JP4828290B2 - Sunlight reflecting structure and equipment using the structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar light reflection structure and a facility using the structure which can enhance the freedom in installation by controlling a direction of emitted light by a simple structure which does not need a large-scaled system. <P>SOLUTION: A retroreflection structure which reflects the incident light in the same direction as that of the incident light is provided on a reflector 4 reflecting the solar light reached the ground. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a sunlight reflecting structure that reflects sunlight that reaches the earth as it is to the universe to suppress global warming and urban heat island phenomenon, and equipment using the structure. In particular, the present invention relates to a sunlight reflecting structure for the purpose of preventing light pollution to neighboring buildings and equipment using the structure.

It is known that the energy of sunlight that reaches the earth hits the ground surface, buildings, etc. and is absorbed as heat as it is. This absorption of solar energy on the ground is thought to increase global warming and urban heat island phenomena.
For this reason, technology that suppresses the absorption of solar energy on the ground by installing reflectors that reflect sunlight on buildings such as buildings, and applying highly reflective paints to the skin of buildings Has been developed (see, for example, Patent Document 1).
JP-A-8-189161

  However, in the case of this conventional technique, since the outgoing direction of the reflected light changes depending on the incident angle of sunlight, it is necessary to consider that the outgoing light does not hit the surrounding buildings, etc. Space is greatly limited.

  The present invention was made in view of the above-described conventional circumstances, and can control the direction of emitted light with a simple structure that does not require a large-scale system, and can improve the degree of freedom of installation, and An object is to provide equipment using the structure.

In order to solve the above-described problems, the present invention provides a solar reflective structure for suppressing global warming and heat island, which includes a reflective function part that reflects sunlight that reaches the ground. A retroreflective structure that reflects in the incident direction is provided.
Thereby, the light irradiated from the sun and incident on the reflection function part is reflected in the same direction as the incident direction when retroreflecting. For this reason, if it is in the environment where sunlight directly enters, emitted light hits a surrounding building etc. and is reduced.

The retroreflective structure, input Shako may be constructed by combining reflecting surfaces to reflect in the same direction as the incident direction.

Further, the retroreflective structure, for example, it is possible to each other which contact neighboring constituting the reflecting surface units composed of a plurality of reflecting surfaces orthogonal to each other.

It is desirable to set the shape and the installation angle of the reflection function unit so that the emission region having a high directivity probability of the non- retroreflected light is directed to the vicinity of the zenith.

The sunlight reflecting structure may be attached to currency creation.

Further, when actually installed, it may be provided a transparent coating layer on the front surface of the reflection function portion. In this case, since the front surface of the reflection function part having the retroreflection structure is covered with the transparent coating layer, direct adhesion of dirt to the reflection function part is prevented by the transparent coating layer.

Moreover, when installed outside (eg roof or the outer wall, etc.) of buildings, the thermal insulation layer provided on the back of the front Symbol reflection function portion, it is desirable to attach to the outside of the building through the heat insulating layer. In this case, the reflection function part and the heat insulating layer suppress the influence of heat from the outside of the building in the summer, and suppress the dissipation of the heating heat from the room in the winter.

Also, before Symbol reflective function unit may be provided with a photocatalyst layer draining function unit. In this case, the photocatalyst layer naturally decomposes dirt by receiving ultraviolet rays of sunlight. Further, the dirt decomposed in the photocatalyst layer is washed away by rainwater or the like due to the hydrophilicity of the photocatalyst layer, and is discharged to the outside through the drainage function part.

The solar light reflecting structure can be applied to various facilities as described in claim 2 .

  According to the present invention, since the reflection function unit reflects light in the same direction as the incident direction of sunlight, the direction of the emitted light can be reliably controlled while having a very simple structure that does not require a large-scale system. In addition, it is possible to suppress global warming and heat island phenomenon while reducing problems such as reflected light hitting surrounding buildings. Therefore, even in a narrow space surrounded by buildings or the like, it can be installed without any problem, so that the degree of freedom of installation is greatly improved as compared with the conventional one.

In addition , by appropriately setting the shape and installation angle of the reflection function part, the exit area with high directivity probability of non-retroreflected light is directed near the zenith that does not affect surrounding buildings, etc. A large amount of reflected light including an effective amount of retroreflected light can be returned to the universe without causing light damage to surrounding buildings.

