Electromagnetic heating plate for photovoltaic module laminating machine and laminating machine
By using electromagnetic heating plates in photovoltaic module lamination machines and using alternating magnetic field heating, the high energy consumption problem of traditional heating methods is solved, low energy consumption and high efficiency heating is achieved, and the cost of lamination of photovoltaic modules is reduced.
Patent Information
- Application Number
- CN202421171071.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The energy consumption problems of traditional photovoltaic module laminators, especially the high energy consumption of electric heating methods and the pollution of the environment by oil heating.
Using an electromagnetic heating plate, an annular electromagnetic coil arranged in an array is arranged on the lower surface of the heating plate body, and the alternating current is used to generate an alternating magnetic field to achieve heating. The adjacent electromagnetic coils are in opposite directions to enhance the magnetic field strengthening effect, and real-time monitoring is carried out in conjunction with a temperature sensor.
On the premise of ensuring the heating effect, significantly reduces power consumption, improves electromagnetic utilization rate and heating efficiency, and reduces heat loss.
Smart Images
Figure CN223182353U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic module production, and specifically to an electromagnetic heating plate for a photovoltaic module laminator. Background Art
[0002] With the increasing photovoltaic installed capacity, as a key device in the production process of photovoltaic modules, the specifications of photovoltaic module laminators are constantly increasing, and the subsequent energy consumption problem has also become a key concern in the industry. Traditional photovoltaic module laminators generally use oil heating or electric heating methods. Among them, oil heating requires regular replacement of heat transfer oil, which causes great damage to the environment. Electric heating methods such as electric heating tube heating and electric heating sheet heating consume a large amount of electric energy, increasing the lamination cost of photovoltaic modules. Summary of the Utility Model
[0003] In order to solve the above technical problems existing in the existing bearing platform, this application provides a bearing platform, which adopts the following technical solutions:
[0004] An electromagnetic heating plate for a photovoltaic module laminator includes a heating plate body and at least one heating module provided on the lower surface of the heating plate body;
[0005] The heating module includes a plurality of annular electromagnetic coils arranged in an array. The plurality of annular electromagnetic coils are formed by continuously winding a metal wire, and both ends of the metal wire are respectively used to connect the two poles of a power supply;
[0006] The winding directions of two adjacent annular electromagnetic coils are opposite. After the plurality of annular electromagnetic coils are energized, the magnetic flux directions of two adjacent annular electromagnetic coils are opposite.
[0007] For the electromagnetic heating plate for a photovoltaic module laminator provided by this application, a heating module composed of a plurality of annular electromagnetic coils arranged in an array is provided on the lower surface of the heating plate body. After an alternating current is introduced into the annular heating module, the annular electromagnetic coils generate an alternating magnetic field, thereby realizing electromagnetic heating of the heating plate body. Compared with traditional electric heating, electromagnetic heating significantly reduces power consumption on the premise of ensuring the heating effect.
[0008] In addition, since the magnetic flux directions of adjacent annular electromagnetic coils are opposite, a magnetic field strengthening effect can be generated, thereby improving the electromagnetic utilization rate and realizing rapid heating.
[0009] In some embodiments, the annular electromagnetic coil is circular, elliptical or rectangular.
[0010] The circular and elliptical annular electromagnetic coils are more convenient and faster to wind and form. For the rectangular annular electromagnetic coil, the gap between adjacent annular electromagnetic coils can be reduced, improving the space utilization rate.
[0011] In some embodiments, a plurality of annular electromagnetic coils are arranged in a rectangular array; the winding process of two adjacent columns of annular electromagnetic coils is as follows: a metal wire winds from a first starting point to a first ending point along a first serpentine path to form a plurality of continuous and staggeredly arranged first half-coils; the metal wire then continues to wind from the first ending point back to the first starting point along a second serpentine path to form a plurality of continuous and staggeredly arranged second half-coils, and the plurality of second half-coils are complementary to the plurality of first half-coils one by one to form the first column of annular electromagnetic coils; the metal wire that returns to the first starting point continues to a second starting point and then winds from the second starting point to a second ending point along a third serpentine path to form a plurality of continuous and staggeredly arranged third half-coils; the metal wire then continues to wind from the second ending point back to the second starting point along a fourth serpentine path to form a plurality of continuous and staggeredly arranged fourth half-coils, and the plurality of fourth half-coils are complementary to the plurality of third half-coils one by one to form the second column of annular electromagnetic coils adjacent to the first column of annular electromagnetic coils, wherein the third serpentine path has the same direction as the second serpentine path, and the fourth serpentine path has the same direction as the first serpentine path.
