Graphite boat electromagnetic induction drying device

Abstract

The utility model relates to the technical field of electromagnetic heating, in particular to a graphite boat electromagnetic induction drying device. A graphite boat electromagnetic induction drying device comprises a drying container which is provided with an upper cover plate and a containing space; the lower heating assembly is arranged in the containing space, a graphite boat to be dried is suitable for being placed on the lower heating assembly, the lower heating assembly comprises an electromagnetic heating coil, and the electromagnetic heating coil is used for generating a high-frequency electromagnetic field to enable the graphite boat to be dried to generate heat energy. The graphite boat drying device solves the problems that an electric heating coil, an electric heating piece and the like can only heat in a certain area, so that a graphite boat outside the area needs to be dried through heat in air flow, and the drying efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating, and particularly relates to an electromagnetic induction drying device for a graphite boat. Background Art

[0002] Graphite boat drying, as a key process in the manufacturing process of photovoltaic cells, mainly involves the drying treatment of the important tool of the graphite boat during the battery manufacturing process. Through the drying technology, the moisture and other residues on the surface and inside of the graphite boat can be effectively removed, thereby improving the quality and performance of the photovoltaic cells. The basic principle of graphite boat drying is to evaporate the moisture and other volatile substances in the graphite boat through heat transfer, so as to remove impurities and improve the quality of the graphite boat.

[0003] In the existing graphite boat drying, heating is often carried out by means of electric heating sheets, electric heating coils, etc. In the above methods, the electric heating coils, electric heating sheets, etc. can only generate heat in a certain area, resulting in the graphite boat outside the area needing to be dried by the heat in the air flow, and there is a situation of low drying efficiency. Summary of the Utility Model

[0004] In view of this, the utility model provides an electromagnetic induction drying device for a graphite boat to solve the problem that the electric heating coils, electric heating sheets, etc. can only generate heat in a certain area, resulting in the graphite boat outside the area needing to be dried by the heat in the air flow, and there is a problem of low drying efficiency.

[0005] In a first aspect, the utility model provides an electromagnetic induction drying device for a graphite boat, including:

[0006] A drying container, which has an upper cover plate and a containing space;

[0007] A lower heating component, which is arranged in the containing space, and the graphite boat to be dried is suitable to be placed on the lower heating component. The lower heating component includes an electromagnetic heating coil, and the electromagnetic heating coil is used to generate a high-frequency electromagnetic field to make the graphite boat to be dried generate heat energy.

[0008] The electromagnetic coil heating method is that a high-speed changing high-frequency high-voltage current flowing through the coil will generate a high-speed changing alternating magnetic field. When a graphite boat is placed on it, the surface of the graphite boat will cut the alternating magnetic force lines and generate an alternating current (i.e., eddy current) at the bottom of the graphite boat. The eddy current makes the carriers at the bottom of the graphite boat move at high speed and irregularly, and the carriers collide and rub against each other to generate heat energy, thus achieving the effect of heating the object. Compared with the situation where only a certain area can be heated by electric heating coils, electric heating sheets, etc., the electromagnetic field range generated by the electromagnetic heating coil is larger, making the entire graphite boat within the range of the electromagnetic field, and having the advantages of high heating efficiency and uniform drying.

[0009] In an alternative embodiment, the lower heating assembly includes a first support plate and a second support plate, and the electromagnetic heating coil is disposed between the first support plate and the second support plate. The specific structure of the lower heating assembly is arranged such that the electromagnetic heating coil is placed between two support plates, and the first support plate and the second support plate serve to protect the electromagnetic heating coil.

[0010] In an alternative embodiment, the electromagnetic heating coil is formed by nesting a series of electromagnetic heating wire loops. Starting from the innermost electromagnetic heating wire loop, it extends outwards in circles. Adjacent electromagnetic heating wire loops are connected end to end and are arranged in close contact with each other.

[0011] In an alternative embodiment, the spaced graphite plates can evaporate the moisture in the graphite boat from the gaps. In addition, the length direction of the graphite plates is the same as the length direction of the vertical section, and the magnetic lines generated by the vertical section are perpendicular to the graphite plates, thereby achieving the highest heating efficiency.

