Wall greening system

Abstract

To provide a wall surface greening system that can store enough rainwater in a small space, can also use tap water or gray water as necessary, and can automatically irrigate.SOLUTION: A wall surface greening system 1 comprises: a water storage panel 20 which has planting panels 10 arranged along a wall surface and capable of holding plants, a water storage space 20a arranged between the planting panel 10 and the wall surface and capable of storing water, an upper opening 20b provided at an upper part of the water storage space 20a, and a lower opening 20c provided at a lower part of the water storage space 20a; an upper pipe 41 which is provided in communication with the upper opening 20b and into which rainwater flows; air ports 43, 44, 45, 46 which are provided in communication with the upper opening 20b and open to the outside; an external tank 70 which is provided in communication with the lower opening 20c; and an irrigation part which irrigates the planting panel 10 with water stored in the external tank 70.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a wall greening system that enables planting along the wall surface of a building.

Background Art

[0002] A plant cultivation device that enables planting along the wall surface of a building is described in Patent Document 1. As water supply sources in the plant cultivation device of Patent Document 1, tap water, precipitation, stored precipitation, or the water-based liquid drained from the plant cultivation device, circulation by a pump or the like of the water-based liquid drained from the plant cultivation device, or a combination thereof are exemplified. However, the specific configuration of the water supply system is not shown.

[0003] Further, Patent Document 2 discloses a technique of providing a water supply tank for supplying water for planting on the back side of a greening panel provided on a wall surface.

[0004] Furthermore, Patent Document 3 discloses a technique of automatically controlling the replenishment of rainwater, reclaimed water, or tap water in the irrigation of a three-dimensional garden laid on a multi-story building.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] When adopting the plant cultivation device of Patent Document 1, even if rainwater or tap water (city water) can be used, only the water retention body can hold water, and when the water retention body dries, it is necessary to supply water each time. In addition, in the configuration of Patent Document 2, although a certain amount of water can be retained by the water supply tank, when a large number of greening panels are provided, it is necessary to individually replenish the water in the water supply tank. Further, in the configuration of Patent Document 2, when trying to introduce rainwater, if the precipitation is large, there is a risk of water overflowing from the water supply tank, making it difficult to utilize rainwater. Furthermore, the configuration of Patent Document 3 does not correspond to wall greening. Also, in the configuration of Patent Document 3, in order to increase the amount of water that can be stored in the storage tank, it is necessary to increase the capacity of the storage tank and secure the space therefor. When the capacity of the storage tank cannot be increased, rainwater cannot be sufficiently utilized.

[0007] An object of the present disclosure is to provide a wall greening system that can sufficiently store rainwater in a small space, can also utilize tap water and reclaimed water as needed, and can automatically perform irrigation.

Means for Solving the Problems

[0008] The present disclosure solves the above problems by the following means. For ease of understanding, reference numerals corresponding to embodiments of the present disclosure are attached for explanation, but it is not limited thereto.

[0009] A first disclosure is, for example, as shown in FIGS. 1, 2, 4, etc., a planting panel (10) arranged along a wall surface and capable of holding plants, a water storage space (20a) arranged between the planting panel (10) and the wall surface and capable of storing water, an upper opening (20b) provided at the upper part of the water storage space (20a), a lower opening (20c) provided at the lower part of the water storage space (20a), a water storage panel (20) having the above, an upper pipe (41) provided in communication with the upper opening (20b) through which rainwater flows in, air vents (43, 44, 45, 46) provided in communication with the upper opening (20b) and open to the outside, an external tank (70) provided in communication with the lower opening (20c), and an irrigation unit (71, 74, 80, 81) for irrigating the planting panel (10) with the water stored in the external tank (70). It is a wall greening system (1).

[0010] The second disclosure is about the wall greening system (1) described in the first disclosure. For example, as shown in FIG. 1, at least the part constituting the water storage space (20a) of the water storage panel (20) is arranged within a range hidden from the planting panel (10) when the planting panel (10) is viewed from the front, and the planting panel (10) and the water storage panel (20) are arranged side by side in at least one of the vertical and horizontal directions. The wall greening system (1) is characterized by this.

[0011] The third disclosure is about the wall greening system (1) described in the first disclosure or the second disclosure. For example, as shown in FIGS. 1, 5, 6, etc., water can be supplied to the external tank (70) from the city water supply. The wall greening system (1) is characterized by this.

