JP5436813B2 - Water purification system - Google Patents

Description

  The present invention relates to an apparatus for improving water quality such as well water, river water or rainwater.

In order to use water and rainwater pumped from water sources such as wells and rivers as washing and bath water, or to spray water for plant cultivation, water quality improvement devices that purify these waters have been proposed. (For example, see Patent Document 1)
By the way, the conventional water quality improving device is configured to improve the quality of water stored in the tank, and when the water in the tank is reduced, unpurified water is additionally supplied to the tank. For this reason, when trying to use purified water, it is necessary to wait for the entire water in the tank to be purified, and while the water in the tank is being purified, water cannot be taken out or water that has not been purified. There was a case that had to be used.

On the other hand, the market demands a water purification system in which purified water can be used at any time.
Japanese Patent Application No. 2006-208556

  A conventional water quality improvement device has a water tank for storing raw water such as water drawn from water sources such as wells, rivers or ponds, or rain water, and purifies the water by circulating the raw water in the water tank. The raw water and the purified water are stored in the same reservoir. For this reason, when the water in the water tank is reduced and raw water is supplied to the water tank, the raw water that has not been purified is stored in the water tank for a while (until purification is completed). It is mixed. For this reason, the water pumped out cannot be said to be purified water until the water in the water tank has been purified. Therefore, there is a problem that the time for pumping purified water is limited.

In addition, when raw water is additionally supplied to the water tank, not only the additionally supplied raw water but also the purified water that has already been collected is circulated for purification treatment, which has a problem of poor purification efficiency. .
Furthermore, water storage tanks are usually placed in locations that are well exposed to sunlight outdoors, and when raw water is supplied to the water storage tank, the water quality deteriorates quickly, so even if water purification is carried out, its efficiency There was a problem of being bad.

Furthermore, when the water storage tank and the water purification device are located at a distance from each other and are connected by a pipe or the like, there is a problem that the purification efficiency is lowered.
This invention was made in order to solve such a subject, and it aims at providing the water quality purification system with high purification efficiency.
Another object of the present invention is to provide a water purification system that can always pump out purified water.

  Another object of the present invention is to provide a water purification system capable of constantly pumping water suitable for beverages.

In order to solve the above-mentioned problem, the invention described in claim 1 is characterized in that a primary water tank that stores water or rain water from a water source such as a well, a river, or a pond as raw water, and the raw water in the primary water tank is electrically connected. A water quality improvement device for purifying by hypochlorous acid generated by mixing of generated ozone or by electrolysis of the raw water, and raw water in the primary water tank is purified by the water quality improvement device and returned to the primary water tank. A secondary water tank that stores the purified water that has been circulated and purified and purified by the water quality improvement device, a pump for transferring the purified water in the primary water tank to the secondary water tank, the primary water tank, and the water provided between the secondary reservoir, a filter device for filtering the purified water that is purified in the water quality improvement device as drinking water, the water quality improvement device is driven for a predetermined time raw water of the primary water tank is循 After being been purified, the a water purification system, characterized in that and a control means for driving the pump in order to transfer the purified water in the primary water tank to the secondary reservoir.

The invention described in claim 2 further includes control means for stopping or substantially stopping the driving of the pump during the supply of the raw water to the primary water tank and the purification of the raw water in the primary water tank. The water purification system according to claim 1, wherein:
The basic configuration of the present invention is a primary water storage tank that stores water or rainwater drawn from a water source such as a well, river or pond as raw water, and water quality improvement for circulating and purifying the raw water in the primary water storage tank. And a secondary water tank for storing purified water purified in the primary water tank.

The primary water tank is preferably installed in a place where the ambient temperature is lower than that of the secondary water tank.
The water storage capacity of the secondary water tank is larger than the water storage capacity of the primary water tank.
This invention is good also as a structure by which the said primary water tank is arrange | positioned in the said secondary water tank.
Furthermore, it is good also as a structure containing the other water quality improvement apparatus for circulating and purifying the purified water in the said secondary water tank.

  According to the invention described in claim 1, since the primary water tank for storing and purifying the raw water and the secondary water tank for storing the purified water are provided, the problem that the raw water is mixed with the purified water can be solved. . Moreover, since the raw water stored in the primary water tank can be intensively purified, the purification efficiency is improved. Further, a filter device is provided between the primary water tank and the secondary water tank to make the purified water sent from the primary water tank to the secondary water tank further suitable for beverages. Therefore, the purified water stored in the secondary water tank can be used as drinking water. As the filter device provided between the primary water storage tank and the secondary water storage tank, for example, a UF filter can be used. The UF filter is equipped with a UF (Urtra Filtlation) membrane, and the pore size of the membrane is about 2 to 200 nm, so that it can capture and remove bacteria and viruses, making the water suitable for beverages. be able to.

