JP2009201456A - Ozone nutritious liquid producing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ozone nutritious liquid producing apparatus enabling easy acquisition of an ozone nutritious liquid of a desired concentration, and capable of avoiding ozone from scattering around. <P>SOLUTION: This ozone nutritious liquid producing apparatus includes dissolving ozone in a nutritious liquid, in which fertilizer is dissolved to be used for hydroponics, to obtain an ozone nutritious liquid. The apparatus has an ozone generating means 2 which forms in the inside an oxygen circulating passage for circulating oxygen and generates ozone by applying voltage to a part opposite to the oxygen circulating passage to discharge electricity, an ozone dissolving tank 4 which can afford enough space for a prescribed amount of a nutritious liquid, and an ozone supplying passage L2 which extends from the ozone generating means 2 and is connected to the ozone dissolving tank 4, and can supply ozone generated by the ozone generating means 2 to the ozone dissolving tank 4. The ozone nutritious liquid is obtained by dissolving ozone supplied from the ozone supplying passage L2 in the nutritious liquid in the ozone dissolving tank 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ozone nutrient solution generator for obtaining ozone nutrient solution by dissolving ozone generated by ozone generating means in a nutrient solution.

In hydroponic cultivation such as hydroponics (soilless cultivation without soil), it is said that the nutrient solution in which fertilizer is dissolved is given to plants, but ozone is not contained in the nutrient solution for the purpose of controlling the occurrence of diseases. It has been proposed to use water mixed therein (see Patent Document 1). That is, ozone water in which ozone is dissolved in water has a remarkable sterilizing and disinfecting effect, so that it can be disinfected against causative bacteria such as withering diseases. Such ozone water is obtained by applying a voltage to an opposing electrode to discharge it, generating ozone by circulating oxygen therebetween, and then dissolving the ozone in water.
JP 2002-191244 A

  However, in the case of generating ozone nutrient solution by mixing ozone water generated as described above with a nutrient solution, when trying to produce a large amount of ozone nutrient solution, the ozone concentration is remarkably lowered and the bactericidal effect is obtained. There was a possibility that it could not be obtained. Further, when ozone water is obtained, ozone is normally bubbled and dissolved in water, so that the ozone is scattered around and the working environment may be deteriorated.

  The present invention has been made in view of such circumstances, and it is possible to easily obtain an ozone nourishing liquid having a desired concentration and to generate an ozone nourishing liquid capable of avoiding ozone from being scattered around. To provide an apparatus.

  The invention according to claim 1 is an ozone nutrient solution generating device for obtaining ozone nutrient solution by dissolving ozone in a nutrient solution in which fertilizer is dissolved so that it can be used in nutrient solution cultivation. An ozone generating means for generating ozone by forming an oxygen flow passage to be circulated and generating a discharge by applying a voltage to a portion opposed across the oxygen flow passage and ozone dissolution capable of containing a predetermined amount of the nutrient solution A nutrient solution in the ozone dissolution tank, comprising a tank and an ozone supply path extending from the ozone generation means and connected to the ozone dissolution tank and capable of supplying ozone generated by the ozone generation means to the ozone dissolution tank In contrast, ozone supplied from the ozone supply path is dissolved to obtain an ozone nutrient solution.

  According to a second aspect of the present invention, there is provided the ozone nutrient solution generating apparatus according to the first aspect, wherein the ozone dissolving tank extends from an upper part of the ozone dissolving tank and is connected to the ozone generating means. A return flow path capable of being sent to the generation means is provided, and undissolved ozone can be circulated between the ozone dissolution tank and the ozone generation means by the return flow path and the ozone supply path.

  According to a third aspect of the present invention, in the ozone nutrient solution generating apparatus according to the second aspect of the present invention, the ozone nutrient solution generating apparatus extends from an oxygen inlet connected to an oxygen supply source and is connected to the middle of the return flow path. An oxygen supply path capable of supplying oxygen is provided in the oxygen flow path of the ozone generating means.