[0012] The fourth disclosure is about the wall greening system (1) described in any one of the first disclosure to the third disclosure. For example, as shown in FIGS. 1, 5, 6, etc., the irrigation parts (71, 74, 80, 81) include a pump (74) for pumping the water stored in the external tank (70), a control part (71) for controlling the operation of the pump (74), and a discharge part (81) for discharging the water sent from the external tank (70) by the pump (74) to the planting panel (10). The wall greening system (1) is characterized by this.

[0013] The fifth disclosure is about the wall greening system (1) described in any one of the first disclosure to the fourth disclosure. For example, as shown in FIGS. 1, 5, 6, etc., an adjustment part (42) for adjusting the amount of rainwater passing through is provided in the upper pipe (41). The wall greening system (1) is characterized by this.

[0014] The sixth disclosure is a wall greening system (1) described in any one of the first to fifth disclosures. For example, as shown in FIG. 7, at least one of the air inlets (43, 44, 45, 46) has a double-tube structure including a flow path through which rainwater passes and a flow path through which air passes. The wall greening system (1) is characterized by this.

Effect of the Invention

[0015] According to the present disclosure, it is possible to provide a wall greening system that can sufficiently store rainwater in a small space, can also utilize tap water or reclaimed water as needed, and can automatically perform irrigation.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0017] Hereinafter, the best mode for carrying out the present disclosure will be described with reference to the drawings and the like.

[0018] (Embodiment) FIG. 1 is a front view of the wall greening system 1 according to the present disclosure. FIG. 2 is a perspective view showing the main part of the wall greening system 1. Note that, including FIG. 1, each of the following figures is a schematic diagram, and the size and shape of each part are exaggerated or omitted as appropriate for easy understanding. Also, in the following description, specific numerical values, shapes, materials, etc. are shown for the description, but these can be changed as appropriate.

[0019] The wall greening system 1 of this embodiment includes a planting panel 10, a water storage panel 20, a vertical gutter 30, a water intake 31, an upper pipe 41, an adjustment part 42, air vents 43, 44, 45, 46, a lower pipe 51, an on-off valve 52, a city water pipe 61, a city water valve 62, an external tank 70, a control part 71, a moisture sensor 72, a water level sensor 73, a pump 74, an overflow pipe 75, an irrigation pipe 80, an irrigation tube 81, and a water collection gutter 90.

[0020] The planting panel 10 is arranged along the wall surface and is configured to be able to hold plants. The planting panel 10 is fixed to a base fitting (not shown) fixed to the building by anchor bolts or the like. The planting panel 10 is formed, for example, in a substantially square shape of 50×50 cm when viewed from the front, and is installed along the wall surface of the building by arranging a plurality of them in the vertical direction or the horizontal direction. In this embodiment, an example configuration in which the planting panels 10 are arranged in 4 rows in the vertical direction and 4 columns in the horizontal direction is illustrated, but the number of these arrangements can be appropriately changed according to the size of the wall surface to be installed. That is, a plurality of the planting panels 10 (and the water storage panel 20 described later) are arranged side by side in at least one of the vertical direction and the horizontal direction. Note that in FIGS. 1 and 2, the planting panel 10 is shown as a simplified rectangular parallelepiped shape, but in actuality, it has a structure for holding plants, a structure for holding moisture, etc.

[0021] FIG. 3 is an exploded perspective view of an example of the planting panel 10. The planting panel 10 can be configured to include, for example, a back panel 11, a plant holding panel 12, and a water retention material 13. The back panel 11 is provided on the back side of the planting panel 10 and has a configuration in which the plant holding panel 12 and the water retention material 13 can be attached. Further, the back panel 11 has a groove portion 11a in which the irrigation tube 81 described later is disposed. When water is irrigated into this groove portion 11a, the water is appropriately distributed to the water retention material 13 and the plants held by the plant holding panel 12. In the present embodiment, the planting panel 10 having the configuration shown in FIG. 3 is used. More specifically, as the planting panel 10, a commercially available panel for flowers manufactured by Yamazaki Sangyo Co., Ltd. is used. In addition, the plant cultivation device described in Japanese Patent Application Laid-Open No. 2013-66442 can also be used as the planting panel 10. Further, the planting panel 10 is not limited to the above-exemplified ones, and may have a simpler form, and known planting panels (greening panels) can be appropriately used.

