KR20200119438A - Supplying apparatus for a liquefied fertilizer of Greenhouse - Google Patents

Abstract

According to an embodiment of the present invention, a device for supplying a nutrient solution in a greenhouse measures turbidity or acidity of the nutrient solution drained through a medium, estimates an absorption degree of the nutrient solution, selects the medium with poor absorption of the nutrient solution as a medium to be corrected, and provides uniform marketability of crops in the greenhouse by providing a corrected nutrient solution to the medium to be corrected. The device for supplying a nutrient solution in a greenhouse comprises: a plurality of mediums, a plurality of medium groups, a tank, a pump, a main line, a sub line, a drain line, a plurality of main valves, a plurality of sub valves, and a controlling unit.

Description

A nutrient solution supplying apparatus for a greenhouse {Supplying apparatus for a liquefied fertilizer of Greenhouse}

The present invention relates to a nutrient solution supply device for a greenhouse that enables nutrient solutions to be supplied to a plurality of mediums in the greenhouse.

In general, crops require nutrients, and other factors that affect crop growth may include sunlight, temperature, humidity, ventilation, and pests.

On the other hand, in recent years, as a smart farm is introduced to cultivate crops, a technology to remotely control or automatically control the environment of a greenhouse is being developed.

For example, in a smart farm, an illuminance sensor is provided in an arbitrary location inside a greenhouse, and the amount of sunlight is detected by the illuminance sensor. When the detected illuminance value is greater than the set illuminance amount, the control unit spreads a shielding film or turns off the light to block sunlight, and when the detected illuminance value is less than the set illuminance amount, the control unit walks on the shielding film or turns on the light to receive sunlight. I can.

In particular, a large greenhouse (a plant factory-type greenhouse called a facility house) is very large, and various types of structures exist on the upper side of the crop. Examples of structures include steel structures that form the framework of the walls and ceiling of the greenhouse, shielding and lighting facilities to control the illuminance, moisture supply facilities to supply moisture, drug spray facilities to prevent pests, and the interior of the greenhouse. There may be heating facilities for temperature control.

On the other hand, in the case of such a large greenhouse, dozens of badges are arranged, and the amount of sunlight may be insufficient because a shadow is formed on the badge of a specific area by the facilities described above. In addition, depending on where the medium is placed in the interior space of the greenhouse, there may be areas with poor ventilation. In addition, when supplying the nutrient solution, the nutrient solution pressure difference may occur depending on the distance from the pipe to the pump, and thus, the nutrient solution may not be sufficiently supplied to the medium where the nutrient solution pressure is low.

On the other hand, a medium located in a place where the amount of sunlight is insufficient or temperature, humidity, etc. is not appropriate, will inevitably slow the growth of the crop, and if the growth of the crop is slow, the absorption of nutrients may not be smooth.

The conventionally known smart farm-type greenhouse treats the cultivation environment of a specific area where the sensor is located inside the greenhouse, for example, a sunlight sensor, a temperature sensor, a humidity sensor, etc. as the cultivation environment of the greenhouse. .

Therefore, in the case of cultivating crops using conventionally known smart farms, the growth of the crop may be slow or the commodity value of the crop may be low in the medium at a specific location, and the product value of the crop may vary when harvesting the crop at a similar time. It can happen largely.

On the other hand, you can install a camera inside the greenhouse and use the camera to observe the growth of the crop, but in this case, the crop can only be observed only in the location and direction where the camera is installed, and there is an observation blind spot. There is a problem.

Republic of Korea Patent Publication No. 10-2010-0074868 (2010.07.02.) Republic of Korea Patent Publication No. 10-2012-0052469 (2012.05.24.) Korean Patent Application Publication No. 10-2017-0110243 (2017.10.11.) Republic of Korea Patent Publication No. 10-2013-0049567 (2013.05.14.) Republic of Korea Patent Publication No. 10-1728235 (2017.04.12.) Republic of Korea Utility Model Publication No. 20-0447966 (2010.02.26.)

Therefore, the technical problem to be achieved by the present invention is to select a specific medium with poor growth of crops to correct nutrient solution so that the crops in the greenhouse can grow uniformly, and that the crops can be cultivated to have uniform marketability. Its purpose is to provide a nutrient solution supply device for a greenhouse.

