Patch heating type photovoltaic module laminating machine and electromagnetic heating device used by same

Abstract

The utility model aims to overcome the defects that an electromagnetic coil of an electromagnetic induction heating device of a laminating machine in the prior art is wound on a fixed column, alternating current acts on the fixed column to enable the fixed column to generate heat, and the fixed column is used as a heating source to heat a heating plate, so that the heat utilization rate is low. The utility model provides a patch heating type photovoltaic module laminating machine and a used electromagnetic heating device, the patch type electromagnetic heating device for the photovoltaic module laminating machine comprises a heating plate, the heating plate is used for bearing and supporting a photovoltaic module in a laminating process, the heating plate is a magnetic conductive heating plate, the patch type electromagnetic heating plate also comprises a patch type electromagnetic heating sheet, and the patch type electromagnetic heating sheet is arranged on the heating plate. The patch type electromagnetic heating sheet comprises an electromagnetic coil and a non-magnetic-conductive electromagnetic coil support, and by adopting the patch type electromagnetic heating device disclosed by the utility model, the heating plate can generate heat and is a heat source, so that the patch type electromagnetic heating device has no energy loss and is high in heat utilization efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic laminators, and in particular relates to a laminator with a heating plate using electromagnetic heating and a heating device thereof. Background Art

[0002] Photovoltaic module laminators are important equipment for encapsulating photovoltaic cells. With the development of photovoltaic industry technology, higher requirements are placed on the production capacity and energy consumption of photovoltaic modules. Since the modules need to be hot-pressed and cured during the production of photovoltaic module encapsulation, the heating and curing process is the main energy consumption process. Manufacturers have made improvements in heating devices in order to obtain lower energy and higher efficiency. Electromagnetic heating has gradually been valued by manufacturers because of its safety and reliability. For example,

[0003] The Chinese invention patent entitled Electromagnetic induction heating device and laminator having the same, with publication number 114828318A and publication date 2022.07.29, discloses an electromagnetic induction heating device, such as Figure 6 As shown, it includes a hot press plate (11), an electromagnetic induction heater, a plurality of electromagnetic induction wires (12) and a controller. A plurality of annular grooves (13) are provided on the bottom surface of the hot press plate (11) along the thickness direction thereof. The plurality of electromagnetic induction wires (12) are wound one by one on the fixed posts (14) in the plurality of annular grooves (13). The plurality of electromagnetic induction wires (12) are electrically connected to the electromagnetic induction heaters respectively. The controller is electrically connected to the electromagnetic induction heater. Its working principle is that the electromagnetic induction wires are wound on the fixed posts in the annular grooves to form an electromagnetic induction heater. The electromagnetic induction heater generates an alternating current. The alternating current generates an alternating magnetic field in the electromagnetic induction coil. The fixed posts are placed therein to cut the alternating magnetic lines of force, thereby generating an alternating current, i.e., an eddy current, inside the fixed posts. The eddy current causes the atoms inside the object to move irregularly at high speed. The atoms collide and rub against each other to generate heat energy, thereby achieving the effect of heating the fixed posts. The fixed posts transfer the heat to the entire hot press plate. With this structure, the electromagnetic induction of the electromagnetic coil acts on the fixed column, and the fixed column generates heat. The heat source is the fixed column, which needs to transfer the heat to the heating plate. There is heat loss in the process of transfer, and from Figure 6 It can be seen that the fixed columns are distributed in a dotted pattern, so the heating of the heating plate is dotted, which easily causes uneven heating of the heating plate. In order to increase the uniformity of heating, a large number of annular grooves need to be opened on the heating plate and the fixed columns need to be fixed in the annular grooves, which makes the manufacturing of the heating plate more complicated, and the energy utilization rate of the entire laminator is relatively low and the manufacturing cost is high. Utility Model Content

[0004] The purpose of the utility model is to provide a patch heating type photovoltaic module laminator and an electromagnetic heating device used therein to address the shortcomings of the prior art laminator, in which the electromagnetic coil of the electromagnetic induction heating device is wound around a fixed column, the alternating current acts on the fixed column to generate heat, and the fixed column is used as a heating source to heat the heating plate, resulting in low heat utilization rate.

