Water filtration system

Abstract

To provide a water filtration system capable of increasing a versatility of an installation site, having high transportability, and reducing an installation cost.SOLUTION: A water filtration system 1 includes a water filtration device 2, a wind power generation device 7, a solar power generation device 8, and a power supply mechanism 3 for filtering water before treatment by the water filtration device 2, by supplying power from these power generation devices 7 and 8 to a pump 24 of the water filtration device 2. There is provided a structure on which the water filtration device 2, the power generation devices 7 and 8, and the power supply mechanism 3 are mounted, and the structure is configured to be movable. The power supply mechanism 3 includes a control device 10 that controls supply of a power generated by the power generation devices 7 and 8 to a load, and a battery 11 that stores the generated power.SELECTED DRAWING: Figure 3

Description

Technical Field

[0006] , , ,

[0001] The present invention relates to a water filtration system that utilizes natural energy.

Background Art

[0002] Water filtration devices that filter seawater or fresh water such as river water for use as drinking water or domestic water have been put into practical use. However, conventional water filtration devices have been difficult to operate in locations where a grid power supply cannot be utilized.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, technologies that utilize electric power generated by a solar panel or a wind power generation device as the electric power for driving a pump or the like of a water filtration device have been proposed (Patent Documents 1 and 2). Such devices, for example, are divided for each main mechanism and transported, and there is a burden such as a large-scale assembly operation at the installation location. There is a concern that this will increase the cost for installing the water filtration device.

[0005] An object of the present invention is to provide a water filtration system that enhances the versatility of the installation location, has high transportability, and can reduce the installation cost.

Means for Solving the Problems

[0006] The water filtration system of the present invention is a water filtration device, at least one power generation device selected from a wind power generation device, a solar power generation device, and a hydraulic power generation device, A water filtration system comprising a power supply mechanism that supplies power from the power generation device to the load of the water filtration device, thereby causing the water to be filtered by the water filtration device, The structure comprises the water filtration device, the power generation device, and the power supply mechanism, and this structure is configured to be movable. The aforementioned load refers to electrically driven equipment such as pumps that pump water into the pathway before treatment.

[0007] This configuration allows the water filtration system to operate even in locations where grid power is unavailable, as it uses at least one of the following power generation devices—wind, solar, or hydroelectric—to supply power to the water filtration system's load. Therefore, it increases the versatility of the installation location for the water filtration system. Furthermore, the system includes a structure that houses a water filtration device, a power generation device, and a power supply mechanism, and this structure is configured to be movable. Therefore, a water filtration system that has been at least largely assembled at a factory or other location can be transported and installed as a single unit. As a result, the water filtration system can be installed more easily than conventional structures that require large-scale assembly work at the installation site. Thus, it is possible to realize a water filtration system that has high transportability and reduces installation costs.

[0008] The system may further include a solar panel that supplies power to the load separately from the aforementioned solar power generation device, and this solar panel may be connectable to and disconnectable from an electrical connector provided on the structure. If a separate solar panel is provided, the amount of power generated can be supplemented. However, if the separate solar panel is fixed to the ground, etc., the mobility of the structure, i.e., the water filtration system, may not be ensured in emergencies, etc. Therefore, by making the solar panel connectable to and disconnectable from an electrical connector provided on the structure, the water filtration system can be moved freely.

[0009] The power supply mechanism may include a grid power connection section that receives power from the grid. If the water filtration system is installed in a location where it can be connected to the grid, for example, it becomes possible to use a natural energy power generation device such as a wind turbine as the main power source and supplement it with the grid power when a temporary shortage in power generation occurs, or to use the grid power as the main power source and utilize the natural energy power generation device as a backup power source in the event of a power outage.

[0010] The power supply mechanism may include a control device that controls the supply of power generated by the power generator to the load. In this case, the control device controls the power generated by the power generator to be input to, for example, a battery, and the input power to be output to the load.

