JP2505951Y2 - Circulation-type automatic fertilizer applicator for hydroponics without a nutrient solution tank - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention is, in a hydroponic cultivation apparatus, automatically supplies or returns nutrient solution to a number of beds without providing a large nutrient solution tank (liquid fertilizer tank, nutrient solution tank). The present invention relates to a circulation type automatic fertilizer applicator for hydroponic cultivation that does not include a nutrient solution tank that constantly circulates the nutrient solution.

[0002]

2. Description of the Related Art Conventionally, various inventions and devices have been proposed as an automatic fertilizer application apparatus for supplying a nutrient solution or circulating and utilizing a returned nutrient solution in a hydroponic cultivation apparatus. Among them, the following inventions are given as examples of prior art related to the present invention. First, (1) there is a liquid supply method in hydroponic culture disclosed in Japanese Patent Laid-Open No. 64-13922, which uses a liquid level adjuster to automatically control a pump and liquid supply. (2) There is a hydroponic cultivation apparatus disclosed in Japanese Patent Laid-Open No. 3-297337, which has a configuration in which a fertilizer pump and a motor are automatically controlled according to the situation of the nutrient solution concentration. In addition, (3) JP-A-3-18
No. 3422 nutrient solution control device and JP-A-3-292823
There is a method for hydroponics, and these inventions have a configuration in which a pH meter is used to automatically control pump and fertilizer supply.

[0003]

Each of the inventions outlined above has a structure in which a large-capacity nutrient solution tank is attached, and the nutrient solution is circulated and used for a number of beds via the large-capacity nutrient solution tank. Has become. Therefore, the size of the apparatus is increased and the equipment is complicated, which is an obstacle to the spread of the hydroponic cultivation apparatus. On the other hand, in a so-called large-capacity hydroponics method in which the nutrient solution is circulated in a natural control system from a nutrient solution tank to a large number of beds, this large-capacity nutrient solution causes changes in the nutrient solution (e.g. It is said that the maximum is 5 to 6 tons.)
Therefore, the decrease in nutrient solution has various adverse effects on cultivated crops.

[0004]

In view of the above, the present invention provides:
As a configuration for simultaneously sucking and mixing water and fertilizers (sulfuric acid, trace elements, etc. for pH adjustment) by the suction action of the pump , a nutrient solution tank is omitted (however, a small fertilizer tank is provided. ), And directly mixing in the pipe to generate a nutrient solution of a predetermined concentration, and to greatly reduce the size and simplification of the hydroponic cultivation device, to facilitate the management of the hydroponic cultivation device, The following configuration was adopted for the purpose of facilitating management of the cultivation device.

That is, the circulation system without the nutrient solution of the present invention
The automatic fertilizer applicator for hydroponic cultivation is a large number of beds for hydroponic cultivation and liquid supply pipes for liquid supply connected to the large number of beds.
And one end is connected to the plurality of beds and the liquid supply
A return liquid pipe for a return nutrient solution, the other end of which is connected to the pipe,
Multiple connection arrangements with solenoid valves connected to the liquid supply lines
Pipe, tap water hose and each fertilizer feeding hose connected to the connection pipe, and the liquid level gauge provided in the liquid supply pipe
And automatic switching valve that operate via the control device
And, in an automatic fertilizer system for composed hydroponic cultivation, before
The pump installed in the liquid supply pipe is installed in the liquid supply pipe.
Contact provided the pressure side than the plurality of connection pipes which are
Using the pump,
Characterized by sucking in fertilizer and mixing it in the liquid supply pipe
It is a composition.

[0006]

Next, the operation of the present invention will be described.

