JP3806008B2 - Oxygenator for ornamental fish tank and portable oxygenator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oxygen replenisher for supplying a gas such as oxygen into water such as an aquarium for aquarium fish and a live fish cage. In addition , the present invention relates to a portable oxygen supplementer used for carrying and transporting live fish and live bait for fishing.
[0002]
[Prior art]
Conventionally, air pumps, oxygen cylinders, oxygen generators, etc. have been used mainly as methods for supplying oxygen into aquariums for aquarium fish, live fish cages, etc. Is also widely used because of its ease of use.
[0003]
[Problems to be solved by the invention]
However, most of In air pump, uses the power as a driving source, its use is to be done continuously day and night, from the viewpoint of energy saving, those requiring consideration. Moreover, it is common to stop an oxygen supply function at the time of a power failure , and the unexpected situation is also assumed. Further, most of the air pumps have a structure in which the plate is oscillated by an electromagnet or a motor to send air, so that an operation sound is generated, and it is against the ear when it is quiet at night.
[0004]
[Means for Solving the Problems]
The ornamental fish tank oxygen replenisher according to claim 1 includes a gas permeation part and a gas storage part, and the structure may be integrated by providing a fitting part. ) Etc., but the gas storage part is filled in a pressurized state using a gas permeable material in the gas permeation part and a gas permeable film formed by forming a craze on the polymer resin film. The amount of permeated gas is controlled. Supplemental oxygen unit of the compressed air that is filled in the gas storage portion, the voids (fine hole) constituting the craze generated in the film is restricted to permeation amount of a gas, fine bubbles of air bubbles tends to stagnate in water Gas nutrients such as oxygen occupying 20% of the air and 0.2% carbon dioxide are efficiently mixed or fused into the water in a state of about 50 μm. In addition, the permeation amount is limited and the amount of gas ejection is suppressed, so that it is possible to continuously supply oxygen for a long time, and filling the gas storage unit with compressed air without interruption. It is not necessary, and it is performed once as needed.
[0005]
As a method of filling the gas storage part with compressed air, a method of generating compressed air in the gas storage part by forcibly injecting a gas such as air using an air pump, an air pump or the like. A method of instantaneously filling compressed air generated using an air compressor or the like. For example, a method of supplying compressed oxygen or the like to the gas storage unit using a commercially available compression cylinder may be used. In addition, stable compressed air can be stored by performing instantaneous and instantaneous filling using an air compressor (air compressor) activated by a pressure sensor, a timer, or the like as necessary. In this case, the gas permeation amount and permeation state can be specified by adjusting the compression ratio of the air to be filled.
[0007]
The oxygen storage device according to claim 2, wherein the oxygen storage device is provided with portability by externally providing a mechanism such as an air pump and an air pump in the gas storage section of the oxygen supply device and integrating the mechanism with the oxygen supply device. The oxygen replenisher for ornamental fish tanks according to claim 1 is characterized in that the gas storage part of the oxygen replenisher is externally provided with a mechanism such as an air pump or an air pump so as to be integrated with the oxygen replenisher. The oxygenator for an ornamental fish tank described in 1 is provided with portability. Air supply such as compressed oxygen to the gas storage unit is mainly performed as needed using an externally installed air pump integrated with the oxygen replenisher, an air pump, etc., but an air compressor (air compressor) etc. A method of instantaneously filling the compressed air generated by using this method. A method of supplying compressed oxygen or the like to a gas storage unit using a commercially available compression cylinder is also used depending on the situation. In this case, after filling the compressed air, by forming a separate form by removing the air supply tube from a gas inlet provided in the gas storage portion, These methods can impair the portability of the supplemental oxygen unit There is nothing. As a form of use, the gas permeation part is disposed in water such as a fish tank for live fish transportation, a live bait container for fishing, etc., and compressed air is generated in the gas storage part using an air pump or the like to supply oxygen into the water. The replenishment of the compressed air is appropriately performed according to the decrease.
