JP2023027745A - Heat collection member and agricultural house - Google Patents

Abstract

To provide a heat collection member having a simplified structure.SOLUTION: A heat collection member 1 comprises: a main body part 10 formed with a hollow part 20 extending toward a second end part 16 from a first end part 15, that is a metal extruded article having a light receiving surface 11c to be irradiated with sunlight; a pair of lid parts 50A and 50B arranged on the first end part 15 and the second end part 16, respectively, and closing the hollow part 20; an inflow port 52 provided in one of the pair of lid parts 50A and 50B, and allowing a heat medium to flow into the hollow part 20; and an outflow port 53 provided in one of the pair of lid parts 50A and 50B, and allowing the heat medium to flow out of the hollow part 20.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a heat collecting member and an agricultural house having the same.

A heat collecting member that stores heat obtained from sunlight in a heat medium is known. The heat collecting member is installed, for example, in an agricultural house. A heat collecting member installed in an agricultural house is used in such a way that it stores heat during the day and uses the heat to warm the air in the agricultural house at night.

Patent Literature 1 discloses a heat collecting member including a hollow frame having a transparent layer, a heat collecting portion inserted and fixed into the frame and having a flow path, and a heat insulating layer.

JP 2012-242016 A

The heat collecting member disclosed in Patent Document 1 has a large number of components and a complicated structure. Therefore, the manufacturing process becomes complicated, and there is a possibility that the manufacturing man-hours increase. Further, when the density of the solar energy irradiating the heat collecting surface decreases during cloudy weather or in winter, there is a possibility that the heat transfer amount of the fluid flowing in the fluid flow path may be insufficient.

An object of the present invention is to provide a heat collecting member with a simplified structure and an agricultural house including the same.

A first form of the present invention is a main body portion which is a metal extrusion formed with a hollow portion extending from a first end portion toward a second end portion and having a light-receiving surface irradiated with sunlight; a pair of lid portions respectively arranged at the first end portion and the second end portion to close the hollow portion; A heat collecting member is provided, comprising an inlet and an outlet provided in one of the pair of lids, through which the heat medium flows out from the hollow.

According to the heat collecting member of the present invention, the sunlight irradiated to the main body made of metal is converted into heat and stored in the heat medium. In addition, the heat collecting member is composed only of an extruded main body, a lid closing a hollow portion of the main body, an inlet, and an outlet, and the number of parts constituting the heat collecting member is small. Therefore, the structure can be simplified. Therefore, the manufacturing process is also simplified, and the manufacturing man-hours can be shortened. Furthermore, since the main body is molded by extrusion, the length of the main body can be easily changed.

The hollow portion is arranged so as to be adjacent to a first flow path through which the heat medium flows from the first end toward the second end, and the first flow path via a partition wall. A second flow path through which the heat medium flows from the end portion toward the first end portion may be provided.

According to the above configuration, since the hollow portion has two channels, the channel through which the heat medium flows becomes longer, and the contact area between the main body and the heat medium can be increased. Therefore, the heat of the main body heated by sunlight can be efficiently transferred to the heat medium.

The partition wall may be provided with a liquid passage hole that connects the first flow path and the second flow path so that the heat medium meanders and flows from the inflow port toward the outflow port. good.

According to the above configuration, since the heat medium flows meanderingly, it is possible to ensure a large contact area between the main body and the heat medium, and the contact time can be lengthened. Therefore, heat from sunlight can be efficiently stored in the heat medium. Further, by processing the body portion and providing the liquid passage holes, a flow path through which the heat medium flows meanderingly can be formed. Therefore, the lid does not need to be processed to form a meandering flow path, and the lid can be easily manufactured.

Each of the pair of lids is provided with a connection flow path connecting the first flow path and the second flow path so that the heat transfer medium meanders from the inlet to the outlet. may be provided.

According to the above configuration, since the heat medium flows meanderingly, it is possible to ensure a large contact area between the main body and the heat medium, and the contact time can be lengthened. Therefore, heat from sunlight can be efficiently stored in the heat medium. Further, by processing the lid portion to provide a connection channel, a channel in which the heat medium flows meanderingly can be formed. Therefore, the main body can be easily manufactured without processing for forming the meandering flow path in the main body.

A channel cross-sectional area of the first channel aligned with the inlet may be smaller than a channel cross-sectional area of the second channel.

According to the above configuration, the pressure loss of the heat medium occurs in the first flow path aligned with the inlet, so the flow velocity of the heat medium is reduced, and the time during which the heat medium is in contact with the main body is extended. Therefore, the heating efficiency of the heat medium can be improved.

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

According to the above configuration, since the heat medium flows in one direction through the plurality of first flow paths, the flow rate can be ensured.

The structural member main body has recesses provided at the first end portion and the second end portion for communicating the ends of the plurality of first flow paths, and each of the pair of lid portions includes: An inflow/outflow channel may be provided for communicating the inflow port or the outflow port with the recess.

According to the above configuration, it is possible to easily realize a structure that secures the flow rate of the heat medium using the plurality of first flow paths.

In each of the pair of lids, the heat transfer medium is branched from the inlet to the plurality of first flow paths, joined from the plurality of first flow paths, and flows toward the outlet. , a common channel communicating with each of the opening ends of the plurality of first channels may be provided.

According to the above configuration, it is possible to easily realize a structure that secures the flow rate of the heat medium using the plurality of first flow paths.

The heat collecting member may further include a supporting portion that supports the body portion so that an angle thereof can be adjusted.

According to the above configuration, the angle of the main body can be adjusted so that the light-receiving surface is irradiated with sunlight through the support.

The main body is formed in a panel shape, and the main body is provided on the surface side of the panel shape and is provided on the back side of the panel shape. and a reflective portion that reflects the irradiated sunlight, and the support portion is positioned between a heat collecting position where the heat collecting portion faces upward and a light shielding position where the reflective portion faces upward. You may support the said main-body part so that an angle of is adjustable.

According to the above configuration, the heat collector and the reflector are selectively directed upward to receive sunlight. The angle adjusting function of the supporting portion enables switching between a state in which the heat collecting portion collects heat from sunlight and a state in which the reflecting portion reflects the sunlight.

The heat collecting portion may include a covering portion that covers the surface of the main body portion, and fins that protrude from the covering portion.

According to the above configuration, since the heat collector has fins, the area for receiving sunlight is increased. This improves the heat collecting effect.

The heat collecting portion may be painted black.

According to the above configuration, it is possible to provide the heat collecting portion with a heat collecting function by a simple method.

The body portion may be made of an aluminum alloy, and the reflecting portion may be configured by making the back surface side solid.

According to the above configuration, it is possible to impart a light shielding function to the reflecting portion by a simple method.

The body portion may have a stepped structure in a cross section perpendicular to the extending direction.

According to the above configuration, the stepped structure increases the area irradiated with sunlight, so that the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density.

The body portion may have a curved portion in a cross section perpendicular to the extending direction.

According to the above configuration, since the area irradiated with sunlight increases in the curved portion, the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density.

A first rib may be provided in the hollow portion along a direction in which the hollow portion extends.

According to the above configuration, since the first rib is provided, the contact area between the main body and the heat medium is increased. Therefore, the heat generated by the sunlight irradiated and converted to the main body can be efficiently transferred to the heat medium and stored. That is, it can cope with the decrease in solar energy density. Also, since the main body is an extruded product, the first rib can be easily molded.

A first recess may be provided in the hollow portion along a direction in which the hollow portion extends.

According to the above configuration, the provision of the first concave portion increases the contact area between the main body portion and the heat medium. Therefore, the heat generated by the sunlight irradiated and converted to the main body can be efficiently transferred to the heat medium and stored. That is, it can cope with the decrease in solar energy density. Moreover, since the main body is an extruded product, the first concave portion can be easily formed.

A second rib may be provided on the light receiving surface along a direction in which the main body extends.

According to the above configuration, the provision of the second rib can increase the area of the main body that is irradiated with sunlight. That is, the heat medium can be heated by the sunlight irradiated on the second rib in addition to the sunlight irradiated on the light receiving surface. Therefore, the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density. Also, since the main body is an extruded product, the second ribs can be easily molded.

A second concave portion may be provided on the light receiving surface along the direction in which the main body portion extends.

According to the above configuration, the provision of the second concave portion can increase the area of the main body portion irradiated with sunlight. That is, the heat medium can be heated by the sunlight irradiated to the second concave portion in addition to the sunlight irradiated to the light receiving surface. Therefore, the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density. Moreover, since the main body is an extruded product, the second recess can be easily formed.

