WO2013057893A1

WO2013057893A1 - Water purification system

Info

Publication number: WO2013057893A1
Application number: PCT/JP2012/006407
Authority: WO
Inventors: 廣田　達哉
Original assignee: パナソニック株式会社
Priority date: 2011-10-19
Filing date: 2012-10-05
Publication date: 2013-04-25
Also published as: JP2013086034A; JP5982626B2

Abstract

A water purification system is provided with a pump, and a circulation flow path which branches from a first branching position and a second branching position at intake side piping and discharge side piping to form a first flow path and a second flow path, and which circulates water to be treated or clean water, which is water to be treated whereof the quality has been improved. The circulation flow path comprises a water quality improvement device and a primary water tank. Furthermore, the water purification system is provided with first to fourth water channel switching parts, a secondary water tank and a control unit. A switchover is then performed by the first to fourth water channel switching parts so that water to be treated or clean water circulates in the circulation flow path or clean water flows to the secondary water tank.

Description

Water purification system

The present invention relates to a water purification system.

Small-scale water purification that purifies water such as well water, water pumped up from rivers, etc., or rain water, for example, for plant cultivation, as well as washing water for home use and bath water A system has been proposed (see, for example, Patent Document 1).

Most of the conventional water purification systems have the function of improving the quality of the water stored in the water tank or store the water purified by a filter or the like in the water tank.

Also, in the conventional water purification system, when the water in the reservoir is reduced, unpurified water is additionally supplied to the reservoir. For this reason, when using purified water, it is necessary to purify the entire water in the water tank, and during purification of the water in the water tank, water may not be taken out, or unpurified water may have to be used. It was. Furthermore, by mixing purified water, which is purified treated water, and water to be treated, all the water in the water tank must be purified until it is purified again, and efficient treatment cannot be achieved.

Also, when the water purified by the filter or the like is stored in the water storage tank, the water that has passed through the purification device such as the filter once is stored in the water storage tank. Thus, since it is necessary to be made into purified water by one pass of the purification apparatus, the water purification system needs to be highly functional, and is large and expensive.

On the other hand, there is a demand from the market for water purification systems that can use purified water at any time, have a simpler structure, simple construction, and a small installation area.

JP 2007-185615 A

The present invention is a water purification system for improving the quality of treated water. The water purification system includes a pump that pumps up water to be treated by a suction side pipe and discharges it from a discharge side pipe, and a circulation channel. The circulation flow path is branched from the first branch position and the second branch position in the suction side pipe and the discharge side pipe, respectively, to become a first flow path and a second flow path. Connected by a connection unit. In the circulation channel, the water to be treated or the purified water whose quality is improved is circulated. The circulation channel has a water quality improvement device that purifies the treated water and a primary water tank that stores the purified water that has passed through the water quality improvement device. Further, the water purification system includes a position in the suction side pipe that is away from the pump from the first branch position, a position in the discharge side pipe that is away from the second branch position from the pump, a first flow path, and a second flow path. A first water channel switching unit, a second water channel switching unit, a third water channel switching unit, and a fourth water channel switching unit are provided. In addition, the water purification system includes a secondary water storage tank that stores purified water that has exited the primary water storage tank at a position away from the pump from the second water channel switching unit of the discharge side pipe, a first water channel switching unit that drives the pump, And a control unit that controls the second water channel switching unit, the third water channel switching unit, and the fourth water channel switching unit. Then, the first water channel switching unit, the second water channel switching unit, the third water channel switching unit, and the fourth water channel switching unit circulate the treated water or purified water through the circulation channel, or the purified water flows to the secondary water tank. Is switched.

The water purification system having such a configuration can supply water from the primary water tank to the secondary water tank by the control of the first water channel switching unit, the second water channel switching unit, the third water channel switching unit, and the fourth water channel switching unit. The treated water circulates in the circulation channel and is temporarily stored in the primary water tank. Then, the purified water that has been subjected to the purification process a plurality of times by the water quality improvement device is sent to the secondary water tank and stored therein. Since only the water to be treated is purified, the purification efficiency is improved. In addition, since the water to be treated is purified by a plurality of purification treatments, the pumps and the like may be of a small type, and the installation space for each device and the labor of construction can be greatly reduced.

