A carbon nanotube heating unit for electric heater, a preparation device and a method thereof

Abstract

The present invention discloses a carbon nanotube heating unit for an electric heater, comprising a supporting substrate, a carbon nanotube film, a PI protective film and a circuit, wherein a lower PI protective film is arranged on the supporting substrate, a carbon nanotube film and a circuit are arranged on the lower PI protective film, an upper PI protective film is arranged on the carbon nanotube film, and the circuit is externally connected to an AC220V input voltage. In the carbon nanotube heating unit of the present invention, the carbon nanotube film adopts radiation heating, has a fast heating speed, and has an infrared therapy effect; and compared with graphene in the prior art, the cost is low and the service life is long.

Description

Technical Field

[0001] The present application relates to the field of electric heaters, and in particular to a carbon nanotube heating unit for electric heaters with far-infrared therapy function, and a preparation device and method thereof. Background Art

[0002] At present, electric heaters on the market are basically made of heating units such as aluminum alloy and mica. The heating method of electric heaters made of these heating units is air convection, which leads to a slow temperature rise in the environment, and the heating method is not infrared radiation, and there is no physical therapy effect. In addition, there are also aluminum alloys as the main heating components, coated with a layer of graphene to assist in infrared radiation, but the graphene heating relies on the heating of the aluminum alloy heating plate. Although it has an infrared effect, it is costly and has a short life. Therefore, how to provide a new type of heating unit, equipment and method for producing the heating unit has become a technical problem that needs to be solved in this field. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a carbon nanotube heating unit for an electric heater, a preparation device and a method thereof:

[0004] A carbon nanotube heating unit for an electric heater comprises a supporting substrate, a carbon nanotube film, a PI protective film and a circuit. A lower PI protective film is arranged on the supporting substrate, a carbon nanotube film and a circuit are arranged on the lower PI protective film, an upper PI protective film is arranged on the carbon nanotube film, and the circuit is externally connected to an AC220V input voltage.

[0005] Furthermore, the supporting substrate is an aluminum alloy substrate.

[0006] A device for preparing a carbon nanotube heating unit for an electric heater, used for preparing the carbon nanotube heating unit for an electric heater, comprising:

[0007] frame;

[0008] A workbench is installed on the frame, and a lifting device is provided at the lower part of the workbench;

[0009] A reel is mounted on the frame and is located at one end of the workbench, wherein the reel is flush with the initial height of the workbench;

[0010] A traction mechanism is installed on the frame and is located at an end of the workbench away from the reel, and the traction mechanism can connect and pull the end of the carbon nanotube film;

[0011] The hot pressing mechanism is installed on the frame and located above the workbench, and includes a hot pressing plate and a power device, and the hot pressing plate is connected to the power device;

[0012] Wherein, one end of the reel is connected to a motor through a belt drive, and the motor is configured as follows:

[0013] When laying the carbon nanotube film, the motor does not work; when pulling the carbon nanotube film, the motor works, and the driving direction is the winding direction of the roll.

[0014] Furthermore, an operation opening is provided on the frame.

[0015] Furthermore, the frame includes a transverse plate, and the hot pressing mechanism support is installed on the transverse plate; the transverse plate is provided with a hollow, and the size of the hollow is larger than the size of the workbench, and / or the size of the hollow is larger than the size of the hot pressing plate.

[0016] Furthermore, the hot pressing mechanism also includes a support plate and a mounting plate. There are several support plates, the support is mounted on the upper end of the horizontal plate, the mounting plate is mounted on the upper end of the support plate, and the hot pressing plate and the power device are respectively arranged below and above the mounting plate.

[0017] Furthermore, a plurality of guide mechanisms are arranged on the mounting plate, and the guide mechanisms are connected to the upper end surface of the hot pressing plate.

[0018] Furthermore, the traction mechanism includes a bracket and a mounting block rotatably mounted on the bracket, a film clamp is mounted on one end of the mounting block, and a driven rod moving in the vertical direction is mounted on the other end; the traction mechanism also includes a telescopic device mounted on the frame, the telescopic device is arranged below the driven rod and is connected to the driven rod through a film protection mechanism.