The liquid supply pipe of the present invention is provided with a first connecting pipe to which a tap water hose having an electromagnetic valve having a different inner diameter is connected, and a second connecting pipe to which a fertilizer hose such as lime nitrate is connected. , Third nitric acid, magnesia sulphate, first neighbor and third connection pipes to which fertilizer hoses such as sulfuric acid and trace elements are connected. The electromagnetic valve is connected to a liquid level gauge, and a timer is connected to the liquid level gauge. Then, each time the pump is operated by the timer, a current flows through the liquid level gauge, and the liquid level gauge provided in each of the beds detects the nutrient solution level in the bed, and the detected value is the set value. In the following cases, the electromagnetic valve is opened via the controller and other control devices such as equipment , and the pump is turned on.
It operates, for example, water from the first connecting pipe and glass from the second connecting pipe.
Acid lime, nitric acid addition, sulfuric acid, etc. from the third connecting pipe respectively
Inhaled into liquid piping. In this way, suck the liquid supply pipe.
The water, lime nitrate, nitric acid added, etc. that has been put in is in the liquid supply pipe.
And is mixed using the suction force of the pump, and
In the process of transferring the liquid supply pipe of above, thoroughly mix in the pipe.
This mixed nutrient solution is supplied to any of the beds via a strainer, a pump, and an automatic switching valve. When the nutrient solution is supplied through the above-mentioned operation and the nutrient solution surface of the bed reaches the set value, the switch and the control device are stopped and the electromagnetic valve is closed. The supply of the nutrient solution as described above is individually performed in each bed.

When the electromagnetic valve is closed, the nutrient solution is returned to the liquid supply pipe via the return liquid pipe, circulated to the bed via the strainer and pump, and the automatic switching valve, and the nutrient solution is supplied. Flow is always applied to the liquid. If the strainer is not used, it should be routed through the bypass piping.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 is a bed for cultivation, which is provided in several rows in one building. In the figure, 4 is a cultivated crop, 5 is a liquid level, and 6 is a liquid level gauge for detecting the upper and lower sides of the liquid level 5. still,
A large number of supply holes 2a are provided at appropriate intervals in the portion of the liquid supply pipe 2 laid on the bed 1.
As shown in FIG. 3, a and 2b have a supply hole 2b of 5 m at the end thereof.
m, and the other supply holes 2a are 3 mm. The liquid supply pipe 2
Is a first connecting pipe 8 having an inner diameter of 25.4 mm, which is equipped with a first electromagnetic valve that operates with the liquid level gauge 6, a second connecting pipe 10 having an inner diameter of 9 mm, which is equipped with the second electromagnetic valve 9, and a third electromagnetic valve. Valve 1
The third connecting pipes 12 each having an inner diameter of 9 mm are connected to each other. The liquid supply pipe 2 has an inner diameter of 9 mm.
Further, the liquid supply pipe 2 has the first to third connecting pipes 8 and 1 connected thereto.
Hose for tap water connected to 0 and 12 (not shown)
Intake water, lime nitrate, potassium nitrate, etc. introduced through
A pump 13 is provided. This pump 13 is
Although provided in the liquid pipe 2, the first to third connecting pipes 8 and 1 are provided.
Introduced from a hose for tap water etc. connected to 0 and 12
Water, lime nitrate, nitric acid, etc.
In order to surely suck into the
3 Pressure feed from the position where the connecting pipes 8, 10 and 12 are provided
It is provided in the liquid supply pipe 2 on the side. Therefore, the salary concerned
Mix in the liquid pipe 2 and by using the suction force of the pump 13.
In addition, during the transfer process of the liquid supply pipe 2,
Mix well. Further, the first connection pipe 8, the second connection pipe 10, the third connection pipe 12 (hereinafter, the first connection pipe 8 ~
The third connecting pipe 12 is used. ) Inner diameter (thickness) is determined for the purpose of concentration adjustment. By the way, in each of the first to third electromagnetic valves 7, 9 and 11, the pump 13 provided in the liquid supply pipe 2 causes a current to flow to the liquid level gauge 6 by the timer 14.
When the liquid level 5 detected by the liquid level gauge 6 is below a set value (set level), it is opened, and the first connecting pipe 8 to the third connecting pipe 12 are opened.
A certain amount of water, or lime nitrate, potassium nitrate, magnesia sulfate,
Fertilizer such as sulfuric acid is supplied to the liquid supply pipe 2 in various areas. The first to third electromagnetic valves 7, 9 and 11 are closed when the nutrient solution level 5 detected by the liquid level gauge 6 returns to the set value, and the first to third electromagnetic valves 7 and 9 are closed.
The supply of the water and other fertilizers to the connection pipes 8 to the third connection pipe 12 is stopped.