A nutrient solution supply device for a greenhouse according to an embodiment of the present invention for achieving the above technical problem comprises: a plurality of mediums disposed inside the greenhouse and on which crops are grown; A plurality of medium groups comprising two or more and six or less of the plurality of mediums are selected to form a group: a tank filled with a nutrient solution or a corrected nutrient solution; A pump (2) for generating pressure to move the nutrient solution of the tank (1) to a selected medium from among the plurality of mediums; A main line (3) installed to move the nutrient solution from the tank (1) to the plurality of medium groups; A sub-line branched from and connected to the main line 3 and buried in each medium within the medium group so that the nutrient solution is supplied to each medium; A drain line 5 for recovering an excess nutrient solution that has not been consumed from each medium; A plurality of main valves disposed between the main line 3 and each of the plurality of medium groups to control the flow of nutrient solution to a specific medium group; A plurality of sub valves arranged in lines respectively connected to the plurality of mediums from each of the plurality of main valves to control the flow of nutrient solution to a specific medium; And a control unit configured to open a main valve selected from among the plurality of main valves for a set time and close the other main valves in a state in which all the sub valves are open, and control the selected main valve to be sequentially selected from the plurality of main valves ( 7); includes,

When there is a medium requiring nutrient solution correction, the control unit 7 selects a specific medium from among a plurality of mediums regardless of the plurality of medium groups, and the main valve and the sub valve of the nutrient solution movement path connected to the selected medium are It includes controlling to be open and the rest closed.

In addition, the control unit 7 of the nutrient solution supplying device of the greenhouse according to an embodiment of the present invention, if the number of media for correcting the nutrient solution is greater than or equal to the set number, It may be set and controlled such that a main valve and a sub valve of a nutrient solution movement path for performing nutrient solution correction among the plurality of correction groups are opened, and the remaining main valves and sub valves are closed.

In addition, in the apparatus for supplying nutrients in a greenhouse according to an embodiment of the present invention, the set number may be determined according to the specifications of the pump.

In addition, the nutrient solution supply device of a greenhouse according to an embodiment of the present invention is installed at the rear end of each of the plurality of media among the lines connected to the drain line 5 at each of the plurality of media, A plurality of detection units for measuring turbidity or acidity of the nutrient solution may be further included, and a medium requiring nutrient solution correction may be selected based on the measured value of the turbidity or the acidity.

In addition, the nutrient solution supply device of a greenhouse according to an embodiment of the present invention is installed at the rear end of each of the plurality of detection units among lines connected from the plurality of detection units to the drain line 5 so that the nutrient solution flows back to the adjacent other medium. It may include a plurality of check valves to prevent the;

In addition, a nutrient solution supply device for a greenhouse according to an embodiment of the present invention includes a sub tank 1a to contain the corrected nutrient solution; And a sub-pump 2a disposed between the sub-tank 1a and the main line 3 to form pressure to supply the corrected nutrient solution to the medium requiring correction.

Details of other embodiments are included in the detailed description and drawings.

The nutrient solution supply device for a greenhouse according to an embodiment of the present invention made as described above can provide a corrected nutrient solution by selecting only a medium in which a crop with poor growth is grown among a plurality of media, thereby promoting the growth of a poor crop. The commodity value of the crop can be increased, and the quality of the crop can be uniform.

1 is a view for explaining a nutrient solution supply device of a greenhouse according to a comparative example.
2 is a view for explaining a nutrient solution supply device of a greenhouse according to an embodiment of the present invention.
FIG. 3 is a view showing an extract of a specific medium group from a nutrient solution supplying device of a greenhouse according to an embodiment of the present invention, and is a view for explaining a path through which the nutrient solution passes to an individual medium.
4 is a flowchart illustrating an example in which a corrected nutrient solution is provided to a medium to be corrected by a nutrient solution supplying device of a greenhouse according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are illustratively shown to aid understanding of the present invention, and it should be understood that the present invention may be variously modified and implemented differently from the embodiments described herein. However, in describing the present invention, when it is determined that a detailed description of a related known function or component may unnecessarily obscure the subject matter of the present invention, the detailed description and detailed illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to scale to aid understanding of the invention, but the size of some components may be exaggerated.

Meanwhile, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

On the other hand, terms to be described later are terms set in consideration of functions in the present invention and may vary according to the intention or custom of the producer, so the definition should be made based on the contents throughout the present specification.

The same reference numerals refer to the same elements throughout the specification.