A black film may be coated on the light receiving surface.

According to the above configuration, the emissivity of the light-receiving surface can be improved, so that the heating efficiency of the heat medium by sunlight can be improved.

A heat insulating material may be arranged on the outer surface of the main body portion excluding the light receiving surface.

According to the above configuration, it is possible to suppress or prevent the heated heat medium or the heat of the main body from being released to the atmosphere or the like. Therefore, the heating efficiency of the heat medium can be improved.

The main body includes a plate-shaped upper wall, a plate-shaped lower wall arranged to face the upper wall, and a pair of side walls connecting an end of the upper wall and an end of the lower wall. and may be provided.

The upper wall may be provided with a flange portion protruding from the upper wall beyond the pair of side walls, and the upper surface of the upper wall and the flange portion facing the sun may be the light receiving surface.

According to the above configuration, the sunlight receiving area can be increased, and the heating efficiency of the heat medium can be improved.

A thickness of the partition wall may be thicker than thicknesses of the upper wall, the lower wall and the side walls.

According to the above configuration, heat exchange between the adjacent first flow path and second flow path can be suppressed. Therefore, for example, when comparing the temperatures of the heat medium flowing through the first flow path and the temperature of the heat medium flowing through the second flow path, if the temperature of the heat medium flowing through the second flow path is high, the heat flowing through the second flow path The heat of the medium can be suppressed from being transferred to the heat medium flowing through the first flow path, and a high heat medium temperature can be maintained in the second flow path.

A second aspect of the present invention provides an agricultural house comprising one or more heat collecting members described above.

Each of the heat collecting members includes a main body formed in a panel shape and supported by a structural member of the house so that the angle can be adjusted. a heat collecting part that collects heat from the sunlight, and a reflecting part that is provided on the back side of the panel shape and reflects the irradiated sunlight, and the house is the structural member of the plurality of heat collecting members A rotating mechanism for synchronously changing the angle with respect to the may be provided.

According to the heat collecting member according to the present invention and the agricultural house provided with the same, the structure can be simplified.

1 is a perspective view of a heat collecting member according to a first embodiment of the present invention; FIG. The perspective view which looked at the main-body part in 1st Embodiment of this invention from the 1st end part side. FIG. 3 is an enlarged view of portion III of FIG. 2; The perspective view which looked at the main-body part in 1st Embodiment of this invention from the 2nd end part side. FIG. 5 is an enlarged view of portion V of FIG. 4; FIG. 3 is a cross-sectional view taken along line VI-VI of FIG. 2; The perspective view of the cover part in 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram of the agricultural house which has arrange|positioned the heat collecting member in 1st Embodiment of this invention. The side view of the installation structure of the heat collecting member in 1st Embodiment of this invention. The rear view of the installation structure of the heat collecting member in 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the agricultural greenhouse which has arrange|positioned the heat collecting member in 1st Embodiment of this invention. FIG. 9 is a cross-sectional view of a variant taken along line XII-XII in FIG. 8; The perspective view similar to FIG. 2 of the main-body part in 2nd Embodiment of this invention. The perspective view of the cover part in 2nd Embodiment of this invention. Sectional drawing similar to FIG. 6 in 3rd Embodiment of this invention. Sectional drawing similar to FIG. 6 in 4th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 5th Embodiment of this invention. Sectional drawing similar to FIG. 6 in the modification of 5th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 6th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 7th Embodiment of this invention. Sectional drawing similar to FIG. 6 in the modification of 7th Embodiment of this invention. Sectional drawing similar to FIG. 6 in the modification of 7th Embodiment of this invention. Sectional drawing similar to FIG. 6 in the modification of 7th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 8th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 9th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 10th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 11th Embodiment of this invention. Sectional drawing similar to FIG. 6 in the modification of 11th Embodiment of this invention. Sectional drawing similar to FIG. 6 in 12th Embodiment of this invention. FIG. 21 is an exploded perspective view of a heat collecting member according to a thirteenth embodiment of the present invention; Sectional drawing of the heat collection member in 13th Embodiment of this invention. Sectional drawing of the heat collection member in 14th Embodiment of this invention. FIG. 9 is a schematic diagram similar to FIG. 8 in a fifteenth embodiment of the present invention; The side view of the heat collection member in 15th Embodiment of this invention. FIG. 20 is a schematic diagram of a rotation mechanism according to a fifteenth embodiment of the present invention; FIG. 21 is a schematic diagram showing a state in which a heat collecting member is positioned at a heat collecting position according to a fifteenth embodiment of the present invention; FIG. 20 is a schematic diagram showing a state in which a heat collecting member is positioned at a light shielding position according to a fifteenth embodiment of the present invention;

(First embodiment)
Referring to FIG. 1, the heat collecting member 1 according to this embodiment includes a main body portion 10 and a pair of lid portions 50A and 50B.

Referring to FIGS. 2 and 4, the main body 10 is a panel-like member formed by extrusion molding of metal and forming a long rectangular parallelepiped. In this embodiment, body portion 10 is extruded to extend from first end 15 to second end 16 .

In this embodiment, the body portion 10 is made of an aluminum alloy. It is preferable that the thermal conductivity of the body portion 10 is 200 w/m·K or more. The body portion 10 may be made of aluminum, copper, a copper alloy, silver, or the like.

Referring also to FIG. 6, the main body 10 includes a flat plate-shaped upper wall 11, a flat plate-shaped lower wall 12 arranged to face the upper wall 11, and ends of the upper wall 11 and the lower wall 12. and extending in the extending direction. Further, the body portion 10 includes partition walls 14A, 14B, 14C, 14D, 14E, and 14F that connect the upper wall 11 and the lower wall 12 inside the body portion 10 and extend along the extending direction of the body portion 10 . The partition walls 14A to 14F are spaced apart from each other. In this embodiment, the separation distance d between the partition walls 14A to 14F is constant.

In the following description, the direction from the first end 15 to the second end 16 is the X-axis direction, the direction from the side wall 13A to the side wall 13B is the Y-axis direction, and the direction perpendicular to these is the Z-axis direction.

The body portion 10 has a hollow portion 20 with both ends opened.

The hollow portion 20 extends in the X-axis direction inside the body portion 10, and has four first flow paths 17A, 17C, 17E, and 17G through which the heat medium flows from the first end portion 15 toward the second end portion 16. Prepare. Further, the hollow portion 20 extends in the X-axis direction inside the main body portion 10, and has three second flow paths 17B, 17D, and 17F through which the heat medium flows from the second end portion 16 toward the first end portion 15. Prepare. In the present embodiment, the first flow path 17A is a substantially rectangular space extending in the X-axis direction defined by the upper wall 11, the lower wall 12, the side wall 13A, and the partition wall 14A in the cross section perpendicular to the X-axis direction. . Like first flow path 17A, first flow paths 17C, 17E, 17G and second flow paths 17B, 17D, 17F are defined by upper wall 11, lower wall 12, partition walls 14A-14F, and side wall 13B. space. In other words, the partition walls 14A to 14F are provided so as to separate the first flow paths 17A, 17C, 17E and 17G from the second flow paths 17B, 17D and 17F.

Referring to FIG. 3, a liquid passage hole 22B is provided on the first end 15 side of the partition 14B. Similarly, liquid passage holes 22D and 22F are provided on the first end portion 15 side of the partition walls 14D and 14F. The second flow path 17B and the first flow path 17C communicate with each other through the liquid passage holes 22B. The second flow path 17D and the first flow path 17E communicate with each other through the liquid passage hole 22D. The second flow path 17F and the first flow path 17G communicate with each other through the liquid passage holes 22F.

Referring to FIG. 5, a liquid passage hole 22A is provided on the second end 16 side of the partition 14A. Similarly, liquid passage holes 22C and 22E are provided on the second end portion 16 side of the partition walls 14C and 14E. The first flow path 17A and the second flow path 17B communicate with each other through the liquid passage hole 22A. 17 C of 1st flow paths and 17 D of 2nd flow paths are connected through 22 C of liquid communication holes. The first flow path 17E and the second flow path 17F communicate with each other through the liquid passage holes 22E.

In this embodiment, the liquid passage holes 22A to 22F are formed by cutting an extruded product, and are substantially rectangular. The shape of the liquid passage holes 22A to 22F may be semicircular. Also, the area of the liquid passage holes 22A to 22F is approximately equal to the area of the cross section of the first channel 17A perpendicular to the X-axis direction.