[0012] In an alternative embodiment, the drying container is provided with an upper cover plate and a bottom plate. The bottom plate is connected to the second support plate through support ribs. Both ends of the lower heating assembly are respectively provided with support ends, and the support ends are adapted to support the graphite boat to be dried. The upper cover plate is arranged corresponding to the bottom plate.

[0013] In an alternative embodiment, a temperature sensor is further included. The temperature sensor is disposed on the inner side wall of the accommodation space. A heat dissipation pipeline is communicated with the bottom plate, and an exhaust fan is provided at the end of the heat dissipation pipeline away from the bottom plate.

[0014] In an alternative embodiment, the number of the lower heating assemblies is two, and the first support plates of each lower heating assembly are respectively adapted to place the graphite boats to be dried.

[0015] In an alternative embodiment, an outer frame, an exhaust fan and a blower are further included. The drying container is placed on the outer frame, and the drying container is fixedly connected to the outer frame. The exhaust fan and the blower are respectively communicated with the drying container through pipelines.

[0016] In an alternative embodiment, an upper heating assembly is further included. The upper heating assembly is disposed above the graphite boat to be dried, and the upper heating assembly and the lower heating assembly are adapted to accommodate the graphite boat to be dried. Description of the Drawings

[0017] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Top view of an electromagnetic induction drying device for a graphite boat according to an embodiment of the present utility model;

[0019] Figure 2 Front view of an electromagnetic induction drying device for a graphite boat according to an embodiment of the present utility model;

[0020] Figure 3 Half-sectional view of a graphite boat placed in a drying container according to an embodiment of the present utility model;

[0021] Figure 4 Schematic diagram inside a drying container according to an embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of a graphite boat and a support end according to an embodiment of the present utility model;

[0023] Figure 6 Cross-sectional view of a lower heating component according to an embodiment of the present utility model;

[0024] Figure 7 Schematic diagram of two electromagnetic heating coils in series of a lower heating component according to an embodiment of the present utility model;

[0025] Figure 8 Schematic diagram of an electromagnetic heating coil of a lower heating component according to an embodiment of the present utility model.

[0026] Explanation of reference numerals: 1, drying container; 101, upper cover plate; 102, side plate; 103, bottom plate; 104, accommodation space; 105, support end; 1051, protrusion; 106, support rib plate; 107, non-contact infrared thermometer; 2, hair dryer; 3, air filter; 4, exhaust fan; 5, outer frame; 6, graphite boat to be dried; 601, graphite plate; 7, heat dissipation pipeline; 701, exhaust fan; 8, lower heating component; 801, first support plate; 802, second support plate; 803, electromagnetic heating coil; 8031, horizontal section; 8032, vertical section. Detailed embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 8 , to describe the embodiments of the present utility model.

[0029] According to an embodiment of the present utility model, on the one hand, a graphite boat electromagnetic induction drying device is provided, including: a drying container 1, and the drying container 1 has an accommodation space 104;

[0030] A lower heating component 8, the lower heating component 8 is arranged in the accommodation space 104, and a graphite boat 6 to be dried is suitable to be placed on the lower heating component 8. The lower heating component 8 includes an electromagnetic heating coil 803, and the electromagnetic heating coil 803 generates a high-frequency electromagnetic field to make the graphite boat 6 to be dried generate heat energy.

[0031] In this embodiment, the electromagnetic coil heating method is that a high-speed changing high-frequency high-voltage current flowing through the coil will generate a high-speed changing alternating magnetic field. When a graphite boat is placed on it, the surface of the graphite boat will cut the alternating magnetic force lines and generate an alternating current (i.e., eddy current) at the bottom part of the graphite boat. The eddy current makes the carriers at the bottom of the graphite boat move at high speed and randomly. The carriers collide and rub against each other to generate heat energy, thereby achieving the effect of heating the object. Compared with the situation where only a certain area can be heated by an electric heating coil, an electric heating sheet, etc., the electromagnetic field range generated by the electromagnetic heating coil 803 is larger, so that the entire graphite boat is within the electromagnetic field range, and it has the advantages of high heating efficiency and uniform drying.

[0032] As Figure 6 shown, in one embodiment, the lower heating component 8 includes a first support plate 801 and a second support plate 802, and an electromagnetic heating coil 803 is arranged between the first support plate 801 and the second support plate 802.

