JP4818222B2 - Plant growth equipment - Google Patents

Description

  The present invention relates to a plant growth facility for growing a plant with improved air conditioning efficiency.

  2. Description of the Related Art Conventionally, plant cultivation facilities that facilitate the growth and harvest of plants and improve the efficiency of air conditioning are known.

  Specifically, this kind of plant cultivation facility has a pair of wall materials with a gap in the room installed in a horizontal direction, and a plurality of pillars provided in the vertical direction along the wall material in a horizontal direction. The protruding brackets are mounted in multiple steps in the vertical direction, and a plurality of groove-shaped beds are mounted horizontally on the brackets. A planting panel is arranged on the bed, and plants are grown on the planting panel. Yes.

  The air conditioning passage is used as an air conditioning passage through which the conditioned air flows between the pair of wall materials, and a plurality of air conditioning air blowing holes are formed in the wall material, so that a gap between the wall materials is used as an air conditioning passage. The conditioned air that has passed through can be spot-blasted to each plant from the conditioned air blowing hole provided in the wall material.

As a result, each plant can be blown at an optimum wind speed for growth, and only the temperature of the space around the plant is controlled while eliminating the temperature unevenness, and the air conditioning efficiency is improved as compared with adjusting the temperature of the entire room ( For example, see Patent Document 1).
JP2005-021064

  However, in such a conventional configuration, although the air conditioning efficiency is improved, the air conditioning efficiency is not substantially improved. Specifically, when illumination is performed in the vicinity of a plant, the surrounding air is warmed. And since the warmed air is diffused into the room together with the air blown out from the air-conditioned air blowing hole, there is a problem that the cooling operation of the air-conditioning apparatus is always required.

  The present invention has been made paying attention to such problems, and the main purpose is to utilize natural cooling as much as possible while ensuring a suitable growth environment (particularly a light environment) for plants. An object of the present invention is to provide a plant growing facility that contributes to the realization of effective energy saving by minimizing the cooling operation by the air conditioner.

  That is, the plant growth facility according to the present invention includes a warm air suction port for sucking warm air heated by the plant growth lighting provided in the plant growth room to the outside, and the warm air sucked by the warm air suction port. Based on a natural cooling unit that naturally cools, a blowout port that blows air naturally cooled in the natural cooling unit into the room, a temperature sensor provided in the vicinity of the blowout port, and an output value of the temperature sensor, And an indoor cooling unit that operates to further reduce the temperature of the naturally cooled air.

  Here, the “plant” is not limited to those that can be used as food, such as vegetables and fruits, but is a broad concept that includes ornamental plants. The growing method is preferably hydroponics, but is not limited to this and may be soil cultivation. In addition, the “indoor side cooling section” means that the air is cooled and then blown out as cold air (for example, an air conditioner), the one that simply generates wind (for example, a fan), the one that uses radiative cooling without causing wind, etc. Any room that can forcibly cool the room using electric energy or the like may be used. Further, the temperature sensor and the indoor side cooling unit may be integrally incorporated, or may be separate.

  If it is such, the warm air warmed by the plant growth lighting is sucked out of the room through the warm air inlet, cooled by the natural cooling section, and then blown out into the room through the outlet. . The temperature of the naturally cooled air is detected by a temperature sensor. If the air is not cooled to the set temperature, the indoor cooling is performed so that only the temperature that cannot be naturally cooled decreases. The part operates to further cool the naturally cooled air. Therefore, the cooling capacity of the natural cooling unit can be maximized, while the cooling operation of the indoor cooling unit is minimized to contribute to the realization of effective energy saving. In addition, since the plant growth chamber can be a closed system that does not use external air, for example, to prevent the entry of bacteria from the outside into the chamber, for example, to prevent plant growth in terms of hygiene. This is effective for realizing a suitable environment.

  That is, while ensuring a suitable plant growth environment (especially light environment), by using natural cooling as much as possible, the cooling operation by the air conditioner is minimized, contributing to the realization of effective energy saving, An excellent plant growth facility can be provided.

  As a desirable mode of the natural cooling unit of the present invention, a water-cooled type in which the natural cooling unit uses a cooling action by natural water such as spring water can be cited.

  If the natural cooling section is configured using an underground spring tank of a building, it is not necessary to incur a special cost for providing the natural cooling section, and the cost of equipment investment can be reduced. In addition, since the spring water can be used as the cooling water without using the tap water, the operation cost can be reduced.

