JP2007167029A - Aquarium system for raising aquatic animal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aquarium system for raising aquatic organism, for efficiently conducting an oxidative decomposition of substances causing water pollution and offensive odor emission and preventing producing microbes and algae by efficiently contacting the circulating water in an aquarium with a photocatalyst and also improving the neat appearance in the aquarium as well, and also free of possibility of damaging, debonding and/or losing photocatalyst layers even in the aquarium's cleaning operation. <P>SOLUTION: The aquarium system for raising aquatic organism comprises an aquarium body, a back screen set at the depth of the aquarium body and a circulator for circulating the water in the aquarium body, wherein the circulator comprises a filtration tank with a filter-type attachment board for removing impurities in the water and a circulating path via which water is circulated through the filtration tank. In this aquarium system, the filtration tank has a filter material for removing impurities on the underside of the attachment board, and the respective surfaces of the back screen and the attachment board are furnished with photocatalyst layers. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an aquarium for breeding aquatic animals used for breeding and viewing primary aquatic animals such as goldfish, tropical fish, other medaka, white medaka, yellow trout, amago, warbler, oikawa, etc. Algae etc. that are placed in contact with water, decompose organic matter such as aquatic animal discharges and remaining bait rot in the water, remove bad odors caused by them, and impair the beauty It is related with the aquarium system for aquatic animal breeding which can control growth of water.

  Aquariums are widely used for breeding fish such as tropical fish and goldfish for viewing at home and in offices. Generally, a water tank is comprised from the water tank main body by which the upper surface was open | released, and the bottom wall and four side walls of the water tank main body are formed from transparent glass or plastic. When rearing fish, clean the aquarium, place an appropriate amount of water in it, and release the fish into the aquarium. And if necessary, an air supply means for supplying air to the water, a filter means for removing impurities contained in the water, a heater means for keeping the water at an appropriate temperature, and for illuminating the inside of the water tank Illumination means are provided. Also, depending on the breeder's preference, pottery such as waterwheels, bridges, gravel, aquatic plants, etc. are placed in the aquarium as accessories for making the aquarium look beautiful.

  However, when fish are raised in the water tank configured as described above, the water in the water tank is contaminated by food fed to the fish, discharges discharged by the fish, etc., and the water must be exchanged at an appropriate frequency. In addition, when reared in this manner, algae, moss, etc. are generated on the inner surface of the aquarium, the surface of accessories, etc., and the algae, moss, etc. attached at an appropriate frequency must be removed. In particular, if algae, moss, or the like adheres to the inner surface of the aquarium, it will not be possible to clearly see the fish, accessories, etc. in the aquarium from the outside. Therefore, conventionally, algae, moss, and the like attached to the inner surface of the water tank or the like are removed with a brush or the like at a rate of about once every 1 to 2 weeks, and the removal work is complicated.

  In order to solve the above problems, Japanese Patent Application Laid-Open No. 11-225658 discloses that a photocatalyst layer mainly composed of titanium oxide is formed on the inner surface of a water tank at least on the surface immersed in water, and ultraviolet light. And a water tank using the same are disclosed (see Patent Document 1).

  Japanese Patent Application Laid-Open No. 11-56163 discloses various natural objects installed in contact with water in a water tank, members simulating the same, or the surface of a wall material forming the water tank, etc., or titanium oxide fine particles There is disclosed a biological breeding water tank inner member that forms a layer in which water is dispersed and purifies water by decomposing contaminants such as organic matter in water by its photocatalytic action (see Patent Document 2).

  Japanese Patent Laid-Open No. 2001-95419 discloses a water tank provided with a photocatalytic substance layer in at least a part of the inner surface of the water tank body, and at least the surface of an accessory body such as a block, a plastic molded product, an artificial aquatic plant, etc. An aquarium accessory in which a photocatalytic substance layer is provided in a part of the region, and an aquarium system including these are disclosed (see Patent Document 3).

  In the utility model registration No. 3031029, a purification device comprising a photocatalyst carrying plate and a support member for supporting this at the bottom of the water tank is installed just below the corner of the water tank where the water discharge port of the water circulation device is located. And the purification apparatus of the fish breeding aquarium which purifies the water of a breeding aquarium is disclosed (refer patent document 4).

