Rainwater drinking water purification system and rainwater drinking water method
The rainwater purification system uses filtration and UV sterilization with sensor-controlled drainage to remove contaminants, addressing inefficiencies in existing systems and providing safe drinking water.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KANAI EDUCATIONAL INSTITUTION
- Filing Date
- 2022-02-15
- Publication Date
- 2026-05-20
Smart Images
Figure 0007862832000003 
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Figure 0007862832000005
Abstract
Description
Technical Field
[0004] , , ,
[0001] The present invention relates to a rainwater drinking water purification device and a water purification method thereof.
Background Art
[0002] In order to effectively utilize rainwater, a rainwater tank that stores rainwater from the roof through a downspout is used. However, in the process of falling from raindrop formation to the ground, rain falls while taking in atmospheric aerosol particles into the raindrops. Therefore, especially in the initial rain, it contains a lot of various pollutants and has a high degree of pollution. In addition, the rainwater flowing out into the downspout also contains dirt such as insoluble solids accumulated on the roof surface that serves as the rainwater collection surface. Therefore, in order to keep the water quality in the rainwater tank clean, various initial rainwater removal devices have been developed and are commercially available.
[0003] For example, the initial rainwater removal device according to Patent Document 1 is a storage-type initial rainwater removal device that relays a downspout attached below the roof of a building and a rainwater tank for draining rainwater falling on the building, and can inject water from a water injection port into the rainwater tank. This initial rainwater removal device includes a water level sensor equipped with a communication device that can measure the water level from a drain port, a computer capable of transmitting and receiving with the water level sensor, and drainage means capable of opening and closing the drain port according to a signal received from the computer. The water level sensor senses the water level of the rainwater stored in the main body and transmits the water level to the computer. The computer transmits an opening signal or a closing signal to the drainage means according to the water level, and the drainage means opens and closes the drain port according to the received signal to store and drain rainwater. And the rainwater collected in the main body can be stored up to the height of the water injection port for injecting water into the rainwater tank, and can be drained using the drainage means capable of communicating with the computer it includes.
[0004] The initial rainwater removal device described in Patent Document 1 has a collection port and an outlet for collecting rainwater at the bottom, and the above-mentioned inlet is placed at a higher position and connected to the rainwater tank. As a result, impurities with a high specific gravity settle at the bottom, so that only high-quality rainwater, free from such insoluble solids, can be injected into the rainwater tank. However, even with such a high-performance initial rainwater removal device, it is not possible to remove dissolved pollutants dissolved in the rainwater, and it is impossible to use it as drinking water. In other words, since there are no standards for the water quality of rainwater to be stored and discharged, the water quality of the stored rainwater cannot be guaranteed, and it cannot be used as drinking water.
[0005] Alternatively, as a device for reusing rainwater, Patent Document 2 discloses "a water reuse device having a storage tank for storing water or rainwater and bathtub wastewater, and a water supply unit for sending water from the storage tank to a customer, characterized in that an electrolytic water adding means is provided for adding electrolyzed water containing chlorine into the storage tank." Here, the electrolytic water adding means is, for example, a means for electrolyzing tap water and adding a substance that supplies chlorine components such as sodium chloride or a sodium chloride solution to the water to be electrolyzed.
[0006] However, while the water recycling device described in Patent Document 2 can sterilize rainwater by supplying chlorine, it cannot remove dissolved pollutants that have dissolved in the rainwater. Therefore, even with such a water recycling device, it is difficult to use rainwater as drinking water.
[0007] The water treatment system for producing drinking water and / or reclaimed water from rainwater described in Patent Document 3 consists of a raw water receiving tank that receives collected rainwater and a water treatment device that purifies the received water to produce drinking water and / or reclaimed water. The water treatment device has a microfilter filtration device and a reverse osmosis membrane device, and a turbidity sensor is installed downstream of each microfilter filtration device, and an electrical conductivity meter is installed downstream of the reverse osmosis membrane device to monitor the concentration of turbidity components and electrical conductivity, respectively. If an abnormal value is detected, the valve in the piping downstream of the microfilter filtration device or the reverse osmosis membrane device is immediately closed. In the case of a membrane rupture or the like, the water treatment system for producing drinking water and / or reclaimed water from rainwater described in Patent Document 3 can immediately close the valve in the piping from the membrane treatment device to the treated water storage tank and stop the water supply, thus preventing the generation of treated water of abnormal quality.
[0008] [Patent Document 1] Patent No. 6860898 [Patent Document 2] Japanese Patent Application Publication No. 11-343643 [Patent Document 3] Japanese Patent Publication No. 2011-121013 [Overview of the project] [Problems that the invention aims to solve]
[0009] The water treatment system for producing drinking water and / or reclaimed water from rainwater described in Patent Document 3 has a microfilter filtration system and a reverse osmosis membrane system, which allows for sterilization and removal of dissolved contaminants from rainwater. Furthermore, by installing a turbidity sensor downstream of the microfilter filtration system and an electrical conductivity meter downstream of the reverse osmosis membrane system, the concentration of turbidity components and electrical conductivity are monitored, respectively. If an abnormal value is detected, the valve in the piping downstream of the microfilter filtration system or the reverse osmosis membrane system is immediately closed, thereby ensuring the water quality for drinking.
[0010] However, reverse osmosis membrane systems are large and expensive, consume a lot of energy to operate, and discard half of the rainwater they collect, leaving only about half as purified water. Therefore, they are not efficient as rainwater purification systems for drinking water.