  In order to reduce the operation cost while obtaining an effective cooling effect, the natural cooling section has a ventilation path for guiding the warm air along the water surface of the underground spring tank. Is desirable.

  If the ventilation path is bent at least at a part between the inlet and the outlet of the ventilation path, the contact time between warm air and water can be increased to effectively cool the warm air. it can.

  If the hot air suction port and the temperature sensor are respectively arranged in separate spaces that are partitioned so as not to completely block the entry and exit of air, the hot air suction is placed in the separate spaces. By arranging each of the mouth and the temperature sensor, the temperature sensor can accurately detect the temperature of naturally cooled air while preventing the detection of hot air. Therefore, the indoor cooling unit operates to lower the temperature only for naturally cooled air without being affected by the temperature of the warm air, so that the cooling operation of the indoor cooling unit is minimized. In particular, it contributes to the realization of effective energy saving.

  A shelf unit including one or more support columns and one or more plant growth shelves supported by the support columns, and each of the shelf units is provided with the illumination and the hot air inlet. Thus, warm air warmed by such illumination can be efficiently sucked in by the warm air suction port.

  The illumination is provided in the internal space without blocking the light that the illumination irradiates the plant, and is provided between the illumination accommodation and the hot air inlet and warmed by the illumination. If it has a warm air derivation unit that guides the air in the internal space to the warm air intake port, the warm air derivation unit causes the air heated by the illumination to go indoors Therefore, it is possible to effectively lead to the outdoor natural cooling section, which contributes to effective energy saving, such as preventing the indoor cooling section from operating unnecessarily by the warmed air.

  Thus, in the plant growth facility according to the present invention, the warm air heated by the plant growth lighting is sucked out of the room through the warm air suction port, cooled by the natural cooling unit, and then indoors through the blowout port. Blown out. The temperature of the naturally cooled air is detected by a temperature sensor. If the air is not cooled to the set temperature, the indoor cooling is performed so that only the temperature that cannot be naturally cooled decreases. The part operates to further cool the naturally cooled air. Therefore, the cooling capacity of the natural cooling unit can be maximized, while the cooling operation of the indoor cooling unit is minimized to contribute to the realization of effective energy saving. In addition, since the plant growth chamber can be a closed system that does not use external air, for example, to prevent the entry of bacteria from the outside into the chamber, for example, to prevent plant growth in terms of hygiene. This is effective for realizing a suitable environment.

  That is, while ensuring a suitable plant growth environment (especially light environment), by using natural cooling as much as possible, the cooling operation by the air conditioner is minimized, contributing to the realization of effective energy saving, An excellent plant growth facility can be provided.

  An embodiment of the present invention will be described below with reference to the drawings.

  The plant growth facility Z according to the present embodiment is configured using, for example, an underground portion of a reinforced concrete building (the ground portion is not shown).

  Before concrete description of the plant growth facility Z, first, the underground part will be described.

  As shown in FIGS. 1 and 2, the basement section includes a plant growth room 1 for plant growth provided in the first basement part of the building, and an underground spring tank 2 provided under the floor of the plant growth room 1. It is provided.

  The plant growth room 1 is of a substantially rectangular box shape having a floor surface of about 10 m × 10 m and a ceiling height of about 3 m. In addition, the shape, size, etc. of this plant growth chamber 1 are not restricted to the thing of this embodiment, It can change suitably according to the embodiment.

  The underground spring tank 2 is composed of a plurality of spring bits separated by a plurality of standing walls 21. In the present embodiment, as shown in FIG. 3 and the like, nine spring bits 21Ba to 21Bi (hereinafter, collectively referred to as “spring bits 21B”) are provided.

  Each spring bit 21B has a substantially rectangular box-shaped internal space having an internal height of about 1.5 m. And the spring water M which seeps into this underground spring tank 2 from the surrounding wall 22 of the underground spring tank 2, etc. is made to accumulate in the spring bit 21B (refer FIG. 4, it abbreviate | omits in another figure). Here, “spring water” is a broad concept including not only water (groundwater) that oozes from the peripheral wall 22 and the like but also rainwater. Further, the water accumulated in the spring water bit 21 is not limited to the spring water, and for example, it does not prevent the tap water from being actively accumulated. Further, the bottom surface of the spring water bit 21B is inclined so that water flows in a predetermined direction. Thus, the water of each spring bit 21 flows into one spring bit 21 and is collected using this inclination and a water passage hole X described later. In addition, water can be appropriately discharged from the one spring bit 21 to the outside. More specifically, in the present embodiment, as shown in FIG. 4, among the nine spring bits 21B, the height of the bottom face of the spring bit 21Be is lower than the height of the bottom face of the other spring bits 21. Thus, the water can be appropriately discharged from the drain 21Be1 provided in the spring bit 21Be.