Furthermore, since this invention is equipped with a pump for transferring the purified water purified in the primary water tank to the secondary water tank, variations in the installation status of the primary water tank and the secondary water tank can be expanded. . In addition, the primary water tank can be placed near the water quality improvement device regardless of the location of the secondary water tank, and the purification capacity of the water quality improvement device can be efficiently improved against the raw water stored in the primary water tank. It can be demonstrated.

Since the water is not transferred from the primary water tank to the secondary water tank until a predetermined time, that is, the time necessary for completely purifying the raw water in the primary water tank has passed, The tank is not mixed with raw water being purified.
According to invention of Claim 2, it can prevent that the raw water in the middle of purification | mixing is mixed with a secondary water tank.

Using the basic configuration of the present invention provides a primary water tank for storing and purifying raw water and a secondary water tank for storing purified water, thus solving the problem of mixing raw water with purified water. it can. Moreover, since the raw water stored in the primary water tank can be intensively purified, the purification efficiency is improved.
The primary water tank is preferably placed in a place with a low temperature such as a shade, indoors, and the quality of the raw water stored in the primary water tank can be prevented from deteriorating and the purification efficiency can be improved.

Even if the secondary water tank is placed in a place where it is easy to pump out purified water using gravity, such as on the roof, the water in the secondary water tank is pure water, and the water temperature is high due to sunlight. Even so, the water quality is unlikely to deteriorate.
By setting the primary water tank to a relatively small capacity, a small amount of raw water can be purified efficiently. And by making the secondary water tank relatively large in capacity, every time raw water is purified in the primary water tank, the purified water is transferred to the secondary water tank, improving the purification efficiency and the secondary water storage tank. A large amount of clean water can always be secured in the tank. Therefore, even when a large amount of purified water is required, the purified water can be pumped at any time, and the system can respond to the demands of consumers.

The primary water tank may be placed in the secondary water tank. If it carries out like this, the structure of a water quality purification system can be simplified, and it can be set as the system which is easy to install. In addition, the primary water tank is surrounded by the secondary water tank, and the primary water tank is always cooled with the purified water stored in the secondary water tank, so the temperature of the raw water in the primary water tank rises. Can be suppressed.
In addition, for example, if a configuration that controls the flow of water in the primary and secondary reservoirs using a three-way valve is adopted, the water purification device in the secondary reservoir can also be circulated through the water quality improvement device. For example, when the purified water in the tank has passed for several days, the purified water in the secondary water tank can be sterilized again to purify it.

  Further, another water quality improvement device for circulating and purifying the purified water in the secondary water tank, that is, a water quality improvement device different from the water quality improvement device of claim 1 may be added. Then, when breeding of germs and the like occurs over time in the purified water stored in the secondary water tank, the water can be purified again in a relatively short time by using the water quality improvement device. Therefore, even if the installation location of the secondary water tank is high temperature or the purified water stored in the secondary water storage tank is not used for a long time, the stored water is repurified and used well. It can be a water quality improvement system that can.

  As described above, according to the present invention, it is possible to provide a water quality improvement system that has high purification efficiency and can always pump purified water from the secondary water tank.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the following embodiments, water or rainwater drawn from a water source such as a well, river, or pond whose water quality is improved by the water quality improvement device is referred to as “raw water”. Then, the raw water whose water quality has been improved and purified is referred to as “purified water”.
FIG. 1 is a block diagram for explaining the configuration of a water purification system 1 according to an embodiment of the present invention.

  Referring to FIG. 1, the water purification system 1 circulates and purifies a primary water tank 2 for storing raw water, a secondary water tank 3 for storing purified water, and raw water in the primary water tank 2. And a water quality improvement device 4 for the purpose. The raw water in the primary water tank 2 is pumped out through the pipe 5, the water quality is improved by the water quality improvement device 4, and returned to the primary water tank 2 through the pipe 6. The water quality improvement device 4 includes a control unit 7, an ozone generator / mixer 8, a circulation pump 9, and a pressure sensor 10. In this embodiment, the pressure sensor 10 may be omitted and is not used for a control operation described later. When the circulation pump 9 is driven by the control unit 7, the raw water in the primary water tank 2 is pumped through the pipe 5. Then, when the ozone generator / mixer 8 is operated by the control unit 7, ozone is mixed with the pumped raw water, and the raw water is purified by the sterilizing power of ozone or the like. The purified raw water is returned to the primary water tank 2 through the pipe 6, and the raw water in the primary water tank 2 is all circulated, whereby the raw water is purified and becomes purified water.

