Agricultural greenhouse

Abstract

To provide an agricultural greenhouse that can effectively control a temperature of an agricultural space.SOLUTION: An agricultural greenhouse 10 comprises: wall parts (sidewall 11, upper wall 12) for defining an agricultural space S; and a radiation panel 20 having a circuit 22 for allowing heat medium M to flow, wherein the radiation panel 20 is provided in at least a part of the sidewall 11. The agricultural greenhouse 10 has a supply source for supplying a heat medium to the circuit 22. The supply source includes a chiller 31, a well water tank 32, a waste heat tank 33, and a heat pump 34.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an agricultural greenhouse. [Background technology]

[0002] In agricultural greenhouses, the agricultural space inside can be isolated from the external environment. This makes it easy to manage and adjust the sunlight hours, temperature, humidity, water content, and other factors to suit the crops being cultivated. Patent Document 1, for example, discloses this type of technology in a plant factory equipped with a building containing plant cultivation rooms, a corridor arranged in the plant cultivation rooms, and multiple rows of plant cultivation shelves lined up along the corridor, in which radiant heating and cooling panels are arranged in the corridor along the plant cultivation shelves. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-144957 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the plant factory described in Patent Document 1, radiant heating and cooling panels are placed in the aisles along the plant cultivation shelves, allowing for appropriate temperature control. However, if the plant factory is an agricultural greenhouse with poor insulation, such as a vinyl greenhouse, it may be difficult to control the temperature inside the agricultural greenhouse due to weather conditions depending on the region and season.

[0005] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an agricultural greenhouse capable of effectively controlling the temperature in an agricultural space. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the agricultural greenhouse according to the present invention has the following features. a wall defining an agricultural space; a radiant panel having a circuit for flowing a heat medium; The radiating panel is provided on at least a part of the wall portion. Agricultural house. [Effects of the Invention]

[0007] According to the agricultural greenhouse of the present invention, the temperature in the agricultural space can be effectively controlled.

[0008] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an agricultural greenhouse according to one embodiment of the present invention. [Figure 2] FIG. 2 is a front view seen from the agricultural space side showing an example of a mounting structure for a radiation panel in an agricultural greenhouse. [Figure 3] FIG. 3 is a side view showing an example of the mounting structure of the radiation panel shown in FIG. [Figure 4] FIG. 4 is a front view seen from the agricultural space side showing another example of the mounting structure of the radiation panel in the agricultural greenhouse. [Figure 5] FIG. 5 is a side view showing an example of the mounting structure of the radiation panel shown in FIG. [Figure 6] FIG. 6 is a top view schematically showing an example of the arrangement of radiant panels in an agricultural greenhouse. DETAILED DESCRIPTION OF THE INVENTION

[0010] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0011] Fig. 1 is a schematic diagram showing the configuration of an agricultural greenhouse 10 according to one embodiment of the present invention. As shown in Fig. 1, the agricultural greenhouse 10 is placed on the ground 5. The agricultural greenhouse 10 includes a side wall 11 and an upper wall 12 that define an agricultural space S, and a radiation panel 20. The radiation panel 20 is placed within the agricultural space S along the side wall 11.

[0012] The side walls 11 and the top wall 12 are examples of wall portions that define the agricultural space S. The side walls 11 and the top wall 12 respectively define the side and top surfaces of the agricultural space S. The side walls 11 and the top wall 12 are composed of, for example, structural materials that form the framework and covering materials that cover the structural materials. Examples of structural materials that can be used include metal pipes such as iron or aluminum. Examples of covering materials that can be used include film-like plastic materials such as agricultural polyvinyl chloride film, plate-like plastic materials such as acrylic sheets, or glass sheets. The agricultural greenhouse 10 may have a floor that covers the ground 5, and the agricultural space S may be defined by the floor surface in addition to the side walls and top wall.

[0013] In the agricultural space S, one or more cultivation shelves 40 are arranged for cultivating crops 41. In the example of Fig. 1, three rows of cultivation shelves 40 are arranged. The cultivation shelves 40 may be arranged in a single tier, or in multiple tiers arranged vertically.

[0014] The radiant panel 20 has a circuit 22 for circulating a heat medium M inside a hollow panel body 21. The heat medium M is, for example, water or a refrigerant. The radiant panel 20 supplies cold or hot heat into the agricultural space S via the panel body 21 by circulating the heat medium M inside the circuit 22. In other words, the radiant panel 20 performs a heating and cooling function in the agricultural space S. The radiant panel 20 can adjust the temperature (room temperature) in the agricultural space S by adjusting the temperature of the heat medium M circulating in the circuit 22, for example, in accordance with instructions from a control unit (not shown).