  As shown in FIGS. 6 and 7, the standing wall 21 has ventilation holes W1 to W8 (hereinafter collectively referred to as ventilation holes W) and ventilation holes X1 to X8 (hereinafter referred to as ventilation holes). Water hole X). Specifically, as shown in FIG. 3, the vent hole W1 is provided between the spring bit 21Ba and the spring bit 21Bb. A ventilation hole W2 is provided between the spring bit 21Bb and the spring bit 21Be. A ventilation hole W3 is provided between the spring water bit 21Be and the spring water bit 21Bd. A ventilation hole W4 is provided between the spring bit 21Bd and the spring bit 21Bg. A ventilation hole W5 is provided between the spring bit 21Bg and the spring bit 21Bh. A ventilation hole W6 is provided between the spring bit 21Bh and the spring bit 21Bi. A ventilation hole W7 is provided between the spring water bit 21Bi and the spring water bit 21Bf. A ventilation hole W8 is provided between the spring bit 21Bf and the spring bit 21Bc. And in this embodiment, it is set as the magnitude | size which can pass a person through this ventilation hole. Specifically, it is a square hole with an inner method of 55 cm.

  On the other hand, as shown in FIG. 6 and the like, the water hole X1 is provided between the spring bit 21Ba and the spring bit 21Bb. Further, a water passage hole X2 is provided between the spring water bit 21Bb and the spring water bit 21Be. Further, a water passage hole X3 is provided between the spring water bit 21Be and the spring water bit 21Bd. Moreover, the water flow hole X4 is provided between the spring bit 21Bd and the spring bit 21Bg. Further, a water passage hole X5 is provided between the spring water bit 21Bh and the spring water bit 21Be. Further, a water passage hole X6 is provided between the spring bit 21Bf and the spring bit 21Bi. Further, a water passage hole X7 is provided between the spring water bit 21Be and the spring water bit 21Bf. Moreover, the water flow hole X8 is provided between the spring bit 21Bb and the spring bit 21Bc. In this embodiment, the water passage hole X has a size that allows water to flow. Specifically, it is a round hole of about several centimeters. Further, the water hole X is disposed at a position lower than the air hole W.

  Next, the plant growth equipment Z will be specifically described.

As shown in FIGS. 1, 2, and 5, the plant growth facility Z includes a plurality of shelf units 3 including plant growth shelves 32 and the like, and plant growth lighting provided in the plant growth chamber 1. The warm air suction port 4a that sucks warmed warm air A1 out of the room, the natural cooling unit 5 that naturally cools the warm air sucked in the warm air suction port 4a, and the natural cooling unit 5 are naturally cooled. Based on the air outlet 6a for blowing air A2 into the plant growth chamber 1, the temperature sensor 7a provided in the vicinity of the air outlet 6a, and the output value of the temperature sensor 7a, the temperature of the naturally cooled air A2 is determined. in addition to comprising; and a indoor cooling unit 7b which operates to further reduce the temperature control device for the temperature control, not shown, mist spraying device for humidity control, CO for CO ₂ concentration control ₂ Supply device Beauty, and fertilizer supply device for supplying fertilizers are those formed by and a growth control main unit for controlling these devices. Hereinafter, each part is demonstrated concretely.

  As shown in FIG. 5 and the like, the shelf unit 3 includes a plurality of support columns 31 erected between the floor surface 11 and the ceiling surface 12 of the plant growth chamber 1, and a plant growth shelf supported by the support columns 31. 32 and a light irradiation device 33 for illuminating a plant growing on the shelf 32 (corresponding to “illumination for plant growth” of the present invention).