[0008]
【Example】
Hereinafter, embodiments will be shown and the present invention will be described in more detail. Of course, the present invention is not limited to the following embodiments. In the present invention, a breathable film formed by forming a craze on a polymer resin film (hereinafter referred to as a craze-generating breathable film) is used as a gas permeable material in a gas permeable portion . As shown in FIG. 1, the oxygenator for the aquarium fish tank is installed in the aquarium 6 for aquarium fish through the air supply tube 4 with the air compressed by the air compressor (air compressor) 2. The gas storage part of the oxygen replenisher 8 is instantaneously filled, and fine bubbles are gradually ejected from the gas permeation part of the oxygen replenisher to replenish oxygen in the water tank.
[0009]
More specifically, as shown in FIG. 2 as one embodiment of the usage pattern, air compressed by an air compressor (air compressor) is instantaneously supplied to the side surface of the oxygen replenisher 8 through an air supply tube. for filling, a gas inlet 12 is provided above the supplemental oxygen unit 8, is used as the gas permeable material to the gas transmission portion, the opening portion 14 is provided for craze generation breathable film is attached ing. A fitting portion 10 is provided in the opening 14 and the fixed frame 18, and a craze generating breathable film 16 whose periphery is hardened or whose shape is maintained with plastic, rubber or the like is mounted together with the packing 20.
[0010]
The gas permeation of oxygen supply apparatus, the craze generation breathable film, by mounting a gas permeable material, the compressed air is filled in the gas storage portion of the supplemental oxygen unit varies depending on the type of resin used, the oxygen and The gas permeability of nitrogen gas is generally within the range of 0.3 to 100,000 × 10 ⁴ cm ³ / m ² · 24 hr · atm, and gradually in the form of fine bubbles (about 50 μm) through the craze-generating breathable film. It is ejected and oxygen is replenished efficiently.
[0011]
As described above, the oxygen replenisher of the present invention has the first feature of performing oxygen replenishment over a long period of time by using the craze-generating breathable film as a gas permeable material. It is particularly necessary to fill with compressed air. Therefore, although compressed air is generated using an air compressor (air compressor) , an air pump, an air pump, or the like that can generate compressed air may be used.
[0012]
There are many types of gas inlets that are generally commercially available depending on the intended use, and are not particularly limited. The material should be fish-friendly, such as plastic and urethane resin, and it must be able to prevent the backflow of compressed air using a check valve.
[0013]
The craze generating breathable film attached to the gas permeable portion as a gas permeable material allows a gas such as air to pass through in a slightly pressurized state by generating a craze region in the polymer resin film. The gel-like solution is not allowed to pass through.
[0014]
The polymer resin used as the material of the polymer resin film can be formed into a film or a sheet, such as polyolefin, polyester, polyamide, styrene resin, polycarbonate, halogen-containing thermoplastic resin, nitrile resin, etc. A thermoplastic resin can be mentioned.
[0015]
The polyolefin is an α-olefin homopolymer or a copolymer with another α-olefin and / or α-olefin as a main component and another ethylenically unsaturated monomer. Here, the copolymer may be a block, random, graft or the like or a composite thereof. Examples of the ethylenically unsaturated monomer include unsaturated carboxylic acids or anhydrides such as methacrylic acid, methyl methacrylate, and maleic acid.
[0016]
Specific examples of useful polyolefins include low density branched polyethylene, high density linear polyethylene, low density linear polyethylene, isotactic polypropylene, syndiotactic polypropylene, poly (1-butene), poly (4-methyl-1 -Pentene) and the like.
[0017]
Polyamide is a condensation product containing, as an essential component, a repeating unit having an aromatic or / and aliphatic amide group. Useful polyamides include nylon-4, nylon-6, nylon-6,6, nylon-4,6, nylon-12, amorphous nylon and the like. Among these, preferred polyamides are nylon-6, nylon-6,6, and amorphous nylon.
