Temperature control device of photovoltaic production line multi-layer multi-cavity precision laminating machine

Abstract

The utility model discloses a kind of photovoltaic production line multilayer multicavity precision laminating machine temperature control device, it is related to laminating machine technical field, including shell, the side of shell is provided with door panel, the inside of shell is provided with two pairs of heating module, temperature control piece is set on each heating module, temperature control piece includes first slider, the both sides of each heating module are fixed with first slider, heat pipe, the inside of each heating module is embedded with heat pipe, the inside of shell is provided with two pairs of pressing plate by transmission part, a pair of pressing plate is arranged between each pair of heating module.The utility model is set temperature control piece, the temperature of pressing plate can be controlled, photovoltaic module can use the pressing plate with higher temperature above to offset the advantage of early heat absorption that it is first contacted with lower pressing plate, and by setting first slider, heating module is conveniently taken out from fixed plate, by setting transmission part, photovoltaic module placed between a pair of pressing plate can be pressurized.

Description

Technical Field

[0001] This utility model relates to the field of laminator technology, and in particular to a temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line. Background Technology

[0002] In the photovoltaic industry, the photovoltaic module laminator is the core equipment in the packaging link of the industrial chain. It is used to encapsulate the glass, EVA film, battery string and backsheet in the photovoltaic module into a finished photovoltaic module with no bubbles, strong adhesion and waterproof and moisture-proof properties under vacuum environment, constant temperature and pressure conditions. However, the laminator usually heats only one side when heating. Single-sided heating will cause uneven temperature distribution, resulting in a large temperature difference between the upper and lower surfaces of the photovoltaic module and serious uneven cross-linking and curing of EVA. Utility Model Content

[0003] The purpose of this invention is to provide a temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line, comprising a housing, a door panel on one side of the housing, and two pairs of heating modules on the inner side of the housing. Each heating module is equipped with a temperature control element, the temperature control element comprising: The first slider is fixedly provided on both sides of each heating module; Heat pipes are embedded inside each of the heating modules; The inner side of the housing is provided with two pairs of pressure plates via a transmission component, with a pair of pressure plates between each pair of heating modules.

[0005] Preferably, each pressure plate is fixedly provided with a pair of fixing plates on the side near the heating module, and each fixing plate is provided with a first sliding groove on the side near the heating module, and each first slider slides in the corresponding first sliding groove.

[0006] Preferably, the temperature control component further includes a sensor, and each heating module has a temperature measuring hole on the side away from the door panel, and each temperature measuring hole is equipped with a sensor.

[0007] Preferably, the transmission component includes: The second slider is fixedly provided on both sides of each pressure plate; Two sets of double-ended threaded rods, each set consisting of four double-ended threaded rods, with the ends of adjacent sets of double-ended threaded rods fixedly connected by a connecting rod.

[0008] Preferably, a pair of second sliding grooves are provided on both sides of the housing, and each second slider slides in the corresponding second sliding groove. The double-ended threaded rod passes through the second slider and is rotatably connected to the housing.

[0009] Preferably, the threads at both ends of each double-ended threaded rod are in opposite directions, and the pitch of each double-ended threaded rod is equal.

[0010] Preferably, the transmission component further includes a synchronous pulley. At least one synchronous pulley is fixedly provided at the end of the upper double-threaded rod near the housing. The same synchronous belt is sleeved on the outer side of two adjacent synchronous pulleys to drive the upper double-threaded rod to rotate, which can drive all double-threaded rods to rotate synchronously.

