollow cylindrical structure, the preparation material of the first winding layer is long carbon fiber unidirectional cloth, and the preparation material of the second winding layer is a carbon fiber net tire. The special-shaped heating element assembly is used for silicon carbide annealing, can make the silicon carbide annealing furnace obtain a more large-range stable and uniform heat field, increase the yield, and reduce the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material and crystal growth, in particular to a special-shaped heating body assembly and a preparation method thereof. BACKGROUND

[0002] At present, the silicon carbide annealing process generally adopts an induction heating mode, that is, high-frequency alternating current is passed through the induction coil of a heating cylinder, the crystal to be annealed in a crucible is heated through induction heating of the heating cylinder, and the thermal field in the crucible needs to reach a stable and uniform state. Limited by the traditional structure of the heating cylinder, it is difficult to ensure a uniform and stable thermal field range in the crucible, and the traditional structure of the heating cylinder can only anneal 1-3 crystals at a time, which is low in annealing efficiency.

[0003] In addition, the traditional heating cylinder adopts a graphite heating cylinder, which has the advantages of excellent electrical conductivity and thermal conductivity, but also has obvious disadvantages. The thermal conductivity of the graphite heating cylinder decreases with the increase of temperature. When the furnace is in high-temperature operation and the graphite heating cylinder has large wall thickness and volume, the temperature difference between the surface and the center of the graphite heating cylinder is large, which causes large thermal stress and cracking of the graphite heating cylinder. In addition, long-time operation of the graphite heating cylinder at high temperature increases the evaporation speed, thereby reducing the service life of the graphite heating cylinder and causing the mechanical strength to decrease. SUMMARY

[0004] Therefore, in view of the problems of the traditional graphite annealing heating cylinder, such as uneven temperature field in the heating process, high temperature in the middle position than in the two end positions, easy to produce large thermal stress and cracking, large evaporation speed, low mechanical strength and short service life, and small utilization range of the thermal field and low single annealing efficiency, an embodiment of the present application provides a special-shaped heating body assembly. The special-shaped heating body assembly can make the silicon carbide annealing furnace have a larger range of stable and uniform thermal field, increase the yield and reduce the cost.

[0005] A special-shaped heating body assembly, which has a hollow cylindrical structure with two open ends. The hollow cylindrical structure includes a plurality of layers of first winding layers and second winding layers alternately arranged. The radial dimension of the two end portions of the hollow cylindrical structure is smaller than the radial dimension of the middle portion of the hollow cylindrical structure. The first winding layers are made of long carbon fiber unidirectional cloth, and the second winding layers are made of carbon fiber net tire.

[0006] In some embodiments, the hollow cylindrical structure includes a first segment near one end, a second segment near the other end, and a middle segment between the first segment and the second segment.

[0007] In some embodiments, the intermediate section is curved, and the outer diameter of the intermediate section gradually narrows from the middle part to the first section and the second section.

[0008] In some embodiments, the hollow cylindrical structure has a density of 1.3-1.7 g / cm 3 .

[0009] In some embodiments, the angle between the long carbon fibers of the first winding layer and the radial plane is 0-60°.

[0010] In some embodiments, the special-shaped heating element assembly further comprises a deposition layer deposited on the surface of the hollow cylindrical structure by a chemical vapor deposition method.

[0011] Another object of the present application is to provide a preparation method of the special-shaped heating element assembly.

[0012] A preparation method of the special-shaped heating element assembly, comprising the following steps:

[0013] Step 1: wrapping long carbon fiber unidirectional cloth outside the mold to form a first winding layer;

[0014] Step 2: winding a carbon fiber net tire on the outer surface of the first winding layer to form a second winding layer;

[0015] Step 3: winding long carbon fiber unidirectional cloth on the outer surface of the second winding layer to form a first winding layer;

[0016] Step 4: repeating steps 2 and 3 several times to obtain a rough body blank;

[0017] Step 5: curing and drying the rough body blank to form a carbon fiber preform;

[0018] Step 6: carbon deposition on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heating element material;

[0019] Step 7: processing the carbon / carbon heating element material to obtain a hollow cylindrical structure with open ends; and

[0020] Step 8: graphitizing the hollow cylindrical structure.

