Auxiliary support module for solar cell module and solar cell system

Abstract

To provide an auxiliary support module for a solar cell module that can realize appropriate and sufficient load resistance for the solar cell module.SOLUTION: An auxiliary support module 40 for a solar cell module 10 installable at an installation site has a removal mechanism 44 that sets the auxiliary support module 40 attachable / removable to / from the solar cell module 10 and can move an attachment / removal location of the auxiliary support module 40 to / from the solar cell module 10, a support receiving part 42 of supporting the solar cell module 10 if a load is burdened on the solar cell module 10, and support leg parts 46 that are provided at the support receiving part 42, and are abutted against the installation site and support the support receiving part 42 when at least a load is burdened on the solar cell module 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an auxiliary support module for a solar cell module and a solar cell system. [Background technology]

[0002] Conventionally, various solar cell systems have been used in which solar cell modules are installed at an installation location (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-59879 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide an auxiliary support module for a solar cell module that can realize an appropriate and sufficient load resistance for the solar cell module. [Means for solving the problem]

[0005] A first embodiment of the present invention is an auxiliary support module for a solar cell module that can be installed at an installation location, comprising: an attachment / detachment mechanism that enables the auxiliary support module to be attached and detached to the solar cell module and that can move the attachment / detachment position of the auxiliary support module relative to the solar cell module; a support receiving portion that supports the solar cell module when a load is applied to the solar cell module; and a support leg that is provided on the support receiving portion and abuts against the installation location to support the support receiving portion at least when a load is applied to the solar cell module.

[0006] In this embodiment, the auxiliary support module is detachable from the solar cell module, and the attachment / detachment position of the auxiliary support module from the solar cell module is movable. Therefore, by mounting an appropriate type and number of auxiliary support modules to the solar cell module at appropriate attachment / detachment positions, and by having the auxiliary support modules support the solar cell module when a load is applied to the solar cell module, it is possible to realize an appropriate and sufficient load resistance for the solar cell module.

[0007] A second embodiment of the present invention is an auxiliary support module for a solar cell module as described in the first embodiment, wherein the support leg forms a clearance with the installation location when no load is applied to the solar cell module, and abuts against the installation location when a load is applied to the solar cell module.

[0008] In this embodiment, when no load is applied to the solar cell module, a clearance is formed between the support legs and the installation location, thereby preventing the installation location from being damaged by the support legs.

[0009] A third embodiment of the present invention is an auxiliary support module for a solar cell module as described in the first or second embodiment, wherein the support leg is detachable from the support receiving portion, and the attachment / detachment position of the support leg relative to the support receiving portion is movable.

[0010] In this embodiment, the support legs are detachable from the support receiver, and the attachment and detachment positions of the support legs relative to the support receiver are movable. Therefore, by attaching an appropriate type and number of support legs to the support receiver at appropriate attachment and detachment positions, it is possible to accommodate installation locations with special shapes and to achieve more appropriate and sufficient load resistance for the solar cell module.

[0011] A fourth embodiment of the present invention is a solar cell system comprising a solar cell module that can be installed at an installation location, and an auxiliary support module for the solar cell module, the auxiliary support module having an attachment / detachment mechanism that enables the auxiliary support module to be attached and detached to the solar cell module and can move the attachment / detachment position of the auxiliary support module relative to the solar cell module, a support receiving portion that supports the solar cell module when a load is applied to the solar cell module, and a support leg portion that is provided on the support receiving portion and abuts against the installation location to support the support receiving portion at least when a load is applied to the solar cell module. This embodiment provides the same effects as the first embodiment. Effect of the Invention

[0012] According to the present invention, it is possible to realize an appropriate and sufficient load resistance for the solar cell module. [Brief description of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view showing a solar cell system according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a bottom view showing the solar cell system according to the first embodiment of the present invention. [Diagram 3] 1 is a side view showing a solar cell system according to a first embodiment of the present invention. [Figure 4] 4A to 4C are bottom views showing a method for attaching the auxiliary support module according to the first embodiment of the present invention. [Diagram 5] 1A and 1B are schematic diagrams showing a solar cell system according to a first embodiment of the present invention in a non-loaded state and a loaded state. [Figure 6] FIG. 5 is a cross-sectional view showing a solar cell system according to a second embodiment of the present invention. [Figure 7] FIG. 11 is a bottom view showing a solar cell system according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A solar cell system according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG.

