JPH0479614B2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention relates to a nutrient solution magnetization device for hydroponic cultivation.

Background technology Hydroponic cultivation allows cultivation under almost constant conditions, so there is no need to consider obstacles caused by continuous cropping, which is a problem in soil cultivation, gravel cultivation, etc.
It has advantages such as easy and complete treatment of remaining roots and high epidemic prevention effect.

In order to increase the yield and disease resistance of hydroponic cultivation, the cultivation nutrient solution (hereinafter referred to as nutrient solution) is magnetized to increase the oxygen concentration in the nutrient solution, suppress the growth of bacteria, and improve plant physiology. For example, the stimulation etc.
No. 56-10118 and Japanese Patent Application Laid-Open No. 57-29227.

By the way, in order to magnetize the nutrient solution, electromagnets or permanent magnets are installed in the nutrient solution tank or near the nutrient solution flow path to apply a magnetic field to the nutrient solution, but in order to obtain the desired effect, a large magnetic field is required. Since strength is required, the magnetization processing device tends to be relatively large. In addition, since the hydroponic cultivation apparatus can increase or decrease or change the number of cultivation tanks in response to changes in the type of crops or the scale of cultivation, it is also desired that the magnetization treatment apparatus be easy to attach and detach and be compact.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a small-sized nutrient solution magnetization device that applies a strong magnetic field to a cultivation nutrient solution and is easy to attach and detach.

In order to achieve the above object, the nutrient solution magnetization device of the present invention includes an annular magnetization unit comprising an annular magnet magnetized in the central axis direction and an annular magnetic body in contact with a magnetic pole surface of the annular magnet; A nutrient solution magnetizing device for hydroponic cultivation, including a nutrient solution supply means for passing a nutrient solution for hydroponic cultivation through a center hole of the annular magnetic body, wherein the center hole of the annular magnetic body is smaller than the center hole of the annular magnet. It is characterized by

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 shows an example of a hydroponic cultivation apparatus using the nutrient solution magnetization device of the present invention, in which a nutrient solution 2 is supplied from a storage tank 1 to a valve 4 via a non-magnetic pipe 3. The nutrient solution 2 is adjusted to a constant flow rate by a valve 4, passes through a nutrient solution magnetizer 5, magnetizes the magnetic substances and oxygen in the nutrient solution, and then is supplied to one end of the cultivation tank 6. In the middle of the flow path, oxygen is supplied to the nutrient solution 2 by an air pump 7 if necessary. A large number of holes are bored in the lid 8 of the cultivation tank 6, and seedlings 9 supported by water-absorbing members are inserted into these holes. A drainage pipe 10 is provided at the other end of the cultivation tank 6, which also serves to adjust the liquid level of the nutrient solution 2.
The drained nutrient solution 2 is collected into the storage tank 1 by the pump 11.

FIG. 1 shows the external appearance of an example of the nutrient solution magnetization device of the present invention, in which the other ends of holding members 51 and 52, one end of which has a small diameter and the other end of which has a larger diameter, are screwed together.
Each holding member is made of a non-magnetic material such as plastic or non-ferrous metal, and has a built-in annular magnet described below. A synthetic rubber or plastic pipe 3 is removably connected to both ends of the combined holding member.

FIG. 2 is a cross-sectional view of the nutrient solution magnetization device 5 in the central axis direction, and the holding members 51 and 52 are connected by a threaded portion 53. Inside the holding container constituted by the holding members 51 and 52, a pair of annular magnets 54 and 55 made of permanent magnets are arranged facing each other in the central axis direction. Each annular magnet is positioned by being adhered to the inner wall surface of the container or by interposing a spacer 59 therebetween.

A relatively strong magnetic field is formed in the space defined by the pole faces of different magnetic properties of the annular magnets 54 and 55, and the center hole of each magnet is A particularly strong magnetic field is formed in the vicinity. The annular magnet and the magnetic member constitute a magnetization unit. The nutrient solution 2 supplied from the pipe 3 passes through the space between the aforementioned magnetic poles and the center hole of the annular magnet, and the nutrient solution 2 is magnetized.

