Temperature adjusting system and temperature adjusting panel for plant growth

Abstract

A temperature adjustment system (1) is provided with: one or more rows of long cultivation beds (10A-10C) for accommodating a culture medium (3); and temperature adjustment panels (20A-20B) having a pair of main walls (31, 32) facing each other in the thickness direction thereof. The pair of main walls (31, 32) demarcate a heat medium flow path (51) through which a heat medium that is higher or lower than the ambient temperature flows, and form a profile that is longer than the wall thickness (t20) in a cross-section. The temperature adjustment panels (20A-20B) extend in the bed length direction of the cultivation beds (10A-10C), and the outer surface of at least one of the pair of main walls (31, 32) is disposed close to the culture medium (3) or the plant (2).

Description

Technical Field

[0001] The invention relates to a temperature regulating system and a temperature regulating panel for plant growth. Background Art

[0002] Patent Documents 1 and 2 disclose a growth device that has a water pipe through which a heat medium flows and adjusts the temperature around plants or culture medium. For example, the roots of seedlings of plants such as strawberries are made to grow on the outer surface of the water pipe, thereby promoting the growth of the plants.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-148020

[0006] Patent Document 2: Japanese Patent Application Publication No. 2017-153471 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In the above device, since the area where the temperature can be adjusted is limited to a local area, there are limitations on the variety of plants that can be promoted to grow. In this regard, there is room for improvement in the above device.

[0009] The present disclosure aims to provide a temperature control system and a temperature control panel that can contribute to the growth of a wider variety of plants.

[0010] Means used to solve problems

[0011] One method of the present disclosure provides a temperature adjustment system for plant growth, which is a temperature adjustment system for assisting the growth of plants planted in a culture medium; it comprises: one or more long cultivation beds in a row, accommodating the aforementioned culture medium; and a temperature adjustment panel, which is formed into a panel shape with a wall thickness and has a heat medium flow path formed inside it for circulating a heat medium with a higher or lower temperature than the ambient temperature; the aforementioned temperature adjustment panel has a pair of main walls opposed to each other in the thickness direction of the aforementioned temperature adjustment panel, and the aforementioned pair of main walls form a profile longer than the aforementioned wall thickness in a cross section; the aforementioned temperature adjustment panel extends along the bed length direction of the aforementioned cultivation bed, and the outer surface of at least one of the aforementioned pair of main walls is arranged close to the aforementioned culture medium or the aforementioned plant.

[0012] According to the above structure, the temperature adjustment panel has a pair of main walls that define the heat medium flow path through which the heat medium circulates. The pair of main walls form a profile that is longer than the wall thickness in the cross section (i.e., the cross section perpendicular to the length direction), and thus have an outer surface with a relatively large area. The outer surface has approximately the same temperature as the heat medium due to solid heat transfer between the outer surface and the heat medium. The outer surface is arranged close to the culture medium or the plant. Thus, the temperature can be adjusted in a larger area around the culture medium and the plant. Compared with a system that adjusts the temperature locally such as at the root of a seedling, it can be applied to the growth of a wider variety of plants.

[0013] Alternatively, the one or more rows of cultivation beds may include a plurality of rows of cultivation beds; the temperature adjustment panel may be arranged between two rows of the plurality of rows of cultivation beds that are adjacent to each other in the bed width direction, or one row of cultivation beds may be arranged between two temperature adjustment panels in the bed width direction; the thickness direction of the temperature adjustment panel may be directed in the bed width direction, and the pair of main walls may extend in the bed length direction and the vertical direction.

[0014] Thus, the temperature is adjusted in a large area around the culture medium in the cultivation bed, thereby assisting the growth of a wide variety of plants.

[0015] The outer surface of at least one of the pair of main walls may have light diffusivity or light reflectivity.

[0016] Thus, the light diffused or reflected by the temperature control panel can be used to irradiate the plants, thereby promoting photosynthesis. In addition, light-sensitive insects can be kept away from the plants and the culture medium.

[0017] Alternatively, the temperature adjustment panel may constitute the bottom of the cultivation bed.

[0018] This makes it easy to adjust the temperature of the culture medium and can assist the growth of a wide variety of plants.

[0019] The temperature adjustment panel may include a storage portion for storing the liquid culture medium.

[0020] Thereby, the temperature of the liquid culture medium can be adjusted.

[0021] The temperature adjustment panel may include a vertical wall portion extending upward from one end of the housing portion and being close to the plant.

[0022] Thus, the temperature of the liquid culture medium can be adjusted by the storage portion, and the temperature around the plant extending upward from the culture medium can be adjusted by the vertical wall portion.

[0023] Alternatively, the temperature adjustment panel may include a gas flow path independently provided from the heat medium flow path and through which gas containing carbon dioxide flows; and an outlet for spraying the gas in the gas flow path toward the plants may be provided on the outer surface of at least one of the pair of main walls.

[0024] This can promote photosynthesis of plants.

[0025] The temperature adjustment panel may form a plurality of the heating medium flow paths extending parallel to each other.

[0026] This makes it easy to adjust the temperature over a wide range.

[0027] The plurality of heating medium flow paths may be arranged between the pair of main walls along the contour of the cross section of the main wall.

[0028] Thereby, the wall thickness can be reduced as much as possible and the outer surface area of ​​the pair of main walls can be increased.

[0029] Alternatively, the plurality of heating medium flow paths may extend in the longitudinal direction of the bed.

[0030] This allows the temperature to be adjusted over a wider range of the culture medium.

[0031] The plurality of heating medium flow paths may include one or more first heating medium flow paths through which the heating medium flows in one direction, and one or more second heating medium flow paths through which the heating medium flows in a direction opposite to the one direction.

[0032] This makes it easy to uniformly adjust the temperature in the bed length direction.

[0033] The first heating medium flow path and the second heating medium flow path may be arranged alternately along the cross section of the pair of main walls.

[0034] This makes it easy to uniformly adjust the temperature in the direction in which the heating medium flow paths are arranged.

[0035] The plurality of heating medium flow paths may extend in a direction intersecting the longitudinal direction of the bed.

[0036] This makes it easy to uniformly adjust the temperature in the bed length direction.

[0037] The temperature adjustment panel may include a main body having a hollow portion constituting the heating medium flow path and formed of an extruded material.

[0038] Thereby, a temperature adjustment panel can be provided in a simple manner.

[0039] Alternatively, the temperature adjustment panel further includes a pair of heads for sealing the opening of the hollow portion at respective ends of the extruded material; an inlet for allowing the heat carrier to flow into the heat carrier flow path and an outlet for allowing the heat carrier to flow out of the heat carrier flow path are provided in the pair of heads.

[0040] Thus, a temperature adjustment panel having a sealed heating medium flow path can be easily provided using an extruded material.

[0041] One method of the present disclosure provides a temperature adjustment panel for plant growth, which is a temperature adjustment panel used to assist the growth of plants planted in a culture medium, wherein the culture medium is contained in one or more rows of cultivation beds extending in the length direction of the bed; the aforementioned temperature adjustment panel for plant growth comprises a main body portion, the main body portion is formed into a panel shape with a wall thickness, and a heat medium flow path is formed inside the main body portion for circulating a heat medium with a higher or lower temperature than the ambient temperature; the aforementioned main body portion constitutes the bottom of the aforementioned cultivation bed, and the outer surface of one of a pair of main walls forms the inner bottom surface of the aforementioned cultivation bed.

[0042] This makes it easy to adjust the temperature of the culture medium and can assist the growth of a wide variety of plants.

[0043] Effects of the Invention

[0044] According to the present disclosure, it is possible to provide a temperature adjustment system that facilitates the growth of a wider variety of plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a perspective view of an agricultural greenhouse to which the temperature control system according to the first embodiment of the present invention is applied.

[0046] Figure 2 It is a perspective view of the temperature adjustment panel according to the first embodiment.

[0047] Figure 3 It is an exploded perspective view of the temperature adjustment panel according to the first embodiment.

