JP3027575B1 - Hydroponics equipment - Google Patents

Abstract

An object of the present invention is to accurately maintain an environment and reduce running costs. A medium, a nutrient solution tank, a pipeline for feeding a nutrient solution from the nutrient solution tank to the medium, a collection tank for collecting surplus water supplied to the medium and flowing through the medium, A purification device that filters, sterilizes, and purifies the excess water pumped from the recovery tank by a pump, and a mixture of the excess water after the purification treatment that has passed through the purification device and the nutrient solution drawn from the nutrient solution tank and sends it to the culture medium. A hydroponic cultivation device is configured with an automatic nutrient solution mixing device to make the circuit of the nutrient solution a closed type, and surplus water after purification treatment in the automatic nutrient solution mixing device and nutrient solution fed from the nutrient solution tank. The ratio of excess water to the nutrient solution is suppressed to at least a fraction or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hydroponic system for growing plants by supplying a culture solution formed of gravel or rock wool with a hydroponic solution capable of dissolving and adjusting nutrients essential for plant growth in water. It relates to improvement of a cultivation device.

[0002]

2. Description of the Related Art Conventionally, a hydroponic cultivation apparatus of the above-described type has a medium a formed by filling a pot or a pot with gravels or rock wool as shown in FIG.
Are arranged side by side in a basin-shaped container b which is placed at a predetermined position in the greenhouse or the greenhouse 1, and the nutrients necessary for growing the crop are dissolved in water in these mediums a and separately adjusted. The nutrient solution stored in the nutrient solution tank T is supplied through the irrigation device c, and the excess nutrient solution flowing through the culture medium a.
The water is collected in a basin-shaped container b, and is discharged from a drain port d thereof into a drainage groove or an excess water recovery tank e laid in a greenhouse or a house.

[0003]

The conventional hydroponic cultivation apparatus described above uses the excess water (excess nutrient solution) collected in the excess water recovery tank.
Means to infiltrate into the basement from the wall surface of the recovery tank, causing high humidity in the greenhouse or house, causing disease such as gray mold, and also discharging excess water from the drainage channel to the drain. There is a problem with the means of draining and abandoning that the environment on the downstream side of the drainage ditch is deteriorated and the crops in the downstream area are affected. Further, there is a problem in that running costs are increased by discarding surplus water.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the conventional hydroponic cultivation apparatus, and provides a new means capable of accurately preserving the environment and reducing running costs. The purpose is to provide.

[0005]

Means for Solving the Problems In the present invention, as a means for achieving the above-mentioned object, a medium a to be installed in the greenhouse 1 or the house, a nutrient solution tank T for storing a nutrient solution, A pipe 2 for feeding nutrient solution from the nutrient solution tank T to the culture medium a, a collection tank e for collecting surplus water supplied to the culture medium a and flowing through the culture medium, and a pump P
A purification device w for filtering, sterilizing and purifying the excess water pumped by the above, and the surplus water after the purification treatment passing through the purification device w and the nutrient solution drawn out from the nutrient solution tank T are mixed, and a culture medium a Nutrient solution mixing device 5 to be sent to the apparatus, and a pipeline 7 for feeding surplus water that has passed through the purification device w to the nutrient solution mixing device 5
A valve 6 for controlling the flow of excess water, and a pipe 2 for feeding a nutrient solution from the nutrient solution tank T to the automatic nutrient solution mixing device 5.
And a valve 8 for controlling the flow of nutrient solution provided in the
With these, the circuit of the nutrient solution is closed, and the mixing ratio of surplus water and nutrient solution in the automatic nutrient solution mixing device 5 is
A hydroponic cultivation apparatus wherein the excess water and the nutrient solution in the pipes 7 and 2 are controlled so that the excess water is at least a fraction of the nutrient solution. It is to raise.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the means of the present invention, a basin-shaped container is installed in a greenhouse or a house, and inside it,
A culture medium formed by filling gravel, pebbles, rock wool, etc. in a pot or a pot is arranged in parallel, and plant seeds or seedlings are planted in the culture medium. Then, a nutrient solution prepared by dissolving nutrients indispensable for the growth of the plant in water is stored in a nutrient solution tank, and a predetermined amount is fed from the tank to the culture medium by a pump or a head difference. Excess nutrient solution that flows through the culture medium and accumulates in a basin-shaped container is collected from a discharge port provided in the container into a surplus water collection tank that is installed in a predetermined location such as a greenhouse or house. This may be configured in the same way as the conventional means, but the recovery tank for collecting excess nutrient solution should not be of the infiltration type, but should be formed in a watertight closed tank, and the excess water to be collected here should be pumped up by a pump. , And is recycled to a purification device equipped with a filtration device and a sterilization device. Then, at the time of reuse, the purified surplus water is mixed with the nutrient solution sent from the nutrient solution tank at a fraction of at most 30% or less, and is again added to the culture medium. To supply. Thus, the circuit of the nutrient solution is completely closed, and the influence of the remaining nutrients in the surplus water is suppressed.