[0019] Further, the film protection mechanism includes a driving component and a driven component, the lower end of the driving component is connected to the telescopic device, the upper end of the driven component is connected to the driven rod, and the driving component is in contact with the driven component;

[0020] Wherein, in the first state, the driving component drives the driven component to move, and in the second state, the driving component moves relative to the driven component.

[0021] Furthermore, the driving assembly includes:

[0022] A vertical displacement plate, the lower end of which is connected to the telescopic device;

[0023] A limiting structure, fixedly mounted on the side wall of the vertical displacement plate, the limiting structure is provided with a plurality of mounting grooves, the mounting grooves are vertically arranged and opened on the side wall of the limiting structure;

[0024] A spring, fixedly disposed in the mounting groove;

[0025] A ball, movably disposed in the mounting groove, the ball being connected to the spring and in contact with the spherical groove of the driven component;

[0026] The driven component comprises:

[0027] A vertical plate, the upper end of which is connected to the driven rod;

[0028] There are multiple spherical grooves, which are continuously arranged along the side surfaces opposite to the vertical plate and the vertical displacement plate, and the sizes of the spherical grooves match the balls.

[0029] Furthermore, a pin is provided in the mounting groove, the axial direction of the pin extends along the thickness direction of the limiting structure, and both ends of the pin are fixed to the limiting structure; a V-shaped connecting rod is rotatably mounted on the pin, the V-shaped connecting rod includes a first arm portion and a second arm portion, and the end of the first arm portion is rotatably connected to the ball bearing; a space is formed at the oblique upper part of the second arm portion in the mounting groove, a plate-shaped spring fixing piece is engaged in the space, and one end of the spring is engaged and fixed to the spring fixing piece; a spring fixing recess is formed on the second arm portion, and the other end of the spring is engaged and fixed to the spring fixing recess.

[0030] Furthermore, a plurality of spring locking recesses are formed at intervals in the extending direction of the second arm portion, and the end of the spring can be selectively engaged and fixed to one of them.

[0031] Furthermore, the spring is roughly parallel to the extension direction of the second arm portion inside the mounting groove, and is connected to the spring fixing member and the second arm portion under a preloaded state, so that the ball applies tension to the V-shaped connecting rod in the direction of the spherical groove.

[0032] A method for preparing a carbon nanotube heating unit for an electric heater, using the above-mentioned device to prepare the above-mentioned carbon nanotube heating unit, comprises the following steps:

[0033] Step 1: Place the support substrate on the workbench;

[0034] Step 2: Apply a layer of PI coating on the supporting substrate;

[0035] Step 3: Lay the carbon nanotube film and circuit on the PI coating.

[0036] The carbon nanotube film is extended to a certain extent at one end away from the roll, so that the traction mechanism can fix the carbon nanotube film later.

[0037] Step 4: Apply another layer of PI coating on the carbon nanotube film and circuit;

[0038] Step 5: The lifting device works to make the height of the workbench greater than the traction mechanism and the reel;

[0039] Step 6: Fixing the end of the carbon nanotube film away from the roll to the traction mechanism;

[0040] Step 7: Start the motor, and the driving direction is the winding direction of the roll; at the same time, start the telescopic device to drive the traction mechanism to pull the carbon nanotube film;

[0041] Step 8: Start the hot pressing mechanism to hot press the above layers into a carbon nanotube heating unit;

[0042] Step 9: Cutting the Carbon Nanotube Heating Unit.

[0043] Furthermore, when the carbon nanotube film is pulled to a certain extent, the film protection mechanism automatically stops pulling the carbon nanotube film.

[0044] Beneficial effects of the present invention:

[0045] The carbon nanotube heating unit of the present invention uses radiation heating in the carbon nanotube film, has a fast heating speed, and has an infrared therapy effect; and compared with graphene in the prior art, it has low cost and long service life.