Japanese Utility Model Registration No. 3051920 discloses an aquarium for aquarium fish that is constructed so that the inner surface of a transparent glass or resin material coated with titanium dioxide is irradiated with ultraviolet rays of fluorescent light or black light. Or the water purification apparatus of the tank of an aquarium is disclosed (refer patent document 5).
JP-A-11-225658 JP-A-11-56163 JP 2001-95419 A Utility Model Registration No. 3031029 Utility Model Registration No. 3051920

However, in the water tank disclosed in Patent Document 1, a photocatalyst layer is formed inside the water tank, but no effective measure is taken for the contact efficiency between the photocatalyst and water.
Oxidative decomposition of inorganic and organic compounds that cause water pollution, bad odor, and other pollutants, and destruction of bacteria and viruses are caused by the action of active oxygen generated on the surface of the photocatalyst layer. However, this reaction occurs only in the water to be treated which is in contact with the surface of the photocatalyst. Therefore, if water is not kept flowing on the surface of the photocatalyst so that new water to be treated always comes into contact with the surface of the photocatalyst layer, the photocatalyst efficiently oxidizes and decomposes the pollutants in the water. Absent.

  Furthermore, even if oxidative decomposition is performed on the causative agent of water pollution and the causative agent of bad odor in this way to destroy bacteria and algae, algae adhere to the inner surface of the tank after a certain period of time. Since it comes, it becomes necessary to rub the surface with a brush and clean it. At this time, the surface of the photocatalyst layer provided on the inner surface of the water tank is partially damaged, and in some cases, a part of the photocatalyst layer may be peeled off or dropped off.

  In the water tank disclosed in Patent Document 2, the same thing can be said for the water tank forming wall material covered with the photocatalyst layer. In addition, even in the case of natural objects that form an ornamental landscape, the photocatalyst layer can be prevented from being damaged, peeled off, dropped off, etc. during cleaning, but the surface of the photocatalyst causes water pollution due to sufficient water flow. It is difficult to expect efficient oxidative degradation of substances.

In the water tank disclosed in Patent Document 3 as well, in the partial region of the inner surface of the water tank body and the surface of the photocatalyst layer provided on at least a part of the surface of the accessory body, the same as in Patent Document 2 above. I can say that.
However, in the water tank disclosed in this publication, a circulation path for circulating water is provided. However, although the efficiency of contact between the photocatalyst layer and water is sufficient, although water circulates, it is difficult to say that water generates a vigorous water flow and contacts the photocatalyst layer.

  In the water tank purification device disclosed in Patent Document 4, since the photocatalyst carrying plate is installed at the bottom of the water tank immediately below the water discharge port of the circulation device, the water in the water tank is efficiently brought into contact with the photocatalyst. Can be made. However, in this water tank, no consideration is given to aesthetics.

  In the water tank disclosed in Patent Document 5, a photocatalyst layer is coated on the inner surface of the wall material of the water tank, and a circulation filtration device is provided. However, the contact efficiency between the photocatalyst layer and water can be said to be the same as that of Patent Document 3 described above, and at the same time, the improvement of the aesthetics in the water tank is not considered at all.

  The present invention has been made in view of the problems of such a conventional aquarium. By efficiently bringing the circulating water in the aquarium into contact with the photocatalyst, the oxidative decomposition of the causative substance of water pollution and the odor-causing substance is achieved. In addition to efficiently controlling the generation of fungi and algae, improving the aesthetics of the aquarium, and also for aquatic animal breeding where the photocatalyst layer is not damaged, peeled off or dropped even during cleaning of the aquarium It aims to provide an aquarium system.

That is, in order to achieve the above object, the present invention has the following configuration.
(1) It has a water tank main body, a back screen disposed on the back side in the water tank, and a circulation device for circulating water in the water tank main body. The water circulation device removes impurities contained in water. An aquatic animal breeding aquarium system comprising a filter tank with a filter-type mounting board for removal and a circulation path for circulating water through the filter tank with a filter-type mounting board, wherein the filter tank with a filter-type mounting board is An aquatic animal breeding aquarium system comprising a filter medium for removing impurities on a lower surface of an attachment board, and a photocatalytic material layer provided on the back screen and the attachment board.
(2) The aquatic animal breeding aquarium system according to (1), wherein the photocatalytic substance layer contains titanium dioxide.

(3) The photocatalytic substance layer is formed by dispersing titanium dioxide particles in a synthetic resin paint and coating the surface of a synthetic resin plate material, according to (1) or (2), Aquatic animal breeding tank system.
(4) The aquatic animal breeding aquarium system according to (3), wherein the synthetic resin paint is a phthalic acid resin paint.
(5) The aquatic animal breeding aquarium system according to (3), wherein the synthetic resin plate material is a polyvinyl chloride resin plate.
(6) The aquarium system for aquatic animal breeding according to (1), wherein the filter tank with a filter-type mounting board is a water tank top-mounted filter tank or a water tank bottom-installed filter tank.