[0018]
Examples of the polyester include, for example, a thermoplastic polyester produced by condensing a dicarboxylic acid or a lower alkyl ester thereof, an acid halide or an acid anhydride derivative, and a glycol or a dihydric phenol according to an ordinary method. Can do. Among these polyesters, it is preferable to use saturated polyesters, particularly polyethylene terephthalate, polybutylene terephthalate, and polynaphthalene terephthalate.
[0019]
The styrene resin is a polymer of a vinyl aromatic compound, and specific examples of the vinyl aromatic compound include styrene, α-methylstyrene, paramethylstyrene, vinyl toluene, vinyl xylene, and the like. Styrenic resins are homopolymers and copolymers of these vinyl aromatic compounds. Among these, polystyrene is preferable, and rubber graft polystyrene (HIPS) and acrylonitrile / butadiene / styrene copolymer are preferably used.
[0020]
Examples of the polycarbonate include aromatic polycarbonate, aliphatic polycarbonate, and aliphatic / aromatic polycarbonate. Among these, aromatic polycarbonates composed of 2,2-bis (4-oxyphenyl) alkane, bis (4-oxyphenyl) ether, bis (4-oxyphenyl) sulfone, sulfide or sulfoxide bisphenols are used. It is preferable to use it.
[0021]
Examples of the halogen-containing thermoplastic resin include homopolymers and copolymers such as tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, vinylidene fluoride, and vinyl fluoride. In addition, homopolymers and copolymers derived from vinylidene chloride can be mentioned. Among these, preferable halogen-containing thermoplastic resins include homopolymers of polyvinylidene fluoride, copolymers with tetrafluoroethylene, hexafluoropropylene, and chlorotrifluoroethylene, and vinylidene chloride.
[0022]
The nitrile resin contains 50% by weight or more of α, β-olefin type unsaturated mononitrile . Among these unsaturated mononitriles, it is preferable to use acrylonitrile and methacrylonitrile and mixtures thereof.
[0023]
Among the thermoplastic resins, polyolefin, polyester, styrene resin, and halogen-containing thermoplastic resin are preferably used from the viewpoint of moldability to a film or sheet and economical efficiency. These thermoplastic resins may be used alone, combined and used as a composition, or may be blended with another polymer resin, and two or more types of resins may be multilayered. It may be used.
[0024]
In view of the ease of formation of crazes, it is desirable to use a resin having a glass transition temperature of −45 ° C. or higher, preferably −30 ° C. or higher, particularly preferably −15 ° C. or higher. When used as a composition or in a multilayered form, it is preferable that the glass transition temperature of the thermoplastic resin, which is the main component, is within the above range. In the case of a thermoplastic resin exhibiting a glass transition temperature lower than this, it is difficult to efficiently form a craze because it is too flexible.
[0025]
The polymer resin film or sheet obtained by using the thermoplastic resin is not particularly limited in its production method, and can be obtained by applying various molding methods. Those obtained by applying a die extrusion molding method or a blow-up inflation molding method are industrially advantageous.
[0026]
The thickness of the polymer resin film is generally 0.5 to 1,000 μm, preferably 1 to 800 μm, particularly preferably 2 to 500 μm.
[0027]
The polymer resin film has a molecular orientation degree with a birefringence of 0.5 × 10 ⁻³ or more, preferably 1 × 10 ⁻³ or more, and particularly preferably 1.5 × 10 ⁻³ or more. It is effective to generate In a film having a molecular orientation whose birefringence is out of the above range, it is difficult to easily produce a desired craze . The degree of orientation refers to the resin structure, the take-up speed, the cooling speed, the molecular weight of the resin, the molecular weight distribution, the tacticity, and other molecular structures at the time of forming the film. If there is, the film can be controlled by changing the blow-up ratio and the like, and thus a film having an orientation degree in a desired preferable range can be produced by appropriately controlling these.