[0046] Through the cooperation of the reel and the traction mechanism, mechanical pulling force is used to pull the carbon nanotube film from both ends. The carbon nanotubes in the carbon nanotube film are combined with each other through intermolecular forces, and the carbon nanotubes are evenly dispersed in the film, thereby improving the performance of the carbon nanotube film.

[0047] A lifting device is provided at the bottom of the workbench to raise the height of the workbench to ensure that when the carbon nanotube film is pulled, the carbon nanotube heating unit on the workbench is located above the reel and the traction mechanism to prevent the carbon nanotube film and the upper PI protective film from detaching.

[0048] By setting up a film protection mechanism, when the carbon nanotube film is pulled from both ends, the driving component drives the driven component to move during the process of the film being pulled and stretched, thereby pulling the film; when the film is pulled to a certain extent, the driving component cannot drive the driven component to move downward together, and the film protection mechanism automatically stops driving the driven rod to move downward, thereby realizing the function of the film protection mechanism to automatically stop pulling the film. Therefore, when the carbon nanotube film reaches the tolerable range of pulling, the automatic stop pulling function of the film protection mechanism not only makes the film protection mechanism less likely to be damaged, but also automatically prevents the carbon nanotube film from being subjected to excessive pulling force.

[0049] In the first state, the ball is always tightly fitted with the spherical groove under the action of the spring, and the vertical displacement plate can drive the vertical plate to move downward together; in the second state, the squeezing force between the ball and the spherical groove is greater than the action force of the spring, the spring undergoes elastic deformation, and the ball continuously enters from one spherical groove into another adjacent spherical groove, and the vertical displacement plate cannot drive the vertical plate to move downward together, thereby realizing the automatic stop pulling function of the film protection mechanism, instead of relying solely on the sensor measurement signal to control the telescopic device to stop contracting, thereby avoiding excessive pulling force caused by the control signal feedback lag to damage the carbon nanotube film.

[0050] The film protection mechanism is provided with a V-shaped connecting rod. The value of the extrusion force between the ball and the spherical groove is determined by the ratio of the arm lengths of the first arm and the second arm, the bending angle of the V-shaped connecting rod, and the selection of different spring locking recesses for connecting the spring in addition to the preload value of the relevant spring. The setting freedom of the force value is relatively high. Therefore, the size of the film protection mechanism can be designed to be smaller under the same force value, which is conducive to miniaturization. In addition, the V-shaped connecting rod plays a role in changing the direction of the force. By setting different bending angles, the spring has more setting directions, which is more conducive to the compact design of the film protection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a structural diagram of a carbon nanotube heating unit;

[0052] Figure 2 Preparation of the overall structure of the device for the carbon nanotube heating unit Figure 1 ;

[0053] Figure 3 Preparation of the overall structure of the device for the carbon nanotube heating unit Figure 2 ;

[0054] Figure 4 It is the hot pressing mechanism diagram;

[0055] Figure 5 A diagram of the equipment for preparing a carbon nanotube heating unit (the hot pressing mechanism and part of the rack were deleted for ease of display);

[0056] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0057] Figure 7 This is the structural diagram of the film protection mechanism;

[0058] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0059] Fig. 9 This is a product status diagram after step 4 of the preparation method of the carbon nanotube heating unit;

[0060] Fig.10 Prepare the equipment status diagram for after step 4;

[0061] Fig.11 Prepare the equipment status diagram for after step 6. DETAILED DESCRIPTION

[0062] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] like Figure 1 As shown, this embodiment provides a carbon nanotube heating unit for an electric heater, including a supporting substrate 61, a carbon nanotube film 62, a PI protective film 63 and a circuit. A lower PI protective film 63 is provided on the supporting substrate 61, a carbon nanotube film 62 and a circuit are provided on the lower PI protective film 63, an upper PI protective film 63 is provided on the carbon nanotube film 62, and the circuit is externally connected to an AC220V input voltage. In the carbon nanotube heating unit of the present invention, the carbon nanotube film adopts radiation heating, has a fast heating speed, and has an infrared therapy effect; and compared with graphene in the prior art, it has low cost and long service life.

