JP4867832B2 - Seaweed aquaculture equipment - Google Patents

Description

The present invention relates to a seaweed culture device suitable for use in seaweed culture .

As one of the seaweed aquaculture, submerged aquaculture bases with seaweed larvae etc. attached to the aquaculture tank set up on the land, nurture seaweeds in this aquaculture tank, and then use the aquaculture base There is a known method of moving from a culture tank to natural seawater and culturing it in this natural seawater. In this method, in the process of raising seedlings in the aquaculture tank, it is common to nurture seedlings by irradiating the aquaculture base with natural sunlight.
In addition, in order to allow seedlings to grow in buildings that are not exposed to sunlight, and to make them less susceptible to the effects of fluctuations in sunshine hours due to the season and climate, light is applied to the larvae of the aquaculture base using an illumination device that uses LEDs as a light source. Is also known (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-178947

However, in the conventional illuminating device, there was no LED illuminating device installed by being submerged in a water tank such as a culture tank. Therefore, conventionally, the LED lighting device is attached to the inner wall surface of the aquaculture tank with the end on the side where the power cable is connected from the water surface so that the LED lighting device is not submerged, and the aquaculture base is provided from this inner wall surface. It is set as the structure which irradiates light toward.
In such a configuration, light is irradiated from the inner wall surface to the aquaculture base, so that it is difficult for light to reach the bottom surface of the aquaculture base and uneven irradiation on the aquaculture base tends to occur. There is a problem that there is a difference in the degree of raising seedlings.
As described above, when the degree of seedling raising is different, the culture base cannot be transferred to natural seawater until all seedlings are raised to some extent, resulting in a problem that the cultivation period is extended. .
The present invention has been made in view of the above-described circumstances, can be installed by being submerged in water, and further, when installed in a water tank, accurately irradiates a predetermined object in the water tank. An object is to provide a seaweed culture device that can be used.

In order to achieve the above object, the present invention provides an aquaculture platform that is disposed in an aquaculture tank containing seawater for aquaculture of seaweeds and whose upper surface is illuminated by sunlight from the upper surface opening of the aquaculture tank. A seaweed aquaculture apparatus comprising: aquaculture base to which seaweed buds are attached; and an aquaculture LED lighting device that irradiates the aquaculture base with light emitted from the LED , wherein the LED includes a plurality of LEDs arranged The bar member is fixed to the inside of the case body, the case body is sealed in a state where the power cable is pulled out, and the floor surface or the inner surface of the culture tank at a position lower than the aquaculture base in the culture tank The aquaculture LED lighting device is configured by providing the case body with a posture holding portion for holding the case body in a predetermined posture, and the LED illuminates the aquaculture base from the upper surface opening of the aquaculture tank light's Lights over time according to Teruryou, and then irradiating the algae floor of the lower surface of the aquaculture base.

Further, the present invention provides the seaweed aquaculture apparatus according to the above invention, wherein the light that is emitted from the LED bar member and travels toward the aquaculture base is spread over substantially the entire area of the algae bed on the bottom surface of the aquaculture base. A member is provided.

  Moreover, the present invention is characterized in that, in the aquaculture LED lighting device according to the above invention, a satin finish that causes scattering of the emitted light is formed on the light emitting surface of the optical member.