[0048] Figure 4 It is a cross-sectional view of the temperature adjustment panel and the cultivation bed according to the first embodiment.

[0049] Figure 5 It is a longitudinal sectional view of the temperature adjustment panel according to the first embodiment.

[0050] Figure 6 This is a system diagram showing the flow of a heating medium in the temperature adjustment system according to the first embodiment.

[0051] Fig. 7A It is an exploded perspective view of a temperature adjustment panel according to a second embodiment of the present invention.

[0052] Figure 7B It is a longitudinal sectional view of the temperature adjustment panel according to the second embodiment.

[0053] Figure 7C This is a system diagram showing the flow of a heating medium in a temperature control system according to the second embodiment.

[0054] Fig. 8A It is an exploded perspective view of a temperature adjustment panel according to a third embodiment.

[0055] Figure 8B It is a longitudinal sectional view of the temperature adjustment panel according to the third embodiment.

[0056] Figure 8C This is a system diagram showing the flow of a heating medium in a temperature control system according to a third embodiment.

[0057] Fig. 9 This is a system diagram showing the flow of a heating medium in a temperature control system according to a fourth embodiment.

[0058] Fig.10 This is a system diagram showing the flow of a heating medium in a temperature control system according to a fifth embodiment.

[0059] Fig.11A It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the sixth embodiment.

[0060] Fig. 11B It is a cross-sectional view of the temperature adjustment panel and the cultivation bed according to the seventh embodiment.

[0061] Fig. 11C It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the eighth embodiment.

[0062] Fig. 12A It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to a ninth embodiment.

[0063] Fig. 12B It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to a tenth embodiment.

[0064] Fig.13A It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the eleventh embodiment.

[0065] Fig. 13B It is a cross-sectional view of the temperature adjustment panel and the cultivation bed according to the twelfth embodiment.

[0066] Fig.14A It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to a thirteenth embodiment.

[0067] Fig. 14B It is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to a fourteenth embodiment.

[0068] Fig.15A This is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to a fifteenth embodiment.

[0069] Fig. 15B This is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the sixteenth embodiment.

[0070] Fig.16A This is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the seventeenth embodiment.

[0071] Fig. 16B This is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the eighteenth embodiment.

[0072] Fig.17A This is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the nineteenth embodiment.

[0073] Fig. 17B This is a cross-sectional view of a temperature adjustment panel and a cultivation bed according to the 20th embodiment. DETAILED DESCRIPTION

[0074] Below, while referring to the attached Figure 1 Embodiments of the present invention will be described.

[0075] (First embodiment)

[0076] Reference Figure 1 The temperature control system 1 related to the first embodiment is used to assist the growth of the plant 2. The plant 2 is preferably a crop (agricultural crops such as fodder crops, horticultural crops and cash crops). The temperature control system 1 adjusts the ambient temperature of the plant 2 and the culture medium 3 for planting it. The temperature can be more effectively adjusted in a closed environment, and the temperature control system 1 is suitable for use in a closed environment such as an agricultural greenhouse 100. The plant 2 is also preferred as long as it is suitable for greenhouse cultivation. In this regard, general crops and horticultural crops are also preferred examples among agricultural crops. General crops include wheat, rice, potatoes and beans. Horticultural crops include vegetables, fruit trees and flowers. The culture medium 3 is the growth medium of the plant 2. The culture medium 3 is appropriately selected from soil, asbestos and culture solution, etc., considering the compatibility with the cultivated plant 2.

[0077] The agricultural greenhouse 100 is built on a substantially horizontal rectangular foundation. The agricultural greenhouse 100 has a body 101 formed of steel or aluminum extrusion. The entire body 101 is covered with an outer skin (not shown) formed of a light-transmitting material (e.g., polyvinyl chloride). Thus, the interior of the agricultural greenhouse 100 is protected from wind and rain.

[0078] The body 101 includes columns 102 erected at the four corners and the middle of the foundation, a pair of beams 103 horizontally mounted on the upper ends of the columns 102, a plurality of beams 104 horizontally mounted between the beams 103, and a roof truss 105 mounted on the beams 103 and the beams 104. The shape of the roof is not particularly limited, and may be, for example, a gable roof or an arch. The long sides of the foundation and the beams 103 are oriented north-south, and the short sides of the foundation and the beams 104 are oriented east-west. Hereinafter, the direction in which the beams 103 extend is referred to as the "beam direction", and the direction in which the beams 104 extend is referred to as the "beam direction".

[0079] The temperature control system 1 includes a plurality of rows of cultivation beds 10A, 10B, 10C and one or more temperature control panels 20A, 20B. The cultivation beds 10A, 10B, 10C and the temperature control panels 20A, 20B are arranged in an agricultural greenhouse 100. The number of rows of the cultivation beds 10A, 10B, 10C is not limited to three rows, and may be one row or multiple rows other than three rows.

[0080] Each cultivation bed 10A, 10B, 10C has an elongated rectangular shape in a plan view. Hereinafter, the longitudinal direction of the cultivation beds 10A, 10B, 10C is referred to as a "bed longitudinal direction", and the direction perpendicular to the bed longitudinal direction is referred to as a "bed width direction".

[0081] Each of the cultivation beds 10A, 10B, and 10C contains a culture medium 3. In the present embodiment, the culture medium 3 is soil. In each of the cultivation beds 10A, 10B, and 10C, a plurality of plants 2 are planted in the culture medium 3 at intervals in the longitudinal direction of the bed.

[0082] The cultivation bed 10A may have any structure as long as it can accommodate the required culture medium 3. Figure 4 As an example, a cultivation bed 10A includes a container body 11. The container body 11 has a bottom wall 12 and a peripheral wall 13 erected from the periphery of the bottom wall 12, and the bottom wall 12 and the peripheral wall 13 form a receiving portion 14 for receiving the culture medium 3. The receiving portion 14 is opened upward. The cultivation bed 10A is supported on the foundation of the agricultural greenhouse 100 via a leg 19 extending downward from the bottom wall 12. The culture medium 3 is received in the receiving portion 14 from above. The material of the cultivation bed 10A is not particularly limited. The same is true for the other cultivation beds 10B and 10C.

[0083] Each cultivation bed 10A, 10B, 10C is installed in the agricultural greenhouse 100 with the bed length direction facing the beam direction. The cultivation beds 10A, 10B, 10C in multiple rows extend parallel to each other and are arranged at intervals in the beam direction or the bed width direction.

[0084] Reference Figure 1 and Figure 2The temperature adjustment panels 20A and 20B have a wall thickness t20 (refer to Figure 4 In the present embodiment, the temperature adjustment panels 20A and 20B are flat rectangular panels and are independent from the cultivation beds 10A, 10B, and 10C.

[0085] In this case, the temperature adjustment panels 20A and 20B are arranged between two rows of the cultivation beds 10A, 10B, and 10C that are adjacent to each other in the bed width direction. The temperature adjustment panel 20A is arranged between the cultivation beds 10A and 10B, and the temperature adjustment panel 20B is arranged between the cultivation beds 10B and 10C. In other words, the cultivation bed 10B in the center is arranged between the two temperature adjustment panels 20A and 20B in the bed width direction.

[0086] The thickness direction of the temperature adjustment panels 20A and 20B is oriented in the bed width direction (beam direction). The panel length direction of the temperature adjustment panels 20A and 20B is oriented in the bed length direction (beam direction). The panel width direction of the temperature adjustment panels 20A and 20B is oriented in the vertical direction.

[0087] Reference Figure 2 to Figure 5 The structure of the temperature adjustment panel 20A will be described. Since the temperature adjustment panels 20A and 20B have the same structure as each other, the description of the temperature adjustment panel 20B will be omitted.

[0088] like Figure 2 and Figure 3 As shown, the temperature adjustment panel 20A includes a main body 25 and a pair of headers 26 and 27 (a first header 26 and a second header 27).

[0089] The main body 25 is an extruded material of a metal material, and the panel length direction is the extrusion direction. The metal material can be any material as long as it can be used for extrusion molding, and examples thereof include aluminum, aluminum alloy, silver, and copper alloy. In this embodiment, the main body 25 is made of aluminum alloy.