  According to the present invention, the photocatalyst material layer is provided on the surface side of the back screen and the filter type mounting board, and the filter medium for removing impurities is installed on the lower surface of the mounting board. By circulating water, it is possible to remove aquatic animal feces such as fish and uneaten bait and spoilage, as well as water pollution and contamination by the photocatalyst provided on the surface of the filter type mounting board located on the upper surface of the filtration tank. An organic compound or the like that is a cause of malodor can be efficiently removed by oxidative decomposition. Furthermore, the circulating water not only comes into contact with the photocatalyst provided on the surface of the filter type mounting board, but also the circulating water flowing out of the drain pipe of the filtration tank is placed on the back screen surface installed near the drain pipe outlet. The organic compound that flows down and contacts the photocatalyst material tank provided on the surface of the back screen is efficiently oxidized and decomposed, causing water pollution and bad odor.

  In addition, since the back screen is installed inside the aquarium, it is directly illuminated by fluorescent lights for viewing, so the inside of the aquarium is brightened with blue and green colors on the surface, goldfish, etc. This will enhance the appreciation of aesthetics. Furthermore, the filtration tank provided with the back screen and mounting board on the upper surface can be removed from the water tank and cleaned separately when cleaning the water tank. The appearance can be maintained semi-permanently without causing damage such as scratches, peeling and dropping.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the back screen 7 is installed inside the water tank body 3, the filter tank 2 with a filter type mounting board is placed on the top of the water tank body 3 as an upper filter, and the viewing fluorescent lamp 1 is further attached to the water tank body 3. It is a perspective view explaining one Embodiment of this invention arrange | positioned at the upper part. In FIG. 1, 4 is a circulation pump, 5 is a household outlet, and 6 is a water suction pipe. A suction member 8 having a slit is attached to the tip of the water suction pipe in order to prevent suction of aquatic plants and the like. 9 is a watering pump.

  FIG. 2 shows a longitudinal sectional view of the water tank of the water tank system of the present invention shown in FIG. 1 and a filter tank with a filter type mounting board. However, FIG. 2 shows an embodiment of the present invention in which two filter tanks 10 and 10 are installed in one filter tank 2. It should be noted that constituent elements having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments of the present invention. In FIG. 2, 11 is a drain pipe for circulating the filtered water of the filter tank 10 installed in the filter tank 2 to the water tank body 3, and 12 is a filter type mounting board.

  FIG. 3 is a schematic view schematically showing a flow path that returns to the water tank body 3 of the water to be treated supplied from the sprinkling pipe 9 in the filtration tank 2. The water to be treated passes from the sprinkling pipe 9 to the filter mounting board 12 shown in FIG. 2, the filter layer 10 made of a filter of the loofah-like solid network provided below, and reaches the bottom of the filtration tank 2. It flows into the partition space 25 formed by this partition wall 24 and the wall for the other end of the filtration tank 2 through the partition wall 24 provided with the slit at the bottom portion provided at the end portion without the sprinkling pipe 9, Filtered and purified water is discharged into the water tank body 3 through the top of the drain pipe 11 set at a position lower than the top of the filter layer 10 by water pressure. The drain pipe 11 is provided with an elbow below the filtration tank 2, the discharge port is directed to the back screen 7, and the filtered and purified water flows down along the surface of the back screen 7. In order to enhance the purification action by the photocatalyst described above, it is preferable.

In addition, this drainage system demonstrates one Embodiment of this invention, Comprising: What kind of filtration is used in the filtration tank of the system employ | adopted as an upper filter in the tank for breeding aquatic animals, such as fish It goes without saying that any drainage system can be used without any restrictions.
For example, as shown in FIG. 4, when placing the filtration tank 2 on the upper part of the main body 3, in order to place the filtration tank 2, in the case of a large water tank, a pedestal is often used. You may make it accommodate the filtration tank 2 in the container-type mount 26 which raised the side wall of this mount. The water to be treated passes from the sprinkling pipe 9 through the filter mounting board 12 shown in FIG. 2 and the filter layer 10 provided thereunder to the bottom of the filtration tank 2, and a slit is formed at the bottom provided in the filtration tank 2. After passing through the cylindrical body 13, it passes through the space between the drain pipe 11 provided at the bottom of the container-type mount 26 corresponding to the inside of the cylindrical body, and is set at a position lower than the top of the cylindrical body 13 by water pressure. Through the top of the drain pipe 11, filtered and purified water is discharged into the aquarium body 3. Needless to say, the drain pipe 11 is preferably devised so that the discharge port applies the discharged water to the back screen 7 by an elbow as in the case of FIG. Needless to say, the top of the cylindrical body 13 is covered with a lid so that wastewater from the end treatment does not flow.