[0015] The radiation panel 20 is arranged along the side wall 11, thereby suppressing the transfer of heat between the space outside the agricultural greenhouse 10 and the agricultural space S. The mounting structure of the radiation panel 20 to the side wall 11 is shown in Figs. 2 to 5. Figs. 2 and 3 show an example of embedding the radiation panel 20 into the wall surface of the agricultural greenhouse 10. In Figs. 2 to 5, the agricultural greenhouse 10 comprises a plurality of structural columns 111 erected on the ground 5 at a distance from each other, and a vinyl sheet 113 attached to the exterior of the plurality of structural columns 111. The structural columns 111 are an example of a structural material, and the vinyl sheet 113 is an example of a covering material.

[0016] 2 and 3, the radiant panel 20 is disposed between two structural columns 111 in the agricultural space S, and each of its two side edges is directly fixed to each structural column 111, so that it is embedded in a part of the side wall 11. In this way, the structural columns 111 can be used to easily attach the radiant panel 20. Furthermore, since the radiant panel 20 is installed between the two structural columns 111, the space occupied by the radiant panel 20 in the agricultural space S can be reduced. In the example of FIG. 2, the side wall 11 is arranged such that wall surfaces to which the radiant panels 20 are attached and wall surfaces to which the radiant panels 20 are not attached are alternately arranged between two adjacent structural columns 111 so as to face the vinyl sheet 113, but the arrangement of the radiant panels 20 is not limited to the example shown.

[0017] 4 and 5, the agricultural greenhouse 10 further includes a plurality of panel fixing columns 115 spaced apart from each other and erected on the ground 5. The radiant panel 20 is provided on a part of the side wall 11 of the agricultural greenhouse 10 by fixing both side edges of the radiant panel 20 to each of the two panel fixing columns 115 so as to face the vinyl sheet 113 within the agricultural space S. By using the panel fixing columns 115, the radiant panel 20 can be arranged so as to straddle the structural columns 111 as shown in FIGS. 4 and 5, and the radiant panel 20 can be arranged with a width smaller than the distance between the structural columns 111. In this way, by installing the panel fixing columns 115 at desired positions and intervals, the degree of freedom in installing the radiant panels 20 in the agricultural greenhouse 10 can be improved. In the example shown in FIGS. 4 and 5, the part of the side wall 11 where the radiant panels 20 are arranged is larger than the part where the radiant panels 20 are not arranged, but the arrangement of the radiant panels 20 is not limited to the example shown.

[0018] 2 to 5, the vinyl sheet 113 is attached to the exterior of the structural column 111, but the vinyl sheet 113 may be attached to the interior, or may be attached to both the inside and outside of the structural column 111. Furthermore, inside the vinyl sheet 113, i.e., within the agricultural space S, a wall member made of resin or the like may be placed, or the radiant panel 20 may be used as the wall surface as is.

[0019] If the radiant panels 20 were not arranged on the side walls 11 of the agricultural greenhouse, and the temperature in the external space was higher than the temperature inside the agricultural space S, the temperature inside the agricultural space S (indoor temperature) would rise due to radiant heat from the side walls 11 heated by the outside air. In contrast, in the agricultural greenhouse 10 of this embodiment, the radiant panels 20 are arranged along the side walls 11, and the radiant panels 20 block the radiant heat from the side walls 11, thereby suppressing the rise in indoor temperature. Furthermore, with the agricultural greenhouse 10 of this embodiment, radiant air conditioning makes it possible to perform air conditioning without generating wind. This prevents carbon dioxide around the crops 41 from being diffused by wind. This makes it possible to perform air conditioning while contributing to the promotion of photosynthesis.

[0020] The agricultural greenhouse 10 is equipped with a supply source (heat source) that is connected to the circuit 22 and supplies the heat medium M to the circuit 22. The supply source adjusts the temperature of the heat medium M and supplies the temperature-adjusted heat medium M to the circuit 22.

[0021] In the example of FIG. 1 , the multiple supply sources include a chiller 31, a well water tank 32, a waste heat tank 33, and a heat pump 34. The chiller 31 is connected to the circuit 22 of the radiant panel 20 via a connecting flow path 35. The chiller 31 is, for example, an absorption-type water chiller / heater that uses water as a refrigerant for heating and cooling. The well water tank 32 is connected to the circuit 22 of the radiant panel 20 via a connecting flow path 36. The well water tank 32 is, for example, a tank that stores groundwater. The waste heat tank 33 is connected to the circuit 22 of the radiant panel 20 via a connecting flow path 37. The waste heat tank 33 is, for example, a tank that accumulates waste heat hot water from a generator or the like. The heat pump 34 is connected to the circuit 22 of the radiant panel 20 via a connecting flow path 38. The heat pump 34 is, for example, a water heater that supplies heated water using a CO2 refrigerant. Note that various facilities used in factories can be used as supply sources, but dedicated facilities may also be used.