[0021] In some embodiments, the preparation method of the special-shaped heating element assembly further comprises the following step 9: machining the hollow cylindrical structure after graphitization to reach a predetermined standard size; and purifying the machined cylindrical structure.

[0022] In some of the embodiments, the drying temperature is 130-200 DEG C and the drying time is 1-10 hours.

[0023] In some of the embodiments, the graphitization temperature is 1800-2400 DEG C and the time is 2-10 hours.

[0024] The special-shaped heating element assembly can make the silicon carbide annealing furnace have a larger range of stable and uniform heat field, increase the yield and reduce the cost.

[0025] The special-shaped heating element assembly sets the angle between the long carbon fibers of the first winding layer and the radial surface to be 0-60 DEG, in the induction heating magnetic field, the smaller the angle between the fiber bundle of the long carbon fiber and the horizontal surface, the longer the effective length of the fiber bundle cutting the magnetic induction line per unit length, and the higher the heating efficiency; on the contrary, the larger the angle, the lower the heating efficiency, therefore, the first winding layer can increase the effective length of the fiber bundle cutting the magnetic induction line and improve the heating efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0028] Figure 1 The side view of the special-shaped heating element assembly is described in an embodiment of the present application.

[0029] Explanation of reference numerals

[0030] 10, special-shaped heating element assembly; 101, first section; 102, second section; 103, middle section. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0033] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0036] It is to be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] In the description of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0039] The embodiment of the present application provides a special-shaped heating body assembly 10 to solve the problems of the traditional graphite annealing heating cylinder, such as the non-uniform temperature field caused by the heating process, the high temperature at the middle position than at both ends, the easy generation of large thermal stress and the cracking, the large volatilization speed, the mechanical strength reduction and the low service life, and the small available range of the heat field generated by the graphite annealing heating cylinder and the low single annealing efficiency. The following will be described with reference to the accompanying drawings.

[0040] The special-shaped heating body assembly 10 provided by the embodiment of the present application is exemplarily shown in Figure 1 The special-shaped heating body assembly 10 provided by the embodiment of the present application is exemplarily shown in Figure 1 The special-shaped heating body assembly 10 provided by the embodiment of the present application is exemplarily shown in

[0041] In order to more clearly illustrate the structure of the special-shaped heating body assembly 10, the special-shaped heating body assembly 10 will be introduced in combination with the accompanying drawings.

[0042] The special-shaped heating body assembly 10 provided by the embodiment of the present application is exemplarily shown in Figure 1 The special-shaped heating body assembly 10 provided by the embodiment of the present application is exemplarily shown in Figure 1A structure schematic diagram of a special-shaped heating element assembly 10 is provided in the embodiments of the present application. The special-shaped heating element assembly 10 is in a hollow cylindrical structure with both ends open. The hollow cylindrical structure comprises a plurality of layers of first winding layers and second winding layers alternately. The radial dimension of the two end portions of the hollow cylindrical structure is smaller than the radial dimension of the middle portion of the hollow cylindrical structure. The first winding layer is made of long carbon fiber unidirectional cloth. The second winding layer is made of carbon fiber web.

[0043] In some embodiments, the hollow cylindrical structure comprises a first segment 101 close to one end, a second segment 102 close to the other end, and a middle segment 103 between the first segment 101 and the second segment 102.

[0044] In some embodiments, referring to Figure 1 , the middle segment 103 is curved. The outer diameter of the middle segment 103 gradually narrows from the middle portion to both the first segment 101 and the second segment 102.