[0015] The solar cell system of this embodiment will be outlined with reference to Figs. 1 to 3. The solar cell system is installed at a predetermined installation location. In this embodiment, the installation location is the roof 60 of a building. The solar cell system is formed by a solar cell module 10, a fixing bracket 28, and an auxiliary support module 40. The solar cell module 10 can be installed at the installation location via the fixing bracket 28. Furthermore, the auxiliary support module 40 is detachable from the solar cell module 10. Here, the attachment and detachment position of the auxiliary support module 40 with respect to the solar cell module 10 is movable. When a load is applied to the solar cell module 10, the auxiliary support module 40 supports the solar cell module 10 to prevent damage to the solar cell module 10 and increase the load capacity of the solar cell module 10. Here, the solar cell module 10 needs to have a load capacity capable of withstanding the applied load, and the load applied to the solar cell module 10 changes depending on the situation of the installation location of the solar cell module 10. In this embodiment, snowfall is assumed as the load on the solar cell module 10, and the load due to snowfall varies greatly depending on the region and season. In this embodiment, by appropriately setting the type and number of auxiliary support modules 40 to be attached to the solar cell module 10 and the attachment / detachment position of the auxiliary support module 40 relative to the solar cell module 10, a load-bearing capacity capable of withstanding an anticipated load on the solar cell module 10 is achieved.

[0016] The solar cell module 10, the fixing bracket 28, and the auxiliary support module 40 will be described in detail below.

[0017] The solar cell module 10 is formed by a solar cell laminate section 12 and a frame 22. The solar cell laminate section 12 is formed by arranging a large number of solar cells side by side, and has a long plate shape as a whole. The solar cell laminate section 12 is placed on and held by the upper surface side in the height direction of the frame 22. The frame 22 is formed by a pair of vertical frame sections 24 extending in the vertical direction, and a pair of horizontal frame sections 26 extending in the horizontal direction.

[0018] The fixing brackets 28 are for installing the solar cell module 10 at an installation location. In this embodiment, the installation location is the roof 60 of a building, and the installation surface is the roof surface. On the roof 60, a large number of seams 62 protrude from the roof surface, extend in one direction, and are arranged side by side. The fixing brackets 28 are fixed to the roof 62 by clamping the seams 62 of the roof 60 with the clamps of the fixing brackets 28. Then, the frame 22 of the solar cell module 10 is fixed to the fixing brackets 28 by a bolt fixing method, so that the solar cell module 10 is fixed to the fixing brackets 28. In this embodiment, the four fixing brackets 28 are respectively arranged near both ends in the vertical direction and on the lower side in the height direction in a pair of vertical frame parts 24 of the frame 22 of the solar cell module 10.

[0019] In addition, as a method of installing the solar cell module at the installation site, generally, there are two types of installation methods: a rack-attached installation method in which the solar cell module is installed at the installation site by a rack-attached stand, and a rackless installation method in which the solar cell module is installed at the installation site by a rackless fixing bracket as in the present embodiment. In the rack-attached installation method, a rack with a relatively large and strong elongated structure is used, and the rack is fixed to the installation site by fixing both ends to the frame. When a load is applied to the solar cell module, the solar cell module is supported by the rack, so that the load capacity of the solar cell module is large in the rack-attached installation method. In contrast, in the rackless installation method of the present embodiment, if the auxiliary support module 40 is not used, the load capacity is smaller than that of the rack-attached installation method, for example, the load capacity is about 4200 Pa. Of course, if the load capacity of the solar cell module 10 can be small, the auxiliary support module 40 may not be used in the rackless installation method of the present embodiment.