[0064] In this embodiment, the support substrate 61 is an aluminum alloy substrate.

[0065] like Figure 2-3 As shown, a device for preparing a carbon nanotube heating unit for an electric heater includes a frame 1 and a workbench 2, a reel 3, a traction mechanism 4 and a hot pressing mechanism 5 installed on the frame 1; the workbench 2 is an operating table for the carbon nanotube heating unit 6 during the preparation process, the reel 3 is wound with a carbon nanotube film 62, the traction mechanism 4 is used to pull the carbon nanotube film 62, and the hot pressing mechanism 5 is used to hot press a supporting substrate 61, a carbon nanotube film 62, a PI protective film 63 and a circuit into a carbon nanotube heating unit 6.

[0066] When preparing, refer to the attached Figure 10-11 First, place the support substrate 61 on the workbench 2; second, apply a layer of PI coating on the support substrate 61; third, lay the carbon nanotube film 62 and the circuit on the PI coating, and extend a certain margin at one end of the carbon nanotube film 62 away from the reel 3; fourth, apply another layer of PI coating on the carbon nanotube film 62 and the circuit; fifth, the traction mechanism 4 cooperates with the reel 3 to pull the carbon nanotube film 62 from both ends; sixth, use the hot pressing mechanism 5 to hot press the above layers into the carbon nanotube heating unit 6. The carbon nanotube film 62 is pulled from both ends by mechanical pulling force, and the carbon nanotubes in the carbon nanotube film 62 are combined with each other through intermolecular forces, and the carbon nanotubes are evenly dispersed in the film, thereby improving the performance of the carbon nanotube film 62. Preferably, the frame 1 is provided with an operation port 11 to facilitate the transportation of raw materials, the operation of the spraying equipment, and the connection of the carbon nanotube film 62 with the traction mechanism 4 when preparing the carbon nanotube heating unit.

[0067] In this embodiment, combined with the attached Figure 5 The reel 3 and the traction mechanism 4 are respectively located at the two ends of the workbench 2 so as to pull the carbon nanotube film 62 from both ends. The reel 3 is roughly flush with the initial height of the workbench 2, which is convenient for laying the carbon nanotube film 62. A lifting device 21 is provided at the lower part of the workbench 2 to raise the height of the workbench 2 to ensure that when the carbon nanotube film 62 is pulled, the carbon nanotube heating unit 6 on the workbench 2 is located above the reel 3 and the traction mechanism 4 to prevent the carbon nanotube film 62 and the upper PI protective film 63 from being separated.

[0068] In this embodiment, combined with the attached Figure 3-4 In order to improve the strength and stability of the preparation equipment, the frame 1 includes a horizontal plate 12, and the hot pressing mechanism 5 is supported and installed on the horizontal plate 12; a hollow 13 is opened on the horizontal plate 12, and the size of the hollow 13 is larger than the size of the downward pressing structure of the workbench 2 and / or the hot pressing mechanism 5, so that the horizontal plate 12 does not hinder the downward pressing action of the hot pressing mechanism 5.

[0069] In this embodiment, combined with the attached Figure 4 The hot pressing mechanism 5 includes a support plate 51, a mounting plate 52, a hot pressing plate 53 and a power device 54. The support plate 51 is provided with several supports and mounted on the upper end of the horizontal plate 12. The mounting plate 52 is mounted on the upper end of the support plate 51. The hot pressing plate 53 and the power device 54 are respectively arranged below and above the mounting plate 52, and the hot pressing plate 53 is connected to the power device 54. In this embodiment, the power device 54 is a hydraulic cylinder. As another embodiment, the power device 54 can also be a cylinder. Preferably, a plurality of guide mechanisms 55 are provided on the mounting plate 52, and the guide mechanism 55 is connected to the upper end surface of the hot pressing plate 53 to facilitate improving the stability of the movement of the hot pressing plate 53.