[0011] The water filtration device includes a tank for storing filtered water, and the control device has a tank water level detection means for detecting the amount of water in the tank, and may perform control to drive the load when the amount of water detected by the tank water level detection means is less than or equal to a specified value. The aforementioned specified values ​​are values ​​arbitrarily determined by design, etc., and are determined by finding appropriate values ​​through, for example, testing and simulation, or both. With this configuration, the control device can ensure that filtered water is stored in the tank by driving the load when there is available storage capacity in the tank. Therefore, the water filtration system, power generation system, and power supply mechanism can be operated efficiently.

[0012] The power supply mechanism includes a battery that stores the power generated by the power generator and outputs the stored power to the load, and the control device has a charge amount detection means for detecting the charge amount of the battery, and may perform control to drive the load when the charge amount detected by the charge amount detection means is equal to or greater than a threshold. The aforementioned threshold is a value arbitrarily determined by design or other means, and is determined by finding an appropriate value through, for example, testing and / or simulation.

[0013] When a battery that stores electricity is fully charged, it cannot be charged any further, so it is necessary to limit the power generation by the power generator. Limiting power generation in this way wastes the electricity that could otherwise be generated, making it inefficient as a renewable energy power generation device. With this configuration, the control device drives the load when the detected charge amount exceeds a threshold, so it is possible to actively advance water filtration by utilizing the electricity that was previously wasted.

[0014] The water filtration device includes a path switching means for switching the water treatment path, and the control device includes an electrical conductivity detection means for detecting the electrical conductivity of the water before treatment, and may control the path switching means to switch the path according to the electrical conductivity detected by the electrical conductivity detection means. The aforementioned electrical conductivity refers to the ability of water to conduct electric current before treatment and is the reciprocal of its electrical resistance. The relationship between the electrical conductivity of the water before treatment and the treatment path is predetermined, for example, through experiments or simulations. This configuration allows for efficient use of generated electricity because the treatment path is switched according to the detected electrical conductivity.

[0015] The structure may be a shipping container. In this case, the structure can be moved using various means of transport such as automobiles, rail, ships, and aircraft. Because shipping containers are highly robust, they can prevent malfunctions in the internal equipment, etc., caused by vibrations and shocks during transport. [Effects of the Invention]

[0016] The water filtration system of the present invention uses a natural energy power generation device to supply power to the load of the water filtration device, allowing the water filtration system to be operated even in locations where grid power is unavailable. The system comprises a structure that houses the water filtration device, power generation device, and power supply mechanism, and since this structure is configured to be movable, it has high transportability and can reduce installation costs. [Brief explanation of the drawing]

[0017] [Figure 1] Perspective view of a water filtration system according to an embodiment of the present invention. [Figure 2] Vertical sectional view of the water filtration system. [Figure 3] Block diagram conceptually showing the configuration of the control system of the water filtration system. [Figure 4] Block diagram of the control device of the water filtration system. [Figure 5] Diagram showing the relationship between the power generation amount by solar power generation and surplus power. [Figure 6] Flowchart showing the conditions for driving the pump of the water filtration system. [Figure 7] Flowchart stepwise showing a method for switching the path of the treated water of the water filtration system. [Figure 8] Perspective view showing an example of the installation method of the water filtration system. [Figure 9] Perspective view of a water filtration system according to another embodiment of the present invention. [Figure 10] Front view showing the state where the opening / closing door of the water filtration system according to another embodiment of the present invention is open.

Embodiments for Carrying Out the Invention

[0018] Embodiments of the present invention will be described with reference to FIGS. 1 to 8. As shown in FIG. 1, a water filtration system 1 according to an embodiment of the present invention includes a water filtration device 2 (FIG. 2), natural energy power generation devices including both a wind power generation device 7 and a solar power generation device 8, a power supply mechanism 3 shown in FIG. 2, and a structure 4 on which these water filtration device 2, the power generation devices 7 and 8 in FIG. 1, and the power supply mechanism 3 (FIG. 2) are mounted. The water filtration device 2 in FIG. 2 is a device that filters seawater or fresh water such as river water and uses it as drinking water or domestic water. The power supply mechanism 3 supplies power from the power generation devices 7 and 8 shown in FIG. 1 to the load of the water filtration device 2 shown in FIG. 2, thereby causing the water before treatment to be filtered by the water filtration device 2.