[0022] FIG. 4 is a perspective view showing a state in which a part of the planting panel 10 is removed from the perspective view of FIG. 2. In FIG. 4, a part of the water storage panel 20 is cut to show the water storage space 20a. FIG. 5 is a front view showing a state in which the planting panel 10 and the moisture sensor 72 are removed from the front view of FIG. 1. FIG. 6 is a cross-sectional view showing a pipeline through which water and air pass inside the water storage panel 20 and the like. The water storage panel 20 is disposed between the planting panel 10 and a wall surface of a building (not shown) and is fixed to a base metal fitting (not shown) in the same manner as the planting panel 10. By fixing the planting panel 10 and the water storage panel 20 to the same base metal fitting, the workability and productivity can be improved.

[0023] The water storage panel 20 has a water storage space 20a capable of storing water, an upper opening 20b provided at the upper part of the water storage space 20a, and a lower opening 20c provided at the lower part of the water storage space 20a, and can be manufactured, for example, as a resin molded product. The upper opening 20b and the lower opening 20c are provided so as to protrude in a cylindrical shape. At the part where the water storage panels 20 are arranged side by side in the vertical direction, as shown in FIG. 4 and FIG. 7 described later, the upper opening 20b and the lower opening 20c are connected. In each figure, for ease of understanding, the upper opening 20b and the lower opening 20c are shown as a figure simply butted and connected. However, the actual part where the upper opening 20b and the lower opening 20c are connected is connected using a sealing material, an adhesive, etc. so that water and air do not leak. The same applies to the connection parts of other pipelines and the like.

[0024] The part constituting the water storage space 20a of the water storage panel 20 has a substantially octagonal shape when viewed from the front, and this part is arranged in a range hidden by the planting panel 10 in the state where the planting panel 10 is viewed from the front, and only the pipe-shaped parts of the upper opening 20b and the lower opening 20c of the planting panel 10 are visible from the front. Here, the "hidden range" includes not only the case where it cannot be seen at all when viewed from the side of the planting panel 10, but also the case where the water storage panel 20 is visually difficult to perceive substantially. The shape of the water storage panel 20 is not particularly limited as long as the water storage panel 20 can be made difficult to be perceived in the viewing field for observing the planting panel 10, and examples include a square shape, a polygonal shape, a circular shape, and an elliptical shape. Further, in order to make it difficult for an air pocket to be generated in the upper part of the water storage panel 20, the cross-sectional area of the water storage panel 20 may be gradually narrowed upward.

[0025] In the present embodiment, the water storage panel 20 is arranged on the back side of each planting panel 10. Therefore, the combination of the planting panel 10 and the water storage panel 20 is arranged in 4 rows in the vertical direction and 4 columns in the horizontal direction. However, it is not limited to this form, and for example, the water storage panel 20 may be provided on the back side of a part of the planting panel 10.

[0026] The vertical downspout 30 extends along a substantially vertical direction and is a cylindrical rain gutter through which rainwater collected from the roof or the like of a building flows downward from above. The rainwater flowing down the vertical downspout 30 connected below the water intake 31 is directly discharged into a public sewer. The water intake 31 is provided in the middle of the vertical downspout 30 and flows the rainwater flowing down the vertical downspout 30 into the upper pipe 41. As the water intake 31, generally commercially available products can be used as appropriate. For rainwater up to a predetermined amount, the water intake 31 flows it into the upper pipe 41. However, when rainwater exceeding the predetermined amount flows into the water intake 31, the excess amount of rainwater is flowed into the vertical downspout 30 connected below. In addition, the water intake 31 is provided with a filter for removing fallen leaves, dust, and the like.

[0027] The upper pipe 41 is arranged to communicate the upper opening 20b of the water storage panel 20 arranged in the uppermost row with the water intake 31 and is a pipe for transmitting rainwater from the water intake 31 to the water storage panel 20. In the present embodiment, as shown in FIGS. 1 and 5, the upper pipe 41 is connected only to two rows close to the water intake 31 and is not connected to the two rows far from the water intake 31. Note that the upper pipe 41 may be connected to all rows, or may be connected only to the row closest to the water intake 31, and can be appropriately changed according to the assumed rainfall amount, the diameter of the pipe, the water storage capacity of the water storage panel 20, and the like.