[0007] A purifying apparatus for purifying the collected surplus water for reuse is composed of two water tanks each having a capacity of about 30% of the amount of nutrient solution supplied to the culture medium, a filter, ozone and water. It may be configured by combining with a sterilizing device using ultraviolet light or heat treatment, and combining them such that excess water collected in one of the water tanks is collected in the other water tank through the filter and the sterilizing device in that order.

[0008] The purified water treated by the purifying device is combined with the nutrient solution supplied from the nutrient solution tank at a predetermined ratio, fed to the automatic nutrient solution mixing device, and then supplied to the culture medium. Then, the mixing ratio of the surplus water after the purification treatment to the nutrient solution at this time is controlled to be within 30%.

[0009]

Next, an embodiment will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for components having the same effects as those of the conventional means.

FIG. 2 is a development view of a hydroponic cultivation apparatus A for carrying out the present invention, wherein 1 is a greenhouse, a ... is a medium formed by filling a pot with gravel or rock wool, and b is a medium a. Are placed in parallel, and a basin-shaped container placed in the greenhouse 1, T is a nutrient solution tank for storing a previously adjusted nutrient solution, and 2 is pumped from the nutrient solution tank T by a head difference or a pump. A pipe for guiding the nutrient solution to be discharged, c is a watering device for irrigating the culture medium a with the nutrient solution drawn from the nutrient solution tank T by the pipe line 2, and d is irrigated with the medium a and passed therethrough to form a basin. A discharge port provided in the container b to discharge the excess water collected in the container b, a water-tight recovery tank installed in the greenhouse 1 to collect the discharged excess water, and w a recovery tank e Purification device that filters, sterilizes, and reuses excess water pumped up by pump P from 1 is a tank for storing the excess water pumped up by the pump P, 3 is a filter for filtering the excess water derived from the tank t1, 4 is a sterilizer for sterilizing the excess water filtered by the filter 3, and t2. Is a tank for storing excess water purified by filtration and sterilization, and 5 is a nutrient solution guided from the nutrient solution tank T and a cleaning solution purified by the purification device w and guided from the excess water tank t2. The automatic nutrient solution mixing device for mixing the excess water with a predetermined ratio, and a pipe 6 for controlling the flow amount of the excess water after the cleaning treatment led out from the tank t2 of the cleaned excess water through the pipe 7. A valve 8 provided in the line 7 is a valve provided in the line 2 so as to control the amount of the nutrient solution introduced through the line 2.

The surplus water supplied to the culture medium a and collected in the collection tank e by flowing through the medium a is pumped by the pump P to the surplus water tank t1 of the purification device w. The tank t1 may be a water tank having a capacity of about 30% of the supply amount of the nutrient solution supplied from the nutrient solution tank T to the culture medium a.