[0022] The chiller 31, well water tank 32, waste heat tank 33, and heat pump 34 each function alone, or in combination of two or more supply sources, to adjust the temperature of and circulate the heat medium M. For example, each of the connecting flow paths 35 to 38 may be provided with a valve whose opening degree can be adjusted, and the liquid temperature of the heat medium M may be adjusted by adjusting the opening degree of each valve in accordance with instructions from a control unit that controls the temperature of the agricultural greenhouse 10. The supply sources, the chiller 31, well water tank 32, waste heat tank 33, and heat pump 34, can supply the heat medium M adjusted to a desired temperature from at least one of the supply sources to the circuit 22 by opening / closing or adjusting the opening degree of each valve provided in each of the connecting flow paths 35 to 38. The valves provided in each of the connecting flow paths 35 to 38 may be selector valves that switch between opening and closing.

[0023] As described above, the radiant panel 20 supplies cold or hot heat to the agricultural space S by flowing fluid supplied from at least one of the chiller 31, well water tank 32, waste heat tank 33, and heat pump 34 through the circuit 22 as a heat medium M.

[0024] According to the agricultural greenhouse 10 of this embodiment, the radiation panel 20 is provided on a portion of the side wall 11 (wall portion), whereby the radiation panel 20 provides thermal insulation and suppresses heat transfer between the space outside the agricultural greenhouse 10 and the agricultural space S. In other words, providing the radiation panel 20 on a portion of the side wall 11 (wall portion) has the effect of maintaining a constant temperature within the agricultural space S. Therefore, according to the agricultural greenhouse 10 of this embodiment, temperature control within the agricultural space S can be easily performed. Furthermore, according to the agricultural greenhouse 10, the radiation panel 20 controls the temperature within the agricultural space S by radiation, making it possible to perform air conditioning without affecting the crops 41 with wind. Therefore, according to the agricultural greenhouse 10, air conditioning can be performed while avoiding the diffusion of carbon dioxide due to wind around the crops 41 and contributing to the promotion of photosynthesis. Furthermore, if a heat pump type air conditioner is provided in the agricultural greenhouse 10, the radiant heating and cooling effect of the radiation panel 20 can reduce the load on the air conditioner.

[0025] The agricultural greenhouse 10 of this embodiment is connected to the circuit 22 and includes supply sources (chiller 31, well water tank 32, waste heat tank 33, heat pump 34) that supply the heat medium M to the circuit 22. Therefore, by flowing the heat medium M supplied from the supply sources through the circuit, the heat insulating effect of the radiant panel 20 can be obtained.

[0026] In the agricultural greenhouse 10 of this embodiment, the supply source adjusts the temperature of the heat medium M and supplies the temperature-adjusted heat medium M to the circuit 22. Therefore, by flowing the temperature-adjusted heat medium M through the circuit 22 of the radiant panel 20, temperature control by the radiant heating and cooling of the radiant panel 20 becomes possible.

[0027] According to the agricultural greenhouse 10 of this embodiment, the walls (side walls 11, top wall 12) are composed of structural materials that form the framework and covering materials that cover the structural materials, and the covering materials are at least one of film-like plastic materials, plate-like plastic materials, and glass plates. In this way, in agricultural greenhouses with low thermal insulation, such as vinyl greenhouses, the radiant panels 20 can improve thermal insulation, making it easy to control the temperature within the agricultural space S.

[0028] The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. In addition, the material, shape, dimensions, numerical values, form, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention.

[0029] For example, in the example of FIG. 1, the radiant panel 20 is provided along one of the side walls 11, but the installation position of the radiant panel 20 is not limited to the example of FIG. 1. For example, as shown in FIG. 6, a plurality of radiant panels 20 may be provided along each of two opposing side walls 11. By increasing the number of radiant panels 20 installed, the heat insulation effect and the air conditioning effect by radiant heating and cooling can be improved. Furthermore, the radiant panel 20 may be provided on part of the upper wall 12 (ceiling surface). By providing the radiant panel 20 on the upper wall 12, sunlight can be blocked, thereby improving the heat insulation effect.

[0030] Here, the features of the above-described embodiments of the agricultural greenhouse according to the present invention will be briefly summarized and listed below in [1] to [6].