Also, eliminating the dirt adhering to the reflection function portion by a transparent coating layer is provided on the front surface of the reflection function portion, less stains the front of the reflection function portion by flushing the dirt adhered to the transparent coating layer by rain water or the like Since the state can be maintained, the maintainability is improved.

Furthermore, the blocking action of sunlight by reflection function unit, by the action of the heat insulating layer on the back of the reflective function unit, can be maintained while the indoor environment comfortable with reduced energy consumption for heating and cooling. In the invention according to claim 7, since energy consumption can be suppressed, there is an effect of reducing the amount of generated CO2, and further global warming can be achieved.

In addition , due to the degradation and hydrophilic action of the dirt by the photocatalyst, the dirt adhering to the reflective function part can be washed away naturally with rain water, etc., and discharged to the outside of the reflective function part through the drainage function part. The required performance can be maintained over a long period of time.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, common parts are denoted by common reference numerals, and a part of overlapping parts will not be described.

[First embodiment]
FIG. 1 is a plan view (A) showing reflecting surfaces 6a, 6b, 6c of a reflecting material 4 (reflecting surface unit) constituting a sunlight reflecting structure according to the present invention, and the reflecting surfaces 6a, 6b, 6c are continuous. FIG. 2 is a cross-sectional view of the reflecting material 4. FIG.

  The reflecting material 4 constituting the reflecting function portion is made of a highly reflective material such as a mirror or an aluminum plate, and has three triangular reflecting surfaces 6a, 6b, 6c orthogonal to each other as shown in FIG. In combination, the basic elements of the retroreflective structure are formed. However, the reflecting surfaces 6a, 6b, and 6c are not only directly formed on a highly reflective material, but also formed on a non-highly reflective member with three triangular walls perpendicular to each other, and the walls are highly reflective. It is also possible to deposit or apply a functional material. The reflecting material 4 is provided with the reflecting surfaces 6a, 6b, 6c having the above retroreflective structure regularly arranged as shown in FIG. 1 (B) and FIG.

  As shown in FIG. 2, for example, the reflecting surfaces 6a, 6b, and 6c of the reflecting material 4 have sunlight a incident on one reflecting surface 6a (6b, 6c) and the reflecting surface 6a (6b, 6c). By reflecting on the other reflection surface 6b (6c, 6a), the reflected light b is emitted in the same direction as the incident direction of sunlight a.

[Second Embodiment]
FIG. 3 is a plan view (A) showing the reflecting surfaces 106a, 106b, 106c, 106d of the reflecting material 104 constituting the sunlight reflecting structure according to the present invention, and the reflecting surfaces 106a, 106b, 106c, 106d are continuous. It is the figure which combined and described the top view (B) which shows a mode.
The retroreflective structure of the second embodiment is constituted by two rectangular reflective surfaces 106a and 106b orthogonal to each other and two triangular reflective surfaces 106c and 106d orthogonal to the reflective surfaces 106a and 106b. ing.

  Here, the reflective surfaces 106a and 106b orthogonal to the reflective surfaces 106a and 106b are formed in a triangular shape, but the remaining reflective surfaces 106c and 106d are formed in a convex or concave square according to the environment around the installation location. It can also be formed into a shape. Of course, the shapes of the remaining reflecting surfaces 106c and 106d are not limited to those described here, but may be arc shapes or other shapes.

  The reflectors 4 and 104 described as the first and second embodiments so far are, for example, as shown in FIG. 4 (in FIG. Can be installed.

  As described above, the reflectors 4, 104 adopting the sunlight reflecting structure according to the present invention are configured by combining the reflecting surfaces 6a, 6b, 6c (106a, 106b, 106c, 106d) so as to retroreflect sunlight. Therefore, when the sunlight is retroreflected, the sunlight can be reliably reflected to the outside of the atmosphere without causing a problem that the reflected light hits the surrounding building. For this reason, it can be installed easily and with a high degree of freedom even in the environment of an urban building where many buildings are lined up around it. Moreover, since the reflecting materials 4 and 104 can accurately control the reflected light with an extremely simple structure provided with a retroreflective structure, a large-scale system is not required and the cost for installation and maintenance is reduced. Can do.