Referring to FIGS. 1 and 7, the lid portions 50A and 50B are similar in shape to the main body portion 10 in a cross section perpendicular to the X-axis direction, and are rectangular parallelepiped members elongated in the Y-axis direction and having the same structure. is. In this embodiment, lid portion 50A is positioned at first end 15 (shown in FIG. 2) and lid portion 50B is positioned at second end 16 (shown in FIG. 2).

In this embodiment, the lids 50A and 50B are formed by cutting an aluminum alloy. It is preferable that the thermal conductivity of the lid portions 50A and 50B is 200 w/m·K or more. The lids 50A, 50B may be made of aluminum, copper, copper alloy, silver, or the like.

5 and 7, the lid portion 50B has a recess portion 51 of hollow structure. In a cross section perpendicular to the X-axis direction, the recessed portion 51 and the main body portion 10 have the same shape. By fitting the second end portion 16 side of the main body portion 10 into the recess portion 51, the second openings 19A, 19C, and 19E, which are openings on the second end portion 16 side of the first flow paths 17A, 17C, 17E, and 17G, are formed. , 19G are blocked. Similarly, by fitting the second end portion 16 side of the main body portion 10 into the recess portion 51, the second openings 19B, 19D, 19B, 19D, 19B, 19D, 19D, 19D, 19D, 19D, 19D, 19D, 19D, and 19B, which are openings on the second end portion 16 side of the second flow paths 17B, 17D, and 17F. 19F is blocked. The lid portion 50B is fixed to the main body portion 10 by any fixing method such as welding.

Also, referring to FIGS. 3 and 7, the lid portion 50A has a hollow portion 51 having a hollow structure. In a cross section perpendicular to the X-axis direction, the recessed portion 51 and the main body portion 10 have the same shape. By fitting the first end portion 15 side of the main body portion 10 into the recess portion 51, the first openings 18A, 18C, and 18E, which are openings on the first end portion 15 side of the first flow paths 17A, 17C, 17E, and 17G, are formed. , 18G are blocked. Similarly, by fitting the first end portion 15 side of the main body portion 10 into the recess portion 51, the first openings 18B, 18D, 18B, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18D, 18B, 18D, 18D, 18D, 18D, 18F is blocked. The lid portion 50A is fixed to the main body portion 10 by an arbitrary fixing method such as welding.

1 and 5, the lid portion 50B is provided with an outlet 53 aligned with the opening 19G. In this embodiment, the heat medium flows out from the first flow path 17G through the outlet 53 .

1 and 3, the lid 50A is provided with an inlet 52 aligned with the opening 18A. In this embodiment, the heat medium flows into the first flow path 17A through the inlet 52 .

Both the inflow port 52 and the outflow port 53 may be provided in the lid portion 50A. In this case, although illustration is omitted, the body portion 10 has, for example, three first flow paths 17A, 17C, 17E and three second flow paths 17B, 17D, 17F. Also, both the inflow port 52 and the outflow port 53 may be provided in the lid portion 50B.

In the heat collecting member 1 of this embodiment, the heat medium flows into the heat collecting member 1 through the inlet 52 and flows out of the heat collecting member 1 through the outlet 53 . A neutral to weakly alkaline heat medium is used so that the aluminum alloy does not rust. Specifically, a heat medium having a pH of 6 to 11 is used.

Referring to FIGS. 2 and 4, the heat medium that has flowed into the main body 10 meanders through the main body 10 as indicated by the two-dot chain line.

Specifically, referring to FIGS. 1, 3, and 5, the heat medium that has flowed in through the inlet 52 flows through the first flow path 17A from the first end 15 toward the second end 16. It flows into the second channel 17B through the liquid passage hole 22A. The heat medium that has flowed into the second flow path 17B flows from the second end 16 toward the first end 15 and flows into the first flow path 17C via the liquid passage holes 22B. Similarly, the heat medium that has flowed into the first flow path 17C flows through the first flow paths 17C, 17E, 17G and the second flow paths 17D, 17F via the liquid passage holes 22C to 22F, and then flows through the flow outlet 53. and flows out of the heat collecting member 1 . That is, the heat medium meanders from the inlet 52 toward the outlet 53 through the first flow paths 17A, 17C, 17E, 17G, the second flow paths 17B, 17D, 17F, and the liquid passage holes 22A to 22F. flow.

Referring to FIG. 8 , the heat collecting member 1 in this embodiment is installed in an agricultural house 70 . Plants such as vegetables are grown inside the agricultural house 70 . In the interior of the agricultural house 70, the south side with good sunlight conditions is a cultivation area 71 where crops are grown, and the north side with poor sunlight conditions is a non-cultivation area 72 (hatched part in the figure) where no plants are cultivated. The non-cultivation area 72 is, for example, an aisle, a material storage area, or the like. In this embodiment, the heat collecting member 1 is arranged in the upper part of the north side of the agricultural house 70 so that the shadow generated by the heat collecting member 1 is positioned in the non-cultivation area 72 . The heat collecting member 1 is arranged such that the upper surface (light receiving surface) 11c of the upper wall 11 is irradiated with sunlight.

9 and 10, a beam 73 is provided on the upper part of the agricultural house 70, and the heat collecting member 1 is installed on the beam 73 via a support portion 74. As shown in FIG. The support portion 74 supports the heat collecting member 1 so that the installation angle can be adjusted. Specifically, the support portion 74 includes a rotating plate 76 and leg portions 77 . The heat collecting member 1 is fixed to the rotating plate 76 , and the legs 77 are fixed to the beams 73 . Rotating plate 76 is rotatably fixed to leg 77 to adjust the angle of heat collecting member 1, and heat collecting member 1 is arranged such that upper surface 11c of main body 10 faces the sun. ing.

An example of a method of using the heat collecting member 1 of the present embodiment in an agricultural house 70 will be described with reference to FIG. 11 .

The agricultural house 70 includes a tank 78 , a pump 79 , a controller 80 and a radiator 81 . A heat medium is stored in the tank 78 , and the heat medium is sent to the heat collecting member 1 or the radiator 81 through the three-way valve 82 by the pump 79 fluidly connected to the tank 78 .

In the radiator 81, heat is exchanged between the air in the agricultural house 70 and the heat medium. Therefore, when the heated heat medium flows through the heat radiator 81, the air in the agricultural house 70 is warmed and the heat medium is cooled. In this embodiment, the heat collecting member 1 is used as the radiator 81 . The radiator 81 may be, for example, a tube laid on the ground in the cultivation area 71 .

The agricultural house 70 consists of a cultivation space 84 and an upper space 85 . The cultivation space 84 is a space below the beams 73 , and the upper space 85 is a space above the cultivation space 84 including the beams 73 . The heat collecting member 1 is arranged in the upper space 85 and the radiator 81 is arranged in the cultivation space 84 . The cultivation space 84 and the upper space 85 may be separated by a curtain 83 . The curtain 83 prevents the transfer of heat between the cultivation space 84 and the upper space 85 and improves the heat retention of the cultivation space 84 .

While the sunlight in the daytime is irradiating the heat collecting member 1, the three-way valve 82 is controlled by the control unit 80, and the heat medium stored in the tank 78 is pressure-fed by the pump 79 toward the heat collecting member 1. and circulate. In the meantime, the heat medium is heated by the heat collecting member 1 and the temperature rises. While the heat collecting member 1 is not irradiated with sunlight at night, the three-way valve 82 is controlled by the control unit 80, and the heat medium stored in the tank 78 is pressure-fed by the pump 79 toward the radiator 81. and circulate. In the meantime, the heat of the heated heat medium is transmitted to the air in the cultivation space 84 via the radiator 81, and the temperature in the cultivation space 84 rises. Therefore, inhibition of plant growth due to temperature drop at night can be alleviated, and the growth rate of plants can be improved.

Referring to FIG. 12 , as a modification of this embodiment, the heat collecting member 1 may be installed on a pillar 86 of an agricultural house 70 . The column 86 in the modified example is H-beam steel. The heat collecting member 1 is installed on the surface of the web 86a of the column 86 that is irradiated with sunlight so that the upper surface 11c faces the sun. Since the heat collecting member 1 is installed on the pillar 86 , the shadow of the heat collecting member 1 on the cultivation area 84 can be suppressed or prevented.