FIG. 4 shows a perspective view of the magnetization unit.
FIG. 5 is a cross-sectional view in the central axis direction. Annular magnetic members 56a and 56b, which constitute a magnetic circuit, are joined to each of both magnetic pole faces of the annular magnet 54, respectively. The inner diameter of the center hole of each magnetic member is an annular magnet 5
The outer diameter of each magnetic member is smaller than the outer diameter of the magnet 54.

By doing this, a magnetic circuit is formed in the annular magnet as shown in Fig. 7, and the magnetic resistance on the outer circumferential side of this magnetic circuit is increased, while the magnetic resistance on the center hole side is lowered and the density of magnetic lines of force near the center hole is increased. ing. Therefore, a stronger magnetic field can be obtained than in the case of only an annular magnet as shown in FIG. 6, and the annular magnet can be made smaller.

The inside of the magnetizing device 5 having such a structure is filled with the nutrient solution 2, and the inflowing nutrient solution 2 first begins to be magnetized by the magnetic field near the magnet 56, and forms an annular shape generating a strong magnetic field. It passes through the center hole of the magnet 56 and flows through the magnetic field space defined by the annular magnets 56 and 57 in which a relatively strong magnetic field exists, along the direction of the magnetic field, that is, the direction of magnetization of the magnetic substance in the nutrient solution. It passes through the above-mentioned magnetic field space while being magnetized in a substantially constant direction, passes through the center hole of the annular magnet 57 that generates an even stronger magnetic field, and flows out of the magnetization device 5.

In this way, the nutrient solution passing through the magnetization device 5 is efficiently treated by a strong magnetic field whose magnetization direction is set in the flow direction of the nutrient solution by the arrangement of the plurality of annular magnetization units for a predetermined time determined by the flow rate. It remains well magnetized.

In the example, two annular magnets are used, but the annular magnets may be polygonal or cylindrical. If necessary, the number of annular magnets may be increased or decreased, or the flow rate may be appropriately adjusted to adjust the magnetization level of the nutrient solution. It is also possible to set the magnetization strength as desired. In addition, although the magnetization unit in the embodiment has a single center hole, the center hole is not limited to this, but the center hole is composed of a plurality of small diameter holes, and the magnetic field near each small diameter hole is increased to direct the nutrient solution. You may also allow it to pass.

Effects of the Invention As explained above, the nutrient solution magnetization device for hydroponic cultivation of the present invention has a structure in which the nutrient solution is flowed through the center hole of the annular magnet to which the annular magnetic body is bonded and the magnetic field near the center hole is strengthened. Therefore, it is possible to efficiently magnetize the nutrient solution using a relatively small magnetization device, which is preferable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the magnetization device of the present invention, Fig. 2 is a sectional view of the magnetization device shown in Fig. 1, and Fig. 3 is an example of a hydroponic cultivation device using the magnetization device. 4 is a perspective view showing an example of the magnetization unit, FIG. 5 is a sectional view of the magnetization unit shown in FIG. 4, and FIGS. 6 and 7 are diagrams showing the magnetization unit. FIG. 2 is an explanatory diagram for explaining the magnetic flux distribution of FIG. Explanation of symbols of main parts, 51, 52... Holding member, 54, 55... Annular magnet, 56, 57... Annular magnetic body.

Claims (1)

[Scope of Claims] 1. An annular magnetization unit consisting of an annular magnet magnetized in the central axis direction and an annular magnetic body in contact with the magnetic pole surface of the annular magnet, and a center hole of the annular magnetization unit for hydroponic cultivation. A nutrient solution magnetization device for hydroponic cultivation, comprising a nutrient solution supply means for allowing the nutrient solution to pass through, wherein the center hole of the annular magnetic body is smaller than the center hole of the annular magnet. Nutrient solution magnetization device for cultivation. 2. The nutrient solution magnetization device for hydroponic cultivation according to claim 1, wherein the outer diameter of the annular magnetic body is smaller than the outer diameter of the annular magnetic body. 3. The nutrient solution magnetization device for hydroponic cultivation according to claim 1, wherein a plurality of said annular magnetization units are arranged on the same axis at intervals, and the direction of magnetization polarity is constant in the arrangement direction. 4. The annular magnetization unit according to claim 1, wherein each of the annular magnetization units has one end with a small diameter and the other end with a large diameter, and is held by a pair of holding members whose other ends are screwed together. Nutrient magnetization device for hydroponic cultivation.