KR200236771Y1 - Automatic fertilizer mixing system having a inflowing air excluding device - Google Patents

Abstract

The present invention relates to a nutrient solution automatic supply device equipped with an air inlet blocking means, when the conventional nutrient solution supply device is depleted in the liquid fertilization tank during operation, the external air flows into the liquid fermentation pipe and the supply of nutrient solution becomes poor. The pump was damaged, and there was a problem in that the installation cost increased because a separate liquid fertilizer pump for pumping the liquid fertilizer was installed.

The present invention is a liquid fertilization flow path according to the control of the air inlet blocking means and the controller provided with a buoyancy port on the inside to block the inflow of external air by closing the liquid fertilizer discharge port while floating or sinking according to the level of liquid fertilizer supplied from the liquid fertilizer tank And nutrient solution automatic supplying device equipped with an air inflow shut-off means which is additionally provided with a valve means for intermitting the opening and closing of the air flow path to control the liquid supply and the negative pressure generated in the pipeline. In addition, it prevents the inflow of external air generated by the air supply, and even if the air is depleted and the external air is inflowed, the nutrient solution can be supplied immediately by replenishing the liquid in the liquid tank without taking any additional measures. To prevent damage to the pump.

Description

AUTOMATIC FERTILIZER MIXING SYSTEM HAVING A INFLOWING AIR EXCLUDING DEVICE}

The present invention relates to a nutrient solution automatic supply device that can automatically supply water or chemical fertilizer mixed with water to plants such as fruits, vegetables, flowers, etc. More specifically, the liquid contained in the liquid fertilizer tank during the nutrient supply is depleted In this case, the present invention relates to a nutrient solution automatic supply device equipped with an air inflow blocking means to prevent a poor supply of nutrient solution caused by the inflow of external air into the pipeline through a supply pipe supplied with a liquid ratio, and to prevent burnout of the pump. .

In general, when cultivating a variety of plants such as horticulture, open field crops, landscaping plants, artificially mixed with water alone or water and chemical fertilizers at an appropriate ratio, such as a fixed time interval, insolation, media moisture, etc. The nutrient solution automatic feeding device which supplies a plant automatically by a fixed amount according to conditions is used.

FIG. 1A is a configuration diagram showing a conventional nutrient solution supplying device employing a magnet pump and an anisotropic valve. As shown in the drawing, a raw water tank 10 containing raw water and a raw water tank 10 accommodated in the raw water tank 10 are illustrated in FIG. The main pump 60 for supplying a mixture of liquid and raw water (liquid) through the liquid fertilization and nutrient supply pipe 15 by pumping the raw water, and the nutrient solution supplied through the nutrient solution supply pipe 65 by the main pump 60 And the filter 70 for filtering the sequential installation and pumping the liquid contained in the liquid fermentation tank 30, the magnet pump 34 for supplying the liquid fertilization mixing and nutrient solution supply pipe 15 through the liquid fermentation pipe 31, and On the liquid fertilization pipe 31 between the magnet pump 34 and the liquid fertilization mixing and nutrient solution supply pipe 15 so as to control the liquid ratio supplied by the magnet pump 34 at regular intervals according to the control of the controller. Installed anisotropy It consists of a bracket (36).

However, in the conventional nutrient solution supplying apparatus as described above, when the liquid ratio in the liquid fermentation tank 30 is depleted during operation, external air flows into the liquid fermentation pipe 31 to supply the nutrient solution poorly, and the magnet pump 34 is damaged. The main pump 60 and the magnet pump 34 are continuously operated during the operation of the nutrient solution supplying device. When the anisotropic valve 36 is closed by the controller, the main pump 60 and the magnet pump 34 are operated. When a high pressure due to the operation of the magnet pump 34 is applied to the anisotropic valve 36, there is a problem that the intermittent state is very unstable such as a vibration phenomenon occurs in the anisotropic valve 36 due to the high pressure.

In addition, there is a problem in that the installation cost is expensive because a separate magnet pump 34 for pumping the liquid ratio in the liquid tank 30 is installed.

Another example of the nutrient solution automatic supplying device that is generally used in connection with the problems caused by the conventional anisotropic valve is described with reference to the drawing shown in FIG.