According to the heat collecting member 1 of the present embodiment, the sunlight irradiated to the main body 10 made of metal is converted into heat and stored in the heat medium. Further, the heat collecting member 1 is composed only of an extruded main body 10, lids 50A and 50B closing the hollow portion 20 of the main body 10, an inlet 52, and an outlet 53. The number of parts that make up the Therefore, the structure can be simplified. Therefore, the manufacturing process is also simplified, and the manufacturing man-hours can be shortened. Furthermore, since the body portion 10 is molded by extrusion, the length of the body portion 10 can be easily changed.

In addition, since the hollow portion 20 has two channels, the channel through which the heat medium flows becomes longer, and the contact area between the body portion 10 and the heat medium can be increased. Therefore, the heat of the main body 10 heated by sunlight can be efficiently transferred to the heat medium.

Furthermore, since the heat medium flows meanderingly, it is possible to ensure a large contact area between the main body 10 and the heat medium, and the contact time can be lengthened. Therefore, heat from sunlight can be efficiently stored in the heat medium. Further, by processing the body portion 10 and providing the liquid passage holes 22A to 22F, a flow path through which the heat medium flows meanderingly can be formed. Therefore, the lids 50A and 50B do not need to be processed to form meandering flow paths, and the lids 50A and 50B can be manufactured easily.

Moreover, since the supporting portion 74 is provided, the angle of the main body portion 10 can be adjusted so that the upper surface 11c is irradiated with sunlight through the supporting portion 74 .

(Second embodiment)
13 and 14, the configuration of the heat collecting member 1 according to the second embodiment differs from that of the first embodiment in the following points. The rest of the configuration of the second embodiment is the same as that of the first embodiment, and the same reference numerals are given to the same or similar elements as those of the first embodiment.

Referring to FIG. 13, main body 10 is not provided with liquid passage holes 22A to 22F (shown in FIGS. 3 and 5). That is, the body portion 10 is formed only by extrusion.

Referring to FIGS. 5 and 14, the lid portion 50B is a rectangular parallelepiped member elongated in the Y-axis direction, and includes a recess portion 51 having a hollow structure and a base portion 54 having a solid structure. The base portion 54 is provided with connection channels 55A, 55B, and 55C. 55 A of connection flow paths connect the 2nd opening 19A and the 2nd opening 19B, and bend the flow direction of a heat-medium by 180 degrees. That is, the connection channel 55A communicates the first channel 17A and the second channel 17B. Similarly, the connection channel 55B connects the second opening 19C and the second opening 19D, and the connection channel 55C connects the second opening 19E and the second opening 19F. That is, the connection channel 55B communicates the first channel 17C and the second channel 19D, and the connection channel 55C communicates the first channel 17E and the second channel 17F. Further, the base portion 54 is provided with an inflow/outflow flow path 56B. The inflow/outflow channel 56B connects the second opening 19G and the outflow port 53 .

Referring to FIGS. 3 and 14, the lid portion 50A is a rectangular parallelepiped member elongated in the Y-axis direction, and includes a recess portion 51 having a hollow structure and a base portion 54 having a solid structure. The base portion 54 is provided with connection channels 55D, 55E, and 55F. The connection flow path 55D connects the first opening 18F and the first opening 18G, and bends the flow direction of the heat medium by 180 degrees. That is, the connection channel 55D communicates the second channel 17F and the first channel 17G. Similarly, the connection channel 55E connects the first openings 18D and 18E, and the connection channel 55F connects the first openings 18B and 18C. That is, the connection channel 55E communicates the second channel 17D and the first channel 19E, and the connection channel 55F communicates the second channel 17B and the first channel 17C. Further, the base portion 54 is provided with an inflow/outflow flow path 56A. The inflow/outflow channel 56A connects the first opening 18A and the outflow port 52 .

The heat medium that has flowed in from the inlet 52 flows into the first flow path 17A through the inflow/outflow flow path 56A of the lid portion 50A, and flows through the first flow path 17A from the first end portion 15 toward the second end portion 16. and flows into the second flow path 17B via the connection flow path 55A of the lid portion 50B. The heat medium that has flowed into the second flow path 17B flows from the second end portion 16 toward the first end portion 15 and flows into the first flow path 17C via the connection flow path 55F of the lid portion 50A. The heat medium that has flowed into the first flow path 17C similarly flows through the first flow paths 17C, 17E, 17G, the second flow paths 17D, 17F, the connecting flow paths 55D, 55E of the lid portion 50A, and the connecting flow paths 55D, 55E of the lid portion 50B. It flows through the channels 55B and 55C and out of the heat collecting member 1 from the outlet 53 . In other words, the heat medium includes the first flow paths 17A, 17C, 17E, 17G, the second flow paths 17B, 17D, 17F, the connection flow paths 55D to 55F of the lid portion 50A, and the connection flow paths 55A to 55C of the lid portion 50B. , meanderingly flows from the inflow port 52 toward the outflow port 53 .

According to the heat collecting member 1 of the second embodiment, by processing the lid portions 50A and 50B to provide the connection channels 55A to 55F, channels through which the heat medium flows meanderingly can be formed. Therefore, processing for forming the meandering flow path in the body portion 10 is not required, and the manufacture of the body portion 10 can be facilitated.

(Third embodiment)
Referring to FIG. 15, the configuration of the heat collecting member 1 according to the third embodiment differs from that of the first embodiment in the following points. Other configurations of the third embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The body portion 10 in the third embodiment has a stepped structure 30 in a cross section perpendicular to the extending direction of the body portion 10 . Specifically, a step 31A is provided so that the second flow path 17B is one step higher than the first flow path 17A. Similarly, steps 31B-31F are provided.

According to the heat collecting member 1 of the third embodiment, the stepped structure 30 increases the sunlight irradiation area per installation area, so that the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density. In addition, since the irradiation area per area of the shadow generated by the heat collecting member 1 increases, an increase in the area of the shadow can be suppressed. Furthermore, since the body portion 10 is an extruded product, a structure having such a stepped structure 30 can be easily molded.

(Fourth embodiment)
Referring to FIG. 16, the configuration of the heat collecting member 1 according to the fourth embodiment differs from that of the first embodiment in the following points. Other configurations of the fourth embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The body portion 10 in the fourth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B. The body portion 10 has a curved portion 32 in a cross section perpendicular to the extending direction of the body portion 10 . Specifically, the upper wall 11 of the body portion 10 is convexly curved toward the lower wall 12 , and the lower wall 12 is concavely curved toward the upper wall 11 .

According to the heat collecting member 1 of the fourth embodiment, since the curved portion 74 increases the area irradiated with sunlight, the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density. In addition, since the irradiation area per area of the shadow generated by the heat collecting member 1 increases, an increase in the area of the shadow can be suppressed. Furthermore, since the body portion 10 is an extruded product, a structure having such a curved portion 74 can be easily molded.

(Fifth embodiment)
Referring to FIG. 17, the configuration of the heat collecting member 1 according to the fifth embodiment differs from that of the first embodiment in the following points. Other configurations of the fifth embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The body portion 10 in the fifth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

In the main body 10 according to the fifth embodiment, the thickness t1 of the partition wall 14A separating the first flow path 17A and the second flow path 17B is equal to the thickness t1 of the partition wall 14B separating the second flow path 17B and the first flow path 17C. 11, the lower wall 12, and the side walls 13A and 13B are thicker than the thickness t2.

According to the heat collecting member 1 of the fifth embodiment, heat exchange between the adjacent first flow paths 17A and second flow paths 17B can be suppressed. Therefore, the heat of the heat medium flowing through the second flow path 17B can be suppressed from being transferred to the heat medium flowing through the first flow path 17A, and a high heat medium temperature can be maintained in the second flow path 17B.

Referring to FIG. 18, in the modification of the main body 10 of the fifth embodiment, the thickness t1 of the portion defining the first flow path 17A is thicker than the thickness t2 of the other portions. That is, the thickness t1 of the first upper wall portion 11a, which is the portion of the upper wall 11 that defines the first flow path 17A, is the same as the thickness t1 of the upper wall 11 that defines the second flow path 17B and the first flow path 17C. 2 It is thicker than the thickness t2 of the upper wall portion 11b. In addition, the thickness t1 of the first lower wall portion 12a, which is the portion of the lower wall 12 that defines the first flow path 17A, is the thickness t1 of the lower wall 12 that defines the second flow path 17B and the first flow path 17C. 2 It is thicker than the thickness t2 of the lower wall portion 12b. Furthermore, the thickness t1 of the side wall 13A defining the first flow path 17A is thicker than the thickness t2 of the side wall 13B, and the thickness t1 of the partition wall 14A defining the first flow path 17A is less than the thickness t2 of the partition wall 14B. thicker than that.