[0090] The main body 25 has a pair of main walls 31, 32, a pair of end walls 33, 34 and a plurality of partition walls 35. The main walls 31, 32 are opposed to each other in the thickness direction of the temperature adjustment panels 20A, 20B. Each main wall 31, 32 is rectangular in side view and extends in the panel length direction and the panel width direction orthogonal to the panel length direction and the thickness direction. In addition, the wall thickness t20 is the interval between the outer surfaces of the pair of main walls 31, 32.

[0091] The end walls 33 and 34 extend in the length direction and thickness direction of the panel. The end wall 33 connects one end of the pair of main walls 31 and 32 to each other in the width direction of the panel, and the end wall 34 connects the other end of the pair of main walls 31 and 32 to each other. The main body 25 forms a hollow portion 36 surrounded by the main walls 31 and 32 and the end walls 33 and 34. The hollow portion 36 opens at both ends of the main body 25 in the length direction of the panel.

[0092] A plurality of partition walls 35 are arranged in the hollow portion 36 at intervals in the panel width direction, and extend parallel to each other in the panel length direction. Each partition wall 35 is joined to the inner surface of the main wall 31 at one end in the thickness direction, and is joined to the inner surface of the main wall 32 at the other end in the thickness direction. The plurality of partition walls 35 divide the hollow portion 36 into a plurality of long holes 36a to 36g arranged in the panel width direction. That is, the main body 25 is composed of an extruded material having a multi-chamber structure. Each long hole 36a to 36g is defined by the inner surfaces of a pair of main walls 31 and 32, a pair of end walls 33 and 34, and the inner surfaces of two adjacent ones of the plurality of partition walls 35. The number of the long holes 36a to 36g is one more than the number of the partition walls 35. In this example, the number of the long holes 36a to 36g is seven, but it can be changed appropriately.

[0093] like Figure 4 As shown, the main walls 31 and 32 form a profile longer than the wall thickness t20 in the cross section (the cross section orthogonal to the length direction of the panel). In the present embodiment, the main walls 31 and 32 are flat plates, and the main body 25 is a flat rectangular panel. In the cross section, the profile of the main walls 31 and 32 is linear. If the thickness of the main walls 31 and 32 is taken into consideration and expressed more strictly in two dimensions, the profile is an elongated rectangular shape. The so-called length of the profile compared with the wall thickness t20 can be defined as the total length of the profile or as the distance from one end to the other end of the profile in the width direction of the panel. In the present embodiment, since the profile is a straight line extending in a direction orthogonal to the thickness direction, it is the same in either definition.

[0094] Thus, the outline of the main walls 31 and 32 is longer than the wall thickness t20. That is, the main walls 31 and 32 and thus the temperature adjustment panel 20A are longer in the panel width direction relative to the thickness direction, and the temperature adjustment panel 20A is more like a wall or panel than a round tube or a square tube. The aspect ratio of the cross section of the main body 25 is a value that is greatly different from 1. In addition, the length of the main walls 31 and 32 in the panel length direction is longer than the length of the outline in the cross section of the main walls 31 and 32.

[0095] like Figure 3 and Figure 5As shown, the first head 26 is mounted on one end of the main body 25 in the panel length direction to close the opening of one end of the hollow part 36. The second head 27 is mounted on the other end of the main body 25 in the panel length direction to close the opening of the other end of the hollow part 36.

[0096] The first head 26 has a cover plate 41, a peripheral wall 42 erected from the peripheral edge of the cover plate 41, and a recess 43 surrounded by the cover plate 41 and the peripheral wall 42, and the recess 43 is open on the opposite side of the cover plate 41. The cross section of the recess 43 (the cross section of the inner peripheral surface of the peripheral wall 42) has the same shape as the cross section of the outer peripheral surface of the main body 25 (a rectangular shape in this embodiment). The first head 26 is externally embedded in one end of the main body 25 and is liquid-tightly joined to the main body 25. When assembled to the main body 25, the inner surface of the cover plate 41 is in surface contact with the rectangular window frame-shaped end surface of one end of the main body 25. The second head 27 is also constructed in the same manner as the first head 26, and is assembled at the other end of the main body 25 in the panel length direction in the same manner as the first head 26.

[0097] In the present embodiment, one end of all the partition walls 35 in the panel length direction is offset to the inside of the main body 25 relative to the end surface of one end of the main body 25 in surface contact with the cover plate 41. Therefore, all the long holes 36a to 36g are opened inside the main body 25 at one end side. The long holes 36a to 36g are connected to each other via the connecting portion 37 extending in the panel width direction in the main body 25 between the opening of the main body 25 and the long holes 36a to 36g. The same is true for the other end in the panel length direction.

[0098] The temperature adjustment panel 20A has a heat medium flow path 51 formed therein through which a heat medium having a higher or lower temperature than the ambient temperature flows. The ambient temperature is the temperature of the environment in which the plant 2 is placed. In the present embodiment, as an example, the ambient temperature is the temperature of a portion in the agricultural greenhouse 100 that is a predetermined distance away from the cultivation beds 10A, 10B, 10C in the beam direction, that is, a portion that is sufficiently away from the area where the temperature can be adjusted by the temperature adjustment panels 20A, 20B. The heat medium may be any substance as long as it can perform heat exchange, for example, it may be water or an antifreeze solution with ethylene glycol as the main component.

[0099] The temperature adjustment panel 20A has an inlet 52 for allowing the heat medium to flow into the heat medium flow path 51 and an outlet 53 for allowing the heat medium to flow out of the heat medium flow path. In the present embodiment, a single inlet 52 is provided on the cover plate 41 of the first head 26, and a single outlet 53 is provided on the cover plate 41 of the second head 27. The inlet 52 and the outlet 53 are arranged at ends on opposite sides of each other in the panel width direction. In the present embodiment, the panel width direction is oriented in the vertical direction in the agricultural greenhouse 100. The temperature adjustment panel 20A is arranged in the agricultural greenhouse 100 in a posture in which the inlet 52 is on the lower side and the outlet 53 is on the upper side. At the inlet 52 and the outlet 53, pipe joints for connecting a hose (not shown) for the flow of the heat medium are fixed.

[0100] The heat medium flows into the communication portion 37 at one end through the inlet 52 and flows into the plurality of long holes 36a to 36g from the communication portion 37. The heat medium flows into the communication portion 37 at the other end through the long holes 36a to 36g and flows out of the temperature adjustment panel 20A through the outlet 53.

[0101] Thus, the heat medium flow path 51 is composed of the connecting portion 37 at one end, the plurality of long holes 36a to 36g, and the connecting portion 37 at the other end. The plurality of long holes 36a to 36g constitute a plurality of independent heat medium flow paths 51a extending in the panel length direction in the temperature adjustment panel 20A. The connecting portion 37 at one end functions as a distribution flow path 51b for distributing heat medium to each of the plurality of independent heat medium flow paths 51a. The connecting portion 37 at the other end functions as a recovery flow path 51c for recovering heat medium from each of the plurality of independent heat medium flow paths 51a.

[0102] In this embodiment, all the long holes 36a to 36g constitute the independent heating medium flow path 51a. In addition, in all the long holes 36a to 36g, the heating medium flows in the same direction from one side to the other side in the longitudinal direction of the panel.

[0103] Reference Figure 6 The temperature control system 1 includes a heat medium temperature management unit 60. The heat medium temperature management unit 60 includes a tank 61, a pump 62, a heater 63, a cooler 64 and a controller 80. The tank 61 stores the heat medium. The outlet of the tank 61 is connected to the suction port of the pump 62. The pump 62 pressure-feeds the heat medium in the tank 61 from its outlet. The tank 61 and the pump 62 can be arranged inside the agricultural greenhouse 100 or outside it.