[0028]
The birefringence referred to here is expressed as a difference between the main refractive indexes. For example, the difference (n1−n2) between the refractive index (n1) in the film forming direction and the refractive index (n2) in the direction perpendicular thereto. ) And is one of the indexes expressing the degree of molecular orientation. In practice, these birefringences can be measured by using a polarizing microscope and a compensator. The larger this value, the greater the anisotropy, and the more likely it is to cause crazing.
[0029]
The craze of the craze-generating breathable film used in the present invention is basically of a width of generally 0.5 to 100 μm, preferably 1 to 50 μm, substantially parallel to the molecular orientation direction of the polymer resin film. . The striped craze needs to have a ratio of the number of crazes penetrating in the thickness direction of the film to 10% or more, preferably 20% or more, particularly preferably 40% or more with respect to the total number of crazes. If the ratio is less than the above range, sufficient air permeability cannot be obtained.
[0030]
Is to generate in a direction substantially parallel to the direction of molecular orientation of craze, craze is generated by pulling in a direction at right angles with the direction of orientation of the molecular chains, generate craze in direction at right angles with the orientation of the molecular chains Because it is difficult to do. The craze mentioned here includes a surface craze appearing on the surface of the polymer resin film and an internal craze generated inside, and refers to a region having a fine crack-like pattern. This craze is composed of molecular bundles (fibrils) and microvoids, and the gas permeability of various gases is generated in this portion.
[0031]
The above-described crazing-generating breathable film varies depending on the type of resin used. For example, when a homopolymer of polyvinylidene fluoride is used, the gas permeability of oxygen and nitrogen gas is generally 0.3 to 100,000. × 10 ⁴ cm ³ / m ² · 24 hr · atm. The moisture permeability is generally 10 to 100,000 × 10 ⁴ g / m ² · 24 hr. The tensile strength is generally 50 to 500 kg / cm ² , preferably 60 to 500 kg / cm ² , particularly preferably 75 to 500 kg / cm ² .
[0032]
The craze produced | generated to a polymer resin film is generally 0.1-1,000 micrometers, Preferably it is the quantity of the grade which can be recognized as a striped area | region, formed in the space | interval of 1-800 micrometers.
[0033]
Since the craze-generating breathable film used in the present invention has the above-mentioned striped craze, it has a function of breathability and moisture permeability , and its mechanism is striped as shown in FIG. The craze 22 generated in this way penetrates in the thickness direction of the film or sheet , and the gas 24 such as oxygen or nitrogen diffuses and passes through the craze zone, thereby exhibiting air permeability.
[0034]
The degree of air permeability of the craze-generating air-permeable film can be adjusted by changing the width of the craze generated in the polymer resin film, the distance between the crazes, and the ratio of the number of crazes penetrated. Specifically, by adjusting the degree of molecular orientation of the polymer resin film, the temperature at which crazes are generated , the tension of the polymer resin film (tension in the tension state), the bending angle of the film, etc. Breathability can be controlled and a breathable film can be provided according to the intended use.
[0035]
For example, increasing the tension when generating crazes or reducing the folding angle decreases the spacing between the generated crazes and increases the percentage of the number of crazes penetrated, resulting in increased breathability. . The craze generation breathable film adjusted by changing the width of the craze, the distance between the crazes, and the ratio of the craze penetrated, controls the gas permeability, moisture permeability, tensile strength, etc. of the oxygen and nitrogen gas. can do.