[0020] The auxiliary support module 40 is a removable and movable auxiliary rail with support legs that is compatible with a solar cell module installed by a rackless installation method. That is, the auxiliary support module 40 is formed by an auxiliary rail 42 as a support receiving portion and a support leg 46 as a support leg portion. The auxiliary rail 42 has an elongated structure, and both ends of the auxiliary rail 42 can be attached and detached to any position in the vertical direction of the pair of vertical frame parts 24 of the frame 22. In this embodiment, a clamp member 44 that performs fixing by a clamp fixing method is used as the attachment and detachment mechanism. When both ends of the auxiliary rail 42 are attached to the pair of vertical frame parts 24, respectively, the auxiliary rail 42 extends in the horizontal direction between the pair of vertical frame parts 24. By changing the vertical positions at which both ends of the auxiliary rail 42 are fixed in the pair of vertical frame parts 24, respectively, it is possible to move the attachment and detachment position of the auxiliary rail 42 relative to the frame 22. The support leg 46 extends from one surface of the auxiliary rail 42. When the auxiliary rail 42 is attached to the frame 22, a support leg 46 extends downward from the lower surface of the auxiliary rail 42 in the height direction. In this embodiment, two support legs 46 are used, and are disposed at two positions spaced apart in the longitudinal direction of the auxiliary rail 42. Alternatively, one support leg 46 may be used and disposed in the center of the auxiliary rail 42 in the longitudinal direction.

[0021] 4 and 5, when the auxiliary rail 42 is attached to the frame 22, as shown in Fig. 4, the auxiliary rail 42 is rotated about a rotation axis extending in the height direction, so that both ends of the auxiliary rail 42 are attached to the pair of vertical frame portions 24 of the frame 22. As shown in Fig. 5(a), when the auxiliary rail 42 is attached to the frame 22, a clearance 56 is formed in the height direction between the solar cell laminate portion 12 and the auxiliary rail 42. Therefore, when the auxiliary rail 42 is attached to the frame 22 and after the auxiliary rail 42 is attached to the frame 22, even if no particular load is applied to the solar cell module 10, the solar cell laminate portion 12 and the auxiliary rail 42 are prevented from coming into contact with each other and being damaged.

[0022] When the auxiliary rail 42 is attached to the frame 22, a clearance 58 is formed between the end of the support leg 46 extending from the auxiliary rail 42 and the roof surface. This prevents the end of the support leg 46 from coming into contact with the roof surface and damaging the roof surface after the auxiliary rail 42 is attached to the frame 22. Here, if the clearance 58 is not formed between the end of the support leg 46 and the roof surface of the roof when the auxiliary rail 42 is attached to the frame 22 and there is contact, there is a risk that the end of the support leg 46 will scratch the roof surface and damage the roof surface if the solar cell system vibrates due to external disturbances such as wind.

[0023] As shown in FIG. 5(b), when a load is applied to the solar cell module 10, the solar cell module 10 is deformed so as to bend downward. If the auxiliary support module 40 is not used, the solar cell module 10 is deformed to a state shown by a two-dot chain line in the figure, and the solar cell module 10 may be damaged. In this embodiment, when a load is applied to the solar cell module 10, the solar cell module 10 is deformed so as to bend downward and abuts against the upper surface side of the auxiliary rail 42 in the height direction, and then the auxiliary rail 42 is also pressed by the solar cell module 10 and deformed so as to bend downward, and further, the end of the support leg 46 extending downward from the auxiliary rail 42 moves downward and abuts against the roof surface of the roof beyond the clearance 58, so that the roof surface sequentially supports the support leg 46, the auxiliary rail 42, and the solar cell module 10, sharing the load, and restricting the deformation of the solar cell module 10. In this way, the amount of deformation of the solar cell module 10 is reduced compared to when the auxiliary support module 40 is not used, thereby preventing damage to the solar cell module 10 and increasing the load-bearing capacity of the solar cell module 10.

[0024] In this embodiment, two auxiliary support modules 40 are used, and the two auxiliary support modules 40 are disposed at two positions spaced apart in the vertical direction of the frame 22. By using the auxiliary support modules 40 in this manner, it is possible to realize a load capacity similar to that of the rack-equipped installation method, and it is possible to realize a load capacity of, for example, about 5400 Pa. Furthermore, by using three auxiliary support modules 40 and disposing the three auxiliary support modules 40 at three positions spaced apart in the vertical direction of the frame 22, it is possible to realize a load capacity of, for example, about 7200 Pa.

