Buildings

Abstract

To provide a building that collects heat caused by sunlight while restraining a decrease in an amount of solar radiation and unevenness of solar radiation.SOLUTION: A building 1 comprises at least one structural member 80A. The structural member 80A comprises: a structural member body 10 formed by extrusion or casting of metal, comprising a light receiving surface 10a to be irradiated with sunlight, and having a hollow part 20 extending toward a second end part 16 from a first end part 15 formed therein; a pair of lid parts 40A and 40B arranged on the first end part 15 and the second end part 16, respectively, and closing the hollow part 20; an inflow port 42 provided in one of the pair of lid parts 40A and 40B, and allowing a heat medium to flow into the hollow part 20; and an outflow port 43 provided in one of the pair of lid parts 40A and 40B, and allowing the heat medium to flow out of the hollow part 20.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to buildings. [Background technology]

[0002] There is known a structure in which a heat collecting member is installed that stores heat obtained from sunlight in a heat medium. Patent Document 1 discloses an agricultural greenhouse in which a heat collecting member is installed. During the day, the heat medium is heated by irradiating the heat collecting member with sunlight, and circulates in the agricultural greenhouse at night, and the heat medium is used for agricultural purposes. business Warm the air inside the house. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-122271 Summary of the Invention [Problem to be solved by the invention]

[0004] In the agricultural greenhouse disclosed in Patent Document 1, the panel-type heat collecting member is placed in the upper space inside the agricultural greenhouse, which causes a decrease and unevenness in the amount of sunlight inside the agricultural greenhouse. This decrease and unevenness in the amount of sunlight can suppress photosynthesis of crops grown in the agricultural greenhouse, which may affect the growth and yield of the crops.

[0005] The present invention provides a structure that collects heat from sunlight while suppressing an increase in the area of ​​shadows that cause a decrease in the amount of solar radiation and unevenness within an agricultural greenhouse. [Means for solving the problem]

[0006] The present invention provides a building comprising at least one structural member, the structural member being formed by metal extrusion or casting, and having a light-receiving surface onto which sunlight is irradiated; a structural member body having a hollow portion formed therein extending from a first end toward a second end; a pair of lid portions disposed at the first end and the second end, respectively, and closing the hollow portion; an inlet provided in one of the pair of lid portions through which a heat transfer medium flows into the hollow portion; and an outlet provided in one of the pair of lid portions through which the heat transfer medium flows out of the hollow portion.

[0007] According to the building structure of the present invention, sunlight irradiated onto the light-receiving surface of the structural member body is converted into heat in the structural member body, and the heat can be stored in a heat transfer medium. That is, heat can be collected from sunlight in the structural member. Here, a structural member refers to a component that is essential for constructing a building and maintaining that structure. For example, agricultural greenhouses are constructed to minimize components other than structural members and transparent sheets in order to ensure sufficient light inside the greenhouse. In other words, providing components other than structural members and transparent sheets in an agricultural greenhouse is undesirable because it reduces the amount of solar radiation. According to the present invention, because heat can be collected from sunlight in the structural member, it is possible to avoid the need to install additional heat collecting components, thereby suppressing the reduction in the amount of solar radiation inside the agricultural greenhouse.

[0008] The hollow portion may include a first flow path through which the heat medium flows from the first end toward the second end, and a second flow path arranged adjacent to the first flow path via a partition wall, through which the heat medium flows from the second end toward the first end.

[0009] According to the above configuration, since the hollow portion has two flow paths, the flow path through which the heat medium flows is longer, and the contact area between the structural member body and the heat medium can be increased, so that the heat of the structural member body heated by sunlight can be efficiently transferred to the heat medium.

[0010] Each of the pair of lid portions may be provided with a connecting flow path that connects the first flow path and the second flow path so that the heat medium flows in a serpentine pattern from the inlet to the outlet.

[0011] According to the above configuration, the heat medium flows in a serpentine manner, so that a large contact area between the structural member body and the heat medium can be ensured. Furthermore, the time that the structural member body and the heat medium are in contact can be extended. Therefore, heat from sunlight can be efficiently stored in the heat medium. Furthermore, by processing the lid and providing a connecting flow path, a flow path in which the heat medium flows in a serpentine manner can be formed. Therefore, no processing is required to form a serpentine flow path in the structural member body, which can facilitate the manufacturing of the structural member body.

[0012] The partition wall may be provided with a fluid passage hole that connects the first flow path and the second flow path so that the heat medium flows in a serpentine manner from the inlet to the outlet.

[0013] According to the above configuration, the heat medium flows in a serpentine manner, so that a large contact area between the structural member body and the heat medium can be ensured. Furthermore, the time that the structural member body and the heat medium are in contact can be extended. Therefore, heat from sunlight can be efficiently stored in the heat medium. Furthermore, by processing the structural member body and providing a liquid passage hole, a flow path through which the heat medium flows in a serpentine manner can be formed. Therefore, no processing is required to form a serpentine flow path in the lid, which can facilitate the manufacture of the lid.

[0014] The hollow portion may include a plurality of first flow paths arranged adjacent to each other with partition walls interposed therebetween, through which the heat medium flows from the first end toward the second end.

[0015] According to the above configuration, the heat transfer medium flows in one direction through the plurality of first flow paths, so that the flow rate can be ensured.

[0016] Each of the pair of lid portions may be provided with a common flow path that communicates with each of the open ends of the plurality of first flow paths so that the heat transfer medium branches from the inlet to the plurality of first flow paths, merges from the plurality of first flow paths, and flows toward the outlet.

[0017] According to the above configuration, a structure that ensures a sufficient flow rate of the heat transfer medium can be easily realized by utilizing a plurality of first flow paths.

[0018] The structural member main body may have recesses provided at the first end and the second end to connect the ends of the plurality of first flow paths, and each of the pair of lid portions may be provided with an inlet / outlet flow path that connects the inlet or the outlet with the recess.

[0019] According to the above configuration, a structure that ensures a sufficient flow rate of the heat transfer medium can be easily realized by utilizing a plurality of first flow paths.

[0020] The structural member body may be provided with a rib along the direction in which the hollow portion extends.

[0021] According to the above-mentioned configuration, the provision of the ribs increases the contact area between the structural member body and the heat medium, so that heat from sunlight irradiated onto the structural member body and converted therein can be efficiently transferred to and stored in the heat medium.

[0022] The light receiving surface may be coated with a black film.