  According to the first aspect of the present invention, the ozone nutrient solution is obtained by dissolving the ozone supplied from the ozone supply path to the nutrient solution in the ozone dissolution tank, so that an ozone nutrient solution having a desired concentration can be easily obtained. In addition, ozone can be prevented from being scattered around.

  According to the invention of claim 2, since the undissolved ozone can be circulated between the ozone dissolution tank and the ozone generating means by the return flow path and the ozone supply path, the scattering of ozone to the surroundings can be avoided more reliably. In addition, the undissolved ozone can be reused, and the running cost of the apparatus can be reduced.

  According to the third aspect of the present invention, the oxygen can be supplied to the oxygen flow passage of the ozone generating means through the return flow path that extends from the oxygen inlet connected to the oxygen supply source and is connected to the middle of the return flow path. Since the oxygen supply path is provided, undissolved ozone together with oxygen is supplied to the ozone generating means, and ozone can be generated efficiently.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The ozone nutrient solution generator according to the present embodiment is for obtaining ozone nutrient solution by dissolving ozone in a nutrient solution in which fertilizer is dissolved so as to be used in nutrient culture. As shown, the ozone generating means 2, the ozone dissolution tank 4, the coolant storage tank 5, the oxygen supply path L 1 for supplying oxygen to the ozone generating means 2, and the ozone generated by the ozone generating means 2 are converted into ozone. The ozone supply path L2 for supplying to the dissolution tank 4, the nutrient solution supply path L4 connected to the ozone dissolution tank 4 and through which the nutrient solution flows, and the ozone in the ozone dissolution tank 4 connected to the ozone dissolution tank 4 It is mainly composed of an ozone nutrient solution discharge path L5 for discharging the nutrient solution, and flow paths L6 and L7 through which the coolant flows.

  In addition, the code | symbol L1a in a figure is connected with an oxygen supply source (oxygen cylinder etc.) not shown, L4a is connected with the cultivation tank of nutrient solution cultivation, and the nutrient solution in the said cultivation tank is introduce | transduced The nutrient solution inlet, symbol L5a is connected to the cultivation tank for nutrient solution cultivation, and indicates a discharge port through which the ozone nutrient solution is discharged into the cultivation tank, and symbol V2 in the middle of the nutrient solution supply path L4 is Shows the valve. Various components in the ozone nutrient solution generator are arranged in the housing 1.

  Hydroponic cultivation refers to cultivation without soil (soil-free cultivation), and includes, for example, hydroponics, solid medium cultivation, spray cultivation, and the like. Hydroponics mainly includes submerged hydroponics, NFT, and the like, and solid medium cultivation mainly includes inorganic medium cultivation and organic medium cultivation. Spray plowing includes spray hydroponic and spray plowing. In this invention, it can apply to any hydroponics.

  The ozone generating means 2 is composed of a triple tube type quartz tube, and as shown in FIGS. 2 and 3, is mainly composed of a first tubular member 2a, a second tubular member 2b and a third tubular member 2c. Yes. That is, the second tubular member 2b is formed so as to cover the outer periphery of the first tubular member 2a with a gap, and further the third tubular member 2c is formed so as to cover the outer periphery of the second tubular member 2b with a gap. The inside of the first tubular member 2a is the first coolant flow passage W1, the gap between the first tubular member 2a and the second tubular member 2b is the oxygen flow passage O, the second tubular member 2b and the third The gap between the tubular member 2c constitutes the second coolant flow passage W2.

  One end of the oxygen flow path O is connected to the return flow path L3 to which the oxygen supply path L1 is connected, and the other end is connected to the ozone supply path L2. In addition, electrodes (not shown) are formed at portions facing the oxygen flow path supply path O (that is, the first tubular member 2a and the second tubular member 2b), and a predetermined voltage is applied to these electrodes. The voltage application means 3 which can be connected is connected, and it is comprised so that discharge may be made in the oxygen flow path O by the application of the voltage by the said voltage application means 3. FIG.