  The aquarium system described with reference to FIGS. 1 to 4 described above is that the filtration tank 2 with a filter-type mounting board is a water tank upper placement filtration tank, but the aquarium system of the present invention is shown in FIG. It goes without saying that a water tank bottom-installed filtration tank 2 as shown in FIG.

Next, the structure and action mechanism of the aquarium system using the aquarium upper-mounted filtration tank called the upper filter shown in FIGS. 1 to 4 will be described in detail.
In FIG. 1, the illustrated aquarium includes a rectangular parallelepiped aquarium body 3, and the aquarium body 3 includes a bottom wall 17 and four side walls 18 extending substantially vertically upward from four sides of the bottom wall 17 (two side walls in FIG. 1). The upper surface is open. The bottom wall 17 and the four side walls 18 are made of transparent glass or plastic (for example, acrylic resin).

  A viewing fluorescent lamp 1 for irradiating the inside of the water tank body 3 is disposed above the upper surface of the water tank body 3. In the illustrated fluorescent lamp 1, a fluorescent lamp 1 as an irradiation lamp is mounted in an illumination box mounted on the upper surface of the water tank body 3. A power cord extends from the lighting box, and the power cord is electrically connected to a power source, for example, a household outlet 5 via a control timer (not shown). Therefore, lighting and extinguishing of the fluorescent lamp 1 are controlled by the control timer, and when it is lit, the inside of the water tank body 3 is irradiated.

  An appropriate amount of water is placed in such a water tank body 3, and the water surface reaches near the upper surface of the water tank body 3 and is filled with water until it is almost full. In the aquarium body 3, ornamental fish such as goldfish and tropical fish are released. The configuration described above is the same as that of the prior art, and the following improvements are made in the present invention. First, a back screen 7 provided with a layer of a photocatalytic material substantially over the entire front surface is adsorbed and installed on the side wall 18 in front of the rear side wall 18 of the water tank body 3. In addition, the attachment to the side wall 18 of the back screen 7 is not necessarily limited to the adsorption method, and any detachable method that can be easily removed from the side wall at the time of brush cleaning for removing and cleaning algae from the inner wall of the water tank. Even a simple mounting method can be adopted without any particular limitation.

  As shown in FIG. 2, the second improvement is that a filter-type mounting board 12 provided with a large number of water passage holes 22 is provided on the filter layer 10 on the upper surface of the water tank upper mounting type filtration tank 2 as an upper filter. It has been placed. And, like the back screen 7, a layer of a photocatalytic substance is provided on the entire surface of the filter type mounting board 12. Further, the filter layer 10 has a fine filter such as polypropylene (PP) wool in order from the top under the filter type mounting board 12, and then a recycled glass ball (recycled spherical product of light glass sold for flower pots). ). Then, for convenience in taking them out and storing them again during cleaning to clean them, they are wrapped in a mesh fabric or net of non-water-absorbing synthetic fibers having a mesh smaller than the diameter of the crow ball. However, the filter layer 10 is not limited to the above-described configuration, and is a loofah shape obtained by three-dimensionally entangled and fused a synthetic fiber monofilament that is used for circulating filtration of water in a fish pond. As long as it can be used without the need for cleaning for a relatively long period of time, such as a three-dimensional network, it can be employed without any particular limitation.

  1 to 4, the illustrated water tank system includes a water tank 3 and a water circulation device for circulating the water in the water tank body 3. The water circulation device has a filtration layer 3 and a circulation pump (water absorption motor) 4. As described above, the filtration tank 2 includes the filter-type mounting board 12 and the filter layer 10, and the drainage pipe 9 configured as described above is attached to the filtration tank 2. The filter medium constituting the filter layer 10 is to remove impurities such as excrement of aquatic animals such as fish, uneaten bait, and other garbage.

  On the other hand, a water suction pipe 6 is connected to the lower part of the circulation pump 4, and the tip of the water suction pipe 6 is inserted into the bottom of the water filled in the water tank body 3. Note that a suction member 8 having a slit is attached to the tip of the water suction pipe 6 in order to prevent suction of aquatic plants and the like. Further, a watering pipe 9 is connected to the filtration tank 2 side of the circulation pump, and water is sprinkled on the filter type mounting board 12 installed on the upper surface of the filtration tank 2, and a large number of water flows provided on the mounting board 12. The hole 22 passes through the filter layer 10, passes between the tubular body 13 and the drain pipe 11 by water pressure, and extends from the drain port of the drain pipe 11 to the bottom of the water tank body 3 along the surface of the back screen 7. Flow down.