  A pipe 11 is connected between the primary water tank 2 and the secondary water tank 3. A transfer pump 12 and a pressure sensor 13 are inserted into the pipe 11. Therefore, when the transfer pump 12 is driven, the purified water purified in the primary water tank 2 can be supplied to the secondary water tank 3 through the pipe 11. The secondary water tank 3 is provided with a ball tap 14 for detecting that the purified water stored is at the full water level. The ball tap 14 is also referred to as a “float valve”, and controls the water level by opening and closing the supply port using the float buoyancy. That is, when the ball tap 14 is moved up and down by the level of purified water stored in the secondary water tank 3 and the ball tap 14 is in the upper position, the spout is closed from the pipe 11 to the second water tank 3, and the pressure sensor 13 is turned on. Detects high pressure. On the other hand, when the water level in the secondary water tank 3 is low and the ball tap 14 is in the lower position, the spout from the pipe 11 to the second water tank 3 is opened, and the pressure sensor 13 detects the pressure “low”. The output of the pressure sensor 13 is given to the control unit 7.

  One end of a supply pipe 15 is connected to the primary water tank 2, and the other end of the supply pipe 15 is immersed in, for example, raw water of a well. A pumping pump 16 is inserted into the supply pipe 15. When the pumping pump 16 is driven, raw water is pumped from the well, and the raw water is stored in the primary water tank 2 through the supply pipe 15. The raw water may be supplied from a river, a pond, a rainwater storage tank or the like instead of a well. The primary water tank 2 is provided with a water level sensor 17 for detecting the water level of the accumulated water. In this embodiment, the water level sensor 17 can detect two water levels: a predetermined low water level WL indicated by a solid line and a predetermined high water level (full water level) WH indicated by a broken line.

Further, a pipe 18 for taking out purified water into the house 20 is connected to the secondary water tank 3, for example.
In this embodiment, the control unit 7 provided in the water quality improvement device 4 controls the circulation pump 9 and the ozone generator / mixer 8 of the water quality improvement device 4 and also controls the drive of the transfer pump 12. On the other hand, the pumping pump 16 is operated according to the output of the water level sensor 17.

  In the block diagram of FIG. 1, the primary water tank 2 and the water quality improvement device 4 are described as being provided outside the house 20. However, the primary water tank 2 and the water quality improvement device 4 are installed in the house 20. Or installed under the eaves of the house 20 or the like. That is, it is preferable to place the primary water tank 2 in a place where the temperature is relatively low, such as in the shade or indoors. Thereby, it is possible to prevent the quality of the raw water stored in the primary water tank 2 from deteriorating and improve the purification efficiency. On the other hand, it is preferable that the secondary water storage tank 3 is provided in a place such as on the roof of the house 20 or disposed at a relatively high position so that purified water can be pumped out by gravity through the pipe 18. In addition, the water in the secondary water tank 3 is purified water, and even if the water temperature increases due to sunlight, the water quality is unlikely to deteriorate.

FIG. 2 shows the water purification system 100 according to the embodiment of the present invention, and is a diagram showing a more specific external configuration.
In the configuration of FIG. 2, the same or corresponding parts as those in the configuration of FIG.
2A is a plan view of the water purification system 100, and FIG. 2B is a front view of the water purification system 100. FIG.

With reference to FIG. 2, the water purification system 100 circulates and purifies the primary water tank 2 for storing raw water, the secondary water tank 3 for storing purified water, and the raw water in the primary water tank 2. And a water quality improvement device 4 for the purpose.
The primary water tank 2 is a tank having an internal volume of, for example, 100 liters, and raw water is stored through a supply pipe (not shown). The raw water in the primary water tank 2 is pumped out through the pipe 5, the water quality is improved by the water quality improvement device 4, and returned to the primary water tank 2 through the pipe 6.

  The water quality improvement device 4 includes a control unit 7, an ozone generator / mixer 8, a first filter 24 and a second filter 25, and a built-in circulation pump 9. When the circulation pump 9 is driven by the control unit 7, the raw water in the primary water tank 2 is pumped through the pipe 5. The water supplied from the pipe 5 to the water quality improvement device 4 is first filtered through the first filter 24 and further filtered through the second filter 25. The first filter 24 is, for example, a sand filter, and mainly removes manganese components and iron contained in the raw water. The second filter 25 is, for example, an activated carbon filter, and mainly adsorbs and removes odor components and germs components in the raw water.