According to the heat collecting member 1 in the modified example, it is possible to increase the heating efficiency of the first flow path 17A while suppressing heat exchange between the first flow path 17A and the second flow path 17B. The first upper wall portion 11a, the side wall 13A, the first lower wall portion 12a, and the partition wall 14A that define the first flow path 17A are thick and have a large heat capacity. Therefore, the first flow path 17A can have higher heating efficiency than the second flow path 17B and the first flow path 17C.

(Sixth embodiment)
Referring to FIG. 19, the configuration of the heat collecting member 1 according to the sixth embodiment differs from that of the first embodiment in the following points. The rest of the configuration of the sixth embodiment is the same as that of the first embodiment, and the same or similar elements as those of the first embodiment are given the same reference numerals.

The body portion 10 in the sixth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

In the body portion 10 according to the sixth embodiment, a partition wall 14A separating the first flow path 17A and the second flow path 17B is provided so as to connect the upper wall 11 and the side wall 13A. That is, the cross-sectional area perpendicular to the extending direction of the first channel 17A, that is, the channel cross-sectional area S1 is the cross-sectional area perpendicular to the extending direction of the second channel 17B and the first channel 17C, That is, it is smaller than the channel cross-sectional area S2. In other words, the channel cross-sectional area S1 of the first channel 17A aligned with the inlet 52 (shown in FIG. 1) is smaller than the channel cross-sectional area S2 of the second channel 17B. In the sixth embodiment, the cross-sectional areas perpendicular to the extending direction of the second flow path 17B and the first flow path 17C are equal.

According to the heat collecting member 1 of the sixth embodiment, the pressure loss of the heat medium occurs in the first flow path 17A aligned with the inlet 52, the flow velocity of the heat medium decreases, and the heat medium flows into the body portion 10. longer contact time. Therefore, the heating efficiency of the heat medium can be improved.

(Seventh embodiment)
Referring to FIG. 20, the configuration of the heat collecting member 1 according to the seventh embodiment differs from that of the first embodiment in the following points. Other configurations of the seventh embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The body portion 10 in the seventh embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

A plurality of ribs (first ribs) 33A protruding toward the first flow path 17A are provided on the upper wall 11 of the main body 10 at intervals. The rib 33A extends from the first end portion 15 (shown in FIG. 2) to the second end portion 16 (shown in FIG. 2) along the extending direction of the body portion 10. As shown in FIG. Similarly, ribs (first ribs) 33B and 33C are provided in the second flow path 17B and the first flow path 17C. The ribs 33A to 33C are integrally extruded with the body portion 10. As shown in FIG.

According to the heat collecting member 1 of the seventh embodiment, the provision of the ribs 33A to 33C increases the contact area between the main body 10 and the heat medium. Therefore, the heat generated by the sunlight irradiated and converted to the main body 10 can be efficiently transferred to the heat medium and stored. That is, it can cope with the decrease in solar energy density. Further, since the body portion 10 is an extruded product, a structure having such ribs 33A to 33C can be easily formed.

21 to 23 show cross-sectional views of the body portion 10 in the modification of the seventh embodiment.

Referring to FIG. 21, a plurality of ribs 33A projecting toward the first flow path 17A are provided on the lower wall 12 of the main body 10 with a gap therebetween. The rib 33A extends from the first end portion 15 (shown in FIG. 2) to the second end portion 16 (shown in FIG. 2) along the extending direction of the body portion 10. As shown in FIG. Ribs 33B and 33C are similarly provided in the second flow path 17B and the first flow path 17C.

Referring to FIG. 22, a plurality of ribs 33A projecting toward the first flow path 17A are provided on the side wall 13A of the main body 10 at intervals. The rib 33A extends from the first end portion 15 (shown in FIG. 2) to the second end portion 16 (shown in FIG. 2) along the extending direction of the body portion 10. As shown in FIG. Further, in the main body 10, a plurality of ribs 33B projecting toward the second flow path 17B are provided on the partition wall 14A with a gap therebetween. The rib 33B extends from the first end 15 (shown in FIG. 2) to the second end 16 (shown in FIG. 2) along the extending direction of the main body 10. As shown in FIG. Ribs 33C are similarly provided on the partition wall 14B in the first flow path 17C.

Referring to FIG. 23, a plurality of ribs 33A projecting toward the first flow path 17A are provided on the partition wall 14A of the main body 10 with a gap therebetween. The rib 33A extends from the first end portion 15 (shown in FIG. 2) to the second end portion 16 (shown in FIG. 2) along the extending direction of the body portion 10. As shown in FIG. A rib 33B is provided on the partition wall 14B in the same way in the second flow path 17B. Further, in the body portion 10, a plurality of ribs 33C projecting toward the first flow path 17C are provided on the side wall 13B with a gap therebetween. The rib 33C extends from the first end portion 15 (shown in FIG. 2) to the second end portion 16 (shown in FIG. 2) along the extending direction of the main body portion 10. As shown in FIG.

(Eighth embodiment)
Referring to FIG. 24, the configuration of the heat collecting member 1 according to the eighth embodiment differs from that of the first embodiment in the following points. Other configurations of the eighth embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The body portion 10 in the eighth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

A plurality of recesses (first recesses) 42A are provided on the upper wall 11 of the main body 10 at intervals so as to face the first flow path 17A. The recess 42A extends from the first end 15 (shown in FIG. 2) to the second end 16 (shown in FIG. 2) along the extending direction of the main body 10. As shown in FIG. Similarly, recesses (first recesses) 42B and 42C are provided in the second flow path 17B and the first flow path 17C. The concave portions 42A to 42C are integrally extruded with the body portion 10. As shown in FIG. Further, the recesses 42A to 42C may be provided on the lower wall 12 or the side walls 13A and 13B, or may be provided on all of the upper wall 11, the lower wall 12 and the side walls 13A and 13B.

According to the eighth embodiment, since the concave portions 42A to 42C are provided, the contact area between the main body portion 10 and the heat medium is increased. Therefore, the heat generated by the sunlight irradiated and converted to the main body 10 can be efficiently transferred to the heat medium and stored. That is, it can cope with the decrease in solar energy density. Also, since the body portion 10 is an extruded product, the concave portions 42A to 42C can be easily molded.

(Ninth embodiment)
Referring to FIG. 25, the configuration of the heat collecting member 1 according to the ninth embodiment differs from that of the first embodiment in the following points. The rest of the configuration of the ninth embodiment is the same as that of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The body portion 10 in the ninth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

A plurality of ribs (second ribs) 41 protruding toward the outside of the body portion 10 are provided on the upper surface 11c of the body portion 10 with a gap therebetween. Ribs 41 extend from first end 15 (shown in FIG. 2) to second end 16 (shown in FIG. 2) along the extending direction of main body 10 . The rib 41 is integrally extruded with the body portion 10 .

According to the heat collecting member 1 of the ninth embodiment, since the ribs 41 are provided, the area of the body portion 10 irradiated with sunlight can be increased. That is, the heat medium can be heated by the sunlight irradiated on the ribs 41 in addition to the sunlight irradiated on the upper surface 11c. Therefore, the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density.

(Tenth embodiment)
Referring to FIG. 26, the configuration of the heat collecting member 1 according to the tenth embodiment differs from that of the first embodiment in the following points. Other configurations of the tenth embodiment are the same as those of the first embodiment, and the same reference numerals are given to the same or similar elements as those of the first embodiment.

The main body part 10 in the tenth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

A plurality of concave portions (second concave portions) 43 are provided on the upper surface 11c of the body portion 10 at intervals so as to face the outside of the body portion 10 . The recessed portion 43 extends from the first end portion 15 (shown in FIG. 2) to the second end portion 16 (shown in FIG. 2) along the extending direction of the main body portion 10 . The concave portion 43 is integrally extruded with the main body portion 10 .

According to the tenth embodiment, since the concave portion 43 is provided, the area of the body portion 10 irradiated with sunlight can be increased. That is, the heat medium can be heated by the sunlight irradiated to the concave portion 43 in addition to the sunlight irradiated to the upper surface 11c. Therefore, the heating efficiency of the heat medium can be improved. That is, it can cope with the decrease in solar energy density. Further, since the body portion 10 is an extruded product, the concave portion 43 can be easily formed.

Further, in the tenth embodiment, the concave portion 43 is inclined and recessed. Therefore, the area irradiated with sunlight can increase.