Figure 1b is a configuration diagram showing another example of a conventional nutrient solution automatic supply device employing a magnet pump and a three-way valve, the raw water tank 10 and the main pump in the same manner as the nutrient solution automatic supply device of the anisotropic valve type described in Figure 1a (60), the filter 70 is connected to the liquid fertilization mixing and nutrient solution supply pipe 15 and the nutrient solution supply pipe 65 in sequence and the liquid fertilizer mixing and supplying the liquid ratio supplied from the liquid fertilization tank 30 through the liquid fertilizer pipe 31 A magnet pump 34 for supplying to the nutrient supply pipe 15 is installed, and a liquid pump passage 31 between the magnet pump 34 and the liquid fertilization mixing and nutrient solution supply pipe 15 in which the conventional anisotropic valve 36 is installed is provided. The three-way valve 38 is installed in one side, the one side of the three-way valve 38 is connected to the bypass pipe passage 35 is in communication with the liquid fertilizer pipe 31 is installed between the liquid tank 30 and the main pump 34. It is installed.

Thus, when the three-way valve 38 for controlling liquid mixing and the liquid supply supply from the magnet pump 34 to the nutrient supply pipe 15 is closed under the control of the controller, the liquid ratio is bypassed through the bypass pipe 35. By continually circulating, it is possible to solve the instability of the valve intermittent state, which has been a problem in the conventional two-way valve type nutrient solution automatic supply device.

However, the three-way valve type nutrient solution supplying device also has a problem in that the equipment cost is high and the liquid air in the liquid feeding tank 30 is exhausted as in the liquid supplying device of the two-way valve 36 type. Poor nutrient solution caused by the inflow and the pump burnout problem still does not solve the problem.

The domestic patent application No. 99-322 'nutrient solution supply device' filed by the applicant to solve the problem of the increase of equipment cost and the burnout of the pump will be described with reference to Figure 2a, 2b The apparatus is connected to the raw water tank (10) for receiving raw water, the liquid mixture of the raw water tank (10) and the raw water supply pipe (15) to perform a pumping action, and the liquid fertilization tank (30) The liquid ratio is mixed between the raw water tank 10 and the main pump 60 by the suction force according to the operation of the main pump 60 while maintaining a constant liquid level of the liquid ratio from The liquid-liquid level maintenance device 80 supplied to (15), and the filter 70 which filters the nutrient solution which is a mixed liquid of the raw water and liquid ratio supplied by the said main pump 60 are comprised.

Thus, while maintaining the level of the liquid to be supplied through the liquid inlet pipe 81 from the liquid fertilizer tank 30 by the liquid fertilizer level holding device 80, and also the liquid fertilization by a predetermined amount through the liquid fertilizer discharge pipe 82 And to supply to the raw water supply pipe 15, and when the liquid is exhausted by closing the liquid rain outlet 83 by the ball valve 87 to solve the problem of the increase in equipment cost and the problem of burnout of the pump according to the installation of a separate liquid fertilizer pump I did it.

However, the nutrient solution automatic supply device did not completely solve the problem of inflow of external air generated when the liquid ratio in the liquid fertilization tank 30 was exhausted while supplying the nutrient solution.

The present invention has been made to solve the above-mentioned problems of the prior art, the air inlet blocking means for blocking the inflow of external air when the liquid in the liquid fertilization tank is exhausted during the nutrient solution is generated in the cracking and pipeline A valve means for releasing the negative pressure prevents the inflow of external air generated during liquid exhaustion, and it is possible to continue to supply the necessary water to the plant even if the external air flows in the liquid tank without taking any action. It is an object of the present invention to provide a nutrient solution automatic supply device equipped with an air inflow blocking means to immediately perform a normal nutrient supply operation by replenishing the liquid ratio.