[0025] Here, when a load is applied to the solar cell module 10, the auxiliary rail 42 is deformed by the amount of clearance 58 between the end of the support leg 46 and the roof surface of the roof. Therefore, the amount of clearance 58 must be limited to less than the amount of plastic deformation of the auxiliary rail 42 so that the auxiliary rail 42 can return to its original shape when the load on the solar cell module 10 is removed.

[0026] The solar cell system of this embodiment has the following advantages. In the solar cell system of this embodiment, the auxiliary support module 40 is detachable from the solar cell module 10, and the attachment / detachment position of the auxiliary support module 40 is movable with respect to the solar cell module 10. Therefore, by mounting an appropriate type and number of auxiliary support modules 40 to the solar cell module 10 at appropriate attachment / detachment positions, and by having the auxiliary support modules 40 support the solar cell module 10 when a load is applied to the solar cell module 10, it is possible to realize an appropriate load resistance for the solar cell module 10.

[0027] Furthermore, when no load is applied to the solar cell module 10, a clearance 58 is formed between the support legs 46 and the roof surface, preventing the roof surface from being damaged by the support legs 46.

[0028] In addition, the same type of auxiliary support module 40 can be used for many types of solar cell modules 10. Also, by preparing a plurality of types of support legs 46 with different lengths, it is possible to correspond to a plurality of types of fixing brackets 28 with different heights. Also, when no clearance 58 is formed between the end of the support leg 46 and the roof surface of the roof and the end of the support leg 46 is in constant contact with the roof surface, the length of the support leg 46 is fixed, so that it is necessary to prepare support legs 46 with lengths corresponding to fixing brackets 28 with slightly different heights. However, when a clearance 58 is formed between the end of the support leg 46 and the roof surface, it is possible to use support legs 46 of the same length for fixing brackets 28 with slightly different heights by using the clearance 58 as a kind of buffer and varying the size of the clearance 58.

[0029] A second embodiment of the present invention will be described with reference to FIGS. In this embodiment, a bolt fixing method is used instead of a clamp fixing method as an attachment / detachment mechanism that allows the auxiliary support module 40 to be attached to and detached from the solar cell module 10 and allows the attachment / detachment position of the auxiliary support module 40 to be moved relative to the solar cell module 10. That is, in order to fix both ends of the auxiliary rail 42 to the pair of vertical frame parts 24 of the frame 22, bolts 50 and screw holes 52, 54 that fix by a bolt fixing method are used instead of clamp members 44 that fix by a clamp fixing method. Here, in the auxiliary support module 40, screw holes 52 are drilled at both ends in the longitudinal direction of the auxiliary rail 42. And, in the solar cell module 10, a number of screw holes 54 are drilled in the vertical frame parts 24 of the frame 22 at a predetermined distance from each other in the vertical direction. Both ends of the auxiliary rail 42 are fixed to the pair of vertical frame parts 24 by screwing bolts 50 into the screw holes 52 at both ends of the auxiliary rail 42 and into a pair of screw holes 54 at the same positions in the vertical direction of the pair of vertical frame parts 24 of the frame 22. By changing the pair of screw holes 54 of the pair of vertical frame parts 24 that fix both ends of the auxiliary rail 42, it is possible to vertically move the attachment / detachment position of the auxiliary rail 42 with respect to the frame 22.

[0030] In the first and second embodiments, a clamp fixing method and a bolt fixing method are used as the attachment / detachment mechanism that allows the auxiliary support module 40 to be attached to and detached from the solar cell module 10 and allows the attachment / detachment position of the auxiliary support module 40 relative to the solar cell module 10 to be moved, respectively, but it is possible to use other various fixing methods of attachment / detachment mechanisms. In one modification, a movable reinforcement type clamp unit is used to fix both ends of the auxiliary rail 42 to a pair of vertical frame parts 24 of the frame 22. The movable reinforcement type clamp unit is formed by a movable part, a clamp part, and a tightening part. The movable part is disposed on the auxiliary rail 42 and is movable in the longitudinal direction of the auxiliary rail 42, allowing the entire clamp unit to move in the longitudinal direction of the auxiliary rail 42. The clamp part is capable of clamping the vertical frame part 24 of the frame 22 with the clamp unit disposed at the end of the auxiliary rail 42, allowing the clamp unit to be fixed to the vertical frame part 24. The tightening portion consists of a bolt and nut mechanism, and while the vertical frame portion 24 is clamped by the clamp portion, the clamp portion can be tightened to increase the clamping force, making it possible to firmly fix the clamp unit to the vertical frame portion 24.

