JP2015186421A - Concentrating photovoltaic power generation module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concentrating solar power generation module capable of obtaining optimum power generation efficiency regardless of the temperature of an installation place.
A concentrating solar power generation module 1M includes a casing 11 having an opening 11a on one surface and a plurality of power generating elements arranged in alignment on a bottom surface 17a of a bottom plate 17 in the casing 11. A plurality of Fresnel lenses 13f that are attached to the casing 11 so as to cover the portion 21 and the opening surface 11a and are opposed to the bottom plate 17 and condense sunlight are arranged on the respective optical axes. 21 and a lens panel 13 formed at a corresponding position. The housing 11 is formed with a plurality of groove portions 30 that hold the bottom plate 17 so that the distance between the power generating element portion 21 and the lens panel 13 can be adjusted.
[Selection] Figure 4

Description

  The present invention relates to a concentrating solar power generation module used for concentrating photovoltaic power generation (CPV: Concentrator Photovoltaic).

  The unit constituting the optical system basic unit of concentrating solar power generation includes, for example, a primary lens that is a convex lens, a secondary lens that is a spherical lens, and a power generation element (see, for example, Patent Document 1 (FIG. 1). 8)). As the power generation element, a solar battery cell with high power generation efficiency is used. Sunlight is condensed by the primary lens and guided to the secondary lens, and further condensed by the secondary lens and irradiated to the power generation element. With this configuration, large energy can be concentrated on a small power generation element, and power can be generated with high efficiency. A large number of such concentrating solar power generation units are arranged in a matrix to form a concentrating solar power generation module, and a large number of such modules are arranged in a matrix to form a concentrating solar power generation panel. A concentrating solar power generation panel constitutes a concentrating solar power generation device together with a driving device for causing the panel to perform a tracking operation toward sunlight.

The module includes a front plate on which the primary lens is provided, a back plate on which a power generation element is provided, and an outer frame that holds the front plate and the back plate with a predetermined gap therebetween. ing.
At this time, the distance between the front plate and the back plate is set to such a value that the highest possible efficiency can be obtained according to the focal length of the primary lens.

US Patent Application Publication US2010 / 0236603 A1

  The concentrating solar power generation module is assumed to be installed in various environments, but the expected power generation efficiency may not be obtained depending on the installation environment, particularly the temperature of the installation location.

  This invention is made | formed in view of such a situation, and it aims at providing the concentrating solar power generation module which can obtain optimal electric power generation efficiency irrespective of the temperature of an installation place.

A concentrating solar power generation module according to the present invention includes a housing having an opening surface on one surface;
A plurality of power generating elements arranged in alignment on the bottom surface of the bottom plate in the housing;
A plurality of condensing lenses that are attached to the casing and are opposed to the bottom plate so as to cover the opening surface, and condense sunlight, correspond to the power generation elements on respective optical axes. A light collecting member formed on
A holding portion that is provided in the housing and holds the bottom plate so that a distance between the power generation element and the light collecting member can be adjusted.

  According to the present invention, optimum power generation efficiency can be obtained regardless of the temperature of the installation location.

It is a perspective view which shows an example of a concentrating solar power generation device. It is a perspective view (partially fractured) which expands and shows an example of a concentrating solar power generation module. It is a schematic diagram showing a concentrating solar power generation unit. It is a partial sectional view of the case concerning a 1st embodiment. It is a figure which shows the aspect at the time of fitting the bottom plate of the module of this embodiment in a groove part, (a) is a figure which shows the aspect at the time of fitting the bottom plate from the surface which removed the wall board, (b) is an inside. It is a figure which shows the aspect at the time of attaching a wall board to the housing | casing which accommodated the baseplate. It is a partial cross section figure of the housing | casing which concerns on 2nd Embodiment. It is a partial cross section figure of the housing | casing which concerns on 3rd Embodiment. It is a partial cross section figure of the housing | casing which concerns on 4th Embodiment. It is a figure which shows the aspect at the time of attaching the wall board by which the lens panel was fixed to the baseplate in this embodiment. It is a partial cross section figure of the housing | casing which concerns on the modification of 4th Embodiment. It is a partial cross section figure of the housing | casing which concerns on the other modification of 4th Embodiment.