[0104] The discharge port of the pump 62 is connected to the inlet of the tank 61 via the heating line 71. The heater 63 is provided on the heating line 71. The heater 63 is, for example, a solar panel installed on the beam 104 of the agricultural greenhouse 100, and heats the heat medium flowing in the heating line 71 with solar heat.

[0105] The discharge port of the pump 62 is connected in parallel to the inlet 52 of the temperature adjustment panels 20A and 20B via the supply line 72. The outflow port 53 of the temperature adjustment panels 20A and 20B is connected in parallel to the inlet of the tank 61 via the return line 73.

[0106] The return line 73 is provided with a cooling line 74 as a bypass. The cooler 64 is provided on the cooling line 74. The cooler 64 is, for example, a heat exchanger buried underground (for example, at a depth of 20 m) in the foundation of the agricultural greenhouse 100 or in an adjacent area.

[0107] In the present embodiment, the discharge port of the pump 62 is connected to the inlet of the first three-way valve 65a, and the line from the pump 62 to the first three-way valve 65a serves as both the heating line 71 and the supply line 72. The heating line 71 is separated from the supply line 72 from the first three-way valve 65a and extends to the heater 63, and the supply line 72 is separated from the supply line 72 from the first three-way valve 65a and extends to the temperature adjustment panels 20A and 20B. The first three-way valve 65a is switched between a heating state in which the discharge port is connected to the heating line 71 and a supply state in which the discharge port is connected to the supply line 72.

[0108] The return line 73 is provided with a second three-way valve 65b. The cooling line 74 extends from the second three-way valve 65b and terminates at a portion of the return line 73 that is downstream of the second three-way valve 65b. The second three-way valve 65b is switched between a direct connection state in which the outlet 53 of the temperature adjustment panel 20A, 20B is connected to the inlet of the tank 61 without passing through the cooler 64, and a cooling state in which the outlet 53 is connected to the inlet of the tank 61 via the cooler 64. Check valves 66a, 66b are provided before the confluence point of the cooling line 74 and the return line 73, respectively, so that the heat medium from the cooling line 74 does not flow back in the return line 73 or the heat medium from the return line 73 does not flow back in the cooling line 74.

[0109] The downstream end of the heating line 71 and the downstream end of the return line 73 are joined together to form a common line 75 connected to the inlet of the tank 61. Check valves 66c and 66d are provided before the joining point of the heating line 71 and the return line 73, respectively, so that the heating medium does not flow from the heating line 71 to the return line 73 or in the reverse direction.

[0110] The first three-way valve 65a and the second three-way valve 65b are electromagnetic valves. The controller 80 switches the states of the first three-way valve 65a and the second three-way valve 65b based on information required for control such as ambient temperature and time. Thus, the flow and temperature management of the heat medium are automated. The controller 80 is set on an operating panel (not shown) set in the agricultural greenhouse 100.

[0111] As just one example, during the daytime in winter, the controller 80 switches the first three-way valve 65a to a heating state. The state of the second three-way valve 65b is not particularly limited. The heat medium in the tank 61 circulates in the heating line 71 and returns to the tank 61. In this process, the heat medium is heated by solar heat in the heater 63. During the night in winter, the heat medium that was heated during the day is stored in the tank 61. The controller 80 switches the first three-way valve 65a to a supply state and switches the second three-way valve 65b to a direct connection state. The heat medium in the tank 61 is supplied to the temperature adjustment panels 20A and 20B via the supply line 72, circulates in the heat medium flow path 51 in the temperature adjustment panels 20A and 20B, and returns to the tank 61 via the return line 73 without passing through the cooler 64.

[0112] In summer, regardless of day or night, the controller 80 switches the first three-way valve 65a to the supply state and the second three-way valve 65b to the cooling state. The heat medium in the tank 61 is supplied to the temperature adjustment panels 20A and 20B via the supply line 72, flows through the heat medium flow path 51 in the temperature adjustment panels 20A and 20B, and flows through the return line 73. In this process, the heat medium flows through the cooling line 74 and is cooled by the cooler 64, and the cooled heat medium is sent back to the tank 61.

[0113] Return to Figure 4 When a high-temperature heat medium is supplied to the temperature adjustment panels 20A and 20B at night in winter, the heat medium flows into each temperature adjustment panel 20A and 20B from the bottom and flows out from the top. If the inlet 52 and the outlet 53 are arranged in this way, the heat medium is supplied to each of the plurality of independent heat medium flow paths 51a without omission. It is possible to suppress the accumulation of air in the heat medium flow path 51, and the temperature can be effectively adjusted by the temperature adjustment panels 20A and 20B.

[0114] The heat medium flows in the heat medium flow path 51 along the length direction of the panel, i.e., the length direction of the bed. The outer surfaces of the pair of main walls 31, 32 of the temperature adjustment panels 20A, 20B are close to and opposite to the cultivation bed 10 and the plants 2 extending upward therefrom in the panel width direction or the bed width direction. The pair of main walls 31, 32 are heated by heat conduction from the heat medium, and thereby the peripheral area of ​​the outer surface is heated. The culture medium 3 and the plants 2 exist in the peripheral area, i.e., within the range in which the temperature can be adjusted by the temperature adjustment panels 20A, 20B. Figure 4In the cross section shown, the outer surface profile of the pair of main walls 31, 32 is longer than the wall thickness t20, and the profile extends in the vertical direction when the temperature adjustment panels 20A, 20B are set. The range in which the temperature can be adjusted is expanded in the vertical direction compared to the water pipe, and the surroundings of the plant 2 and the culture medium 3 are kept at an appropriate temperature over a wider range. The same is true when excessive temperature rise around the plant 2 and the culture medium 3 is suppressed in summer. As a result, the growth promotion of a wider variety of plants 2 can be assisted.

[0115] The outer surface of the temperature adjustment panel 20A, 20B has light diffusion or light reflection. In order to obtain light diffusion or light reflection, as an example, the outer surface can be painted white or can be left unpainted and in a spotless state. The outer surface diffuses or reflects the solar energy that passes through the outer skin of the agricultural greenhouse 100, and the diffused light or reflected light is irradiated on the plant 2 or the culture medium 3. In this way, pests that are afraid of light can be kept away from the plant 2 and the culture medium 3, and the growth of the plant 2 can be promoted. In addition, by directing light toward the plant 2, the photosynthesis of the plant 2 is promoted.

[0116] (Second embodiment)

[0117] Next, refer to Figure 7A to Figure 7C The second embodiment of the present invention will be described with the difference from the above embodiment as the center. In this embodiment, since the temperature adjustment panels 20A and 20B have the same structure, the description of the temperature adjustment panel 20B is omitted.

[0118] One long hole 36d among the seven long holes 36a to 36g constitutes a gas flow path 56 for circulating a gas containing carbon dioxide. The remaining long holes 36a to 36c and 36e to 36g constitute an independent heating medium flow path 51a. The long hole 36d is arranged at the center among the seven long holes 36a to 36g.

[0119] With respect to the two partitions 35C and 35D defining the long hole 36d, one end in the longitudinal direction of the panel is flush with the end surface of one end of the main body 25 in surface contact with the cover plate 41. With respect to the other partitions 35, it is the same as the first embodiment. The long holes 36a to 36c are connected to each other via a one-side connecting portion 37a extending in the panel width direction in the main body 25 between the opening of the main body 25 and the long holes 36a to 36c. The long holes 36e to 36g are connected to each other via a other-side connecting portion 37b extending in the panel width direction in the main body 25 between the opening of the main body 25 and the long holes 36e to 36g. The other end in the longitudinal direction of the panel is the same.

[0120] With respect to the two partitions 35C and 35D defining the long hole 36d, one end in the longitudinal direction of the panel is flush with the end surface of one end of the main body 25 in surface contact with the cover plate 41. With respect to the other partitions 35, it is the same as the first embodiment. The long holes 36a to 36c are connected to each other via a one-side connecting portion 37a extending in the panel width direction in the main body 25 between the opening of the main body 25 and the long holes 36a to 36c. The long holes 36e to 36g are connected to each other via a other-side connecting portion 37b extending in the panel width direction in the main body 25 between the opening of the main body 25 and the long holes 36e to 36g. The other end in the longitudinal direction of the panel is the same.