In the figure, reference numeral 15 designates a command of the timer 14 for each of the first to the first.
Control device for transmitting to the third electromagnetic valve 7, 9, 11 16
Is a strainer, and 17 is a bypass pipe.

Incidentally, FIG. 4 is a flow chart showing an example of the operating condition. When the liquid level gauge 6 is operated (YES) (ST
1), the first to third electromagnetic valves 7, 9 and 11 are opened (ST2), and the pump 13 is operated (ST3).
Liquid supply pipe 2 via connection pipe 8 to third connection pipe 12
The supply of water and other fertilizers is started (ST4), via the strainer 16 and the automatic switching valve 18 (ST5),
The nutrient solution is supplied to the bed 1 (ST6).

When the liquid level gauge 6 is not operated and stopped (NO), the first to third electromagnetic valves 7, 9, 11 are closed (ST7), or the pump 13 is operated, for example. If (ST8), the return liquid pipe 3 and the liquid supply pipe 2,
Via the strainer 16 and the automatic switching valve 18 (ST
9), the nutrient solution is returned to the bed 1. A so-called nutrient solution circulation system is adopted to constantly apply a flow to the nutrient solution and to apply stimulation or oxygen to the roots of the cultivated crop 4. Although not shown, an air supply device may be attached.

[0014]

As described above, according to the present invention, the connection pipes having different inner diameters are provided in the liquid supply pipes, and the electromagnetic valve provided in each connection pipe is opened and closed and the pump suction operation is performed. After sucking water and each fertilizer into the liquid supply pipe,
Mixed in the pipe and using the suction force of the pump,
Is also mixed during the transfer process of the liquid supply pipe to generate a nutrient solution of a predetermined concentration and then supplied to the bed, so that a predetermined amount of water and each fertilizer can be sucked into the liquid supply pipe reliably and smoothly.
Inclusive, and raw nutrient solution having a predetermined concentration were mixed in this liquid supply pipe
It has the effect that the nutrient solution is supplied to the bed. Also
Without providing a nutrient solution tank, pumping water and each fertilizer
Since the nutrient solution is pressure-fed, it can contribute to simplification and downsizing of the hydroponic cultivation device and equipment, facilitation of the hydroponic cultivation, labor saving, and the like. In addition, the liquid level of the bed can be detected
When this happens, the pump is activated to detect water and fertilizer.
Because of the suction structure, the concentration of the nutrient solution in the entire bed can be made uniform by a simple method.

[Brief description of drawings]

FIG. 1 is a schematic view showing the whole of the present invention.

FIG. 2 is an enlarged side view of the bed.

FIG. 3 is an enlarged side view of a main part of a liquid supply pipe.

FIG. 4 is a flowchart showing the movement of the nutrient solution.

[Explanation of symbols]

 1 bed 2 liquid supply pipe 2a supply hole 2b supply hole 3 return liquid pipe 4 cultivated crop 5 nutrient liquid level 6 level gauge 7 1st solenoid valve 8 1st connection pipe 9 2nd solenoid valve 10 2nd connection pipe 11 3rd Electromagnetic valve 12 Third connection pipe 13 Pump 14 Timer 15 Control circuit 16 Strainer 17 Bypass pipe 18 Automatic switching valve

Claims (1)

(57) [Scope of utility model registration request] [Claim 1] and a large number of bed for hydroponic cultivation, this number
Liquid supply pipes connected to the bed of the
One end is connected to the bed and the other end is connected to the liquid supply pipe
Connected to the return liquid pipe for the returned return nutrient solution and the liquid supply pipe
A plurality of connection pipes equipped with electromagnetic valves, a hose for tap water and each hose for feeding fertilizer connected to the connection pipe, and the liquid level gauge and the control device provided in the liquid supply pipe.
An automatic fertilizer applicator for hydroponic cultivation comprising a pump and an automatic switching valve that operate via the pump , wherein the pump provided in the liquid supply pipe is installed in the liquid supply pipe.
It is installed on the pumping side from the plurality of connection pipes
Using the pump,
An automatic fertilizer application device for hydroponic cultivation of a circulation system, which does not include a nutrient solution tank, which sucks fertilizer and mixes it in the liquid supply pipe .