[0070] In this embodiment, combined with the attached Figure 5 One end of the reel 3 is connected to a motor 32 through a belt 31, and the motor 32 is configured so that when laying the carbon nanotube film 62, the motor 32 does not work, and the robot stretches the film and lays it on the PI coating; when pulling the carbon nanotube film 62 from both ends, the motor 32 works, and the driving direction is the winding direction of the reel 3, so as to cooperate with the traction mechanism 4 to pull the carbon nanotube film 62.

[0071] In this embodiment, combined with the attached Figure 5-6The traction mechanism 4 includes a bracket 41 and a mounting block 42 rotatably mounted on the bracket 41, a film clamp 43 is mounted on one end of the mounting block 42, and a driven rod 44 moving in the vertical direction is mounted on the other end; the traction mechanism 4 also includes a telescopic device 45 mounted on the frame 1, the telescopic device 45 is arranged below the driven rod 44, and is connected to the driven rod 44 through a film protection mechanism 7. When the carbon nanotube film 62 is pulled from both ends, the motor 32 drives the direction reel 3 to reel, the film clamp 43 fixes the end of the film 62 away from the reel 3, and the telescopic device 45 contracts to drive the mounting block 42 to rotate, so that the traction mechanism 4 cooperates with the reel 3 to pull the carbon nanotube film 62 from both ends. In this embodiment, the telescopic device 45 is an electric push rod. As other embodiments, the telescopic device 45 can also be a hydraulic rod or a pneumatic rod.

[0072] In this embodiment, combined with the attached Figure 7 The film protection mechanism 7 includes a driving component 71 and a driven component 72, wherein the lower end of the driving component 71 is connected to the telescopic device 45, and the upper end of the driven component 72 is connected to the driven rod 44, and the driving component 71 is in contact with the driven component 72;

[0073] In the first state, the driving assembly 71 drives the driven assembly 72 to move, and in the second state, the driving assembly 71 moves relative to the driven assembly 72. With this arrangement, when the carbon nanotube film 62 is pulled from both ends, the telescopic device 45 drives the driving assembly 71 to move downward. In the first state, that is, when the film 62 is pulled and stretched, the driving assembly 71 drives the driven assembly 72 to move, and the driven assembly 72 drives the driven rod 44 to move downward, so that the mounting block 42 rotates and pulls the film 62. In the second state, when the film 62 is pulled to a certain extent, the driving component 71 cannot drive the driven component 72 to move downward, and the film protection mechanism 7 automatically stops driving the driven rod 44 to move downward. That is to say, although the driving component 71 continues to move downward, the downward displacement of the driven component 72 no longer continues, thereby realizing the function of automatically stopping pulling the film 62 of the film protection mechanism 7. Therefore, when the carbon nanotube film 62 reaches the tolerable range of pulling, the automatic stop pulling function of the film protection mechanism 7 not only makes the film protection mechanism 7 less likely to be damaged, but also automatically prevents the carbon nanotube film 62 from being subjected to excessive pulling force.

[0074] In this embodiment, combined with the attached Figure 7-8The driving assembly 71 includes a vertical displacement plate 711, a limiting structure 712, a ball 713 and a spring 714. The lower end of the vertical displacement plate 711 is connected to the telescopic device 45, and the spring 714 is fixedly installed on the vertical displacement plate 711; specifically, the spring 714 is fixedly installed inside the limiting structure 712, and the fixing method of the spring 714 is that the spring 714 is placed in the installation groove 715 of the limiting structure 712;

[0075] The ball 713 is in contact with the spring 714 and the driven component 72, and the ball 713 is a component for connecting the driving component 71 and the driven component 72; specifically, the ball 713 is movably arranged in the mounting groove 715, the ball 713 is connected to the spring 714, and is in contact with the spherical groove 721 of the driven component 72;

[0076] The limiting structure 712 is fixedly mounted on the side wall of the vertical displacement plate 711. The limiting structure 712 can fix the ball bearing 713 in the vertical direction. There are multiple mounting grooves 715, which are vertically arranged and opened on the side wall of the limiting structure 712. The ball bearing 713 cannot move in the vertical direction relative to the limiting structure 712.