[0121] The pair of main walls 31 and 32 are provided with a plurality of ejection ports 38 (the ejection ports 38 of the main wall 31 refer to FIG. 3 ) which communicate the long hole 36d, that is, the gas flow path 56 with the outside. Fig. 7A The ejection port 38 of the main wall 32 refers to Figure 7B The plurality of ejection ports 38 are arranged at intervals from each other in the extending direction of the gas flow path 56, that is, in the longitudinal direction of the panel.

[0122] The first head 26 is provided with two inlets 52a, 52b and one gas inlet 57. The second head 27 is provided with two outlets 53a, 53b. When the pair of heads 26, 27 are mounted on the main body 25, the partitions 35C, 35D abut against the inner surface of the cover plate 41. Thus, the central long hole 36d is connected to the gas inlet 57 and the ejection port 38, while being isolated from the other long holes 36a to 36c, 36e to 36g, the inlets 52a, 52b and the outlets 53a, 53b.

[0123] The first inlet 52a is connected to the first outlet 53a via the one-side communication portion 37a of the first head 26, the three long holes 36a to 36c, and the one-side communication portion 37a of the second head 27. The second inlet 52b is connected to the second outlet 53b via the one-side communication portion 37a of the first head 26, the three long holes 36e to 36g, and the one-side communication portion 37a of the second head 27. The communication portions 37a and 37b of the first head 26 constitute the distribution flow path 51b, the long holes 36a to 36c and 36d to 36e constitute the independent heat medium flow path 51a, and the communication portions 37a and 37b of the second head 27 constitute the recovery flow path 51c. The first inlet 52a is arranged on the lower side relative to the first outlet 53a, and the second inlet 52b is arranged on the lower side relative to the second outlet 53b. In the independent heating medium flow paths 51a, the heating medium flows in the same direction. Thus, similarly to the first embodiment, the surroundings of the plant 2 and the culture medium 3 can be maintained at an appropriate temperature over a wide range.

[0124] The gas inlet 57 is connected to the gas supply source 81 via the gas supply line 82. The gas supply source 81 may be a tank storing high-pressure gas containing carbon dioxide, or a pump or compressor that pressurizes air. The gas containing carbon dioxide is introduced into the gas flow path 56 of the temperature adjustment panels 20A and 20B via the gas supply line 82 and the gas inlet 57. The introduced gas is ejected toward the plant 2 from the plurality of ejection ports 38. Thus, the photosynthesis of the plant 2 is promoted.

[0125] (Third embodiment)

[0126] Next, refer to Figure 8A to Figure 8C The third embodiment of the present invention will be described with the differences from the above-mentioned embodiment as the center. In this embodiment, since the temperature adjustment panels 20A and 20B have the same structure, the description of the temperature adjustment panel 20B is omitted.

[0127] In this embodiment, one end of all the partition walls 35 in the panel length direction is flush with the end surface of one end of the main body 25 that contacts the cover plate 41. Therefore, in the main body 25, there is no connecting portion 37 (see FIG. 1 ) as in the first embodiment. Figure 3 and Figure 5 ), the one-side communication portion 37a and the other-side communication portion 37b in the second embodiment (see Fig. 7A and Figure 7B The same is true for the other end of the panel in the longitudinal direction.

[0128] When the pair of heads 26 and 27 are mounted on the main body 25, all the partition walls 35 abut against the inner surface of the cover plate 41. Thus, the seven long holes 36a to 36g are isolated from each other, and flow paths independent of each other are formed.

[0129] The first head 26 is provided with three inlets 52a, 52c, and 52f, three outlets 53b, 53e, and 53g, and a gas inlet 57. The second head 27 is provided with three inlets 52b, 52e, and 52g and three outlets 53a, 53c, and 53f. The gas inlet 57 is connected to the long hole 36d as in the second embodiment, and the long hole 36d constitutes the gas flow path 56.

[0130] The long hole 36a is connected to the inlet 52a and the outlet 52b. The long hole 36a constitutes the first independent heating medium flow path 51a1 that allows the heating medium to flow from one side to the other side in the length direction of the panel. The long hole 36b is connected to the inlet 52b and the outlet 53b. The long hole 36b constitutes the second independent heating medium flow path 51a2 that allows the heating medium to flow from the other side to one side in the length direction of the panel. The long holes 36c and 36f constitute the first independent heating medium flow path 51a1. The long holes 36d and 36g constitute the second independent heating medium flow path 51a2. The first independent heating medium flow path 51a1 and the second independent heating medium flow path 51a2 are arranged alternately in the width direction of the panel.

[0131] In the process of the heat medium flowing through the independent heat medium flow path, the temperature of the heat medium may change due to heat exchange with the internal air of the agricultural greenhouse 100. In this embodiment, since the first independent heat medium flow path 51a1 that allows the heat medium to flow from one side to the other side and the second independent heat medium flow path 51a2 that allows the heat medium to flow from the other side to one side are mixed in the temperature adjustment panels 20A and 20B, the temperature around one side of the temperature adjustment panel 20A and the temperature around the other side can be made uniform. Since the first independent heat medium flow path 51a1 and the second independent heat medium flow path 51a2 are arranged alternately, the temperature can also be made uniform in the vertical direction.

[0132] (Fourth embodiment)

[0133] Next, refer to Fig. 9 The fourth embodiment of the present invention will be described with the difference from the above-mentioned embodiment as the center. In this embodiment, since the temperature adjustment panels 20A and 20B have the same structure, the description of the temperature adjustment panel 20B is omitted.

[0134] The temperature adjustment panel 20A may also include a plurality of main bodies 25 arranged in the longitudinal direction of the panel. In this case, the temperature adjustment panel 20A includes one or more intermediate headers 28 that connect the main bodies 25 to each other. In the illustrated example, since there are two main bodies 25, there is one intermediate header 28, but if there are three or more main bodies 25, a plurality of intermediate headers 28 are provided in the temperature adjustment panel 20A. The intermediate header 28 has a shape such that the cover plate 41 of the second header 27 is bonded back to back to the cover plate 41 of the first header 26. One side of the panel in the longitudinal direction has the same structure as the second header 27, and the other side of the panel in the longitudinal direction has the same structure as the first header 26. The inlet 52 and the outlet 53 are provided on the peripheral wall 42 instead of the cover plate 41.

[0135] Thus, even when the cultivation beds 10A, 10B, 10C are long in the bed length direction, it is possible to provide long temperature adjustment panels 20A, 20B corresponding thereto.

[0136] In the example shown in the figure, the gas flow path 56 (see FIG. Fig. 7A and Fig. 8A ), but the gas flow path 56 can also be applied in this embodiment. In the example shown in the figure, the independent heating medium flow path 51a allows the heating medium to flow from one side to the other side, but in this embodiment, the first independent heating medium flow path 51a1 and the second independent heating medium flow path 51a2 (see Figure 8B ).

[0137] (Fifth embodiment)

[0138] Next, refer to Fig.10 The fifth embodiment of the present invention will be described with the focus on the differences from the above-mentioned embodiment. In this embodiment, since the temperature adjustment panels 20A and 20B have the same structure, the description of the temperature adjustment panel 20B is omitted.

[0139] In this embodiment, a row of temperature control panels 20A adjacent to the cultivation bed 10A is formed by arranging a plurality of temperature control panels 20A1 and 20A2 in the bed length direction. Thus, as in the fourth embodiment, a long temperature control panel 20A can be provided corresponding to the long cultivation beds 10A, 10B, and 10C.

[0140] In this embodiment, the independent heating medium flow paths 51a in each temperature adjustment panel 20A1, 20A2 are oriented in the up-down direction. Thus, the temperature around one side of the temperature adjustment panel 20A and the temperature around the other side can be made uniform. All independent heating medium flow paths 51a allow the heating medium to flow from bottom to top. Thus, it is possible to suppress the accumulation of air in the heating medium flow paths 51.