The excess water pumped out here flows out through a strainer 90 to a pipe 91 and is supplied to the filter 3. The filter 3 is a conventional one that filters out dirt and scale, and the excess water flowing through the filter 3 and flowing out from an outlet 30 thereof is passed through a pipe 31 connected to the outlet 30 and a sterilizing device 4. , Where it is sterilized. The sterilizing device 4 may be of an appropriate type such as a type using ultraviolet light, a type using ozone, or a type that sterilizes by heating using a heater. And
Excess water that has been sterilized and purified by the sterilizer 4 flows into the tank t2 via the pipe 40, is stored therein, and is fed from the tank t2 via the pipe 7 and the valve 6 provided therein. It flows into the automatic liquid mixing device 5.

At this time, the surplus water flows into the automatic nutrient solution mixing device 5 at a controlled mixing ratio of 30% or less with respect to the nutrient solution fed from the nutrient solution tank T via the pipe line 2. Here, a mixed solution is supplied again to the culture medium a.

Thus, in this hydroponic cultivation apparatus A, the surplus water supplied from the nutrient solution tank T to the culture medium a and passed through the culture medium a is supplied to the purification device w to be purified and re-purified. Is supplied to the purifying device w, the circuit of the nutrient solution is closed, and the environment in the greenhouse 1 and the basin on the downstream side of the facility is preserved.
Since the nutrient solution is circulated in the closed circuit and supplied to the medium, the amount of water consumed and the fertilizer element can be reduced, and the running cost can be reduced.

[0015]

As described above, in the hydroponic cultivation device according to the present invention, the nutrient solution fed from the nutrient solution tank after the surplus water of the nutrient solution flowing through the culture medium is purified by the purification device. In this way, the nutrient solution circuit is closed so that it is mixed at a ratio of at least one-fourth or less and supplied to the medium again, so that environmental preservation is properly performed and running is performed. The cost can be reduced, and the mixing ratio of the purified surplus water to the nutrient solution guided from the nutrient solution tank is suppressed to a fraction or less, so that the influence of residual nutrients in the surplus water can be suppressed. Become.

[Brief description of the drawings]

FIG. 1 is an expanded sectional view of a conventional hydroponic cultivation apparatus.

FIG. 2 is a developed sectional view of the hydroponic cultivation apparatus according to the present invention.

[Explanation of symbols]

A: hydroponic cultivation device, T: nutrient solution tank, P: pump, a ...
Culture medium, b: container, c: irrigation device, d: outlet, e: collection tank, w: purification device, 1 ... greenhouse, 2 ... pipeline, 3 ... filter
30 ... outlet, 31 ... pipe, 4 ... sterilizer, 40 ... pipe,
5: Nutrient liquid automatic mixing device, 6: Valve, 7: Pipe line, 8: Valve, 90: Strainer, 91: Pipe line.

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Claims (1)

(57) [Claims] 1. Medium a to be set in greenhouse 1 or house
And a nutrient solution tank T for storing nutrient solution, and the nutrient solution tank T
A collection line e for supplying a nutrient solution to the culture medium a, a collection tank e for collecting surplus water supplied to the culture medium a and flowing through the culture medium,
A purifier w for filtering, sterilizing and purifying excess water pumped from the recovery tank by the pump P is mixed with the surplus water after purification through the purifier w and the nutrient solution drawn out from the nutrient solution tank T. An automatic nutrient solution mixing device 5 for sending the mixed solution to the culture medium a; and a valve 6 for controlling the flow rate of excess water provided in a pipe 7 for feeding surplus water that has passed through the purification device w to the automatic nutrient solution mixing device 5. And a valve 8 for controlling the flow rate of the nutrient solution provided in the pipe line 2 for feeding the nutrient solution from the nutrient solution tank T to the automatic nutrient solution mixing device 5. The mixing ratio between the excess water and the nutrient solution in the automatic nutrient solution mixing device 5 is controlled by controlling the excess water and the nutrient solution in the pipes 7 and 2 so that the excess water is at least The feature is that it is controlled to a ratio that is less than a fraction. Hydroponics device that.