[0012] A simple and quick winding method is provided, which completes the winding and forming of a plurality of annular electromagnetic coils arranged in a rectangular array. Each annular electromagnetic coil includes a single turn of metal wire, and the winding directions of two adjacent annular electromagnetic coils are opposite to ensure that after being energized, the magnetic flux directions of two adjacent annular electromagnetic coils are opposite.
[0013] In some embodiments, the heating module further includes a carrier plate, on which a plurality of annular wire grooves are arranged in an array, and the metal wire is connected and wound in the plurality of wire grooves to form a plurality of annular electromagnetic coils; the carrier plate is mounted on the lower surface of the hot plate body.
[0014] Winding the metal wire in the wire grooves on the carrier plate realizes the prefabrication and forming of the heating module. Subsequently, directly mounting the entire heating module on the lower surface of the hot plate body can complete the rapid assembly of the electromagnetic heating plate of the present application. In addition, when the annular electromagnetic coil in the heating module is damaged, the entire heating module can be replaced.
[0015] In some embodiments, the carrier plate is an insulating plate or a metal plate, and the hot plate is a metal plate.
[0016] Using an insulating plate as the carrier plate, after the heating module is mounted on the hot plate body, the insulating plate can play a heat insulation role. While using a metal plate as the carrier plate is beneficial to the heat dissipation of the annular electromagnetic coil, and the electromagnetic wire around the ring can also be fully utilized to heat the metal plate, and the heat is conducted to the hot plate body through the metal plate, further improving the heating efficiency of the annular electromagnetic coil.
[0017] In some embodiments, at least one winding area is provided on the heating plate body, and a plurality of annular wire grooves arranged in an array are provided in the winding area. A metal wire is continuously wound in the plurality of wire grooves to form a heating module composed of a plurality of annular electromagnetic coils.
[0018] The annular electromagnetic coil is directly wound into the wire groove on the lower surface of the heating plate body, so that the annular electromagnetic coil can directly heat the heating plate body, further improving the heating efficiency.
[0019] In some embodiments, the electromagnetic heating plate further includes a temperature sensor installed in the heating plate body.
[0020] By providing a temperature sensor in the heating plate body, real-time monitoring of the temperature of the heating plate body is achieved, and finally it is ensured that the annular electromagnetic coil heats the heating plate body to a predetermined temperature value.
[0021] In some embodiments, the electromagnetic heating plate includes a plurality of heating modules laid on the hot plate body, and the plurality of heating modules are connected in series in sequence.
[0022] For a large-area heating plate body, a plurality of heating modules are regularly distributed in different areas of the heating plate body according to a predetermined pattern, so as to form different heating areas on the heating plate body to meet the heating requirements for different pressure-bearing processes.
[0023] In some embodiments, the plurality of annular electromagnetic coils are formed by parallel winding of at least two metal wires overlapping in the thickness direction of the heating plate body.
[0024] In this way, by winding only once, an annular electromagnetic coil composed of at least two turns of metal wires can be formed. Compared with an annular electromagnetic coil composed of a single turn of metal wire, the annular electromagnetic coil composed of at least two turns of metal wires has a larger magnetic flux, further improving the heating performance of the annular electromagnetic coil.
[0025] In some embodiments, for the adjacent i-th annular electromagnetic coil and (i + 1)-th annular electromagnetic coil formed by sequentially winding the metal wire, the i-th annular electromagnetic coil is formed by the metal wire winding at least one turn along the first clockwise direction, and the (i + 1)-th annular electromagnetic coil is formed by the metal wire winding at least one turn along the second clockwise direction, where the second clockwise direction is opposite to the first clockwise direction.
[0026] Another simple and fast winding method is provided, which sequentially completes the winding and forming of a plurality of annular electromagnetic coils. Each annular electromagnetic coil includes at least one turn of metal wire, and the winding directions of adjacent two annular electromagnetic coils are opposite to each other. In this way, it can also be ensured that after being powered on, the magnetic flux directions of adjacent two annular electromagnetic coils are opposite to each other.