[0141] In the example shown in the figure, when a row of temperature adjustment panels 20A is divided into a plurality of panels 20A1 and 20A2, the independent heating medium flow paths 51a are oriented in the vertical direction. However, the independent heating medium flow paths 51a may be oriented in the bed length direction as in the first to fourth embodiments.

[0142] In the example shown in the figure, when a row of temperature adjustment panels 20A is divided into a plurality of panels, the independent heating medium flow path 51a is oriented in the vertical direction, but the independent heating medium flow path 51a may also be oriented in the bed length direction as in the first to fourth embodiments. Fig. 7A and Fig. 8A), it is also possible to set the first independent heating medium flow path 51a1 and the second independent heating medium flow path 51a2 (refer to Figure 8B ).

[0143] (Sixth Implementation Method)

[0144] Next, refer to Fig.11A , focusing on the differences from the above-mentioned embodiments, the sixth embodiment of the present invention is described.

[0145] In the above-described embodiment, the temperature adjustment panel 20A is provided adjacent to the cultivating bed 10A, but in the present embodiment to the twentieth embodiment, the temperature adjustment panel 120A constitutes a part of the cultivating bed 10A.

[0146] In this embodiment, the temperature adjustment panel 20A constitutes the bottom of the cultivation bed 10A. The temperature adjustment panel 20A is supported on the foundation of the agricultural greenhouse 100 via the legs 19 in a posture with the pair of main walls 31 and 32 facing upward or downward. The container body 11 of the cultivation bed 10A is placed on the upper surface of the main wall 31. In this way, the temperature adjustment panel 20A functions as a pedestal for placing the container body 11.

[0147] Thus, the temperature of the bottom wall 12 of the container body 11 is adjusted by solid heat transfer. In addition, the temperature of the peripheral wall 13 of the container body 11 is also adjusted by the temperature adjustment panel 20A. Thus, the temperature of the culture medium 3 accommodated in the container body 11 can be widely adjusted.

[0148] (Seventh Implementation Method)

[0149] Next, refer to Fig. 11B , focusing on the differences from the above-mentioned embodiments, the 7th embodiment of the present invention is described.

[0150] In this embodiment, the container body 11 has a W-shaped cross section as a whole, and has an inverted V-shaped partition 15 in the center of the width direction. The two receiving parts 14 are arranged in the width direction via the partition 15. The culture medium 3 is respectively received in the two receiving parts 14. The temperature adjustment panel 20A functions as a base for placing the container body 11, similarly to the sixth embodiment.

[0151] The partition wall 15 has a recess 15a extending upward from the lower surface. The temperature adjustment panel 20A has fins 39 protruding from the main wall 31, and the fins 39 are inserted into the recess 15a. Thus, even if the container body 11 has the partition wall 15, the temperature of the partition wall 15 can be adjusted by the fins 39.

[0152] (Eighth Implementation Method)

[0153] Next, refer to Fig. 11C, focusing on the differences from the above-mentioned embodiments, the 8th embodiment of the present invention is described.

[0154] In the above embodiment, the long holes 36a to 36g are arranged linearly in the panel width direction, but in the present embodiment, the central long hole 36d is offset in the thickness direction relative to the other long holes 36a to 36c and 36e to 36g. Therefore, the main walls 31 and 32 are not flat, and the portion defining the long hole 36d has a step in the thickness direction. Thus, the step portion can be inserted into the recess 15a. Therefore, the temperature of the partition wall portion 15 can be adjusted as in the sixth embodiment.

[0155] (Ninth Implementation Method)

[0156] Next, refer to Fig. 12A , focusing on the differences from the above-mentioned embodiments, the 9th embodiment of the present invention is described.

[0157] The temperature adjustment panel 20A is formed into a U-shaped cross-section and is supported on the foundation of the agricultural greenhouse 100 via the legs 19. In the cross section, the contour of the outer surface of a pair of main walls 31 and 32 is not a straight line or an elongated rectangular shape as in the first to seventh embodiments. The contour can be curved as long as it is convex downward, or it can be composed of multiple steps as shown in the example. In the present embodiment, the contour is also long relative to the wall thickness t20. The cultivation bed 10A is accommodated in the temperature adjustment panel 20A. As a result, not only the bottom wall 12 of the container body 11, but also the surrounding wall 13 is opposite to the outer surface of the main wall 31 in the bed width direction. Therefore, compared with the sixth embodiment, it is easier to adjust the temperature of the culture medium 3.

[0158] (10th embodiment)

[0159] Next, refer to Fig. 12B , focusing on the differences from the above-mentioned embodiments, the 10th embodiment of the present invention is described.

[0160] The temperature adjustment panel 20A has a U-shaped cross section and includes a bottom wall 20a and a pair of side walls 20b protruding upward from both ends of the bottom wall 20a. The temperature adjustment panel 20A includes a plurality of fins 39 protruding from the inner peripheral surfaces of the bottom wall 20a and the side walls 20b.

[0161] The culture medium 3 is asbestos as an example. Asbestos is different from soil and culture solution, and has a high ability to maintain its shape without collapsing. It is not necessary for the cultivation bed 10A to have a container body 11 as in the above-mentioned embodiment. The fins 39 help stabilize the position of such exposed asbestos relative to the temperature adjustment panel 20A. That is, the fins 39 protruding from the inner surface of the side wall portion 20b stabilize the position of the asbestos relative to the panel width direction. In addition, a part of the fins 39 protruding from the inner surface of the bottom wall portion 20a can also stabilize the position of the asbestos relative to the panel width direction. A part of the fins 39 protruding from the inner surface of the bottom wall portion 20a can also be inserted into the asbestos from below, thereby making the position of the asbestos relative to the temperature adjustment panel 20A more stable.

[0162] Since the culture medium 3 is surrounded by the side wall portion, it is easy to adjust the temperature of the culture medium 3. In addition, since the fins 39 are close to, in contact with, or immersed in the asbestos, it is easier to adjust the temperature of the culture medium 3.

[0163] (11th embodiment)

[0164] Next, refer to Fig.13A , focusing on the differences from the above-mentioned embodiments, the 11th embodiment of the present invention is described.

[0165] In this embodiment, the cross-sectional structure of the temperature adjustment panel 20A is similar to that of the ninth embodiment (see Fig. 12A The culture medium 3 uses a culture liquid, and the temperature adjustment panel 20A functions as a storage portion 14 for storing the liquid culture medium 3 rather than a base for supporting the container body 11.

[0166] In this case, although not shown in detail, the heads 26 and 27 of the temperature control panel 20A have blocking plates for blocking the longitudinal ends of the storage section 14 to prevent leakage of the culture solution. In addition, a system for circulating the culture solution is added to the temperature control system 1 to control the water quality and temperature of the culture solution.

[0167] In this embodiment, the temperature of the culture medium 3 can also be adjusted. The outer surface of the main wall 31 facing the culture medium 3 can also be subjected to an anti-corrosion surface treatment. In this way, the temperature adjustment panel 20A can be prevented from being corroded by the culture medium 3, and the material of the temperature adjustment panel 20A can be prevented from being eluted into the culture medium 3.

[0168] The main body 25 of the temperature adjustment panel 20A is made of an extruded material having a plurality of long holes. The liquid level of the culture medium 3 is at approximately the same height as the partition wall of the pair of long holes arranged at the upper end. Therefore, the long holes at the upper end constitute the gas flow path 56, and the remaining long holes arranged below constitute the independent heat medium flow path 51a. Thus, it is possible to simultaneously achieve the promotion of photosynthesis by the gas ejected to the plant 2 and the temperature adjustment of the liquid culture medium 3.

[0169] (12th embodiment)

[0170] Next, refer to Fig. 13B , focusing on the differences from the above-mentioned embodiments, the twelfth embodiment of the present invention is described.