  The water filtered by the first filter 24 and the second filter 25 is supplied to the ozone generator / mixer 8. Ozone is mixed with water supplied to the ozone generator / mixer 8 by operating the ozone generator / mixer 8 by the controller 7. More specifically, fine bubbles containing ozone are mixed with water. Since ozone has a strong sterilizing power, when fine bubbles containing ozone are mixed in water, sterilization of water is performed by ozone, and odor components and the like are oxidized. In this way, the raw water is purified by the sterilizing power of ozone or the like. The purified raw water is returned to the primary water tank 2 through the pipe 6, and the raw water in the primary water tank 2 is all circulated, whereby the raw water is purified and becomes purified water.

As described above, the water quality improvement apparatus 4 includes the ozone generator / mixer 8 that is electrically operated by the control unit 7, and the raw water is purified by the electrically generated ozone. Moreover, the 1st filter 24 and the 2nd filter 25 for filtering raw | natural water before the purification | cleaning by ozone are provided.
A pipe 11 is connected between the primary water tank 2 and the secondary water tank 3. A transfer pump 12 is inserted into the pipe 11. Therefore, when the transfer pump 12 is driven, the purified water purified in the primary water tank 2 can be supplied to the secondary water tank 3 through the pipe 11.

  The transfer pump 12 transfers the purified water in the primary water tank 2 to the secondary water tank 3 after the water quality improvement device 4 is driven for a predetermined time and all the raw water in the primary water tank 2 is purified to become purified water. To be driven. The driving of the transfer pump 12 is controlled by the control unit 7 of the water quality improvement device 4. Thereby, operation | movement of the water quality improvement apparatus 4 and operation | movement of the transfer pump 12 can be made into predetermined correspondence. Specifically, the transfer pump 12 is not driven while the raw water is supplied to the primary water tank 2. The drive of the transfer pump 12 can be controlled such that the transfer pump 12 is not driven while the raw water in the primary water tank 2 is being purified by the water quality improvement device 4. And thereby, it can prevent that the water which is not purified water is supplied in the secondary water tank 3 by the transfer pump 12. FIG.

In this embodiment, the secondary water tank 3 is a tank having an internal volume of 800 to 1000 liters, for example.
About another structure, it is equivalent to the structure of the water purification system 1 demonstrated with reference to FIG.
FIG. 3 is a block diagram for explaining the configuration of a water purification system 41 according to another embodiment of the present invention. The structure of the water purification system 41 shown in FIG. 3 has many parts in common with the water quality improvement system 1 shown in FIG. 1, and the same or corresponding parts as those in the structure shown in FIG.

  The feature of the water purification system 41 shown in FIG. 3 is that the UF filter device 19 is inserted into the pipe 11 connecting the primary water tank 2 and the secondary water tank 3. More specifically, a UF filter device 19 is inserted into the pipe 11 through which the purified water transferred by the transfer pump 12 passes. Therefore, the purified water given to the secondary water tank 3 becomes water filtered by the UF filter device 19.

Other configurations are the same as those in FIG.
The UF filter device 19 has a UF (Urtra Filtlation) membrane, and the membrane is provided with innumerable holes having a minute diameter (about 2 to 200 nm). The UF membrane is made of, for example, polyvinyl chloride PVC, cellulose acetate CA, polyethersulfone PES, polyacrylonitrile PAN, or the like. The membrane module structure of the UF membrane includes a hollow fiber type, a sheet type, a spiral type, a tubular type, and a rotary closed membrane type. When the purified water is filtered through a UF membrane, extremely fine foreign matters such as sterilization and viruses are captured by the action of the minute pore diameter. Therefore, the germs and viruses remaining in the purified water are removed, and the water stored in the secondary water storage tank 3 is water suitable for drinking.

  By the way, the UF filter device 19 has a drawback that the filtration rate of water is slow because the pore size of the UF membrane is very small. For this reason, if a UF filter device is provided immediately before the water supply channel to be pumped by the user, in order to pump out water only slowly or to pump out a certain amount of water, the filtration area is large. There was a problem that an expensive UF filter device had to be used.

  On the other hand, according to the configuration of FIG. 3, the UF filter device 19 is provided in the clean water transfer pipe 11 transferred from the primary water tank 2 to the secondary water tank 3. Even if the speed is low, the water stored in the secondary water tank 3 is suitable for drinking after the filtration, so that the user can draw the drinking water from the secondary water tank 3 through the pipe 18 when necessary. Can do.