[0028] The adjustment part 42 is provided at a position in the middle of the upper pipe 41, between the water intake 31 and the upper opening 20b. The adjustment part 42 can adjust the amount of rainwater passing through. Therefore, rainwater up to the amount adjusted by the adjustment part 42 can flow through the upper pipe 41, and rainwater exceeding the adjusted amount flows into the vertical gutter 30 connected below the water intake 31. By providing the adjustment part 42, the inflow amount of rainwater can be appropriately adjusted, and the balance between the amount of air discharged per unit time from the external tank 70 and the water storage panel and the inflow amount of rainwater can be achieved. Thus, it is possible to prevent the situation where the inflow amount of rainwater is too small and water storage does not progress, or the situation where the amount of air discharged cannot catch up with the inflow amount of rainwater and rainwater overflows from the air vents 43, 44, 45, 46, etc., and the water storage process can be optimized. Note that when the pipe configuration has a pre-established balance between the amount of air discharged and the inflow amount of rainwater, the adjustment part 42 may be omitted.

[0029] The air vents 43, 44, 45, 46 are provided in communication with the upper opening 20b and are open to the outside. The air vents 43, 44 communicate with the upper opening 20b via the upper pipe 41. Also, the air vents 45, 46 are directly attached to the upper opening 20b. The air vents 43, 44, 45, 46 are provided to discharge air when storing rainwater in the water storage panel 20. Note that in FIG. 5, for simplicity, only a form that simply opens upward is illustrated. For these air vents 43, 44, 45, 46, according to the local conditions of the installation location, a filter or a mosquito net can be provided at the opening of the air vent so that insects and dust do not enter the water storage panel 20 from the air vent. Also, a shade can be provided so that sunlight does not directly enter the interior, or an L-shaped (bent 90 degrees) connecting pipe can be attached to the tip of the upper opening 20b to prevent the growth of moss, etc.

[0030] The lower pipe 51 is arranged to communicate the lower opening 20c of the water storage panel 20 arranged at the lowermost stage with the external tank 70, and is a pipe for conveying the rainwater that has passed through the water storage panel 20 to the external tank 70. A shut-off valve 52 is provided at a position of the lower pipe 51 close to the external tank 70.

[0031] The on-off valve 52 is a valve whose opening and closing are controlled by the control unit 71 and which can open and close the flow path of rainwater flowing into the external tank 70.

[0032] The city water supply pipe 61 is a water pipe to which city water (tap water) is supplied. The city water valve 62 is a valve whose opening and closing are controlled by the control unit 71 and which can open and close the flow path of tap water flowing into the external tank 70.

[0033] The external tank 70 is provided in communication with the lower opening 20c via the lower pipe 51. The location where the external tank 70 is arranged is installed at a position where it can receive the rainwater flowing from the lower opening 20c. Further, an overflow pipe 75 is connected to the upper part of the external tank 70, and the rainwater accumulated in the external tank 70 above the specified amount flows into the vertical drain 30.

[0034] The control unit 71 comprehensively controls the introduction of rainwater and city water and the irrigation in the wall greening system 1. In this embodiment, the control unit 71 exemplifies a form in which the control of water in the wall greening system 1 is collectively performed. However, for example, the control of the introduction of rainwater and city water into the external tank 70 and the irrigation control may be configured to be controlled by separate control units. As the control unit 71, a dedicated product of the wall greening system 1 equipped with a dedicated control circuit may be used, a general-purpose control device may be used, or a general-purpose computer, tablet terminal, or the like may be used.

[0035] The moisture sensor 72 is arranged in the planting panel 10 and is a sensor that detects the ratio (water content rate) of moisture in the planting panel 10 and sends the detection result of the moisture to the control unit 71. Although the figure exemplifies an example in which the moisture sensor 72 is installed at only one location, the moisture sensor 72 may be provided at a plurality of locations.

[0036] The water level sensor 73 is arranged in the external tank 70, detects the water level in the external tank 70, and sends the detection result of the water level to the control unit 71.

[0037] The pump 74 is controlled in operation by the control unit 71, and when driven, pumps the water in the external tank 70 and sends it out to the irrigation pipe 80.

[0038] One end of the overflow pipe 75 is connected above the external tank 70 and the other end is connected to the downspout 30 in order to promote the flow-down of water due to gravity. It is desirable that the external tank 70 side of the overflow pipe 75 is arranged higher than the downspout 30 side.