[0023] According to the above-described configuration, the emissivity of the light-receiving surface can be improved, and therefore the efficiency of heating the heat medium by sunlight can be improved.

[0024] A heat insulating material may be disposed on the outer surface of the structural member excluding the light receiving surface.

[0025] According to the above-mentioned configuration, it is possible to suppress or prevent the heat of the heated heat medium or structural member from being released into the atmosphere, thereby improving the heating efficiency of the heat medium.

[0026] The structural members may be vertically extending posts anchored to the ground.

[0027] According to the above configuration, the heating efficiency of the heat medium can be improved during times when the sun's altitude is low, such as at sunrise or sunset. During times when the sun's altitude is low, sunlight irradiates the pillar material at a small angle of incidence, so the amount of solar radiation can be large. As a result, the amount of heat the pillar material receives from sunlight also increases, and the heating efficiency of the heat medium can be improved.

[0028] The structural member may include a buried portion that extends beyond the ground and is buried in the ground.

[0029] According to the above-mentioned configuration, in addition to the heat from sunlight, geothermal heat can be used to heat the heat medium.

[0030] The structural members may be transversely extending beams.

[0031] According to the above configuration, the heating efficiency of the heat medium can be improved during the daytime when the sun is located in the south and the solar altitude is high. During the time when the solar altitude is high, sunlight irradiates the beams at a small angle of incidence, so the amount of solar radiation can be large. Therefore, the amount of heat received by the beams from sunlight also increases, and the heating efficiency of the heat medium can be improved.

[0032] The structural member may be a pair of gable beam members extending diagonally and connected to each other.

[0033] According to the above configuration, the heating efficiency of the heat medium can be improved during the daytime when the sun is located in the south and the solar altitude is high. During the time when the solar altitude is high, sunlight irradiates the gable beam material at a small angle of incidence, so the amount of solar radiation can be large. Therefore, the amount of heat received by the gable beam material from sunlight also increases, and the heating efficiency of the heat medium can be improved. [Effects of the Invention]

[0034] The structure of the present invention can collect heat from sunlight while suppressing an increase in the area of ​​shadows, which are a cause of a decrease in the amount of solar radiation and unevenness within the agricultural greenhouse. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a schematic view of an agricultural greenhouse according to a first embodiment of the present invention. [Figure 2] 1 is a schematic configuration diagram of an agricultural greenhouse according to a first embodiment of the present invention. [Figure 3] FIG. 2 is an exploded perspective view of a structural member according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 . [Figure 5] 4 is a cross-sectional view taken along line VV in FIG. 3; [Figure 6] FIG. 2 is a perspective view of a lid according to the first embodiment of the present invention. [Figure 7] FIG. 2 is a perspective view of a lid according to the first embodiment of the present invention. [Figure 8] FIG. 8 is a partial cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a partial cross-sectional view similar to FIG. 8. [Figure 10] FIG. 9 is a partial cross-sectional view similar to FIG. 8. [Figure 11] FIG. 4 is a diagram showing a modification of the first embodiment of the present invention. [Figure 12] 6 is a cross-sectional view similar to FIG. 5 of an agricultural greenhouse according to a second embodiment of the present invention. [Figure 13] 5 is a cross-sectional view similar to FIG. 4 of an agricultural greenhouse according to a third embodiment of the present invention. [Figure 14] 10 is a cross-sectional view similar to FIG. 4 of an agricultural greenhouse according to a fourth embodiment of the present invention. [Figure 15] FIG. 10 is a schematic configuration diagram of an agricultural greenhouse according to a fifth embodiment of the present invention. [Figure 16] 10 is a partial cross-sectional view similar to FIG. 8 of an agricultural greenhouse according to a fifth embodiment of the present invention. [Figure 17] 10 is a partial cross-sectional view similar to FIG. 5 of an agricultural greenhouse according to a sixth embodiment of the present invention. [Figure 18]10 is a perspective view of a lid portion of an agricultural greenhouse according to a sixth embodiment of the present invention, similar to FIG. 6. [Figure 19] 10 is a perspective view of a lid portion of an agricultural greenhouse according to a sixth embodiment of the present invention, similar to FIG. 7. [Figure 20] 10 is a partial cross-sectional view similar to FIG. 8 of an agricultural greenhouse according to a sixth embodiment of the present invention. [Figure 21] 10 is a partial cross-sectional view similar to FIG. 9 of an agricultural greenhouse according to a sixth embodiment of the present invention. [Figure 22] 11 is a partial cross-sectional view similar to FIG. 10 of an agricultural greenhouse according to a sixth embodiment of the present invention. [Figure 23] 13 is a partial cross-sectional view similar to FIG. 12 of an agricultural greenhouse according to a seventh embodiment of the present invention. [Figure 24A] 5 is a cross-sectional view of a structural member similar to FIG. 4 in a first modified example of the present invention. [Figure 24B] 5 is a cross-sectional view of a structural member similar to FIG. 4 in a second modified example of the present invention. [Figure 25A] 5 is a cross-sectional view of a structural member similar to FIG. 4 according to a third modified example of the present invention. [Figure 25B] 10 is a cross-sectional view of a structural member similar to FIG. 4 in a fourth modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0036] (First embodiment) Referring to Figure 1, the agricultural house (structure) 1 in this embodiment is a building installed so that the installation area is rectangular relative to the ground 2, and is equipped with pillars (structural members) 80A, 80B, a beam (structural member) 81, a pair of gable beams (structural members) 82A, 82B, and translucent vinyl sheets or glass panels (not shown) covering them.

[0037] In this embodiment, the pillars 80A, 80B, beam 81, and gable beams 82A, 82B are each essential components for maintaining the structure of the agricultural house 1, and have the rigidity to withstand the weight of the agricultural house 1 itself and external loads such as wind that are imposed on the agricultural house 1.

[0038] In this embodiment, the pillars 80A, 80B, beam 81, and gable beams 82A, 82B are each arranged so that a surface (light-receiving surface) 10a, which will be described later, faces the sun. Specifically, the pillars 80A, 80B, beam 81, and gable beams 82A, 82B are each arranged so that the surface 10a faces south. As will be described in detail later, by collecting solar heat on the surface 10a, the heat medium flowing inside the pillars 80A, 80B, beam 81, and gable beams 82A, 82B is heated.