Hereinafter, an apparatus for supplying nutrients for a greenhouse according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 is a view for explaining a nutrient solution supply device of a greenhouse according to a comparative example. 2 is a view for explaining a nutrient solution supply device of a greenhouse according to an embodiment of the present invention. FIG. 3 is a view showing an extract of a specific medium group from a nutrient solution supplying device of a greenhouse according to an embodiment of the present invention, and is a view for explaining a path through which the nutrient solution passes to an individual medium. 4 is a flowchart illustrating an example in which a corrected nutrient solution is provided to a medium to be corrected by a nutrient solution supplying device of a greenhouse according to an embodiment of the present invention.

<Comparative Example>

First, an apparatus for supplying nutrients in a greenhouse according to a comparative example will be described with reference to FIG. 1.

The nutrient solution supply device of a greenhouse according to the comparative example includes a tank 1, a pump 2, a main line 3, a sub-line 41, 42, ... 4n, a drain line 5, a medium group, a medium, And it may be configured to include a main valve.

The medium can be placed inside the greenhouse, and crops can be grown. About 6 badges can form a group. For example, as shown in FIG. 1, the 11th to 16th badges A11, A12, A13, A14, A15, A16 may be included in the first badge group A1. Similarly, the 21st to 26th badges A21, A22, A23, A24, A25, A26 may be included in the second badge group A2. That is, the nth badge group An may be configured to include the n1th to n6th badges An1, An2, An3, An4, An5, and An6.

That is, the badge group may be configured to include two or more badges. Also, the number of badge groups may be limited to the number that can be controlled by the controller 7, and for example, the number of badge groups may be 12 or less.

The tank 1 may store a nutrient solution, and the nutrient solution is for supplying the nutrient solution to a medium disposed inside the greenhouse. The nutrient solution has a basic turbidity and acidity, and may be determined according to the growth state of the crop, and may reflect the average state of the current crop growth.

The pump 2 may generate pressure to move the nutrient solution of the tank 1 to a selected medium among the plurality of mediums.

The main line 3 may be a path installed to move the nutrient solution discharged by the pump 2 to each medium group A1, A2,… An.

The sub-lines 41, 42… 4n may be branched and connected from the main line 3, and are arranged on a path connected from the main line 3 to each discharge group A1, A2, …… An It may be, and is buried in each of the medium so that the nutrient solution is supplied to each of the medium.

The drain line 5 recovers the excess nutrient solution that has not been consumed in each medium.

Main valves (V1, V2,… Vn) may be provided in plural, and are disposed between the main line 3 and each of the plurality of medium groups (A1, A2, …… An) so that the nutrient solution is a specific medium You can control the flow in groups (A1, A2, …… An).

The control unit 7 according to the comparative example opens the main valve selected from among the plurality of main valves V1, V2,… Vn for a set time and closes the remaining main valves. Thereafter, the control unit 7 moves the nutrient solution stored in the tank 1 by operating the pump 2. The nutrient solution passes through the open main valve via the main line 3 and is supplied to the medium group connected to the main valve.

For example, when the first medium group A1 is selected, the first main valve V1 is opened, whereby the nutrient solution can be supplied to the first medium group A1. A part of the nutrient solution is absorbed or consumed in the first medium group A1, and the excess nutrient solution is discharged along the drain line 5 to be recovered. On the other hand, since the eleventh to sixteenth mediums A11 to A16 belong to the first medium group A1, nutrient solutions of the same component are commonly passed through.

The control unit 7 opens the first main valve V1 for a predetermined time enough to complete supply of the nutrient solution to the first medium group A1, and closes the first main valve V1 after a predetermined time. , By opening the second main valve V2, the nutrient solution is supplied to the second medium group A2.

As described above, the nutrient solution supplying apparatus for a greenhouse according to the comparative example can provide a single type of nutrient solution to a specific medium group.

However, the nutrient solution supply device of another greenhouse in Comparative Example has the following problems.

When feeding the nutrient solution to a specific group of media, the nutrient solution is supplied to approximately six media. The time to supply nutrient solution to one medium group is approximately 1 hour or less. On the other hand, a greenhouse is a large-scale cultivation of crops, and there may be several groups of medium in the greenhouse.

On the other hand, even if it is desired to supply nutrient solutions to a larger number of mediums at once, the number of mediums that can be provided at a time is about 6 because the performance of the pump 2 is limited.

That is, it takes a whole day to provide the nutrient solution to the entire medium provided in the greenhouse by using the nutrient solution supply device of the greenhouse according to the comparative example.