FIG. 1 is a block diagram showing a configuration of a water purification system according to Embodiment 1 of the present invention. FIG. 2 is a block circuit diagram of the water purification system. FIG. 3 is a flowchart of the control unit of the water purification system. FIG. 4 is a block diagram showing the configuration of the water purification system according to Embodiment 2 of the present invention. FIG. 5 is a block diagram showing a configuration of a water quality purification system according to Embodiment 3 of the present invention. FIG. 6 is a block circuit diagram of the water purification system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, water to be pumped from water sources such as wells, rivers or ponds whose water quality is improved by the water purification system, or rainwater is referred to as “treated water”. And the to-be-processed water refined | purified by improving the water quality shall be "purified water".

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a water purification system according to Embodiment 1 of the present invention. As shown in FIG. 1, the water purification system 1 for improving the quality of the water to be treated 24 includes a pump 2, a circulation channel 7, a first water channel switching unit 3, a second water channel switching unit 5, a third water channel switching unit 4, A fourth water channel switching unit 6, a filter 8, an ozone generator / mixer 9, a water quality sensor 10, a primary water tank 11, a secondary water tank 13, a control unit 32, and a water level sensor 12 are provided.

Here, the pump 2 pumps up the treated water 24 (well water in the first embodiment) through the suction side pipe 25 and discharges it from the discharge side pipe 26. The circulation channel 7 connects the first channel 29 and the second channel 30 by the connection portion 31 to circulate the water to be treated 24 or the purified water whose quality of the water to be treated 24 is improved. The first flow path 29 is branched from the first branch position 27 in the suction side pipe 25. Further, the second flow path 30 is branched from the second branch position 28 in the discharge side pipe 26. The circulation flow path 7 includes a filter 8 and an ozone generator / mixer 9 that are water quality improvement devices that purify the water to be treated 24, and a primary water tank 11. The water quality sensor 10 detects the degree of purification of purified water. The primary water tank 11 stores the purified water in the circulation flow path 7 that has been purified by passing through the water quality improvement device. The water level sensor 12 detects the water level of the primary water tank 11.

The first water channel switching unit 3 is disposed at a position away from the first branch position 27 with respect to the pump 2 in the suction side pipe 25. The second water channel switching unit 5 is disposed at a position away from the second branch position 28 with respect to the pump 2 in the discharge side pipe 26. The third water channel switching unit 4 is disposed in the first flow channel 29. The fourth water channel switching unit 6 is disposed in the second flow channel 30.

The secondary water storage tank 13 for storing the purified water that has exited the primary water storage tank 11 is disposed at a position away from the second water channel switching unit 5 of the discharge side pipe 26 with respect to the pump 2. The control unit 32 drives the pump 2 and controls the first water channel switching unit 3, the second water channel switching unit 5, the third water channel switching unit 4, and the fourth water channel switching unit 6.

Then, the first water channel switching unit 3, the second water channel switching unit 5, the third water channel switching unit 4, and the fourth water channel switching unit 6 circulate the treated water 24 or purified water through the circulation channel 7, or two purified water. The flow to the next water tank 13 is switched. The water level sensor 12 and the water level sensor 14 respectively provided in the primary water tank 11 and the secondary water tank 13 are 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. The two water levels are detected.

At the start of operation of the water purification system 1, since the primary water tank 11 is empty, the first water channel switching unit 3 and the fourth water channel switching unit 6 are opened, and the third water channel switching unit 4 and the second water channel switching unit 5 are closed. The operation of the pump 2 begins. When the water level of the primary water tank 11 reaches the high water level WH, the first water tank switching unit 3, the third water channel switching unit 4, the second water channel switching unit 5, and the fourth water channel switching unit 6 act as the primary water tank 11. The water to be treated 24 passes through the circulation channel 7 and is filtered by the filter 8. For example, the filter 8 includes a first filter (not shown) and a second filter (not shown). The first filter is a sand filter using, for example, manganese sand, and mainly removes the manganese component and iron contained in the water to be treated 24. The second filter is, for example, an activated carbon filter, and mainly adsorbs and removes odorous components and miscellaneous bacteria components in the treated water 24.