  The circulation pump 4 is provided with a power cord, and this power cord is connected to, for example, a household outlet 5. When the circulation pump 4 is activated, the water in the water tank 3 is sucked through the suction pipe 6 and returned to the water tank 3 through the sprinkling pipe 9 and then through the filtration tank 2 and then the drainage pipe 11, thus circulating. Configure the route.

  In this water tank system, a photocatalyst material layer is formed on substantially the entire surface of the filter-type mounting board 12 on the upper surface of the back screen 7 and the filtration tank 2. Note that the photocatalytic substance layer formed on the surface of the back screen 7 does not necessarily have to be formed on the entire surface of the back screen 7, and may be formed only on a portion immersed in water. The water sprayed from the sprinkling pipe 9 to the filter-type mounting board 12 is caused by water pollution and bad odor contained in the water by a photocatalyst such as titanium dioxide in the photocatalytic substance layer formed on the surface of the filter-type mounting board 12. It is cleaned by oxidative decomposition of inorganic and organic compounds, which are causative substances, and destruction of bacteria and viruses.

  On the other hand, the water that passes through the filtration tank 2 and removes causative substances such as aquatic animal feces and remaining bait and returns to the water tank from the drainage pipe 11 reaches the tank bottom along the surface of the back screen 7. In the meantime, similarly to the filter type mounting pod 12, the photocatalyst such as titanium dioxide in the photocatalyst material layer formed on the surface of the back screen 7 is further cleaned by the same mechanism as described above. At this time, the back screen 7 is illuminated by the fluorescent lamp 1 for viewing arranged above the water tank 3 and is brightly illuminated with the activation of the photocatalyst, not only brightening the inside of the water tank, but also a refreshing sensation with blue to green colors. And enhance the appreciation value of goldfish and other appreciation fish.

  In addition to the above effects, in the aquarium system of the present invention, the total amount of water sucked up by the pump 4 can be directly sprinkled on the photocatalyst material layer of the filter-type mounting board 12 and brought into contact with the photocatalyst in a short time. In the process of returning to the aquarium 3, it is again brought into contact with the photocatalytic substance layer of the back screen 7, so that the causative substances of water pollution and odor are sufficiently removed, and as a result, the generation of algae and moss is maximized. Can be suppressed.

  In the above, it is a detail about the water tank system for water tank upper placement type filtration tank type aquatic animal breeding called the upper filter which provided filter type mounting board 12 on filter layer 10 of filtration tank 3 based on Drawing 1-Drawing 4 However, an embodiment using a water tank bottom-installed filtration tank will be described below with reference to FIG.

  FIG. 5 is a perspective view schematically showing the aquarium system of the second embodiment with a part thereof omitted. 4, the illustrated aquarium system includes a water tank 3, a water circulation device 14 for circulating water in the water tank 3 in the water tank 3, and an air supply means 15 for supplying air to the water in the water tank 3. I have. The water circulation device 14 includes the filtration tank 2 and a circulation pipe 16. The filtration tank 2 includes a filter-type mounting board 12 installed on the uppermost surface thereof, and the mounting board 12 is provided with a number of water absorption holes 22 for sucking water. The mounting board 12 is installed at a distance from the bottom wall 17 of the water tank body 3, and a filter layer 10 including a filter medium is disposed between the bottom wall 17 and the filter-type mounting board 12, and the filtration tank. 2 is constituted. The circulation pipe 16 is used to circulate water purified by the filter medium of the filter layer 10, and one end (lower end) of the circulation pipe 16 is connected to the circulation pipe 16 in the space between the bottom wall 17 and the filtration tank 2. The other end (upper end) protrudes somewhat upward from the water surface in the water tank 3. The gravel 23 and the like are spread around the mounting board 12, and the water in the water tank 3 is circulated through the water absorption holes 22 of the mounting board 12 on which the gravel 23 is not placed and the filter medium 10. And the filter type mounting board 12 is comprised so that light may always be irradiated.