[0171] In this embodiment, the cross-sectional structure of the temperature adjustment panel 20A is similar to that of the tenth embodiment (see Fig. 12B ) is the same. In the culture medium 3, a culture solution is used in the same manner as in the eleventh embodiment. The bottom wall portion 20a and the pair of side wall portions 20b function as a receiving portion 14 for receiving the culture medium 3. Thus, the temperature of the liquid culture medium 3 can be adjusted in the same manner as in the tenth and eleventh embodiments.

[0172] (13th embodiment)

[0173] Next, refer to Fig.14A , focusing on the differences from the above-mentioned embodiments, the 13th embodiment of the present invention is described.

[0174] In this embodiment, as in the tenth embodiment, the culture medium 3 as the culture solution is accommodated in the temperature adjustment panel 20A. The temperature adjustment panel 20A has a receiving portion 14 having a U-shaped cross section for accommodating the culture medium 3 and a vertical wall portion 16 extending upward from the upper end of one side of the receiving portion 14, and is formed as a whole in a J-shaped cross section. The vertical wall portion 16 is close to and opposite to the plant 2 extending upward from the culture medium 3. Thus, the temperature of the liquid culture medium 3 can be adjusted by the receiving portion 14, and the temperature around the plant 2 extending upward from the culture medium 3 can be adjusted by the vertical wall portion 16. The growth of the plant 2 cultivated with the culture solution can be further promoted.

[0175] (14th embodiment)

[0176] Next, refer to Fig. 14B , focusing on the differences from the above-mentioned embodiments, the 14th embodiment of the present invention is described.

[0177] In this embodiment, similarly to the thirteenth embodiment, the temperature adjustment panel 20A has the housing portion 14 and the vertical wall portion 16. The temperature adjustment panel 20A has fins 39 protruding from the inner surface (the surface facing the plant 2) of the vertical wall portion 16. This makes it easier to adjust the temperature around the plant 2.

[0178] (15th embodiment)

[0179] Next, refer to Fig.15A , focusing on the differences from the above-mentioned embodiments, the 15th embodiment of the present invention is described.

[0180] In this embodiment, similarly to the 14th embodiment, the temperature adjustment panel 20A includes a housing portion 14, a vertical wall portion 16, and fins 39. The housing portion 14 is formed with an independent heat medium flow path 51a, whereas the vertical wall portion 16 does not have a hollow structure but is plate-shaped. The fins 39 protrude from such a vertical wall portion 16. In this embodiment, it is also easy to adjust the temperature of the culture medium 3 and the surroundings of the plant 2. In addition, the culture medium 3 may be either soil or a culture solution.

[0181] (16th Implementation Method)

[0182] Next, refer to Fig. 15B , focusing on the differences from the above-mentioned embodiments, the 16th embodiment of the present invention is described.

[0183] In this embodiment, similarly to the fifteenth embodiment, the temperature adjustment panel 20A includes a housing portion 14, a vertical wall portion 16, and fins 39. The housing portion 14 forms an independent heat medium flow path 51a in its central portion, and is plate-shaped at both ends in the width direction. In this embodiment, it is also easy to adjust the temperature of the culture medium 3 and the surroundings of the plant 2. In addition, the culture medium 3 may be either soil or a culture solution.

[0184] (17th Implementation Method)

[0185] Next, refer to Fig.16A , focusing on the differences from the above-mentioned embodiments, the 17th embodiment of the present invention is described.

[0186] The temperature adjustment panel 20A has a receiving portion 14 for receiving the culture medium 3, similarly to the 11th embodiment or the 12th embodiment. In this embodiment, the receiving portion 14 is paired in the width direction. A pair of receiving portions 14 are connected and integrated in the width direction. Thus, while adopting a structure capable of adjusting the temperature of the culture medium 3, it is easy to increase the planting area in the agricultural greenhouse 100.

[0187] (Eighteenth Implementation Method)

[0188] Next, refer to Fig. 16B , focusing on the differences from the above-mentioned embodiments, the 18th embodiment of the present invention is described.

[0189] The temperature adjustment panel 20A has a pair of receiving parts 14 in the same manner as the 17th embodiment. Both ends of the receiving part 14 in the width direction are plate-shaped in the same manner as the 16th embodiment. In this embodiment, there is a connecting wall 17 that connects the central parts in the vertical direction of the receiving part 14. As a result, the section modulus becomes larger in the area between the pair of receiving parts 14, and the strength can be ensured.

[0190] (19th Implementation Method)

[0191] Next, refer to Fig.17A , focusing on the differences from the above-mentioned embodiments, the 19th embodiment of the present invention is described.

[0192] The temperature adjustment panel 20A has a pair of storage parts 14 similarly to the 17th embodiment. The temperature adjustment panel 20A further has a vertical wall part 16 protruding upward from the connection part of the pair of storage parts 14. Thus, the temperature around the plant 2 in the culture medium 3 planted in the pair of storage parts 14 can be adjusted.

[0193] (Implementation 20)

[0194] Next, refer to Fig. 17B , focusing on the differences from the above-mentioned embodiments, the 20th embodiment of the present invention is described.

[0195] The temperature adjustment panel 20A has a pair of housing portions 14 similarly to the eighteenth embodiment, and has a vertical wall portion 16 similarly to the nineteenth embodiment. In this embodiment as well, the temperature around the plant 2 can be adjusted similarly to the nineteenth embodiment.

[0196] Although the embodiments of the present invention have been described above, the above-described configurations can be appropriately added, changed, or removed within the scope of the gist of the present invention.

[0197] For example, the forming method of the main body 25 is not particularly limited. In the present embodiment, the main body 25 is formed of an extruded material as an example, but it can also be formed of a single plate by roll forming. If extrusion forming is used, the main body 25 having the above structure can be easily manufactured.

[0198] In addition, the tanks can also be divided into those for the high-temperature heat medium after being heated and those for the low-temperature heat medium after being cooled. In order to ensure the required pressure, a pump can be appropriately added. As long as the underground can be used for cooling, groundwater (well water) can also be used as the heat medium. When a flow path for the heat medium is formed inside the column of the agricultural greenhouse 100, the part of the column buried underground can also constitute a cooling circuit.

[0199] The present disclosure may include the following aspects.

[0200] (Method 1)

[0201] A temperature adjustment system for plant growth is a temperature adjustment system used to assist the growth of plants planted in a culture medium; it comprises: one or more long cultivation beds for accommodating the culture medium; and a temperature adjustment panel, which is formed into a panel with a wall thickness and has a heat medium flow path formed inside it for circulating a heat medium with a higher or lower temperature than the ambient temperature; the temperature adjustment panel has a pair of main walls opposed to each other in the thickness direction of the temperature adjustment panel, the pair of main walls forming a profile longer than the wall thickness in a cross section, and the heat medium flow path is defined by the pair of main walls; the temperature adjustment panel extends along the bed length direction of the cultivation bed, and the outer surface of at least one of the pair of main walls is arranged close to the culture medium or the plant.

[0202] (Method 2)

[0203] In the temperature adjustment system for plant growth as described in Method 1, the one or more rows of cultivation beds include multiple rows of cultivation beds; the temperature adjustment panel is arranged between two rows of the multiple rows of cultivation beds that are adjacent to each other in the bed width direction, or one row of cultivation beds is arranged between two temperature adjustment panels in the bed width direction; the thickness direction of the temperature adjustment panel is oriented in the bed width direction, and the pair of main walls extend in the bed length direction and the vertical direction.

[0204] (Method 3)

[0205] In the temperature control system for plant growth according to aspect 2, the outer surface of at least one of the pair of main walls has light diffusing property or light reflecting property.

[0206] (Method 4)

[0207] In the temperature control system for plant growth according to any one of aspects 1 to 3, the temperature control panel constitutes a bottom portion of the cultivation bed.

[0208] (Method 5)

[0209] In the temperature control system for plant growth according to the fourth aspect, the temperature control panel has a storage portion for storing the liquid culture medium.

[0210] (Method 6)

[0211] In the plant growth temperature control system according to aspect 5, the temperature control panel includes a vertical wall portion extending upward from one end of the housing portion and close to the plant.