According to the present invention, a plurality of LEDs are arranged, the LED bar member from which a power cable connected to an external power source is pulled out is fixed inside the case body, and the case body is sealed with the power cable pulled out. Since it is set as the structure which stops, the LED lighting apparatus for culture | cultivation of the waterproof structure which incorporated the LED light source is implement | achieved.
Furthermore, by arranging a plurality of LEDs with LED bar members and storing them in the case body, it becomes possible to store and fix the plurality of LEDs at once in the case body in a state where the arrangement intervals and positions of each LED are accurately aligned, Good assemblability can be realized.
Also, since you are configured to seal the LED bar member in a state of pulling out the power cable from the case body, while submerged aquaculture LED lighting device in a water tank in which stored the water, LED bar aquaculture LED lighting device from the water bath outside Power can be supplied to the member to light it. Thereby, since it is not necessary to provide a power supply inside the case body of the LED lighting device for aquaculture, the device can be reduced in size and simplified.
In addition to this, since the case body is provided with a posture holding portion that holds the case body in a predetermined posture with respect to the floor surface of the water tank in the water tank in which water is stored, the aquaculture LED lighting device is provided in the water tank. When installed, the light irradiation direction of the LED bar member fixed inside the case body can be fixed in a predetermined direction, so that it is possible to accurately irradiate a predetermined object in the water tank. It becomes.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a seaweed aquaculture apparatus 1 according to the present embodiment, where (A) shows a cross-sectional view of the seaweed aquaculture apparatus 1 from the side, and (B) shows a plan view. As shown in this figure, a seaweed aquaculture apparatus 1 includes a culture tank 2 for storing seawater for cultivating seaweeds such as mozuku, and a plurality of aquaculture tanks that are submerged in the seawater of the culture tank 2. An aquaculture base 4 provided with LED lighting devices 3 and having seaweed buds or the like adhered thereto in the seawater of the aquaculture tank 2, and each aquaculture LED lighting device 3 is attached to the aquaculture base 4 On the other hand, seaweed is cultivated by irradiating light.

  The aquaculture tank 2 is configured in a rectangular shape with an upper surface opened in a rectangular shape having a width W of about 2M (M: meter), a length L of about 7M, and a height of about 0.6M. Concrete and the like excellent in durability and corrosiveness are used. Such an aquaculture tank 2 can be used in a building having a daylighting window large enough to illuminate the entire top surface of the aquaculture tank 2 with natural sunlight S (see FIG. 2) or on the entire top surface. Is installed in a vinyl house made of a permeable material such as a vinyl sheet having excellent durability, and the aquaculture base 4 inside the aquaculture tank 2 is illuminated from above by sunlight S during the day. It has become. At this time, since the side surface of the culture tank 2 is opaque, the sunlight S does not enter from the side surface to the inside.

  As shown in FIG. 1 (B), inside the aquaculture tank 2, two mounting columns 5 extending in the direction of the length L are arranged at substantially equal intervals in the direction of the width W. As shown in FIG. 1 (A), each of the supporting columns 5 has a predetermined length from the bottom floor surface 2A of the aquaculture tank 2 by support legs 6 erected at substantially equal intervals in the direction of the length L of the aquaculture tank 2. Arranged at the height Ha. This height Ha is set at a position lower than the water level 8 of seawater stored in the aquaculture tank 2, and the aquaculture base 4 is placed on the two placement struts 5, thereby aquaculture. The base 4 is held in seawater in a state of being separated from the bottom floor surface 2A of the culture tank 2.

  The aquaculture base 4 is formed, for example, by attaching algae beds 7A and 7B to which seaweed spores can be attached to the front and back surfaces of a base formed in a rectangular plate shape having a size of 1M × 1M. These algae beds 7A and 7B are formed, for example, in the form of a cloth formed from natural fibers or synthetic fibers, or in a net state, and seaweed spores are mixed in the nets and the buds are fixed. . The base on which such algae beds 7A and 7B are attached has a mass that can prevent floating in seawater. Then, as shown in FIG. 1A, such an aquaculture base 4 is submerged in seawater at an appropriate interval and placed on the placing column 5 in the aquaculture tank 2.

  FIG. 2 is a view of a cross section taken along line XX in FIG. As shown in this figure, a plurality of air supply pipes 9 made of vinyl chloride are laid on the bottom floor surface 2 </ b> A of the culture tank 2. These air supply pipes 9 are provided with a large number of holes and air is introduced from an air supply pump (not shown) installed outside the culture tank 2. Air is appropriately supplied from the supply pipe 9 into the seawater.