[0039] The irrigation pipe 80 is an irrigation pipe that connects the pump 74 and the irrigation tube 81. The irrigation tube (discharge part) 81 is arranged in the groove part 11a provided at the upper end of the planting panel 10. One end of the irrigation tube (discharge part) 81 is connected to the irrigation pipe 80, the other end is closed, and a discharge port (not shown) for discharging an appropriate amount of water is provided at an intermediate part. The irrigation tube 81 may be constituted by a hose, a pipe, etc. having only holes opened on the side surface, but it is desirable to use one that is called a drip hose, a drip tube, an irrigation hose, etc. and is commercially available and can perform water spraying little by little from the water discharge holes. By using a drip hose or the like, it is possible to always perform stable water volume irrigation regardless of whether it is the base side or the tip side of the irrigation tube 81. The control unit 71, the pump 74, the irrigation pipe 80, and the irrigation tube 81 described above constitute an irrigation unit for irrigating the water stored in the external tank 70 to the planting panel 10.

[0040] The water collecting gutter 90 is arranged below the planting panel 10, collects the surplus water irrigated to the planting panel 10, and returns it into the external tank 70 via the water collecting pipe 91. In the present embodiment, the water collecting gutter 90 is provided below the planting panel 10 at the lowermost stage, but it is not limited to this, and the water collecting gutter 90 may be provided below each stage of the planting panel 10 or below the planting panel 10 at the selected stage.

[0041] Next, the supply of rainwater and tap water and the irrigation in the wall greening system 1 of the present embodiment will be described in more detail. First, as an order, the explanation will start from the case where the amount of stored water in the external tank 70 is sufficient enough to overflow from the overflow pipe 75 as shown in FIG. 6. At this time, the on-off valve 52 is in a closed state under the control of the control unit 71. When there is rainfall with the on-off valve 52 closed, rainwater is taken in from the water intake device 31 and sent to the upper pipe 41. The rainwater passing through the upper pipe 41 flows downward, and when the lower pipe 51 is filled with rainwater, the water storage panels 20 arranged in the lower part are gradually filled with water in order. At this time, the air in the water storage panels 20 is discharged from the air ports 43, 44, 45, and 46, and does not prevent the storage of rainwater. When all the water storage panels 20 are filled with rainwater, since the upper pipe 41 is also filled with rainwater, further rainwater cannot flow into the upper pipe 41, and the rainwater is drained from the water intake device 31 to the lower vertical gutter 30 below.

[0042] When the amount of moisture in the planting panel 10 decreases, the amount of moisture detected by the moisture sensor 72 becomes a low value. When the detection result of the moisture amount by the moisture sensor 72 becomes equal to or lower than a predetermined value, the control unit 71 operates the pump 74, and the water stored in the external tank 70 is sent to the irrigation tube 81 through the irrigation pipe 80, and irrigation of the planting panel 10 is carried out.

[0043] When it is obtained from the detection result of the water level sensor 73 that the water level in the external tank 70 has dropped below a predetermined water level (referred to as a predetermined water level 1) due to irrigation, the control unit 71 opens the on-off valve 52 to introduce the rainwater stored in the water storage panel 20 into the external tank 70. Then, when it is obtained from the detection result of the water level sensor 73 that the amount of stored water in the external tank 70 has reached a predetermined water level (referred to as a predetermined water level 2) before overflowing from the overflow pipe 75, the control unit 71 closes the on-off valve 52. As a result, the introduction of the rainwater stored in the water storage panel 20 into the external tank 70 stops.

[0044] In addition, when sunny days continue or the like, even if the on-off valve 52 is opened, water is not supplied from the water storage panel 20. When the water level sensor 73 detects that the water level in the external tank 70 has dropped to a water level (predetermined water level 3) lower than the predetermined water level 1, the control unit 71 opens the city water valve 62 to introduce city water into the external tank 70. In this case, when it is obtained from the detection result of the water level sensor 73 that the water level in the external tank 70 has reached the predetermined water level 1, the control unit 71 closes the city water valve 62. Note that it is desirable that the predetermined water level 3 is set to a water level in a state where there is almost no water in the external tank 70. By setting the predetermined water level 3 as described above, the supply of city water is performed only when the amount of water in the external tank 70 is absolutely insufficient. The supply of city water is limited to the necessary range, and the rainwater stored in both the external tank 70 and the water storage panel 20 can be utilized to the maximum extent.