[0039] In the following description, the short side direction of the agricultural house 1 parallel to the ground 2 is referred to as the X direction, the long side direction of the agricultural house 1 parallel to the ground 2 is referred to as the Y direction, and the height direction of the agricultural house 1 perpendicular to the ground 2 is referred to as the Z direction.

[0040] The agricultural greenhouse 1 is a building that is long in the Y direction in a plan view. The pillars 80A, 80B, the beams 81, and the gable beams 82A, 82B are each provided at a constant pitch in the Y direction and connected by connecting members 83 that extend in the Y direction.

[0041] The agricultural greenhouse 1 includes a cultivation space 64 and an upper space 65. The cultivation space 64 is a space below beams 81, and the upper space 65 is a space above beams 81.

[0042] 2, the agricultural greenhouse 1 includes a tank 58, a pump 59, a control unit 60, a three-way valve 62, and a radiator 61. In this embodiment, one set of the tank 58, the pump 59, the control unit 60, the three-way valve 62, and the radiator 61 is provided for one set of pillars 80A, 80B, beams 81, and gable beams 82A, 82B. One set of the tank 58, the pump 59, the control unit 60, the three-way valve 62, and the radiator 61 may be provided for the entire agricultural greenhouse 1.

[0043] Tank 58 is connected to pillar 80B via pipe 66a, to pump 59 via pipe 66b, and to radiator 61 via pipe 66c. Pump 59 is connected to three-way valve 62 via pipe 66d. Three-way valve 62 is connected to pillar 80A via pipe 66e, and to radiator 61 via pipe 66f.

[0044] The three-way valve 62 is controlled by the control unit 60, and switches the heat medium that has flowed in from the pipe 66d between the pipe 66e and the pipe 66f.

[0045] A heat transfer medium is stored in tank 58. The heat transfer medium is pressure-fed by pump 59 and sent to pillar 80A or radiator 61 via three-way valve 62. Specifically, the heat transfer medium is sent to pillar 80A, which is a heat collecting section, during the day, and to radiator 61 at night.

[0046] As will be described in detail later, the heat medium sent to the pillar 80A returns to the tank 58 via the beam 81, the gable beams 82A and 82B, and the pillar 80B. During this time, the heat medium is heated by sunlight. In addition, the heat medium sent to the radiator 61 returns to the tank 58 via the pipe 66c.

[0047] The heated heat medium flows through the radiator 61 and exchanges heat with the air inside the agricultural greenhouse 1. As a result, the air inside the agricultural greenhouse 1 is heated and the heat medium is cooled. The radiator 61 may be a known device that exchanges heat with the heat medium flowing inside, and may be, for example, a tube laid on the ground inside the agricultural greenhouse 1.

[0048] In this embodiment, the radiator 61 is disposed in the cultivation space 64. The cultivation space 64 and the upper space 65 may be separated by a curtain (not shown). The curtain prevents heat transfer between the cultivation space 64 and the upper space 65, improving the heat retention of the cultivation space 64.

[0049] The configuration of the pillar 80A will be described with reference to Fig. 3. In this embodiment, the pillars 80A and 80B, the beam 81, and the joint beams 82A and 82B each have the same configuration, and therefore descriptions of the configurations of the pillar 80B, the beam 81, and the joint beams 82A and 82B will be omitted.

[0050] The pillar 80A includes a pillar body (structural member body) 10 and a pair of lid portions 40A, 40B.

[0051] The pillar body 10 is a long member formed by metal extrusion or casting, and extends a given length from a first end 15 to a second end 16. In this embodiment, the pillar body 10 is formed from an aluminum alloy. The pillar body 10 may also be made of other metal materials, such as steel, aluminum, copper, copper alloy, or silver. It is more preferable that the thermal conductivity of the pillar body 10 is 200 w / m·K or higher.

[0052] 4, the pillar body 10 has a substantially rectangular cross section perpendicular to the extending direction, and includes a surface 10a, a surface 10b opposite to the surface 10a, and surfaces 10c and 10d connecting the surfaces 10a and 10b. As described above, in this embodiment, the surface 10a is irradiated with sunlight.

[0053] A hollow portion 20 and a cavity 11 are formed inside the pillar body 10. The hollow portion 20 and the cavity 11 each extend from a first end portion 15 to a second end portion 16, and are open at both ends.

[0054] 5, the hollow portion 20 includes two first flow paths 17A and 17C through which the heat transfer medium flows from the first end 15 to the second end 16, and one second flow path 17B through which the heat transfer medium flows from the second end 16 to the first end 15. The first flow path 17A and the second flow path 17B are arranged adjacent to each other with a partition wall 21A interposed therebetween, and the first flow path 17C and the second flow path 17B are arranged adjacent to each other with a partition wall 21B interposed therebetween. The first flow paths 17A and 17C and the second flow path 17B each extend parallel to the extension direction of the pillar body 10.

[0055] First flow path 17A is disposed on surface 10d side with respect to second flow path 17B. First flow path 17A has first opening 18A at first end 15 and second opening 19A at second end 16.

[0056] The second flow path 17B has a first opening 18B at the first end 15 and also has a second opening 19B at the second end 16.

[0057] First flow path 17C is disposed on the surface 10c side of second flow path 17B. First flow path 17C has first opening 18C at first end 15 and second opening 19C at second end 16.

[0058] 4, in this embodiment, the first flow paths 17A, 17C and the second flow path 17B are arranged on the surface 10a side of the cavity 11 and are spaced a distance L1 from the surface 10a. Each of the first flow paths 17A, 17C and the second flow path 17B is round in a cross section perpendicular to the extending direction of the pillar body 10 and has a constant cross-sectional area S.

[0059] The cavity 11 is arranged on the surface 10b side with respect to the first flow paths 17A, 17C and the second flow path 17B. In this embodiment, the heat transfer medium does not flow through the cavity 11, and the cavity 11 is provided to reduce the weight of the pillar body 10. Therefore, the shape, position, and size of the cavity 11 are set so as to reduce the weight of the pillar body 10 while ensuring the cross-sectional performance of the pillar body 10 in a cross section perpendicular to the extending direction of the pillar body 10. The cavity 11 does not have to be provided.

[0060] 3 and 5, a lid part 40A is fixed to the first end part 15 of the pillar body 10 so as to close the hollow part 20. In addition, a lid part 40B is fixed to the second end part 16 of the pillar body 10 so as to close the hollow part 20.