In addition, even if the medium belongs to the same group, the medium may have a different cultivation environment than other adjacent mediums. For example, a shadow may be generated by various facilities such as a steel structure, an automatic moisture supply device, a sun protection device, etc., and a crop of a medium placed in such a shadow may be slow to grow. In addition, even in temperature and ventilation, even inside the same greenhouse, there is inevitably a difference, and for this reason, the growth of crops varies from medium to medium.

Therefore, it is necessary to supply additional nutrients to the medium where the growth of the crop is slow, or to supply the corrected nutrient solution correcting the nutrient concentration.

However, the nutrient solution supply device of the greenhouse according to the comparative example cannot selectively supply the corrected nutrient solution only to a specific medium within a specific medium group, and the nutrient solution must be supplied to the medium group to which a specific medium that needs correction belongs, thereby supplying nutrient solution. Energy can be wasted.

Therefore, the nutrient solution supplying apparatus of a greenhouse according to the comparative example is required a method of selectively selecting a medium requiring nutrient solution correction to perform nutrient solution correction.

<Example>

The apparatus for supplying nutrients in a greenhouse according to an embodiment of the present invention is an improvement of the comparative example described above, and describes the configuration added or modified to the comparative example, explains the effect, and a detailed description of the overlapping configuration Is omitted.

The nutrient solution supply device of a greenhouse according to an embodiment of the present invention includes a tank 1, a pump 2, a main line 3, a sub line 41, 42,… 4n, a drain line 5, and a medium. It may be configured to include a group, a badge, a main valve, and a sub valve.

A plurality of badge groups A1, A2,… An may be provided, and 2 or more and 6 or less badges may belong to the corresponding badge group.

The tank 1 may be filled with a general nutrient solution, and the corrected nutrient solution may be filled according to the will of the manager.

The main line 3 may be a line installed so that the nutrient solution moves from the tank 1 to the plurality of medium groups A1, A2,… An.

The sub-lines 41, 42… 4n are branched and connected in the main line 3, and can be embedded in each of the mediums within the medium group, so that the nutrient solution is supplied to each of the mediums.

Since six badges belong to the first badge group A1, eleventh to sixteenth badges A11 to A16 may be provided. In addition, the 21st to 26th badges A21 to A26 may also be provided in the second badge group A2. Likewise, the n1th to n6th badges An1 to An6 may be provided in the nth badge group An.

The drain line 5 recovers the excess nutrient solution that has not been consumed in each medium.

The main valves V1, V2,… Vn may be provided in plural, and may be disposed between the main line 3 and each of the plurality of discharge groups A1, A2, …… An. The main valves V1, V2,… Vn are controlled to open and close, so that the nutrient solution flows to a specific medium group A1, A2, …… An.

As shown in FIGS. 2 and 3, the sub-valve may be disposed on a line connected to the plurality of media at each of the plurality of main valves V1, V2,… Vn. As the sub-valve is opened and closed, it is possible to control the flow of the nutrient solution to a specific medium. Meanwhile, the sub-valve may be installed in a one-to-one correspondence with the medium, and the number of the sub-valve may be the same as the number of the medium.

In more detail with respect to the sub-valve, as shown in FIG. 2, since the first badge group A1 has six badges, the 11th to 16th sub-valves V11 to V16 may be provided. have. In addition, the second medium group A2 is also provided with a sub-valve for each medium, and the second medium group A2 may be provided with the 21st to 26th sub-valves V21 to V26. Likewise, the n1 th to n6 th sub valves Vn1 to Vn6 may be provided in the n th discharge group An.

The control unit 7 according to the nutrient solution supply device of the greenhouse according to an embodiment of the present invention, in a state in which all the sub-valves are open, the main valve selected from the plurality of main valves (V1, V2, ... Vn) Open for a set time and close the rest of the main valve. This makes it possible to supply the nutrient solution to the selected medium group.

In addition, the control unit 7 may control a plurality of main valves V1, V2,… Vn to be sequentially selected. Accordingly, when the supply of the nutrient solution to a specific medium group is completed, the nutrient solution can be supplied to the next sequential medium group.

In particular, the control unit 7 of the nutrient solution supplying device of a greenhouse according to an embodiment of the present invention, when there is a medium requiring nutrient solution correction, a specific medium can be selected from a plurality of medium regardless of the plurality of medium groups. have. In addition, the control unit 7 may control the main valve and the sub-valve of the nutrient solution movement path connected to the selected medium to be opened, and the rest are closed.