FIG. 4 shows an example of the configuration of the UF filter device 19. A UF filter device 19 shown in FIG. 4 is a configuration example of a UF filter device in which a hollow fiber membrane module is incorporated.
5 and 6 are flowcharts for explaining the control operation of the water purification system 1, 100 or 41 shown in any of FIGS.
First, the operation of the pumping pump 16 will be described with reference to FIG. The pumping pump 16 is operated independently. That is, the pumping pump 16 is turned on and off in response to the detection output of the water level sensor 17 in the primary water tank 2. When the pumping pump 16 is turned on, the pumping pump 16 determines the signal of the water level sensor 17. If the water level sensor 17 outputs a predetermined low water level WL signal (YES in step S1), the pumping pump 16 is turned on, pumps raw water from the water source through the supply pipe 15, and supplies it to the primary water tank 2. (Step S2)
When the water level sensor 17 does not output a low water level WL signal, it is determined whether or not a predetermined full water level WH signal is output (step S3). If the water level sensor 17 does not output the full water level WH signal, the process returns as it is, so that the pumping pump 16 continues to operate while being turned on in step S2.

When the water level sensor 17 detects the full water level and issues a WH signal, YES is determined in step S3, and the pumping pump 16 is stopped (step S4).
In this way, the pumping pump 16 operates independently based on the detection signal of the water level sensor 17, stops operation when the primary water tank 2 reaches the full water level WH, and the water level of the primary water tank 2 gradually decreases. When the water level decreases to the low water level WL, the pumping of the raw water is started, and the pumping operation is stopped when the primary water tank 2 reaches the full water level WH.

FIG. 6 is a flowchart of the water quality improvement control executed by the control unit 7 of the water purification device 4, 100 or 41.
In the water quality improvement control, first, the operation of the transfer pump 12 is stopped (step S11). Since the water quality improvement control is performed when the water in the primary water tank 2 is not completely purified, first, water that has not been purified is not transferred to the secondary water tank 3. The operation of the transfer pump 12 is stopped.

Then, the operation of the circulation pump 9 is started and the water in the primary water tank 2 is circulated through the pipes 5 and 6 and the ozone generator / mixer 8 is operated to mix ozone with the circulated water. (Step S12). Thereby, the circulated water is purified and sterilized by ozone.
Next, it is determined whether or not the pumping pump 16 is in operation (step S13). While the pumping pump 16 is in operation, the processes of steps S12 to S13 are repeated.

As described above, the pumping pump 16 stops operation when the primary water tank 2 reaches the full water level WH.
When the control unit 7 determines that the pumping pump 16 is stopped (NO in step S13), the control unit 7 sets a time required to purify the raw water filled in the primary water tank 2, and starts a timer (step S14). ). The time counted by the timer is, for example, 4 hours. While the timer is counting, the circulating pump 9 is continuously operated, and the ozone generator / mixer 8 is operated to purify and sterilize the circulated water with ozone (step S15). During this time, the operation of the transfer pump 12 remains stopped.

The water in the primary water tank 2 is circulated for a time determined by the timer and purified by ozone, so that the raw water filled in the primary water tank 2 is completely purified to become purified water. Therefore, when the timer expires (YES in step S16), the circulation pump 9 is stopped and the operation of the ozone generator / mixer 8 is stopped (step S17).
At this time, the primary water tank 2 is filled with purified water.

Then, in the control part 7, the pressure of the pressure sensor 13 with which the transfer pump 12 was equipped is detected (step S18), and if the pressure of the pressure sensor 13 is low, the transfer pump 12 will be drive | operated and water purification of the primary water tank 2 will be carried out. Transfer to the secondary water tank 3. On the other hand, when the pressure of the pressure sensor 13 is high, that is, in the secondary water tank 3, when the ball tap 14 is in the upper position and the purified water supply port to the secondary water tank 3 is closed and the water pressure in the pipe 11 is high, The operation of the transfer pump 12 is stopped (step S20).

Thereby, the inside of the secondary water tank 3 is maintained in a state where purified water is almost full.
And if a user draws the purified water of the secondary water tank 3 from the piping 18, and the purified water in the secondary water tank 3 decreases, the transfer pump 12 will be operated according to it and the purified water will always be in the secondary water tank 3. It is filled.
This operation / stop control of the transfer pump 12 is continued until the operation of the pumping pump 16 is started next (step S21). That is, the purified water purified in the primary water tank 2 is supplied to the secondary water tank 3 at any time, and is performed until the water level in the primary water tank 2 becomes the low water level WL.

