JP2011217729A - Hydroponic apparatus and hydroponic facility equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive apparatus with a simple structure which allows for temperature control in a greenhouse.SOLUTION: A nutrient solution tank 2 is provided blow a cultivation shelf 3 so that a gap 8 is formed between the cultivation shelf 3 and nutrient solution 20. A blower 90 or the like is also provided so that air having flown through the gap 8 along a liquid surface of the nutrient solution 20 circulates through a communication passage 10. Furthermore, the temperature of the nutrient solution 20 is controlled by a nutrient solution temperature control means 6 to an appropriate temperature (for example, around 10°C). Thus, the temperature of the air in the greenhouse 7 can be controlled to the appropriate temperature. The invention can achieve an inexpensive and suitable temperature control without requiring a large-scale equipment such as a commercially available air conditioner or the like.

Description

  The present invention relates to a hydroponic cultivation apparatus that performs hydroponic cultivation of plants, and a hydroponic cultivation facility that includes the hydroponic cultivation apparatus.

  Conventionally, a plant cultivation house (hereinafter referred to as “cultivation house”) has been used in order to eliminate the influence of wind and rain, etc. and to prepare a plant growth environment.

  Such a cultivation house is not preferable because the temperature in the house rises abnormally in the summer and various obstacles (for example, burnt leaves etc.) occur in the plant being cultivated. In addition, when the temperature is too low in winter, various troubles occur, which is not preferable. Therefore, cooling using ventilation, fine fog, an air conditioner, or heating using a boiler or an electric heater has been performed (see, for example, Patent Documents 1 and 2).

JP-A-9-210435 JP 2001-248981 A

By the way, in recent years, a completely enclosed cultivation house that can prevent pests and fungi from invading and enables pesticide-free cultivation has attracted attention. An inexpensive and suitable one is desired. For example, the above-described ventilation (that is, ventilation for lowering the temperature in the house) may induce the invasion of pests and fungi into the house, and the CO ₂ concentration in the house can be properly maintained. There is a risk that it will not be possible to increase plant yields. Moreover, if the fall of the temperature in a house by a fine fog is utilized, the humidity in a house will rise abnormally and it is not preferable on plant environment. In addition, it is conceivable to cool the interior space of the house without influencing the amount of CO ₂ and humidity by sending cool air from a commercially available air conditioner or air conditioner into the house. There is a problem that a large-scale facility such as an air conditioner (fan coil unit) is required and costs are increased.

  An object of the present invention is to provide a hydroponic cultivation apparatus that solves the above-described problems.

The invention according to claim 1 is illustrated in FIG. 1 and FIG. 2, and is formed in a shelf shape so that a plant (4) to be cultivated can be placed, and can store a nutrient solution (20). Cultivation shelf (3) arranged above the possible nutrient solution tank (2, 12),
Nutrient solution temperature adjusting means (6, 16) capable of adjusting the temperature of the nutrient solution (20) to an appropriate temperature by heating or cooling the nutrient solution (20) in the nutrient solution tank (2, 12);
It is comprised by the ventilation fan (90) and the ventilation path (91) connected to this ventilation fan (90), and an upper end opening (9a) is opened to the space (A1) above the said cultivation shelf (3). And air circulation means (9) in which the lower end opening (9b) is opened in the space (A2) below the cultivation shelf (3),
A communication path (10) communicating the space (A1) above the cultivation shelf (3) and the space (A2) below the cultivation shelf (3);
With
The cultivation shelf (3) has at least one first through hole (30) penetrating vertically, and the root (40) of the plant (4) placed on the cultivation shelf (3). The present invention relates to a hydroponic cultivation apparatus (1, 11) configured to extend downward through the first through hole (30).

  The invention which concerns on Claim 2 is equipped with the nutrient solution tank (2, 12) which can store the nutrient solution (20) while being arrange | positioned under the said cultivation shelf (3) in the invention which concerns on Claim 1. It is characterized by that.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the nutrient solution (2, 12) is nutrient solution up to a height that does not contact the lower surface (3a) of the cultivation shelf (3). (20) is stored, and a gap (8) is formed between the lower surface (3a) of the cultivation shelf (3) and the liquid surface of the nutrient solution (20).