  The shelf 32 has a substantially box-like shape with an upper surface opened so that a plurality of cultivation pallets 3P can be placed in a line. And the liquid manure intake (not shown) for taking in liquid fertilizer is provided in one end part, and the liquid manure discharge port (not shown) for discharging | emitting the liquid fertilizer which circulated the inside is provided in the other end part. Moreover, in this embodiment, the shelf 32 is mounted in a state in which, for example, twelve cultivation pallets 3P are arranged in a line in correspondence with the number of days required for harvesting lettuce V in the plant growing room 1. It is configured to be able to. The number of cultivation pallets 3P arranged on the shelf 32 can be changed as appropriate according to the vegetables to be cultivated. In addition, the number of plants to be cultivated is 6 in each cultivation pallet 3P, but this number may be arbitrary.

  The light irradiation device 33 is provided on the lower surface of each shelf 32, and uses a light emitting diode that emits white light as a light source, and an irradiation cycle of 2 μsec to 1 msec and a duty ratio of 20 to 70% (DT ratio). The pulse light is configured to be able to irradiate the plant. In this embodiment, the irradiation cycle and the duty ratio are configured to be controlled by a growth control main device (not shown). Thereby, the plant currently growing on the shelf 32 one step below can be suitably illuminated by each light irradiation device 33.

  The warm air suction port 4a is for sucking warm air A1 warmed by the light irradiation device 33 into the warm air suction duct 4 disposed outside the plant growth room 1 (for example, behind the ceiling). The warm air suction duct 4 is provided with a fan (not shown) for sucking warm air A1. The warm air A1 guided from the warm air suction port 4a is guided to the underground spring tank 2 through the warm air suction duct 4. In the present embodiment, the warm air suction duct 4 is provided with a substantially equal sectional shape (for example, a rectangular shape or a circular shape) in the longitudinal direction so that a predetermined air volume can be secured over the entire area of the warm air suction duct 4. Etc.).

  The natural cooling unit 5 is configured using the underground spring tank 2. In the present embodiment, the natural cooling unit 5 is of a water-cooling type using a cooling action by natural water such as spring water. Specifically, as shown in FIG. 7, the natural cooling unit 5 has taken into the introduction port 2x of the underground spring tank 2 (corresponding to “the inlet of the ventilation path” of the present invention) from the hot air suction duct 4. The hot air A1 is guided along the surface of the water accumulated in the spring bit 21, and from the outlet 2y of the underground spring tank 2 (corresponding to the “exit of the ventilation path” of the present invention) to the blowout duct 6 A ventilating path P to be derived is provided. The introduction port 2x of the underground spring tank 2 is formed in the peripheral wall of the spring bit 21Ba. Moreover, the outlet 2y of the underground spring tank 2 is formed in the peripheral wall of the spring bit 21Bc.

  In addition, in this embodiment, this ventilation path P is made of the spring water bit 21Ba → (ventilation hole W1) → spring water bit 21Bb → (ventilation hole W2) → spring water bit 21Be → (ventilation hole W3) → spring water bit 21Bd. → (ventilation hole W4) → spring water bit 21Bg → (ventilation hole W5) → spring water bit 21Bh → (ventilation hole W6) → spring water bit 21Bi → (ventilation hole W7) → spring water bit 21Bf → (ventilation hole W8) → A path of spring bit 21Bc is provided. Therefore, the warm air A1 passing through the ventilation path P passes through each spring bit 21 while being bent at substantially right angles in the five spring bits (21Bb, 21Be, 21Bd, 21Bg, 21Bi). It will be.

  The outlet 6 a is provided in the outlet duct 6 arranged outside the plant growth room 1 (for example, behind the wall) and is cooled in the underground spring tank 2 that is sent through the outlet duct 6. The air is blown out from the outlet 6a into the plant growth chamber 1. In the present embodiment, the blowing duct 6 is provided with a fan (not shown) for blowing out the air cooled in the underground spring tank 2. Further, in the same manner as the warm air suction duct 4, the blowout duct 6 has substantially the same cross-sectional shape in the longitudinal direction (for example, a rectangular shape or a circular shape) so that a predetermined air volume can be secured over the entire area. It is said.

  The temperature sensor 7a and the indoor side cooling unit 7b are incorporated in a general commercial air conditioner 7. If the output value of the temperature sensor 7a is equal to or higher than a set value, the indoor side cooling unit 7b In order to further reduce the temperature of the naturally cooled air A2, cold air is blown out from the louver-like cold air blowing port 7b1, while if it is less than the set value, the blowing of the cold air is stopped or the natural cooling is performed. It operates to blow out cool air to such an extent that the temperature of the air A2 does not rise.