  By the way, in the embodiment shown in FIGS. 1 to 3, if the capacity of the primary water tank 2 is made smaller than the capacity of the secondary water tank 3, a relatively small volume of raw water is supplied to the primary water tank 2. The raw water in the primary water tank 2 can be purified in a relatively short time by filling and circulating the raw water. Therefore, there is an advantage that the purification efficiency is good. On the other hand, if the capacity | capacitance of the 2nd water storage tank 3 is set as the capacity | capacitance which can store the purified water required and sufficient for using in the house 20, a user can take out purified water at any time, and it becomes a convenient water quality improvement system.

FIG. 7 is a block diagram showing a configuration of a water purification system 21 according to still another embodiment of the present invention. A feature of the water purification system 21 shown in FIG. 7 is that the primary water tank 2 is arranged in the secondary water tank 3. That is, the primary water tank 2 is a relatively small-capacity water tank and is disposed in the relatively large-capacity secondary water tank 3.
The primary water tank 2 is supplied with raw water pumped from, for example, a well by a pumping pump 16 through a supply pipe 15. The raw water in the primary water tank 2 is taken out via the pipe 5 and circulated so as to return to the primary water tank 2 through the water quality improvement device 4, the pipe 6, the three-way valve 22 and the pipe 61. The water quality improvement device 4 includes a control unit 7, an ozone generator / mixer 8, a circulation pump 9, and a pressure sensor 10 for detecting the pressure of the pipe 6.

Further, the primary water tank 2 is provided with a water level sensor 17 capable of detecting the full water level WH and the predetermined low water level WL, and the secondary water tank 3 has the secondary water tank 3 at the full water level. The provision of the ball tap 14 that closes the supply port when the contact is made is equivalent to the configuration of the embodiment shown in FIG.
A feature of the embodiment shown in FIG. 7 is that instead of the transfer pump 12, the pressure sensor 13 and the pipe 11, a three-way valve 22 and a pipe 62 connected to the three-way valve 22 are provided, and the circulation pump 9 also serves as a transfer pump. It is that you are.

That is, the raw water is stored in the primary water tank 2 up to, for example, the full water level WH, and when the raw water in the primary water tank 2 is circulated and purified, the three-way valve 22 has b-c open, and the circulation pump By driving 9, the raw water in the primary water tank 2 is circulated and purified.
When the raw water in the primary water tank 2 is purified to become purified water, the three-way valve 22 is switched to open ba. When the circulation pump 9 is driven, the purified water purified in the primary water tank 2 is pumped through the pipe 5 and transferred to the secondary water tank 3 through the pipe 6, the three-way valve 22 and the pipe 62. The And when the full water of the secondary water tank 3 is detected by the ball tap 14, the pressure sensor 10 of the circulation pump 9 detects it, and the transfer of the purified water to the secondary water tank 3 is stopped.

In the water purification system 21 shown in FIG. 7 as well, the UF filter device 19 may be inserted into the pipe 62 in order to make the purified water stored in the secondary water tank 3 suitable for drinking.
Next, details of the control operation of the embodiment shown in FIG. 7 will be described based on a flowchart.
Also in the configuration of FIG. 7, the pumping pump 16 operates independently based on the detected water level of the water level sensor 17 provided in the primary water tank 2. The operation of the pumping pump 16 is as shown in the flowchart described in FIG.

  FIG. 8 shows a flowchart of water quality improvement control in the configuration of FIG. In the water quality improvement control, the control unit 7 opens bc of the three-way valve 22 (step S31). Then, the circulation pump 9 is operated, and the ozone generator / mixer 8 is operated (step S32). Thus, the raw water in the primary water tank 2 is circulated through the pipe 5, the circulation pump 9, the ozone generator / mixer 8, the pipe 6, the three-way valve 22 and the pipe 61 and purified by ozone.

During circulation, it is determined whether or not the pumping pump 16 is operating (step S33). When the pumping pump 16 is turned off, the control unit 7 starts a timer (step S34). This timer is a timer for measuring the time (for example, 4 hours) required to purify the raw water in the primary water tank 2 that has become full.
When it is determined that the timer has expired (YES in step S35), the raw water in the primary water tank 2 has been completely purified to become purified water, so that the operation of the ozone generator / mixer 8 is stopped, and the three-way valve 22 is Switching is performed so that ab is opened (step S36).

  Thereby, the purified water in the primary water tank 2 can be supplied to the secondary water tank 3 through the pipe 5, the circulation pump 9, the pipe 6, the three-way valve 22 and the pipe 62. Since the ball tap 14 is provided at the supply port from the pipe 62 to the secondary water tank 3, the supply port is not blocked by the ball tap 14 unless the secondary water tank 3 is full. The pressure of the pressure sensor 10 is determined to be low, and the circulation pump 9 is driven (step S37 → S38). On the other hand, if the pressure of the pressure sensor 10 is determined to be high, the secondary water tank 3 is full, so the circulation pump 9 is stopped (step S39).