Next, the ozone generator / mixer 9 decomposes bacteria in the water to be treated 24 and minute organic substances that have passed through the filter 8. The treated water 24 may be water supplied from rivers other than well water, ponds, rainwater storage tanks, and the like. If the most suitable purification means is selected according to the type of the water to be treated 24, the types of water to be treated 24 that can be treated greatly increase.

Here, the ozone generator / mixer 9 which is a water quality improvement device may use at least one of a chemical liquid purification device, an ozone generator / mixer 9, a photocatalyst device, an electrolysis device, and an ultraviolet irradiation device. That is, the ozone generator / mixer 9 is indispensable as a water quality improvement device, and the filter 8 is added as necessary.

Usually, the water to be treated 24 contains a lot of organic substances due to the influence of domestic wastewater. In the one-pass type purification method, organic substances are removed by the high-performance filter 8 or the filtration device. However, although the high-performance filter 8 has high filtration performance, its water channel resistance becomes very large. Therefore, the pump 2 is large, expensive, and consumes high power.

In the first embodiment of the present invention, the water to be treated 24 in the circulation flow path 7 can be circulated a plurality of times, so that the filter 8 and the ozone generator / mixer 9 can be downsized. As a result, the water purification system 1 is not only inexpensive, but also leads to downsizing of the pump 2. For this reason, installation space and power consumption also become small.

Further, for example, a pipe 21 for taking out purified water into the house 20 is connected to the secondary water tank 13. The piping 21 in the house 20 is provided with a high-pressure pump 15 and a UF (Ultrafiltration Membrane) membrane 16. The UF membrane 16 is made of, for example, polyvinyl chloride, cellulose acetate, polyether sulfone, or polyacrylonitrile. The membrane module structure of the UF membrane 16 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 by the UF membrane 16, it is sterilized by the action of the minute pore diameter, and extremely fine foreign matters such as viruses are captured. Therefore, germs and viruses remaining in the purified water are removed, and the water becomes suitable for drinking.

Therefore, even if the water purification system 1 is not used for a long time by the UF membrane 16, even if the installation location of the primary water storage tank 11 and the secondary water storage tank 13 is high temperature, the water stored in the secondary water storage tank 13 is not used. The collected purified water is repurified and can be used for beverages.

FIG. 2 is a block circuit diagram of the water purification system according to Embodiment 1 of the present invention. The primary water tank 11 is provided with a water level sensor 12, and the circulation channel 7 is provided with a water quality sensor 10. A water level sensor 14 is installed in the secondary water tank 13. Based on the output of the water quality sensor 10, the control unit 32 drives the filter 8 and the ozone generator / mixer 9, the first water channel switching unit 3, the second water channel switching unit 5, the third water channel switching unit 4, and the fourth water channel switching. Control at least one of the units 6.

As shown in FIG. 2, the signals of the

water level sensors

12 and 14 and the water quality sensor 10 and the operation course input signal are input to the control unit 32, and the control unit 32 includes the pump 2, the first water channel switching unit 3, and the third water channel switching unit. 4. The second water channel switching unit 5, the fourth water channel switching unit 6, the ozone generator / mixer 9, and the display unit (not shown) are controlled. The driving course can be selected from “water quality sensor course” and “time driving course”. The “time driving course” can be further selected from three courses of “60 minutes driving course”, “30 minutes driving course”, and “10 minutes driving course”.

FIG. 3 is a flowchart of the control unit of the water purification system according to Embodiment 1 of the present invention. As shown in FIG. 3, when the user inputs “operation course”, it is checked whether the water level of the secondary water tank 13 has reached the high water level WH. When the water level of the secondary water tank 13 is lowered (the user uses clean water), it is checked whether the water tank is once full after the next operation. If it is not “full of water”, it is recognized as “first use” and the circulation purification process is continued until the water is full. If the secondary water tank 13 is full, it is recognized as “continuous use” and waits until the low water level WL is reached.