[Description of Embodiment of Present Invention]
The inventors of the present application are conducting extensive research on the concentrating solar power generation module, and the major factor regarding the inability to obtain the power generation efficiency expected due to the temperature of the installation site is the expansion and contraction of the casing caused by the temperature difference and the primary The knowledge that it is a change of the refractive index of a lens and a secondary lens was acquired.

That is, the concentrating solar power generation module according to the conventional example includes an outer frame that holds a predetermined distance between the primary lens and the power generation element. Since this outer frame is generally formed of metal or resin, thermal expansion and contraction and distortion occur depending on the temperature of the installation location.
For this reason, for example, even if each part is designed and manufactured based on a temperature of 20 ° C., if it is installed in a place where the temperature is higher, thermal expansion or distortion occurs in the housing, and the distance between the primary lens and the power generation element is initially There is a risk of changing to a value different from the design value.
Furthermore, if the refractive index of the primary lens and the secondary lens changes according to the temperature of the installation location, the focal length of each lens changes, and the optimum value of the distance between the primary lens and the power generation element changes. .

In other words, since the distance between the primary lens and the power generation element changes depending on the temperature of the installation location, or the focal length of the lens changes, the optimal power generation efficiency included in the dimension of the distance between the primary lens and the power generation element It is conceivable that the error with respect to the value capable of obtaining the value of the module increases and the power generation efficiency of the module decreases.
The inventors of the present application have completed the present invention by paying attention to the above points.

First, the contents of the embodiments of the present invention will be listed and described.
(1) A concentrating solar power generation module according to an embodiment of the present invention includes a housing having an opening surface on one side and a plurality of power generations arranged on the bottom surface of a bottom plate in the housing. A plurality of condensing lenses that are attached to the casing and are opposed to the bottom plate so as to cover the opening surface and condense sunlight, and the power generation element on each optical axis. A condensing member formed at a corresponding position, and a holding portion that is provided in the housing and holds the bottom plate so that the interval between the power generation element and the condensing member can be adjusted. .

  According to the concentrating solar power generation module having the above-described configuration, since the holding portion that holds the bottom plate is provided so that the interval between the power generating element and the condensing member can be adjusted, The distance between the power generation element and the light collecting member can be appropriately set according to the temperature of the installation location. As a result, optimal power generation efficiency can be obtained regardless of the temperature of the installation location.

(2) In the concentrating solar power generation module, the holding unit can selectively set one set value as the interval from among a plurality of preset different set values. Is preferably adjustable. In this case, when the interval is to be adjusted so that the positional relationship between the plurality of power generating elements and the light collecting member is appropriate, for example, if the interval can be adjusted steplessly, the adjustment work Becomes very fine and cumbersome. On the other hand, if one setting value can be selectively set as the interval from a plurality of different setting values set in advance as in the above configuration, an appropriate setting value can be selected from the plurality of setting values. What is necessary is just to obtain | require a value and the said space | interval can be adjusted easily compared with the case where the said space | interval can be adjusted in a stepless manner.

(3) In the concentrating solar power generation module, the housing includes a wall plate that is erected along a peripheral edge of the bottom plate, and whose tip edge forms the opening surface. The portion is provided on an inner surface of the wall plate, and includes a plurality of groove portions that hold the bottom plate by fitting an end edge of the bottom plate, and the plurality of groove portions are respectively located at different positions in the bottom plate. It is preferable to be formed so as to hold.
In this case, since the groove part with which the space | interval of an electric power generation element and a condensing member is optimal can be selected from several groove parts, the space | interval of an electric power generation element and a light condensing member can be set easily and optimally.

(4) Moreover, in the said concentrating solar power generation module, the said housing | casing is equipped with the wall board in which the front-end edge forms the said opening surface while standingly arranged along the periphery of the said baseplate, The holding portion includes a dowel that protrudes from an inner surface of the wall plate and holds the bottom plate, and an insertion hole that is provided on the inner peripheral surface and into which the dowel is inserted. May be formed at a plurality of locations so that the bottom plate can be held at a plurality of positions at different intervals.
In this case, since the insertion hole that optimizes the distance between the power generation element and the light collecting member can be selected from the plurality of insertion holes, the distance between the power generation element and the light collection member can be easily and optimally set. Can do.