Figure 1a is a block diagram showing a conventional nutrient solution automatic supply device employing a magnet pump and an anisotropic valve,

Figure 1b is a block diagram showing a conventional nutrient solution automatic supply device employing a magnet pump and a three-way valve,

Figure 2a is a configuration diagram showing another example of a conventional nutrient solution supply device,

Figure 2b is an enlarged perspective view of the liquid level maintenance device of Figure 2a,

3 is a block diagram showing an embodiment of the present invention,

4 is a schematic view showing an operating state according to an embodiment of the present invention,

5 is a schematic view showing an operating state of another embodiment according to the present invention,

6a, 6b is a schematic view of another embodiment according to the present invention,

7A and 7B are schematic views of yet another embodiment according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: raw water tank, 15: liquid mixing and nutrient supply pipe,

30: liquid tank, 31a: the first liquid pipe,

31b: second liquid duct; 31c: third liquid duct;

31d: air line, 40: air inlet blocking means,

45: buoyancy ball, 50: valve means,

51: a first input unit, 52: a second input unit,

54: liquid rain flow path, 56: air flow path,

59: output part, 60: main pump.

The present invention is a raw water tank for receiving raw water, the main pump for the pumping action is connected to the liquid mixture and feed water supply of the raw water tank, the filter connected to the main pump by the nutrient solution supply pipe to filter the nutrient solution supplied by the main pump Sequentially connected and installed, and one side of the liquid fertilizer mixing and raw water supply pipe is connected to the liquid fertilization pipe is connected to the liquid fertilizer in the liquid fertilization tank under the control of the controller is supplied to the liquid fertilization mixing and raw water supply pipe by a predetermined amount In the liquid fertilizer tank, the other end of the first liquid fertilization pipe is connected to the upper liquid fertilizer inlet by a certain height, the other end of the first liquid fertilization pipe is connected to one end of the bottom of the liquid fertilizer tank and float or go in accordance with the liquid level supplied from the liquid fertilizer tank A buoyancy ball is installed to control the opening and closing of the liquid rain discharge outlet formed at the bottom while sitting The air inlet blocking means of the hollow-cylindrical cylinder shape and the first input part are connected to the second liquid conduit connected to the liquid inlet outlet of the air inlet blocking means, and the air input connected to the first liquid conduit is connected to the second input part. A third liquid fermentation channel connected to the liquid fertilization mixture and the raw water supply pipe is connected to the liquid fertilization passage connected to the output unit from the first input unit to the output unit under the control of the controller, and the air passage communicating from the second input unit to the output unit for a predetermined time. It is characterized in that the valve means is further provided to alternately open at intervals.

Hereinafter, with reference to the accompanying drawings for the configuration and effect of the preferred embodiment of the present invention will be described in more detail.

3 is a schematic view showing an embodiment of the present invention, Figure 4 is a schematic diagram showing an operating state according to an embodiment of the present invention, as shown in Figure 3, 4, the present invention is a certain amount of raw water A raw water tank (10) for receiving and storing the main pump 60 and the main pump 60 connected to the liquid mixing and the raw water supply pipe 15 of the raw water tank 10 to perform a pumping action, and to the main pump 60 A filter 70 connected to the nutrient solution supply pipe 65 to filter the nutrient solution supplied by the main pump 60 is sequentially installed.

The raw water tank 10 is provided with an automatic water supply pump (not shown) equipped with a normal water level sensor so that a certain amount of raw water is filled to maintain a constant water level even when the raw water is discharged to the outside.

The bottom surface of the raw water tank 10 is connected to the liquid mixture and the raw water supply pipe 15 of the pipe shape having a predetermined diameter is connected to the main pump 60 and the nutrient solution supply pipe between the main pump 60 and the filter 70 65 are connected and installed.

That is, the raw water contained in the raw water tank 10 is supplied along with the liquid ratio mixing and raw water supply pipe 15 by the pumping operation of the main pump 60 and passed through the filter 70 connected to the nutrient solution supply pipe 65. Impurities are filtered out and supplied to plants.

The liquid mixture and the raw water supply pipe 15 between the raw water tank 10 and the main pump 60 receives the liquid ratio from the liquid fertilization tank 30 in which the liquid ratio is accommodated, while maintaining a constant liquid level and supplying the liquid ratio to the lower side thereof. Air inlet blocking means 40 to prevent the inflow of external air when the liquid ratio is exhausted in the liquid tank 30 and the valve means (50) to control the supply or blocking of the liquid to be supplied from the air inlet blocking means (40) This connection is installed.