[0077] The driven component 72 includes a vertical plate 722 and a spherical groove 721. The upper end of the vertical plate 722 is connected to the driven rod 44. The spherical groove 721 is provided on the side of the vertical plate 722 opposite to the vertical displacement plate 711. There are multiple spherical grooves 721, which are continuously arranged along the side of the vertical plate 722, and the size of the spherical groove 721 matches the ball 713.

[0078] Through the above arrangement, in the first state, the ball 713 is in a state of extending out of the mounting groove 715 under the action of the spring 714, and the ball 713 is always tightly fitted with the spherical groove 721, and the vertical displacement plate 711 can drive the vertical plate 722 to move downward together; in the second state, the ball 713 and the spherical groove 721 squeeze each other, and the squeezing force of the two is greater than the action force of the spring 714, and the spring 714 undergoes elastic deformation, and the ball 713 continuously enters from one spherical groove 721 into another adjacent spherical groove 721, and the vertical displacement plate 711 cannot drive the vertical plate 722 to move downward together, thereby realizing the automatic stop pulling function of the film protection mechanism 7, instead of relying solely on the sensor measurement signal to control the telescopic device 45 to stop contracting, thereby avoiding excessive pulling force caused by the lag in the control signal feedback to damage the carbon nanotube film 62.

[0079] In this embodiment, combined with the attached Figure 7-8A pin 716 is arranged in the installation groove 715, and the axial direction of the pin 716 extends along the thickness direction of the limiting structure 712, and both ends of the pin 716 are fixed to the limiting structure 712. A V-shaped connecting rod 717 is rotatably sleeved on the pin 716, and the V-shaped connecting rod 717 includes a first arm portion 7171 and a second arm portion 7172. The end of the first arm portion 7171 is rotatably connected to the ball 713, and the ball 713 can fit in and out of the spherical groove 721 by rotating the V-shaped connecting rod 717 centered on the pin 716; the end of the second arm portion 7172 is connected to the spring 714.

[0080] A space 7151 is formed at the obliquely upper portion of the second arm portion 7172 in the installation groove 715, a plate-shaped spring fixing member 7141 is engaged in the space 7151, and one end of the spring 714 is engaged and fixed to the spring fixing member 7141; a spring locking recess 7142 is formed on the second arm portion 7172, and the other end of the spring 714 is engaged and fixed to the spring locking recess 7142. Preferably, a plurality of spring locking recesses 7142 are formed at intervals in the extending direction of the second arm portion 7172, and the other end of the spring 714 can be selectively engaged and fixed to one of them.

[0081] The spring 714 is roughly parallel to the extension direction of the second arm 7172 inside the mounting groove 715, and is connected to the spring fixing member 7141 and the second arm 7172 under a preloaded state, thereby applying a pulling force to the V-shaped connecting rod 717 in the direction of making the ball 713 fit into the spherical groove 721.

[0082] Through the above arrangement, in the first state, since the spring 714 is applied with a preload, the spring 714 pulls the second arm 7172 upward, and the ball 713 is pressed into the spherical groove 721. When the carbon nanotube film 62 can still be pulled and extended, the reaction force of the film 62 on the driven component 72 is reflected as the force of the spherical groove 721 squeezing the ball 713. At this time, since the force of the spherical groove 721 squeezing the ball 713 is less than the elastic force of the spring 714 applying force to the V-shaped connecting rod 717, the elastic force of the spring 714 can be used to keep the ball 713 in contact with the spherical groove 721, and the driving component 71 drives the driven component 72 to move together. In the second state, the force of the spherical groove 721 squeezing the ball 713 increases accordingly, gradually overcoming the preload of the spring 714, that is, overcoming the elastic force of the spring 714. When the film 62 is pulled to a certain extent, the force of the spherical groove 721 squeezing the ball 713 is greater than the elastic force of the spring 714 exerting force on the V-shaped connecting rod 717, and the V-shaped connecting rod 717 is wound around Figure 8The first arm 7171 rotates clockwise when viewed from the center, and the ball 713 comes out of the spherical groove 721, and the driving assembly 71 cannot drive the driven assembly 72 to move together. Preferably, the upper end surface 7152 of the mounting groove 715 extends upwardly at an angle, so that the ball 713 can be separated from the spherical groove 721 when the first arm 7171 swings.