  Although not shown in detail, the temperature control device uses a Peltier element so that heating or cooling can be performed by one device, and the temperature control device is attached to the lower surface of the shelf 32. That is, a Peltier element provided on the upper shelf 32 is used. In addition, it does not prevent that it comprises so that only one of heating or cooling can be performed. In the present embodiment, the operation time of the Peltier element is controlled by the main device for growth control.

  Although the details are not shown in the mist injection device, the water taken from the water pipe is made into a water vapor mist and injected from the mist injection port, so that the humidity in the vicinity of the plant can be maintained and auxiliary hydration to the plant can be performed. The mist injection port is provided on the lower surface of the shelf 32. That is, the mist injection port provided in the upper shelf 32 is used. And in this embodiment, it has comprised so that the injection time of water vapor | mist mist may be controlled by the main apparatus for growth control.

Although not shown in detail in the CO ₂ supply device, carbon dioxide is injected from a carbon dioxide supply port connected to a carbon dioxide gas cylinder to promote photosynthesis of the plant. Are provided on the lower surface of the shelf 32. That is, the carbon dioxide supply port provided in the upper shelf 32 is used. And in this embodiment, it is comprised so that the supply time of a carbon dioxide may be controlled with the main apparatus for growth control.

  The fertilizer supply device is not shown in detail, but for example, nitrogen, phosphoric acid, potassium, lime, sulfur, iron, boron, manganese, zinc, molybdenum, copper, chlorine, silicon, cobalt, vanadium, aluminum, selenium, etc. The liquid fertilizer obtained by appropriately mixing each of the above nutrients with water is supplied into the shelf 32 from the fertilizer supply port. And in this embodiment, it is comprised so that the supply amount of liquid fertilizer and the component ratio of each nutrient may be controlled by the main apparatus for growth control.

  About the plant growth installation Z comprised as mentioned above, the usage method is described below.

  When light is irradiated on the plants on the shelf 32 from the light irradiation device 33, the surrounding air is warmed. The warmed air A1 is sucked into the warm air suction duct 4 from the warm air suction port 4a. The warm air A1 guided from the warm air suction port 4a is guided to the underground spring tank 2 through the warm air suction duct 4.

  The hot air A1 guided to the underground spring tank 2 passes through the ventilation path P, that is, the spring bit 21Ba → (ventilation hole W1) → the spring bit 21Bb → (ventilation hole W2) → the spring bit 21Be → ( Ventilation hole W3) → Spring bit 21Bd → (Ventilation hole W4) → Spring bit 21Bg → (Ventilation hole W5) → Spring bit 21Bh → (Ventilation hole W6) → Spring bit 21Bi → (ventilation hole W7) → Spring The water bit 21 </ b> Bf → (ventilation hole W <b> 8) → the spring water bit 21 </ b> Bc is introduced into the blowout duct 6 and then blown into the plant growth chamber 1 from the blowout port 6 a.

  At this time, since the ventilation path P is formed along the surface of the water M in the spring bit 21B or the like, the hot air A1 passing through the ventilation path P is cooled by the water M.

  Thus, the warm air A1 heated by the plant growth lighting is sucked out of the room through the warm air inlet 4a, cooled by the natural cooling section 5, and then blown out into the room through the outlet 6a. It becomes.

  In the present embodiment, as shown in FIG. 8, the natural cooling unit 5 can obtain a cooling effect of about 5 ° C. at maximum.

  The temperature of the naturally cooled air A2 is detected by the temperature sensor 7a.

  Here, if the output value of the temperature sensor 7a is equal to or higher than the set value, the indoor side cooling unit 7b operates to blow cold air so as to further reduce the temperature of the naturally cooled air A2, while less than the set value. If so, the operation is performed to stop blowing the cool air or to blow the cool air to such an extent that the temperature of the naturally cooled air A2 does not rise.

  In the present embodiment, although not shown, by using the natural cooling unit 5, the power of the air conditioner 7 can be reduced by about 8 kWh compared to the case where the natural cooling unit 5 is not used.

  As described above, according to the plant growth facility Z according to the present embodiment, the warm air A1 warmed by the light irradiated by the light irradiation device 33 is sucked into the warm air suction duct 4 from the warm air suction port 4a and is naturally cooled. After being cooled in the underground spring tank 2, which is part 5, it is blown out into the plant growth chamber 1 through the blowout port 6 a of the blowout duct 6.