[0061] In this embodiment, the lids 40A, 40B are formed by cutting an aluminum alloy. The lids 40A, 40B may be made of other metal materials, such as steel, aluminum, copper, copper alloy, or silver. It is more preferable that the thermal conductivity of the lids 40A, 40B be 200 w / m K or higher.

[0062] 6, the cover 40A is a rectangular parallelepiped member having a top surface 47a, a bottom surface 47b opposite to the top surface 47a, and side surfaces 47c, 47d, 47e, and 47f connecting the top surface 47a and the bottom surface 47b. The top surface 47a faces the pillar body 10. The side surfaces 47c, 47d, 47e, and 47f extend flush with the surfaces 10a, 10b, 10c, and 10d of the pillar body 10, respectively.

[0063] The cover 40A has a hollow recess 41A and a solid base 44A. The recess 41A is provided to form an opening 49A in the top surface 47a. The base 44A is disposed on the bottom surface 47b side.

[0064] The side surface 47f is provided with an inlet 42 through which the heat medium flows into the first flow path 17A.

[0065] The shape of the opening 49A of the recess 41A is the same as the outer shape of the cross section perpendicular to the extending direction of the pillar body 10, i.e., a substantially rectangular shape. The first end 15 side of the pillar body 10 fits into the recess 41A, and the first end 15 is in close contact with the abutment surface 50A of the recess 41A. The lid 40A is fixed to the pillar body 10 by any fixing method such as welding.

[0066] A connecting flow path 45A is provided in the base portion 44A. The connecting flow path 45A is a U-shaped flow path having openings 51A and 51B at both ends. Opening 51A is aligned with the first opening 18C, and opening 51B is aligned with the first opening 18B. Therefore, the connecting flow path 45A connects the second flow path 17B and the first flow path 17C, and bends the flow direction of the heat medium by 180 degrees.

[0067] Further, the base portion 44A is provided with an inlet / outlet flow path 46A. The inlet / outlet flow path 46A is a flow path having openings 51C and 51D at both ends. The opening 51C is aligned with the first opening 18A, and the opening 51D is aligned with the inlet 42. Therefore, the inlet / outlet flow path 46A communicates between the first flow path 17A and the inlet 42.

[0068] 3, 5, and 7, the cover 40B is a rectangular parallelepiped member having a top surface 48a, a bottom surface 48b opposite the top surface 48a, and side surfaces 48c, 48d, 48e, and 48f connecting the top surface 48a and the bottom surface 48b. The top surface 48a faces the pillar body 10. The side surfaces 48c, 48d, 48e, and 48f extend flush with the surfaces 10a, 10b, 10d, and 10c of the pillar body 10, respectively.

[0069] The cover 40B has a hollow recess 41B and a solid base 44B. The recess 41B is provided to form an opening 49B in the top surface 48a. The base 44B is disposed on the bottom surface 48b side.

[0070] An outlet 43 through which the heat transfer medium flows out from the first flow path 17C is provided on the side surface 48f.

[0071] The shape of the opening 49B of the recess 41B is the same as the outer shape of the cross section perpendicular to the extending direction of the pillar body 10, i.e., a substantially rectangular shape. The second end 16 side of the pillar body 10 fits into the recess 41B, and the second end 16 is in close contact with the abutment surface 50B of the recess 41B. The lid 40B is fixed to the pillar body 10 by any fixing method such as welding.

[0072] A connecting flow path 45B is provided in the base portion 44B. The connecting flow path 45B is a U-shaped flow path having openings 52A and 52B at both ends. The opening 52A is aligned with the second opening 19A, and the opening 52B is aligned with the second opening 19B. Therefore, the connecting flow path 45B connects the first flow path 17A and the second flow path 17B, and bends the flow direction of the heat medium by 180 degrees.

[0073] Furthermore, the base portion 44B is provided with an inlet / outlet flow path 46B. The inlet / outlet flow path 46B is a flow path having openings 52C and 52D at both ends. The opening 52C is aligned with the second opening 19C, and the opening 52D is aligned with the outlet 43. Therefore, the inlet / outlet flow path 46B connects the first flow path 17C and the outlet 43.

[0074] 5, the heat medium that flows in through the inlet 42 flows into the first flow path 17A through the inlet / outlet flow path 46A of the lid 40A, flows through the first flow path 17A from the first end 15 to the second end 16, and flows into the second flow path 17B through the connecting flow path 45B of the lid 40B. The heat medium that flows into the second flow path 17B flows from the second end 16 to the first end 15 and flows into the first flow path 17C through the connecting flow path 45A of the lid 40A. The heat medium that flows into the first flow path 17C flows from the first end 15 to the second end 16 and flows out of the pillar 80A through the inlet / outlet flow path 46B and the outlet 53 of the lid 40B. That is, the heat transfer medium flows in a serpentine manner from the inlet 42 to the outlet 43 via the first flow paths 17A, 17C, the second flow path 17B, the connecting flow paths 45A, 45B, and the inlet / outlet flow paths 46A, 46B.

[0075] As described above, the pillar 80B, the beam 81, and the gable beams 82A and 82B each have the same configuration as the pillar 80A. That is, in each of the pillar 80B, the beam 81, and the gable beams 82A and 82B, the heat transfer medium that flows in from the inlet 42 flows in a serpentine manner toward the outlet 43.

[0076] 8 and 9, pillar 80A has lid 40A fixed to the ground 2 and extends in the Z direction (vertical direction). Pillar 80B has lid 40B fixed to the ground 2 and extends in the Z direction (vertical direction).

[0077] Beam 81 extends in the X direction (horizontal direction) to connect lid portion 40B of pillar 80A with lid portion 40A of pillar 80B. Lid portion 40A of beam 81 is fixed to lid portion 40B of pillar 80A, and lid portion 40B of beam 81 is fixed to lid portion 40A of pillar 80B by welding or the like.

[0078] The gable beam 82A extends diagonally upward from the lid portion 40B of the pillar 80A toward the center of the agricultural house 1. The gable beam 82B extends diagonally upward from the lid portion 40A of the pillar 80B toward the center of the agricultural house 1. The lid portion 40A of the gable beam 82A is fixed to the lid portion 40B of the pillar 80A and the lid portion 40A of the beam 81 by welding or the like. The lid portion 40B of the gable beam 82B is fixed to the lid portion 40A of the pillar 80B and the lid portion 40B of the beam 81 by welding or the like.

[0079] 10, the lid portion 40B of the joint beam 82A is connected to the lid portion 40A of the joint beam 82B. The lid portion 40B of the joint beam 82A is fixed to the lid portion 40A of the joint beam 82B by welding or the like.