  The invention according to claim 4 is illustrated in FIG. 3 and FIG. 4, and in the invention according to any one of claims 1 to 3, the lower end portion is in the nutrient solution tank (2, 12). It is soaked in the stored nutrient solution (20) and arranged so that its upper end protrudes from the liquid level of the nutrient solution (20). The space (A2) above the nutrient solution (20) and the nutrient solution (20 The heat exchange means (13, 23) for facilitating heat exchange with the apparatus is provided.

  The invention according to claim 5 is the invention according to claim 4, wherein the upper end portion (23a) of the heat exchange means (23) passes through the second through hole (31) formed in the cultivation shelf (3). Projecting above the cultivation shelf (3).

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein one or a plurality of pipes (P ₁ , P ₂ , P ₃ , P ₁₁ , P ₁₂ , P ₂₁ , P ₂₂ , P ₃₁₁ , P ₃₁₂ , P ₃₂ , P ₄₁ , P ₄₂₁ , P ₄₂₂ ) and a fluid having a predetermined temperature to the pipe (P ₁ ,...) A fluid supply unit (264, 364, 464, 564, 664, 764), and temperature adjusting means (26, 36, 46, 56, 66, 76) comprising:
It arrange | positions so that the 1st pipe part (261,361,461,561,661a, 661b, 761) which is at least one part of the said pipe may be immersed in the nutrient solution (20) stored in the said nutrient solution tank (2). And
A second pipe portion (262, 362, 462, 562, 662, 762a, 762b) which is at least a part of the pipe is a space (A1, A2) above the nutrient solution (20), and Arranged at a position facing the pipe part (261, ...),
These pipe portions are characterized in that fins (263, 363, 463, 563, 663, 763) for heat exchange are passed over.

  The invention according to claim 7 is the invention according to claim 6, characterized in that the pipe portions (261,...) And the fins (263,...) Are made of a material having good thermal conductivity.

The invention according to claim 8 is the hydroponic cultivation apparatus (1, 11) according to any one of claims 1 to 7,
The present invention relates to a hydroponic cultivation facility (B1, B2) including a cultivation house (7) in which at least the cultivation shelf (3) and the nutrient solution tank (2, 12) are installed.

  Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.

According to the invention which concerns on Claims 1 thru | or 3 and 8, since the root of the plant mounted in the said cultivation shelf extends below through the said 1st through-hole, and is immersed in a nutrient solution, cultivating a plant Can do. Further, the nutrient solution is adjusted to an appropriate temperature (for example, about 10 ° C.) by the nutrient solution temperature adjusting means, and the air in the cultivation house (that is, below the cultivation shelf) by the air circulation means and the communication path. Air and the upper air) are circulated, so that the air that has been appropriately heated by heat exchange with the nutrient solution in the space below the cultivation shelf is placed in the space above the cultivation shelf. Will be sent. Thereby, the environmental temperature of both the root and leaf of a plant becomes suitable temperature, and a plant can be grown favorably. Furthermore, since the temperature in the house can be lowered without ventilation, it is possible to prevent the invasion of pests and fungi, and it is possible to expect an increase in plant yield by maintaining the CO ₂ concentration in the house appropriately. Furthermore, since the cooling by the fine mist is not performed, the humidity in the house does not rise abnormally. Further, the equipment does not become large like a commercially available air conditioner or air conditioner, and the cost can be suppressed.

  According to the invention which concerns on Claim 4, the heat exchange between the said nutrient solution and the said space can be performed efficiently.

  According to the invention which concerns on Claim 5, since the temperature of a nutrient solution is transmitted to the upper space of a cultivation shelf by both the above-mentioned air circulation and the said heat exchange means, it makes the temperature of the air of this upper space efficient and suitable temperature. Can do.

  According to the invention which concerns on Claim 6 and 7, the said nutrient solution is brought to desired temperature by the said 1st pipe part and the said fin (specifically, the part which adjoins the said 1st pipe part among this fin). The air above the nutrient solution can be cooled to a desired temperature by the second pipe part and the fin (specifically, a part of the fin adjacent to the second pipe part). The fins can reduce the temperature difference between the nutrient solution and the air by performing heat exchange with the fins.