  Then, the temperature of the naturally cooled air A2 is detected by the temperature sensor 7a of the air conditioner 7. When the air is not cooled to the set temperature, only the temperature that cannot be naturally cooled is lowered. In addition, the indoor cooling unit 7b of the air conditioner 7 operates to further cool the naturally cooled air A2. Accordingly, the cooling capacity of the natural cooling unit 5 can be maximized, while the cooling operation of the indoor side cooling unit 7b is minimized to contribute to the realization of effective energy saving.

  Moreover, the plant growth chamber 1 is only connected to the underground spring tank 2 via a duct, and is a closed system that does not use external air for cooling the hot air A1. Therefore, it is effective for preventing the entry of bacteria from the outside into the room and realizing an environment suitable for plant growth in terms of hygiene.

  Moreover, since natural cooling is performed using the water in the spring bit 21B when the hot air A1 is cooled, the naturally cooled air A2 blown out from the outlet 6a contains moderate moisture. It is suitable for the plants that grow in the plant growth chamber 1 and are given appropriate moisture.

  In other words, excellent plant growth that contributes to the realization of effective energy saving by minimizing the cooling operation by the air conditioner by using natural cooling as much as possible while realizing a suitable light environment of the plant Equipment Z can be provided.

  Moreover, in this embodiment, since the natural cooling part 5 is comprised using the underground spring water tank 2 of a building, it is not necessary to spend special expense in order to provide the natural cooling part 5, and capital investment Cost can be reduced. In addition, since the spring water can be used as the cooling water without using the tap water, the operation cost can be reduced.

  Moreover, since the natural cooling part 5 has the ventilation path P which guides the said warm air A1 along the water surface in the said underground spring tank 2, operating cost is obtained, obtaining an effective cooling effect. Can be reduced.

  Moreover, since the ventilation path P is bent by five spring bits (21Bb, 21Be, 21Bd, 21Bg, 21Bi) between the inlet 2x and the outlet 2y of the ventilation path P, warm air Compared with the case where A1 is guided linearly from the inlet to the outlet of the ventilation path P, the contact time between the warm air A1 and water can be increased, and the warm air A1 can be effectively cooled.

  The present invention is not limited to the above embodiment.

  For example, in the present embodiment, the plant growth facility Z is configured using the underground portion, but does not prevent the configuration using the above-ground portion. An embodiment in which both the underground part and the ground part are used is also conceivable.

  Moreover, the structure of the shelf 32 and the support | pillar 31 provided in the plant growth chamber 1 is not restricted to this embodiment.

  In addition, as shown in FIG. 9, an embodiment in which the warm air inlet 4a and the temperature sensor 7a are arranged in separate spaces partitioned so as not to completely block the entry and exit of air is also conceivable. It is done.

  Here, in order to realize such partitioning, as shown in FIG. 9, for example, between the adjacent shelf units 3, a synthetic resin partition curtain C is provided from the ceiling of the plant growth chamber 1 to the vicinity of the floor. What is necessary is just to make it the aspect of hanging down.

  With such a configuration, by arranging the warm air inlet 4a and the temperature sensor 7a in separate spaces partitioned by the partition curtain C, the temperature sensor 7a allows the warm air A1 to be generated by the curtain. The temperature of the naturally cooled air A2 can be detected with high accuracy while preventing direct detection. Accordingly, the indoor side cooling unit 7b operates so as to decrease the temperature of only the naturally cooled air A2 without being affected by the temperature of the hot air A1, and thus the cooling operation of the indoor side cooling unit 7b. This contributes to the realization of effective energy saving.

  A specific energy saving effect by the partition curtain C will be described with reference to FIGS.

  FIG. 10 shows the measurement results of the temperature at three locations of the upper, middle, and lower stages of the shelf unit 3 when there is no partition curtain C, and FIG. The axis is temperature and the horizontal axis is time. Here, in each figure, the temperature of the upper stage, the middle stage, and the lower stage is uniformly increased or decreased depending on the operation of the light irradiation device 33 or the like.

  10 and 11, it can be seen that there is almost no difference in temperature depending on the presence or absence of the partition curtain C in the lower stage. In the middle stage, by using the partition curtain C, a temperature drop of about 5 ° C. (near time 21: 00′01) can be seen. In the upper stage, by using the partition curtain C, a temperature drop of about 4 ° C. (near time 21: 00′01) can be seen.

  That is, by using the partition curtain C, the temperature in the space partitioned by the partition curtain C can be lowered, and the cooling operation of the indoor side cooling unit 7b can be minimized to realize energy saving.