  Here, in a state where the culture base 4 is placed on the placement support 5 of the culture tank 2, the upper surface of the culture base 4 (the surface facing the top opening) by sunlight S incident from the top opening of the culture tank 2. ) Side algae bed 7A is illuminated, but sunlight S does not illuminate the algae bed 7B on the lower surface of the aquaculture base 4 (the surface facing the bottom floor surface 2A). That is, in the bottom algal bed 7B, sunlight is insufficient, and the balance of sunlight is lost between the top side algal bed 7A and the bottom side algal bed 7B, resulting in a difference in the degree of seedling (growth speed). Therefore, conventionally, the upper and lower surfaces of the aquaculture base 4 are manually replaced at regular intervals to maintain the sunshine balance, or the lower surface side is not provided with the algal bed 7B, but the upper surface side algal bed 7A. However, there is a problem that it is troublesome to manually replace the aquaculture base 4 upside down, and the aquaculture using only one side of the aquaculture base 4 has poor productivity.

  Therefore, in the present embodiment, the algae bed 7B on the lower surface side of the aquaculture base 4 is illuminated by the aquaculture LED lighting device 3 to compensate for the sunshine balance with the algae bed 7A on the upper surface side. The configuration of the aquaculture LED lighting device 3 will be described in detail below.

FIG. 3 is a diagram showing a schematic configuration of the aquaculture LED lighting device 3, (A) is a perspective view showing the whole, and (B) is a view of the section thereof.
As shown in this figure, the aquaculture LED lighting device 3 includes an acrylic transparent cylindrical case body 30 having a length of about 60 CM, and an LED bar member fixed inside the case body 30. And a case support leg 32 as a posture holding portion for holding the case body 30 in a posture in which the long axis K of the case body 30 is substantially horizontal with respect to the bottom floor surface 2A of the culture tank 2 And a triangular prism 33 as an example of a transmissive optical member that controls the emitted light so that the substantially entire surface of the algal bed 7B on the lower surface of the aquaculture base 4 is irradiated by the emitted light of the LED bar member 31. .

  The LED bar member 31 emits a light amount for supplementing the sunlight S that illuminates the aquaculture base 4 from the upper surface opening of the culture tank 2, or light having a light amount and a wavelength, and at least the growth of algae to be cultured It has the some LED40 which radiates | emits the light of the wavelength which contributes effectively to. As the LED 40, one that emits white light or one that emits monochromatic light having a wavelength that contributes to the growth of seaweeds is used. At this time, when the monochromatic LED 40 is used, the growth of seaweeds can be more effectively promoted by using a combination of two or more LEDs 40 having different wavelengths of emitted light.

  The LED bar member 31 has a total of two LEDs in which a plurality of LEDs 40 as described above are arranged in two rows on a substrate 41, and each LED 40 is electrically connected in series for each row (or may be connected in parallel). The line devices 42 are arranged in a straight line and fastened to a plate-like support pillar 45. Further, from one end portion of the LED bar member 31, a power cable 47 connected to each LED line device 42 and supplying electric power from the outside is drawn out, and is attached to the support pillar 45 in order to restrict movement in the case body 30. Fastened with a fastener 48.

  When the LED bar member 31 having the above configuration is assembled to the case body 30, the power cable 47 is pulled out and inserted into the inside from the insertion end portion 30 </ b> A that is one end portion of the case body 30, as shown in FIG. As described above, both sides 45 </ b> A of the support pillar 45 are brought into contact with the inner peripheral surface of the case body 30 and are held inside the case body 30. At this time, since the plurality of LEDs 40 are linearly arranged by the LED bar member 31 and accommodated in the case body 30, each LED 40 is accommodated in the case body 30 in a state where the arrangement intervals and positions of each LED are accurately aligned. This makes it possible to achieve good assemblability.

Then, after housing the LED bar member 31 in the case body 30, a transparent mold resin material 50 is poured from the insertion end 30 </ b> A of the case body 30 to mold the LED bar member 31, and the LED bar member is placed inside the case body 30. 31 is fixed, and then the insertion end portion 30A is sealed with the lid member 35 made of acrylic resin, whereby the assembly of the waterproof LED lighting device 3 for aquaculture is completed.
The lid member 35 is formed with an extraction hole 35A, the power cable 47 is extracted from the extraction hole 35A, and a sealing member 49 for filling the gap between the power cable 47 and the extraction hole 35A is extracted. The hole 35A is fitted into the hole 35A, thereby improving the waterproofness of the case body 30.