[0011] To solve these problems, the present invention provides a simple, inexpensive, lightweight, and energy-efficient rainwater drinking water purification device that can remove insoluble solids and dissolved contaminants from rainwater without using a reverse osmosis membrane device, thereby obtaining sterilized drinking water, as well as a rainwater drinking water purification method. [Means for solving the problem]
[0012] ● Rainwater drinking water purification system The rainwater drinking water purification device according to the present invention is (1-1) A reservoir tank that receives rainwater collected via a water receiving pipe, (1-2) A first water supply pipe equipped with a drain electromagnetic valve is connected to the reservoir tank, and the water received from the reservoir tank via the first water supply pipe is filtered. Insoluble solid particles Remove Filtration system including precision filtration membrane and, (1-3) The filtration device via the second water supply pipe Precision filtration membrane A UV sterilization device (hereinafter also referred to as "UV sterilization device") is connected to the second water supply pipe and sterilizes the water received from the filtration device via the second water supply pipe using ultraviolet light (hereinafter also referred to as "UV light") to eliminate bacteria, (1-4) A control device that can communicate with the drain electromagnetic valve provided in the first water supply pipe and sends an open / close signal to it, (1-5) The water receiving pipe or the reservoir tank is equipped with one or more water quality detection sensors for measuring the water quality of the rainwater. (1-6) The one or more water quality detection sensors transmit their respective measurement results to the control device, which analyzes the measurement results and sends an open / close signal to the drain solenoid valve. It can be sent, (1-7) If at least one of the analyzed measurement results does not meet the predetermined water quality standard, an open signal is sent to the drain solenoid valve to command drainage. (1-8) If all measurement results meet the predetermined water quality standards, a close signal is sent to the drain solenoid valve to command water to be supplied. (1-9) A rainwater purification system for making drinking water available, (2-1) The rainwater that does not meet the specified water quality standards is drained by the drain solenoid valve, which has entered the "open state" upon receiving an open signal, to remove dissolved pollutants. (2-2) When the rainwater meets the specified water quality standards, the drain solenoid valve, which has received a closing signal, enters a "closed state," and the filtration device receives the water via the first water supply pipe. (2-3) The rainwater is purified by filtering and sterilizing insoluble solids (fine particles) and bacteria, respectively, using the aforementioned filtration device and UV sterilization device. (3) Insoluble solids (fine particles) and dissolved contaminants can be removed from the rainwater collected in the reservoir tank, and sterilized drinking water can be obtained. 。
[0013] (Water quality detection sensor) In the rainwater drinking water purification device according to the present invention, the control device analyzes the measurement results received from the one or more water quality detection sensors, comprehensively judges the measurement results, and when the measurement results do not meet a predetermined water quality standard, sends an open signal instructing drainage to the drainage electromagnetic valve. For example, when at least any one of the measurement results does not meet a predetermined water quality standard, an open signal instructing drainage may be sent to the drainage electromagnetic valve.
[0014] (Water quality display lamp) In the rainwater drinking water purification device according to the present invention, the reservoir tank includes one or more water quality display lamps capable of communicating with the control device, and the control device analyzes the measurement results received from the one or more water quality detection sensors, and according to whether each measurement result meets a predetermined water quality standard, sends a signal instructing the water quality display lamp corresponding to the water quality detection sensor that transmitted the measurement result to emit light, so that the water quality can be visualized in an easy-to-understand manner.
[0015] (Electrical conductivity sensor, pH sensor) In the rainwater drinking water purification device according to the present invention, the water quality detection sensor may be an electrical conductivity sensor for measuring electrical conductivity (hereinafter also referred to as "EC") and / or a pH sensor for measuring acidity / alkalinity (hereinafter also referred to as "pH").
[0016] (Electrical conductivity) In the rainwater drinking water purification device according to the present invention, the water quality detection sensor is an electrical conductivity sensor for measuring electrical conductivity (EC), and when the electrical conductivity (EC) of the measurement result received from the electrical conductivity sensor is 40 μS / cm or more, the control device may send an open signal instructing drainage to the drainage electromagnetic valve.
[0017] (pH) In the rainwater potable water purification device according to the present invention, the water quality detection sensor is a pH sensor that measures acidity and alkalinity, and when the pH of the measurement result received from the pH sensor is greater than 7 or less than 5, the control device can send an open signal for instructing drainage to the drainage electromagnetic valve.
[0018] (Filter) In the rainwater potable water purification device according to the present invention, the filtration device includes a microfiltration membrane (also referred to as a microfilter, hereinafter also referred to as "MF membrane" in this specification). This filtration device may further include an activated carbon filter and other filtration membranes and filters. The MF membrane is essential for this filtration device, and the MF membrane is installed immediately before the UV sterilization device. Hereinafter, the filtration by the filtration device according to the present invention is also referred to as "MF filtration".
[0019] (Filtration device) In the rainwater potable water purification device according to the present invention, the filtration device is a filtration device in which the microfiltration membrane and the activated carbon filter are connected by a connecting pipe, the first water supply pipe is connected to the activated carbon filter, and the second water supply pipe is connected to the microfiltration membrane.