That is, the nutrient solution supplying device of a greenhouse according to an embodiment of the present invention can selectively provide nutrient solution by specifying a medium in a place where the growth of crops is slow, whereby the quality of crops grown inside the same greenhouse is You can choose.

For example, if the medium requiring nutrient correction is the eleventh medium (A11), the 21st medium (A21), the 24th medium (A24), and the n5th medium (An5), the control unit 7 is Control to open the nth main valves V1, V2, Vn, and open the 11th sub-valve V11, the 22nd sub-valve V22, the 24th sub-valve V24, and the n5th sub-valve Vn5 do. Thereby, the nutrient solution can be provided by selectively supplementing the nutrient solution only in the selected specific medium.

On the other hand, the control unit 7 of the nutrient solution supplying apparatus of a greenhouse according to an embodiment of the present invention may set a group and sequentially control when the number of mediums for which nutrient solution correction is to be performed is greater than the set number.

That is, if the number of mediums for correcting the nutrient solution is greater than or equal to the set number, a plurality of correction groups are set with the number of mediums equal to or less than the set number.

Thereafter, the controller 7 may control such that the main valve and the sub valve of the nutrient solution movement path for correcting the nutrient solution among the plurality of correction groups are opened, and the remaining main valve and the sub valve are closed.

Therefore, the nutrient solution supply device of a greenhouse according to an embodiment of the present invention can discharge nutrient solution within the durability performance of the pump 2 when performing nutrient solution correction, thereby preventing an abnormal shortening of the life of the nutrient solution supply device. I can.

On the other hand, in the apparatus for supplying nutrients in a greenhouse according to an embodiment of the present invention, the set number may be determined according to the specifications of the pump. More specifically, when the number of media is large or the length of the media is extremely long, the number of media may be limited according to the performance of the pump 2. For example, in the general case, when the nutrient solution is corrected once, up to 6 mediums can be selected and set, but when the length of the medium is toxic or the channel through which the nutrient solution can flow is narrow, the number of mediums is 4 to 6 Up to one can be selected and set.

For another example, if the number of mediums for nutrient correction is 13, 5 mediums are allocated to the first correction group, 4 mediums are allocated to the second correction group, and 4 mediums are allocated to the third correction group. Can be assigned. That is, by appropriately dividing the load, the load on the pump 2 can be reduced.

On the other hand, the nutrient solution supply apparatus for a greenhouse according to an embodiment of the present invention may further include a plurality of detection units.

The detector may be disposed while being connected from the culture medium to the drain line 5. On the other hand, the nutrient solution supply device of a greenhouse according to an embodiment of the present invention is provided with a plurality of medium, it may be provided with a detection unit for each medium.

That is, a plurality of detection units may be installed at a rear end of each of the plurality of discharges among lines connected to the drain line 5 at each of the plurality of discharges.

Accordingly, the plurality of detection units may measure turbidity or acidity of the nutrient solution passing through each medium, and the detected turbidity or acidity measurement value may be provided to the controller 7.

The control unit 7 may select a medium requiring nutrient solution correction based on the turbidity or the measured value of the acidity.

Thereby, the nutrient solution supply device of a greenhouse according to an embodiment of the present invention can realize automation by correcting the nutrient solution, and can contribute to lowering worker fatigue by saving labor.

In a more detailed description of the detection unit, since six badges are provided in the first badge group A1, the eleventh to sixteenth detection units S11 to S16 may be provided for each badge. In addition, the second badge group A2 may be provided with twenty-first to twenty-sixth detection units S21, S22, S23, S24, S25, and S26. Likewise, the n1 to n6th detection units Sn1, Sn2, Sn3, Sn4, Sn5, and Sn6 may be provided in the nth medium group An.

Therefore, it is possible to measure the nature of the nutrient solution discharged from a particular medium, such as the turbidity of the nutrient solution or the acidity of the nutrient solution.

When the turbidity of the nutrient solution is clear, it can be estimated that the consumption of nutrient solution is high, and when the turbidity of the nutrient solution is turbid, it can be estimated that the consumption of nutrient solution is sluggish. That is, when the turbidity of the nutrient solution is more turbid than the set value, the corresponding medium may be selected as the calibration medium.