The liquid tank 30, the air inlet blocking means 40 and the valve means 50 is not limited to the quantity shown can be installed by increasing or decreasing the amount of liquid to be supplied.

On the bottom of the liquid tank 30, the upper end of the first liquid conduit pipe 31a is installed and the first liquid conduit pipe 31a extends to the lower side, the lower end of the liquid inlet formed on the upper end of the air inlet blocking means 40. It is connected to the inlet (41).

The air inlet blocking means 40 is formed in a hollow cylindrical shape to accommodate a certain amount of liquid rain supplied from the liquid fertilizing tank 30 and therein is formed on the bottom surface while floating or sinking according to the level of liquid rain A spherical buoyancy ball 45 for regulating the opening and closing of the liquid rain outlet 49 is provided.

A second liquid nasal conduit 31b is connected to the liquid nasal discharge outlet 49 of the air inlet blocking means 40, and the second liquid nasal passage 31b is extended downward by a predetermined height to the lower side so that the first of the valve means 50 is closed. It is connected to the input unit 51 is installed.

The valve means 50 shown in the drawing as an embodiment of the present invention is a conventional three-way valve having two inlets and one outlet, one side of the first input portion connected to the second liquid nasal conduit 31b (51) is formed and the other side is connected to the liquid fertilization channel 54, the output portion 59 is connected to the liquid-liquid mixing and the third liquid fermentation pipe (31c) connected to the raw water supply pipe (15) side is formed on one side of the air pipe passage A second input unit 52 connected to 31d is formed.

One end of the air line 31d is connected to the second input unit 52 and the other end thereof is connected to the first liquid nasal passage 31a.

Thus, the actuator 55 provided inside the valve means 50 is moved back and forth by a solenoid (not shown) to open the liquid rain passage 54 and the air passage 56 alternately.

That is, when the actuator 55 moves forward to bring the packing member 53 into close contact with the packing member 53, the packing member 53 closes the opening of the liquid fertilization channel 54, and at the same time, the air channel 56 is opened and the actuator is opened. When the 55 is moved to the rear, the packing member 53 is spaced apart so that the liquid rain passage 54 is opened and at the same time the air passage 56 is closed.

The opening and closing control of the valve means 50 by the actuator 55 is controlled by a controller (not shown) at regular intervals. For example, the liquid rain passage 54 is performed for 2.5 seconds with one cycle of 5 seconds. For the remaining 2.5 seconds, the liquid fertilization channel 54 is closed and the air channel 56 is opened at the same time.

The valve means 50 is operated in conjunction with the operation of the main pump 60 and the opening and closing cycle of the valve means 50 can be changed by the control of the controller according to the type of plant, the type of liquid fertilizer and the growth environment of the plant, etc. Do.

It will be described the operation and effect of the nutrient solution automatic supply device equipped with the present invention air inlet blocking means composed of such a configuration.

When a sufficient amount of liquid ratio is stored in the liquid fertilizing tank 30, first, when the automatic nutrient solution is operated, the raw water supplied and received in the raw water tank 10 is mixed with the liquid by the operation of the main pump 60 and the raw water supply pipe 15 Inhalation).

The liquid ratio (solid arrow mark) accommodated in the liquid tank 30 is stored in the air inlet blocking means 40 along the first liquid path (31a) and the buoyancy ball 45 is raised when the liquid level is higher than a certain level. The liquid fertilizer outlet 49 is opened and is supplied to the second liquid fertilizer conduit 31b through the liquid fertilizer outlet 49 opened.

When the actuator 55 inside the valve means 50 is moved backward by the control of a controller (not shown) and the packing member 53 is spaced apart, the liquid non-flow passage 54 is opened for a predetermined time (2.5 seconds). The liquid fertilizer supplied through the liquid fertilizer conduit 31b is discharged to the third liquid fertilizer conduit 31c through the output unit 59 via the first input unit 51 and the liquid fertilization passage 54, and then the liquid fertilizer mixing and raw water supply pipe Supplied to (15).