  The air supply means 15 includes an air pump 19, and this air pump 19 is placed on a lid 20 that covers the upper surface of the water tank body 3, for example. An air hose 21 extends from the air pump 19, and the tip of the air hose 21 is positioned below one end of the circulation pipe 16. Therefore, when the air pump 19 is operated, ambient air is sucked, the sucked air is discharged below the other end of the circulation pipe 16 through the air hose 21, and air is supplied into the water. The supplied air floats in the circulation pipe 16, and the water in the pipe 16 is pushed up by the foam levitation force. The pushed-up water flows from the upper end of the circulation pipe 16 to the water tank body 3. In this way, the air is circulated in the water tank 3 by using the levitation force of the air supplied by the air pump 19 without using a dedicated circulation pump.

  In this embodiment, the back screen is not shown in order to simplify the explanation, but in order to enhance the photocatalytic effect and to enhance the ornamental beauty, it is installed in the same manner as the upper filter described above. Needless to say, you have to. Furthermore, it goes without saying that the position of the upper end of the circulation pipe 16 needs to be provided at a position where the water discharged together with the foam can contact the back screen surface as efficiently as possible. In addition, the lid 20 is applied only to a part of the water tank body 3 so that the light of the viewing fluorescent lamp 1 can always irradiate the photocatalyst material layer formed on the surface of the filter type mounting board 12 installed on the tank bottom. It is necessary to consider such as mounting or using a light-transmitting material such as a transparent plastic plate.

  In the description based on the above drawings, the configuration and action mechanism of the aquatic animal breeding aquarium system of the present invention have been described in detail. The raw materials for forming the photocatalytic substance layer which is the main member according to the present invention are described below. The formation method, the photocatalytic action, etc. will be described sequentially.

  It is known that a photocatalyst is excited by irradiation with ultraviolet rays or the like to generate holes and electrons, and as a result, causes oxidation and reduction reactions by hydroxyrazyl and superoxide anions. As described above, the application to the purification of aquatic tanks for aquatic animals such as fish has been put to practical use by utilizing the oxidation and decomposition of organic substances by this reaction.

By the way, examples of the photocatalytic substance include TiO ₂ , ZnO, SrTiO ₃ , Fe ₂ O ₃ , WO ₃ , NiO, SnO ₂ , SiO ₂ , Cu ₂ O, Bi ₂ O ₃ , and CeO. For the purpose of expansion to the visible light region and other improvements, photocatalytic substances carrying metals and metal oxides such as Pt, Rh, RuO, Nb, Cu, Sn, NiO and the like are known, and the present invention provides these The photocatalytic substance can be used without any limitation. However, in the present invention, titanium dioxide is a particularly preferred photocatalyst from the viewpoint of the safety of humans who manage fish and aquariums.

As the titanium dioxide for photocatalyst, an anatase type which is easily activated by ultraviolet rays is preferable, and the purification action is remarkably promoted even by a slight ultraviolet ray irradiation.
In the present invention, the photocatalytic substance is mixed with a coating material and applied to a back screen or a filter-type mounting board to form a photocatalytic substance layer on the surface of the plate material.

  Examples of the resin component of the paint include phthalic acid resin, alkyd resin, amino resin, phenol resin, acrylic resin, epoxy resin, urethane resin, urea resin, and silicon resin. Among them, a phthalic acid resin capable of producing alkyd resin coatings for room temperature drying and heat drying by freely using modification means such as carboxylic acid modification, resin acid modification, and fatty acid modification is a resin component used in the present invention. Particularly preferred resin components.

  That is, it is preferable to use a modified phthalic resin as the resin component of the paint used in the present invention. Furthermore, among these modified phthalic resins, it is preferable to use modified phthalic resins having a long oil length. This is because it is conceivable that the paint using the modified phthalic acid resin having a long oil length improves the affinity with the particles. This affinity affects the hue of the painted back screen, and those with a high affinity are excellent in the redispersion action that dissolves the aggregation of the pigment particles in the colored layer, so that the resulting colored object is more vivid. It has a color tone. Therefore, the modified phthalic acid resin used in the present invention is preferably a modified phthalic acid resin having an oil length of 40% or more, preferably 50% or more, particularly preferably 60% or more.

  Examples of the modifying agent used in the modified phthalic acid resin include drying oil, semi-drying oil, non-drying oil or fatty acid thereof, natural resin, synthetic resin, etc. In the present invention, oil or fatty acid thereof. Modified phthalic acid resin is preferred, specifically linseed oil modified phthalic acid resin, soybean oil modified phthalic acid resin, dehydrated castor oil modified phthalic acid resin, castor oil modified phthalic acid resin, coconut oil modified phthalic acid resin, styrenated oil Examples thereof include modified phthalic acid resins.