[0011] Preferably, the transmission component further includes a motor, the motor is installed inside the housing, and the output shaft of the motor is fixedly connected to the end of a double-threaded rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, by setting a temperature control component, the temperature of the pressure plate can be controlled, so that the photovoltaic module can use the higher temperature pressure plate above it to offset the advantage of early heat absorption when it comes into contact with the pressure plate below. By compensating for the timing difference through the initial temperature difference, the upper and lower surfaces of the photovoltaic module eventually reach the target curing temperature synchronously. Furthermore, by setting a first slider, the heating module can be easily removed from the fixed plate, which makes it easier for staff to inspect or replace the heating module and improves the utilization rate of the equipment. 2. In this utility model, by setting a transmission component, the photovoltaic module placed between a pair of pressure plates can be pressurized. By setting multiple sets of double-headed threaded rods, multiple photovoltaic modules can be pressurized simultaneously, thereby improving production efficiency and equipment utilization. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the pressure plate structure of this utility model; Figure 3 This is a schematic diagram of the slide groove structure of this utility model; Figure 4 This is a schematic diagram of the transmission component structure of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the temperature control component of this utility model; The components in the diagram are numbered as follows: 1. Housing; 2. Heating module; 3. Pressure plate; 4. Temperature control component; 41. First slider; 43. Heat pipe; 44. Sensor; 5. Transmission component; 51. Second slider; 52. Double-ended threaded rod; 53. Synchronous pulley; 54. Synchronous belt; 55. Motor; 56. Second slide rail; 6. Fixing plate; 7. Door panel. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Example: This example provides a temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line. See [link to example]. Figure 1-6 The device includes a housing 1, with a door panel 7 on one side. There are two door panels 7. The inner side of the housing 1 is provided with two pairs of heating modules 2. Each heating module 2 is provided with a temperature control element 4. The temperature control element 4 includes a first slider 41. The first slider 41 is fixed on both sides of each heating module 2. A heat conduction pipe 43 is embedded inside each heating module 2. The heat conduction pipe 43 can be made of SUS316L, which has a temperature resistance of ≥300℃. By spraying a ceramic anti-coking coating on the surface of the heat conduction pipe 43, the service life of the heat conduction pipe 43 can be extended. The inner side of the housing 1 is provided with two pairs of pressure plates 3 through a transmission element 5. A pair of pressure plates 3 is provided between each pair of heating modules 2. Each pressure plate 3 is in contact with the contact surface of the adjacent heating module 2. In use, the photovoltaic module (not shown in the figure) that needs to be pressurized is transported to the top surface of the lower pressure plate 3 in each pair of pressure plates 3, so that the photovoltaic module is located between the pair of pressure plates 3.

[0016] Each pressure plate 3 has a pair of fixing plates 6 fixed on the side near the heating module 2. Each fixing plate 6 has a first sliding groove on the side near the heating module 2. Each first slider 41 slides in the corresponding first sliding groove. The heating module 2 has a handle on the side near the door panel 7 to facilitate pulling the heating module 2 out of the fixing plate 6. The temperature control component 4 also includes a sensor 44. Each heating module 2 has a temperature measuring hole on the side away from the door panel 7. Each temperature measuring hole is equipped with a sensor 44. A control box is set on one side of the housing 1. The control box is equipped with a controller. Each sensor 44 is connected to the controller through a wire. Since the sensor 44 is embedded in the heating module 2, the sensor 44 can monitor the temperature on the heating module 2 in real time. When the sensor 44 detects that the temperature on the heating module 2 has reached the specified temperature, the sensor 44 transmits the information to the controller through the wire. The controller then controls the heat pipe 43 to heat, maintain the temperature, or turn off.

[0017] Sensor 44 can be a PT1000 platinum resistance thermometer for real-time monitoring of the temperature of heating module 2. Since heating module 2 and pressure plate 3 are tightly fitted together, and sensor 44 is embedded in the temperature measuring hole of heating module 2 and directly fitted with the body of heating module 2 without gaps, sensor 44 can monitor the temperature of heating module 2 in real time, thereby reflecting the temperature of pressure plate 3. The lower surface of photovoltaic module first contacts the pressure plate 3 corresponding to the lower heating module 2. At this time, sensor 44 on the lower heating module 2 provides real-time feedback of temperature data to prevent it from heating up too quickly. Since the upper heating module 2 has a higher preset temperature, its sensor 44 also monitors the temperature status in real time to ensure that when pressure plate 3 contacts photovoltaic module later, heating module 2 can quickly replenish the temperature to offset the temperature imbalance caused by the contact timing difference.

[0018] Data from sensors 44 on the upper and lower heating modules 2 is synchronized to the controller. Sensors 44 convert temperature signals into electrical signals, which are transmitted to the controller inside the housing 1 via wires. The controller compares the measured temperature with the preset target temperature and dynamically adjusts the power of the heat pipe 43. If the measured temperature is lower than the target value, the controller instructs the heat pipe 43 in the heating module 2 to continue heating. If the target value is reached, the controller instructs the heat pipe 43 to maintain a constant temperature. If the temperature exceeds the target value, the controller instructs the heat pipe 43 to stop heating, thus forming a closed-loop control. This allows the temperature difference between the upper and lower surfaces of the photovoltaic module to converge to ±0.3℃ within 3 minutes, eventually stabilizing at the EVA curing core temperature of 145-155℃, ensuring synchronous cross-linking of the encapsulant film and guaranteeing the quality of module encapsulation.

[0019] This utility model discloses a temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line. By setting a temperature control component 4, it achieves the function of controlling the temperature of the pressure plate 3. This allows the photovoltaic module to utilize the higher temperature pressure plate 3 above it to offset the advantage of its earlier heat absorption when it comes into contact with the pressure plate 3 below it. By compensating for the timing difference through the initial temperature difference, the upper and lower surfaces of the photovoltaic module eventually reach the target curing temperature synchronously. Furthermore, by setting a first slider 41, the heating module 2 can be easily removed from the fixed plate 6, making it convenient for staff to inspect or replace the heating module 2, thus improving the utilization rate of the equipment.