After 2.5 seconds, when the actuator 55 moves forward by the control of the controller to open the second input unit 52 on the rear side and closes the liquid fertilization channel 54, the supply of liquid fertilizer is temporarily stopped. After 2.5 seconds, the liquid fertilization passage 54 is opened again to continuously supply the nutrient solution to the plant while repeating the circulation in which the supply of the liquid fertilization continues.

When the nutrient solution is exhausted in the liquid fertilizing tank 30 while the nutrient solution is automatically supplied in this way, the liquid fertilization in the air inlet blocking means 40 is sucked and reduced while the buoyancy ball 45 descends to lower the liquid fertilizer outlet 49. By closing it blocks the ingress of air.

At this time, a negative pressure is generated inside the second liquid nasal passage 31b.

After a certain period of time (2.5 seconds), the actuator 55 of the valve means 50 moves forward to close the liquid fertilization channel 54 and at the same time, when the air channel 56 is opened, the first liquid ratio through the air pipe 31d. The air (dotted arrow mark) in the conduit 31a flows in, and this air flows into the second liquid nasal conduit 31b to eliminate the negative pressure.

When the actuator 55 of the valve means 50 moves forward again after a predetermined time (2.5 seconds) has elapsed, the liquid non-flow passage 54 is opened and the buoyancy ball 45, which has weakened the adhesion, is in close contact with each other and the inflow of external air To block.

In addition, the negative pressure is generated again in the second liquid nasal passage 31b and then released.

When the liquid is filled in the liquid fertilizing tank 30 at any time while repeatedly performing such an operation, the liquid buoyant flows into the air inlet blocking device 40 through the first liquid fertilizing pipe 31a and when the buoyancy ball is above a certain level When the negative pressure applied to the (45) is released, the buoyancy ball 45 is injured while the liquid rain flows into the second liquid fertility passage (31b) through the liquid rain outlet 49 and opening and closing of the valve means 50 under the control of the controller The liquid ratio is normally supplied to the liquid fertilization mixture and the nutrient solution supply pipe 15 according to the control.

Thus, even if the liquid ratio is exhausted in the liquid drainage tank 30, the effect of preventing the inflow of external air is obtained. When the liquid ratio is filled in the liquid fermentation tank at any time, the normal liquid supply is possible without any action.

5 is a schematic view showing an operating state of another embodiment according to the present invention, as shown in the drawing, between the second liquid nasal conduit 31b and the first liquid nasal conduit 31a by a controller for a predetermined time (2.5) When the power is applied in cycles of a second), a first anisotropic valve 91 is installed to open the liquid fertilization channel 94 inside and close the liquid fertilization channel 94 when the power is turned off. An air line 31d is connected and installed between the pipe line 31a and the second liquid rain pipe line 31b, and when the power is applied by the controller on the air line 31d, the air line 96 inside thereof is closed. When the power is turned off and the power supply is turned off, the second anisotropic valve 92 is opened to open the air line 31d.

When a sufficient amount of liquid ratio is stored in the liquid fertilizing tank 30, first, when the automatic nutrient solution is operated, the raw water supplied and received in the raw water tank 10 is mixed with the liquid by the operation of the main pump 60 and the raw water supply pipe 15 At the same time as the suction along the liquid liquid tank (solid arrow mark) accommodated in the liquid fertilization tank 30 is introduced into the air inlet blocking means 40 along the first liquid fertilization pipe (31a) and the buoyancy ball when the liquid level of the liquid fertilizer more than a certain height 45 rises to open the liquid fertilizer outlet 49 and is supplied to the second liquid fertility passage 31b through the opened liquid fertilizer outlet 49.

Under the control of the controller (not shown), the actuator 95 inside the first anisotropic valve 91 moves backward to open the liquid rain passage 94 for a predetermined time (2.5 seconds), and at the same time, the second anisotropic valve 92 When the actuator 95 moves forward and the air passage 96 is closed, the liquid ratio supplied through the second liquid nasal passage 31b is discharged to the third liquid nasal passage 31c via the liquid nasal passage 94 and then It is supplied to the liquid mixture and the raw water supply pipe (15).