[0020] ●Rainwater potable water method The rainwater potable water method according to the present invention is (1) Prepare a rainwater potable water purification device including a reservoir tank connected to a water receiving pipe, a filtration device connected to the reservoir tank by a first water supply pipe provided with a drainage electromagnetic valve, and a UV sterilization device connected to the filtration device by a second water supply pipe, wherein the water receiving pipe or the reservoir tank is provided with one or more water quality detection sensors for measuring the water quality of rainwater; (2) Prepare a control device that can communicate with the one or more water quality detection sensors and the drainage electromagnetic valve and send an open / close signal thereto; (3) Collect the rainwater received by the reservoir tank through the water receiving pipe; (4) The one or more water quality detection sensors measure the water quality of the rainwater and transmit the respective measurement results to the control device, (5) The control device analyzes the measurement results and sends an open / close signal to the drain solenoid valve of the first water supply pipe, Includes, Step (5) in which the control device sends an open / close signal to the drain solenoid valve, (5-1) If any one of the measurement results received from the one or more water quality detection sensors does not meet the predetermined water quality standard, (5-1-1) A step of sending an open signal to the drain electromagnetic valve to command drainage, Includes, (5-2) If the measurement results received from the one or more water quality detection sensors all meet the predetermined water quality standards, (5-2-1) A step of sending a closing signal to the drain electromagnetic valve to command it to supply water, This is a method for making rainwater drinkable, (6) The drain electromagnetic valve that receives the opening / closing signal opens and closes its valve, thereby discharging rainwater that has flowed in from the reservoir tank or sending it to the filtration device via the first water supply pipe. And, (6-1) The rainwater that does not meet the specified water quality standards is drained by the drain solenoid valve, which has entered the "open state" upon receiving an open signal, thereby removing dissolved pollutants. , (6-2) The rainwater that meets the predetermined water quality standards is sent to the filtration device via the first water supply pipe when the drain solenoid valve, which has received a closing signal, enters a "closed state" upon receiving the closing signal. A step that selectively executes one of the following steps, (7) The filtration device filters the rainwater received through the first water supply pipe. Insoluble solids (fine particles) The steps to remove, (8) The UV sterilization device sterilizes the rainwater received from the filtration device via the second water supply pipe using ultraviolet light to eliminate bacteria, (9) The step of taking drinking water from the UV sterilization device, (10) This allows for the removal of insoluble solids (fine particles) and dissolved contaminants from rainwater collected in the reservoir tank, thereby obtaining sterilized drinking water.
[0021] (Drain solenoid valve open signal) In the rainwater drinking water method according to the present invention, (5) The step of the control device sending an open / close signal to the drain solenoid valve is: (5-1) If any one of the measurement results received from the one or more water quality detection sensors does not meet the predetermined water quality standard, (5-1-1) A step of sending an open signal to the drain electromagnetic valve to command drainage, Includes.
[0022] (Water quality indicator lamp) The rainwater drinking water conversion method according to the present invention, in the step of preparing the rainwater drinking water purification device, the reservoir tank is equipped with one or more water quality indicator lamps, each corresponding to one or more water quality detection sensors and capable of communicating with the control device, (5) The step of the control device sending an open / close signal to the drain solenoid valve is: (5-1) If any one of the measurement results received from the one or more water quality detection sensors does not meet the predetermined water quality standard, (5-1-2) A step of sending an ON signal to the water quality indicator lamp corresponding to the water quality detection sensor that has transmitted a measurement result that does not meet the predetermined water quality standard, It may also include the following.
[0023] (Drain solenoid valve closed signal) The rainwater drinking water conversion method according to the present invention, in the step of preparing the rainwater drinking water purification device, the reservoir tank is equipped with one or more water quality indicator lamps, each corresponding to one or more water quality detection sensors and capable of communicating with the control device, (5) The step of the control device sending an open / close signal to the drain solenoid valve is: (5-2) If the measurement results received from the one or more water quality detection sensors all meet the predetermined water quality standards, (5-2-1) A step of sending a closing signal to the drain electromagnetic valve to command it to supply water, Includes.
[0024] (Designated water quality indicator lamp) The rainwater drinking water method according to the present invention is In the step of preparing the rainwater drinking water purification device, the reservoir tank is equipped with one or more water quality indicator lamps, each corresponding to one or more water quality detection sensors and capable of communicating with the control device, (5) The step of the control device sending an open / close signal to the drain solenoid valve is: (5-2) If the measurement results received from the one or more water quality detection sensors all meet the predetermined water quality standards, (5-2-2) A step of transmitting an ON signal to command the predetermined water quality indicator lamp to light up, It may also include the following. [Effects of the Invention]
[0025] The rainwater drinking water purification system according to the present invention uses a water quality detection sensor attached to the rainwater collection pipe to measure electrical conductivity (EC) and pH, which are constantly changing depending on the rainfall conditions. Based on these measurements, water intake and discharge can be controlled. Therefore, dissolved pollutants in rainwater that cannot be removed by filtration and UV sterilization devices can be eliminated before the rainwater is sent to these devices.
[0026] On the other hand, insoluble solids (particulate matter) and bacteria (total viable bacteria, E. coli, etc.) that cannot be detected by these water quality sensors can be completely and inexpensively purified by MF filtration using a filtration system and UV sterilization using a UV sterilization system. Furthermore, UV sterilization using a UV sterilization system can kill spore-forming bacteria and other bacteria that cannot be killed by heating, and provides a safer sterilization method than heat sterilization.
[0027] Therefore, the rainwater drinking water purification system according to the present invention can remove both dissolved contaminants and insoluble solids present in rainwater without using a large, expensive, and energy-intensive reverse osmosis membrane system. The collected rainwater can be purified and then extracted as drinking water from a UV sterilization device. By using compact components such as the reservoir tank, filtration device, and UV sterilization device, this rainwater drinking water purification system according to the present invention can be made sufficiently portable.