Thereby, oxygen (O ₂ ) supplied from the oxygen supply path L1 via the return flow path L3 reacts by discharge in the process of flowing through the oxygen flow path O, and ozone (O ₃ ) is generated. The obtained ozone is discharged to the ozone supply path L2. On the other hand, the flow path L6 for introducing the cooling liquid is connected to the flow path L7 via the first cooling liquid flow path W1, the connection flow path L6a, and the second cooling liquid flow path W2, and flows through these flow paths. The ozone generating means 2 can be cooled by the coolant.

  Incidentally, the tip of the ozone supply path L2 is connected to an ejector 7 disposed in the nutrient solution supply path L4, as shown in FIG. 1, and the ozone generated by the ozone generating means 2 is fed through the ejector 7. It is configured to reach the ozone dissolution tank 4 together with the liquid. That is, the nutrient solution and ozone are mixed well by the ejector 7, ozone is dissolved in the nutrient solution to obtain an ozone nutrient solution, and a predetermined amount of the obtained ozone nutrient solution is stored in the ozone dissolution tank 4. It is. The ozone nutrient solution in the ozone dissolution tank 4 can be discharged from the discharge port L5a of the ozone nutrient solution discharge path L5, and is used for, for example, nutrient culture such as hydroponics.

  A return flow path L3 and an exhaust flow path L9 are extended from the upper part (air layer side) of the ozone dissolution tank 4, and a liquid level monitoring pipe L8 is extended upward from the lower part. . However, the return flow path L3 extends in the middle through the branch pipes L8a and L8b of the liquid level monitoring pipe L8 and is configured to communicate with the oxygen flow path O of the ozone generating means 2. A valve V4 is connected in the middle of the return flow path L3. As a result, when the valve V4 is opened, oxygen, ozone, etc. released into the gas layer of the ozone dissolution tank 4 are guided again to the oxygen flow passage O of the ozone generating means 2.

  Reference numerals 11 and V3 in the figure denote a pressure sensor and a valve connected to the exhaust flow path L9. With these, the pressure in the ozone dissolution tank 4 is monitored and the pressure is released in the initial stage of use of the apparatus. To get. Moreover, the front-end | tip of the exhaust flow path L9 is connected in the middle of the ozone nutrient solution discharge path L5.

  Furthermore, since the liquid level monitoring pipe L8 is connected to the middle of the return flow path L3 at the upper branch pipes L8a and L8b, the ozone nutrient solution in the ozone dissolution tank 4 is for some reason (on the same pipe as the raw water). For example, when the pressure of the inside of the ozone dissolution tank 4 suddenly increases due to the sudden closing of the solenoid valve or the like operating in the above-described manner, and even when it reaches the return flow path L3, it can be returned to the ozone dissolution tank 4. Yes. If the pressure in the ozone dissolution tank 4 becomes excessive, and the ozone nutrient solution does not return even after a predetermined time (preset time) has passed in the state where the return to the return flow path L3, the liquid level sensor 6 The system is configured to emit a signal to stop the entire apparatus for safety, and to sound an alarm or the like to notify an abnormality.

  Furthermore, a liquid level sensor 6 is disposed in the middle of the liquid level monitoring pipe L8. When the liquid level sensor 6 detects that the liquid level in the ozone dissolution tank 4 has risen above a predetermined level, oxygen level sensor 6 is provided. The valve V1 disposed in the middle of the supply path L1 is opened so that oxygen can be supplied to the oxygen flow path O of the ozone generating means 2. Thereby, the usage-amount of oxygen can be suppressed and ozone can be generated more efficiently.

  Further, a closed circulation channel is formed with the coolant flow passages W1 and W2 of the ozone generating means 2 as a part of the channel, and a coolant circulation channel capable of circulating and circulating the coolant is configured. . This cooling liquid circulation flow path includes flow paths L6 and L7, cooling liquid flow paths W1 and W2, and a cooling liquid storage tank 5, and the cooling liquid in the cooling liquid storage tank 5 is flow path L6 by the driving force of the pump P. Through the coolant flow passages W1 and W2, after cooling the ozone generating means 2, it returns to the coolant storage tank 5 through the flow path L7.