[0027] The embodiment of the present application further provides a laminator, which includes the electromagnetic heating plate described in any one of the above, as well as a conveyor belt, an upper pressing device and a vacuum pumping device. The conveyor belt is sleeved outside the electromagnetic heating plate and is used to convey the photovoltaic module above the electromagnetic heating plate. The electromagnetic heating plate is used to heat the photovoltaic module located above the electromagnetic heating plate. The upper pressing device is used to seal the photovoltaic module located above the electromagnetic heating plate onto the electromagnetic heating plate to form a lamination cavity between the electromagnetic heating plate and the upper pressing device. The vacuum pumping device is used to pump vacuum for the lamination cavity. The upper pressing device is further used to press the photovoltaic module after the photovoltaic module is heated.
[0028] The laminator provided by the present application performs lamination treatment on the photovoltaic module by means of electromagnetic heating, which reduces the power consumption during the lamination process. Description of the Drawings
[0029] Figure 1 It is a schematic bottom view structure diagram of the electromagnetic heating plate of the embodiment of the present application;
[0030] Figure 2 It is a schematic process diagram of forming a ring-shaped electromagnetic coil by winding metal wires in this embodiment;
[0031] Figure 3 It is a schematic cross-sectional structure diagram of the electromagnetic heating plate of an embodiment of the present application.
[0032] Figures 1 to 3 It includes: a heating plate body 1, a ring-shaped electromagnetic coil 2, a metal wire 3, a bearing plate 4, a temperature sensor 5, and a heat insulation layer 6. Detailed Embodiments
[0033] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0034] As Figures 1 to 3 shown, the electromagnetic heating plate for a photovoltaic module laminator in the embodiment of the present application includes a heating plate body and at least one heating module disposed on the lower surface of the heating plate body 1.
[0035] The heating module includes a plurality of ring-shaped electromagnetic coils 2 arranged in an array. The plurality of ring-shaped electromagnetic coils 2 are continuously wound by a metal wire 3. The two ends of the metal wire 3 (such as the A end and the B end in the figure) are respectively used to connect the two poles of the power supply.
[0036] Particularly, the winding directions of two adjacent ring-shaped electromagnetic coils 2 are opposite. After the plurality of ring-shaped electromagnetic coils 2 are energized, the magnetic flux directions of two adjacent ring-shaped electromagnetic coils 2 are opposite.
[0037] After applying an alternating current to a plurality of annular electromagnetic coils 2 through both ends of a wire 3, the alternating current generates an alternating magnetic field in each annular electromagnetic coil 2. The part of the heating plate body 1 corresponding to the electromagnetic coil 2 cuts the magnetic force lines of the alternating magnetic field, so that an alternating current, i.e., eddy current, is generated in the heating plate body 1. The eddy current makes the atoms move at high speed and randomly. The atoms collide and rub against each other to generate heat energy, thus realizing the heating of the heating plate body 1.
[0038] Particularly, after applying electricity to a plurality of annular electromagnetic coils 2, the magnetic flux directions of two adjacent annular electromagnetic coils 2 are opposite. Therefore, the effect of magnetic field enhancement can be generated, thereby improving the electromagnetic utilization rate and achieving rapid heating.
[0039] To implement the rapid winding and forming of a plurality of annular electromagnetic coils 2, optionally, the annular electromagnetic coil 2 is circular or elliptical. Of course, the annular electromagnetic coil 2 can also be rectangular. The rectangular annular electromagnetic coil 2 can reduce the gap between adjacent annular electromagnetic coils 2 and improve the space utilization rate.
[0040] As Figure 2 shown, optionally, a plurality of annular electromagnetic coils 2 are arranged in a rectangular array. Taking the first column of annular electromagnetic coils 2 and the second column of annular electromagnetic coils 2 as an example, the winding process of two adjacent columns of annular electromagnetic coils 2 is as follows: The wire 3 winds from the first starting point a to the first ending point b along the first serpentine path L1 (shown by the solid line) to form a plurality of continuous and staggeredly arranged first half coils. The wire 3 continues to wind from the first ending point b back to the first starting point a along the second serpentine path L2 (shown by the dotted line) to form a plurality of continuous and staggeredly arranged second half coils. A plurality of second half coils are complementary to a plurality of first half coils one by one to form the first column of electromagnetic coils.