(5) In the concentrating solar power generation module, the housing includes a second bottom plate that holds the bottom plate from the opposite side of the bottom surface, and the holding portion includes the second bottom plate and the second bottom plate. An adjustment member that is disposed between the two bottom plates and the bottom plate and adjusts the interval so that the one set value can be selectively set as the interval from the plurality of set values. .
In this case, the distance between the power generation element and the light collecting member can be easily and optimally set by changing the dimension of the adjustment member that adjusts the distance between the bottom plate and the light collecting member.

(6) In the concentrating solar power generation module, the bottom plate includes an edge wall portion integrally formed along a peripheral edge of the bottom surface, and the housing extends along an outer surface of the edge wall portion. A wall plate having a front edge that forms the opening surface, the holding portion being in contact with a side surface of the edge wall portion, and a frictional force between the side wall and the side surface of the edge wall portion; It is preferable that it is comprised by the side part of the wall board holding the said baseplate.
In this case, the side plate of the wall plate, which is the holding unit, holds the bottom plate by a frictional force between the side wall and the side surface of the edge wall, so that the bottom plate can be moved along the wall plate. Thereby, the space | interval of a power generation element and a condensing member can be set easily and optimally.

(7) The concentrating solar power generation module may further include a fixing portion that fixes the wall plate and the edge wall portion. In this case, the bottom plate can be more firmly held.

(8) (9) Moreover, the said fixing | fixed part may be the adhesive bond layer which adhere | attaches and fixes both to the said wall board and the said edge wall part, The said wall board, and the said edge wall part It may be a fixing bolt for fixing the. In this case, the bottom plate can be held more firmly.

[Details of the embodiment of the present invention]
Hereinafter, preferred embodiments will be described with reference to the drawings.
[1. Concentration type solar power generation module configuration)
FIG. 1 is a perspective view showing an example of a concentrating solar power generation device. In the figure, a concentrating solar power generation device 100 includes a concentrating solar power generation panel 1, a support 2 that supports the concentrating solar power generation panel 1 on the back side, and a gantry 3 to which the support 2 is attached.
The concentrating solar power generation panel 1 is formed by assembling a large number of concentrating solar power generation modules 1M vertically and horizontally. In this example, 62 (vertical 7 × horizontal 9-1) concentrating solar power generation modules 1M, excluding the central portion, are gathered vertically and horizontally. If the rated output of one concentrating solar power generation module 1M is about 100 W, for example, the entire concentrating solar power generation panel 1 has a rated output of about 6 kW.
A driving device (not shown) is provided on the back side of the concentrating solar power generation panel 1, and by operating this driving device, the concentrating solar power generation panel 1 is always in the direction of the sun. It can be tracked to turn.

FIG. 2 is an enlarged perspective view (partially broken) showing an example of a concentrating solar power generation module (hereinafter also simply referred to as a module) 1M. Three directions orthogonal to each other are assumed to be X, Y, and Z in the drawing.
In the figure, the module 1M includes a container-like housing 11 having a bottom plate 17 in the XY plane, a plurality of flexible printed wiring boards 12 provided on the bottom surface 17a of the bottom plate 17, and an opening surface 11a of the housing 11. And a rectangular (partially broken) lens panel 13 (light condensing member).

The housing 11 is made of a metal made of, for example, an aluminum alloy, and has the opening surface 11a on one surface as described above.
In addition, the housing 11 includes a wall plate 15 erected on the periphery of the bottom plate 17. The wall plate 15 is provided over the entire circumference of the bottom plate 17.
The front edge 15a of the wall plate 15 forms an opening surface 11a by forming an opening 11b that opens the inside of the housing 11 to the outside.
The lens panel 13 is fixed to the leading edge 15a.
A connector 14 for taking out the output of the module 1M is provided on one surface of the wall plate 15.

The lens panel 13 is a Fresnel lens array, and a plurality of Fresnel lenses 13f as lens elements for condensing sunlight are formed in a matrix (for example, 192 in the length 16 × width 12). Each Fresnel lens 13f forms a square effective condensing region. Such a lens panel 13 can be formed by, for example, using a glass plate as a base material and forming a silicone resin film on the back surface (inside) thereof. The Fresnel lens 13f is formed on this silicone resin film.
The lens panel 13 is attached to the leading edge 15a so as to cover the opening surface 11a. Accordingly, the lens panel 13 is disposed to face the bottom plate 17.