FIG. 1 is a cross-sectional view showing an example of the structure of a hydroponic cultivation apparatus and hydroponic cultivation facility according to the present invention. FIG. 2 is a sectional view showing another example of the structure of the hydroponic cultivation apparatus and hydroponic cultivation facility according to the present invention. FIG. 3 is a cross-sectional view showing another example of the structure of the hydroponic cultivation apparatus and hydroponic cultivation facility according to the present invention. FIG. 4 is a cross-sectional view showing another example of the structure of the hydroponic cultivation apparatus and hydroponic cultivation facility according to the present invention. FIG. 5 is an enlarged perspective view showing an example of the structure of the upper end portion of the heat exchange means. FIG. 6 is a cross-sectional view showing an example of the configuration of the temperature adjusting means. FIG. 7 is a perspective view showing an example of the appearance of the temperature adjusting means of FIG. FIGS. 8A to 8C are cross-sectional views showing other examples of the configuration of the temperature adjusting means. 9A and 9B are cross-sectional views showing another example of the configuration of the temperature adjusting means.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

The hydroponic cultivation apparatus according to the present invention is illustrated by reference numeral 1 in FIG. 1, and includes a cultivation shelf 3 disposed above a nutrient solution tank 2 in which a nutrient solution 20 can be stored. This cultivation shelf 3 is formed in a shelf shape so that the plant 4 to be cultivated can be placed.
-A plate-like member for placing plants (for example, a plate member made of a resin plate such as polystyrene foam or a material other than resin)
・ Container for holding soil for planting, rock wool, etc. (like a planter)
It is formed with. In other words, the shelf shape in the present specification means any member (a plate-like member or container) so that an object (that is, a plant, soil, rock wool, or the like) can be placed (so that the object does not fall). Is the state where it is laid flat. The cultivation shelf 3 has at least one first through hole 30 penetrating vertically, and the root 40 of the plant placed on the cultivation shelf 3 passes through the first through hole 30. It is comprised so that it can extend below. The number of the first through holes 30 may be the same as or more than the number of the plants 4 placed on the cultivation shelf 3. When a plate-like member (such as a polystyrene foam resin plate) is used for the cultivation shelf 3 as described above, the plant 4 to be cultivated does not fall and has a hole with a diameter that allows the root 40 of the plant 4 to pass through. When the container for holding the soil is used as the cultivation shelf as described above, the hole is formed so that the soil does not easily fall and the root 40 of the plant 4 can easily pass through. Just keep it. Moreover, although the cultivation shelf 3 shown in FIG. 1 is supported by the support pillar 5 arrange | positioned in the nutrient solution tank 2, of course, it is not restricted to this, It seems to support by other means (for example, float). It is good to make it.

Furthermore, the hydroponic cultivation apparatus 1 according to the present invention can adjust the temperature of the nutrient solution 20 to an appropriate temperature (for example, about 10 ° C.) by heating or cooling the nutrient solution 20 in the nutrient solution tank 2. A nutrient solution temperature adjusting means 6 is provided. As this nutrient solution temperature adjusting means 6,
・ Cooling equipment such as general screw-type refrigerators, turbo-type refrigerators, air-cooled or water-cooled heat pump chillers ・ Heating equipment such as electric heaters ・ Electric equipment that can be cooled and heated ・ Low-temperature groundwater or high-temperature Some means of adjusting the temperature of nutrient solution using groundwater (hot spring) of In FIG. 1, the nutrient solution temperature adjusting means 6 is disposed outside the nutrient solution tank 2 (that is, outside the cultivation house 7), and the nutrient solution 20 is cooled or added outside the nutrient solution tank 2. However, as shown in FIG. 2, the nutrient solution temperature adjusting means 16 is arranged inside the nutrient solution tank 12 so that the nutrient solution 20 is cooled and heated inside. May be. In the case of FIG. 1, a heat storage tank (stored in a liquid such as water or a solid such as concrete) is provided in the nutrient solution temperature adjusting means 6 and the nighttime power is used to store the heat storage tank. Cooling or heating may be performed, and in the case of FIG. 2, the nutrient solution tank 12 may be enlarged and the nutrient solution tank 12 itself may be used as a heat storage tank.

  In addition, although the above-mentioned hydroponic cultivation apparatus 1 and 11 may be comprised using the existing nutrient solution tank (that is, the above-mentioned cultivation shelf 3 is installed above the existing nutrient solution tanks 2 and 12). However, if a nutrient solution tank is not already installed, a new nutrient solution tank (a nutrient solution tank that can store the nutrient solution) is placed below the cultivation shelf 3 to construct a hydroponic cultivation apparatus. You may do it. In addition, even if it is an existing nutrient solution tank or a new nutrient solution tank, the nutrient solution 20 is accumulated to the height which does not contact the lower surface of the said cultivation shelf 3, and the lower surface 3a of this cultivation shelf 3 It is good to form the space | gap part 8 between this and the liquid level of this nutrient solution 20. FIG. In that case, the height dimension H of the space 8 is preferably set to a dimension that allows the roots of the plants 4 to be sufficiently immersed in the nutrient solution 20.