  As described above, on the outside of the case body 30, a case as a posture holding portion that holds the case body 30 in a posture in which the long axis K of the case body 30 is substantially horizontal with respect to the bottom floor surface 2 </ b> A of the culture tank 2. Support legs 32 are provided. This case support leg 32 is attached to the case body 30 so that the light irradiation direction of each LED 40 included in the LED bar member 31 faces upward when the case body 30 is supported on the bottom floor surface 2A of the aquaculture tank 2. Thus, the light is accurately irradiated to the algal bed 7B on the lower surface of the aquaculture base 4 by each LED 40 of the LED bar member 31 only by sinking the case body 30 in the aquaculture tank 2. It becomes.

  The radiated light Y of each LED 40 of the LED bar member 31 is incident on the triangular prism 33 made of acrylic provided on the outside of the case body 30 so as to face each LED 40, and the irradiation direction is deflected so that the irradiation range is widened. And emitted from the triangular prism 33. At this time, the divergence angle θ (see FIG. 2) of the radiated light Y emitted from the triangular prism 33 is set so as to irradiate substantially the entire area of the algal bed 7B on the lower surface of the aquaculture base 4 with the aquaculture base 4. It is defined by the relative positional relationship with the aquaculture LED lighting device 3 and the width of the algal bed 7B on the lower surface of the aquaculture base 4.

Further, the surface of the light exit surface 33A, which is the two surfaces constituting the triangular prism 33, is formed in a satin finish, and the light emitted from each light exit surface 33A is scattered, so a relatively wide area is uniformly irradiated. It becomes possible to do.
Needless to say, the triangular prism 33 and the case body 30 may be integrally formed of an acrylic resin or the like.

In the seaweed aquaculture apparatus 1, a plurality of aquaculture LED lighting apparatuses 3 configured as described above are arranged on a substantially center line of the bottom floor surface 2 </ b> A of the aquaculture tank 2 as shown in FIGS. 1 and 2. Are arranged in a straight line along. The ends of the power cables 47 drawn out from each of the aquaculture LED lighting devices 3 are connected to a power supply (not shown) installed outside the aquaculture tank 2, and each aquaculture LED illumination is supplied with power from the power supply. The device 3 is lit.
At this time, power supply to the aquaculture LED lighting device 3 is performed in accordance with sunlight. Specifically, for example, a power supply control device that starts power supply at the sunrise time of the day and stops the power supply at sunset time, a timer device that counts the sunshine time of the day, or an illuminance sensor The power supply according to the sunlight of the sunlight S is performed using a power supply control device or the like that supplies power only while the sunlight illuminates the aquaculture tank 2. The aquaculture LED lighting device 3 is turned on for a time substantially proportional to the amount.

  When the aquaculture LED illuminating device 3 is turned on, the light intensity by which the illuminance by the radiated light Y is about 5000 lx (lux) at a point about 100 mm away from the aquaculture LED illuminating device 3 along the emission direction. The algae bed 7B on the lower side of the aquaculture base 4 is illuminated with the radiant light Y having such intensity. In seaweeds, the light compensation point, which is the light intensity at which the amount of photosynthesis and the respiration rate are equal, is about 1 lx even in seaweeds with the lowest light compensation point. The algal bed 7B is illuminated with light having a sufficient intensity for photosynthesis.

In addition, the LED bar member 31 should just have LED40 to the extent which emits the light of the quantity which can illuminate the algae bed 7B of the lower side of the culture | cultivation base | substrate 4 with the illumination intensity of 1 lux or more.
In addition, when the illuminance on the lower algal bed 7B of the aquaculture base 4 is higher than the illuminance of the upper algal bed 7A due to the irradiation of sunlight by irradiation with the LED lighting device 3 for aquaculture, In order to match the degree of seedling with the algal bed 7A, the lighting time of each aquaculture LED lighting device 3 is shortened.