As a coloring material for paint, an organic pigment is more preferable than an organic pigment because an organic pigment may cause deterioration such as discoloration and alteration due to the action of a photocatalyst.
And as a paint color of the back screen which has the effect of enhancing the appreciation effect of goldfish etc. by the illumination of the fluorescent lamp, blue or green is a preferable color.
Examples thereof include green pigments such as chromium oxide, titanium cobalt green, cobalt green, and cobalt chrome green: inorganic pigments such as blue pigments such as ultramarine blue, bitumen, cobalt blue, cobalt silica blue, and cobalt zinc silica blue. The ratio of these colored pigments blended in the colored pigment of the present invention is not particularly limited, and can be appropriately selected and adjusted according to desired color (lightness, chromaticity, saturation).

  Add the above-mentioned photocatalyst substance, colored pigment, paint further blended with additives such as pigment and photocatalyst dispersant, spray coating method, dip coating method, flow coating method on the surface of back screen and filter type mounting board, A photocatalytic substance layer is formed by applying by spin coating or roll coating. Next, this is fixed to the surface of a plate material such as a back screen by room temperature drying or heat drying treatment. In the case of the back screen, it is not necessary to cover the entire surface, but only the portion immersed in water.

  Any material can be used as the material for the back screen and the filter-type mounting board as long as it is a plastic plate with some flexibility, but polychlorinated from the standpoint of adhesion strength and cost of the paint. It is preferable that it is a vinyl (PVC) board, and it is preferable that the thickness of a board | plate material is about 2 mm. The thickness of the photocatalytic substance layer (paint layer) is preferably about 0.5 mm from the viewpoint of scratch resistance and cost.

By the way, in addition to inorganic and organic pollution source substances in water, there are malodor-causing substances and algae and moss as objects to be treated by the photocatalyst.
Examples of malodorous substances include ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, trimethylamine, acetaldehyde, styrene, dimethyl sulfide and the like.
Representative algae include, for example, green algae. Green algae have the simplest structure among green plants, and are a group of green algae with chloroplasts containing a large amount of chlorophyll. Green algae include various plants such as single cell (Chlorella, Tsutsumimo, Mikazukimo), filamentous (Aomidoro, Hoshimidro), colony (Volbox), multicellular (Aoza, Kawanori). Usually, it is a filamentous green algae such as Aomidro that is generated in large quantities in the water tank.

  In the present invention, all the water in the water tank is sprinkled by a sprinkling pipe on the entire surface of the filter type mounting board having the photocatalytic material layer formed as described above, and contains the above water pollution source material and malodor source material. The water to be contacted with the photocatalyst substance as a thin layered water stream is contacted in the presence of oxygen with the photocatalyst excited by ultraviolet rays or the like, and is efficiently oxidatively decomposed and removed. And the drainage water removed by the filter material provided on the lower surface of the filter-type mounting board, such as fish excrement and remnants, diffuses to the bottom of the tank along the back screen installed near the outlet of the drainage pipe, It undergoes oxidative degradation by the same photocatalyst while flowing to remove organic compounds, odor source substances, bacteria, and viruses as water pollution sources, and at the same time, it becomes clean water in which the generation of algae is greatly suppressed.

As a result, the water in front of the back screen becomes transparent, and the light of the fluorescent lamp for viewing shines brightly on the back screen, and the aquarium is bright and refreshing, enhancing the appreciation value of goldfish and the like.
Further, the back screen can be easily removed from the water tank when cleaning the water tank, and the water tank can be easily cleaned, and the photocatalytic material layer on the surface of the back screen is not damaged, and can be used semi-permanently.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited only to this Example.

Example 1 and Comparative Examples 1-3
Sky blue color oily synthetic resin paint for tin paint made by Dainippon Paint Co., Ltd. (resin component is specially modified phthalate resin varnish) 1: Titanium dioxide sol on a vinyl chloride plate with a thickness of 2 mm × width 910 mm × length 1820 mm 2 the paint solvent mixture was added 10 wt% in a mixture of (by weight), using a spray gun quickly nozzle diameter 2.0 mm, 1 single spray coating with an air pressure of 0.3 kgf / cm ² In the semi-dry state after standing for 1 hour at room temperature, the second spray coating is performed in the same manner, and after drying for 24 hours at room temperature, it is cut into a predetermined size by a cutting machine to produce a filter type mounting board and a back screen. did. The coating amount of the above solvent-diluted blended paint per m ^{2 of the} vinyl chloride plate was 498.2 cc. The filter-type mounting board is provided with water passage holes (water absorption holes) having a diameter of 3 mm at intervals of 2 cm vertically and horizontally.