  The flexible printed wiring board 12 includes a ribbon-like flexible substrate 16 provided with a necessary conductive pattern, and a plurality of power generation element portions 21 provided on the flexible substrate 16. In the illustrated example, the flexible printed wiring board 12 is mounted with eight power generating element portions 21. The flexible printed wiring boards 12 are arranged in a plurality of rows along the longitudinal direction of the casing 11, and 24 flexible printed wiring boards 12 are arranged as a whole. Therefore, the total number of power generating element portions 21 is 192, which is 24 × 8. That is, the number of power generation element portions 21 is the same as the number of Fresnel lenses 13f of the lens panel 13, and the power generation element portions 21 are provided on the optical axis corresponding to the Fresnel lenses 13f.

  The Fresnel lens 13f and the power generation element unit 21 provided in correspondence with each other constitute a concentrating solar power generation unit as an optical system basic unit constituting the module 1M.

FIG. 3 is a schematic diagram showing a concentrating solar power generation unit.
In FIG. 3, the solar power generation unit (hereinafter also simply referred to as a unit) 20 includes the Fresnel lens 13 f and the power generation element unit 21 as described above.
The Fresnel lens 13f condenses sunlight incident from the incident surface 13f1 on the power generation element portion 21 provided correspondingly.

The power generation element unit 21 includes a solar battery cell 23 that is a power generation element and a ball lens 24.
The solar cells 23 are packaged on the flexible substrate 16 by a resin frame 22 that surrounds the periphery with the light receiving surface 23a exposed.

The Fresnel lens 13f is arranged so that the optical axis S of the Fresnel lens 13f is parallel to the Z direction, and the optical axis S passes through substantially the center of the light receiving surface 23a.
Further, the ball lens 24 is arranged at a position where the center of the ball lens 24 can be guided to the light receiving surface 23a appropriately by being arranged so that the center of the ball lens 24 passes through the optical axis S.

The distance D in the Z direction between the light receiving surface 23a of the solar battery cell 23 and the lens panel 13 (Fresnel lens 13f) is set based on the focal length of the lens panel 13 (Fresnel lens 13f).
That is, the distance D is set to a value that allows the sunlight collected by the lens panel 13 (Fresnel lens 13f) to be collected as efficiently as possible on the light receiving surface 23a and to obtain optimum power generation efficiency.

  Here, as described above, in the concentrating solar power generation module in which the primary lens and the power generation element are separated by the housing of the module, the primary lens and the power generation element Since the distance between the lens and the focal length of the lens changes, an error occurs with respect to the distance between the primary lens and the power generation element that can obtain the optimum power generation efficiency, and as a result, the power generation efficiency of the module may decrease. is there.

  For this reason, the concentrating solar power generation module 1 </ b> M of the present embodiment is configured such that the interval D can be adjusted by adjusting the position of the bottom plate 17 with respect to the lens panel 13.

[2. Regarding the configuration of the housing according to the first embodiment]
FIG. 4 is a partial cross-sectional view of the housing 11 according to the first embodiment.
As described above, the housing 11 of the present embodiment includes the bottom plate 17 and the wall plate 15 erected on the periphery of the bottom plate 17.
A flexible printed wiring board 12 is provided on the bottom surface 17 a of the bottom plate 17, and the power generation element portion 21 is disposed.

A flange portion 15 a 1 extending toward the outside of the housing 11 is formed at the leading edge 15 a of the wall plate 15.
The lens panel 13 is fixed to the flange portion 15a1 and is fixed to the wall plate 15 so as to cover the opening surface 11a.

On the other hand, the bottom plate 17 facing the lens panel 13 is held on the wall plate 15 by a groove 30 formed on the inner side surface 15 b of the wall plate 15.
The groove portion 30 is formed in each of the wall plates 15 surrounding the four sides of the bottom plate 17, and holds the bottom plate 17 by fitting the entire periphery of the edge of the bottom plate 17.

  On the edge of the bottom plate 17, a flange portion 17 b that is fitted in the groove portion 30 is provided. The flanges 17 b are provided at the four end edges of the bottom plate 17 and are fitted into the groove portions 30 of the wall plates 15 surrounding the four sides of the bottom plate 17.

  A resin layer 31 made of a silicone resin, an acrylic resin, or the like is formed on the joint portion where the bottom plate 17 is fitted in the groove portion 30 from the inner side surface 15b of the wall plate 15 to the edge of the outer side surface 17c of the bottom plate 17. . The resin layer 31 prevents the intrusion of external moisture and dust from the joint portion while adhering and fixing the bottom plate 17 and the groove portion 30 to each other.