Next, the circulation purification process will be described. The well water which is the treated water 24 is pumped up by the pump 2, but at that time, the first water channel switching unit 3, the third water channel switching unit 4 and the fourth water channel switching unit 6 are open, and the second water channel switching unit 5 is closed. ing. The treated water 24 in the circulation channel 7 is improved in water quality by the filter 8 and the ozone generator / mixer 9 which are water quality improvement devices. Next, the first water channel switching unit 3 and the fourth water channel switching unit 6 are closed, the third water channel switching unit 4 and the second water channel switching unit 5 are opened, and the water to be treated 24 is purified by the ozone generator / mixer 9, It is sent to the water tank 11.

¡If it is a one-pass type conventional purification method, all purification must be performed at the same time. Therefore, although a highly functional purification system is required, in the water purification system 1 of the present invention, the treated water 24 circulates in the circulation flow path 7 a plurality of times. As a result, even if the high-performance filter 8 and the ozone generator / mixer 9 are not employed, sufficient purification capability can be obtained.

When the output of the water quality sensor 10 is input to the control unit 32, the degree of purification of the water to be treated 24 in the circulation flow path 7 is grasped. The user can select a “water quality sensor course” that stops at a desired degree of purification and a “time operation course” in which the circulation purification time can be determined without using the water quality sensor 10. As a result, purified water having a desired purification degree is obtained.

The purified water is supplied to the secondary water tank 13 by opening the third water channel switching unit 4 and the second water channel switching unit 5 and closing the first water channel switching unit 3 and the fourth water channel switching unit 6 and operating the pump 2. The At that time, the ozone generator / mixer 9 stops. When the water level of the primary water tank 11 becomes the low water level WL, the first water channel switching unit 3, the third water channel switching unit 4, the second water channel switching unit 5, and the fourth water channel switching unit 6 are closed, and the pump 2 and ozone generation / The mixer 9 stops. The above operation is repeated until the secondary water tank 13 reaches a high water level (full water level) WH.

(Embodiment 2)
In the second embodiment of the present invention, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. FIG. 4 is a block diagram showing the configuration of the water purification system according to Embodiment 2 of the present invention. Instead of the first water channel switching unit 3, the third water channel switching unit 4, the second water channel switching unit 5, and the fourth water channel switching unit 6 of the first embodiment, three-

way valves

17 and 18 are used.

At the start of operation, the three-way valve 17 opens and the water to be treated 24 is pumped up. The purified water is circulated in the circulation flow path 7a during purification by the control of the three-

way valves

17 and 18, and is fed to the secondary water tank 13 after purification. As in the first embodiment, the above operation is repeated until the secondary water tank 13 reaches a high water level (full water level) WH.

In the water purification system 1a according to the second embodiment of the present invention, the number of the three-

way valves

17 and 18 is the same as that of the first water channel switching unit 3 and the third three, although the piping configuration is not significantly different from that of the first embodiment. The number of the water channel switching unit 4, the second water channel switching unit 5, and the fourth water channel switching unit 6 is less, and the piping configuration is simpler and the number of control wires is reduced.

(Embodiment 3)
In the third embodiment of the present invention, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. FIG. 5 is a block diagram showing a configuration of a water purification system according to Embodiment 3 of the present invention, and FIG. 6 is a block circuit diagram of the water purification system. As shown in FIG. 5, the water purification system 1 b has a configuration in which the primary water tank 11 is eliminated from the water purification system 1 according to Embodiment 1 of the present invention. In the water purification system 1b, a water level sensor 22 and a water level sensor 23 are arranged in the circulation flow path 7b with the ozone generator / mixer 9 interposed therebetween. Instead of the primary water tank 11, the circulation channel 7 b serves as the primary water tank 11.