[0019] <Structure 4> Structure 4 houses the water filtration device 2, as well as the control device 10 and battery 11 of the power supply mechanism 3. Structure 4 is movable, box-shaped, and robust, with, for example, double-hinged doors that allow for loading and unloading of the water filtration device 2 and the power supply mechanism 3. As shown in Figure 1, structure 4 has a roughly rectangular top wall 4a and bottom wall 4b, and four peripheral walls 4c provided between these top wall 4a and bottom wall 4b, and the whole structure is formed in a roughly rectangular parallelepiped shape. Specifically, this structure 4 is a transport container.

[0020] In this specification, "transport container" preferably refers to a container of standard dimensions for freight transport, such as a container of the domestic standard dimensions used for transporting containers. Here, "standard" may refer to a standard established by a domestic administrative agency or an international organization such as the International Organization for Standardization (ISO), or it may refer to the JR container, which can be considered the de facto standard for rail freight transport containers in Japan.

[0021] By constructing structure 4 from shipping containers, it becomes possible to move it using various means of transport such as automobiles, trains, ships, and aircraft. Furthermore, because shipping containers are highly robust, it is possible to prevent malfunctions in the internal equipment due to vibrations and shocks during transport.

[0022] <Wind power generation device 7> The wind power generation device 7 comprises a wind turbine 14 and a generator 15 that generates electricity driven by the wind turbine 14. The wind turbine 14 is configured as a vertical-axis wind turbine. Specifically, the wind turbine 14 has a plurality of (two in this example) blades 14a and a blade support 14b that supports these blades 14a. Each blade 14a extends in the vertical direction, and the blade support 14b is rotatably supported around a vertical axis at the upper end of a support column 16 via a bearing (not shown). The two blades 14a are positioned at 180-degree phase differences with respect to the axis of the support column 16. The support column 16 is fixed to the upper center of one of the peripheral walls 4c of the structure 4.

[0023] The generator 15 of the wind power generation device 7 is located inside a generator casing 17 attached to the top of the support column 16. The fixed ring of the bearing is attached to the generator casing 17, and the rotating ring of the bearing is connected to the blade support 14b. As the wind turbine 14 rotates, the rotor of the generator 15 rotates together with the rotating ring inside the generator casing 17, causing the generator 15 to generate electricity. For example, an induction generator or a synchronous generator can be used as the generator 15.

[0024] Vertical-axis wind turbines are suitable as wind turbines 14 for wind power generation devices 7 installed on transportable structures 4 because they can generate electricity even when relatively small by receiving wind. However, the wind turbine may also be a horizontal-axis wind turbine.

[0025] <Solar power generation device 8> The photovoltaic power generation device 8 includes a photovoltaic panel 8a that converts sunlight into photoelectric energy, and a panel mounting frame 8b for attaching the photovoltaic panel 8a to the structure 4. In this example, the photovoltaic panel 8a is mounted on the top wall 4a of the structure 4 via the panel mounting frame 8b. Depending on the direction of sunlight or the installation environment, the photovoltaic panel 8a may be installed on the perimeter wall 4c of the structure 4, or it may be arranged in a spread-out configuration around the structure 4. The panel mounting frame 8b may be equipped with a mechanism that allows the photovoltaic panel 8a to be tilted to match the direction of the sun.

[0026] <Water filtration device 2> As shown in Figure 3, the water filtration device 2 includes a pump 24 (which is the load), a filtration membrane 25, first and second reverse osmosis membranes 26 and 27, a switching valve 28 (which is the path switching means), and a tank 29. The water filtration device 2 filters untreated water pumped from seawater or freshwater by flowing it along paths R1 and R2, which include piping, and stores the filtered water in the tank 29. Along the flow direction of paths R1 and R2, the pump 24, filtration membrane 25, first reverse osmosis membrane 26, switching valve 28, second reverse osmosis membrane 27, and tank 29 are sequentially connected by piping.