[0041] The wire 3 that returns to the first starting point a continues to the second starting point c and then winds from the second starting point c to the second ending point d along the third serpentine path L3 (shown by the solid line) to form a plurality of continuous and staggeredly arranged third half coils. The wire 3 continues to wind from the second ending point d back to the second starting point c along the fourth serpentine path L4 (shown by the dotted line) to form a plurality of continuous and staggeredly arranged fourth half coils. A plurality of fourth half coils are complementary to a plurality of third half coils one by one to form the second column of electromagnetic coils adjacent to the first column of electromagnetic coils.
[0042] Repeating the above process can complete the winding and forming of a plurality of annular electromagnetic coils 2 arranged in a rectangular array. Each annular electromagnetic coil 2 includes a single turn of wire, and the winding directions of two adjacent annular electromagnetic coils 2 are opposite. In this way, after applying electricity to a plurality of annular electromagnetic coils 2 through both ends of the wire 3, the magnetic flux directions of two adjacent annular electromagnetic coils 2 are opposite.
[0043] In another alternative embodiment, the wire 3 sequentially winds and forms each of the annular electromagnetic coils 2. That is, after the wire 3 finishes winding and forming the i-th annular electromagnetic coil, it then winds and forms the (i + 1)-th annular electromagnetic coil. The i-th annular electromagnetic coil is formed by the wire 3 winding at least one turn along the first clockwise direction, and the (i + 1)-th annular electromagnetic coil is formed by the wire 3 winding at least one turn along the second clockwise direction, where the second clockwise direction is opposite to the first clockwise direction. In this way, it can also be ensured that after the two ends of the wire 3 energize multiple annular electromagnetic coils 2, the magnetic flux directions of two adjacent annular electromagnetic coils 2 are opposite. In addition, if each annular electromagnetic coil 2 is formed by the wire 3 winding multiple turns, the magnetic flux of the annular electromagnetic coil 2 after energization can be increased.
[0044] In one implementation, after the wire 3 finishes winding and forming the i-th annular electromagnetic coil, it then winds and forms the (i + 1)-th annular electromagnetic coil. The i-th annular electromagnetic coil is formed by the wire 3 winding two and a half turns along the first clockwise direction, and the (i + 1)-th annular electromagnetic coil is formed by the wire 3 winding two and a half turns along the second clockwise direction, where the second clockwise direction is opposite to the first clockwise direction.
[0045] In another implementation, after the wire 3 finishes winding and forming the i-th annular electromagnetic coil, it then winds and forms the (i + 1)-th annular electromagnetic coil. The i-th annular electromagnetic coil is formed by the wire 3 winding two and a half turns along the first clockwise direction, and the (i + 1)-th annular electromagnetic coil is formed by the wire 3 winding three and a half turns along the second clockwise direction, where the second clockwise direction is opposite to the first clockwise direction.
[0046] The number of winding turns of the i-th annular electromagnetic coil and the number of winding turns of the (i + 1)-th annular electromagnetic coil can be the same or different.
[0047] As Figure 3 shown, optionally, the heating module further includes a carrier plate 4. The carrier plate 4 is provided with a plurality of annular wire grooves arranged in an array. The wire 3 is connected and wound in the plurality of wire grooves to form a plurality of annular electromagnetic coils 2. Winding the wire 3 in the wire grooves on the carrier plate 4 realizes the prefabrication and forming of the heating module. Subsequently, directly mounting the carrier plate 4 on the lower surface of the heating plate body 1 can complete the rapid assembly of the electromagnetic heating plate of the present application. In addition, when the annular electromagnetic coil 2 in the heating module is damaged, the entire heating module can be replaced.
[0048] Optionally, in order to enable the wire 3 to successively complete the winding and forming of each annular electromagnetic coil 2, a connection hole located within the carrier plate 4 is provided between adjacent wire grooves. After the wire 3 completes the winding and forming of the current annular electromagnetic coil 2, it passes through the connection hole and into another adjacent wire groove to implement the winding and forming of another adjacent annular electromagnetic coil 2.
[0049] Optionally, an insulating plate is used as the carrier plate 4. After the heating module is mounted on the heating plate body 1, the insulating plate can play a heat insulation role.