[0045] According to the wall greening system 1 of the present embodiment, since a plurality of relatively small planting panels 10 and water storage panels 20 are installed, as long as there is a location on the structure system to be constructed that is substantially perpendicular to the area, they can be installed with a high degree of freedom without design restrictions. In addition, since the water storage panel 20 is installed using a substantially vertical space, the external tank 70 can be made smaller than in the prior art, and the degree of freedom in determining the installation location of the external tank 70 can be increased. Further, since the water storage panel 20 is arranged along the wall surface, a large amount of water can be stored without occupying a new location. And regardless of the form of the building or indoor space, planting and water supply means can be installed with a high degree of freedom.

[0046] Generally, when the water storage tank is enlarged to increase the water storage capacity, it becomes a large-scale device so that the tank is not damaged by water pressure. However, in the wall greening system 1 of the present embodiment, by arranging a plurality of water storage panels 20 with a size similar to that of the planting panel 10, the water storage capacity can be increased with a simple configuration. In the wall greening system 1 of this embodiment, rainwater is stored in the water storage panel 20 and the external tank 70 and used for irrigation. Therefore, from the perspective of natural resource utilization, rainwater can be used as the water supply source for irrigation, and stable water supply for planting can also be achieved even during droughts when rainfall stops. In addition, the shapes of the planting panel 10 and the water storage panel 20 when viewed from the front are substantially similar, and since the water storage panel 20 is located on the back side of the planting panel 10, the water storage panel 20 is hardly perceived within the viewing field for observing the planting panel 10, without harming the landscape, and can be made elegant in design.

[0047] Since a configuration is adopted in which a plurality of planting panels 10 and water storage panels 20 are provided independently, even when a planting panel 10 or a water storage panel 20 is damaged or fails, the function can be restored only by repairing or replacing that planting panel 10 or water storage panel 20, and maintenance can be easily performed. Also, when maintaining the planting panel 10 or the water storage panel 20, usually an operator checks using an aerial work platform or the like. However, the water storage panel 20 and the pipeline system can be maintained in accordance with the maintenance of the vegetation of the planting panel 10, or the planting panel 10 can be maintained in accordance with the maintenance of the water storage panel 20 and the pipeline system. Therefore, maintenance can be carried out appropriately and efficiently. Furthermore, since the wall greening system 1 of this embodiment does not embed the pipeline of the water supply and drainage system inside the wall surface of a building or the like, even when a failure such as water leakage occurs in the pipeline, there is no adverse effect on the inside of the building structure, and maintenance work such as renovation is also easy. In this way, the wall greening system 1 of this embodiment can be easily installed and maintained, and the cost of operating the wall greening system 1, including the installation cost, can be reduced.

[0048] The wall greening system 1 of this embodiment systematically separates the external tank 70 and the planting panel 10, enabling the supply of an optimal amount of water from the external tank 70 to the planting panel 10 at all times. As a result, rainwater can be stored without having adverse effects such as excessive growth or root rot on the growth of the plants, the water supply to the plants can be optimized, and the growth state of the plants growing on the planting panel 10 can be appropriately managed.

[0049] In the wall greening system 1 of this embodiment, surplus water in irrigation is collected from the catch gutter 90 and returned to the external tank 70, so that water is not wasted and rainwater can be maximally utilized for irrigation. As a result, the amount of tap water used for irrigation can be reduced, contributing to the protection of the global environment. And, since the wall greening system 1 of this embodiment stores rainwater in the external tank 70 and the planting panel 10 during rainfall, the amount of rainwater flowing out of the site can be reduced, and the outflow of rainwater during heavy rain can be delayed. As a result, it can contribute to reducing urban flooding damage.

[0050] (Variant form) Without being limited to the embodiment described above, various modifications and changes are possible, and these are also within the scope of this disclosure.

[0051] (Variant form 1) In the embodiment, an example of a form in which the rainwater flow path through which rainwater flows and the air flow path through which air escapes have the functions of both the upper opening 20b and the lower opening 20c was illustrated. However, it is not limited to this. For example, the rainwater flow path and the air flow path may be separately configured. FIG. 7 is a cross-sectional view illustrating an example in which the rainwater flow path and the air flow path are separately configured. In FIG. 7, only the concept of the arrangement of the air pipes 21 is shown by lines, and the cross-sectional width, shape, etc. are not shown. In the example shown in FIG. 7, an air pipe 21 is added to the configuration of the embodiment shown above. The air pipe 21 constitutes a flow path through which the air above the inside of each water storage space 20a can be discharged from the air ports 43 to 46 through the upper opening 20b and the lower opening 20c. The air pipe 21 may be constituted by, for example, a flexible hollow tube, or may be constituted by a piping member made of resin or the like. By providing the air pipe 21 to separate the rainwater flow path and the air flow path, air can be reliably discharged even when the inflow of rainwater is large. In the example of FIG. 7, the air pipe 21 is illustrated as having a double pipe structure passing through the upper opening 20b and the lower opening 20c, but the rainwater flow path and the air flow path may be arranged at completely different positions.