  A plurality of grooves 30 are formed on the inner side surface 15 b of the wall plate 15. Each groove part 30 is formed so as to hold the bottom plate 17 at a position where the distance D in the Z direction between the solar battery cell 23 of the power generation element part 21 and the lens panel 13 is different.

  For example, if the thickness dimension of the bottom plate 17 is 1 mm, the groove width dimension W of each groove part 30 is set to 0.5 mm, and the pitch P between adjacent groove parts 30 is set to 1 mm. Moreover, the thickness dimension of the collar part 17b is smaller than a groove width dimension (0.5 mm), and is set to a value that allows the bottom plate 17 to be slid and fitted along the groove part 30 as will be described later.

  Thus, the interval D is adjusted in units of 1 mm by setting the pitch P between the adjacent groove portions 30 to 1 mm.

  According to the concentrating solar power generation module 1M of the present embodiment configured as described above, the bottom plate 17 can adjust the distance D in the Z direction between the solar battery cell 23 and the lens panel 13 by the plurality of grooves 30. Therefore, the interval D can be appropriately adjusted according to the temperature of the place where the concentrating solar power generation module is installed. As a result, optimal power generation efficiency can be obtained regardless of the temperature of the installation location.

  For example, if the temperature at which optimum power generation efficiency is obtained is specified for each groove 30, the groove 30 at the optimum position from among the plurality of grooves 30 according to the temperature of the place where the module 1M is to be installed. Can be selected. Thereby, the space | interval D can be set easily and optimally.

As described above, the plurality of groove portions 30 of the present embodiment are provided in the housing 11 and have a holding portion that holds the bottom plate 17 so that the distance D between the solar battery cell 23 and the lens panel 13 can be adjusted. It is composed.
In other words, the plurality of groove portions 30 constituting the holding portion sets a plurality of setting values set as the interval D by setting the pitch P between the adjacent groove portions 30 to 1 mm.
The plurality of groove portions 30 can adjust the interval D by selectively setting one set value as the interval D from among a plurality of different set values set in advance.

  Thereby, for example, when it is going to adjust the space | interval D so that the positional relationship with the several photovoltaic cell 23 and the lens panel 13 may become appropriate, suppose that the space | interval D is adjustable steplessly, for example. The adjustment work becomes very fine and complicated. On the other hand, if one setting value can be selectively set as the interval D from a plurality of different setting values set in advance as in the present embodiment, the setting value is appropriately selected from the plurality of setting values. The distance D can be easily adjusted as compared with the case where the distance D can be adjusted steplessly.

FIG. 5 is a diagram illustrating an aspect when the bottom plate 17 of the module 1M of this embodiment is fitted into the groove 30. FIG.
As shown in FIG. 5A, first, the wall plate 15 is removed from the housing 11 only on one side, and the bottom plate 17 is slid along the groove 30 from one side from which the wall plate 15 is removed. .
As the groove portion 30 into which the bottom plate 17 is fitted, the groove portion 30 at the optimum position is selected in advance according to the temperature of the place where the module 1M is to be installed.

As shown in FIG. 5B, when the bottom plate 17 is accommodated inside the housing 11, the removed wall plate 15 is attached, and then the resin layer 31 (FIG. 4) is formed.
As described above, it is possible to obtain the module 1M in which the interval D is appropriately adjusted according to the temperature of the installation place.

[3. Regarding the configuration of the housing according to the second embodiment]
FIG. 6 is a partial cross-sectional view of the housing 11 according to the second embodiment.
This embodiment is different from the first embodiment in that the bottom plate 17 is held by the dowel 50.

The dowel 50 is, for example, a metal pin, and is inserted into an insertion hole 51 formed in the inner side surface 15 b of the wall plate 15.
The dowel 50 protrudes from the inner side surface 15b while being inserted into the insertion hole 51, and the bottom plate 17 is held by this protruding portion.
At least four dowels 50 form one set, and one set of dowels 50 holds the bottom plate 17.

  When one set is constituted by four dowels 50, the four dowels 50 are arranged so as to hold both ends of each of the two long sides of the bottom plate 17, for example. Thereby, the baseplate 17 can be hold | maintained stably. Note that each side can be held using a larger number of dowels 50, such as a plurality of dowels 50.