  The filtration tank shown in FIG. 3 was placed in an acrylic plate water tank having dimensions of 240 × 180 × 170 mm, 5 liters of water was added, and the test was performed under the conditions shown in Table 1 below.

註１）フィルタは水槽内投入用の市販の小型フィルタである。
２）フィルタ式取付ボードは上部フィルタ（ろ過槽）の最上面に載置した。
３）金魚は小型の和金を３匹づつ飼育した。
４）全ての金魚の状態：特に異常（病気）なし。
５）光エネルギーは室内における太陽光、又は室内の間接的蛍光灯のエネルギーである。

註 1) The filter is a commercially available small filter for charging into the water tank.
2) The filter type mounting board was placed on the uppermost surface of the upper filter (filtration tank).
3) Goldfish were bred by three small Japanese golds.
4) All goldfish conditions: No abnormalities (diseases).
5) Light energy is sunlight in a room or energy of an indirect fluorescent lamp in the room.

  From the experimental results shown in Table 1, the combined use of the back screen and filter type mounting board of Example 1 decomposes water pollutants most efficiently compared to any of Comparative Examples 1 to 3, and has excellent deodorizing performance. In addition, it has been found that the generation of algae and moss can be suppressed to the maximum, the need for changing water is eliminated, the inside of the aquarium is bright and beautiful, and the value of goldfish is enhanced.

Example 2
Using a water tank made of glass plate with a size of 900 × 450 × 450 mm (water volume: about 170 liters), the filtration tank shown in FIG. 4 is placed and various goldfishes (Netherlands, Ranchu, Masterpiece, Tokinki, Eight blue fishes were bred and tested in the same manner as described above, but almost the same results were obtained.

  In the aquarium system for aquatic animal breeding of the present invention, by using a back screen having a photocatalyst material layer on the surface and a filter-type mounting board in combination, an extremely excellent water purification effect, deodorizing effect and algae generation suppressing effect are obtained. Therefore, it can be expected to be used as an aquarium system for breeding appreciation fish such as goldfish, tropical fish and river fish.

It is a perspective view explaining one embodiment of the present invention which used together a back screen and an upper filter (filter tank) with a filter type attachment board. It is a longitudinal cross-sectional view of the aquarium system of the present invention shown in FIG. It is a schematic explanatory drawing which shows typically the flow path of the water in the filtration tank shown in FIG.1 and FIG.2. It is a schematic explanatory drawing which shows typically the flow path of the water in the filtration tank accommodated in the container type mount frame. It is a perspective view explaining another embodiment of this invention which used together the back screen (illustration omitted) and the water tank bottom installation type filtration tank with a filter type attachment board.

Explanation of symbols

1 Fluorescent lamp for viewing 2 Filtration tank 3 Water tank body 4 Pump (water absorption motor)
DESCRIPTION OF SYMBOLS 5 Outlet 6 Water pick-up pipe 7 Back screen 8 Suction member 9 Sprinkling pipe 10 Filter layer 11 Drain pipe 12 Filter type mounting board 13 Cylindrical body 14 Water circulation device 15 Air supply means 16 Circulation pipe 17 Bottom wall of water tank 18 Side wall 19 Air pump 20 Lid 21 Air hose 22 Water absorption hole (water passage hole)
23 Gravel 24 Partition wall 25 Partition space 26 Container stand

Claims (6)

It has a water tank body, a back screen arranged on the back side in the water tank, and a circulation device for circulating the water in the water tank body, and this water circulation device is for removing impurities contained in water. In an aquarium system for aquatic animal breeding comprising a filter tank with a filter type mounting board and a circulation path for circulating water through the filter tank with a filter type mounting board,
The filtration tank with a filter-type mounting board has a filter medium for removing impurities on the lower surface of the mounting board, and is provided with a photocatalyst material layer on the surface of the back screen and the mounting board. system.   The aquatic animal breeding aquarium system according to claim 1, wherein the photocatalytic substance layer contains titanium dioxide.   The aquatic animal breeding aquarium system according to claim 1 or 2, wherein the photocatalytic substance layer is formed by dispersing titanium dioxide particles in a synthetic resin paint and coating the surface of a synthetic resin plate. .   The aquatic animal breeding aquarium system according to claim 3, wherein the synthetic resin paint is a phthalic acid resin paint.   The aquatic animal breeding aquarium system according to claim 3, wherein the synthetic resin plate material is a polyvinyl chloride resin plate.   The aquarium system for aquatic animal breeding according to claim 1, wherein the filter tank with a filter type mounting board is a water tank top-mounted filter tank or a tank tank bottom-installed filter tank.

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