[0033] In this embodiment, the specific structure of the lower heating component 8 is set so that the electromagnetic heating coil 803 is placed between two support plates, and the first support plate 801 and the second support plate 802 play a role in protecting the electromagnetic heating coil 803. It should be noted that the first support plate 801 and the second support plate 802 are respectively fixedly connected to the electromagnetic heating coil 803, and the fixing method can be various methods such as gluing and clamping, which are not limited herein.

[0034] As Figure 6 , Figure 7 ,Figure 8 As shown, in one embodiment, the electromagnetic heating coil 803 is formed by nesting loops of electromagnetic heating wire. It extends outward from the innermost loop of electromagnetic heating wire in circles, and adjacent loops of electromagnetic heating wire are connected end to end and are arranged in contact with each other.

[0035] In this embodiment, the electromagnetic heating wire loops are connected end to end so that the entire electromagnetic heating coil 803 is composed of one wire, avoiding the generation of a disordered heating magnetic field by different wires. In addition, the electromagnetic heating coil 803 is formed by nesting loops of electromagnetic heating wire, extending outward in circles from the innermost loop of electromagnetic heating wire, and adjacent loops of electromagnetic heating wire are arranged in contact with each other to accommodate the maximum number of loops in the smallest possible plane. In addition, the middle of the electromagnetic heating coil 803 is continuously connected in series. Disconnecting the connection poses a risk of heating up, and if connected in parallel, the loss will increase and the heating effect of a single coil will be poor because the magnetic field will become lower and the heating effect on the graphite will be poor.

[0036] As Figure 6 、 Figure 7 、 Figure 8 As shown, in one embodiment, the electromagnetic heating wire loop is rectangular, the electromagnetic heating wire loop is provided with a horizontal section 8031 and a vertical section 8032, and the graphite boat 6 to be dried is provided with at least two spaced graphite plates 601. The length direction of the graphite plate 601 is the same as the length direction of the vertical section 8032.

[0037] In this embodiment, the electromagnetic coil heating method is that a high-speed changing high-frequency high-voltage current flowing through the coil will generate a high-speed changing alternating magnetic field. When a graphite boat is placed on it, the surface of the graphite boat will cut the alternating magnetic force lines and generate an alternating current (i.e., eddy current) at the bottom of the graphite boat. The eddy current makes the carriers at the bottom of the graphite boat move at high speed and randomly, and the carriers collide and rub against each other to generate heat energy, thus achieving the effect of heating the object. The spaced graphite plates 601 can evaporate the moisture in the graphite boat from the gaps. In addition, the length direction of the graphite plate 601 is the same as the length direction of the vertical section 8032, and the magnetic lines generated by the vertical section 8032 are perpendicular to the graphite plate 601, thereby achieving the highest heating efficiency. It should be noted that the length of the vertical section 8032 is greater than the length of the horizontal section 8031.

[0038] As Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, in one embodiment, the drying container 1 is provided with an upper cover plate 101 and a bottom plate 103. The bottom plate 103 is connected to the second support plate 802 through support ribs 106. Both ends of the lower heating assembly 8 are respectively provided with support ends 105, and the support ends 105 are adapted to support the graphite boat 6 to be dried. The upper cover plate 101 and the bottom plate 103 are arranged correspondingly.

[0039] In this embodiment, the upper cover plate 101 and the bottom plate 103 are correspondingly arranged to enclose the accommodation space 104, so as to accelerate the drying speed of the graphite boat 6 to be dried. In addition, support ends 105 are respectively provided at both ends of the lower heating assembly 8, and the support ends 105 are adapted to support the graphite boat 6 to be dried, so as to prevent the lower heating assembly 8 from bearing the gravity of the graphite boat 6 to be dried. The bottom plate 103 is connected to the second support plate 802 through a support rib plate 106, and the support rib plate 106 serves to support the second support plate 802.

[0040] As Figure 5 shown, in one embodiment, each support end 105 is provided with a protrusion 1051, and the protrusion 1051 is adapted to the bottom of the graphite boat 6 to be dried and restricts any movement of the graphite boat 6 to be dried. As Figure 4 shown, the drying container 1 further includes a side plate 102. The side plate 102, the bottom plate 103 and the upper cover plate 101 form the accommodation space 104. A plurality of heat dissipation holes are provided on the side plate 102 to enable the accommodation space 104 to exchange flow with the external air. It should be noted that a sufficient distance is left between the side surface of the lower heating assembly 8 and the side plate 102. On the one hand, it facilitates the flow of gas in the accommodation space 104, and on the other hand, it prevents the heat energy generated by the graphite boat 6 to be dried from affecting the side plate 102 and the bottom plate 103.