[0028] Furthermore, the rainwater drinking water purification device of the present invention has a water quality indicator lamp installed in the reservoir tank, and the water quality indicator lamp is illuminated according to the water quality measurement value measured by the water quality detection sensor, so the water quality of the rainwater collected in the reservoir tank can be monitored and visualized. In other words, the reservoir tank equipped with the water quality indicator lamp is a transparent container or has a transparent window, so the rainwater in the reservoir tank illuminated by the water quality indicator lamp can be observed from the outside, so insoluble solids can be confirmed by visual inspection, and the presence or absence of dissolved pollutants detected by the sensor can be confirmed by the color of the illuminated rainwater.
[0029] Thus, the rainwater drinking water purification system of the present invention visualizes water quality in an easily understandable way, making it a user-friendly, portable water purification system that takes usability into consideration. Furthermore, if installed in evacuation centers such as gymnasiums, it can be used as an on-site water supply system that uses rainwater as its raw water source. [Brief explanation of the drawing]
[0030] [Figure 1] A schematic front view of the rainwater drinking water purification device according to the present invention. [Figure 2] A schematic front view of a rainwater drinking water purification system according to an embodiment. [Figure 3] A schematic front view of a reservoir tank in which a water quality indicator lamp according to an embodiment is installed below it, (a) a schematic front view of a reservoir tank with two LED lamps (water quality indicator lamps) of red and blue installed, and (b) a schematic front view of a reservoir tank with three LED lamps of red, green and blue installed. [Figure 4] Flowchart of the rainwater drinking water method according to the present invention. [Figure 5] Flowchart of the method for transmitting open / close signals in the rainwater drinking water method according to the present invention. [Modes for carrying out the invention]
[0031] The embodiments and examples of the rainwater drinking water purification device and its water purification method according to the present invention will be described below with reference to the drawings. The same reference numerals will be used for the same components throughout the following drawings. 1. Rainwater purification system for drinking water
[0032] As shown in Figure 1, the rainwater drinking water purification device 1 according to the present invention includes a reservoir tank 5 that receives collected rainwater from a receiving pipe 10, a filtration device 7 connected to the reservoir tank 5 by a first water supply pipe 12 equipped with a drain electromagnetic valve 13, a UV sterilization device 9 connected to the filtration device 7 by a second water supply pipe 14, and a control device 3 that can communicate with the drain electromagnetic valve 13 and send an open / close signal to it, and is a water purification device that extracts drinking water from the UV sterilization device 9.
[0033] (filtration device) The filtration device 7 described above can filter water received from the reservoir tank 5 via the first water supply pipe 12 to remove insoluble solids. In the rainwater drinking water purification device 1 of the present invention, the filtration device 7 includes a microfiltration membrane 73 (MF membrane) as shown in Figure 2, and may further include an activated carbon filter 71 (see Figure 2) and other filtration membranes, filters, etc. Here, the activated carbon filter 71 can remove odors and organic matter, and the microfiltration membrane 73 can remove bacteria and insoluble solids.
[0034] (UV sterilizer) Furthermore, the UV sterilization device 9 can sterilize the water received from the filtration device 7 via the second water supply pipe 14 using UV light, thereby eliminating bacteria. UV sterilization by the UV sterilization device 9 can kill spore-forming bacteria and other bacteria that cannot be killed by heating, and provides a safer sterilization method than heat sterilization.
[0035] (Water quality detection sensor) In the rainwater drinking water purification device 1 of the present invention, the water receiving pipe 10 or reservoir tank 5 is equipped with one or more water quality detection sensors 20 for measuring the water quality of rainwater. These one or more water quality detection sensors 20 transmit their respective measurement results to the control device 3, which analyzes the measurement results and sends an open / close signal to the drain electromagnetic valve 13. The open / close signals that the control device 3 transmits to the drain electromagnetic valve 13 are of two types: an open signal that opens the drain electromagnetic valve 13 to drain the rainwater, and a closed signal that closes the drain electromagnetic valve 13 to send the rainwater to the filtration device 7.
[0036] (Control device) The control device 3 can be, for example, a microcontroller or a smartphone, but is not particularly limited as long as it has the function of receiving measurement results from the water quality detection sensor 20, analyzing them, and sending an open / close signal to the drain solenoid valve 13. It may also be a circuit consisting of a transmitting / receiving circuit and a transistor circuit.
[0037] (open signal) In the rainwater drinking water purification device 1 of the present invention, the control device 3 analyzes the measurement results received from one or more water quality detection sensors 20, and sends an open signal to the drain electromagnetic valve 13 to command drainage if at least one of the measurement results does not meet a predetermined water quality standard.
[0038] Hereinafter, an embodiment of the rainwater drinking water purification device 1 according to the present invention will be described in detail with reference to Figure 2, including examples. 2. Embodiment of a rainwater drinking water purification system
[0039] (Rainwater drinking water purification system according to an embodiment) As shown in Figure 2, the rainwater drinking water purification system 1 according to this embodiment includes, as described above, a reservoir tank 5 that receives collected rainwater from a receiving pipe 10, a filtration system 7 connected to the reservoir tank 5 by a first water supply pipe 12 equipped with a drain electromagnetic valve 13, a UV sterilization system 9 connected to the filtration system 7 by a second water supply pipe 14, and a control device 3 that can communicate with the drain electromagnetic valve 13 and send an open / close signal to it, and drinking water can be extracted from the UV sterilization system 9.
[0040] (Drain solenoid valve) The drain solenoid valve 13 attached to the first water supply pipe 12 opens and closes according to the open / close signal sent from the control device 3. As described later, if the open / close signal from the control device 3 is an open signal, the drain solenoid valve 13, which was in the "closed state", opens, and the rainwater that has flowed into the first water supply pipe 12 from the reservoir tank 5 up to directly above the drain solenoid valve 13 is drained directly.
