JPH09163887A - Apparatus for water culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize a buffering function in the ground and an environmental energy in water culture. SOLUTION: A bottom member 3 of a box body of a water culture apparatus is made of a waterproof non-adiabatic material, and the box body is placed on the ground surface or in the ground in a state closely being in contact therewith. Fountain water 5 is supplied to a rhizosphere 7 in the box body and the drain is gathered to a collecting passage 6. A nutritious liquid stored in a nutritious liquid tank 9 is sent to a fountain tube 4 by a pump 10, and it is circulated from the collecting passage 6 to the nutritious liquid tank 9. In the periphery of the box body, an underground heat storage part 13 is placed. Also in the periphery of the nutritious liquid tank, an underground heat storage tank 14 is placed. In daytime, the temperature in the box body is elevated. The heat is transmitted to the fountain water and accumulated in the underground heat storage part 13 placed in the periphery of the box body through the bottom member 3 of the box body, and the heat is also transmitted to the nutritious liquid tank 9 and accumulated in the underground heat storage part 14 placed in the periphery of the tank 9. This heat accumulation function also serves as cooling function on the rhizosphere. On the other hand, at night, heat is inversely released from the underground heat storage parts 13, 14 into the box body and the rhizosphere is warmed up. Thus, the stabilization of thermal environment in the box body and also the energy saving are enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydroponic device, and more particularly to a hydroponic device suitable for heat exchange with the ground or the ground.

[0002]

2. Description of the Related Art In many conventional hydroponic devices, the bottom surface is separated from the ground surface. A fountain-type hydroponic device (for example, Japanese Patent Application No. 6-9096) uses a heat insulating material for its bottom panel, although its bottom is in contact with the ground surface. That is, in these, the underground and the rhizosphere in the device have a non-adiabatic relationship.

[0003]

SUMMARY OF THE INVENTION In the above conventional configuration,
Since the heat capacity of the rhizosphere environment is small, the rhizosphere is easily affected by fluctuations in indoor air, and therefore, a large amount of artificial energy tends to be input in order to correct this fluctuation within an appropriate range. .

An object of the present invention is to provide a technique of a hydroponic device for reducing the artificial energy to be input as much as possible while utilizing the buffer function in the ground and the natural energy as much as possible.

[0005]

To achieve the above object, the present invention provides a fountain type hydroponic device for supplying a fountain flow to a rhizosphere of a plant body, wherein the rhizosphere and the ground or underground Between the two, a heat transfer means for transferring heat by a temperature difference between the two is provided. Further, the bottom member of the box in which the rhizosphere portion is housed is formed of a non-insulating member, and the bottom member is installed in close contact with the ground or the ground. Also,
A box containing the rhizosphere and a nutrient solution tank for supplying nutrient solution to the rhizosphere, and a fountain tube for supplying a fountain flow to the rhizosphere and the nutrient solution tank, A water collecting path, which is connected through a liquid supply forward path equipped with a pump for circulating a liquid, and collects the fountain flow supplied from the fountain tube, and the nutrient solution tank are connected through a liquid supply return path, and An underground heat storage section is formed around the bottom of the body and around the nutrient solution tank. Also, the box body is composed of respective panels of the top surface, the side surface, and the bottom surface, and the plant body is held by perforated portions at appropriate positions of the top panel, and the rhizosphere portion of the plant body is suspended in the box body, In a fountain-type hydroponic device having a fountain means for supplying a fountain flow to the rhizosphere above the bottom panel, the bottom panel is formed of a non-insulating material, and the bottom panel is closely attached to the ground or the ground. It is characterized by being installed.