The purified water after purification into the secondary water tank 13 cannot be supplied unless air enters the circulation flow path 7b. However, when the air inflow valve 19 connected to the filter 8 is opened, air flows in and purified water is sent. In this way, the circulation channel 7 is provided with the air inflow valve 19 for taking in air at the top of the circulation channel 7b. The water level sensor 22 and the water level sensor 23 are, for example, electrode type water level detection sensors, and detect the water level in the circulation channel 7b. By inputting the signals of the

water level sensors

22 and 23 to the control unit 32, the pump 2 does not cause problems such as air biting.

FIG. 6 is a block circuit diagram of the water purification system of Embodiment 3 of the present invention. As shown in FIG. 6, the signals of the

water level sensors

12, 14, 22, 23, the water quality sensor 10 and the operation course input signal are input to the control unit 32, and the control unit 32 performs the pump 2, the first water channel switching unit 3, The three water channel switching unit 4, the second water channel switching unit 5, the fourth water channel switching unit 6, the ozone generator / mixer 9, and the display unit (not shown) are controlled.

Thus, the water quality purification system 1b according to Embodiment 3 of the present invention can eliminate the primary water tank 11. This further reduces the installation area of the water purification system 1b.

The water purification system of the present invention can improve water quality such as well water, river water, or rainwater. Therefore, it is useful as a water purification system used for small-scale facilities.

1, 1a, 1b Water purification system 2 Pump 3 First water channel switching unit 4 Third water channel switching unit 5 Second water channel switching unit 6 Fourth water channel switching unit 7, 7a, 7b Circulation channel 8 Water quality improvement device (filter)
9 Water quality improvement device (ozone generator / mixer)
DESCRIPTION OF SYMBOLS 10 Water quality sensor 11

Primary water tank

12, 14, 22, 23 Water level sensor 13 Secondary water tank 15 High pressure pump 16

UF membrane

17, 18 Three-way valve 20 House 21 Pipe 24 Water to be treated 25 Suction side pipe 26 Discharge side pipe 27 1 branch position 28 2nd branch position 29 1st flow path 30 2nd flow path 31 Connection part 32 Control part

Claims

A water purification system for improving the quality of treated water,
A pump that pumps up the water to be treated by suction side piping and discharges it from the discharge side piping;
The suction side pipe and the discharge side pipe are respectively branched from the first branch position and the second branch position to form the first flow path and the second flow path, and the first flow path and the second flow path are connected to each other. A circulating flow path for circulating the treated water, or purified water that has improved the quality of the treated water, connected by a section,
The circulation channel is a water quality improvement device that makes the treated water the purified water,
A primary water tank for storing the purified water that has passed through the water quality improvement device;
Further, a position in the suction side pipe that is separated from the pump from the first branch position, a position in the discharge side pipe that is separated from the second branch position from the pump, the first flow path, and the second flow A first water channel switching unit, a second water channel switching unit, a third water channel switching unit, and a fourth water channel switching unit respectively provided on the road;
A secondary water storage tank for storing the purified water that has exited the primary water storage tank at a position away from the pump from the second water channel switching unit of the discharge side pipe;
A controller for driving the pump and controlling the first water channel switching unit, the second water channel switching unit, the third water channel switching unit, and the fourth water channel switching unit;
The treated water or the purified water circulates in the circulation channel by the first water channel switching unit, the second water channel switching unit, the third water channel switching unit, and the fourth water channel switching unit, or the purified water is Whether to flow to the secondary water tank is switched.
The water purification system according to claim 1, wherein an air inflow valve for taking air into the circulation channel is provided at the uppermost part of the circulation channel and the primary water tank is eliminated.
A water quality sensor is provided in the circulation flow path, and the control unit is configured to drive the water quality improvement device according to an output of the water quality sensor, the first water channel switching unit, the second water channel switching unit, the third water channel switching unit, 2. The water purification system according to claim 1, wherein at least one of the fourth water channel switching unit is controlled.
The water quality purification system according to claim 1, wherein the water quality improvement device uses at least one of a chemical solution purification device, an ozone generator / mixer, a photocatalyst device, an electrolysis device, and an ultraviolet irradiation device.