A concave portion 52 is formed on the outer surface 17 c of the bottom plate 17 at a position corresponding to the dowel 50. The recess 52 is formed corresponding to the shape of the dowel 50.
The bottom plate 17 is held in a state where the dowel 50 is fitted in the recess 52. Therefore, the bottom plate 17 is positioned in the XY direction with respect to the wall plate 15 by the dowel 50.

In the present embodiment, the insertion hole 51 is formed at a plurality of locations such that one set of dowels 50 can hold the bottom plate 17 at a plurality of positions with different intervals D.
Therefore, for example, if the temperature at which optimum power generation efficiency is obtained is specified for each of a plurality of positions having different intervals D, the insertion holes 51 at a plurality of positions are determined according to the temperature of the place where the module 1M is to be installed. The insertion hole 51 at the optimum position can be selected from the inside. Thereby, the space | interval D can be set easily and optimally.

  In order to bond and fix both of the end surface of the bottom plate 17 to the inner surface 15b of the wall plate 15 from the inner surface 15b of the wall plate 15 to the edge of the outer surface 17c of the bottom plate 17 The resin layer 31 is formed.

  Note that one set of dowels 50 of the present embodiment and a plurality of insertion holes 51 into which the dowels 50 are inserted are provided in the housing 11, and the distance D between the solar battery cell 23 and the lens panel 13 is adjusted. The holding part which hold | maintains the baseplate 17 is comprised possible.

The plurality of insertion holes 51 into which the dowels 50 are inserted are formed at a plurality of positions so that the dowel 50 can hold the bottom plate 17 at a plurality of positions where the distances D are different. It is set.
One set of dowels 50 constituting the holding portion and a plurality of insertion holes 51 into which the dowels 50 are inserted are selectively set at a distance D from a plurality of different preset values. The interval D can be adjusted by enabling the setting as follows.

[4. Regarding the configuration of the housing according to the third embodiment]
FIG. 7 is a partial cross-sectional view of the housing 11 according to the third embodiment.
This embodiment is different from the first embodiment in that the housing 11 includes a second bottom plate 40 that holds the bottom plate 17 from the opposite side of the bottom surface 17a.

The second bottom plate 40 is formed integrally with the wall plate 15. On the inner side surface 40 a of the second bottom plate 40, an adjustment member 42 made up of a plate-like member 41 is disposed.
The plate-like members 41 constituting the adjustment member 42 are fixed to each other so as not to move relative to each other by an adhesive or the like. The adjustment member 42 is bonded and fixed to the inner side surface 40a of the second bottom plate 40 and the outer side surface 17c of the bottom plate 17 with an adhesive or the like.

  The adjustment member 42 is disposed between the bottom plate 17 and the second bottom plate 40. The adjusting member 42 can adjust the interval D by changing the number of plate-like members 41 and the thickness.

  Also in this embodiment, the module 1M is installed if the temperature at which optimum power generation efficiency is obtained is specified for each combination of the plate-like members 41 for holding the bottom plate 17 at a plurality of positions having different intervals D. The optimal combination of the plate-like members 41 can be selected according to the temperature of the place where the attempt is to be made. Thereby, the space | interval D can be set easily and optimally.

In addition, the 2nd bottom plate 40 of this embodiment and the adjustment member 42 interposed between the 2nd bottom plate 40 and the bottom face 17a are provided in the housing | casing 11, and the space | interval D of the photovoltaic cell 23 and the lens panel 13 is provided. The holding part which hold | maintains the baseplate 17 so that adjustment is possible is comprised.
That is, the adjustment member 42 interposed between the bottom surfaces 17a sets a plurality of setting values that are set as the interval D by changing the number and thickness of the plate-like members 41.
The second bottom plate 40 constituting the holding portion and the adjustment member 42 interposed between the second bottom plate 40 and the bottom surface 17a can be adjusted to a plurality of different intervals D, and any one of the plurality of intervals D can be adjusted. By selecting, the interval D can be adjusted.

[5. Regarding Configuration of Housing According to Fourth Embodiment]
FIG. 8 is a partial cross-sectional view of the housing 11 according to the fourth embodiment.
In the present embodiment, the bottom plate 17 includes an edge wall portion 55 integrally formed along the periphery of the bottom surface 17a, the inner side surface 15b of the wall plate 15 and the edge wall portion 55 are in contact with each other, and friction between each other This is different from the first embodiment in that the bottom plate 17 is held by force.