(Eleventh embodiment)
27 and 28, the configuration of the heat collecting member 1 according to the eleventh embodiment differs from that of the first embodiment in the following points. Other configurations of the eleventh embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

Referring to FIG. 27, the body portion 10 in the eleventh embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B. A cross-sectional shape perpendicular to the extending direction of the first flow paths 17A, 17C and the second flow path 17B is round.

According to the heat collecting member 1 of the eleventh embodiment, the proportion of the metal portion per volume in the main body 10 can be increased. Therefore, the amount of heat retained by the metal portion can be increased, and the heating efficiency of the heat medium can be improved. In addition, since the cross-sectional shape is round, it is possible to prevent air from remaining in the first flow paths 17A and 17C and the second flow path 17B. Therefore, the contact area between the body portion 10 and the heat medium increases, and the heating efficiency of the heat medium can be increased.

Referring to FIG. 28, in the modification of the eleventh embodiment, the cross-sectional shape perpendicular to the extending direction of the first flow paths 17A, 17C and the second flow path 17B is star-shaped.

According to the heat collecting member 1 in the modified example of the eleventh embodiment, the proportion of the metal portion per volume in the body portion 10 can be increased. Therefore, the amount of heat retained by the metal portion can be increased, and the heating efficiency of the heat medium can be improved. Moreover, since the cross-sectional shape is star-shaped, the contact area between the main body 10 and the heat medium increases, and the heating efficiency of the heat medium can be increased.

(12th embodiment)
Referring to FIG. 29, the configuration of the heat collecting member 1 according to the twelfth embodiment differs from that of the first embodiment in the following points. Other configurations of the twelfth embodiment are the same as those of the first embodiment, and the same reference numerals are given to the same or similar elements as those of the first embodiment.

The body portion 10 in the twelfth embodiment is composed only of the first flow paths 17A, 17C and the second flow path 17B.

The top wall 11 in the twelfth embodiment has flanges 34A and 34B projecting from the top wall 11 beyond the pair of side walls 13A and 13B, that is, extending in both directions along the Y-axis direction. The flange portion 34A has an upper surface (light receiving surface) 35A facing the sun. Moreover, the flange part 34B is provided with the upper surface (light-receiving surface) 35B which faces the sun. In the twelfth embodiment, the upper surfaces 35A and 35B are flush with the upper surface 11c. In the twelfth embodiment, the flanges 34A and 34B are integrally extruded with the top wall 11, but they may be formed separately and integrated with the top wall 11 by welding or the like.

Black films 36A, 36B, and 36C are coated on the upper surfaces 35A, 35B and the upper surface 11c. The black films 36A to 36C are, for example, high emissivity films made by electrolytically treating an aluminum alloy, and absorb light of almost all wavelengths of sunlight.

In the heat collecting member 1 according to the twelfth embodiment, heat insulators 37A, 37B, 37C, 37D, and 37E are arranged on the outer surface 40 of the body portion 10 excluding the upper surfaces 35A, 35B and the upper surface 11c. In the twelfth embodiment, the outer surface 40 of the body portion 40 includes upper surfaces 35A and 35B, an upper surface 11c, a lower surface 38A of the flange portion 34A, an outer surface 39A of the side wall 13A, a lower surface 12c of the lower wall 12, an outer surface 39B of the side wall 13B, and a flange portion. Includes lower surface 38B of portion 34B. The heat insulating material 37A is arranged in contact with the lower surface 38A, and the heat insulating material 37B is arranged in contact with the outer surface 39A. Also, the heat insulating material 37C is arranged so as to be in contact with the lower surface 12c, and the heat insulating material 37D is arranged so as to be in contact with the outer surface 39B. Furthermore, the heat insulating material 37E is arranged so as to be in contact with the lower surface 38B.

According to the heat collecting member 1 of the twelfth embodiment, since the emissivity of the upper surfaces 35A, 35B and the upper surface 11c can be improved, the heating efficiency of the heat medium by sunlight can be improved.

In addition, since the upper surfaces 35A and 35B are provided, the sunlight receiving area is increased, and the heating efficiency of the heat medium can be improved.

Furthermore, since the heat insulating materials 37A to 37E are provided, it is possible to suppress or prevent the heated heat medium or the heat of the main body 10 from being released to the atmosphere or the like. Therefore, the heating efficiency of the heat medium can be improved.

(13th embodiment)
30 and 31, the configuration of the heat collecting member 1 according to the thirteenth embodiment differs from that of the first embodiment in the following points. Other configurations of the thirteenth embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

The main body 10 includes an upper wall 11, a lower wall 12, and a pair of side walls 13A and 13B, and is formed in a panel shape as a whole, that is, a low and long rectangular parallelepiped shape. The upper wall 11 and the lower wall 12 are formed in a rectangular shape in plan view. A pair of side walls 13A and 13B connects the long sides of the upper wall 11 and the lower wall 12 in the vertical direction and extends in the longitudinal direction (X direction). The body portion 10 has a hollow portion 20 as an internal space defined by these four walls 11, 12, 13A and 13B. The hollow portion 20 is open at both longitudinal ends (ie, the first end 15 and the second end 16). In other words, the main body 10 has a pair of rectangular openings defined by the edges of the four walls 11 to 14 at both ends in the longitudinal direction.

The hollow portion 20 is partitioned by a plurality of partition walls 14 . The plurality of partition walls 14 are arranged at intervals in the short side direction (Y direction) and extend in the longitudinal direction. Each partition 14 is connected at its upper end to the inner surface of the upper wall 11 and at its lower end to the inner surface of the lower wall 12 . The hollow portion 20 is partitioned into a plurality of long holes aligned in the short side direction, and each long hole extends in parallel along the longitudinal direction of the main body portion 10 from the first end portion 15 toward the second end portion 16 . . In this embodiment, the partition walls 14 are arranged at regular intervals. The vertical distance between the upper wall 11 and the lower wall 12 is uniform over the entire body portion 10 . The plurality of long holes have rectangular cross sections of equal area. In the illustrated example, the number of partition walls 14 is 6, and the number of long holes is 7, which is one more than that, but the number of long holes is not particularly limited as long as it is plural.

Each slot has a first opening 18 open at a first end 15 and a second opening 19 open at a second end 16 . Both ends of each partition 14 are positioned in the internal space defined by the four walls 11-14. Therefore, both the first opening 18 and the second opening 19 of each slot are arranged in the internal space.

The body portion 10 has a first recess portion 23 at the first end portion 15 that communicates the opening of the body portion 10 with each of the plurality of first openings 18 , and a plurality of openings of the body portion 10 at the second end portion 16 . has a second concave portion 24 that communicates with each of the second openings 19 of the .

The first end 15 is liquid-tightly fitted into the recess 51 of the lid 50A, and the second end 16 is liquid-tightly fitted into the recess 51 of the lid 50B. Thereby, the heat collecting member 1 is configured. The heat medium that has flowed in from the inlet 52 flows into each of the plurality of long holes via the first recesses 23 and the plurality of first openings 18 . The heat medium flows from the first end portion 15 toward the second end portion 16 in each of the plurality of elongated holes. That is, each of these elongated holes serves as the first flow path 17 for flowing the heat medium from the first end portion 15 toward the second end portion 16 . The heat medium in each first flow path 17 joins at the second recess 24 via the corresponding second opening 19 . The heat medium inside the second recess 24 flows out through the outlet 53 .

Unlike the first embodiment in which the heat medium flows meanderingly, in this embodiment, the heat collecting member 1 extends from the second end 16 where the outflow port 53 is arranged to the first end where the inflow port 52 is arranged. 15 (for example, the flow paths 17B, 17D, and 17F shown in FIG. 3) are not provided. The hollow portion 20 of the heat collecting member 1 is a plurality of first flow paths 17 connected in parallel to the first recesses 23 and the second recesses 24 . The heat medium is split from the first recess 23 into the first flow path 17 , flows in one direction from the first end 15 toward the second end 16 , and joins at the second recess 24 .

Note that after the pump 79 is started, the flow of the heat medium is formed in order from the one closest to the inlet 52 among the plurality of first flow paths 17 . Therefore, the temperature of the heat medium in the flow paths closer to the inlet 52 is higher, and the temperature of the heat medium in the flow path farther from the inlet 52 is lower. has a slope.