[0050] Optionally, both the carrier plate 4 and the heating plate body 1 are metal plates. Using a metal plate as the carrier plate 4 is beneficial for the heat dissipation of the annular electromagnetic coil 2. In addition, the electromagnetic wires around the annular electromagnetic coil 2 can also be fully utilized to heat the metal plate, and the heat can finally be conducted to the heating plate body 1 through the metal plate, thereby further improving the heating efficiency of the annular electromagnetic coil.
[0051] To reduce heat loss, optionally, after the carrier plate 4 is mounted on the lower surface of the heating plate body 1, a heat insulation layer 6 is laid on the lower surface of the heating plate body 1. The heat insulation layer 6 can be made of, for example, heat insulation cotton.
[0052] Of course, at least one winding area can also be provided on the lower surface of the heating plate body 1. Multiple annular wire grooves arranged in an array are provided within the winding area, and the wire 3 is continuously wound within the multiple wire grooves to form a heating module composed of multiple annular electromagnetic coils 2.
[0053] The annular electromagnetic coil 2 is directly wound into the wire groove on the lower surface of the heating plate body 1, enabling the annular electromagnetic coil 2 to directly heat the heating plate body 1, thereby further improving the heating efficiency.
[0054] Optionally, in order to enable the wire 3 to successively complete the winding and forming of each annular electromagnetic coil 2, a connection hole located within the heating plate body 1 is provided between adjacent wire grooves. After the wire 3 completes the winding and forming of the current annular electromagnetic coil 2, it passes through the connection hole and into another adjacent wire groove to implement the winding and forming of another adjacent annular electromagnetic coil 2.
[0055] To reduce heat loss, optionally, after the winding and forming of the annular electromagnetic coil 2 is completed, a heat insulation layer 6 can be laid on the lower surface of the hot plate body 1.
[0056] Such as Figure 3As shown, optionally, the electromagnetic heating plate in the embodiments of the present application further includes a temperature sensor 5 installed in the heating plate body 1. By arranging the temperature sensor 5 in the heating plate body 1, real-time monitoring of the temperature of the heating plate body 1 is achieved, and finally it is ensured that the heating module heats the heating plate body 1 to a predetermined temperature value. For example, the temperature sensor 5 is signal-connected to the controller of the power supply that provides the alternating current. The temperature sensor 5 transmits the collected temperature value of the heating plate body 1 to the controller of the power supply, and the controller of the power supply generates a control signal based on the temperature value, and finally enables the power supply to input an alternating current of an appropriate magnitude into the ring-shaped electromagnetic coil 2.
[0057] Optionally, the electromagnetic heating plate in the embodiments of the present application includes a plurality of heating modules laid on the hot plate body 1, and the plurality of heating modules are connected in series in sequence. For the large-area heating plate body 1, the plurality of heating modules are regularly distributed in different regions of the heating plate body 1 according to a predetermined rule, so as to form different heating regions on the heating plate body 1 to meet the heating requirements for different pressure-bearing processes. For example, when the electromagnetic heating plate of the present application needs to laminate two photovoltaic modules at the same time, two sets of electromagnetic heating modules can be arranged at intervals on the heating plate body 1.
[0058] Optionally, the plurality of ring-shaped electromagnetic coils 2 are formed by parallel winding of at least two metal wires overlapping in the thickness direction of the heating plate body 1 ( Figure 3 the arrow direction in). In this way, by winding only once, a ring-shaped electromagnetic coil 2 composed of at least two turns of metal wires can be formed. Compared with the ring-shaped electromagnetic coil 2 composed of a single turn of metal wire, the ring-shaped electromagnetic coil 2 composed of at least two turns of metal wires has a larger magnetic flux, further improving the heating performance of the ring-shaped electromagnetic coil 2.
[0059] Of course, in order to ensure that the multi-turn metal coil can be wound tightly in the wire groove, it is necessary to increase the depth of the wire groove.
[0060] The embodiments of the present application also provide a photovoltaic module laminator, which includes the electromagnetic heating plate provided in any of the above embodiments, as well as a conveyor belt, an upper pressing device and a vacuum pumping device. Among them, the conveyor belt is sleeved outside the electromagnetic heating plate, and the conveyor belt is used to convey the photovoltaic module above the electromagnetic heating plate. The electromagnetic heating plate is used to heat the photovoltaic module located above the electromagnetic heating plate. The upper pressing device is used to seal the photovoltaic module located above the electromagnetic heating plate to the electromagnetic heating plate to form a lamination cavity between the electromagnetic heating plate and the upper pressing device. The vacuum pumping device is used to pump vacuum for the lamination cavity, and the upper pressing device is also used to press the photovoltaic module after the photovoltaic module is heated. The laminator provided by the embodiments of the present application performs lamination processing on the photovoltaic module by electromagnetic heating, which reduces the power consumption during the lamination process.