[0045] In some embodiments, the density of the hollow cylindrical structure is 1.3-1.7 g / cm 3 . For example, in a specific example, the density of the hollow cylindrical structure is 1.3 g / cm 3 . In another specific example, the density of the hollow cylindrical structure is 1.7 g / cm 3 . It is not difficult to understand that in other specific examples, the density of the hollow cylindrical structure can also be 1.4 g / cm 3 , 1.45 g / cm 3 , 1.5 g / cm 3 , 1.55 g / cm 3 , 1.6 g / cm 3 , 1.65 g / cm 3 or other values.

[0046] In some embodiments, the first winding layer has long carbon fibers with an angle of 0-60° with the radial plane. For example, in one specific embodiment, the first winding layer has long carbon fibers with an angle of 0° with the radial plane; in another specific embodiment, the first winding layer has long carbon fibers with an angle of 60° with the radial plane. It is not difficult to understand that in other specific embodiments, the first winding layer has long carbon fibers with an angle of 30°, 45°, 55° or other values with the radial plane. The above-mentioned special-shaped heating element assembly 10 sets the angle of the long carbon fibers of the first winding layer with the radial plane to be 0-60°. In the inductive heating magnetic field, the smaller the angle of the fiber bundle of the long carbon fiber with the horizontal plane, the longer the effective length of the fiber bundle cutting the magnetic induction line per unit length, and the higher the heating efficiency; on the contrary, the larger the angle, the lower the heating efficiency. Therefore, in the present application, the first winding layer can increase the effective length of the fiber bundle cutting the magnetic induction line and improve the heating efficiency.

[0047] In some embodiments, the special-shaped heating element assembly 10 further comprises a deposition layer. The deposition layer is deposited on the surface of the hollow cylindrical structure by a chemical vapor deposition method.

[0048] An embodiment also provides a preparation method of the special-shaped heating element assembly 10.

[0049] A preparation method of the special-shaped heating element assembly 10, comprising the following steps:

[0050] Step 1: wrapping long carbon fiber unidirectional cloth outside the mold to form a first winding layer.

[0051] Step 2: winding carbon fiber web outside the outer surface of the first winding layer to form a second winding layer.

[0052] Step 3: winding long carbon fiber unidirectional cloth outside the outer surface of the second winding layer to form a first winding layer.

[0053] Step 4: repeating steps 2 and 3 several times to obtain a rough body blank.

[0054] Step 5: curing and drying the rough body blank to form a carbon fiber preform.

[0055] Step 6: depositing carbon on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heating element material.

[0056] Step 7: processing the carbon / carbon heating element material to obtain a hollow cylindrical structure with open ends.

[0057] and

[0058] Step 8: graphitizing the hollow cylindrical structure.

[0059] In some embodiments, the preparation method of the special-shaped heat-emitting body assembly 10 further comprises the following step 9: machining the hollow cylindrical structure after the graphitization treatment to reach the preset standard size; and purifying the machined hollow cylindrical structure.

[0060] In some embodiments, the drying temperature during the curing and drying treatment is 130-200°C, and the drying time is 1-10h.

[0061] In some embodiments, the graphitization temperature during the graphitization treatment is 1800-2400°C, and the time is 2-10h.

[0062] Embodiment 1

[0063] The embodiment provides a preparation method of the special-shaped heat-emitting body assembly 10.

[0064] The preparation method of the special-shaped heat-emitting body assembly 10 comprises the following steps.

[0065] Step 1: wrapping long carbon fiber unidirectional cloth outside the mold to form a first winding layer. The angle between the long carbon fiber of the first winding layer and the radial plane is 60°.

[0066] Step 2: winding carbon fiber net tire on the outer surface of the first winding layer to form a second winding layer.

[0067] Step 3: winding long carbon fiber unidirectional cloth on the outer surface of the second winding layer to form a first winding layer. The angle between the long carbon fiber of the first winding layer and the radial plane is 60°.

[0068] Step 4: repeating steps 2 and 3 for 50 times to obtain a rough body blank.

[0069] Step 5: performing curing and drying treatment on the rough body blank to form a carbon fiber preform. The drying temperature during the curing and drying treatment is 180°C, and the drying time is 10h.