  In the middle of the coolant circulation path as described above (flow path L7), a radiator 8 capable of dissipating heat by exchanging heat between the coolant circulating in the coolant circulation path and the atmosphere by air blown from the fan 9. Is formed. That is, the radiator 8 has a narrow flow path and is formed in a lattice shape or the like to distribute the coolant, while the wind sent from the fan 9 driven by the motor M hits the radiator 8 and the coolant in the radiator 8 Is efficiently cooled.

  In addition, a temperature sensor 10 that detects the temperature of the coolant is disposed in the middle of the coolant circulation channel (the channel L7 and upstream of the radiator 8), and is detected by the temperature sensor 10. The motor M of the fan 9 is controlled based on the detected temperature. Thereby, the temperature of the coolant circulating through the cooling circulation channel can be set to an optimum value, and the ozone generating means 2 can be efficiently cooled.

  Here, the case where the ozone nutrient solution production | generation apparatus which concerns on this embodiment is applied to nutrient solution cultivation is demonstrated. For example, as shown in FIG. 4, a culture solution tank T1, a sterilization tank T2, and a return solution tank T3 are prepared, and the culture solution tank T1 and the cultivation tank Y are connected via a pump, and the return solution tank T3 and the cultivation solution are connected. The tank Y can be connected. In this case, the culture tank T1 and the sterilization tank T2, and the return liquid tank T3 and the sterilization tank T2 are connected via a pump, and the sterilization tank T2 and the ozone nutrient solution generator are connected. In addition, the code | symbol R in the same figure has shown the rock wool.

  Moreover, as shown in FIG. 5, while preparing the culture solution tank T1 and the return solution tank T3, and connecting the culture solution tank T1 and the cultivation tank Y via a pump, the return solution tank T3 and the cultivation tank Y are connected. It can be connected. In this case, culture tank T1 and this ozone nutrient solution production | generation apparatus, return liquid tank T3 and this ozone nutrient solution production | generation apparatus are each connected. In addition, the code | symbol R in the same figure has shown the rock wool.

  In addition, as shown in FIG. 6, a culture solution tank T4 is prepared, the culture solution tank T4 and the cultivation tank Y are connected, and the ozone nutrient solution generator is directly connected to the solvent tank T4. be able to. Further, as shown in FIG. 7, a culture solution tank T4 is prepared, the culture solution tank T4 and the cultivation tank Y are connected, and the ozone nutrient solution generator is connected in the middle of the return path of the nutrient solution. Can be interposed. In addition, the code | symbol S in FIG. 6, 7 has shown the styrene board.

Next, experimental results for showing the technical superiority of the present invention will be described.
(Experiment 1)
As shown in FIG. 8, a sample liquid that is regarded as a nutrient solution is accommodated in a tank Aa capable of accommodating a 250-liter nutrient solution, and an ozone nutrient solution generator (or a conventional ozone generator) and the tank Aa The experimental apparatus which formed the path | route Ad which can circulate with the pump P was prepared.

Tank Aa consists of a cylindrical tank with a diameter of 70 (cm) and a height of 86.5 (cm), and the sample solution is assumed to be a local nutrient solution for tomato solution cultivation. 0.005 (g / L) was dissolved and used (assuming a trace amount of dirt caused by organic matter, fertilizer, etc. that are harmless to plants). In addition, as fungi to be sterilized (test bacteria), 1 (mL) of conidial fungus suspension of tomato root rot wilt fungus 10 ⁵ (cells / L) was added per 1 (L) of water (hereinafter, test Called nutrient solution).

Example 1
The test nutrient solution introduced by the path Ac in the ozone nutrient solution generation apparatus according to the present embodiment was directly ozonized, and the nutrient solution was returned to the tank Aa by the route Ab. At this time, the nutrient solution in the center of the tank Ad is circulated through the path Ad by driving the pump P. And the nutrient solution was extract | collected with time in the collection site | part (alpha) of the liquid level vicinity (inside of nutrient solution) in the approximate center of the tank Ad, and the disinfection rate was measured. The temperature of the ozone nutrient solution was set to 26 ° C.