[0027] Pump 24 pumps up seawater or freshwater and pumps the treated water along the aforementioned paths R1 and R2, while simultaneously applying reverse osmotic pressure to the treated water through the first and second reverse osmosis membranes 26 and 27. The filtration membrane 25 is a separation membrane that removes turbidity before filtration by the first reverse osmosis membrane 26. The first reverse osmosis membrane 26 applies pressure exceeding the osmotic pressure through the membrane to separate the treated water treated by the filtration membrane 25 from impurities. As a result, the first reverse osmosis membrane 26 allows only the solvent to pass through, while solutes (salts, etc.) do not. The second reverse osmosis membrane 27 is similar to the first reverse osmosis membrane 26.

[0028] The treated water processed by the first reverse osmosis membrane 26 is either stored in the tank 29 via a switching valve 28 or is further treated by the second reverse osmosis membrane 27 before being stored in the tank 29. As described later, when treating freshwater, the first path R1 is used, which goes to the tank 29 via the first reverse osmosis membrane 26 and the switching valve 28, and when treating seawater, the second path R2 is used, which goes to the tank 29 via the first reverse osmosis membrane 26, the switching valve 28, and the second reverse osmosis membrane 27. As the switching valve 28, for example, an electromagnetic switching valve that moves a spool to switch the flow path in response to a command from the control device 10 is used.

[0029] <Control systems, etc.> The power supply mechanism 3 comprises a control device 10 and a battery 11. The battery 11 stores electricity generated by the wind power generator 7 and the solar power generator 8, and this stored electricity is supplied to the pump 24. Depending on the season, there may be a shortage of electricity from the generators 7 and 8, but since the power supply mechanism 3 is equipped with a battery 11 that can supply stored electricity for several days, it is possible to operate it in emergency situations. As shown in Figure 2, the battery 11 is installed in the structure 4 in a state where it is housed in a battery storage box 11a.

[0030] As shown in Figure 3, the control device 10 consists of a computer, a program executed on it, and various electronic circuits. The control device 10 controls the input of power generated by the power generators 7 and 8 to the battery 11, and the output of power from the battery 11 to the pump 24. The control device 10 includes, for example, an AC / DC converter that converts the AC power generated by the power generators 7 and 8 into a DC voltage that can be stored in the battery 11, and an inverter that converts the power stored in the battery 11 into a sinusoidal AC similar to AC commercial power, or a square wave AC.

[0031] Incidentally, renewable energy is a limited energy source, and the amount of energy that can be generated varies greatly depending on the season. On the other hand, the amount of water that we want to produce does not change much with the seasons. Therefore, in seasons when power generation tends to be low, such as winter, it becomes difficult to operate solely on renewable energy. For this reason, technologies that supplement power generation according to the season (Figure 9), as described later, or technologies that maximize the period during which power can be generated are effective.

[0032] <Regarding sensors (load)> The water filtration system 1 is equipped with a power meter Sa for measuring the power consumption of the pump 24, a water volume sensor Sb for detecting the amount of water in the tank 29, an electrical conductivity sensor Sc for detecting the electrical conductivity of the water before treatment, and a voltage sensor Sd for detecting the voltage of the battery 11. Power may be supplied using a natural energy power generation device. As the water volume sensor Sb, for example, a float-type level sensor that measures the liquid level in the tank 29 using a float, or a pressure-type level sensor that measures the liquid level in the tank 29 using the pressure at the bottom of the container may be used. As the electrical conductivity sensor Sc, for example, a conductivity-type concentration meter that measures the concentration of an electrolyte using the conductivity of the solution may be used.

[0033] As shown in Figure 4, the control device 10 has a detection unit 10a that detects the output of each sensor and a drive control unit 10b. The detection unit 10a has a power monitoring means 30, a tank water level detection means 31, a charge level detection means 33, and an electrical conductivity detection means 34. The power monitoring means 30 monitors the power of the pump 24 by continuously or periodically detecting the output from the power measuring instrument Sa. The tank water level detection means 31 detects the water level in the tank 29 (Figure 3) by detecting the output from the water level sensor Sb. The charge level detection means 33 detects the charge level of the battery 11 by detecting the output from the voltage sensor Sd. The electrical conductivity detection means 34 detects the electrical conductivity of the water before processing by detecting the output from the electrical conductivity sensor Sc.