Also in this embodiment, the heat collecting member 1 with a simplified structure can be provided. Furthermore, since the plurality of first flow paths 17 are connected in parallel and the heat medium flows through the heat collecting member 1 in one way, it is easy to secure the flow rate of the heat medium. When the flow rate increases, it becomes possible to lower the room temperature with the heat medium when the room temperature rises excessively, and it can also be used as an auxiliary device for cooling equipment. Moreover, since the residence time of the heat medium is shortened, the load on the pump 79 can be reduced.

(14th embodiment)
Referring to FIG. 32, the configuration of the heat collecting member 1 according to the fourteenth embodiment differs from that of the first embodiment in the following points. Other configurations of the fourteenth embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

Unlike the thirteenth embodiment, both ends of the partition wall 14 in the longitudinal direction are located at approximately the same positions as the edges of the main body 10 in the longitudinal direction as a whole. Instead, the pair of lids 50A and 50B have stoppers 57 protruding into the recess 51. As shown in FIG. Therefore, when the first end portion 15 is fitted into the recess portion 51, the first end portion 15 abuts against the stopper 57 before reaching the inner bottom surface of the recess portion 51, and is restricted from moving in the longitudinal direction there. be. The second end 16 is similar to this. As a result, the pair of lid portions 50A and 50B are provided with common flow paths 58A and 58B communicating with the plurality of first flow paths 17 outside the stopper 57 (on the inner side of the recess 51). A common channel 58A of the lid portion 50A communicates with the inlet 52, and a common channel 58B of the lid portion 50B communicates with the outlet 53. As shown in FIG.

Also in this embodiment, similarly to the thirteenth embodiment, the heat medium flows into the common flow path 58A through the inlet 52, is divided from the common flow path 58B into the plurality of first flow paths 17, and flows into the common flow path 58B. They merge in the flow path 58B and flow out of the heat collecting member 1 through the outflow port 53 . As a result, the same effects as those of the thirteenth embodiment can be obtained.

(15th embodiment)
33 to 36B, the configuration of the heat collecting member 1 according to the fifteenth embodiment differs from that of the first embodiment in the following points. Other configurations of the fifteenth embodiment are the same as those of the first embodiment, and the same or similar elements as those of the first embodiment are denoted by the same reference numerals.

As shown in FIG. 33, the agricultural house 70 includes a plurality of pillars 86, beams 73 that connect the upper ends of the pillars 86, and joining beams that are provided above the beams 73 and form a gabled roof framework. 87. The agricultural house 70 has a rectangular outer contour in a plan view, and six pillars 86 are installed near the four corners of the outer contour and the midpoints of a pair of long sides of the outer contour. The beams 73 have a pair of long beams 73a extending along the long sides of the outline and a plurality of short beams 73b connecting the upper ends of two columns 86 arranged in the short side direction of the outline. . Further, the beam 73 includes a first auxiliary beam 89a and a second auxiliary beam 89b arranged within a region surrounded by the long beam 73a and the short beam 73b, the first auxiliary beam 89a extending parallel to the long beam 73a. , the second auxiliary beam 89b extends parallel to the short beam 73b. The interior of the agricultural house 70 can be roughly divided into an upper space 85 above the beams 73 and a cultivation space 84 below the beams 73 . Cultivation space 84 can be broadly divided into a cultivation area 71 on the south side and a non-cultivation area 72 on the north side.

A farm house 70 includes one or more heat collecting members 1 . Although FIG. 33 illustrates four heat collecting members 1, the number of heat collecting members 1 can be changed. Each heat collecting member 1 is supported by the beams 73 (especially the auxiliary beams 89a and 89b) in a posture in which the longitudinal direction (X direction) faces the short side direction of the farm house 70 in plan view. , the beams 73 of the agricultural house 70 function as supporting members for supporting the heat collecting member 1 . The four heat collecting members 1 are arranged at regular intervals in the long side direction of the farm house 70 in a plan view.

Referring to FIG. 34, heat collecting member 1 is also formed in a panel shape in the present embodiment. In other words, the heat collecting member 1 is formed in a low-profile and long rectangular parallelepiped shape. The heat collecting member 1 includes a body portion 10 and a pair of lid portions 50A and 50B in the same manner as in the previous embodiments. The flow path inside the heat collecting member 1 may be configured in a meandering shape as in the first embodiment, or may be configured in a one-way type as in the thirteenth embodiment.

Up to now, two of the four walls forming the outer shape of the main body 10 have been referred to as the upper wall 11 and the lower wall 12, which have wide rectangular surfaces. and a second wall 92 on the back side. This is because, in the present embodiment, which wall 91 or 92 faces upward can be freely selected by rotating the heat collecting member 1 .

A plurality of fins 93 are provided on the outer surface of the first wall 91 . The fins 93 may be provided integrally with the main body portion 10, or may be joined to the first wall 91 by joining means such as welding. In this embodiment, each fin 93 extends in the lateral direction (Y direction) of the main body 10, and a plurality of fins 93 are arranged in the longitudinal direction (X direction) of the main body 10 at intervals. But this is just an example. The number of fins 93, the extending direction of the fins 93, and the arrangement direction of the fins 93 can be changed as appropriate.

The body portion 10 includes a heat collecting portion 94 on the surface side where the first wall 91 and the fins 93 are provided. The body portion 10 has a reflecting portion 95 on the back side where the second wall 92 is provided. When sunlight is irradiated, the heat collecting part 94 collects heat from the sunlight. When sunlight is irradiated, the reflecting portion 95 reflects the irradiated sunlight.

The heat collector 94 is configured by painting the outer surface of the first wall 91 of the main body 10 and the surface of the fins 93 black. The main body 10 according to the present embodiment is made of an aluminum alloy, and the reflecting part 95 is formed by making the main body 10 pure (for example, uncoated). Any material may be coated with a paint that reflects light. In the illustrated example, the side wall 13B is partially painted black for convenience of illustration of the heat collecting portion 94, but the heat collecting portion 94 is provided at least on the outer surface of the first wall 91 Well, it does not have to be provided on the side wall 13B.

A pair of rotating shafts 96 protruding in the longitudinal direction (X direction) of the heat collecting member 1 is provided on the outer surfaces of the pair of lid portions 50A and 50B. The pair of rotating shafts 96 are coaxial with each other. The pair of rotating shafts 96 are rotatably supported by bearings (not shown) provided on the supporting member. As a result, the heat collecting member 1 and its main body 10 are supported so that the angle can be adjusted with respect to the agricultural house 70 around the rotating shaft 96 . In this embodiment, the short side direction of the farm house 70 in plan view is along the east-west direction, and the rotation shaft 96 is oriented in the east-west direction. This allows the panel 1 to face the sun by changing the angle according to the altitude of the sun.

As shown in FIG. 35 , the agricultural house 70 includes a rotation mechanism 100 that synchronously changes the mounting angles of the plurality of heat collecting members 1 with respect to the structural member when the farm house 70 includes a plurality of heat collecting members 1 . The rotating mechanism 100 may be manually operated, or may be automatically operated by a driving force generated by an actuator such as an electric motor. FIG. 35 shows an example of a manual type.

The rotating mechanism 100 is composed of a cord 101 and a plurality of pulleys 102 to 104 around which the cord 101 is wound. The cord 101 has a first upwardly extending portion 101a, a first vertical portion 101b, a second vertical portion 101c and a second upwardly extending portion 101d. These portions 101a to 101d are continuous in this order.

The first upwardly extending portion 101a extends along the support member and is sequentially fixed to one end portion in the lateral direction of the longitudinal end surfaces of each of the plurality of heat collecting members 1 . The first vertical portion 101b extends downward from the first upwardly extending portion 101a. The second vertical portion 101c extends upward from the lower end of the first vertical portion 101b. The second upwardly extending portions 101c extend along the supporting member and are sequentially fixed to the other end portions in the short direction of the end faces in the longitudinal direction of each of the plurality of heat collecting members 1 . The pair of lid portions 50A and 50B has locking portions 97 (see FIG. 34) for locking the first upwardly extending portion 101a and the second extending portion 101b.

The lower ends of the first vertical portion 101b and the second vertical portion 101c are located within the cultivation space 73. As shown in FIG. When the worker of the agricultural house 70 pulls the first vertical portion 101b downward, the four heat collecting members 1 rotate synchronously counterclockwise in FIG. When the worker of the agricultural house 70 pulls the second vertical portion 101c downward, the four heat collecting members 1 rotate clockwise in FIG. 35 synchronously. Due to the action of the rotating mechanism 100, the heat collecting member 1 is synchronously changed in angle between a heat collecting position in which the heat collecting portion 94 is directed upward and a light shielding position in which the reflecting portion 95 is directed upward. be done.