And whenever the purified water of the secondary water tank 3 is taken out by the house 20 via the piping 18, the purified water purified by the primary water tank 2 is supplied to the secondary water tank 3, and the secondary water tank 3 is It is always maintained in a state where almost full water is stored.
When the water level of the primary water tank 2 becomes the low water level WL, the pumping pump 16 operates to start supplying raw water to the primary water tank 2, so that the water quality improvement control is stopped.

  FIG. 9 is a block diagram showing a configuration of a water purification system 31 according to a modification of the water purification system 21 shown in FIG. Compared with the configuration of FIG. 7, the water purification system 31 shown in FIG. 9 has three-way valves 32 and 33 added so that the water in the secondary water tank 3 can also be circulated via the water quality improvement device 4. It has become. The merit of having such a configuration is that the occurrence of various germs expected when the purified water in the secondary water tank 3 is left for several days can be sterilized by circulating the water in the secondary water tank 3. It is.

As a specific configuration, a three-way valve 32 is inserted in the pipe 5 taken out from the primary water tank 2, and its inlet / outlet ab is connected to the pipe 5, and the inlet c is connected to the secondary water storage by the pipe 51. It communicates with the tank 3. The three-way valve 33 has an inlet / outlet ab connected to the pipe 6, and an outlet c connected to the secondary water tank 3 through a pipe 63.
Also in the water quality purification system 31 shown in FIG. 9, the pumping pump 16 is independently operated based on the detected water level of the water level sensor 17 of the primary water tank 2.

  On the other hand, the water quality improvement control of the water purification system 31 is performed as shown in the flowchart of FIG. Referring to FIG. 10, in the water quality improvement control, first, a-b of three-way valve 32 is opened, a-b of three-way valve 33 is opened, and bc of three-way valve 22 is opened (step S41). ). Thereby, the water in the first water tank 2 can be circulated. Then, the circulation pump 9 is operated, and the ozone generator / mixer 8 is operated (step S42). In this state, it is determined whether or not the pumping pump 16 is operating (step S43). When the operation of the pumping pump 16 is stopped, the control unit 7 starts a timer (step S44). This timer is a timer that measures the time required to circulate the raw water filled in the first water tank 2 to obtain purified water, for example, a 4-hour timer. When the timer expires (YES in step S45), the raw water filled in the primary water tank 2 is purified and becomes purified water.

Next, it is determined whether or not the purified water stored in the secondary water tank 3 is water that has passed for a certain period (for example, 2 to 3 days). This determination can be made, for example, based on whether or not a certain period (2 to 3 days) has elapsed since the previous purification of the water in the primary water tank 2.
In step S46, if the purified water in the secondary water tank 3 has not passed for a certain period after purification, a three-way valve is used to transfer the purified water filled in the primary water tank 2 to the secondary water tank 3. The a-b of 32 is opened, the a-b of the three-way valve 33 is opened, the a-b of the three-way valve 22 is opened, and the operation of the ozone generator / mixer 8 is stopped (step S47).

  And the outlet pressure of the piping 62 controlled according to the ball tap 14 of the secondary water tank 3 is detected by the pressure sensor 10 (step S48), and if the pressure is low, the circulation pump 9 is operated (step S49), The purified water purified in the primary water tank 2 is transferred to the secondary water tank 3. If the pressure detected by the pressure sensor 10 is increased, the purified water in the secondary water tank 3 is full, and the circulation pump 9 is stopped (step S50).

This operation is performed in response to the use of the purified water in the secondary water tank 3, and this control is repeated until the pumping pump 16 starts operation (step S51).
On the other hand, when it is determined in step S46 that the purified water in the secondary water tank 3 has passed a certain period (2 to 3 days) after purification, a three-way valve is used to circulate the purified water in the secondary water tank 3. 32 is opened by bc, and the three-way valve 33 is opened by bc. At this time, the three-way valve 22 may be in any switching state. For example, as in step S47, the a-b is opened. Then, the ozone generator / mixer 8 is operated (step S52), the circulation pump 9 is operated (step S53), the water in the secondary water tank 3 is circulated, and it may have been allowed to breed for a certain period of time. Bacteria that cannot be sterilized and sterilized.