Next, seaweed aquaculture using the seaweed aquaculture apparatus 1 will be described. In addition, below, an example in the case of cultivating the mozuku which is an example of seaweed according to the climate of Japan is demonstrated.
A mozuku farmer, for example, collects mozuku mother algae in autumn (late September to early October), and puts the mother algae together with the aquaculture base 4 into the aquaculture tank 2 filled with aquaculture seawater. Then, by performing aeration culture for several days while supplying air to the air supply pipe 9, spores are released from the mother algae, and these spores settle on the algae beds 7A and 7B of the aquaculture base 4 to complete seeding. . During the seeding period for the aquaculture base 4, it is not necessary to perform light irradiation for the aquaculture, and therefore the energization of the aquaculture LED lighting device 3 is not performed.

After the seeding, intermediate growth is performed until a seedling of about 1 mm appears on the algae beds 7A and 7B of the aquaculture base 4 (for example, 20 days). During 20 days, culture is performed in the culture tank 2 at a growth temperature (water temperature) of 25 to 26 ° C. During this aquaculture period, irradiation is performed by the aquaculture LED lighting device 3, and the light irradiation amount is substantially the same between the upper algal bed 7A and the lower algal bed 7B of the aquaculture base 4. The irradiation amount of the aquaculture LED lighting device 3 is appropriately controlled. As a result, the growth speed of the shoots is almost the same between the algal bed 7A and the algal bed 7B. In addition, although the heat generation is generated by turning on the LED lighting device 3 for aquaculture, the inventors have experimented that the temperature rise of the seawater in the aquaculture tank 2 due to the heat generation is slight and does not cause a problem for breeding seedlings. It has been revealed.
Then, after the buds become algal bodies, for example, the aquaculture base 4 is moved offshore, and when the algae grows to about 20 to 30 cm from March to May, the aquaculture base 4 is used using a pump. The algae beds 7A and 7B are aspirated to collect mozuku.

  As described above, according to the present embodiment, the LED bar member 31 in which the plurality of LEDs 40 are arranged is fixed inside the case body 30, and the power cable 47 is sealed in a state of being pulled out from the case body 30. did. With this configuration, a waterproof lighting device is provided, and a plurality of LEDs 40 can be housed and fixed in the case body 30 at the same time in a state in which the arrangement intervals and positions of the LEDs 40 are accurately aligned. Can be realized.

Furthermore, according to this embodiment, since it is set as the structure which seals the LED bar member 31 in the state which pulled out the power cable 47 from the case body 30, a culture tank is immersed in the culture LED lighting device 3 in the culture tank 2 The LED 40 can be turned on by supplying power to the LED bar member 31 from the outside of the LED 2. Thereby, since it is not necessary to provide a power supply in the case body 30 of the LED lighting device 3 for aquaculture, the device can be reduced in size and simplified.
In addition to this, according to the present embodiment, the case support legs 32 are provided as posture holding portions for holding the posture of the case body 30 with respect to the bottom floor surface 2A of the culture tank 2 in the culture tank 2. When the aquaculture LED lighting device 3 is installed in the aquaculture tank 2, the light irradiation direction of the LED bar member 31 can be fixed in a certain direction. Thereby, it becomes possible to irradiate light precisely with respect to the culture | cultivation base | substrate 4 arrange | positioned in the culture tank 2. FIG.

Further, according to the present embodiment, the LED bar member 31 is configured to emit light having a light amount or a wavelength that supplements natural light that illuminates the aquaculture base 4 from the upper surface opening of the culture tank 2. Even if the sunlight S that illuminates the aquaculture base 4 from the opening does not reach the algae bed 7B on the lower side (back side) of the aquaculture base 4, it is supplemented by the aquaculture LED lighting device 3. It is possible to equalize the amount of light irradiation between the upper algal bed 7A and the lower algal bed 7B, and to equalize the degree of seedling raising.
Moreover, since the growth of a seaweed does not become slow only by the lower algal bed 7B which sunlight S does not reach by this, culture | cultivation period does not extend by lack of sunlight.
Further, the aquaculture LED lighting device 3 does not provide all the light necessary for raising seedlings, but only supplements the sunlight S. Therefore, the output and the number of LEDs 40 required for the supplementary light are used. The LED bar member 31 can be reduced in size, reduced in heat generation, and saved in power, while preventing the culture period from being delayed.