The edge wall portion 55 of the bottom plate 17 is integrally provided on four sides of the bottom plate 17 so as to extend toward the lens panel 13 side.
The outer side surface 55a of the edge wall portion 55 is in contact with the inner side surface 15b of the wall plate 15 so as to be slidable. At this time, the outer dimension of the outer surface 55a of the edge wall 55 and the inner dimension of the inner surface 15b of the wall plate 15 can be slidably contacted with each other while the wall plate 15 and the edge wall 55 are in sliding contact with each other. Is set to such a value that the interval D can be maintained.

FIG. 9 is a diagram showing an aspect when the wall plate 15 to which the lens panel 13 is fixed is attached to the bottom plate 17 in the present embodiment.
In this embodiment, as shown in the drawing, the wall plate 15 is attached so that the upper lid is attached to the bottom plate 17.

In this case, since the inner side surface 15b of the wall plate 15 and the outer side surface 55a of the edge wall portion 55 are slidably contacted, the bottom plate 17 can be moved along the wall plate 15 in the Z-axis direction.
Therefore, for example, if the value of the height dimension h (FIG. 8) of the entire module 1M at a predetermined reference temperature is obtained as a set value for obtaining optimum power generation efficiency for each temperature of the installation location of the module 1M. The distance D can be set easily and optimally by adjusting the height dimension h according to the temperature of the installation location.

  Returning to FIG. 8, when the wall plate 15 is attached to the bottom plate 17 and adjusted so that the distance D becomes a predetermined value, then, at the joint portion between the wall plate 15 and the edge wall portion 55, A resin layer 56 is formed as a fixing portion for bonding and fixing the two.

The inner surface 15b of the wall plate 15 is in contact with the outer surface 55a of the edge wall portion 55, and has a function as a holding portion that holds the bottom plate 17 by a frictional force with the outer surface 55a of the edge wall portion 55. However, the holding force may be insufficient with the frictional force alone.
In this respect, in this embodiment, since the resin layer 56 for bonding and fixing the both is formed, the bottom plate 17 can be held more firmly.

FIG. 10 is a partial cross-sectional view of the housing 11 according to a modification of the fourth embodiment.
This modified example is different from the above embodiment in that the edge wall portion 55 integrally formed along the periphery of the bottom plate 17 extends in the direction opposite to the lens panel 13 side.

  Even in the case of using the bottom plate 17 as in this modification, the bottom plate 17 can be moved along the wall plate 15 in the Z-axis direction. By adjusting the height dimension h, the distance D can be easily and optimally set.

FIG. 11 is a partial cross-sectional view of the housing 11 according to another modification of the fourth embodiment.
In this modification, the edge wall portion 55 formed on the bottom plate 17 is in contact with the outer surface 15 c of the wall plate 15, and the edge wall portion 55 and the wall plate 15 are connected to each other by the fixing bolt 60. It is different from the above embodiment in that it is fixed.

The bottom plate 17 of this modification is formed such that the edge wall portion 55 extends toward the lens panel 13, and the inner side surface 55 b is in slidable contact with the outer side surface 15 c of the wall plate 15. .
A long hole 61 through which the fixing bolt 60 is inserted is formed in the edge wall portion 55. The long hole 61 is formed so that the fixing bolt 60 can be inserted in a range necessary for adjusting the distance D in the housing 11.

  A screw hole 62 is formed in the wall plate 15 at a position corresponding to the long hole 61. A female screw is formed on the inner peripheral surface of the screw hole 62, and the fixing bolt 60 is screwed together.

The fixing bolt 60 is inserted into the long hole 61 and screwed into the screw hole 62, and the edge wall portion 55 and the wall plate 15 are fastened to fix them.
According to this modification, the outer surface 15 c of the wall plate 15 contacts the inner side surface 55 b of the edge wall portion 55, and holds the bottom plate 17 by the frictional force with the inner side surface 55 b of the edge wall portion 55. However, in addition to this, the bottom plate 17 can be more firmly held by fastening and fixing the edge wall portion 55 and the wall plate 15 with the fixing bolt 60.

  In this modified example, the joint portion between the wall plate 15 and the edge wall portion 55 is bonded to the inside of the housing 11 for the purpose of preventing external moisture, dust, and the like from entering. A resin layer 56 for fixing is formed.