[0041] As Figure 3 shown, in one embodiment, a temperature sensor is further included. The temperature sensor is arranged on the inner side wall of the accommodation space 104. A heat dissipation pipe 7 is communicated with the bottom plate 103, and an exhaust fan 701 is provided at the end of the heat dissipation pipe 7 away from the bottom plate 103. It should be noted that a first temperature sensor is provided on the upper surface of the first support plate 801, a second temperature sensor facing the graphite boat 6 to be dried is provided on the inner side wall of the accommodation space 104, and a third temperature sensor facing the graphite boat 6 to be dried is provided on the upper cover plate 101. In addition, as Figure 1 shown, a non-contact infrared thermometer 107 is further provided on the side wall of the drying container 1, and the non-contact infrared thermometer 107 is located at both ends of the graphite plate 601 to sense the temperature change inside the graphite boat 6 to be dried.

[0042] In this embodiment, the temperature sensor is used to sense the temperature in the accommodation space 104. The heat dissipation pipe 7 further enhances the heat dissipation capacity in the accommodation space 104. The exhaust fan 701 is used to extract the internal air to the outside, and the exhaust fan 701 dissipates heat from the electromagnetic heating coil 803 to prevent the coil from overheating.

[0043] As Figure 3 、 Figure 4As shown, in one embodiment, the number of the lower heating assemblies 8 is two. On the first support plates 801 of each lower heating assembly 8, graphite boats to be dried are respectively adapted to be placed. By providing two lower heating assemblies 8, the drying efficiency of the entire drying container 1 is improved, that is, the drying container 1 can dry two graphite boats 6 to be dried simultaneously. It should be noted that the electromagnetic heating coils 803 of adjacent lower heating assemblies 8 are connected in series, and the electromagnetic heating coils 803 of all lower heating assemblies 8 are wound by one wire.

[0044] As Figure 1 、 Figure 2 As shown, in one embodiment, it further includes an outer frame 5, an exhaust fan 4 and a blower 2. The drying container 1 is placed on the outer frame 5, and the drying container 1 is fixedly connected to the outer frame 5. The exhaust fan 4 and the blower 2 are respectively communicated with the drying container 1 through pipelines.

[0045] In this embodiment, the outer frame 5 is used to fix and support the drying container 1. During heating, the exhaust fan 4 and the blower 2 work together, that is, the exhaust fan 4 extracts the air in the accommodation space 104, and the blower 2 blows in the external air to realize the circulation of gas in the drying container 1. As Figure 1 As shown, an air filter 3 is further provided between the blower 2 and the drying container 1. The gas blown in by the blower 2 is filtered by the air filter 3 to ensure the purity of the gas in the drying container 1.

[0046] In one embodiment, it further includes an upper heating assembly. The upper heating assembly is arranged above the graphite boat 6 to be dried, and the upper heating assembly and the lower heating assembly 8 are adapted to accommodate the graphite boat 6 to be dried. Through the cooperation of the upper heating assembly and the lower heating assembly 8, the heating efficiency is further improved. It should be noted that the specific structures of the upper heating assembly and the lower heating assembly 8 are exactly the same.

[0047] To achieve automatic control, it further includes a power supply, a display screen and a controller. Among them, the power supply is connected to the electromagnetic heating coil 803, and the controller is respectively connected to the exhaust fan 4, the blower 2, the exhaust fan 701, the temperature sensor, the power supply, the display screen and other circuits. The display screen displays the specific temperature.

[0048] According to the embodiment of the present invention, on the other hand, a method for using a graphite boat electromagnetic induction drying device is further provided, including the following steps:

[0049] 1) Place the graphite boat 6 to be dried on the support end 105 through the auxiliary robotic arm, and cover the upper cover plate 101 to enclose the accommodation space 104;

[0050] 2) The power supply is turned on, enabling the electromagnetic heating coil 803 to generate a high-frequency alternating magnetic field, causing the graphite boat 6 to be dried to generate heat energy by itself. The first temperature sensor, the second temperature sensor, and the third temperature sensor transmit temperature information to the controller in real time, and the temperature value is displayed on the display screen until the temperature in the accommodation space 104 reaches about 200 °C, maintaining heating for about ten minutes, and then stopping the heating; at the same time, a non-contact infrared thermometer 107 is also provided to monitor the heating temperature of different regions of the graphite boat 6 to be dried in real time and to monitor whether each region is heated evenly;