Likewise, the acidity of a nutrient solution can be estimated to grow in a given medium depending on whether it is acidic or basic. When the nutrient solution is sufficiently consumed, the acidity of the nutrient solution can be detected at a value of 5.8PH to 6.2PH. However, when there is any problem with the growth of the crop, the acidity of the nutrient solution may be lower than 5.8PH or higher than 6.2PH, and in this case, the nutrient solution must be properly calibrated, and the corresponding medium can be selected as a calibrated medium.

On the other hand, the apparatus for supplying nutrients for a greenhouse according to an embodiment of the present invention may further include a check valve, as shown in FIG. 3.

The check valve may be installed at a rear end of the detector among lines connected from the detector to the drain line 5. Meanwhile, since a plurality of badges are provided, a check valve may be installed for each line installed in each of the badges.

While the nutrient solution correction is performed, the nutrient solution correction may be performed on one medium and the nutrient solution correction may not be performed on another adjacent medium. At this time, it is possible to prevent the excess nutrient solution discharged from the medium to which the nutrient solution correction is performed from flowing back to another adjacent medium.

That is, the nutrient solution supply device of a greenhouse according to an embodiment of the present invention selectively corrects only the medium to which the nutrient solution is to be corrected, and prevents backflow of the corrected nutrient solution to the medium that does not, thereby improving the reliability of nutrient solution correction. I can make it.

On the other hand, the nutrient solution supply device for a greenhouse according to an embodiment of the present invention may further include a sub tank 1a and a sub pump 2a.

In the sub-tank 1a, a correction nutrient solution set in advance may be prepared and stored according to experience or in advance.

That is, the nutrient solution supplying device of a greenhouse according to an embodiment of the present invention can store two types of nutrient solutions having different nutrient properties, thereby supplying a general nutrient solution, and performing a nutrient solution correction as desired. have.

The sub-pump 2a may be disposed between the sub-tank 1a and the main line 3, thereby forming a pressure to supply the corrected nutrient solution to the medium requiring correction. Therefore, it is possible to reduce the burden on the pump 2 by correcting the nutrient solution using the sub pump 2a.

Hereinafter, an example of performing nutrient solution correction step by step will be described in detail with reference to FIG. 4.

First Step (S1): In a state where the tank 1 is filled with a basic nutrient solution, a general nutrient solution is supplied. In this way, a general nutrient solution is supplied to a plurality of mediums belonging to a specific medium group.

Second step (S2): The turbidity or acidity of the nutrient solution is measured at the end of each medium. The turbidity measurement value or the acidity measurement value is compared with the reference value, and the calibration target medium or the calibration target medium group is set according to the measurement deviation value, and thereby, which medium or which medium group to be corrected for nutrient solution is stored in the control unit 7 do.

Third step (S3): It is checked whether the medium group currently supplying the nutrient solution is the last medium group.

Fourth step (S4): It is determined according to the result of the third step (S3). If you want to continue supplying a general nutrient solution, the next sequential medium group is selected, and the process returns to the first step (S1). Repeat supply of nutrient solution.

The fifth step (S5): By judging according to the result of the third step (S3), when it is no longer necessary to supply a general nutrient solution, it is determined whether there is a medium requiring correction. If the medium that needs correction is not stored in the control unit 7, the supply of the nutrient solution is terminated.

Sixth step (S6): When it is determined in the fifth step (S5) that there is a medium requiring correction, the valve of the medium to be corrected or the valve of the medium group to be corrected is opened, and the valves of the remaining medium are closed. That is, the main valve and the sub-valve of the path connected to the medium are opened for supplying the corrected nutrient solution to the medium requiring correction.

Seventh step (S7): When the corrected nutrient solution is supplied for a set time and the nutrient solution correction is completed in the corresponding medium, the process returns to the fifth step (S5) to determine that there is more medium that needs to be corrected, and the medium to be corrected still exists. In the case where the correction of the nutrient solution is repeatedly carried out, and the nutrient solution correction is no longer necessary, the supply of the corrected nutrient solution is terminated.

As described above, the nutrient solution supplying device of a greenhouse according to an embodiment of the present invention can perform nutrient solution correction by selectively selecting a medium with poor growth even if the same type of crop is grown in a greenhouse in the same space. The crop quality can be uniform.

In addition, the nutrient solution supplying device of a greenhouse according to an embodiment of the present invention can supply nutrient solution in general, and supply a corrected nutrient solution by selecting a specific medium according to the wish of a manager.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be.