[0070] Step 6: depositing carbon on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heat-emitting body material.

[0071] Step 7: machining the carbon / carbon heat-emitting body material to obtain a hollow cylindrical structure with open ends.

[0072] and

[0073] Step 8: performing graphitization treatment on the hollow cylindrical structure. The graphitization temperature during the graphitization treatment is 2400°C, and the time is 2h.

[0074] Step 9: machining the hollow cylindrical structure after graphitization treatment to reach the preset standard size; purifying the machined cylindrical structure.

[0075] Embodiment 2

[0076] The embodiment provides a preparation method of the special-shaped heating element assembly 10.

[0077] The preparation method of the special-shaped heating element assembly 10 comprises the following steps:

[0078] Step 1: wrapping a long carbon fiber unidirectional cloth outside a mold to form a first winding layer. The long carbon fiber of the first winding layer has an angle of 60° with a radial plane.

[0079] Step 2: winding a carbon fiber net tire on the outer surface of the first winding layer to form a second winding layer.

[0080] Step 3: winding a long carbon fiber unidirectional cloth on the outer surface of the second winding layer to form a first winding layer. The long carbon fiber of the first winding layer has an angle of 60° with a radial plane.

[0081] Step 4: repeating steps 2 and 3 for 50 times to obtain a rough body blank.

[0082] Step 5: performing a curing and drying treatment on the rough body blank to form a carbon fiber preform. During the curing and drying treatment, the drying temperature is 200 DEG C, and the drying time is 1 h.

[0083] Step 6: depositing carbon on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heating element material.

[0084] Step 7: processing the carbon / carbon heating element material to obtain a hollow cylindrical structure with two open ends.

[0085] and

[0086] Step 8: performing a graphitization treatment on the hollow cylindrical structure. During the graphitization treatment, the graphitization temperature is 1800 DEG C, and the time is 2 h.

[0087] Step 9: machining the hollow cylindrical structure after graphitization treatment to reach the preset standard size; purifying the machined cylindrical structure.

[0088] Embodiment 3

[0089] The embodiment provides a preparation method of the special-shaped heating element assembly 10.

[0090] The preparation method of the special-shaped heating element assembly 10 comprises the following steps:

[0091] Step 1: wrapping long carbon fiber unidirectional cloth outside the mold to form a first winding layer. The long carbon fiber of the first winding layer has an angle of 45° with the radial plane.

[0092] Step 2: winding carbon fiber web outside the first winding layer to form a second winding layer.

[0093] Step 3: wrapping long carbon fiber unidirectional cloth outside the second winding layer to form a first winding layer. The long carbon fiber of the first winding layer has an angle of 45° with the radial plane.

[0094] Step 4, repeat steps 2 and 3 for 50 times to obtain a rough body blank.

[0095] Step 5, curing and drying the rough body blank to form a carbon fiber preform. The curing and drying treatment is performed at a drying temperature of 150°C for 5h.

[0096] Step 6, carbon deposition is performed on the carbon fiber preform by chemical vapor deposition method to obtain a carbon / carbon heating body material.

[0097] Step 7, processing the carbon / carbon heating body material to obtain a hollow cylindrical structure with open ends.

[0098] and

[0099] Step 8, graphitizing the hollow cylindrical structure. The graphitization treatment is performed at a graphitization temperature of 2000°C for 5h.

[0100] Step 9: machining the hollow cylindrical structure after graphitization to achieve a preset standard size; purifying the machined cylindrical structure.

[0101] Example 4

[0102] The embodiment provides a preparation method of the special-shaped heating body assembly 10.

[0103] A preparation method of the special-shaped heating body assembly 10, comprising the following steps:

[0104] Step 1: wrapping long carbon fiber unidirectional cloth outside the mold to form a first winding layer. The long carbon fiber of the first winding layer has an angle of 45° with the radial plane.