  By the way, when the reflector 4,104 adopting the sunlight reflecting structure according to the present invention is actually fixedly installed on a building, the ground, or the like, the reflector 4,104 is changed on the reflector 4,104 due to a change in the position of the sun due to a change in season or time. The actual situation is that it is impossible to retroreflect all incident light completely because the reflecting surface, the incident angle, the number of reflections, and the like that are actually reflected constantly change. However, when the reflectors 4 and 104 using the sunlight reflecting structure according to the present invention are fixedly installed, a large amount of effective reflected light components can be obtained even with non-retroreflected reflected light. This will be described in detail below.

As shown in FIG. 5, the sky near the zenith often has no shielding such as a building a even in an urban area. For this reason, even if it is non-recursive reflection, it can be said that it is effective reflection with no harm of the reflected light with respect to the surrounding building a in the sky area where the zenith building a does not exist.

Therefore, when the reflectors 4 and 104 using the sunlight reflecting structure according to the present invention are fixedly installed, not only perfect retroreflective light but also effective non-retroreflective light (emitted in an angle region with a zenith). Considering the reflected light), a sufficiently large effect can be obtained.
The exit angle of the non-retroreflected light in the ground coordinates varies depending on the position of the sun, which changes depending on the season and time, and the shape and installation angle of the reflectors 4 and 104. It is desirable that the exit region (angle region) having a high directivity probability of non-retroreflected light be directed to the vicinity of the zenith by appropriate settings. Thus, when the shape and installation angle of the reflectors 4 and 104 are set, it is possible not only to reduce the influence of reflected light on neighboring buildings but also to return more reflected light to the universe.

  Therefore, by adopting the reflectors 4 and 104, it is possible to suppress global warming and suppress the heat island phenomenon in urban areas without increasing the cost burden for installation.

  Here, the case where the reflecting materials 4 and 104 are installed on the roof of the building 2 has been described as an example, but the reflecting materials 4 and 104 can also be installed on the ground surface or the wall surface.

  In addition, by setting the shape and installation angle of the reflectors 4 and 104 so that the exit area with a high directivity probability of non-retroreflected light is directed to the vicinity of the zenith, many reflections obtained by adding non-retroreflective light to retroreflected light We explained that light can be returned to the universe, but the exit area (angle area) with high directivity probability of non-retro-reflected light is a specific use area on the ground, for example, a light window for a building, a prism, etc. You may make it set the shape and installation angle of the reflectors 4 and 104 so that it may face the condensing equipment etc. which were utilized. In this case, not only the influence of the reflected light on the neighboring building is reduced, but also a lot of non-retroreflected light can be effectively used for illumination in the building.

[Third embodiment]
FIG. 6 is a perspective view (A) of the reflecting plate 1 in which the reflecting material 4 (or the reflecting material 104. Hereinafter, the reflecting material 4 will be described as a representative example), and an exploded perspective view of the reflecting plate 1. It is the figure which described (B) together.

  In the third embodiment, a reflector 4 similar to the first embodiment is combined with an upper portion of a plate-like base member 3 having high rigidity to form a rectangular reflector 1. In the third embodiment, since the reflecting member 4 is joined to the base member 3 to form a highly rigid plate-like structure, stability at the time of installation is improved and transportation by an operator is facilitated. In consideration of transportation by the operator, the reflecting plate 1 is preferably a plate having a side of about 30 to 60 cm. As the shape of the reflecting plate 1, a rectangular shape is adopted here as an example, but other shapes such as a trapezoidal shape and a circular shape can be adopted according to the needs of the installation location. Moreover, in this example, although the reflective material 4 similar to 1st Embodiment is integrated in the reflecting plate 1, it is also possible to incorporate the reflective material 104 similar to 2nd Embodiment.

[Fourth Embodiment]
FIG. 7 is a cross-sectional view showing the fourth embodiment.

  In the reflection plate 201 of this embodiment, the reflection material 4 (reflection function part) is coupled to the upper portion of the base member 3 as in the third embodiment, but in addition to this, the front surface side of the reflection material 4 is arranged. A transparent coating layer 5 such as glass or transparent resin is provided so as to cover it. The reflection plate 201 is installed obliquely through the gantry 19.