Therefore, the embodiments described above should be understood as illustrative and non-limiting in all respects, and the scope of the present invention is indicated by the claims to be described later, and derived from the meaning and scope of the claims and the concept of equivalents thereof. All changes or modifications should be construed as being included in the scope of the present invention.

1: tank 1a: sub tank
2: pump 2b: sub pump
3: main line
41, 42… … 4n: sub line
5: drain line
61 to 66: check valve
7: control unit
A1, A2,… … An: 1st, 2nd, nth badge group
A11, A12, A13, A14, A15, A16: medium 11 to 16
A21, A22, A23, A24, A25, A26: medium 21 to 26
An1, An2, An3, An4, An5, An6: n1-n6th medium
V1, V2,… … Vn: first, second, nth main valve
V11, V12, V13, V14, V15, V16: 11th to 16th sub-valve
V21, V22, V23, V24, V25, V26: 21st to 26th sub-valve
Vn1, Vn2, Vn3, Vn4, Vn5, Vn6: n1-n6th sub-valve
S11, S12, S13, S14, S15, S16: 11th to 16th detection units
S21, S22, S23, S24, S25, S26: 21st to 26th detection units
Sn1, Sn2, Sn3, Sn4, Sn5, Sn6: n1-n6th detection unit

Claims (6)

A plurality of media disposed inside the greenhouse and on which crops are grown;
A plurality of badge groups (A1, A2, …… An) in which 2 or more and 6 or less are selected from among the plurality of media to form a group:
A tank 1 filled with a nutrient solution or a correction nutrient solution;
A pump (2) for generating pressure to move the nutrient solution in the tank (1) to a selected medium from among the plurality of mediums;
A main line (3) installed so that the nutrient solution moves from the tank (1) to the plurality of medium groups (A1, A2, ... An);
Sub-lines (41, 42… 4n) branched from and connected to the main line 3 and buried in each medium within the medium group so that the nutrient solution is supplied to each medium;
A drain line 5 for recovering an excess nutrient solution that has not been consumed from each medium;
A plurality of main valves arranged between the main line 3 and each of the plurality of discharge groups (A1, A2, …… An) to control the flow of nutrients to a specific discharge group (A1, A2, …… An) (V1, V2,… Vn);
A plurality of sub valves arranged in lines respectively connected to the plurality of mediums at each of the plurality of main valves V1, V2,… Vn to control the flow of nutrient solution to a specific medium; And
When all the sub-valves are open, the main valve selected from among the plurality of main valves V1, V2,… Vn is opened for a set time and the remaining main valves are closed, and the selected main valve is a plurality of main valves ( Includes; a control unit 7 for controlling to be sequentially selected from among V1, V2,… Vn),
When there is a medium requiring nutrient solution correction, the control unit 7 selects a specific medium from among a plurality of mediums regardless of the plurality of medium groups, and the main valve and the sub valve of the nutrient solution movement path connected to the selected medium are Controlling to be open and the rest closed
A nutrient solution supply device of a greenhouse comprising a.
The method of claim 1,
The control unit 7
If the number of media for correcting the nutrient solution was more than the set number,
Set multiple correction groups with the number of badges less than the set number,
Controlling such that the main valve and sub valve of the nutrient solution movement path for performing nutrient solution correction among the plurality of correction groups are opened, and the remaining main valve and sub valve are closed.
A nutrient solution supply device of a greenhouse comprising a.
The method of claim 2,
The set number is determined according to the specifications of the pump
A nutrient solution supply device of a greenhouse comprising a.
The method of claim 1,
A plurality of detection units installed at the rear end of each of the plurality of media among the lines connected to the drain line 5 from each of the plurality of media to measure turbidity of the nutrient solution or the acidity of the nutrient solution via the media;
To select a medium requiring nutrient solution correction based on the turbidity or the measured value of the acidity
A nutrient solution supply device of a greenhouse comprising a.
The method of claim 4,
A plurality of check valves installed at a rear end of each of the plurality of detection units among lines connected from the plurality of detection units to the drain line (5) to prevent the nutrient solution from flowing back to another adjacent medium;
A nutrient solution supply device of a greenhouse comprising a.
The method of claim 1,
A sub tank (1a) to contain the corrected nutrient solution; And
A sub pump (2a) disposed between the sub tank (1a) and the main line (3) to form pressure to supply the corrected nutrient solution to the medium requiring correction;
A nutrient solution supply device of a greenhouse further comprising a.

Images