[0005] The technical solution of the utility model to solve the technical problem is as follows:

[0006] An electromagnetic heating device for a patch heating photovoltaic module laminator, comprising a heating plate, the heating plate being used to carry and support the photovoltaic module during the lamination process, the heating plate being a magnetic conductive heating plate, and also comprising a patch type electromagnetic heating sheet, the patch type electromagnetic heating sheet comprising an electromagnetic coil and a non-magnetic electromagnetic coil support, the electromagnetic coil being arranged on the electromagnetic coil support, the electromagnetic coil being fixedly arranged on one side surface of the heating plate by the electromagnetic coil support, and the electromagnetic coil causing the heating plate to heat up by electromagnetic induction;

[0007] A coil slot is provided on the electromagnetic coil support, and the electromagnetic coil is located in the coil slot;

[0008] The electromagnetic coil support is a rectangular plate, the coil slot is in a plane spiral shape, and each turn of the coil slot is in a rectangle similar to the electromagnetic coil support so that each turn of the electromagnetic coil is in a rectangle similar to the electromagnetic coil support;

[0009] An electromagnetic controller is correspondingly arranged for each electromagnetic coil; and / or the arrangement of the electromagnetic coils is unevenly distributed, and the arrangement density of at least two turns of the electromagnetic coils is high; and / or the arrangement of the electromagnetic coils is unevenly distributed, and the arrangement density of at least two turns of the electromagnetic coils is high, and the distance between the electromagnetic coils with high arrangement density and the adjacent electromagnetic coils is smaller than the arrangement density between the adjacent electromagnetic coils themselves.

[0010] A patch heating photovoltaic module laminator, comprising the patch type electromagnetic heating device mentioned above;

[0011] It also includes a patch-type electric heating sheet, which is fixedly arranged on one side surface of the heating plate, and the patch-type electromagnetic heating plate and the patch-type electric heating sheet are fully distributed on the same side surface of the heating plate;

[0012] The heating plate is divided into a lamination zone and a side zone, the lamination zone is located at the center of the heating plate, the side zone is arranged around the lamination zone, the side zone includes side zone one and side zone two located on both sides of the lamination zone in the horizontal direction, and side zone three and side zone four located on both sides of the lamination zone in the longitudinal direction, side zone one and side zone two are located between side zone three and side zone four, the lamination zone and each side zone are respectively provided with at least one patch type electromagnetic heating plate or patch type electric heating plate, the lamination zone and each side zone are respectively provided with at least one temperature sensor, the temperature sensor is arranged in a temperature measuring hole arranged on the lower surface of the heating plate, the heat source temperature in the side zone is higher than the heat source temperature in the lamination zone so as to keep consistent with the lamination temperature;

[0013] The electromagnetic heating controller is connected to the temperature sensor signal, and the electromagnetic heating controller controls the electromagnetic coil heating according to the temperature measured by the temperature sensor;

[0014] The temperature measuring hole is arranged vertically with respect to the heating plate body, and occupies two-thirds to three-quarters of the thickness of the heating plate body; and / or the width of the edge area is 100-400mm;

[0015] Each patch-type electromagnetic heating sheet and patch-type electric heating sheet is respectively provided with at least one corresponding temperature sensor.

[0016] The advantages and beneficial effects of the utility model are:

[0017] With the patch-type electromagnetic heating device of the utility model, since the electromagnetic induction coil is wound on the electromagnetic coil tray made of non-magnetic material, no alternating current will be generated on the electromagnetic coil tray, and only alternating current can be generated on the magnetic heating plate arranged corresponding to the electromagnetic induction coil. Therefore, the heating plate itself can generate heat, and the heating plate itself is a heat source. Therefore, there is no energy loss and the heat utilization efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a top view of the structure of an embodiment of a patch type heating device of the utility model, which uses a patch type electromagnetic heating sheet as a heater;

[0019] Figure 2 It is a schematic diagram of a top view of the structure of another embodiment of the patch type heating device of the utility model;

[0020] Figure 3 It is a schematic diagram of a top view of the structure of another embodiment of the patch type heating device of the utility model;

[0021] Figure 4 It is a schematic diagram of a top view of the structure of another embodiment of the patch type heating device of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of an embodiment of a patch-type electromagnetic heating sheet of the utility model;

[0023] Figure 6 It is a schematic structural diagram of an embodiment of an electromagnetic induction heating device in the prior art.