[0034] The drive control unit 10b includes a pump drive control unit 35 and a path switching control unit 36. In this example, the pump drive control unit 35 controls the pump 24 to drive when the amount of water detected by the tank water level detection means 31 is below a specified value and the charge level of the battery 11 detected by the charge level detection means 33 is above a threshold (for example, fully charged).

[0035] Figure 5 shows the relationship between the amount of electricity generated by solar power and the surplus power. The hatched area A1 in the figure represents the wasted electricity, and the edge L of area A1 represents the amount of electricity that can be generated. Solar power generation basically only occurs during the daytime, and once the battery 11 (Figure 4) is fully charged, it is not possible to charge it any further, so it is necessary to limit the amount of electricity generated. For example, when the control device 10 in Figure 4 detects that the battery 11 is fully charged, it limits the amount of electricity generated by the power generation devices 7 and 8 (Figure 3). "Limiting the amount of electricity generated" includes stopping the amount of electricity generated. Because of this inefficiency caused by the limitation of electricity generation, it is desirable to actively promote water filtration during the time when electricity generation is limited.

[0036] Specifically, the pump is driven according to the flowchart shown in Figure 6. The control unit for this control flow is the pump drive control unit 35 in Figure 4. As shown in Figure 6, after the start of this process, if the battery is fully charged or power generation is limited (step a1: Yes), it is determined whether the amount of water in the tank 29 (Figure 4) is below a specified value (step a2). If the amount of water is below the specified value (step a2: Yes), the pump is driven (step a3). Then, the process returns to step a2. If it is determined in step a1 that the battery is not fully charged or power generation is not limited (step a1: No), the pump is stopped (step a4). If the amount of water exceeds a specified value in step a2 (step a2: No), the pump is stopped (step a4). After step a4, the process returns to step a1.

[0037] Furthermore, as shown in Figure 7, changing the route, or so-called filter route, depending on the water before treatment is also power-efficient. The control unit in Figure 7 is the route switching control unit 36 ​​in Figure 4. As shown in Figure 7, after the start of this treatment, if it is determined from the detected electrical conductivity that the water pumped up before treatment is freshwater (step b1: Yes), the switching valve 28 (Figure 3) is controlled to select the first route R1 (Figure 3), which passes only through the first reverse osmosis membrane 26 (Figure 3) of the first and second reverse osmosis membranes 26, 27 (Figure 3) (step b2). Then the process returns to step b1. When the first route R1 (Figure 3) is selected, the power consumption can be reduced compared to when the second route R2 (Figure 3) is selected. If it is determined from the electrical conductivity that the water pumped up before treatment is seawater (step b1: No), the switching valve 28 (Figure 3) is controlled to select the second route R2 (Figure 3), which passes through the first and second reverse osmosis membranes 26, 27 (Figure 3) (step b3). Then return to step b1. In this way, the path switching control unit 36 ​​of the control device 10 in Figure 4 controls the switching valve 28 (Figure 3) to switch between the first and second paths 26 and 27 (Figure 3) according to the electrical conductivity detected by the electrical conductivity detection means 34.

[0038] <Regarding the installation method of the water filtration system> As shown in Figure 8, the structure 4, which houses the water filtration device 2 and power supply mechanism 3, is transported to the desired installation location by, for example, a truck with a loading-type truck crane (truck with a crane), and then the structure 4 is unloaded by the crane 32 of the truck with a crane. The unloading of the structure 4 from various means of transport may also be carried out by a forklift or gantry crane, etc., which are not shown. Next, the wind power generation equipment and solar power generation equipment mounted on the structure 4 are unloaded from the container and attached to their designated positions on the structure 4. Alternatively, the structure 4 may be transported with either or both of the wind power generation equipment and solar power generation equipment already attached to their designated positions. After that, power generation can be started using the respective power generation equipment 7 and 8 shown in Figure 1, and the water filtration system 1 can be put into operation.