[0037]
The portable oxygenator, which is used for carrying and transporting live fish and live bait for fishing , is not limited to the cylindrical object shown in FIG. However, it is generally composed of a gas permeation part and a gas storage part, and the structure may be integrated by providing a fitting part, and separated using an air pipe (tube) or the like. Also good. A gas inlet with a check valve for instantaneously filling the air compressed by the compressed air generator is provided in a part of the gas storage unit, and a craze generating breathable film as a gas permeable material in the gas transmission unit Is used. After filling with compressed air, it is also possible to remove the air supply tube from the gas inlet provided in the gas storage unit to form an independent form. At the time of use, it is necessary to arrange the gas permeation part in water such as a fish tank for live fish transfer, a live bait container for fishing, etc. to increase the amount of dissolved oxygen in advance.
[0038]
【The invention's effect】
As described above, the oxygen replenisher of the present invention uses a craze-generating breathable film as a gas permeable material in the gas permeable part , and limits the permeation amount of compressed air filled in the gas storage part. by configuring the voids (fine hole), oxygen bubbles are ejected in a state of stagnation easily fine bubbles (about 50 [mu] m) in water in water, 20 percent in air, 0.2% carbon dioxide Gas nutrients such as are efficiently mixed or fused into water. In addition, the permeation amount is limited and the amount of gas ejection is suppressed, so that it is possible to continuously supply oxygen for a long time, and filling the gas storage unit with compressed air without interruption. It is not necessary, and it is performed once as needed.
[0039]
The gas storage unit is filled with compressed air using a manual pump, an air compressor (air compressor), or the like with slight pressure (about 0.05 to 0.3 MPa). The same applies to the case where compressed air or the like is supplied to the gas storage section using a commercially available compression cylinder without using a power source at all by using an air pump, an air pump or the like. When using an air compressor (air compressor) activated by a pressure sensor, timer, etc., the compressed air is charged instantly and instantaneously. There is no continuous operation sound. Further, if there is a power outage of several hours at the time of a power outage, the cycle from filling of compressed air to lowering of the oxygen replenishment function takes a long time.
[0040]
The portable oxygenator used for carrying and transferring live fish and live bait for fishing of the present invention is forcibly injected with a gas such as air by using an air pump, an air pump or the like and compressed into a gas storage unit. method of generating air, some Rui by using the method of air compressed oxygen or the like into the gas reservoir using a commercially available compression cylinder, which has to have portability oxygen supply device, the internal air pump mechanism By using the gas storage section provided, even better portability is exhibited. When an air compressor (air compressor) is used, the gas storage unit is filled with compressed air instantaneously, and the gas storage unit and the compressed air generator are separated and the oxygen replenisher is made independent for 3 to 4 hours. It becomes a portable oxygen supply that can be used to some extent. Also in this case, oxygen supply to the water is continuously performed by appropriately replenishing the compressed air using an air pump, an air pump, or the like according to a decrease in the compressed air.
[Brief description of the drawings]
FIG. 1 is a schematic view of an oxygen supply device installed in an aquarium fish tank. FIG. 2 is a perspective view showing an embodiment of the oxygen supply device. FIG. 3 is an explanatory diagram of a breathable film. Oxygen replenisher [Fig. 5] Airbag oxygen replenisher [Explanation of symbols]
2 Air compressor (air compressor)
4 Tube for air supply 6 Water tank for ornamental fish 8 Oxygen replenisher 10 Fitting portion 12 Gas inlet 14 Opening portion 16 Craze generating breathable film 18 Fixed frame 20 Packing 22 Craze 24 Gas 26 Matte oxygen replenisher 28 Air bag Oxygenator

Claims (2)

A gas storage part filled with compressed air as a pressurized gas, and a gas permeable part provided with a gas permeable material for releasing the compressed air filled in the gas storage part, and the gas permeable material The compressed air filled in the gas storage section is in a fine bubble state under the control of the permeation amount by the breathable film. An oxygenator for an aquarium fish tank characterized by being gradually released into the water in the tank.   The oxygen replenisher has portability by providing a mechanism such as an air pump or an air pump outside the gas storage part of the oxygen replenisher so as to be integrated with the oxygen replenisher. Oxygen replenisher for aquarium fish tanks.

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