  Also in this modification, since the bottom plate 17 can be moved along the wall plate 15 in the Z-axis direction, the height dimension h can be adjusted by adjusting the height dimension h according to the temperature of the installation place, as in the above embodiment. D can be set easily and optimally.

[6. Conclusion)
In each of the above embodiments, the case of the configuration including the ball lens 24 that is the secondary condenser lens in addition to the Fresnel lens 13f that is the primary condenser lens is illustrated, but the present invention is not limited thereto. Instead of the ball lens, a configuration including a reflector may be used, or a configuration not including an element for secondary condensing may be used.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Concentration type photovoltaic power generation panel 1M Concentration type photovoltaic power generation module 2 Support | pillar 3 Base 11 Housing | casing 11a Opening surface 11b Opening 12 Flexible printed wiring board 13 Lens panel 13f Fresnel lens 13f1 Incidence surface 14 Connector 15 Wall board 15a Tip edge 15a1 flange portion 15b inner side surface 15c outer side surface 16 flexible substrate 17 bottom plate 17a bottom surface 17b flange portion 17c outer side surface 20 solar power generation unit 21 power generation element portion 22 resin frame 23 solar battery cell 23a light receiving surface 24 ball lens 30 groove portion 31 resin layer 40 Second bottom plate 40a Inner side surface 41 Plate-shaped member 42 Adjustment member 50 Dowel 51 Insertion hole 52 Recessed portion 55 Edge wall portion 55a Outer side surface 55b Inner side surface 56 Resin layer 60 Fixing bolt 61 Long hole 62 Screw hole 100 Concentrating solar power generation device D interval h Height dimension S Optical axis

Claims (9)

A housing having an opening on one side;
A plurality of power generating elements arranged in alignment on the bottom surface of the bottom plate in the housing;
A plurality of condensing lenses that are attached to the casing and are opposed to the bottom plate so as to cover the opening surface, and condense sunlight, correspond to the power generation elements on respective optical axes. A light collecting member formed on
A concentrating solar power generation module comprising: a holding portion that is provided in the housing and holds the bottom plate so that an interval between the power generation element and the light collecting member can be adjusted.   The said holding | maintenance part is enabled to adjust the said space | interval by selectively setting one said setting value as the said space | interval from the several different setting values set beforehand. Concentrating solar power generation module. The housing includes a wall plate that is erected along the periphery of the bottom plate and whose tip edge forms the opening surface,
The holding portion is provided on an inner surface of the wall plate, and includes a plurality of groove portions for holding the bottom plate by fitting an end edge of the bottom plate.
The concentrating solar power generation module according to claim 2, wherein each of the plurality of groove portions is formed to hold the bottom plate at a position where the interval is different. The housing includes a wall plate that is erected along the periphery of the bottom plate and whose tip edge forms the opening surface,
The holding portion is provided with a dowel that protrudes from an inner surface of the wall plate and holds the bottom plate, and an insertion hole that is provided on the inner peripheral surface and into which the dowel is inserted,
The concentrating solar power generation module according to claim 2, wherein the insertion hole is formed at a plurality of locations so as to be able to hold the bottom plate at a plurality of positions having different intervals. The housing includes a second bottom plate that holds the bottom plate from the opposite side of the bottom surface,
The holding portion is disposed between the second bottom plate, the second bottom plate, and the bottom plate, and is configured to selectively set the one set value as the interval from the plurality of set values. The concentrating solar power generation module according to claim 2, further comprising: an adjustment member that adjusts The bottom plate includes an edge wall portion integrally formed along a peripheral edge of the bottom surface,
The housing includes a wall plate that is erected along the outer side surface of the edge wall portion and whose tip edge forms the opening surface.
The said holding | maintenance part is a collection of Claim 1 comprised by the side part of the wall board which contacts the side surface of the said edge wall part, and hold | maintains the said baseplate with the frictional force between the side surfaces of the said edge wall part. Optical photovoltaic module.   The concentrating solar power generation module according to claim 6, further comprising a fixing portion that fixes the wall plate and the edge wall portion.   The concentrating solar power generation module according to claim 7, wherein the fixing portion is an adhesive layer that adheres to and fixes the wall plate and the edge wall portion.   The concentrating solar power generation module according to claim 7, wherein the fixing portion is a fixing bolt that fixes the wall plate and the edge wall portion.

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