[0080] In this embodiment, the tips of the cover portions 40A and 40B of the beam members 82A and 82B are inclined, so that the beam members 82A and 82B extend obliquely.

[0081] Referring to FIG. 2, the inlet 42 of the pillar 80A is connected to the three-way valve 62 via a pipe 66e.

[0082] The outlet 43 of the pillar 80A is connected to the inlet 42 of the beam 81 and the inlet 42 of the joint beam 82A via an external pipe 63a.

[0083] The outlet 43 of the joint beam member 82A is connected to the inlet 42 of the joint beam member 82B via an external pipe 63b.

[0084] The outlet 43 of the beam 81 and the outlet 43 of the joint beam 82B are each connected to the inlet 42 of the pillar 80B via an external pipe 63c.

[0085] The outlet 43 of the pillar 80B is connected to the tank 58 via a pipe 66a.

[0086] The flow of the heat transfer medium in the agricultural greenhouse 1 will be described with reference to FIG.

[0087] In the agricultural greenhouse 1 of this embodiment, a neutral to weakly alkaline heating medium is used to prevent the aluminum alloy from rusting. Specifically, a heating medium with a pH of 6 to 11 is used.

[0088] During the daytime, while sunlight is irradiating the agricultural greenhouse 1, the control unit 60 controls the three-way valve 62, and the heat medium flows in a circulating manner through the tank 58, the pillars 80A and 80B, the beam 81, and the gable beams 82A and 82B. Specifically, the heat medium is pumped by the pump 59 from the tank 58 toward the inlet 42 of the pillar 80A via the pipes 66b, 66d, and 66e and the three-way valve 62. The heat medium that flows into the pillar 80A flows in a serpentine pattern inside the pillar 80A and flows out from the outlet 43 of the pillar 80A. The heat medium that flows out from the pillar 80A flows into the beam 81 and the gable beam 82A via the external pipe 63a. The heat medium that flows into the beam 81 flows in a serpentine pattern inside the beam 81 and flows out from the outlet 43 of the beam 81. The heat medium that flows into the gable beam 82A flows in a serpentine pattern inside the gable beam 82A, flows out from the outlet 43 of the gable beam 82A, and flows into the gable beam 82B through the external piping 63b. The heat medium that flows into the gable beam 82B flows in a serpentine pattern inside the gable beam 82B and flows out from the outlet 43 of the gable beam 82B. The heat medium that flows out of the gable beam 82B merges with the heat medium that flows out of the beam 81 through the external piping 63c and flows into the column 80B. The heat medium that flows into the column 80B flows in a serpentine pattern inside the column 80B, flows out from the outlet 43 of the column 80B, and returns to the tank 58 through the piping 66a. During this time, the heat medium is heated by the columns 80A, 80B, the beam 81, and the gable beams 82A, 82B, and its temperature increases.

[0089] During the nighttime when the agricultural greenhouse 1 is not exposed to sunlight, the control unit 60 controls the three-way valve 62, and the heat medium stored in the tank 58 flows in a circulating manner through the radiator 61. Specifically, the heat medium is pressure-fed by a pump 59 from the tank 58 to the radiator 61 via pipes 66b, 66d, and 66f and the three-way valve 62. In the radiator 61, the heated heat medium exchanges heat with the air in the cultivation space 64, causing the temperature in the cultivation space 64 to rise. The heat medium cooled by the heat exchange in the radiator 61 returns to the tank 58 via the pipe 66c.

[0090] In the agricultural greenhouse 1 according to this embodiment, sunlight irradiated onto the surface 10a of the structural member main body 10 is converted into heat in the structural member main body 10, and the heat can be stored in a heat transfer medium. That is, sunlight can be collected by each of the pillars 80A, 80B, the beam 81, and the gable beams 82A, 82B. The agricultural greenhouse 1 is constructed to minimize components other than the structural members and transparent sheets in order to ensure sufficient light within the agricultural greenhouse 1. In other words, including components other than the structural members and transparent sheets in the agricultural greenhouse 1 is undesirable because it reduces or causes uneven solar radiation within the agricultural greenhouse. In this embodiment, sunlight can be collected by each of the pillars 80A, 80B, the beam 81, and the gable beams 82A, 82B, thereby eliminating the need to install additional heat collection components and suppressing the increase in the shadow area, which can cause reduced or uneven solar radiation within the agricultural greenhouse.

[0091] Furthermore, since hollow portion 20 is provided with first flow paths 17A, 17C and second flow path 17B, the flow path through which the heat medium flows becomes longer, and the area of ​​contact between structural member body 10 and the heat medium can be increased. Therefore, heat from structural member body 10 heated by sunlight can be efficiently transferred to the heat medium.

[0092] Furthermore, because the heat medium flows in a serpentine manner, a large contact area between the structural member body 10 and the heat medium can be ensured. Also, the time that the structural member body 10 and the heat medium are in contact can be extended. Therefore, heat from sunlight can be efficiently stored in the heat medium. Furthermore, by processing the lid portions 40A, 40B and providing the connecting flow paths 45A, 45B, a flow path through which the heat medium flows in a serpentine manner can be formed. Therefore, no processing is required to form a serpentine flow path in the structural member body 10, which can facilitate the manufacture of the structural member body 10.

[0093] Because the pillars 80A and 80B are provided, the heating efficiency of the heat medium can be improved during times when the sun's altitude is low, such as at sunrise and sunset. During times when the sun's altitude is low, sunlight irradiates the pillars 80A and 80B at a small angle of incidence, which can increase the amount of solar radiation. As a result, the amount of heat that the pillars 80A and 80B receive from the sunlight also increases, which can improve the heating efficiency of the heat medium. Here, the angle of incidence is the angle between the normal to the surface onto which sunlight is irradiated and the sun's rays.

[0094] Because the beams 81 are provided, the heating efficiency of the heat medium can be improved during the daytime when the sun is located in the south and the solar altitude is high. During the time when the solar altitude is high, sunlight irradiates the beams 81 at a small angle of incidence, so the amount of solar radiation can be large. Therefore, the amount of heat that the beams 81 receive from sunlight also increases, and the heating efficiency of the heat medium can be improved.