[0031] A third embodiment of the present invention will now be described. In this embodiment, the support leg 46 is detachable from the auxiliary rail 42, and the attachment / detachment position of the support leg 46 relative to the auxiliary rail 42 is movable. A bolt fixing method is used as a mechanism for attaching and detaching the support leg 46 to the auxiliary rail 42. That is, a screw hole is drilled at one end of the support leg 46, and a number of screw holes are drilled in the auxiliary rail 42 at a predetermined distance apart in the longitudinal direction. The support leg 46 is fixed to the auxiliary rail 42 by screwing a bolt into the screw hole at one end of the support leg 46 and one of the many screw holes of the auxiliary rail 42. By changing the screw hole of the auxiliary rail 42 to which the one end of the support leg 46 is fixed, the attachment / detachment position of the support leg 46 relative to the auxiliary rail 42 can be moved in the longitudinal direction of the auxiliary rail 42. By appropriately setting the type, such as the length and number, of the support legs 46 attached to the auxiliary rail 42, and the attachment and detachment positions of the support legs 46 relative to the auxiliary rail 42, it is possible to accommodate even special roof shapes, and it is possible to more appropriately distribute the load applied to the solar cell module 10, further reduce the amount of deformation, and further increase the load-bearing capacity. [Explanation of symbols]

[0032] 10... solar cell module 40... auxiliary support module 42... auxiliary rail 44...Clamp member 46...Support leg 50...Bolt 52...Screw hole 54...Screw hole 58…Clearance

Claims

1. An auxiliary support module for a solar cell module that can be installed at an installation site, comprising: The solar cell module includes a solar cell module body and a holding member that holds the solar cell module body, The auxiliary support module includes: an attachment / detachment mechanism that enables the auxiliary support module to be attached to and detached from the holding member of the solar cell module and that can move an attachment / detachment position of the auxiliary support module with respect to the holding member of the solar cell module; a support receiving portion that forms a clearance between the solar cell module and a solar cell module main body when no load is applied to the solar cell module and that supports the solar cell module main body when a load is applied to the solar cell module; a support leg provided on the support receiving portion, the support leg abutting against the installation location to support the support receiving portion when a load is applied to at least the solar cell module; An auxiliary support module for a solar cell module comprising:

2. the support leg forms a clearance between the support leg and the installation location when no load is applied to the solar cell module, and abuts against the installation location when a load is applied to the solar cell module. The auxiliary support module for a solar cell module according to claim 1 .

3. An auxiliary support module for a solar cell module that can be installed at an installation site, comprising: an attachment / detachment mechanism that enables the auxiliary support module to be attached to and detached from the solar cell module and that can move an attachment / detachment position of the auxiliary support module with respect to the solar cell module; a support receiving portion that supports the solar cell module when a load is applied to the solar cell module; a support leg provided on the support receiving portion, the support leg abutting against the installation location to support the support receiving portion when a load is applied to at least the solar cell module; Equipped with The support leg is detachable from the support receiving part, and the attachment / detachment position of the support leg with respect to the support receiving part is movable. Auxiliary support module for solar cell modules.

4. A solar cell module that can be installed at an installation location; an auxiliary support module for the solar cell module; Equipped with The solar cell module includes a solar cell module body and a holding member that holds the solar cell module body, The auxiliary support module includes: an attachment / detachment mechanism that enables the auxiliary support module to be attached to and detached from the holding member of the solar cell module and that can move an attachment / detachment position of the auxiliary support module with respect to the holding member of the solar cell module; a support receiving portion that forms a clearance between the solar cell module and a solar cell module main body when no load is applied to the solar cell module and that supports the solar cell module main body when a load is applied to the solar cell module; a support leg provided on the support receiving portion, the support leg abutting against the installation location to support the support receiving portion when a load is applied to at least the solar cell module; having Solar cell system.

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