Furthermore, the hydroponic cultivation apparatuses 1 and 11 according to the present invention are:
A blower fan 90;
An air passage 91 communicated with the blower fan 90;
The upper air opening 9a of the air circulation means 9 is opened in the space A1 above the cultivation shelf 3, and the lower opening 9b of the air circulation means 9 is the cultivation shelf 3. Is opened in a space A2 below. In this case, even if the blower fan 90 is driven to send air from the space A1 above the cultivation shelf 3 to the space A2 below, conversely, from the space A2 below the cultivation shelf 3 to the space A1 above. Either way of sending air. In the example shown in FIG. 1 and FIG. 2, the blower fan 90 is disposed above the cultivation shelf 3 inside the cultivation house 7, and the air passage 91 extends from the lower end of the ventilation fan 90 to the cultivation shelf 3. Although it arrange | positions so that it may penetrate, of course, it is not restricted to this, Various other structures are not excluded from the scope of the present invention. For example, the blower fan may be disposed inside the cultivation house 7 and below the cultivation shelf 3 (for example, the gap portion 8), and in both the lower space A2 and the upper space A1 of the cultivation shelf 3. You may arrange | position so that it may extend, or you may arrange | position outside the cultivation house 7. FIG. Further, the air passage may be disposed only on the upper side of the blower fan 90 or on both the upper and lower sides, and the wall of the cultivation house 7 is penetrated without penetrating the cultivation shelf 3. May be arranged. Furthermore, in the example shown in FIG.1 and FIG.2, although the lower end opening 9b of the air circulation means 9 is arrange | positioned in the substantially same height as the lower surface 3a of the cultivation shelf 3, it is in the position lower than the lower surface 3a of the cultivation shelf 3. It may be arranged. For example, the lower end opening of the air circulation means may be opened in the nutrient solution so that the air sent out by the blower fan 90 is blown out in the form of bubbles.

  On the other hand, the hydroponic cultivation apparatuses 1 and 11 according to the present invention include the communication passage 10 that communicates the space A1 above the cultivation shelf 3 and the space A2 below, and the air circulation means 9 and the above-described The air in the cultivation house can be circulated by the communication passage 10. In addition, although the communication path 10 shown in FIG.1 and FIG.2 is formed in the said cultivation shelf 3, of course, it is not restricted to this, It forms in the clearance gap between the wall part of the cultivation house 7, and the end surface of the cultivation shelf 3. Alternatively, a dedicated duct may be arranged to form a communication path.

According to the present invention, since the root 40 of the plant 4 placed on the cultivation shelf 3 extends downward through the first through hole 30 and is immersed in the nutrient solution 20, the plant 4 can be cultivated. . Further, the nutrient solution 20 is adjusted to an appropriate temperature (for example, about 10 ° C.) by the nutrient solution temperature adjusting means 6, 16, and the air in the cultivation house (the air circulation means 9 and the communication path 10 described above) In other words, since the air below the cultivation shelf 3 and the air above the circulation are circulated, the temperature was adjusted to an appropriate temperature by heat exchange with the nutrient solution 20 in the space A2 below the cultivation shelf 3. Air will be sent to the space A1 above the cultivation shelf 3. Thereby, the environmental temperature of both the root 40 and the leaf of the plant 4 becomes an appropriate temperature, and the plant 4 can be grown well. Furthermore, since the temperature in the house can be lowered without ventilating, it is possible to prevent the invasion of pests and fungi, and it is possible to expect an increase in plant yield by maintaining the CO ₂ concentration in the house. Furthermore, since the cooling by the fine mist is not performed, the humidity in the house does not rise abnormally. Further, the equipment does not become large like a commercially available air conditioner or air conditioner, and the cost can be suppressed.