[0020] In the specific implementation process, such as Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the transmission component 5 includes a second slider 51, with a second slider 51 fixedly provided on both sides of each pressure plate 3, two sets of double-ended threaded rods 52, each set of double-ended threaded rods 52 including four double-ended threaded rods 52, the ends of two adjacent sets of double-ended threaded rods 52 being fixedly connected by a connecting rod, a pair of second sliding grooves 56 being provided on both sides of the housing 1, each second slider 51 sliding in the corresponding second sliding groove 56, the double-ended threaded rods 52 passing through the second sliders 51 and being rotatably connected to the housing 1, the thread directions at both ends of each double-ended threaded rod 52 being opposite, and the pitch of each double-ended threaded rod 52 being equal, the transmission component 5 also includes a synchronous pulley 53, at least one synchronous pulley 53 being fixedly provided at the end of the upper double-ended threaded rod 52 near the housing 1, the same synchronous belt 54 being sleeved on the outer side of two adjacent synchronous pulleys 53, since the thread direction and pitch of each double-ended threaded rod 52 are equal, driving one double-ended threaded rod 52 located at the top to rotate can drive all double-ended threaded rods 52 to rotate synchronously.

[0021] The transmission component 5 also includes a motor 55, which can be a 37GB-520 model. This model can be directly driven by an Arduino+L298N and is suitable for intermittent high-frequency start-stop. The motor 55 is installed inside the housing 1. The output shaft of the motor 55 is fixedly connected to the end of a double-threaded rod 52 to provide rotational power to the double-threaded rod 52. A dual-channel relay module and a cyclic timing switch (not shown in the figure) are installed inside the housing 1. The positive and negative terminals of the motor 55 are connected to the forward and reverse output terminals of the relay module, respectively. The power supply terminal of the relay is connected to the controller (not shown in the figure). The cyclic timing switch is used to set three stages: forward rotation time, stop time, and reverse rotation time, which are executed cyclically. The cyclic timing switch controls the on / off of the forward and reverse channels of the relay to realize the cycle of forward rotation, stop, reverse rotation, and stop of the motor 55.

[0022] The temperature control device for the multi-layer, multi-cavity precision laminator in the photovoltaic production line of this utility model, by setting a transmission component 5, realizes the function of pressurizing the photovoltaic modules placed between a pair of pressure plates 3. By setting multiple sets of double-headed threaded rods 52, multiple photovoltaic modules can be pressurized at the same time, which improves production efficiency and equipment utilization.

[0023] Specifically, the working principle and operation method of this utility model are as follows: The heating module 2 is placed into the first groove on the corresponding fixing plate 6 via the first slider 41 on both sides. The sensor 44 is embedded in the heating hole on the corresponding heating module 2. Each sensor 44 is connected to the controller inside the housing 1 via a wire. The heating module 2 is powered on, and the controller inside the housing 1 controls the heat pipe 43 to start heating, so that the heat is transferred to the heating module 2 wrapped on the outside of the heat pipe 43. Since the adjacent surfaces of the pressure plate 3 and the heating module 2 are in contact, the heat on the heating module 2 can be transferred to the pressure plate 3. In each pair of heating modules 2, the temperature of the lower heating module 2 is lower than that of the upper heating module 2. Since the sensor 44 is embedded in the heating module 2, the sensor 44 can monitor the temperature on the heating module 2 in real time. When the sensor 44 detects that the temperature on the heating module 2 has reached the specified temperature, the sensor 44 transmits the information to the controller via the wire. The controller controls the heat pipe 43 to stop heating and maintain a constant temperature. At this time, the pressure plate 3 is preheated.

[0024] The photovoltaic module is conveyed to the top surface of the lower pressure plate 3 in each pair of pressure plates 3, so that the photovoltaic module is located between the pair of pressure plates 3. Since the temperature of the upper heating module 2 in each pair of heating modules 2 is 10° higher than that of the lower heating module 2, the lower surface of the photovoltaic module absorbs heat in advance but the temperature rises slowly. The photovoltaic module first contacts the pressure plate 3 located below it to ensure that it is in contact with the lower pressure plate 3. The pressure plate 3 located below the photovoltaic module transfers a certain amount of heat to the photovoltaic module in advance through heat conduction in contact with the lower surface of the photovoltaic module. Since the upper pressure plate 3 is not in contact with the photovoltaic module, the upper surface of the photovoltaic module absorbs heat only through air heat conduction and heat radiation.