After 2.5 seconds, when the liquid rain flow path 94 of the first anisotropic valve 91 is closed and the air flow path of the second anisotropic valve 92 is opened under the control of the controller, the supply of liquid rain is temporarily stopped. After 2.5 seconds, the liquid fertilization passage 94 is opened again to continuously supply the nutrient solution to the plant while repeating the circulation in which the supply of the liquid fertilization continues.

When the nutrient solution is exhausted in the liquid fertilizing tank 30 while the nutrient solution is automatically supplied in this way, the liquid fertilization in the air inlet blocking means 40 is sucked and reduced while the buoyancy ball 45 descends to lower the liquid fertilizer outlet 49. By closing it blocks the ingress of air.

At this time, a negative pressure is generated inside the second liquid nasal passage 31b.

After the predetermined time (2.5 seconds) has elapsed, the actuator 95 inside the first anisotropic valve 91 moves forward to close the liquid rain passage 94 for a predetermined time (2.5 seconds), and at the same time, the second anisotropic valve 92 When the actuator 95 moves backward and the air passage 96 is opened, the air (dotted arrow mark) in the first liquid nasal passage 31a flows through the air passage 31d and the air flows into the second liquid nasal passage 31b. Flows to the negative pressure.

After a certain period of time (2.5 seconds) again, when the liquid rain passage 94 of the first anisotropic valve 91 is opened and the second anisotropic valve 92 is closed, the buoyancy ball 45 which has weakened the adhesion is closely adhered to. To block the inflow of external air.

In addition, negative pressure is generated again in the second liquid nasal passage 31b.

When the liquid is filled in the liquid fertilizing tank 30 at any time while repeatedly performing such an operation, the liquid buoyant flows into the air inlet blocking device 40 through the first liquid fertilizing pipe 31a and when the buoyancy ball is above a certain level When the negative pressure applied to the (45) is released, the buoyancy ball (45) is injured while the liquid rain flows into the second liquid nasal conduit (31b) through the liquid rain outlet (49) and the first anisotropic valve 91 under the control of the controller In accordance with the opening and closing of the liquid mixture and the nutrient solution supply pipe 15 to supply the liquid ratio normally.

Thus, another embodiment of the present invention made by installing two anisotropic valves also obtains the effect of preventing the inflow of external air even if the liquid ratio is exhausted in the liquid tank 30 as in the above-described embodiment of the present invention.

6A and 6B are schematic views of still another embodiment according to the present invention. As shown in the drawing, one end is connected to one side of the valve means 50 or the anisotropic valve 92, and the other end is connected to the first liquid nasal passage. One end portion of the air line 31d connected to the 31a side is opened to be extended upward to a position higher than the liquid fertilizer tank 30.

That is, as described above with reference to FIGS. 4 and 5, the liquid pressure is depleted without the negative pressure generated in the second liquid nasal conduit 31b at the time of liquid depletion by eliminating the suction of air inside the first liquid nasal passage 31a. The external air is directly sucked through the opening formed in the upper end portion of the air line 31d extending upward from the tank 30 so that the negative pressure in the second liquid nasal passage 31b can be released.

Thus, the number of parts can be reduced by omitting the installation of one end of the air pipe line 31d on one side of the first liquid pipe line 31a, and the connection portion between the air pipe line 31d and the second liquid pipe line 31b. It is possible to prevent the liquid leakage problem that can occur in the above, and to improve the productivity by reducing the labor required for the production of nutrient solution automatic supply device.

Figure 7a, 7b is a schematic view of another embodiment according to the present invention, as shown in the figure, one end is opened by the operator directly operated on the air line (31d) is extended upward by a certain height to the air line The manual valve 99 is installed to control the air flowing in through the 31d.

In FIG. 7A, one end is connected to the valve means 50, and the other end is provided by installing a manual valve 99 on one side on an air line 31d extending upward.

In FIG. 7B, one end is connected to the second liquid nasal passage 31b and the other end is provided with a manual valve 99 on the air passage 31d extending upward.

Looking at the operation relationship when the manual valve 99 is operating when the device is closed, the liquid ratio in the liquid fertilization tank 30 is normally supplied to the liquid mixture and the nutrient solution supply pipe 15 through the first anisotropic valve 91.