[0024] Description of Reference Numerals

[0025] 1. Heating plate; 101. Laminating area; 102. Side area one; 103. Side area two; 104. Side area three; 105. Side area four; 106. Temperature measuring hole; 2. Temperature measuring sensor; 3. Electromagnetic heating controller; 4. Electromagnetic coil; 5. SMD electric heating plate; 6. SMD electromagnetic heating plate; 601. Electromagnetic coil support; 602. Coil slot. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited by them. Figure 1 The directions shown are described below.

[0027] The heating device and laminator structure of the utility model are described in detail below in conjunction with the drawings and embodiments. This embodiment is only a specific description of the inventive concept of the utility model, and is not a limitation of the inventive concept. Various modifications inspired by the inventive concept are within the protection scope of the utility model.

[0028] The patch heating laminator of the utility model comprises a heating plate 1 and a patch heating sheet, and during the lamination process, the heating plate 1 carries, supports and heats the photovoltaic module. The heating plate and the patch heating sheet constitute a patch heating device.

[0029] like Figure 1-5 As shown, in one embodiment of the utility model, the patch-type heating device includes a heating plate 1 and a patch-type electromagnetic heating plate 6. The heating plate 1 is made of a material that can be electromagnetically heated, preferably a steel plate, a carbon steel plate, etc. The patch-type electromagnetic heating plate preferably adopts the following structure, including an electromagnetic coil 4 and an electromagnetic coil support 601. The electromagnetic coil support is made of a non-magnetic material. A coil groove 602 is provided on one side surface of the electromagnetic coil support. The electromagnetic coil is wound and arranged in the coil groove 602. The top surface of the electromagnetic coil is preferably coplanar with the top surface of the electromagnetic coil support, so that it can better contact with the magnetic material to generate electromagnetic induction. The electromagnetic coil support is usually in the shape of a rectangular plate, and the coil groove is provided on the surface of one side plate, and each coil groove is located in the same plane. The use of a rectangular plate can facilitate the arrangement of the electromagnetic heating plate on the heating plate, so that the electromagnetic coils are arranged one by one in connection with each other, which is conducive to the uniformity of the heating of the heating plate. A connecting structure is provided on the electromagnetic coil support for fixed connection with the heating plate of the magnetic material. The patch-type electromagnetic heating plate is fixedly provided on the surface of one side of the heating plate through the connecting structure and the connecting device. The winding method of the electromagnetic coil is as follows Figure 5The rectangular coil is spirally wound, and the distance between adjacent coils in the coil can be equal or unequal, and the geometric shape formed by the peripheral edge of the rectangular plate-shaped electromagnetic coil is preferably an approximate quadrilateral. In this way, when multiple patch-type electromagnetic heating sheets are arranged in an array, the heating plate is heated more evenly.

[0030] Bolt holes are usually provided on the electromagnetic coil support as a connection structure. The patch type electromagnetic heating sheet is fixed to the lower surface of the heating plate through bolts and bolt holes.

[0031] All SMD electromagnetic heating sheets can be arranged on the heating plate, or SMD electromagnetic heating sheets and SMD electric heating sheets can be mixed and used. SMD electromagnetic heating sheets and SMD electric heating sheets are collectively referred to as SMD heating sheets.

[0032] The patch type electric heating sheet is a prior art structure, which usually includes a tray, and an electric heating wire groove is arranged on one side surface of the tray. The electric heating wire groove is arranged in a spiral shape, and the electric heating wire is routed in the electric heating wire groove. Bolt holes are arranged on the tray. When multiple patch type electric heating sheets are arranged, it is best for each electric heating sheet to be the same and evenly arranged. A cover plate is arranged above the tray of the electric heating sheet, and the electric heating wire is encapsulated in the electric heating wire groove by the cover plate and the tray. Usually, the tray and cover plate of the patch type electric heating sheet are rectangular, and the electric heating wire groove is rectangular as a whole and forms an approximate rectangle with the tray and the cover plate.