[0105] Step 2: winding carbon fiber web outside the first winding layer to form a second winding layer.

[0106] Step 3: wrapping long carbon fiber unidirectional cloth outside the second winding layer to form a first winding layer. The long carbon fiber of the first winding layer has an angle of 45° with the radial plane.

[0107] Step 4, repeat step 2 and step 3 for 50 times to obtain a rough body blank.

[0108] Step 5, solidification drying treatment is performed on the rough body blank to form a carbon fiber preform. During the solidification drying treatment, the drying temperature is 180°C, and the drying time is 4h.

[0109] Step 6, carbon deposition is performed on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heating body material.

[0110] Step 7, the carbon / carbon heating body material is processed to obtain a hollow cylindrical structure with open ends.

[0111] and

[0112] Step 8, graphitization treatment is performed on the hollow cylindrical structure. During the graphitization treatment, the graphitization temperature is 2000°C, and the time is 5h.

[0113] Step 9: The hollow cylindrical structure after graphitization treatment is machined to reach the preset standard size; the machined cylindrical structure is purified.

[0114] Comparative Example 1

[0115] The present comparative example provides a preparation method of the special-shaped heating body assembly 10.

[0116] A preparation method of the special-shaped heating body assembly 10, comprising the following steps:

[0117] Step 1: long carbon fiber unidirectional cloth is wrapped outside the mold to form a winding layer. The included angle between the long carbon fiber of the winding layer and the radial plane is 45°.

[0118] Step 2: continue to wind long carbon fiber unidirectional cloth on the outer surface of the winding layer.

[0119] Step 3, repeat step 2 for 100 times to obtain a rough body blank.

[0120] Step 4, solidification drying treatment is performed on the rough body blank to form a carbon fiber preform. During the solidification drying treatment, the drying temperature is 130°C, and the drying time is 4h.

[0121] Step 5, carbon deposition is performed on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heating body material.

[0122] Step 6, the carbon / carbon heating body material is processed to obtain a hollow cylindrical structure with open ends.

[0123] and

[0124] Step 7: Graphitizing the hollow cylindrical structure. The graphitizing temperature is 2000℃, and the time is 5h.

[0125] Step 9: Machining the hollow cylindrical structure after graphitizing to reach the preset standard size; purifying the machined cylindrical structure.

[0126] Comparative Example 2

[0127] The present comparative example provides a preparation method of the special-shaped heating element assembly 10.

[0128] A preparation method of the special-shaped heating element assembly 10, comprising the following steps:

[0129] Step 1: wrapping the carbon fiber webbing outside the mold to form a winding layer.

[0130] Step 2: winding the carbon fiber webbing on the outer surface of the winding layer.

[0131] Step 3: repeating step 2 for 100 times to obtain a rough body blank.

[0132] Step 4: curing and drying the rough body blank to form a carbon fiber preform. The curing and drying temperature is 130℃, and the curing and drying time is 4h.

[0133] Step 5: carbon deposition on the carbon fiber preform by chemical vapor deposition method to obtain a carbon / carbon heating element material.

[0134] Step 6: processing the carbon / carbon heating element material to obtain a hollow cylindrical structure with open ends.

[0135] and

[0136] Step 7: graphitizing the hollow cylindrical structure. The graphitizing temperature is 2000℃, and the time is 5h.

[0137] Step 9: machining the hollow cylindrical structure after graphitizing to reach the preset standard size; purifying the machined cylindrical structure.

[0138] The densities of the special-shaped heating element assemblies 10 in Example 1-4 and Comparative Examples 1-2 are shown in Table 1.