According to the above construction, the ground and the rhizosphere of the hydroponic device are thermally coupled by the non-insulating member or the heat transfer means. That is, heat transfer occurs due to the temperature difference between the two. Therefore, it is a thermal buffering effect in the ground, and by positively utilizing this, for example, the residual heat of the rhizosphere is stored in the ground during the daytime, and the residual heat of the ground is used at night. There is an action such as releasing to. This thermal buffering effect is achieved by forming an underground heat storage part not only in the ground around the box housing the rhizosphere but also around the nutrient solution tank that circulates the nutrient solution to the rhizosphere. , More effective. In this way, the thermal environment in the box is stabilized and energy is saved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a box body of a fountain type hydroponic device according to an embodiment of the present invention. In FIG. 1, the box of this embodiment has a top panel 1 and a side panel 2, and a bottom member 3 is made of a non-adiabatic material having a waterproof property. The bottom surface member 3 is, for example, an ordinary agricultural plastic sheet, synthetic rubber sheet, or the like, and the thermal conductivity of the member is close to that in the ground, and is preferably larger than that.

Further, the plant has a plant upper part 8 above the top panel 1 and a rhizosphere 7 below, and a fountain flow 5 from a fountain tube 4 is applied to the rhizosphere 7 to collect the plant. It can be collected in the waterway 6. Further, the nutrient solution in the nutrient solution tank 9 is sent by the pump 10 to the fountain tube 4 via the solution feeding outward path 11, and returns to the nutrient solution tank 9 from the water collecting path 6 via the liquid feeding return path 12. Has become. Around the box body, there is an underground heat storage section 13 around the box body, and around the nutrient solution tank, there is an underground heat storage section 14 around the nutrient solution tank.

In such a structure, cultivation is as follows.
By operating the pump 10, the nutrient solution is supplied to the rhizosphere part 7 from the fountain tube 4 as the fountain flow 5 through the solution feeding path 11. At this time, from the viewpoint of transfer of heat,
During the daytime, when the outside of the box is hot, there is heat transfer through the side panel 2, which causes the inside of the box to rise in temperature and is transferred to the fountain flow.

A part of the heat is transferred to the underground heat storage section 13 around the box body through the bottom member 3 to be stored, and the other part of the heat is passed through the liquid supply outward path 12 to feed the nutrient solution. The heat is stored in the tank 9, and is further transferred to the underground heat storage unit 14 around the nutrient solution tank to store the heat. At the same time, the action of this heat storage is the action of cooling the rhizosphere of the box.

On the other hand, when the temperature outside the box is reduced at night, the above heat flow is reversed. That is, heat is radiated from the underground heat storage section 13 around the box body into the box body through the bottom surface member 3, and the rhizosphere is heated. These actions proceed moderately, which is preferable for plants.

If the rhizosphere temperature is still lower than the predetermined value, the pump 10 is operated to circulate the nutrient solution and supply thermal energy. At this time, first, the heat retained in the tank 10 is sent, and then the underground heat storage section 1 around the nutrient solution tank.
Heat is supplied to the tank 10 by heat transfer from the tank 4.

That is, the function of radiating heat from the ground is also the function of heating the inside of the box. When the box body is thermally insulated from the ground as in the conventional case, a large amount of heating energy needs to be input. Therefore, as in the present embodiment, if the method that positively utilizes the underground heat storage effect and solar heat,
A significant energy saving effect can be obtained.

On the other hand, when the temperature is high in summer, the underground temperature during the daytime is relatively low, so that the inside of the box is cooled. Further, when the tank water is forcibly cooled and the cooling operation is performed, this low-temperature energy is also stored in the underground heat storage part 13 around the box and the underground heat storage part 14 around the nutrient solution tank. And, at night, this heat is transferred to the box to exert a gentle cooling effect. In this way, by effectively utilizing the ground around the box and the nutrient solution tank, effective storage of cooling energy can be obtained. In addition, in FIG. 1, by increasing the amount of the liquid immersion by enlarging the portion of the bottom surface concave water collecting channel 6, the effect that the substantial amount of heat stored in the box is also increased, and the tank capacity is reduced. It is also possible to do.