[0033] like Figure 1-4As shown, the structures of four patch-type heating devices are given. On the heating plate, the heating plate is divided into two large partitions, one of which is located in the center of the heating plate and is used to laminate photovoltaic modules, called the lamination zone 101, which corresponds to the area A1×A2 in the figure. The other partition is located at the edge of the heating plate and surrounds the lamination zone 101 and is called the side zone. The side zone is divided into four partitions, namely, side zone one 102 and side zone two 103 located on both sides of the lamination zone in the transverse direction, side zone one 102 corresponds to the area A2×B1 in the figure, side zone two 103 corresponds to the area A2×B2 in the figure, and side zone three 104 and side zone four 105 located on both sides of the lamination zone in the longitudinal direction, wherein side zone three and side zone four occupy the transverse direction of the heating plate, side zone three 104 corresponds to the area (B1+A1+B2)×C1 in the figure, side zone four 105 corresponds to the area (B1+A1+B2)×C2 in the figure, and side zone one and side zone two are located between side zone three and side zone four. The edge area and the lamination area are all covered with patch heaters. It is best that the heating power of the patch heater in the edge area is higher than the heating power of the patch heater in the lamination area. The purpose of zoning the heating plate is to control the calorific value of the heat source in the lamination area and edge area of ​​the heating plate separately, increase the power of the heat source in the edge area, and make its calorific value higher than the calorific value of the patch heater in the lamination area, so as to solve the problem of uneven temperature distribution on the heating plate as a whole caused by the temperature of the edge area of ​​the heating plate being lower than that of the lamination area due to the fast heat dissipation of the edge area, thereby affecting the temperature uniformity of the lamination area, so that the temperature of each part of the heating plate, especially in the lamination area, can tend to be consistent.

[0034] When both the lamination area and the edge area use patch-type electromagnetic heating sheets, the winding density of the electromagnetic coil of the patch-type electromagnetic heating sheet located in the edge area is generally greater than the winding density of the electromagnetic coil of the patch-type electromagnetic heating sheet located in the lamination area. In this way, within a unit area, the power of the electromagnetic coil of the edge area is greater than the power of the electromagnetic coil of the lamination area, so that the heating value of the area of ​​the heating plate corresponding to the edge area is higher than the heating value of the area of ​​the heating plate opposite to the lamination area, thereby offsetting the heat lost in the edge area.

[0035] When the patch type electromagnetic heating sheet and the patch type electric heating sheet are used together, the arrangement method can be as follows according to the principle of facilitating temperature control. Figure 2 As shown, side areas 3 and 4 are both equipped with patch-type electric heating sheets, and side areas 1, 2 and the lamination area are both equipped with patch-type electromagnetic heating sheets. Figure 3 As shown, the lamination area uses a patch type electromagnetic heating sheet, and the edge area uses a patch type electric heating sheet. Figure 4 As shown, side areas 1 and 2 both use patch-type electric heating sheets, and side areas 3, 4 and the lamination area all use patch-type electromagnetic heating sheets.

[0036] A temperature measuring hole is provided on the lower surface of the heating plate. The temperature measuring hole is a blind hole vertically arranged on the lower surface of the heating plate, and occupies three quarters to two thirds of the thickness of the entire heating plate. A probe of a temperature sensor is provided in the temperature measuring hole. At least one temperature measuring hole is provided in each edge area and lamination area so that the temperature of each edge area and lamination area is detected. It is best to provide at least one temperature measuring hole corresponding to each patch-type heating plate so as to detect the temperature of the heating plate in the area corresponding to each patch-type heating plate. Since the temperature measuring hole is located at a position between three quarters and two thirds of the thickness of the heating plate, the temperature obtained is the temperature after the heat on the heating plate is diffused, so that the test result is closer to the actual temperature of the heating plate.

[0037] It is best to set an electromagnetic controller for each patch type electromagnetic heating plate, and each patch type electromagnetic heating plate is controlled by the electromagnetic controller.

[0038] The width of the side area is 100-400 mm, preferably 300 mm.

[0039] In the present utility model, in a better embodiment, the distribution density of the electromagnetic coil is non-uniformly distributed, the density of the electromagnetic coil is larger in some parts, and smaller in some parts. For example, the density of the electromagnetic coil along the edge of the electromagnetic coil support plate is larger than the density of the inner circle of the electromagnetic coil. This can prevent the problem of low local temperature of the heating plate caused by the installation structure or the wide edge of the electromagnetic coil support plate without electromagnetic coils between two adjacent patch-type electromagnetic sheets. For example, the arrangement density of several circles of electromagnetic coils along the edge of the electromagnetic coil support plate is greater than the arrangement density of the electromagnetic coils located in the middle part. In this way, the density of the electromagnetic coils located in the edge of the electromagnetic coil support plate is greater than that of other parts. Therefore, the heating plate corresponding to it has a relatively high heat generation, which can be diffused to its periphery through heat conduction to compensate for the temperature of the low-temperature area where the electromagnetic coil is not set. It is best that the distance between the two adjacent electromagnetic coils between the high-density area of ​​the electromagnetic coil and the low-density area of ​​the electromagnetic coil is greater than the distance between the electromagnetic coils in the low-density area, so that the temperature between the high-density area and the low-density area is the same as the temperature between the high-density area and the low-density area. Figure 5 In the figure, the red and green lines are high-density areas of the electromagnetic coil, and the pink line is the low-density area. Figure 5 In the embodiment, since no electromagnetic coil is arranged in the central portion, the density of the electromagnetic coil in the central portion is also higher than the density of the electromagnetic coil in the middle portion.