[0039] <Effects and Effects> According to the water filtration system described above, the wind power generator 7 and solar power generator 8 shown in Figure 1 are used to supply power to the pump 24 of the water filtration system 2 shown in Figure 3. Therefore, the water filtration system 1 can be operated even in locations where grid power is unavailable. Consequently, the versatility of the installation locations for the water filtration system 1 can be increased. The water filtration system 1 is equipped with a structure 4 as shown in Figure 1, which includes a water filtration device 2, power generation devices 7 and 8, and a power supply mechanism 3, and this structure 4 is configured to be movable. Therefore, the water filtration system 1, which is at least largely assembled at a factory or other location, can be transported and installed as a single unit. For this reason, the water filtration system 1 can be installed more easily than conventional structures that require large-scale assembly work at the installation site. Thus, it is possible to realize a water filtration system 1 that has high transportability and reduces installation costs.

[0040] The control device 10 in Figure 3 drives the pump 29 when there is available storage capacity in the tank 29 and the charge level of the battery 11 is above a threshold, thereby enabling efficient operation of the water filtration device 2, power generation devices 7 and 8, and power supply mechanism 3. Furthermore, it becomes possible to actively advance water filtration by utilizing the electricity that would have been wasted in the past. Furthermore, by switching between water treatment paths R1 and R2 according to the detected electrical conductivity, it becomes possible to effectively utilize the generated electricity.

[0041] <Regarding other embodiments> In the following description, parts corresponding to matters previously described in each embodiment will be denoted by the same reference numerals, and redundant explanations will be omitted. When only a part of the configuration is described, the other parts of the configuration will be the same as those described previously unless otherwise specified. Identical configurations will produce the same effects. Not only are combinations of the parts specifically described in each embodiment possible, but partial combinations of embodiments are also possible, provided that there are no particular problems with the combination.

[0042] <Ground-mounted solar panels> As shown in Figure 9, a solar panel 38 that supplies power to the load pump 24 (Figure 3), separate from the solar power generation device 8, may also be provided. However, if a separate solar panel 38 is provided, it will be fixed to the ground, etc., and there is a concern that the mobility of the water filtration system 1 cannot be ensured if the separate solar panel 38 fixed to the ground, etc. is electrically connected to the control device 10 (see Figure 2) in the structure 4. For this reason, when transporting the water filtration system 1 to another location in an emergency, etc., it is necessary to make the separate solar panel 38 easily removable.

[0043] Therefore, the separate solar panel 38 is configured to be connectable to and disconnectable from an electrical connector 39 provided on the structure 4. The connector, which is the electrical connector 39, is provided, for example, on one of the peripheral walls 4c of the structure 4. The connector is electrically connected to a control device 10 (Figure 3) inside the structure 4. The separate solar panel 38 is a so-called ground-mounted solar panel, installed on the land via a panel mounting frame 38b, and is configured to be connectable to and disconnectable from the electrical connector 39 via a power supply cable 40. When the separate solar panel 38 is connected to the electrical connector 39, the amount of power generated can be supplemented, and when it is disconnected from the electrical connector 39, the water filtration system 1 can be moved freely.

[0044] <System power connection section 37> The power supply mechanism 3 (Figure 3) may include a grid power connection section 37 that receives power from the grid power supply 41. In this case, when the water filtration system 1 is installed in a location where it can be connected to the grid power supply 41, for example, it becomes possible to use the wind power generator 7 or the solar power generator 8 as the main power source and supplement any temporary power shortages with the grid power supply 41, or to use the grid power supply 41 as the main power source and utilize the wind power generator 7 or the solar power generator 8 as a backup power source during power outages.

[0045] <Configuration equipped with a hydroelectric power generation device> As shown in Figure 10, the water filtration system 1 may include a hydroelectric power generation device 19 that can be installed in the waterway and can be housed in and removed from the structure 4. This hydroelectric power generation device 19 includes, for example, a base 20 installed in the waterway, a water turbine 21, a frame 22 that holds the water turbine 21, and a generator 23 supported by the frame 22 that generates electricity by the rotation of the water turbine 21. As shown in Figure 3, when the water filtration system 1 is equipped with a wind power generator 7, a solar power generator 8, and a hydroelectric power generator 19, natural energy can be efficiently utilized in accordance with the surrounding environment of the installation area of ​​the water filtration system 1. Furthermore, the combination of multiple natural energy generation methods enables energy storage that can respond to changes in weather. Other effects and advantages similar to those of the embodiments described above are also achieved.