(Comparative Example 1)
Instead of the ozone nutrient solution generator, an ozone generator that can simply generate ozone (O ₃ ) is connected, and the ozone obtained by the ozone generator is supplied to the tank Aa into which the test nutrient solution enters via the route Ab. Supplied. The supplied ozone is released (bubbled) as bubbles from the tip of the path Ab. In this case, the nutrient solution does not return through the path Ac, but the circulation action of the path Ad by driving the pump P is maintained. And the nutrient solution was extract | collected with time in the collection site | part (alpha) of the liquid level vicinity (inside of nutrient solution) in the approximate center of the tank Ad, and the disinfection rate was measured. The temperature of the ozone nutrient solution was set to 21 ° C.

(Comparative Example 2)
As in Comparative Example 1, instead of the ozone nutrient solution generator, an ozone generator that can simply generate ozone (O ₃ ) is connected, and the ozone obtained by the ozone generator is tested through the path Ab. It was supplied to the tank Aa in which the liquid entered. The supplied ozone is released (bubbled) as bubbles from the tip of the path Ab. In this case, the nutrient solution does not return through the path Ac, but the circulation action of the path Ad by driving the pump P is maintained. And the nutrient solution was extract | collected with time in the collection site | part (alpha) of the liquid level vicinity (inside of nutrient solution) in the approximate center of the tank Ad, and the disinfection rate was measured. The temperature of the ozone nutrient solution was set to 23 ° C.

  In Example 1 and Comparative Examples 1 and 2, the nutrient solution at the collection site α was collected every 5 minutes, and the sterilization rate (%) was measured. The results are shown in FIG. As can be seen from this experiment, in Example 1, the sterilization rate in the nutrient solution reaches 100 (%) in a very short time, while those in Comparative Examples 1 and 2 have a sterilization rate of 100 (%). It takes a relatively long time to reach

(Experiment 2)
As shown in FIG. 10, in a tank Ba capable of storing 1800 liters of nutrient solution, a test nutrient solution that is regarded as a nutrient solution is accommodated, and an ozone nutrient solution generator (or a conventional ozone generator) and the tank An experimental apparatus was prepared in which paths Bb and Bc connecting Ba were formed and a path BAd that could be circulated by the pump P was formed.

The tank Ba is composed of cubic tanks having a length, width and height of 200 (cm), 100 (cm) and 100 (cm). Assuming a nutrient solution, 0.005 (g / L) of a commercially available powdered green tea (assuming organic substances, fertilizers, and traces of dirt harmless to plants) dissolved in water was used. In addition, as a fungus to be sterilized (sample fungus), 1 (mL) of a conidial fungus suspension of 10 ⁵ (units / L) of tomato root rot wilt fungus was added per 1 (L) of water (hereinafter, test culture Called liquid).

(Example 2)
The test nutrient solution introduced by the path Ac in the ozone nutrient solution generation apparatus according to the present embodiment was directly ozonized, and the nutrient solution was returned to the tank Ba via the path Bb. At this time, the nutrient solution in the center of the tank Ba is circulated through the path Bd by driving the pump P. Then, the nutrient solution was sampled with time at the sampling site β in the vicinity of the liquid level (inside the nutrient solution) at the approximate center of the tank Ba, and the sterilization rate was measured.

(Example 3)
The test nutrient solution introduced by the path Ac in the ozone nutrient solution generation apparatus according to the present embodiment was directly ozonized, and the nutrient solution was returned to the tank Ba via the path Bb. At this time, the nutrient solution in the center of the tank Ba is circulated through the path Bd by driving the pump P. Then, the nutrient solution was sampled over time at the sampling site γ in the vicinity of the liquid level (in the nutrient solution) at the end of the tank Ba, and the sterilization rate was measured.