  In addition, as shown in FIG. 12, the light irradiation device 33 is disposed in, for example, a transparent and cylindrical illumination housing portion 3X, and the warm air A1 in the illumination housing portion 3X heated by the light irradiation device 33 is An embodiment is also conceivable in which the tubular warm air outlet 3Y is configured to guide the warm air to the warm air inlet 4a.

  With such a configuration, the hot air deriving unit 3Y can effectively guide the warm air A1 heated by the light irradiation device 33 to the outdoor natural cooling unit 5 without allowing it to go indoors. Therefore, it contributes to effective energy saving such as preventing the air conditioner 7 from operating unnecessarily by the hot air A1.

Moreover, the light irradiation device 33, the temperature control device, a mist injector, CO ₂ supply device, and is configured to include all the fertilizer supply device, at least, it is sufficient that includes a light irradiation device 33.

  Moreover, the apparatus which a growth environment control part controls is not restricted to each apparatus mentioned above. For example, any device that causes a phenomenon that appears as a natural phenomenon, such as a fog generation device that generates fog, a wind generation device that generates wind, or an illumination control device that realizes a sunshine state by blinking of illumination may be used. However, it does not matter whether the control is to realize the natural environment.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The front view which shows typically the structure of the underground part of the building to which the plant growth installation in one Embodiment of this invention is applied. The same side view. FIG. Sectional drawing of the structure of an underground spring tank in D1-D2 of FIG. The figure which expands and shows the shelf part in the embodiment. The figure which shows the flow of the water in the same embodiment. The figure which shows the flow of the warm air in the same embodiment. The figure which shows the cooling effect by the natural cooling part in the embodiment. The figure which shows typically the structure of the underground part of the building to which the plant growth installation in other embodiment of this invention is applied. The figure for demonstrating the effect of the partition curtain in the embodiment (no curtain). The figure for demonstrating the effect of the partition curtain in the same embodiment (with a curtain). The principal part enlarged view of the plant growth installation in other embodiment of this invention.

Explanation of symbols

1 .... Plant growth room 2 .... Underground spring tank 2x ... Inlet (airway entrance)
2y ... outlet (exit of ventilation path)
4a ... Warm air inlet 5 ... Natural cooling unit 6a ... Outlet 7a ... Temperature sensor 7b ... Indoor cooling unit 31 ... Column 32 ... Shelf 33 ... Lighting for plant growth (light irradiation device)
3X: Illumination housing 3Y: Warm air outlet A1: Warm air A2 ... Naturally cooled air P ...... Ventilation path Z ... Plant growth equipment

Claims (8)

A warm air inlet for sucking warm air heated by the plant growth lighting provided in the plant growth room to the outside;
A natural cooling part for naturally cooling the warm air sucked in the warm air suction port;
A blowout port for blowing out the air naturally cooled in the natural cooling unit into the room;
A temperature sensor provided in the vicinity of the outlet;
A plant growth facility comprising: an indoor cooling unit that operates to further reduce the temperature of the naturally cooled air based on an output value of the temperature sensor.   The plant growth facility according to claim 1, wherein the natural cooling section is of a water cooling type utilizing a cooling action by natural water such as spring water.   The plant growth facility according to claim 2, wherein the natural cooling section is configured using an underground spring tank of a building.   The plant growth facility according to claim 2 or 3, wherein the natural cooling section has a ventilation path that guides the warm air along a water surface of the water in the underground spring.   The plant growth facility according to claim 4, wherein the ventilation path is bent at least at a part between an inlet and an outlet of the ventilation path.   The said warm air inlet and the said temperature sensor are each distribute | arranged to the separate space partitioned so that the entrance / exit of air might not be prevented completely, The each of Claim 1 thru | or 5 characterized by the above-mentioned. Plant growth equipment.   A shelf unit including one or a plurality of support columns and one or a plurality of plant growth shelves supported by the support columns, and the lighting unit and the warm air inlet are provided for each shelf unit. The plant growth facility according to any one of claims 1 to 6, characterized in that   The illumination is provided in the internal space without blocking the light that the illumination irradiates the plant, and is provided between the illumination accommodation and the hot air inlet and warmed by the illumination. The plant growth facility according to any one of claims 1 to 7, further comprising: a warm air derivation unit that guides the air in the internal space to the warm air suction port.