Claims

1. An electromagnetic heating device for a patch heating photovoltaic module laminator, comprising a heating plate, the heating plate being used to carry and support the photovoltaic module during the lamination process, characterized in that: The heating plate is a magnetic heating plate and also includes a patch-type electromagnetic heating plate. The patch-type electromagnetic heating plate includes an electromagnetic coil and a non-magnetic electromagnetic coil support. The electromagnetic coil is arranged on the electromagnetic coil support. The electromagnetic coil is fixedly arranged on one side surface of the heating plate through the electromagnetic coil support. The electromagnetic coil heats the heating plate through electromagnetic induction.

2. The electromagnetic heating device used in a patch heating photovoltaic module laminator according to claim 1, characterized in that: A coil slot is arranged on the electromagnetic coil support, and the electromagnetic coil is located in the coil slot.

3. The electromagnetic heating device used in a patch heating photovoltaic module laminator according to claim 2, characterized in that: The electromagnetic coil support is a rectangular plate, the coil slot is in a plane spiral shape, and each circle of the coil slot is in a rectangle similar to the electromagnetic coil support, so that each circle of the electromagnetic coil is in a rectangle similar to the electromagnetic coil support.

4. The electromagnetic heating device for a patch heating photovoltaic module laminator according to claim 1, characterized in that: An electromagnetic controller is correspondingly arranged for each electromagnetic coil; and / or the arrangement of the electromagnetic coils is unevenly distributed, and the arrangement density of at least two turns of the electromagnetic coils is high; and / or the arrangement of the electromagnetic coils is unevenly distributed, and the arrangement density of at least two turns of the electromagnetic coils is high, and the distance between the electromagnetic coils with high arrangement density and the adjacent electromagnetic coils is smaller than the arrangement density between the adjacent electromagnetic coils themselves.

5. A patch heating photovoltaic module laminator, characterized in that: An electromagnetic heating device used in a patch heating photovoltaic module laminator according to any one of claims 1 to 4.

6. The patch heating photovoltaic module laminator according to claim 5, characterized in that: It also includes a patch-type electric heating sheet, which is fixedly arranged on one side surface of the heating plate, and the patch-type electromagnetic heating plate and the patch-type electric heating sheet are fully distributed on the same side surface of the heating plate.

7. The patch heating photovoltaic module laminator according to claim 5, characterized in that: The heating plate is divided into a lamination zone and a side zone. The lamination zone is located at the center of the heating plate. The side zone is arranged around the lamination zone. The side zone includes side zone one and side zone two which are respectively arranged on both sides of the lamination zone in the horizontal direction, and side zone three and side zone four which are respectively arranged on both sides of the lamination zone in the longitudinal direction. Side zone one and side zone two are located between side zone three and side zone four. The lamination zone and each side zone are respectively provided with at least one patch-type electromagnetic heating plate or patch-type electric heating plate. The lamination zone and each side zone are respectively provided with at least one temperature sensor. The temperature sensor is arranged in a temperature measuring hole arranged on the lower surface of the heating plate. The heat source temperature in the side zone is higher than the heat source temperature in the lamination zone so as to keep it consistent with the lamination temperature.

8. The patch heating photovoltaic module laminator according to claim 7, characterized in that: The electromagnetic heating controller is connected to the temperature sensor signal, and the electromagnetic heating controller controls the heating of the electromagnetic coil according to the temperature measured by the temperature sensor.

9. The patch heating photovoltaic module laminator according to claim 7, characterized in that: The temperature measuring hole is arranged vertically to the heating plate body, and occupies two-thirds to three-quarters of the thickness of the heating plate body; and / or the width of the edge area is 100-400mm.

10. The patch heating photovoltaic module laminator according to claim 7, characterized in that: Each patch-type electromagnetic heating sheet and patch-type electric heating sheet is respectively provided with at least one corresponding temperature sensor.

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