  In the case of the reflecting plate 201, direct adhesion of dirt on the upper surface of the reflecting material 4 can be prevented by the transparent coating layer 5. Further, since the reflection plate 201 is installed obliquely, dirt and the like deposited on the transparent coating layer 5 can be efficiently washed away by rainwater or the like.

  FIG. 8 shows the reflector 201 installed on the roof of the building 2 obliquely via the mount 19. In this case, the reflecting plate 201 is desirably installed with an inclination angle of 15 ° to 30 ° southward with respect to the horizontal plane in consideration of the environment around the installation location and the annual solar altitude.

  When the reflecting plate 201 is installed in an inclined manner as described above, the reflection efficiency of sunlight can be increased, and dirt can be easily washed away by rainwater. In addition, when the reflector 201 is installed via the mount 19 as in this embodiment, not only can the reflector 201 be inclined at a set angle, but also the reflector 201 can be stably prevented from being blown by wind or the like. Can be installed. The inclination angle of the reflector 201 is preferably 1/100 or more when the emphasis is on drainage such as rainwater, and when the emphasis is on the reflection efficiency of sunlight, It is desirable to set the inclination angle from 15 ° to 30 °.

  The gantry 19 that supports the reflecting plate 201 is not limited to the shape and structure shown in the drawing, and various types can be adopted depending on the strength, the surrounding installation environment, and the like. Further, the reflecting plate 201 may be placed flat on the roof of a building to reduce the laying cost.

[Fifth Embodiment]
FIG. 9 is a plan view of the reflecting surfaces 406a, 406b, and 406c of the reflecting member 404 showing the fifth embodiment.
In the fifth embodiment, a reflective material 404 is formed by combining triangular reflective surfaces 406a, 406b, and 406c orthogonal to each other, and the photocatalytic layer 10 is provided on the front side of the reflective surfaces 406a, 406b, and 406c. Is provided.
The reflective surfaces 406a, 406b, and 406c on the reflective material 404 are formed continuously, and a drainage hole 17 that is a drainage function unit is provided at the lowest connected top of these reflective surfaces 406a, 406b, and 406c.

  In the fifth embodiment, since the photocatalyst layer 10 is directly provided on the front side of the reflecting surfaces 406a, 406b, and 406c, the dirt adhering to the photocatalyst layer 10 is decomposed by the decomposition action by the photocatalyst, and the dirt is further removed. The photocatalyst can be washed away with rainwater and the like by the hydrophilic action. And rainwater etc. can be discharged | emitted outside through the drainage hole 17 (drainage function part) provided in the connection top part of the lowest side of reflective surface 406a, 406b, 406c. Therefore, in the fifth embodiment, the front surfaces of the reflecting surfaces 406a, 406b, and 406c can be always kept clear without requiring special maintenance. In particular, the reflector 404 is based on the premise that the surface is always exposed to sunlight, so that the above action of the photocatalyst can be exhibited to the maximum.

[Sixth Embodiment]
FIG. 10 is a plan view showing the reflecting surfaces 506a, 506b, and 506c of the reflecting material 504. FIG.
In the sixth embodiment, similarly to the fifth embodiment, the reflective surfaces 506a, 506b, and 506c that are orthogonal to each other are combined to form the reflective material 504, and the front surfaces of the reflective surfaces 506a, 506b, and 506c are formed. The photocatalyst layer 10 is provided on the side, and a gap 18 (drainage function part) for drainage is provided between the reflection surfaces 506a, 506b, and 506c.

  Also in the case of the sixth embodiment, dirt adhered to the front side of the photocatalyst layer 10 is naturally washed away by the action of the photocatalyst layer 10 provided directly on the front face of the reflecting surfaces 506a, 506b, and 506c. It can be discharged to the outside through the drainage gap 18 together with rainwater or the like. Therefore, also in the case of the sixth embodiment, the front surfaces of the reflecting surfaces 506a, 506b, and 506c can always be maintained in a clear state without requiring special maintenance.

In the fifth and sixth embodiments described above, the drainage gap 18 is provided between the reflective tops 406a, 406b, and 406c provided with the drain holes 17 and the reflective surfaces 506a, 506b, and 506c. However, the shape and structure are not limited to those shown in the drawings as long as they can provide a drainage function on the reflecting surface, and various other modes can be adopted. is there.
The basic structure of the reflecting surface can be the same as that of the second embodiment.