[0061] The above description of the present application is detailed enough and has a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the protection scope of the present application. The scope of protection required by the present application is defined by the claims described, rather than by the above description in the embodiments. Moreover, the embodiments mentioned in the present application do not have to be implemented individually, and some embodiments can also be implemented in combination.
Claims
1. An electromagnetic heating plate for a photovoltaic module laminator, characterized in that, The electromagnetic heating plate includes a heating plate body and at least one heating module disposed on the lower surface of the heating plate body; The heating module includes a plurality of annular electromagnetic coils arranged in an array. The plurality of annular electromagnetic coils are formed by continuously winding a metal wire, and two ends of the metal wire are respectively used for connecting two poles of a power supply; The winding directions of two adjacent annular electromagnetic coils are opposite. After the plurality of annular electromagnetic coils are powered on, the magnetic flux directions of two adjacent annular electromagnetic coils are opposite.
2. The electromagnetic heating plate according to claim 1, wherein, The annular electromagnetic coil is circular, elliptical or rectangular.
3. The electromagnetic heating plate according to claim 1, characterized in that: The plurality of annular electromagnetic coils are arranged in a rectangular array and are configured to be formed by continuously winding a single metal wire; Each annular electromagnetic coil includes one turn of metal wire, and the winding directions of the metal wires of two adjacent annular electromagnetic coils are opposite.
4. The electromagnetic heating plate according to claim 1, characterized in that, The heating module further includes a carrier plate. A plurality of annular wire grooves are arranged in an array on the carrier plate, and the metal wire is connected and wound in the plurality of wire grooves to form the plurality of annular electromagnetic coils; The carrier plate is mounted on the lower surface of the heating plate body.
5. The electromagnetic heating plate according to claim 4, characterized in that, The carrier plate is an insulating plate or a metal plate, and the heating plate is a metal plate.
6. The electromagnetic heating plate according to claim 1, wherein At least one winding area is provided on the heating plate body. A plurality of annular wire grooves are arranged in an array in the winding area, and the metal wire is continuously wound in the plurality of wire grooves to form the heating module composed of the plurality of annular electromagnetic coils.
7. The electromagnetic heating plate according to claim 1, characterized in that, The electromagnetic heating plate further includes a temperature sensor installed in the heating plate body.
8. The electromagnetic heating plate according to claim 1, wherein The electromagnetic heating plate includes a plurality of heating modules laid on the heating plate body, and the plurality of heating modules are connected in series in sequence.
9. The electromagnetic heating plate according to claim 1, characterized in that, The plurality of annular electromagnetic coils are formed by parallel winding of at least two metal wires overlapping in the thickness direction of the heating plate body.
10. The electromagnetic heating plate according to claim 1, characterized in that, For the adjacent i-th annular electromagnetic coil and (i + 1)-th annular electromagnetic coil formed by sequentially winding the metal wire, the i-th annular electromagnetic coil is formed by winding the metal wire at least one turn along a first clockwise direction, and the (i + 1)-th annular electromagnetic coil is formed by winding the metal wire at least one turn along a second clockwise direction, wherein the second clockwise direction is opposite to the first clockwise direction.
11. A laminator, characterized in that, The laminator includes the electromagnetic heating plate according to any one of claims 1 to 10, a conveyor belt, an upper pressing device and a vacuum pumping device. The conveyor belt is sleeved outside the electromagnetic heating plate. The conveyor belt is used for conveying a photovoltaic module above the electromagnetic heating plate. The electromagnetic heating plate is used for heating the photovoltaic module located above the electromagnetic heating plate. The upper pressing device is used for sealing the photovoltaic module located above the electromagnetic heating plate to the electromagnetic heating plate to form a lamination cavity between the electromagnetic heating plate and the upper pressing device. The vacuum pumping device is used for pumping vacuum on the lamination cavity. The upper pressing device is further used for pressing the photovoltaic module after the photovoltaic module is heated.