[0046] The water filtration system 1 may be configured to include at least one of the following power generation devices: a wind power generation device 7, a solar power generation device 8, and a hydroelectric power generation device 19.

[0047] The pump drive control unit 35 of the control device 10, shown in Figure 4, may perform control to drive the pump 24 only when the amount of water detected by the tank water level detection means 31 is less than or equal to a specified value. The pump drive control unit 35 of the control device 10 may perform control to drive the pump 24 only when the condition that the charge level of the battery 11 is above a threshold is met. The structure may be a movable, simple building instead of a shipping container. In cases where it is decided to filter only freshwater, the water filtration system may be configured without the second reverse osmosis membrane and switching valve.

[0048] <Reference proposal example> As a reference example, we propose a water filtration system equipped with a mechanism for automatically distinguishing between freshwater and seawater. This water filtration system is described as follows, referring to Figure 3. A water filtration system comprising a water filtration device 2 and a control device 10 that controls the filtration of water before treatment by the water filtration device 2 by controlling the supply of power to the load of the water filtration device 2, The water filtration device 2 includes a path switching means 28 for switching between water treatment paths R1 and R2, and the control device 10 has an electrical conductivity detection means 34 (Figure 4) for detecting the electrical conductivity of the water before treatment, and controls the path switching means 28 to switch between paths R1 and R2 according to the electrical conductivity detected by the electrical conductivity detection means 34 (Figure 4). This configuration allows for the automatic switching of water treatment paths R1 and R2 according to the detected electrical conductivity, i.e., whether it is freshwater or seawater, making it possible to effectively utilize the generated electricity.

[0049] While embodiments for carrying out the present invention have been described above, the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0050] 1...Water filtration system, 2...Water filtration device, 3...Power supply mechanism, 4...Structure, 7...Wind power generation device, 8...Solar power generation device, 10...Control device, 11...Battery, 24...Pump (load), 28...Switching valve (path switching means), 29...Tank, 31...Tank water volume detection means (load), 33...Charge amount detection means (load), 34...Electrical conductivity detection means (load), 37...Grid power connection part (load), 38...Solar panel, 39...Electrical connector, 41...Grid power

Claims

1. Water filtration system, A power generation device consisting of at least one of the following: a wind power generation device, a solar power generation device, and a hydroelectric power generation device. A water filtration system comprising a power supply mechanism that supplies power from the power generation device to the pump of the water filtration device, thereby causing the water to be filtered by the water filtration device, The structure comprises the water filtration device, the power generation device, and the power supply mechanism, and this structure is configured to be movable. The power supply mechanism includes a control device that controls the supply of electricity generated by the power generator to the pump, The water filtration device includes a path switching means for switching between a first path used when treating freshwater and a second path used when treating seawater as a water treatment path, and the control device has an electrical conductivity detection means for detecting the electrical conductivity of the water before treatment, and controls the path switching means to switch between the first path, which passes through only one reverse osmosis membrane, and the second path, which passes through two reverse osmosis membranes, according to the electrical conductivity detected by the electrical conductivity detection means.

2. A water filtration system according to claim 1, further comprising a solar panel that supplies power to the pump separately from the solar power generation device, wherein the solar panel is connectable to and disconnectable from an electrical connector provided in the structure.

3. A water filtration system according to claim 1 or claim 2, wherein the power supply mechanism comprises a grid power connection unit that receives power from a grid power supply.

4. A water filtration system according to claim 1, wherein the water filtration device comprises a tank for storing filtered water, and the control device has a tank water volume detection means for detecting the amount of water in the tank, and controls the pump to drive when the amount of water detected by the tank water volume detection means is less than or equal to a specified value.

5. A water filtration system according to claim 4, wherein the power supply mechanism includes a battery that stores the power generated by the power generator and outputs the stored power to the pump, and the control device has a charge amount detection means for detecting the charge amount of the battery, and controls the pump to drive when the charge amount detected by the charge amount detection means is greater than or equal to a threshold.

6. A water filtration system according to any one of claims 1 to 5, wherein the structure is a transport container.

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