Moreover, according to this embodiment, since the triangular prism 33 which expands the spreading | diffusion angle (theta) of the emitted light of the LED bar member 31 was provided in the case body 30, the wide range of the culture | cultivation base | substrate 4 can be illuminated. In particular, since a matte surface is formed on the light emitting surface 33A of the triangular prism 33 to cause scattering, a relatively wide area can be uniformly irradiated.
In addition, according to the present embodiment, the LED bar member 31 emits a light amount at which the illuminance of the light irradiated to the algal bed 7B is at least about 1 lx or more necessary for raising seaweed seedlings. Photosynthesis is possible.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
For example, in the above-described embodiment, the case body 30 that is transparent as a whole is used. However, the case body 30 may not be transparent as long as at least the surface facing the LED 40 is transparent.
For example, in the embodiment described above, the case support leg 32 is provided separately from the case body 30. However, for example, a flat surface may be formed on the case body 30 and the posture may be held on this surface.
Further, for example, the aquaculture LED lighting device 3 is installed and fixed on the inner surface of the aquaculture tank 2 not on the floor surface of the aquaculture tank 2 so that the case support legs 32 hold a predetermined posture, and the aquaculture is started from the inner surface. It is good also as a structure which irradiates the board | substrate 4 for use.
Further, for example, in the above-described embodiment, a substantially rectangular plate-shaped aquaculture base 4 is used. However, the aquaculture base 4 may be of an arbitrary shape such as a columnar shape (roll type). Is possible. And even if it is the culture | cultivation board | substrate 4 of any shape, the lower side of the culture | cultivation board | substrate 4 which sunlight S cannot reach easily is illuminated efficiently by the LED lighting apparatus 3 for culture | cultivation, and the irradiation light amount in the culture board | substrate 4 is equalize | homogenized Can be achieved.
Further, the aquaculture LED lighting device 3 may be used for illumination by being submerged in a water tank or a pool.

It is a figure which shows the structure of the seaweed cultivation apparatus which concerns on embodiment of this invention, (A) shows the figure which looked at the cross section, (B) shows a top view. It is a figure which shows the cross section in the XX line of FIG. 1 (B). It is a figure which shows schematic structure of the LED lighting apparatus for culture, (A) is the perspective view which shows the whole, (B) is the figure which looked at the cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seaweed culture apparatus 2 Culture tank 3 Culture LED lighting apparatus 4 Culture base 7A, 7B Algae bed 30 Case body 31 LED bar member 32 Case support leg 33 Triangular prism 33A Light emission surface 40 LED
47 Power cable 50 Mold resin material

Claims (2)

An aquaculture base that is placed in an aquaculture tank containing seawater for aquaculture of seaweeds, and whose upper surface is illuminated by sunlight from the upper surface opening of the aquaculture tank, to which seaweed buds are attached And a seaweed aquaculture device provided with an aquaculture LED lighting device that irradiates the aquaculture base with light emitted by an LED,
An LED bar member in which a plurality of LEDs are arranged is fixed inside the case body, the case body is sealed in a state where the power cable is pulled out, and the culture is performed at a position lower than the culture base in the culture tank. The aquaculture LED lighting device is configured by providing the case body with a posture holding portion that holds the case body in a predetermined posture with respect to the floor surface or the inner side surface of the tank ,
Said LED, said illuminate aquaculture foundation from the upper opening of the aquaculture tank lights over time according to the amount of sunshine sunlight, seaweed farming, which comprises irradiating the algae floor of the lower surface of the aquaculture base Equipment . In the seaweed aquaculture apparatus according to claim 1,
An algae culture apparatus comprising: an optical member that spreads light emitted from the LED bar member toward the aquaculture base over substantially the entire area of the algae bed on the bottom surface of the aquaculture base.

Images