  Incidentally, as shown in FIG. 3, heat exchange is performed so that the lower end is immersed in the nutrient solution 20 stored in the nutrient tanks 2 and 12 and the upper end protrudes (exposes) from the liquid surface of the nutrient solution 20. Means (for example, fin-type heat exchanger) 13 may be arranged to promote heat exchange between the space A2 above the nutrient solution 20 and the nutrient solution 20. Thereby, heat exchange between the nutrient solution 20 and the space A2 can be performed efficiently. Moreover, as shown in detail in FIG. 4, the upper end portion 23 a of the heat exchange means 23 is a second through hole (a through hole other than the first through hole formed in the cultivation shelf 3, You may make it protrude above the said cultivation shelf 3 through the communicating path which also serves as a circulation path, or the through-hole which does not serve also as the circulation path of air) 31. In such a case, since the temperature of the nutrient solution 20 is transmitted to the upper space A1 of the cultivation shelf 3 by both the air circulation and the heat exchange means 23, the temperature of the air in the upper space A1 is efficiently and optimally temperatured. Can be. In that case, as indicated by reference numeral 24 in FIG. 5, it is preferable that a wind direction plate is appropriately provided at the upper end portion 23a of the heat exchange means 23 so that the wind direction can be changed.

On the other hand, hydroponic cultivation equipment B1, B2,.
・ Hydroponic cultivation devices 1 and 11 described above,
A cultivation house 7 in which at least the cultivation shelf 3 and the nutrient solution tanks 2 and 12 are installed;
Consists of. In this case, even if the roof or wall of the cultivation house 7 is made transparent or translucent and the plant 4 is cultivated by sunlight, the roof or wall of the cultivation house 7 is made opaque, Even if it grows with artificial light, either may be sufficient.

By the way, as illustrated in FIGS.
Pipes P ₁ and P ₂ ,
A fluid supply unit 264 that supplies fluid of a predetermined temperature to the pipes P ₁ and P ₂ ;
It is preferable to provide a temperature adjusting means 26 made of In that case, at least a part of the pipes P ₁ and P ₂ (referred to as “first pipe portion” in this specification as appropriate) 261 is disposed so as to be immersed in the nutrient solution 20 stored in the nutrient solution tank 2. In addition, at least a part of the pipes P ₁ and P ₂ (a part other than the first pipe part, and appropriately referred to as a “second pipe part” in this specification) 262 is located above the nutrient solution 20. (Referred to as the space A2 between the cultivation shelf 3 and the nutrient solution 20 or the space A1 above the cultivation shelf 3. The same applies hereinafter) and disposed at a position facing the first pipe portion 261. Good. Then, it is preferable that the heat exchange fins 263 be spanned between these pipe portions 261 and 262. Further, the pipe portions 261 and 262 and the fins 263 are preferably formed of a material having good thermal conductivity. If you do that,
-Cooling or heating the nutrient solution 20 to a desired temperature by the first pipe portion 261 and the fin 263 (specifically, a portion of the fin 263 that is close to the first pipe portion 261). Can
The air above the nutrient solution 20 is cooled to a desired temperature by the second pipe part 262 and the fin 263 (specifically, a part of the fin 263 that is close to the second pipe part 262) or Can be heated,
The heat difference between the nutrient solution 20 and the air can be reduced by the fins 263 to reduce the temperature difference therebetween.

6 and 7, the temperature adjusting means 26 has two pipes. However, the number of pipes is not limited to this, and the number of pipes is not limited to that of the temperature adjusting means 36 shown in FIG. 8 (a). as one, in the pipe _{P 3,}
A first pipe portion (that is, a portion arranged to be immersed in the nutrient solution 20 stored in the nutrient tank 2) 361;
A second pipe part (that is, a space A1 or A2 above the nutrient solution 20 and disposed at a position facing the first pipe part 261) 362,
May be formed.

Further, in the temperature adjusting means 26 shown in FIG. 6, the first pipe portion 261 is formed so that most of _one pipe P1 is soaked in the nutrient solution 20, but it is of course limited to this. rather, like the temperature adjusting means 46 shown in FIG. 8 (b), a portion of the pipe P ₁₁ may be formed a first pipe portion 461 is disposed so as immersed in the nutrient solution 20. Similarly, in the temperature adjusting means 26 shown in FIG. 6, one Most of the pipe P ₂ forms a second pipe portion 262 is disposed in the space A2, course limited to this Fig. 8 (c)
As the temperature adjusting means 56 shown in only a portion of the pipe P ₂₂ may be formed a second pipe portion 562 is disposed in the space A2. Further, in FIGS. 6 to 8, the first pipe portion is formed only at one place on one pipe, but of course, the present invention is not limited to this, and FIG. 9 (a)
The two pipes P ₃₁₁ and P ₃₁₂ may be formed at two locations as indicated by reference numerals 661a and 661b. Similarly, in FIG. 6 to FIG. 8, the second pipe portion is formed only at one place on one pipe, but of course it is not limited to this, and FIG. 9 (b)
The two pipes P ₄₂₁ and P ₄₂₂ may be formed at two locations as indicated by reference numerals 762a and 762b. Furthermore, the number of pipes may be four or more. That is, the temperature adjusting means in the present invention is preferably provided with one or a plurality of pipes, and the first pipe portion and the second pipe portion as described above are appropriately formed on the pipe.