[0031] [1] Walls (side walls 11, upper walls 12) that define an agricultural space (S), a radiation panel (20) having a circuit (22) through which a heat medium (M) flows; The radiant panel (20) is provided on at least a part of the wall portion. Agricultural house (10).

[0032] According to the agricultural greenhouse having the configuration [1] above, by providing the radiant panel on at least a part of the wall, the radiant panel acts as an insulator and can suppress the transfer of heat between the agricultural space and the external space of the agricultural greenhouse. In other words, by providing the radiant panel on at least a part of the wall, the temperature in the agricultural space can be kept constant. Therefore, according to this agricultural greenhouse, it is easy to control the temperature in the agricultural space.

[0033] [2] A supply source (chiller 31, well water tank 32, waste heat tank 33, heat pump 34) connected to the circuit and supplying the heat medium to the circuit is provided. The agricultural house described in [1] above.

[0034] According to the agricultural greenhouse having the configuration [2] above, the heat transfer medium supplied from the supply source is caused to flow through the circuit, thereby obtaining the heat insulating effect of the radiant panel.

[0035] [3] The supply source adjusts the temperature of the heat medium and supplies the temperature-adjusted heat medium to the circuit. The agricultural house described in [2] above.

[0036] According to the agricultural greenhouse having the configuration [3] above, a temperature-adjusted heat medium flows through the circuit of the radiant panel, making it possible to control the temperature by radiant heating and cooling of the radiant panel.

[0037] [4] The wall portion is composed of a structural material that constitutes a framework and a covering material that covers the structural material, The covering material is at least one of a film-shaped plastic material, a plate-shaped plastic material, and a glass plate; An agricultural house according to any one of [1] to [3] above.

[0038] According to the agricultural house having the configuration [4] above, the thermal insulation of agricultural houses with low thermal insulation, such as vinyl greenhouses, can be improved by the radiant panels, making it easy to control the temperature within the agricultural space.

[0039] [5] The structural member includes two body columns (111) spaced apart from each other, The radiating panel is provided on at least a part of the wall by fixing both side edges of the radiating panel to each of the two body columns, The agricultural house described in [4] above.

[0040] According to the agricultural greenhouse with the configuration [5] above, the radiant panel can be easily attached using the frame columns of the greenhouse. In addition, since the radiant panel is installed between two frame columns, the space occupied by the radiant panel in the agricultural space can be reduced.

[0041] [6] Two panel fixing columns (115) are provided in the agricultural space and spaced apart from each other, The radiating panel is provided on at least a part of the wall by fixing both side edges of the radiating panel to the two panel fixing columns respectively so as to face the covering material. The agricultural house described in [4] above.

[0042] According to the agricultural greenhouse having the configuration [6] above, by installing the radiation panel using the panel fixing pillar, the radiation panel can be installed at any position in the agricultural space by installing the panel fixing pillar, thereby improving the freedom of installing the radiation panel. [Explanation of symbols]

[0043] 10 Agricultural House 11 Side wall (wall) 12 Upper wall (wall section) 20 Radiant Panel 21 Panel body 22 circuits 31 Chiller (supply source) 32 Well water tank (supply source) 33 Waste heat tank (supply source) 34 Heat pump (source) 35, 36, 37, 38 Connecting channels 40 Cultivation shelf 41 Crops 111 Core pillar 113 Vinyl Sheet 115 Panel fixing column M Heat medium S Agricultural space

Claims

1. a wall defining an agricultural space; a radiant panel having a circuit for flowing a heat medium; The radiating panel is provided on at least a part of the wall portion. Agricultural house.

2. a supply source connected to the circuit and supplying the heat medium to the circuit; The agricultural house according to claim 1.

3. The supply source adjusts the temperature of the heat medium and supplies the temperature-adjusted heat medium to the circuit. The agricultural house according to claim 2.

4. The wall portion is composed of a structural material that forms a framework and a covering material that covers the structural material, The covering material is at least one of a film-like plastic material, a plate-like plastic material, and a glass plate; The agricultural greenhouse according to any one of claims 1 to 3.

5. The structural member includes two body columns spaced apart from each other, The radiating panel is provided on at least a part of the wall by fixing both side edge portions of the radiating panel to each of the two body columns, The agricultural house according to claim 4.

6. Two panel fixing posts are provided in the agricultural space and spaced apart from each other, The radiating panel is provided on at least a part of the wall by fixing both side edges of the radiating panel to the two panel fixing columns respectively so as to face the covering material. The agricultural house according to claim 4.

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