If the liquid fertilizer is exhausted, the liquid fertilizer outlet 49 is blocked by the buoyancy ball 45 in the air inlet blocking means 40, so that a negative pressure is generated in the second liquid fertilization pipe 31b. After the liquid ratio is replenished in the 30 and the manual valve 99 is directly opened to release the negative pressure in the second liquid ratio pipe 31b, the operator closes the manual valve 99.

Thus, buoyancy buoyancy ball 45 is weakened to the upper side, and the liquid ratio is supplied to the lower side and the liquid ratio is normally supplied.

As described above, the present invention includes an air inlet blocking means and a valve means to prevent the inflow of external air caused by the exhaustion of the liquid in the liquid fertilization tank, and even if the liquid air is depleted and the external air is introduced, the plant is basically required. Water can continue to be supplied, and after recognizing the exhaustion of liquid fertilizer, the liquid can be replenished in the liquid fertilization tank without any further action so that the nutrient solution can be performed immediately. It has one effect.

Claims (4)

The nutrient solution supply pipe (65) to the main pump (60) and the main pump (60) to be connected to the raw water tank (10) for receiving the raw water and the liquid mixture of the raw water tank (10) and the raw water supply pipe (15) to perform a pumping action. (70) is connected to the filter 70 for filtering the nutrient solution supplied by the main pump (60) sequentially and the liquid fertilizer mixing and the liquid supply pipe (31) is connected to one side of the raw water supply pipe (15) In the nutrient solution automatic supply device for supplying the nutrient solution contained in the liquid fertilization tank 30 to the liquid fertilizer mixing and feed water supply pipe 15 by a predetermined amount under the control of the controller to automatically supply the mixed nutrient solution to the plant at an appropriate ratio, The other end of the first liquid fertilization pipe 31a, which is connected to the bottom of the liquid fertilizing tank 30, is extended downward by a predetermined height to be connected to the liquid ferment inlet 41 on the upper side thereof, and is supplied from the liquid fermenting tank 30 to the inside thereof. A hollow-cylindrical cylinder-shaped air inlet blocking means (40) provided with a buoyancy ball (45) for intermittent opening and closing of the liquid fertilizer outlet (49) formed on its bottom while floating or sinking according to the level of liquid fertilizer to be made; The other end of the second liquid conduit 31b connected to one end of the liquid inlet outlet 49 of the air inlet blocking means 40 is connected to the first input part 51, and the first liquid conduit line is connected to the second input part 52. The other end of the air line 31d having one end connected to 31a is connected to the output part 59, and the third liquid nasal conduit 31c connected to the liquid mixing and supplying water supply pipe 15 is connected to the output unit 59. By the control, the liquid rain passage 54 communicating with the output unit 59 from the first input unit 51 and the air passage 56 communicating with the output unit 59 from the second input unit 52 are periodically opened. And a valve means (50) provided to close the nutrient solution automatic supply device provided with an air inflow blocking means. According to claim 1, wherein when the power is applied between the second liquid nasal conduit 31b and the first liquid nasal conduit 31c by the controller at regular intervals, the liquid rain passage 94 of the inner side is opened and the power is supplied. When this is off, a first anisotropic valve 91 for closing the liquid rain passage 94 is installed, and an air pipe 31d is connected between the first liquid rain passage 31a and the second liquid rain passage 31b. In addition, the second anisotropic valve is installed on the air pipe (31d) when the power is applied by the controller to close the air flow path (96) of the inside and open the air pipe (31d) when the power is off ( The nutrient solution automatic supply device having an air inlet blocking means characterized in that the 92) is installed. According to claim 1 or 2, wherein the one end portion of the air pipe line (31d) connected to the first liquid-liquid pipe (31a) side is extended to at least a position higher than the liquid-liquid tank (30) in an open state. The nutrient solution automatic supply device having an air inlet blocking means characterized in that. 4. The air inlet blocking means according to claim 3, wherein a manual valve (99) is provided on the air line (31d) to intermittently control the air flowing through the air line (31d) by an operator's operation. Equipped with automatic nutrient solution.