In this embodiment, the operations of steps S52 and 53 are performed until the pumping pump 16 is operated. However, the operation is performed for a predetermined time (for example, about 2 to 6 hours) regardless of the operation of the pumping pump 16. It may be.
FIG. 11 is a block diagram showing a configuration of a water purification system 42 according to still another embodiment of the present invention. The water quality purification system shown in FIG. 11 is characterized in that, in the water quality purification system 41 shown in FIG. 3, a water quality improvement device 4 for circulating and purifying water in the secondary water tank 3 is further provided. is there. More specifically, the water stored in the secondary water tank 3 is pumped out through the pipe 63, the water quality improvement is improved by the water quality improvement device 4, and returned to the secondary water tank 3 through the pipe 64. It has become. The water quality improvement device 4 is the same device as the water quality improvement device 4 described with reference to FIG. 1 and includes a control unit, an ozone generator / mixer, a circulation pump, and a pressure sensor. Note that the pressure sensor may not be provided.

  Thus, when the water in the secondary water tank 3 is circulated and purified by the water quality improvement device 4, the following advantages are obtained. If the purified water stored in the secondary water tank 3 has not been used for a long period of time, there is a possibility that various germs will propagate in the purified water. Then, once again, the purified water collected in the secondary water tank 3 is circulated and purified by the water quality improvement device 4 so that the purified water stored in the secondary water tank 3 can be used effectively without waste. Can do.

  In particular, when the secondary water tank 3 is disposed in a place with high temperature and humidity such as outdoors, and the volume of the secondary water tank 3 is large, the purified water stored in the secondary water tank 3 is a secondary water storage for a relatively long period of time. There is a case where it is accumulated in the tank 3 and it takes time to be pumped out. In such a case, by repurifying the water in the secondary water storage tank 3, it is possible to provide a water purification system that can pump out more suitable water. Basically, since the water in the secondary water tank 3 is purified water, it is possible to pump the purified water from the secondary water tank 3 even during the period when it is circulated by the water quality improvement device 4. It is.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.
For example, the water quality improvement apparatus according to the present invention includes the ozone generator / mixer 8 and is configured to achieve the purification of the raw water using ozone. Instead, for example, the raw water is electrolyzed, It is good also as a structure which improves water quality by the hypochlorous acid etc. which arise by decomposition | disassembly.

It is a block diagram for demonstrating the structure of the water quality purification system 1 which concerns on one Embodiment of this invention. It is the figure which shows the water quality purification system 100 which concerns on embodiment of this invention, and shows a more specific external appearance structure. It is a block diagram for demonstrating the structure of the water quality purification system 41 which concerns on other embodiment of this invention. 3 is a diagram illustrating a configuration example of a UF filter device 19. FIG. It is a flowchart for demonstrating control operation of the pumping-up pump 16. FIG. It is a flowchart of the water quality improvement control performed by the control part 7 of the water quality improvement apparatus 4 or 41. It is a block diagram which shows the structure of the water quality purification system 21 which concerns on other embodiment of this invention. It is a flowchart of the water quality improvement control of the water quality purification system. It is a block diagram which shows the structure of the water quality purification system 31 concerning the modification of the water quality improvement system 21 shown in FIG. It is a flowchart of the water quality improvement control of the water quality purification system 31. It is a block diagram which shows the structure of the water quality purification system 42 which concerns on further another embodiment of this invention.

Explanation of symbols

1, 21, 31, 41, 42, 100 Water purification system 2 Primary water tank 3 Secondary water tank 4 Water quality improvement device 7 Control unit 8 Ozone generator / mixer 9 Circulation pump 10 Pressure sensor 12 Transfer pump 13 Pressure sensor 14 Ball tap 16 Pumping pump 17 Water level sensor 19 UF filter device 22, 32, 33 Three-way valve

Claims (2)

A primary water tank that collects water or rainwater from wells, rivers or ponds as raw water;
A water quality improvement device for purifying the raw water in the primary water tank by hypochlorous acid generated by mixing ozone generated electrically or by electrolysis of the raw water;
The raw water in the primary water tank is purified by the water quality improvement device, returned to the primary water tank, circulated and purified,
A secondary water tank for storing purified water purified by the water quality improvement device;
A pump for transferring purified water in the primary water tank to the secondary water tank;
A filter device provided between the primary water storage tank and the secondary water storage tank for filtering purified water purified by the water quality improvement device as drinking water;
Control for driving the pump to transfer the purified water in the primary water tank to the secondary water tank after the water quality improvement device is driven for a predetermined time and the raw water in the primary water tank is circulated and purified. Means,
A water purification system characterized by comprising: During raw water supply of the to the primary reservoir, and the in raw water purification primary water tank is characterized in that it further includes a control means that abolish stop the driving of the pump, the water quality according to claim 1, wherein Purification system.

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