(Comparative Example 3)
Instead of the ozone nutrient solution generator, an ozone generator that can simply generate ozone (O ₃ ) is connected, and the ozone obtained by the ozone generator is supplied to the tank Ba into which the test nutrient solution enters via the path Bb. Supplied. The supplied ozone is released (bubbled) as bubbles from the tip of the path Bb. In this case, the nutrient solution does not return through the path Bc, but the circulation action of the path Bd by driving the pump P is maintained. Then, the nutrient solution was sampled over time at the sampling site β in the vicinity of the liquid level (inside the nutrient solution) at the approximate center of the tank Bd, and the sterilization rate was measured.

(Comparative Example 4)
Instead of the ozone nutrient solution generator, an ozone generator that can simply generate ozone (O ₃ ) is connected, and the ozone obtained by the ozone generator is supplied to the tank Ba into which the test nutrient solution enters via the path Bb. Supplied. The supplied ozone is released (bubbled) as bubbles from the tip of the path Bb. In this case, the nutrient solution does not return through the path Bc, but the circulation action of the path Bd by driving the pump P is maintained. Then, the nutrient solution was sampled over time at the sampling site γ in the vicinity of the liquid level (in the nutrient solution) at the end of the tank Bd, and the sterilization rate was measured.

  In Examples 2 and 3 and Comparative Examples 3 and 4, the nutrient solution at the collection site β or γ was collected every 5 minutes, and the sterilization rate (%) was measured. The results are shown in FIG. As can be seen from this experiment, in Examples 2 and 3, the sterilization rate in the nutrient solution reached 100 (%) in a very short time, while in Comparative Examples 3 and 4, the sterilization rate 100 ( %) Not reached. Further, as can be seen from the comparison between Examples 2 and 3, the time for the sterilization rate to reach 100 (%) is substantially the same at the substantial center and at the end of the tank Ba, and uniform sterilization over the entire tank Ba. It can be performed.

(Experiment 3)
In the tank Aa containing 250 liters shown in FIG. 8, the collection site α ′ is set to about 5 (cm) above the collection site α, and in the ozone nutrient solution generating apparatus according to the present embodiment, as in Example 1. The test nutrient solution introduced by the route Ac was directly ozonized, and the nutrient solution was returned to the tank Aa by the route Ab. At this time, the nutrient solution in the center of the tank Ad is circulated through the path Ad by driving the pump P. And it measured with time about the ozone concentration (ppm) in sampling part (alpha) and (alpha) '.

  The experimental results of Experiment 3 are shown in FIG. A similar experiment was performed in the tank Ba shown in FIG. 10, and the ozone concentration (ppm) of the collection sites β, γ, β ′ (the collection site set to about 5 (cm) above the collection site β) over time was measured. Measured. The experiment is shown in FIG. As is clear from these experimental results, according to the present embodiment, the amount of ozone scattered in the outside air is extremely small, and the working environment for converting the nutrient solution into ozone can be remarkably improved.

  According to the above embodiment, the ozone supplied from the ozone supply path L2 is dissolved in the nutrient solution in the ozone dissolution tank 4 to obtain the ozone nutrient solution. Compared to those that dissolve the ozone water in the nutrient solution and those that dissolve ozone by bubbling, etc., the ozone nutrient solution of the desired concentration can be easily obtained, and the ozone is scattered around Can be avoided.

  In addition, according to the present embodiment, since the undissolved ozone can be circulated between the ozone dissolution tank 4 and the ozone generating means 2 by the return flow path L3 and the ozone supply path L2, the scattering of ozone to the surroundings is prevented. While avoiding more reliably, undissolved ozone can be reused and the running cost of the apparatus can be reduced.

  Furthermore, according to the present embodiment, the oxygen inlet L1a connected to the oxygen supply source is connected to the middle of the return flow path L3 and is connected to the oxygen flow path of the ozone generating means 2 via the return flow path L3. Since the oxygen supply path L1 capable of supplying oxygen is provided, undissolved ozone together with oxygen can be supplied to the ozone generating means 2 to efficiently generate ozone.