[0083] Since the film protection mechanism 7 is provided with a V-shaped connecting rod 717, the value of the above-mentioned reaction force is determined by the ratio of the arm lengths of the first arm 7171 and the second arm 7172, the bending angle of the V-shaped connecting rod 717, and the selection of the spring 714 to connect different spring locking notches 7142 in addition to the preload of the spring 714. The setting freedom of the reaction force value is relatively high. Therefore, under the same force value, the size of the film protection mechanism 7 can be designed to be smaller, which is conducive to miniaturization. The V-shaped connecting rod 717 plays a role in changing the direction of the force. By setting different bending angles, the spring 714 has more setting directions, which is more conducive to the compact design of the film protection mechanism 7.

[0084] Combined with Figure 9-11 , a method for preparing a carbon nanotube heating unit for an electric heater, comprising the following steps:

[0085] Step 1: placing the supporting substrate 61 on the workbench 2;

[0086] Step 2: coating a layer of PI coating on the supporting substrate 61;

[0087] Step 3: Lay the carbon nanotube film 62 and the circuit on the PI coating.

[0088] The carbon nanotube film 62 is extended to a certain extent at one end away from the reel 3 so that the traction mechanism 4 can subsequently fix the carbon nanotube film 62;

[0089] Step 4: Apply another layer of PI coating on the carbon nanotube film 62 and the circuit;

[0090] Step 5: The lifting device 21 works to make the height of the workbench 2 greater than the traction mechanism 4 and the reel 3;

[0091] Step 6: fix the end of the carbon nanotube film 62 away from the reel 3 to the traction mechanism 4;

[0092] Step 7: Start the motor 32 to work, and the driving direction is the winding direction of the reel 3; at the same time, start the telescopic device 45 to drive the traction mechanism 4 to pull the carbon nanotube film 62;

[0093] Step 8: Start the hot pressing mechanism 5 to hot press the above layers into a carbon nanotube heating unit 6;

[0094] Step 9: Cutting the carbon nanotube heating unit 6 .

[0095] In this embodiment, when the carbon nanotube film 62 is pulled to a certain extent, the film protection mechanism 7 automatically stops pulling the carbon nanotube film 62 .

[0096] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A preparation device for a carbon nanotube heating unit for an electric heater, the carbon nanotube heating unit for an electric heater comprising a supporting substrate, a carbon nanotube film, a PI protective film and a circuit, a lower PI protective film is arranged on the supporting substrate, a carbon nanotube film and a circuit are arranged on the lower PI protective film, an upper PI protective film is arranged on the carbon nanotube film, and the circuit is externally connected to an AC220V input voltage; The preparation equipment comprises: frame; A workbench is installed on the frame, and a lifting device is provided at the lower part of the workbench; A reel is mounted on the frame and is located at one end of the workbench, wherein the reel is flush with the initial height of the workbench; A traction mechanism is installed on the frame and is located at one end of the workbench away from the reel, and the traction mechanism can connect and pull the end of the carbon nanotube film; The hot pressing mechanism is installed on the frame and located above the workbench, and includes a hot pressing plate and a power device, and the hot pressing plate is connected to the power device; It is characterized in that one end of the reel is connected to a motor through a belt drive, and the motor is configured as follows: When laying the carbon nanotube film, the motor does not work; when pulling the carbon nanotube film, the motor works, and the driving direction is the winding direction of the roll.