[0051] 3) After stopping the heating, turn on the exhaust fan 701, the hair dryer 2, and the exhaust blower 4. The air from the hair dryer 2 enters the drying container 1 through the air filter 3, forming a mode where the hair dryer 2 blows air inward, and the exhaust fan 701 and the exhaust blower 4 exhaust air outward, accelerating the gas flow rate in the drying container 1 and quickly reducing the overall temperature of the graphite boat.

[0052] The electromagnetic induction drying device for graphite boats provided by the present utility model has the following advantages: (1) By arranging an electromagnetic heating coil 803 formed by a single wire, the generation of a chaotic electromagnetic field is avoided; (2) The length direction of the graphite plate 601 of the graphite boat is arranged to be consistent with the length direction of the vertical section 8032 to achieve the maximum heating efficiency; (3).

[0053] As an alternative embodiment, the number of the lower heating assemblies 8 provided in the drying container 1 can also be 1, 3, 4 or even more.

[0054] As an alternative embodiment, the upper heating assembly can also be not provided.

[0055] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electromagnetic induction drying device for a graphite boat, characterized in that, Comprising: A drying container (1) having an accommodation space (104); A lower heating assembly (8) disposed within the accommodation space (104), on which a graphite boat (6) to be dried is adapted to be placed. The lower heating assembly (8) includes an electromagnetic heating coil (803) that generates a high-frequency electromagnetic field to cause the graphite boat (6) to be dried to generate heat energy.

2. The electromagnetic induction drying device for graphite boats according to claim 1, wherein The lower heating assembly (8) includes a first support plate (801) and a second support plate (802), with the electromagnetic heating coil (803) disposed between the first support plate (801) and the second support plate (802).

3. The electromagnetic induction drying device for graphite boats according to claim 1, characterized in that, The electromagnetic heating coil (803) is formed by nesting a series of electromagnetic heating wire loops, extending outwards in circles from the innermost electromagnetic heating wire loop. Adjacent electromagnetic heating wire loops are connected end to end and are arranged in contact with each other.

4. The electromagnetic induction drying device for graphite boats according to claim 3, characterized in that, The electromagnetic heating wire loop is rectangular, having a transverse section (8031) and a vertical section (8032). The graphite boat (6) to be dried is provided with at least two spaced-apart graphite plates (601), and the length direction of the graphite plates (601) is the same as the length direction of the vertical section (8032).

5. The electromagnetic induction drying device for graphite boats according to claim 2, characterized in that, The drying container (1) is provided with an upper cover plate (101) and a bottom plate (103). The bottom plate (103) is connected to the second support plate (802) through a support rib plate (106). Both ends of the lower heating assembly (8) are respectively provided with support ends (105) that are adapted to support the graphite boat (6) to be dried, and the upper cover plate (101) is disposed corresponding to the bottom plate (103).

6. The electromagnetic induction drying device for graphite boats according to claim 5, characterized in that, It further includes a temperature sensor disposed on the inner sidewall of the accommodation space (104). A heat dissipation pipe (7) is communicated with the bottom plate (103), and an exhaust fan (701) is provided at the end of the heat dissipation pipe (7) facing away from the bottom plate (103).

7. The electromagnetic induction drying device for graphite boats according to claim 2, wherein The number of the lower heating assemblies (8) is two, and a graphite boat to be dried is respectively adapted to be placed on the first support plate (801) of each lower heating assembly (8).

8. The electromagnetic induction drying device for graphite boats according to claim 1, characterized in that, It further includes an outer frame (5), an exhaust fan (4), and a blower (2). The drying container (1) is placed on the outer frame (5) and fixedly connected thereto. The exhaust fan (4) and the blower (2) are respectively communicated with the drying container (1) through pipelines.

9. The electromagnetic induction drying device for graphite boats according to claim 1, characterized in that, It further includes an upper heating assembly disposed above the graphite boat (6) to be dried, and the upper heating assembly and the lower heating assembly (8) are adapted to accommodate the graphite boat (6) to be dried therebetween.

Images