DESCRIPTION OF SYMBOLS 1 Hydroponic cultivation apparatus 2 Nutrient tank 3 Cultivation shelf 3a Bottom surface of the cultivation shelf 4 Plant 6 Nutrient solution temperature adjustment means 7 Cultivation house 8 Cavity 9 Air circulation means 9a Upper end opening of air circulation means 9b Lower end opening of air circulation means DESCRIPTION OF SYMBOLS 10 Communication path 11 Hydroponic cultivation apparatus 12 Nutrient tank 13 Heat exchange means 16 Nutrient liquid temperature adjustment means 20 Nutrient liquid 23 Heat exchange means 23a Upper end part of heat exchange means 30 1st through-hole 31 2nd through-hole 40 Plant root 90 Blower fan 91 Ventilation path 26, 36, ... Temperature adjustment means 261, 361, ... First pipe part 262, 362, ... Second pipe part 263, 363, ... Heat exchange fins 264, 364, ... Fluid supply part A1 space below the upper space A2 cultivation racks cultivation shelves B1, B2 hydroponic equipment _{P 1,} P _2, ... pipe

Claims (8)

A cultivation shelf that is formed in a shelf shape so that plants to be cultivated can be placed, and is arranged above a nutrient solution tank that can store a nutrient solution, and
A nutrient solution temperature adjusting means capable of adjusting the temperature of the nutrient solution to an appropriate temperature by heating or cooling the nutrient solution in the nutrient solution tank;
An air formed by a blower fan and an air passage communicated with the blower fan, an upper end opening is opened in a space above the cultivation shelf, and a lower end opening is opened in a space below the cultivation shelf. Circulation means,
A communication path communicating the space above the cultivation shelf and the space below the cultivation shelf;
With
The cultivation shelf has at least one first through-hole penetrating vertically, and is configured so that the roots of the plant placed on the cultivation shelf can extend downward through the first through-hole. Was
Hydroponic cultivation apparatus characterized by that. While being arranged below the cultivation shelf, a nutrient solution tank capable of storing a nutrient solution,
The hydroponic cultivation apparatus according to claim 1, comprising: In the nutrient solution tank, the nutrient solution is stored up to a height that does not contact the lower surface of the cultivation shelf, and a gap is formed between the lower surface of the cultivation shelf and the liquid level of the nutrient solution.
The hydroponic cultivation apparatus according to claim 1 or 2, characterized in that. The lower end portion is immersed in the nutrient solution stored in the nutrient solution tank and the upper end portion is disposed so as to protrude from the liquid surface of the nutrient solution, and heat exchange between the space above the nutrient solution and the nutrient solution Promotes heat exchange means,
The hydroponic cultivation apparatus according to any one of claims 1 to 3, wherein the hydroponic cultivation apparatus is provided. The upper end of the heat exchange means is projected above the cultivation shelf through a second through hole formed in the cultivation shelf.
The hydroponic cultivation apparatus according to claim 4. A temperature adjusting means comprising one or a plurality of pipes and a fluid supply unit for supplying a fluid having a predetermined temperature to the pipes;
The first pipe part that is at least a part of the pipe is arranged so as to be immersed in the nutrient solution stored in the nutrient solution tank,
A second pipe part that is at least a part of the pipe is disposed in a space above the nutrient solution and facing the first pipe part;
These pipe parts were covered with heat exchange fins.
The hydroponic cultivation apparatus according to any one of claims 1 to 5, wherein The pipe part and the fin are formed of a material having good thermal conductivity.
The hydroponic cultivation apparatus according to claim 6. The hydroponic cultivation apparatus according to any one of claims 1 to 7,
A cultivation house in which at least the cultivation shelf and the nutrient solution tank are installed; and
Hydroponic cultivation equipment equipped with.

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