2. The device according to claim 1, characterized in that: The frame comprises a transverse plate, and the hot pressing mechanism is supported and installed on the transverse plate; the transverse plate is provided with a hollow, and the size of the hollow is larger than the size of the workbench, and / or the size of the hollow is larger than the size of the hot pressing plate.

3. The device according to claim 2, characterized in that: The hot pressing mechanism also includes a support plate and a mounting plate. There are several support plates, the support is mounted on the upper end of the horizontal plate, the mounting plate is mounted on the upper end of the support plate, and the hot pressing plate and the power device are respectively arranged below and above the mounting plate.

4. The device according to claim 1, characterized in that: The traction mechanism includes a bracket and a mounting block rotatably mounted on the bracket, a film clamp is mounted on one end of the mounting block, and a driven rod moving in the vertical direction is mounted on the other end; the traction mechanism also includes a telescopic device mounted on the frame, the telescopic device is arranged below the driven rod and is connected to the driven rod through a film protection mechanism.

5. The device according to claim 4, characterized in that The film protection mechanism comprises a driving component and a driven component, wherein the lower end of the driving component is connected to the telescopic device, the upper end of the driven component is connected to the driven rod, and the driving component is in contact with the driven component; Wherein, in the first state, the driving component drives the driven component to move, and in the second state, the driving component moves relative to the driven component.

6. The device according to claim 5, characterized in that The drive assembly comprises: A vertical displacement plate, the lower end of which is connected to the telescopic device; A limiting structure, fixedly mounted on the side wall of the vertical displacement plate, the limiting structure is provided with a plurality of mounting grooves, the mounting grooves are vertically arranged and opened on the side wall of the limiting structure; A spring, fixedly disposed in the mounting groove; A ball, movably disposed in the mounting groove, the ball being connected to the spring and in contact with the spherical groove of the driven component; The driven component comprises: A vertical plate, the upper end of which is connected to the driven rod; There are multiple spherical grooves, which are continuously arranged along the side surfaces opposite to the vertical plate and the vertical displacement plate, and the sizes of the spherical grooves match the balls.

7. The device according to claim 6, characterized in that A pin is arranged in the installation groove, the axial direction of the pin extends along the thickness direction of the limiting structure, and both ends of the pin are fixed to the limiting structure; a V-shaped connecting rod is rotatably sleeved on the pin, the V-shaped connecting rod includes a first arm portion and a second arm portion, and the end of the first arm portion is rotatably connected to the ball; a space is formed at the oblique upper part of the second arm portion in the installation groove, a plate-shaped spring fixing piece is engaged in the space, and one end of the spring is engaged and fixed to the spring fixing piece; a spring fixing recess is formed on the second arm portion, and the other end of the spring is engaged and fixed to the spring fixing recess.

8. The device according to claim 7, characterized in that The spring is substantially parallel to the extension direction of the second arm portion inside the mounting groove, and is connected to the spring fixing member and the second arm portion under a preloaded state, so that the ball applies tension to the V-shaped connecting rod in the direction in which the ball fits into the spherical groove.

9. A method for preparing a carbon nanotube heating unit for an electric heater, using the device according to any one of claims 1 to 8 to prepare the carbon nanotube heating unit, characterized in that: The steps include: Step 1: Place the support substrate on the workbench; Step 2: Apply a layer of PI coating on the supporting substrate; Step 3: Lay the carbon nanotube film and circuit on the PI coating. The carbon nanotube film is extended to a certain extent at one end away from the roll, so that the traction mechanism can fix the carbon nanotube film later. Step 4: Apply another layer of PI coating on the carbon nanotube film and circuit; Step 5: The lifting device works to make the height of the workbench greater than the traction mechanism and the reel; Step 6: Fixing the end of the carbon nanotube film away from the roll to the traction mechanism; Step 7: Start the motor, and the driving direction is the winding direction of the roll; at the same time, start the telescopic device to drive the traction mechanism to pull the carbon nanotube film; Step 8: Start the hot pressing mechanism to hot press the above layers into a carbon nanotube heating unit; Step 9: Cutting the Carbon Nanotube Heating Unit.

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