[Seventh Embodiment]
FIG. 11 is a partially broken perspective view showing a state in which the reflector 4 adopting the sunlight reflecting structure according to the present invention is installed on the roof 20 (outside) of a building or the like.
In the seventh embodiment, the basic structure of the reflector 4 (reflecting function part) is the same as that of the first embodiment and the second embodiment, but heat insulation such as an air layer and a heat insulator is provided on the back of the reflector 4. The difference is that the layer 21 is provided. The reflective material 4 is fixed to the floor 20 by a frame portion 22 in the form of interposing a heat insulating layer 21 between the reflective material 4 and the rooftop floor 20. In the case of this example, a transparent coating layer 5 is provided on the front side of the reflector 4.

In the case of the seventh embodiment, the reflective material 4 installed on the roof 20 of the roof exhibits a basic function by retroreflection on the front side, and at the same time, in the summer, the reflective material 4 and the heat insulating layer 21 cooperate. By working, the transmission of heat from the outside to the room is surely suppressed. Therefore, it is possible to suppress energy consumption for cooling and heat dissipation from the air conditioner by suppressing the temperature rise in the room in summer. Further, in winter, since the outdoor cold air can be reliably suppressed by the reflector 4 and the heat insulating layer 21, energy consumption for heating can be suppressed.
Therefore, when this embodiment is adopted, energy consumption in summer and winter can be suppressed, and therefore, it is possible to contribute to further suppression of global warming by reducing the generation of CO2.

  In the seventh embodiment, the solar light reflecting structure according to the present invention is applied to the roof 20 of a building or the like, but it can also be applied to an outer wall or the like of a building.

  The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example in which a so-called corner cube reflector is configured by a mirror or an aluminum plate has been described. Is also possible. Moreover, it is also possible to use a transparent sphere such as a glass bead having a reflective layer at the bottom instead of the above corner cube reflector.

The 1st Embodiment of this invention is shown, and the top view (A) of the reflective material which comprises a sunlight reflective structure, and the top view (B) which shows a mode that this reflective surface continues were described collectively. Figure. Sectional drawing of the reflecting material which shows the same embodiment. The 2nd Embodiment of this invention is shown, The top view (A) which shows the reflective surface of the reflecting material which comprises a sunlight reflective structure, and the top view (B) which shows a mode that this reflective surface continues The figure described together. The perspective view which shows the example of installation to the roof of the building of 1st, 2nd embodiment. A figure looking up at the zenith from the ground. The figure which shows the 3rd Embodiment of this invention, and combined the perspective view (A) of the reflecting plate incorporating the reflecting material, and the figure which described the exploded perspective view (B) of the reflecting plate collectively. Sectional drawing which shows the 4th Embodiment of this invention. The perspective view which shows the example of installation to the roof of the building of the embodiment. The top view of the reflective surface of the reflecting material which shows the 5th Embodiment of this invention. The top view of the reflective surface of the reflecting material which shows the 6th Embodiment of this invention. The partially broken perspective view which shows the 7th Embodiment of this invention.

Explanation of symbols

4,104,404,504 ... Reflecting material (reflection function part)
5 ... Transparent coating layer 6a, 6b, 6c, 406a, 406b, 406c, 506a, 506b, 506c ... Reflecting surface 10 ... Photocatalyst layer 17 ... Drain hole (drainage function part)
18 ... Gap (drainage function part)
20 ... Floor (outside the building)
21 ... heat insulation layer

Claims (2)

In the solar reflection structure for global warming and heat island suppression with a reflection function part that reflects sunlight that reaches the ground,
The reflection function unit is provided with a retroreflective structure that reflects incident light in its incident direction ,
The retroreflective structure is constituted by a reflective surface unit composed of a plurality of reflective surfaces that are adjacent to each other so that incident light is reflected in the same direction as the incident direction,
The shape and installation angle of the reflection function part is set so that the emission area with a high directivity probability of non-retroreflected light faces the vicinity of the zenith,
While providing a transparent coating layer on the front surface of the reflective function portion, providing a heat insulating layer on the back, and attaching to the outside of the building through this heat insulating layer,
A drainage function part is provided at the connecting top part of the reflection surface,
A sunlight reflecting structure, wherein a photocatalyst layer is provided on the front side of the reflecting surface .   A facility using the solar light reflecting structure according to claim 1.

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