[0025] The motor 55 is started and rotates forward, driving a double-ended threaded rod 52 located at the top to rotate clockwise. Since the double-ended threaded rods 52 at the top are all fixedly connected to the corresponding double-ended threaded rods 52 at the bottom, and the pitch of the multiple double-ended threaded rods 52 is equal, the multiple double-ended threaded rods 52 can rotate synchronously with the cooperation of the synchronous pulley 53 and the synchronous belt 54. Since the threads at both ends of the double-ended threaded rods 52 have opposite directions, the second sliders 51 at both ends of each double-ended threaded rod 52 can move relative to each other, so that a pair of pressure plates 3 between adjacent heating modules 2 can move relative to each other synchronously with the second sliders 51. Since a bare rod section is provided in the middle of the double-ended threaded rod 52, and the height of the bare rod section is equal to the final forming height of the photovoltaic module, each pair of pressure plates 3 can heat and press the two sides of the photovoltaic module. When the upper and lower pressure plates 3 contact the photovoltaic module, the motor 55 stops.

[0026] The time difference between the upper and lower pressure plates 3 contacting the photovoltaic module is controlled within 20 seconds to shorten the time difference for heat penetration. Within three minutes after the upper pressure plate 3 contacts the photovoltaic module, the temperature difference is monitored in real time by the sensor 44. The controller controls the heating, constant temperature, or extinguishing state of the heat pipe 43 to keep the temperature difference between the upper and lower surfaces of the photovoltaic module within ±0.3℃. When the curing temperature reaches the standard, the final temperature of the upper and lower surfaces of the photovoltaic module is stabilized at 145-155℃ and maintained for ≥20 minutes. After completion, the motor 55 reverses, driving a double-headed threaded rod 52 to rotate counterclockwise, allowing each pair of pressure plates 3 to move in opposite directions and remove the photovoltaic module.

[0027] When heating module 2 needs to be repaired or replaced, the equipment is powered off. After the temperature control component 4 cools down, the power supply and sensor 44 of heating module 2 are removed. Pull the handle on heating module 2 so that heating module 2 is pulled out from the fixed plate 6 through the first slider 41. The staff can then repair it. After that, the repaired heating module 2 or the new heating module 2 is inserted into the fixed plate 6. Finally, the power supply and sensor 44 are installed on heating module 2.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" or "multiple groups" means two or more, unless otherwise explicitly specified.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line, comprising a housing (1), wherein a door panel (7) is provided on one side of the housing (1), characterized in that, The inner side of the housing (1) is provided with two pairs of heating modules (2), and each heating module (2) is provided with a temperature control element (4), the temperature control element (4) including: First slider (41), each of the heating modules (2) is fixedly provided with a first slider (41) on both sides. Heat pipe (43), each of the heating modules (2) has a heat pipe (43) embedded inside; The inner side of the housing (1) is provided with two pairs of pressure plates (3) through the transmission component (5), and a pair of pressure plates (3) is provided between each pair of heating modules (2).

2. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 1, characterized in that: Each of the pressure plates (3) is fixed with a pair of fixing plates (6) on the side near the heating module (2). Each of the fixing plates (6) is provided with a first sliding groove on the side near the heating module (2). Each of the first sliders (41) slides in the corresponding first sliding groove.

3. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 2, characterized in that: The temperature control component (4) also includes a sensor (44). Each heating module (2) has a temperature measuring hole on the side away from the door panel (7), and a sensor (44) is installed in each temperature measuring hole.

4. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 1, characterized in that: The transmission component (5) includes: The second slider (51) is fixedly provided on both sides of each of the pressure plates (3). Two sets of double-ended threaded rods (52), each set of double-ended threaded rods (52) includes four double-ended threaded rods (52), and the ends of two adjacent sets of double-ended threaded rods (52) are fixedly connected by a connecting rod.

5. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 4, characterized in that: The housing (1) has a pair of second sliding grooves (56) on both sides of its side walls. Each second slider (51) slides in the corresponding second sliding groove (56). The double-headed threaded rod (52) passes through the second slider (51) and is rotatably connected to the housing (1).

6. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 5, characterized in that: The threads at both ends of each of the double-ended threaded rods (52) are opposite in direction, and the pitch of each of the double-ended threaded rods (52) is equal.

7. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 6, characterized in that: The transmission component (5) also includes a synchronous pulley (53). At least one synchronous pulley (53) is fixed at the end of the upper double-threaded rod (52) near the housing (1). The same synchronous belt (54) is sleeved on the outer side of two adjacent synchronous pulleys (53), which drives one of the upper double-threaded rods (52) to rotate, and can drive all double-threaded rods (52) to rotate synchronously.

8. The temperature control device for a multi-layer, multi-cavity precision laminator in a photovoltaic production line according to claim 7, characterized in that: The transmission component (5) also includes a motor (55), which is installed inside the housing (1). The output shaft of the motor (55) is fixedly connected to the end of a double-threaded rod (52).

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