[0212] (Method 7)

[0213] In a temperature adjustment system for plant growth as described in any one of methods 1 to 6, the temperature adjustment panel has a gas flow path that is independently arranged from the heat carrier flow path and through which a gas containing carbon dioxide flows; and on the outer surface of at least one of the pair of main walls, an outlet is provided for spraying the gas in the gas flow path toward the plants.

[0214] (Method 8)

[0215] In the temperature control system for plant growth according to any one of aspects 1 to 7, the temperature control panel forms a plurality of the heating medium flow paths extending parallel to each other.

[0216] (Method 9)

[0217] In the temperature control system for plant growth according to aspect 8, the plurality of heat medium flow paths are arranged between the pair of main walls along the contour of the cross section of the main walls.

[0218] (Method 10)

[0219] In the temperature control system for plant growth described in Embodiment 8, the plurality of heat medium flow paths extend in the length direction of the bed.

[0220] (Method 11)

[0221] In the temperature control system for plant growth as described in method 10, the plurality of heat medium flow paths include one or more first heat medium flow paths for flowing the heat medium in one direction and one or more second heat medium flow paths for flowing the heat medium in a direction opposite to the one direction.

[0222] (Method 12)

[0223] In the temperature control system for plant growth according to aspect 11, the first heating medium flow path and the second heating medium flow path are alternately arranged along the cross section of the pair of main walls.

[0224] (Method 13)

[0225] In the temperature control system for plant growth according to aspect 8, the plurality of heat medium flow paths extend in a direction intersecting with the length direction of the bed.

[0226] (Method 14)

[0227] In the temperature control system for plant growth according to any one of aspects 1 to 13, the temperature control panel includes a main body having a hollow portion constituting the heat medium flow path and formed of an extruded material.

[0228] (Method 15)

[0229] In the temperature adjustment system for plant growth as described in method 14, the temperature adjustment panel also includes a pair of heads for sealing the opening of the hollow portion at both ends of the extruded material; the pair of heads are provided with an inlet for allowing the heat carrier to flow into the heat carrier flow path and an outlet for allowing the heat carrier to flow out of the heat carrier flow path.

[0230] (Method 16)

[0231] A temperature adjustment panel for plant growth is a temperature adjustment panel used to assist the growth of plants planted in a culture medium, wherein the culture medium is contained in one or more cultivation beds extending in the length direction of the bed, and the temperature adjustment panel for plant growth comprises a main body portion, wherein the main body portion is formed into a panel shape with a wall thickness, and a heat medium flow path is formed inside the main body portion for circulating a heat medium with a higher or lower temperature than the ambient temperature; the main body portion constitutes the bottom of the cultivation bed, and the outer surface of one of a pair of main walls forms the inner bottom surface of the cultivation bed.

[0232] The present application claims priority based on Japanese Patent Application No. 2022-147042, filed on September 15, 2022. Japanese Patent Application No. 2022-147042 is incorporated herein by reference.

[0233] Description of Reference Numerals

[0234] 1Temperature adjustment system

[0235] 2 Plants

[0236] 3 Culture medium

[0237] 10A, 10B, 10C cultivation beds

[0238] 20A, 20B temperature adjustment panel

[0239] 14 Containment Sector

[0240] 16 Vertical wall

[0241] 21heat carrier flow path

[0242] 25 Main body

[0243] 26, 27 Head

[0244] 31, 32 Main wall

[0245] 33, 34 end wall

[0246] 35 Next Door

[0247] 38 Spout

[0248] 51heat carrier flow path

[0249] 51a independent heat carrier flow path

[0250] 51a1 1st independent heat transfer medium flow path

[0251] 51a2 2nd independent heat transfer medium flow path

[0252] 52 Flow inlet

[0253] 53 Flow outlet

[0254] 56 Gas flow path

Claims

1. A temperature control system for plant growth, which is a temperature control system for assisting the growth of plants planted in a culture medium, characterized in that: have: One or more rows of long cultivation beds for accommodating the aforementioned culture medium; and The temperature adjustment panel is formed in a panel shape with a wall thickness, and a heat medium flow path is formed inside the panel for circulating a heat medium having a higher or lower temperature than the ambient temperature; The temperature adjustment panel has a pair of main walls facing each other in the thickness direction of the temperature adjustment panel, the pair of main walls forming a profile longer than the wall thickness in a cross section, and the heat medium flow path is defined by the pair of main walls; The temperature adjustment panel extends along the bed length direction of the cultivation bed, and the outer surface of at least one of the pair of main walls is arranged close to the culture medium or the plant.

2. The temperature control system for plant growth according to claim 1, characterized in that: The aforementioned one or more rows of cultivation beds include a plurality of rows of the aforementioned cultivation beds; The temperature adjustment panel is arranged between two rows of the cultivation beds that are adjacent to each other in the bed width direction, or one row of the cultivation beds is arranged between two temperature adjustment panels in the bed width direction. The thickness direction of the temperature adjustment panel is oriented in the bed width direction, and the pair of main walls extend in the bed length direction and in the vertical direction.

3. The temperature control system for plant growth according to claim 2, characterized in that: The outer surface of at least one of the pair of main walls has light diffusing property or light reflecting property.

4. The temperature control system for plant growth according to claim 1, wherein: The temperature adjustment panel constitutes the bottom of the cultivation bed.

5. The temperature control system for plant growth according to claim 4, characterized in that: The temperature adjustment panel has a storage portion for storing the liquid culture medium.

6. The temperature control system for plant growth according to claim 5, characterized in that: The temperature adjustment panel includes a vertical wall portion extending upward from one end of the housing portion and close to the plant.

7. The temperature control system for plant growth according to claim 1, wherein: The temperature adjustment panel has a gas flow path which is provided independently from the heat medium flow path and through which a gas containing carbon dioxide flows; A spray port for spraying the gas in the gas flow path toward the plant is provided on the outer surface of at least one of the pair of main walls.

8. The temperature control system for plant growth according to any one of claims 1 to 7, characterized in that: The temperature adjustment panel forms a plurality of the heating medium flow paths extending parallel to each other.

9. The temperature control system for plant growth according to claim 8, characterized in that: The plurality of heat medium flow paths are arranged between the pair of main walls along the contour of the cross section of the main wall.

10. The temperature control system for plant growth according to claim 8, wherein: The plurality of heating medium flow paths extend in the length direction of the bed.

11. The temperature control system for plant growth according to claim 10, wherein: The plurality of heating medium flow paths include one or more first heating medium flow paths through which the heating medium flows in one direction, and one or more second heating medium flow paths through which the heating medium flows in a direction opposite to the one direction.

12. The temperature control system for plant growth according to claim 11, wherein: The first heating medium flow path and the second heating medium flow path are alternately arranged along the cross section of the pair of main walls.

13. The temperature control system for plant growth according to claim 8, characterized in that: The plurality of heating medium flow paths extend in a direction intersecting the length direction of the bed.

14. The temperature control system for plant growth according to any one of claims 1 to 7, characterized in that: The temperature adjustment panel includes a main body having a hollow portion constituting the heat medium flow path and formed of an extruded material.

15. The temperature control system for plant growth according to claim 14, wherein: The temperature adjustment panel further includes a pair of heads at both ends of the extruded material, each of which seals the opening of the hollow portion; The pair of headers are provided with an inlet for allowing the heating medium to flow into the heating medium flow path and an outlet for allowing the heating medium to flow out of the heating medium flow path.

16. A temperature adjustment panel for plant growth, which is used to assist the growth of plants planted in a culture medium, wherein the culture medium is contained in one or more rows of cultivation beds extending in the length direction of the bed, wherein the temperature adjustment panel for plant growth is characterized in that: The main body is formed in a panel shape with a wall thickness and has a heat medium flow path formed therein through which a heat medium having a higher temperature or a lower temperature than the ambient temperature flows; The main body constitutes the bottom of the cultivation bed, and the outer surface of one of the pair of main walls forms the inner bottom surface of the cultivation bed.

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