[0095] Because the gable beams 82A and 82B are provided, the heating efficiency of the heat medium can be improved during the daytime when the sun is located in the south and the solar altitude is high. During the time when the solar altitude is high, sunlight irradiates the gable beams 82A and 82B at a small angle of incidence, so the amount of solar radiation can be large. Therefore, the amount of heat that the gable beams 82A and 82B receive from sunlight also increases, and the heating efficiency of the heat medium can be improved.

[0096] The heat medium heated by sunlight exchanges heat in the radiator 61 and warms the air in the cultivation space 64, which reduces the inhibition of plant growth caused by temperature drops at night and can improve the growth rate of plants.

[0097] Referring to FIG. 11, according to a modified example of this embodiment, the agricultural greenhouse 1 is provided with a connecting lid portion 90. The connecting lid portion 90 is formed by integrally molding the lid portion 40B of the pillar 80A, the lid portion 40A of the beam 81, and the lid portion 40A of the gable beam 82A as a single component. In addition, instead of the external piping 63a (shown in FIG. 2), a lid portion flow path 91 is provided inside the connecting lid portion 90. The lid portion flow path 91 connects the second opening 19C of the pillar 80A to the first opening 18A of the beam 81 and the first opening 18A of the gable beam 82A. Since the external piping 63a is not provided, the agricultural greenhouse 1 can be easily assembled.

[0098] Furthermore, according to the modified example of this embodiment, the pillars 80A, the beams 81, and the gable beams 82A are each fixed to the connecting lid 90 with screws 92. This can make it easier to assemble the agricultural greenhouse 1.

[0099] (Second embodiment) 12, the configuration of the agricultural greenhouse 1 according to the second embodiment differs from that of the first embodiment in the following respects: The other configurations of the second embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0100] In the second embodiment, the lid portions 40A, 40B are not provided with connecting flow paths 45A, 45B (shown in FIG. 5), and the pillar body 10 is provided with liquid passage holes 22A, 22B.

[0101] Fluid passage hole 22A is provided on the first end 15 side of partition wall 21B that separates second flow path 17B and first flow path 17C, and connects second flow path 17B and first flow path 17C. Fluid passage hole 22B is provided on the second end 16 side of partition wall 21A that separates first flow path 17A and second flow path 17B, and connects first flow path 17A and second flow path 17B.

[0102] The heat transfer medium that flows into the pillar body 10 through the inlet 42 and the inlet / outlet flow path 46A flows through the first flow path 17A from the first end 15 to the second end 16 and then flows into the second flow path 17B through the liquid passage hole 22B. The heat transfer medium that flows into the second flow path 17B flows from the second end 16 to the first end 15 and then flows into the first flow path 17C through the liquid passage hole 22A. The heat transfer medium that flows into the first flow path 17C flows from the first end 15 to the second end 16 and then flows out of the pillar body 10 through the inlet / outlet flow path 46B and the outlet 43. In other words, the heat transfer medium flows in a serpentine pattern from the inlet 42 to the outlet 43 through the first flow paths 17A, 17C, the second flow path 17B, the liquid passage holes 22A, 22B, and the inlet / outlet flow paths 46A, 46B.

[0103] In the agricultural greenhouse 1 according to the second embodiment, the heat transfer medium flows in a serpentine manner, so a large contact area between the structural member body 10 and the heat transfer medium can be ensured. Furthermore, the time that the structural member body 10 and the heat transfer medium are in contact can be extended. Therefore, heat from sunlight can be efficiently stored in the heat transfer medium. Furthermore, by processing the structural member body 10 and providing fluid passage holes, a flow path through which the heat transfer medium flows in a serpentine manner can be formed. Therefore, no processing is required to form a serpentine flow path in the lid portions 40A, 40B, which can facilitate the manufacture of the lid portions 40A, 40B.

[0104] (Third embodiment) 13, the configuration of the agricultural greenhouse 1 according to the third embodiment differs from that of the first embodiment in the following respects: The other configurations of the third embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0105] The pillar body 10 is provided with ribs 30 that protrude toward the first flow path 17A. The ribs 30 extend from the first end 15 (shown in FIG. 3) to the second end 16 (shown in FIG. 3) along the extending direction of the pillar body 10. Similarly, the second flow path 17B and the first flow path 17C are each provided with ribs 30. The ribs 30 are molded integrally with the pillar body 10 by extrusion molding or casting.

[0106] According to the agricultural greenhouse 1 of the third embodiment, the provision of the ribs 30 increases the contact area between the structural member body 10 and the heat transfer medium. Therefore, heat from sunlight irradiated on and converted by the structural member body 10 can be efficiently transferred to and stored in the heat transfer medium. Furthermore, because the structural member body 10 is an extrusion molded or cast product, a structure having such ribs 30 can be easily formed.

[0107] (Fourth embodiment) 14, the configuration of the agricultural greenhouse 1 according to the fourth embodiment differs from that of the first embodiment in the following respects: The other configurations of the fourth embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0108] The surface 10a of the pillar body 10 is coated with a black coating 36. The black coating 36 is, for example, a high-emissivity coating made by electrolytically treating an aluminum alloy, and absorbs light of almost all wavelengths in sunlight.

[0109] Additionally, heat insulating materials 37A, 37B, and 37C are arranged on the outer surface 38 of the pillar body 10, excluding surface 10a. Heat insulating material 37A is arranged so as to contact surface 10b, and heat insulating material 37B is arranged so as to contact surface 10c. Furthermore, heat insulating material 37C is arranged so as to contact surface 10d.

[0110] Heat collection in the fourth embodiment Materials According to this, the emissivity of the surface 10a can be improved, and therefore the efficiency of heating the heat medium by sunlight can be improved.

[0111] Furthermore, since the heat insulating materials 37A to 37C are provided, it is possible to suppress or prevent the heat of the heated heat medium or the structural member body 10 from being released into the atmosphere, thereby improving the heating efficiency of the heat medium.

[0112] (Fifth embodiment) 15 and 16, the configuration of the agricultural greenhouse 1 according to the fifth embodiment differs from that of the first embodiment in the following respects: The other configurations of the fifth embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0113] 15, pillar 80A includes buried portion 12A that extends beyond the ground surface 2 and is buried in the ground 4. Pillar 80B also includes buried portion 12B that extends beyond the ground surface 2 and is buried in the ground 4. The length L2 of buried portions 12A and 12B is arbitrary, but is preferably 10 m or more.