As shown in FIG. 36A , when the heat collecting member 1 is positioned at the heat collecting position, the reflecting portion 95 faces the cultivation space 84 and the heat collecting portion 94 is irradiated with sunlight. The heat collecting part 94 collects heat from sunlight, and the heat medium flowing inside the heat collecting member 1 is heated. Since the fins 93 function as the heat collecting portions 94, a large surface area of the heat collecting portions 94 can be ensured with respect to the plane area of the heat collecting member 1, and the heat collecting efficiency is high. By directing the heat collecting part 94 upward in winter, it becomes easy to maintain the temperature of the cultivation space 84 at a temperature suitable for cultivation.

As shown in FIG. 36B , when the heat collecting member 1 is positioned at the light shielding position, the heat collecting portion 94 faces the cultivation space 84 while the sunlight is applied to the reflecting portion 95 . The reflecting portion 95 reflects sunlight. Therefore, solar energy is not used to raise the temperature of the heat medium. On the other hand, within the cultivation space 84, convective heat transfer tends to result in higher temperatures at the top. The heat collecting part 94 absorbs heat rays from the upper region of the cultivation space 84 . As a result, when the temperature of the cultivation space 84 rises excessively, the heat collecting part 94 functions to adjust the temperature in the cultivation space 84 to an appropriate temperature by this endothermic effect. Since the fins 93 function as the heat collectors 94, the heat absorbing effect is improved. By facing the cultivation space 84 with the reflecting part 95 facing upward and the heat collecting part 94 facing downward in summer, it becomes easy to maintain the temperature of the cultivation space 84 at a temperature suitable for cultivation.

As described above, according to the present embodiment, it is easy to maintain the temperature of the cultivation space 84 at an appropriate temperature throughout the year when the agricultural house 70 is installed in an area where the temperature fluctuates greatly throughout the year.

Reference Signs List 1 heat collecting member 10 main body 11 upper wall 11a first upper wall portion 11b second upper wall portion 11c upper surface (light receiving surface)
12 lower wall 12a first lower wall portion 12b second lower wall portion 12c lower surface 13A, 13B side walls 14A, 14B, 14C, 14D, 14E, 14F partition wall 15 first end 16 second end 17A, 17C, 17E, 17G First flow path 17B, 17D, 17F Second flow path 18A, 18B, 18C, 18D, 18E, 18F, 18G First opening 19A, 19B, 19C, 19D, 19E, 19F, 19G Second opening 20 Hollow part 22A, 22B, 22C, 22D, 22E, 22F Liquid passage hole 30 Step structure 31A, 31B, 31C, 31D, 31E, 31F Step 32 Curved portion 33A, 33B, 33C Rib (first rib)
34A, 34B flange portion 35A, 35B upper surface (light receiving surface)
36A, 36B, 36C black film 37A, 37B, 37C, 37D, 37E heat insulating material 38A, 38B lower surface 39A, 39B outer surface 40 outer surface 41 rib (second rib)
42A, 42B, 42C recess (first recess)
43 recess (second recess)
50A, 50B Lid 51 Recess 52 Inlet 53 Outlet 54 Base 55A, 55B, 55C, 55D, 55E, 55F Connection channel 56A, 56B Inflow/outflow channel 70 Agricultural house 71 Cultivation area 72 Non-cultivation area 73 Beam 74 support part 76 rotating plate 77 leg part 78 tank 79 pump 80 control part 81 radiator 82 three-way valve 83 curtain 84 cultivation space 85 upper space 86 pillar 86a web

Claims (26)

a main body portion which is a metal extrusion having a hollow portion extending from a first end portion toward a second end portion and having a light-receiving surface irradiated with sunlight;
a pair of lid portions respectively arranged at the first end portion and the second end portion and closing the hollow portion;
an inflow port provided in one of the pair of lid portions through which a heat medium flows into the hollow portion;
A heat collecting member, comprising: an outflow port provided in one of the pair of lid portions, through which the heat transfer medium flows out from the hollow portion. The hollow portion is
a first flow path through which the heat medium flows from the first end toward the second end;
2. The second flow path arranged adjacent to the first flow path with a partition wall therebetween, wherein the heat medium flows from the second end toward the first end. Heat collecting material. The partition wall is provided with a liquid passage hole that connects the first flow path and the second flow path so that the heat medium meanders and flows from the inflow port toward the outflow port. The heat collecting member according to claim 2. Each of the pair of lids is provided with a connection flow path connecting the first flow path and the second flow path so that the heat transfer medium meanders from the inlet to the outlet. The heat collecting member according to claim 2, provided with a The heat collecting member according to claim 2, wherein the cross-sectional area of the first flow path aligned with the inlet is smaller than the cross-sectional area of the second flow path. 3. The hollow portion according to claim 2, wherein the hollow portion includes a plurality of first flow paths that are arranged adjacent to each other via partition walls and that allow the heat medium to flow from the first end toward the second end. Heat collecting material. In each of the pair of lids, the heat transfer medium is branched from the inlet to the plurality of first flow paths, joined from the plurality of first flow paths, and flows toward the outlet. 7. The heat collecting member according to claim 6, further comprising a common channel communicating with each of the opening ends of the plurality of first channels. The structural member main body has recesses provided at the first end portion and the second end portion for communicating the ends of the plurality of first flow paths, and each of the pair of lid portions includes: 7. The heat collecting member according to claim 6, further comprising an inflow/outflow channel that communicates the inflow port or the outflow port with the recess. The heat collecting member according to any one of claims 1 to 8, further comprising a supporting portion that supports the main body portion so that the angle thereof can be adjusted. The main body is formed in a panel shape,
The main body portion is provided on the front side of the panel shape to collect heat from the irradiated sunlight, and the main body portion is provided on the back side of the panel shape to reflect the irradiated sunlight. and
10. The supporting part supports the main body so that the angle of the main body can be adjusted between a heat collecting position where the heat collecting part faces upward and a light shielding position where the reflecting part faces upward. The heat collecting member according to . The heat collecting member according to claim 10, wherein the heat collecting portion includes a covering portion that covers the surface of the main body portion, and fins that protrude from the covering portion. The heat collecting member according to claim 10, wherein the heat collecting portion is painted black. The heat collecting member according to claim 10, wherein the body portion is made of aluminum or an aluminum alloy, and the reflecting portion is configured by making the back surface side solid. The heat collecting member according to any one of claims 1 to 8, wherein the main body has a stepped structure in a cross section perpendicular to the extending direction. The heat collecting member according to any one of claims 1 to 8, wherein the body portion has a curved portion in a cross section perpendicular to the extending direction. The heat collecting member according to any one of claims 1 to 8, wherein the hollow portion is provided with a first rib along a direction in which the hollow portion extends. The heat collecting member according to any one of claims 1 to 8, wherein the hollow portion is provided with a first concave portion along a direction in which the hollow portion extends. The heat collecting member according to any one of claims 1 to 8, wherein the light receiving surface is provided with a second rib along the direction in which the main body extends. The heat collecting member according to any one of claims 1 to 8, wherein the light-receiving surface is provided with a second concave portion along a direction in which the main body portion extends. The heat collecting member according to any one of claims 1 to 8, wherein the light receiving surface is coated with a black film. The heat collecting member according to any one of claims 1 to 8, wherein a heat insulating material is arranged on the outer surface of the main body portion excluding the light receiving surface. The main body is
a plate-like upper wall;
a plate-shaped lower wall arranged to face the upper wall;
The heat collecting member according to any one of claims 1 to 8, further comprising a pair of side walls connecting an end portion of the upper wall and an end portion of the lower wall. the upper wall includes a flange portion protruding beyond the pair of side walls from the upper wall,
The heat collecting member according to claim 22, wherein an upper surface of the upper wall and the flange portion facing the sun is the light receiving surface. The heat collecting member according to claim 22, wherein the thickness of the partition wall is thicker than the thicknesses of the upper wall, the lower wall, and the side walls. An agricultural house comprising one or more heat collecting members according to any one of claims 1 to 8. each of the heat collecting members includes a main body formed in a panel shape and supported by a structural member of the house so that the angle can be adjusted;
The body portion includes a heat collecting portion provided on the front side of the panel shape and collecting heat from the irradiated sunlight, and a reflecting portion provided on the back side of the panel shape and reflecting the irradiated sunlight. with
The house includes a rotation mechanism that synchronously changes the angles of the plurality of heat collecting members with respect to the structural member.
The heat collecting member according to claim 25.

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