[0041] Furthermore, if the open / close signal from the control device 3 is a closed signal, the drain electromagnetic valve 13, which was in the "open state," will be closed, and the first water supply pipe 12 will be able to send rainwater flowing in from the reservoir tank 5 to the filtration device 7.
[0042] In this embodiment, since the first water supply pipe 12 is connected to the lower part of the reservoir tank 5, a magnetic pump is inserted into the first water supply pipe 12 in order to supply water to the filtration device 7 above. A flow meter may also be inserted into the first water supply pipe 12 to measure the flow rate of the supplied water (see Figure 2).
[0043] (filtration device) In the rainwater drinking water purification system 1 of this embodiment, the filtration system 7 consists of an activated carbon filter 71 and a microfiltration membrane 73, and the activated carbon filter 71 and the microfiltration membrane 73 are connected by a connecting pipe 72. The first water supply pipe 12 is connected to the activated carbon filter 71, and the second water supply pipe 14 is connected to the microfiltration membrane 73.
[0044] (Water quality detection sensor) In the rainwater drinking water purification system 1 of this embodiment, the water quality detection sensor 20 may be an electrical conductivity sensor 22 for measuring electrical conductivity (EC) and / or a pH sensor 24 for measuring acidity / alkalinity (pH). In this embodiment, these water quality detection sensors 20 are attached to the water receiving pipe 10, but they may also be attached to the reservoir tank 5.
[0045] (Control device) As described above, the control device 3 analyzes the measurement results received from one or more water quality detection sensors 20, and if any one of the measurement results falls below a predetermined water quality standard, it sends an open signal to the drain electromagnetic valve 13 to command drainage. The predetermined water quality standard can be arbitrarily determined depending on the type of water quality detection sensor 20, but since the purpose of the present invention is to obtain drinking water from rainwater, it is desirable to set a standard appropriate for that purpose. In Figure 2, the control device 3 is connected to the water quality detection sensor 20, the drain electromagnetic valve 13, and the water quality indicator lamp 51 by wires, but communication may also be possible wirelessly. [Examples]
[0046] (pH sensor) In the rainwater drinking water purification device 1 according to this embodiment, the water quality detection sensor 20 is a pH sensor 24 that measures acidity and alkalinity. The control device 3 can be set to send an open signal to the drain electromagnetic valve 13 to command drainage when, for example, the pH of the measurement result received from the pH sensor 24 is less than 5 or greater than 7. [Examples]
[0047] In the rainwater drinking water purification system 1 according to this embodiment, the water quality detection sensor 20 is an electrical conductivity sensor 22 that measures electrical conductivity (EC). The control device 3 can be set to send an open signal to the drain electromagnetic valve 13 to command drainage when the electrical conductivity (EC) measurement result received from the electrical conductivity sensor 22 is, for example, 40 μS / cm or more. [Examples]
[0048] Based on the criteria established in Examples 1 and 2 above, the rainwater drinking water purification device 1 according to this embodiment was operated to meet the appropriately set criteria, and the results shown in Table 1 below were obtained. These results were obtained by a Food Sanitation Law registered organization and met the standards imposed on raw water for the manufacture of soft drinks (see Table 1). Table 2 shows the inspection results for the "Mineral Water Manufacturing Standards".
[0049] [Table 1]
[0050] [Table 2]
[0051] (Water quality indicator lamp) In the rainwater drinking water purification device 1 according to this embodiment, the reservoir tank 5 is equipped with one or more water quality indicator lamps 51 that can communicate with the control device 3. The reservoir tank 5 equipped with the water quality indicator lamps 51 is preferably a transparent container or a container with a transparent window so that the rainwater in the reservoir tank 5 illuminated by the water quality indicator lamps 51 can be observed from the outside.
[0052] The control device 3 analyzes the measurement results received from one or more water quality detection sensors 20, and depending on whether each measurement result meets or does not meet a predetermined water quality standard, sends a signal to the water quality indicator lamp 51 corresponding to the water quality detection sensor 20 that transmitted the measurement result, instructing it to emit light appropriate to the water quality, thereby making the water quality easily understandable and visible. It is desirable to use an energy-efficient LED lamp as such a water quality indicator lamp 51, but the type of water quality indicator lamp is not particularly limited. In the following embodiment, an LED lamp 51 will be used as the water quality indicator lamp 51. [Examples]
[0053] Figure 3(a) shows an embodiment of the reservoir tank 5 in which two LED lamps 51, one red and one blue, are installed below it. In this embodiment, the water quality detection sensor 20 is the pH sensor 24, and the control device 3 sends an ON signal to the red LED lamp 51 to turn on if the pH of the measurement result received from the pH sensor 24 does not meet a predetermined standard (for example, if the pH is greater than 5.7 or less than 5.5). Also, if the pH of the measurement result meets the predetermined standard, an ON signal is sent to the blue LED lamp 51.
[0054] As shown in Figure 3(a), if the pH of the measurement result received from the pH sensor 24 does not meet a predetermined standard, the control device 3 sends an ON signal to the red LED lamp 51(R) and also sends an Open signal to the drain electromagnetic valve 13 to command drainage. As a result, the red LED lamp 51(R) lights up (turns on), and the drain electromagnetic valve 13, now in the "open state," drains the rainwater that has flowed into the first water supply pipe 12 up to directly above it (Figure 3(a), left diagram).