[0114] Referring also to FIG. 16, the inlet 42 of the pillar 80A is not provided in the lid 40A, but is provided above the ground 2 of the pillar body 10. The lid 40A does not have an inlet / outlet flow path 46A (shown in FIG. 5). That is, the first opening 18A of the first flow path 17A is sealed by the lid 40A. Therefore, when the heat transfer medium circulates through the agricultural greenhouse 1, the heat transfer medium accumulates between the first end 15 and the inlet 42 of the first flow path 17A of the pillar 80A, and the heat transfer medium does not flow. The heat transfer medium that has flowed into the pillar 80A flows through the first flow path 17A from the inlet 42 toward the second end 16.

[0115] Although not shown, the pillar 80B has a similar configuration. That is, the heat medium accumulates in the first flow path 17C of the pillar 80B between the second end 16 and the outlet 43, and the heat medium does not flow. The heat medium that has flowed into the pillar 80B flows through the first flow path 17C from the first end 15 toward the outlet 43.

[0116] The agricultural greenhouse 1 according to the fifth embodiment can utilize heat from sunlight as well as geothermal heat obtained through the buried parts 12A and 12B as a heat medium. In particular, in winter, when the temperature of the ground is higher than the air temperature, the inside of the agricultural greenhouse 1 can be heated using geothermal heat.

[0117] (Sixth embodiment) 17 to 22, the configuration of the agricultural greenhouse 1 according to the sixth embodiment differs from that of the first embodiment in the following respects: The other configurations of the sixth embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0118] In the pillar 80A according to this embodiment, the pillar body 10 has the same structure as that of the first embodiment (see FIGS. 3 and 4), while the pair of lid portions 40A, 40B have a structure different from that of the first embodiment. Therefore, the flow path structure of the heat transfer medium inside the pillar 80A also differs from that of the first embodiment.

[0119] 18, a common flow path 45A and an inlet / outlet flow path 46A are provided in a base portion 44A of the cover portion 40A. The common flow path 45A is formed by a groove recessed from the abutment surface 50A of the recess portion 41A toward the bottom surface 47b. An opening 51D of the inlet / outlet flow path 46A is aligned with the inlet 42 as in the first embodiment, while an opening 51C is open to the common flow path 45A.

[0120] 19, the lid 40B is configured similarly to the lid 40A. A common flow path 45B and an inlet / outlet flow path 46B are provided in a base portion 44B of the lid 40B. The common flow path 45B is configured as a groove recessed from the abutment surface 50B of the recess 41B toward the bottom surface 48b. An opening 52D of the inlet / outlet flow path 46B is aligned with the outlet 43 as in the first embodiment, while an opening 52C is open to the common flow path 45B.

[0121] 17, the first end 15 of the pillar body 10 is fitted into the recess 41A of the lid portion 40A and abuts against the abutment surface 50A, and the second end 16 of the pillar body 10 is fitted into the recess 41B of the lid portion 40B and abuts against the abutment surface 50B. The hollow portion 20 of the pillar body 10 is formed by three elongated holes arranged adjacent to each other with partition walls 21A and 21B interposed therebetween. Each elongated hole has first openings 18D, 18E, and 18F that open at the first end 15 and second openings 19D, 19E, and 19F that open at the second end 16. The first openings 18D, 18E, and 18F all communicate with the common flow path 45A of the lid portion 40A. The second openings 19D, 19E, and 19F all communicate with the common flow path 45B of the lid portion 40B.

[0122] The heat transfer medium flowing in from the inlet 42 flows through the inlet and outlet flow paths of the cover 40A. 46 The heat transfer medium flows into the common flow path 45A through the common flow path 45A. 45 A flows into the three long holes via the three first openings 18D, 18E, 18F. The heat medium flows through each of the three long holes from the first end 15 toward the second end 16. That is, each of these long holes serves as a first flow path 17D, 17E, 17F that flows the heat medium from the first end 15 toward the second end 16. The heat medium in each of the first flow paths 17D, 17E, 17F flows through second openings 19D, 19E, 19F and joins in a common flow path 45B of the lid portion 40B. The heat medium flows from the common flow path 45B through inlet / outlet flow paths 46B to an outlet 43 Flows towards the outlet 43 It flows out from.

[0123] Unlike the first embodiment in which the heat transfer medium flows in a meandering manner, in this embodiment, the pillar 40 does not have a second flow path (for example, flow path 17B shown in FIG. 5) that allows the heat transfer medium to flow from the second end 16 where the outlet 43 is located to the first end 15 where the inlet 42 is located. 45 A plurality of first flow paths 17D, 17E, 17F are connected in parallel to 45A and 45B. The heat transfer medium is divided into these first flow paths 17D, 17E, 17F and flows in one direction from the first end 15 to the second end 16.

[0124] 20 to 22, the other structural members (beam 81 and gable beams 82A and 82B) are similar to the above. Beam 81 and gable beams 82A and 82B also have first flow paths 17D, 17E, and 17F through which the heat transfer medium flows in one direction from first end 15 to second end 16.

[0125] This embodiment also provides a building that collects heat from sunlight while suppressing the increase in the shadow area, which is a cause of reduced and uneven solar radiation within the agricultural greenhouse. Furthermore, by connecting multiple first flow paths in parallel and allowing the heat medium to flow in one direction, it is easy to ensure the flow rate of the heat medium. If the flow rate is increased, the heat medium can be used to lower the room temperature when the temperature inside the room rises excessively, and it can also be used as an auxiliary device for air conditioning equipment. Furthermore, the shorter retention time of the heat medium reduces the load on the pump 59.

[0126] (Seventh embodiment) 23, the configuration of the agricultural greenhouse 1 according to the seventh embodiment differs from that of the first embodiment in the following respects: The other configurations of the seventh embodiment are the same as those of the first embodiment, and the same reference numerals are used to designate elements that are the same as or similar to those of the first embodiment.

[0127] The difference between the sixth embodiment and the second embodiment is the same as the difference between the first embodiment and the second embodiment. In the present embodiment, the cover portions 40A and 40B are not provided with common flow paths 45A and 45B (see FIG. 17), and the pillar body 10 is provided with recesses 23A and 23B.