[0052] (Modification 2) In the embodiment, an example has been described in which the control unit 71 controls whether to perform irrigation based on the detection result of the moisture sensor 72. However, it is not limited to this. For example, the control unit 71 may control irrigation by timer control to perform irrigation at a determined time. Further, the control unit 71 may control irrigation by combining the control by the moisture sensor 72 and the timer control.

[0053] (Modification 3) In the embodiment, an example has been described in which the introduction of tap water is also automatically performed by the control unit 71. However, it is not limited to this. For example, the introduction of tap water may be performed manually. Further, not limited to only tap water, reclaimed intermediate water may be made introducible into the external tank 70.

[0054] (Modification 4) In the embodiment, when the high temperature in summer continues, the water stored in the water storage panel 20 may become an inappropriate high temperature (for example, 40°C or higher) as the water supplied to the planting panel 10. In this case, while appropriately guiding the water in the water storage panel 20 to the external tank 70, tap water that usually does not become excessively high in temperature is added to adjust the temperature of the water supplied to the planting panel 10 to an appropriate temperature.

[0055] (Modification 5) In the embodiment, when a large amount of rainfall such as a typhoon is assumed, a drain valve (not shown) provided in the external tank 70 is opened to empty both the external tank 70 and the water storage panel 20, maximizing the amount of water that can be stored and reducing the drainage load on the public sewer, which may be performed as necessary.

[0056] Note that the embodiments and the modified forms can be used in appropriate combination, but detailed description thereof will be omitted. Further, the present disclosure is not limited by the respective embodiments described above.

Explanation of Signs

[0057] 1 Wall greening system 10 Planting panel 11 Back panel 11a Groove part 12 Plant holding panel 13 Water retention material 20 Water storage panel 20a Water storage space 20b Upper opening 20c Lower opening 21 Air pipe 30 Vertical gutter 31 Water intake device 41 Upper pipe 42 Adjusting part 43 Air port 44 Air port 45 Air port 46 Air port 51 Lower pipe 52 On-off valve 61 Service water pipe 62 Service water valve 70 External tank 71 Control unit 72 Moisture sensor 73 Water level sensor 74 Pump 75 Overflow pipe 80 Irrigation pipe 81 Irrigation tube 90 Catch water gutter 91 Catch water pipe

Claims

1. A planting panel arranged along a wall surface and capable of holding plants, A water storage panel arranged between the planting panel and the wall surface, having a water storage space capable of storing water, an upper opening provided at the upper part of the water storage space, and a lower opening provided at the lower part of the water storage space, An upper pipe provided in communication with the upper opening through which rainwater flows in, An air vent provided in communication with the upper opening and open to the outside, An external tank provided in communication with the lower opening, An irrigation section for irrigating the planting panel with the water stored in the external tank, Comprising, The water storage panel is arranged separately from the planting panel, and the water stored in the water storage space is irrigated to the planting panel only through the external tank. A wall greening system.

2. In the wall greening system according to Claim 1, At least a part of the water storage panel constituting the water storage space is arranged in a range hidden by the planting panel when the planting panel is viewed from the front, The planting panel and the water storage panel are arranged side by side in at least one of the vertical direction and the horizontal direction, A wall greening system characterized by the above.

3. In the wall greening system according to Claim 1 or Claim 2, The external tank can be supplied with water from tap water, A wall greening system characterized by the above.

4. In the wall greening system according to Claim 1 or Claim 2, The irrigation section, A pump for pumping the water stored in the external tank, A control section for controlling the operation of the pump, Comprising a discharge section for discharging the water sent from the external tank by the pump to the planting panel, A wall greening system characterized by the above.

5. In the wall greening system according to Claim 1 or Claim 2, The upper pipe is provided with an adjustment section for adjusting the amount of rainwater passing through, A wall greening system characterized by the above.

6. In the wall greening system according to Claim 1 or Claim 2, At least one of the air vents has a double pipe structure having a flow path through which rainwater passes and a flow path through which air passes, A wall greening system characterized by the above.

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