[0055] On the other hand, if the pH of the measurement result received from the pH sensor 24 meets a predetermined standard, the control device 3 sends an ON signal to the blue LED lamp 51(B) and a OFF signal to the drain electromagnetic valve 13 to command water to be supplied. As a result, the blue LED lamp 51(B) lights up (ON), the drain electromagnetic valve 13, which is in the "closed state", closes, and the first water supply pipe 12 supplies rainwater to the filtration device 7 (Figure 3(a), right diagram). [Examples]
[0056] Figure 3(b) shows an example of a reservoir tank 5 with three LED lamps 51, one red, one green, and one blue, installed below it. In this example, the water quality detection sensor 20 is the pH sensor 24 (Example 1) and the electrical conductivity sensor 22 (Example 2). The control device 3 sends an ON signal to the red LED lamp 51 when the pH measurement result received from the pH sensor 24 does not meet a predetermined standard (for example, when the pH is greater than 7 or less than 5), and sends an ON signal to the green LED lamp 51 when the electrical conductivity (EC) measurement result received from the electrical conductivity sensor 22 does not meet a predetermined standard (for example, when the EC is 40 μS / cm or more). If the pH measurement result meets the predetermined standard, the control device 3 sends an ON signal to the blue LED lamp 51.
[0057] As shown in the first figure from the left in Figure 3(b), if the pH of the measurement result received from the pH sensor 24 does not meet a predetermined standard, the control device 3 sends an ON signal to the red LED lamp 51(R) and an OK signal to the drain electromagnetic valve 13 to command drainage. As a result, the red LED lamp 51(R) lights up (turns on), and the drain electromagnetic valve 13, now in the "open state," drains the rainwater that has flowed into the first water supply pipe 12 up to directly above it.
[0058] As shown in the second figure from the left in Figure 3(b), if the electrical conductivity (EC) measurement result received from the electrical conductivity sensor 22 does not meet a predetermined standard, the control device 3 sends an ON signal to the green LED lamp 51(G) and an Open signal to the drain electromagnetic valve 13 to command drainage. As a result, the green LED lamp 51(G) lights up (turns on), and the drain electromagnetic valve 13, now in the "open state," drains the rainwater that has flowed into the first water supply pipe 12 up to directly above it.
[0059] Therefore, if either the red LED lamp 51(R) or the green LED lamp 51(G) is lit (on), the drain electromagnetic valve 13 is in the "open state," and rainwater flowing into the first water supply pipe 12 is drained. If both the red LED lamp 51(R) and the green LED lamp 51(G) are lit (on), the reservoir tank 5 turns yellow (Y), and again the drain electromagnetic valve 13 is in the "open state," and rainwater flowing into the first water supply pipe 12 is drained (see the third figure from the left in Figure 3(b)).
[0060] On the other hand, if the pH and electrical conductivity (EC) measurements received from the pH sensor 24 and the electrical conductivity sensor 22 both meet predetermined criteria, the control device 3 sends an ON signal to the blue LED lamp 51(B) and a OFF signal to the drain electromagnetic valve 13 to command water to be supplied. As a result, the blue LED lamp 51(B) lights up (turns ON), the drain electromagnetic valve 13 closes and enters the "closed state," and the first water supply pipe 12 supplies rainwater to the filtration device 7 (Figure 3(b), far right). 3. How to make rainwater drinkable
[0061] The rainwater drinking water method according to the present invention includes the following steps (STEP 1) to (STEP 9) (see Figure 4). (STEP 1) Step 1: Prepare a rainwater drinking water purification system 1 which includes a reservoir tank 5 connected to a water receiving pipe 10, a filtration device 7 connected to the reservoir tank 5 by a first water supply pipe 12 equipped with a drain solenoid valve 13, and a UV sterilization device 9 connected to the filtration device 7 by a second water supply pipe 14, wherein the water receiving pipe 10 or the reservoir tank 5 is equipped with one or more water quality detection sensors 20 for measuring the water quality of rainwater. (STEP 2) A step to prepare a control device 3 that can communicate with one or more water quality detection sensors 20 and a drain electromagnetic valve 13 and send open / close signals to them. (STEP 3) The collected rainwater is received by the reservoir tank 5 via the receiving pipe 10. (STEP 4) Step 1 or more water quality detection sensors 20 measure the water quality of rainwater and transmit the respective measurement results to the control device 3. (STEP 5) The control device 3 analyzes the measurement results and sends an open / close signal to the drain solenoid valve 13 of the first water supply pipe 12. (STEP 6) Upon receiving the open / close signal, the drain electromagnetic valve 13 opens or closes its valve to discharge rainwater flowing in from the reservoir tank 5 or to send the water to the filtration device 7 via the first water supply pipe 12. (STEP 7) The filtration device 7 filters the rainwater received through the first water supply pipe 12 to remove insoluble solids. (STEP 8) The UV sterilization device 9 sterilizes the rainwater received from the filtration device 7 via the second water supply pipe 14 using ultraviolet light to eliminate bacteria. (STEP 9) Step to extract drinking water from UV sterilization device 9.
[0062] Through the steps described above, the rainwater drinking water purification device 1 according to the present invention can purify rainwater to produce drinking water. Below, the step in (STEP 5) in which the control device 3 analyzes the measurement results and sends an open / close signal to the drain solenoid valve 13 of the first water supply pipe 12 will be explained in more detail, mainly with reference to Figure 5.
[0063] (drainage order) In the rainwater drinking water method according to the present invention, (STEP 5) The step in which the control device 3 sends an open / close signal to the drain solenoid valve 13 is: (STEP 5-1) If any one of the measurement results received from 1 or more water quality detection sensors 20 does not meet the predetermined water quality standard, (STEP 5-1-1) A step of sending an open signal to the drain electromagnetic valve 13 to command drainage, Includes.