[0128] The recess 23A is recessed from the end face of the first end 15 toward the second end 16. First openings 18D, 18E, and 18F open to a bottom surface 24A of the recess 23A. All of the first flow paths 17D, 17E, and 17F communicate with the recess 23A on the first end 15 side. The recess 23B is recessed from the end face of the second end 16 toward the first end 15 side. Second openings 19D, 19E, and 19F open to a bottom surface 24B of the recess 23B. All of the first flow paths 17D, 17E, and 17F communicate with the recess 23B on the second end 16 side. The inflow / outflow flow path 46A of the lid 40A connects the inlet 42 with the recess 23A. The inflow / outflow flow path 46B of the lid 40B connects the recess 23B with the outlet 43.

[0129] In this embodiment, the recesses 23A and 23B perform the same function as the common flow paths 45A and 45B in the sixth embodiment. That is, the heat transfer medium flows from the inlet 42 into the recess 23A via the inlet / outlet flow path 46A, branches from the recess 23A into the plurality of first flow paths 17D, 17E, and 17F, flows through each of the first flow paths 17D, 17E, and 17F, joins at the recess 23B, and flows toward the outlet 43 via the inlet / outlet flow path 46. This provides the same effects as the sixth embodiment.

[0130] (Variation) In the above embodiment, the structural member body has a rectangular cross section, but the cross-sectional shape of the structural member body is not particularly limited. As shown in Figures 24A and 24B, the pillar body 10 may have a C-shaped or U-shaped cross section. As shown in Figures 25A and 25B, the pillar body 10 may have an H-shaped cross section. The material is not limited to aluminum alloy, but may be other metal materials such as steel, aluminum, copper, copper alloy, or silver. The bodies of other structural members (e.g., beams and gable beams) can also be modified in a similar manner.

[0131] 24A and 24B, the C-shaped pillar body 10 includes a web 10W and a pair of flanges 10F, 10F extending perpendicularly from both ends of the web 10W, and has an overall C-shaped cross section. A hollow portion 20 (plurality of elongated holes) is provided in at least one of the three portions of the web 10W and the pair of flanges 10F. As shown in FIG. 24A, hollow portions 20 may be provided in all three portions, or as shown in FIG. 24B, hollow portions 20 may be provided only in the web 10W. The number of elongated holes provided in each of the three portions is not particularly limited. In the case of a serpentine type as in the first embodiment, the total number of elongated holes may be an odd number of three or more. In the case of a one-way type as in the sixth embodiment, the total number of elongated holes may be plural.

[0132] 25A and 25B, the H-shaped pillar body 10 includes a web 10W and a pair of flanges 10F extending perpendicularly from both ends of the web 10W, and has an overall H-shaped cross section. The location of the hollow portion 20 and the number of slots that form the hollow portion 20 are the same as those of the C-shaped pillar body 10. As shown in Fig. 25B, the slots may be arranged in the thickness direction of the web 10W. [Explanation of symbols]

[0133] 1. Agricultural house (building) 2 ground 4 underground 10 Pillar body (structural member body) 10a surface (light receiving surface) 10b,10c,10d plane 11 Cavity 12A,12B Buried part 15 First end 16 Second end 17A, 17C First flow path 17B Second flow path 18A,18B,18C 1st opening 19A,19B,19C 2nd opening 20 Hollow part 21A,21B Bulkhead 22A,22B Liquid passage hole 30 Ribs 36 Black Film 37A, 37B, 37C Insulation material 40A,40B Lid 41A,41B depression 42 Inlet 43 Outlet 44A,44B Foundation part 45A, 45B connecting flow path 46A,46B Inflow / outflow channel 47a top surface 47b bottom 47c, 47d, 47e, 47f Side 48a Top 48b bottom 48c,48d,48e,48f Side 49A,49B opening 50A,50B Contact surface 51A, 51B, 51C, 51D opening 52A, 52B, 52C, 52D opening 58 Tank 59 Pump 60 Control Unit 61 Heat sink 62 Three-way valve 63a,63b,63c External piping 64 Cultivation space 65 Upper space 66a, 66b, 66c, 66d, 66e, 66f Piping 80A, 80B Pillar material (structural member) 81 Beams (structural members) 82A, 82B Gable beams (structural members) 83 Connecting member 90 Connection lid 91 Cover flow path 92 screws

Claims

1. at least one structural member; The structural member is at least one of a column member fixed to the ground and extending in a vertical direction, a beam member extending in a horizontal direction, and a pair of joint members extending in a diagonal direction and connected to each other, The structural member is a structural member body formed by extrusion molding of aluminum or an aluminum alloy, the structural member body having a light receiving surface on which sunlight is irradiated, the structural member body having a hollow portion formed therein and extending from a first end portion toward a second end portion; a pair of lid portions disposed at the first end and the second end, respectively, to close the hollow portion; an inlet provided in one of the pair of lid portions, through which the heat medium flows into the hollow portion; an outlet provided in one of the pair of lid portions, through which the heat medium flows out of the hollow portion; Equipped with The light receiving surface is coated with a black coating by electrolysis. building.

2. The hollow portion is a first flow path through which the heat medium flows from the first end toward the second end; a second flow path that is arranged adjacent to the first flow path via a partition wall, and through which the heat medium flows from the second end toward the first end; The structure of claim 1 , comprising:

3. Each of the pair of lid portions is provided with a connecting flow path that connects the first flow path and the second flow path so that the heat medium flows in a serpentine pattern from the inlet to the outlet. The structure of claim 2.

4. the structural member body has a fluid passage hole provided in the partition wall, the fluid passage hole connecting the first flow path and the second flow path so that the heat medium flows in a serpentine manner from the inlet to the outlet. The structure of claim 2.

5. The hollow portions include a plurality of first flow paths arranged adjacent to each other with partition walls interposed therebetween, through which the heat medium flows from the first end toward the second end. The structure of claim 1.

6. Each of the pair of lid portions is provided with a common flow path that communicates with each of the open ends of the plurality of first flow paths so that the heat medium branches from the inlet to the plurality of first flow paths, merges from the plurality of first flow paths, and flows toward the outlet. The structure of claim 5.

7. The structural member body has recesses provided at the first end and the second end, which connect the ends of the plurality of first flow paths to each other, and each of the pair of lid portions is provided with an inlet / outlet flow path which connects the inlet or the outlet with the recess. The structure of claim 5.

8. The building structure according to claim 1 , wherein the structural member body is provided with ribs along the direction in which the hollow portion extends.

9. The building according to claim 1 , wherein a heat insulating material is arranged on an outer surface of the structural member body excluding the light receiving surface.

10. The building structure according to claim 1 , wherein the structural members include the pillars, and the pillars extend beyond the ground and have embedded portions that are embedded in the ground.

Images