[0139] Table 1

[0140] Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Density 1.4-1.7 1.4-1.7 1.35-1.65 1.35-1.65 1.5-1.7 1.3-1.5

[0141] In the production process of the special-shaped heating element assembly 10, the drying temperature and time are generally 180 DEG C and 4 hours, respectively. If the drying temperature is low and the drying time is short, the fixed water molecules cannot be removed, and it is difficult to achieve sufficient drying, which affects the subsequent chemical deposition densification and other steps. In addition, the graphitization temperature is 2000 DEG C and 2 hours, which can effectively improve the performance of the special-shaped heating element assembly 10. In Comparative Example 1, the lack of carbon fiber mat will result in low radial heating and thermal conductivity efficiency of the special-shaped heating element assembly 10, which cannot meet the application requirements. In Comparative Example 2, the lack of long fibers results in low strength of the special-shaped heating element assembly 10, and the service life is reduced. In addition, the angle of the carbon fiber winding is not required, which will result in uneven density of the wound special-shaped heating element assembly 10, and different heating efficiency of each part, which will further result in uneven heat field of the special-shaped heating cylinder, large local heating capacity, uncontrollable changes in production, and short service life.

[0142] In summary, the special-shaped heating element assembly 10 described above can make the silicon carbide annealing furnace have a larger range of stable and uniform heat field, increase the yield, and reduce the cost when used for silicon carbide annealing.

[0143] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0144] Each technical feature of the above-described embodiments can be combined arbitrarily. In order to make the description simple, not all possible combinations of each technical feature in the above-described embodiments are described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application.

[0145] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the present application should be subject to the appended claims.

Claims

1. A profiled heat generator assembly, characterized by The special-shaped heating element assembly is a hollow cylindrical structure with both ends open, the hollow cylindrical structure includes a plurality of layers of first winding layers and second winding layers alternately, the radial dimension of the two end portions of the hollow cylindrical structure is smaller than the radial dimension of the middle portion of the hollow cylindrical structure, the hollow cylindrical structure includes a first segment near one end, a second segment near the other end, and an intermediate segment between the first segment and the second segment, the intermediate segment is curved, the outer diameter of the intermediate segment gradually narrows from the middle portion to the first segment and the second segment, the preparation material of the first winding layer is a unidirectional cloth of long carbon fibers, the angle between the long carbon fibers of the first winding layer and the radial plane is 0-60°, and the preparation material of the second winding layer is a carbon fiber net tire.

2. The shaped heat-emitting body assembly according to claim 1, characterized in that The hollow cylindrical structure has a density of 1.3-1.7 g / cm 3 .

3. The profiled heat generator assembly according to any one of claims 1-2, characterized in that, The special-shaped heating element assembly further includes a deposition layer, which is deposited on the surface of the hollow cylindrical structure by a chemical vapor deposition method.

4. A method of manufacturing the irregularly shaped heat generating body assembly according to any one of claims 1 to 3, characterized by, The method comprises the following steps: Step 1: wrapping a unidirectional cloth of long carbon fibers outside a mold to form a first winding layer; Step 2: winding a carbon fiber net tire on the outer surface of the first winding layer to form a second winding layer; Step 3: winding a unidirectional cloth of long carbon fibers on the outer surface of the second winding layer to form a first winding layer; Step 4: repeating steps 2 and 3 several times to obtain a rough body blank; Step 5: performing a curing and drying treatment on the rough body blank to form a carbon fiber preform; Step 6: performing carbon deposition on the carbon fiber preform by a chemical vapor deposition method to obtain a carbon / carbon heating element material; Step 7: processing the carbon / carbon heating element material to obtain a hollow cylindrical structure with both ends open; And Step 8: performing graphitization treatment on the hollow cylindrical structure.

5. The method of claim 4, wherein the step of forming the irregularly shaped heating element assembly is performed by a process comprising: Further comprising the following step 9: machining the hollow cylindrical structure after graphitization treatment to reach a preset standard size; and performing purification treatment on the machined cylindrical structure.

6. The method of claim 4, wherein the step of forming the irregularly shaped heating element assembly is performed by a process comprising: The curing and drying treatment is performed at a drying temperature of 130-200°C for 1-10h.

7. The method of claim 4-6, wherein the method further comprises: The graphitization treatment is performed at a graphitization temperature of 1800-2400°C for 2-10h.

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