FIGS. 2 and 3 are reference examples of the present invention, respectively, but since the box body is clearly thermally shielded from the ground by the heat insulating bottom member 15 and the like, the rhizosphere portion 7 is shown. Is susceptible to ambient temperature. Therefore, in order to control the environment in the box, a large amount of energy has to be input artificially and rapidly.

As described above, it is the basis of the present invention to appropriately utilize the buffering action of the earth and the natural energy, whereby not only the artificial energy to be added can be significantly reduced, but also the box body. It can stabilize the environment inside.

[0017]

As described above, according to the present invention, in the fountain type hydroponic device, the bottom of the box is made of a non-insulating member,
Moreover, since the bottom surface is installed on the ground or in the ground, the heat capacity in the box is substantially increased, and the cushioning function is improved. Therefore, while the utilization rate of natural energy increases, the utilization rate of artificial energy decreases, producing a significant energy saving effect. It also produces the effect of stabilizing the thermal environment in the box.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fountain-type hydroponic device that is an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional fountain type hydroponic device.

FIG. 3 is a sectional view of a conventional submerged hydroponic device.

[Explanation of symbols]

 1 Box top panel 2 Side panel 3 Bottom member 4 Fountain tube 5 Fountain flow 6 Water collection channel 7 Rhizosphere 8 Upper body 9 Nutrient solution tank 10 Pump 11 Liquid feed return path 12 Liquid feed return path 13 Ground heat storage area around the box 14 Underground heat storage part around nutrient solution tank 15 Insulating bottom member

Claims (10)

[Claims] 1. A fountain-type hydroponic device for supplying a fountain flow to a rhizosphere of a plant, wherein heat is transferred between the rhizosphere and the ground or the ground due to a temperature difference between the two. A hydroponic device characterized in that it is provided with a heat transfer means. 2. A fountain-type hydroponic device for supplying a fountain flow to a rhizosphere of a plant, wherein a bottom member of a box in which the rhizosphere is housed is constituted by a non-insulating member, and the bottom member is A hydroponic device characterized by being installed in close contact with the ground or the ground. 3. The hydroponic device according to claim 1, wherein the plant has the rhizosphere portion housed in a box body, and a plant upper body section is formed above the box body. 4. The hydroponic device according to claim 1, further comprising a fountain tube for supplying a fountain flow to the rhizosphere and a water collecting channel for collecting the supplied fountain flow. 5. The hydroponic device according to claim 1, further comprising a nutrient solution tank for supplying the nutrient solution to the rhizosphere. 6. The hydroponic device according to claim 1, wherein an underground heat storage section for a box body is formed in the surrounding ground where the bottom surface of the box body in which the rhizosphere portion is housed is in close contact. 7. A fountain tube for supplying a fountain flow to the rhizosphere and the nutrient solution tank, which comprises a box housing the rhizosphere and a nutrient solution tank for supplying the nutrient solution to the rhizosphere. Is connected via a liquid supply outward path equipped with a pump for circulating the nutrient solution, and a water collection path for collecting the fountain flow supplied from the fountain tube and the nutrient solution tank are connected via a liquid supply return path. The hydroponic device according to claim 1 or 2, which is connected. 8. The hydroponic device according to claim 7, wherein the nutrient solution tank has a non-adiabatic member at the contact portion with the ground or the ground. 9. An underground heat storage part around the box is formed in the surrounding ground where the bottom surface of the box comes into close contact, and in the surrounding ground where the nutrient solution tank comes into close contact therewith The hydroponic device according to claim 7, wherein a middle heat storage unit is formed. 10. A box body is constituted by respective panels of an upper surface, a side surface and a bottom surface, and a plant body is held by perforated portions at appropriate places of the top panel, and a rhizosphere portion of the plant body is suspended in the box body. Then, in the fountain-type hydroponic device, in which a fountain means for supplying a fountain flow to the rhizosphere is installed above the bottom panel,
A hydroponic device characterized in that the bottom panel is formed of a non-insulating material, and the bottom panel is installed in close contact with the ground or the ground.