[0064] Therefore, if even one of the measurement results received from the water quality detection sensor 20 does not meet the predetermined water quality standard, the rainwater collected from the receiving pipe 10 to the reservoir tank 5 is drained, for example, from a drain pipe connected below the drain electromagnetic valve 13. In other words, the rainwater drinking water purification device 1 according to the present invention can efficiently obtain drinking water by pre-removing highly contaminated rainwater containing many dissolved pollutants before sending it to the filtration device 7 or UV sterilization device 9 if the water quality of the collected rainwater does not reach a certain standard.
[0065] (Water quality indicator light illuminates) The rainwater drinking water conversion method according to the present invention includes, in the step of preparing a rainwater drinking water purification device 1, a reservoir tank 5 equipped with one or more water quality indicator lamps 51 that correspond to one or more water quality detection sensors 20 and can communicate with a control device 3, (STEP 5) The step in which the control device 3 sends an open / close signal to the drain solenoid valve 13 is: (STEP 5-1) If any one of the measurement results received from 1 or more water quality detection sensors 20 does not meet the predetermined water quality standard, (STEP 5-1-2) A step in which an ON signal is sent to the water quality indicator lamp 51 corresponding to the water quality detection sensor 20 that has transmitted a measurement result that does not meet the predetermined water quality standard, to command it to light up. It may also include the following. As mentioned above, it is preferable to use an LED lamp as the water quality indicator lamp 51.
[0066] Thus, the rainwater drinking water purification device 1 according to the present invention illuminates a water quality indicator lamp 51 corresponding to the type of water quality that does not meet a predetermined water quality standard, making the water quality of the rainwater collected in the reservoir tank 5 easily visible.
[0067] (Water supply order) The rainwater drinking water conversion method according to the present invention includes, in the step of preparing a rainwater drinking water purification device 1, a reservoir tank 5 equipped with one or more water quality indicator lamps 51 that correspond to one or more water quality detection sensors 20 and can communicate with a control device 3, (STEP 5) The step in which the control device 3 sends an open / close signal to the drain solenoid valve 13 is: (STEP 5-2) If the measurement results received from 1 or more water quality detection sensors 20 all meet the predetermined water quality standards, (STEP 5-2-1) A step of sending a closing signal to the drain electromagnetic valve 13 to command the supply of water, Includes.
[0068] In other words, the rainwater drinking water purification system 1 according to the present invention can supply rainwater that meets all predetermined water quality standards to a filtration device 7 and a UV sterilization device 9 to obtain drinking water.
[0069] In the rainwater drinking water method according to the present invention, (STEP 5) The step in which the control device 3 sends an open / close signal to the drain solenoid valve 13 is: (STEP 5-2) If the measurement results received from 1 or more water quality detection sensors 20 all meet the predetermined water quality standards, (STEP 5-2-2) A step of sending an ON signal to command the predetermined water quality indicator lamp 51 to light up, It may also include the following.
[0070] As described above, the rainwater drinking water purification device 1 according to the present invention can easily visualize that the water quality of the rainwater collected in the reservoir tank 5 is high by lighting up a blue LED lamp 51, for example, as shown in Figures 4(a) and (b), when the rainwater collected in the reservoir tank 5 meets predetermined water quality standards.
[0071] The rainwater drinking water purification device and its purification method of the present invention have been described above, but the present invention is not limited to the above embodiments and examples.
[0072] Furthermore, the present invention can be implemented in various forms with improvements, modifications, and changes based on the knowledge of those skilled in the art, without departing from its spirit. [Industrial applicability]
[0073] The rainwater drinking water purification system according to the present invention is generally used to purify rainwater to obtain drinking water, and can also be used, for example, in the event of a disaster, by transporting and installing it in evacuation centers such as gymnasiums and community centers to obtain drinking water from rainwater. [Explanation of symbols]
[0074] 1: Rainwater drinking water purification device according to the present invention 2: Housing 3: Control device 5: Reservoir Tank 51: Water quality indicator lamp (LED lamp) 7:Filtration device 71: Activated carbon filter 72: Connecting pipe 73: Microfiltration membrane (MF membrane) 9: Ultraviolet sterilizer (UV sterilizer) 10: Water receiving pipe 12: 1st water pipe 13: Drain solenoid valve 14:Second water pipe 20: Water quality detection sensor 22: Electrical conductivity sensor (EC sensor) 24: pH sensor
Claims
1. (1-1) A reservoir tank that receives rainwater collected via a water receiving pipe, (1-2) A filtration device including a microfiltration membrane that is connected to the reservoir tank by a first water supply pipe equipped with a drain solenoid valve, and filters the water received from the reservoir tank via the first water supply pipe to remove fine, insoluble solid particles, (1-3) A UV sterilization device (hereinafter also referred to as "UV sterilization device") is connected to the precision filtration membrane of the filtration device by a second water supply pipe, and sterilizes the water received from the filtration device via the second water supply pipe with ultraviolet light (hereinafter also referred to as "UV light") to eliminate bacteria, (1-4) A control device that can communicate with the drain solenoid valve provided in the first water supply pipe and sends an open / close signal to it, (1-5) The water receiving pipe or the reservoir tank is equipped with one or more water quality detection sensors for measuring the water quality of the rainwater. (1-6) The one or more water quality detection sensors transmit their respective measurement results to the control device, and the control device analyzes the measurement results and sends an open / close signal to the drain solenoid valve. (1-7) If at least one of the analyzed measurement results does not meet the predetermined water quality standard, an open signal is sent to the drain electromagnetic valve to command drainage. (1-8) If all measurement results meet the predetermined water quality standards, a close signal is sent to the drain solenoid valve to command the supply of water. (1-9) A rainwater drinking water purification system, (2-1) The rainwater that does not meet the prescribed water quality standards is drained by the drain electromagnetic valve which has entered the "open state" upon receiving the open signal, thereby removing dissolved pollutants. (2-2) When the rainwater that meets the specified water quality standards is received, the drain solenoid valve that has received the closing signal enters the "closed state", and the filtration device receives the water via the first water supply pipe. (2-3) The rainwater is purified by filtering and sterilizing the insoluble solids (fine particles) and bacteria, respectively, using the filtration device and the UV sterilization device. (3) A rainwater drinking water purification system that removes insoluble solids (fine particles) and dissolved contaminants from rainwater collected in the reservoir tank and provides sterilized drinking water.