  Although the present embodiment has been described above, the present invention is not limited to this embodiment. For example, the embodiment includes a double-pipe ozone generating means instead of the triple-pipe type quartz tube, or other forms. You may apply to what comprises the ozone generation means. Further, the constituent elements of the coolant circulation channel may be any general-purpose component or may not include the coolant circulation channel.

  An ozone nutrient solution generating device for obtaining ozone nutrient solution by dissolving ozone in a nutrient solution in which fertilizer is dissolved to be used in nutrient solution cultivation, and an oxygen flow passage for circulating oxygen therein is formed. In addition, an ozone generating means for generating ozone by applying a voltage to a portion opposed across the oxygen flow path to discharge, an ozone dissolving tank capable of storing a predetermined amount of nutrient solution, and an ozone extending from the ozone generating means An ozone supply path connected to the dissolution tank and capable of supplying ozone generated by the ozone generation means to the ozone dissolution tank, and dissolves the ozone supplied from the ozone supply path to the nutrient solution in the ozone dissolution tank If it is an ozone nutrient solution generation device that obtains an ozone nutrient solution, it can also be applied to devices having different external shapes or those to which other functions are added.

Schematic which shows the structure of the ozone nutrient solution production | generation apparatus which concerns on embodiment of this invention. Longitudinal sectional view showing ozone generating means in the ozone nutrient solution generator Sectional view taken along line III-III in FIG. Schematic diagram showing a case where the present invention is applied to a rock wool plowing (circulation type) of a batch processing sterilization method, which is an embodiment of the present invention. Schematic diagram showing a case where the present invention is applied to a one-pass treatment sterilization type rock wool plowing (circulation type) Schematic diagram showing a case where the present invention is applied to a liquid-type hydroponic (circulation) type of batch processing sterilization method Schematic diagram showing a case where the present invention is applied to a one-pass processing sterilization type hydroponics (circulation) type Schematic diagram of the equipment used in the experiments to demonstrate the technical advantages of the present invention Graph as an experimental result to show the technical advantage of the present invention Schematic diagram of the equipment used in the experiments to demonstrate the technical advantages of the present invention Graph as an experimental result to show the technical advantage of the present invention Graph as an experimental result to show the technical advantage of the present invention Graph as an experimental result to show the technical advantage of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Ozone generation means 3 Voltage application means 4 Ozone dissolution tank 5 Coolant storage tank 6 Liquid level sensor 7 Ejector 8 Radiator 9 Fan 10 Temperature sensor 11 Pressure sensor O Oxygen flow path

Claims (3)

An ozone nutrient solution generating device for obtaining ozone nutrient solution by dissolving ozone in a nutrient solution in which fertilizer is dissolved to be used in nutrient solution cultivation,
An ozone generating means for generating ozone by forming an oxygen flow path through which oxygen is circulated and applying a voltage to a portion facing the oxygen flow path to discharge the oxygen flow path;
An ozone dissolution tank capable of storing a predetermined amount of the nutrient solution;
An ozone supply path that extends from the ozone generation means and is connected to the ozone dissolution tank, and is capable of supplying ozone generated by the ozone generation means to the ozone dissolution tank;
The ozone nutrient solution generator is characterized in that the ozone nutrient solution is obtained by dissolving the ozone supplied from the ozone supply path to the nutrient solution in the ozone dissolution tank.   A return flow path extending from an upper part of the ozone dissolution tank and connected to the ozone generation means and capable of sending undissolved ozone in the ozone dissolution tank to the ozone generation means, the return flow path and the ozone supply 2. The ozone nutrient solution generator according to claim 1, wherein undissolved ozone can be circulated between the ozone dissolution tank and the ozone generating means by a passage.   An oxygen supply path that extends from an oxygen inlet connected to an oxygen supply source, is connected to the middle of the return flow path, and can supply oxygen to the oxygen flow path of the ozone generating means via the return flow path. The ozone nutrient solution generator according to claim 2.

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