2. The reservoir tank is equipped with one or more water quality indicator lamps that can communicate with the control device, The control device analyzes the measurement results received from the one or more water quality detection sensors. The rainwater drinking water purification device according to claim 1, wherein, depending on whether each measurement result meets or does not meet a predetermined water quality standard, an on / off signal is sent to a water quality indicator lamp corresponding to the water quality detection sensor that transmitted the measurement result, thereby visualizing the water quality in an easy-to-understand manner.
3. The rainwater drinking water purification device according to claim 1 or claim 2, wherein the water quality detection sensor is an electrical conductivity sensor for measuring electrical conductivity (hereinafter also referred to as "EC") and / or a pH sensor for measuring acidity / alkalinity (hereinafter also referred to as "pH").
4. The aforementioned filtration device is A filtration device in which an activated carbon filter and the aforementioned precision filtration membrane are connected by a connecting tube, The first water supply pipe is connected to the activated carbon filter, The second water supply pipe is connected to the precision filtration membrane. The rainwater drinking water purification device according to claim 1.
5. (1) A rainwater drinking water purification device comprising a reservoir tank connected to a water receiving pipe, a filtration device connected to the reservoir tank by a first water supply pipe equipped with a drain solenoid valve, and a UV sterilization device connected to the filtration device by a second water supply pipe, wherein the water receiving pipe or the reservoir tank is equipped with one or more water quality detection sensors for measuring the water quality of rainwater, (2) A step of preparing a control device that can communicate with the one or more water quality detection sensors and the drain solenoid valve and sends an open / close signal to them, (3) The step of the reservoir tank receiving the collected rainwater via the receiving pipe, (4) The one or more water quality detection sensors measure the water quality of the rainwater and transmit the respective measurement results to the control device, (5) The control device analyzes the measurement results and sends an open / close signal to the drain solenoid valve of the first water supply pipe, Includes, The step (5) in which the control device sends an open / close signal to the drain solenoid valve is, (5-1) If any one of the measurement results received from the one or more water quality detection sensors does not meet the predetermined water quality standard, (5-1-1) A step of sending an open signal to the drain electromagnetic valve to command drainage, Includes, (5-2) If the measurement results received from the one or more water quality detection sensors all meet the predetermined water quality standards, (5-2-1) A step of sending a closing signal to the drain electromagnetic valve to command the supply of water, This is a method for making rainwater drinkable, (6) The drain electromagnetic valve that has received the opening / closing signal opens and closes its valve to discharge rainwater that has flowed in from the reservoir tank or to send water to the filtration device via the first water supply pipe, （６－１） The rainwater that does not meet the specified water quality standards is drained by the drain solenoid valve, which has entered the "open state" upon receiving an open signal, thereby removing dissolved pollutants. （６－２） The rainwater that meets the predetermined water quality standards is sent to the filtration device via the first water supply pipe after the drain solenoid valve, which has received a closing signal, enters a "closed state" upon receiving the closing signal. A step that selectively executes one of the following steps, (7) The filtration device filters the rainwater received through the first water supply pipe to remove insoluble solids (fine particles), (8) The UV sterilization device sterilizes the rainwater received from the filtration device via the second water supply pipe using ultraviolet light to eliminate bacteria, (9) The step of taking drinking water from the UV sterilization device, A method for making rainwater drinkable, comprising (10), which removes insoluble solids (fine particles) and dissolved contaminants from rainwater collected in the reservoir tank and provides sterilized drinking water.
6. In the step of preparing the rainwater drinking water purification device, the reservoir tank is equipped with one or more water quality indicator lamps, each corresponding to one or more water quality detection sensors and capable of communicating with the control device, (5) The step of the control device sending an open / close signal to the drain solenoid valve is: (5-1) If any one of the measurement results received from the one or more water quality detection sensors does not meet the predetermined water quality standard, (5-1-2) A step of sending an ON signal to the water quality indicator lamp corresponding to the water quality detection sensor that has transmitted a measurement result that does not meet the predetermined water quality standard, The method for making rainwater drinkable according to claim 5, further comprising:
7. In the step of preparing the rainwater drinking water purification device, the reservoir tank is equipped with one or more water quality indicator lamps, each corresponding to one or more water quality detection sensors and capable of communicating with the control device, (5) The step of the control device sending an open / close signal to the drain solenoid valve is: (5-2) If the measurement results received from the one or more water quality detection sensors all meet the predetermined water quality standards, (5-2-2) A step of transmitting an ON signal to command a predetermined water quality indicator lamp to light up, The method for making rainwater drinkable according to claim 5, further comprising: