WO2023175806A1

WO2023175806A1 - Water circulation/purification system

Info

Publication number: WO2023175806A1
Application number: PCT/JP2022/012082
Authority: WO
Inventors: 祥陛金尾
Original assignee: 中国電力株式会社
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2023-09-21
Also published as: WO2023176010A1; JPWO2023175806A1; JP7302745B1

Abstract

A water circulation/purification system is provided in which water being circulated can be more efficiently utilized.　The water circulation/purification system S comprises a hand-washing shower 12, a first purification device 10, a first tank 11, a toilet 22, a second purification device 20, and a control unit 50. The hand-washing shower 12 utilizes clean water and discharges gray water. The first purification device 10 purifies the gray water from the hand-washing shower 12 to give clean water. The first tank 11 stores the clean water which has been purified by the first purification device 10 and is for use in the hand-washing shower 12. The toilet 22 utilizes the gray water and discharges sewage water. The second purification device 20 purifies the sewage water from the toilet 22 to give gray water for use in the toilet 22. The control unit 50 performs control so that when the amount of the clean water stored in the first tank 11 is less than a given amount, the first purification device 10 purifies the gray water which has been purified by the second purification device 20.

Description

water circulation purification system

The present invention relates to a water circulation purification system.

Conventionally, there is a known technology that purifies used water, circulates it, and reuses it. An example of this type of technology is Patent Document 1. Patent Document 1 describes a sedimentation separation chamber that separates solid content in sewage discharged from a toilet, an aeration treatment chamber that aerates separated water derived from the sedimentation separation chamber, and a The treated water is discharged from a treatment tank provided with first and second shell aeration chambers for further aeration treatment, and an activated carbon adsorption chamber for decolorizing the supernatant treated water derived from the second shell contact aeration chamber. A technique is described in which treated water is supplied to a water tank of a toilet by a water supply means.

Patent No. 3659591

By the way, in the technology shown in Patent Document 1, the water discharged by the user is added to the water circulating through the toilet (used equipment) and gradually increases, so the excess water of the increased water is discharged. There was a need to make more effective use of the water being discharged.

An object of the present invention is to provide a water circulation purification system that can utilize circulating water more efficiently.

(1) The water circulation purification system according to the present invention includes a first usage facility that uses clean water to discharge gray water, and a first purification device that purifies the gray water discharged by the first usage facility into clean water. , a first tank for storing clean water purified by the first purification device for use by the first usage equipment, a second usage equipment for discharging sewage using gray water, and the second usage equipment a second purification device that purifies sewage discharged by the user into gray water for use by the second utilization facility; and when the amount of clean water accumulated in the first tank is less than a predetermined amount, A control unit that controls gray water purified by the second purification device to be purified into clean water.

The water circulation purification system (1) can provide a water circulation purification system that can use circulating water more efficiently.

(2) The water circulation purification system according to the present invention includes a second tank that collects gray water that has been purified by the second purification device and is to be used by the second usage equipment; a supply device that supplies gray water to the first purification device, and the control unit controls the supply device to supply gray water that accumulates in the second tank when the amount of clean water that accumulates in the first tank is less than the predetermined amount. It is preferable to control the water so as to supply it to the first purification device.

In the water circulation purification system (2), gray water stored in the second tank can be purified by the first purification device and stored in the first tank, so the amount of clean water stored in the first tank is less than the predetermined amount. In this case, the supply device can supply the water to the first purification device in a more timely manner, and the reduction in circulating water can be suppressed more reliably.

(3) The water circulation purification system according to the present invention includes a first measurement unit that measures the amount of clean water accumulated in the first tank, and the control unit controls the amount of water in the first tank measured by the first measurement unit. When the amount of clean water accumulated in the second tank is less than the predetermined amount, it is preferable that the supply device supplies gray water accumulated in the second tank to the first purification device.

(3) The water circulation purification system can automatically supply greywater accumulated in the second tank to the first purification device in a timely manner when the amount of clean water accumulated in the first tank becomes less than a predetermined amount. , it is possible to more reliably suppress the decrease in circulating water.

(4) The water circulation purification system according to the present invention includes a rainwater tank that stores rainwater, and a stored rainwater amount measuring section that measures the amount of water stored in the rainwater tank, and the control section is configured to control the first measuring section. If the amount of clean water collected in the first tank measured by is less than the predetermined amount, and the amount of rainwater collected in the rainwater tank measured by the stored rainwater amount measuring section is greater than the predetermined lower limit amount. In this case, the supply device supplies rainwater accumulated in the rainwater tank to the first purification device, and the amount of clean water accumulated in the first tank measured by the first measurement unit is less than the predetermined amount. , and when the amount of rainwater accumulated in the rainwater tank measured by the accumulated rainwater amount measurement unit is less than the predetermined lower limit amount, the gray water accumulated in the second tank is transferred to the supply device from the first purification device. It is preferable to supply it to

The water circulation purification system (4) is also equipped with a rainwater tank that collects rainwater, and rainwater, which has less emotional resistance than gray water that has been purified from sewage, can be preferentially cleaned and used as clean water.

(5) The water circulation purification system according to the present invention includes a second measurement unit that measures the amount of gray water accumulated in the second tank, and the control unit controls the amount of water in the first tank measured by the first measurement unit. When the amount of clean water accumulated in the second tank is less than the predetermined amount, and when the amount of gray water accumulated in the second tank measured by the second measuring section is greater than the predetermined upper limit amount, the supply device Preferably, gray water accumulated in the second tank is supplied to the first purification device.

The water circulation purification system (5) can prevent too much water from accumulating in the second tank, and can make more effective use of the circulating water.

(6) The water circulation purification system according to the present invention preferably includes a second supply device capable of supplying the clean water accumulated in the first tank to the second utilization facility.

The water circulation purification system (6) can circulate and reuse water more flexibly.

According to the present invention, it is possible to provide a water circulation purification system that can utilize circulating water more efficiently.

1 is a schematic diagram showing an example of a water circulation purification system S according to an embodiment of the present invention. It is a flow chart for explaining an example of water replenishment processing concerning one embodiment of the present invention. It is a flow chart for explaining an example of hot water washing processing concerning one embodiment of the present invention. It is a flow chart for explaining an example of water replenishment processing concerning a modification of the present invention.

Hereinafter, a water circulation purification system S according to an embodiment of the present invention will be described using FIG. 1. In FIG. 1, arrows displayed between blocks indicate the flow of circulating water. Further, in FIG. 1, dotted lines displayed between blocks indicate that they are communicably connected.

The water circulation purification system S is a system that uses water within the system, purifies the water after use, and circulates and reuses the water. The water circulation purification system S includes a first circulation system 1, a second circulation system 2, a supply section 3, a replenishment section 4, a power source (not shown), and a control section 50. With conventional technology that uses toilets as equipment, water from the human body enters through the equipment, so water gradually accumulates in the surplus water tank, but vacuum trucks are used for purposes other than cleaning and filling purification equipment. It has to be pumped up and disposed of. On the other hand, with technology that uses showers, hand-washing facilities, etc. as equipment, if the equipment is a shower or washbasin that uses tap water and discharges gray water, each time the equipment is used, the user Some of the water circulating in the body sticks to the body and flows out, reducing the amount of water circulating. The water circulation purification system S according to the embodiment of the present invention ranges from a water circulation purification system in which water accumulates, such as in a toilet, to a water circulation purification system in which water decreases, such as in a shower or sink. This allows the water to be used more efficiently.

The water used in the water circulation purification system S is required to have a quality that corresponds to the purpose of use. For example, when using water for showering, hand washing, etc., the quality of the water is required to be clean water. On the other hand, when used in a toilet, etc., the quality of water does not necessarily have to be clean water, but only needs to be gray water or higher.

Therefore, the water circulation purification system S according to the present embodiment includes a first circulation system 1 that can purify clean water according to the usage equipment that requires clean water, and a middle circulation system that can purify the water to clean water according to the usage equipment that requires water quality of gray water or higher. It is composed of a second circulation system 2 that can purify water, and can circulate and purify water more efficiently to make it reusable.

<First circulation system>
The first circulation system 1 is configured to purify gray water into clean water and recycle water. The first circulation system 1 includes a first purification device 10, a first tank 11, a shower hand washing device 12 as a first usage part, a first purified water supply line L10, a first usage water supply line L11, It has a first used water supply line L12.

The first purified water supply line L10 is a flow path that connects the first purifier 10 and the first tank 11 and supplies water purified by the first purifier 10 to the first tank 11.

The first usable water supply line L11 is a flow path that connects the first tank 11 and the shower hand-washing device 12, and through which clean water accumulated in the first tank 11 is supplied to the shower hand-washing device 12.

The first used water supply line L12 is a flow path that connects the shower hand washing device 12 and the first purification device 10 and supplies gray water generated in the shower hand washing device 12 to the first purification device 10.

In the first circulation system 1, as shown in FIG. Water circulates in the order of the tank 11, the shower hand washing device 12, and the first purification device 10.

The first purification device 10 purifies gray water discharged by the shower hand washing device 12 and turns it into clean water. Gray water is, for example, miscellaneous water or rainwater. The first purification device 10 includes, for example, a pump (not shown) that is connected to the first used water supply line L12 and sucks gray water discharged from the shower hand washing device 12, and purifies the gray water sucked by the pump. and a purification section (not shown) configured with an activated carbon filter or the like for cleaning.

The first tank 11 is a tank that stores clean water that has been purified by the first purification device 10 and is to be used in the shower hand washing device 12. The first tank 11 is connected to the first purified water supply line L10. The first tank 11 includes a tank main body 11a in which a space is formed in which clean water purified by the first purification device 10 accumulates, and a first tank provided inside the tank main body 11a and capable of measuring the water accumulated inside the tank main body 11a. It has a water level gauge 11b as a measuring section. The water level gauge 11b may be, for example, an electrode type water level gauge or a float type water level gauge.

The shower hand washing device 12 is a facility that uses clean water from showers, washrooms, etc., and discharges gray water after use. The shower hand washing device 12 includes, for example, a pump (not shown) that is connected to the first water supply line L11 and sucks clean water from the first tank 11, and a shower unit, washbasin, etc. that uses the clean water sucked from the pump. and has.

<Second circulation system>
The second circulation system 2 is configured to purify sewage into gray water and recycle water. The second circulation system 2 includes a second purification device 20, a second tank 21, a toilet 22 as a second usage part, a second purified water supply line L20, a second usage water supply line L21, and a second usage water supply line L21. It has a used water supply line L22.

The second purified water supply line L20 is a flow path that connects the second purifier 20 and the second tank 21 and supplies water purified by the second purifier 20 to the second tank 21.

The second usage water supply line L21 is a flow path that connects the second tank 21 and the toilet 22 and supplies gray water accumulated in the second tank 21 to the toilet 22.

The second used water supply line L22 is a flow path that connects the toilet 22 and the second purification device 20, and through which sewage generated in the toilet 22 is supplied to the second purification device 20.

In the second circulation system 2, as shown in FIG. Water circulates in the order of tank 21, toilet 22, and second purifier 20.

The second purification device 20 purifies the sewage discharged by the toilet 22 into gray water for reuse in the toilet. The second purification device 20 includes, for example, a pump (not shown) that is connected to the second used water supply line L22 and sucks sewage from the toilet 22, and a purification section (not shown) that purifies the sewage sucked into the pump. and has. The purification section may include, for example, a sedimentation separation chamber, an aeration treatment chamber, a first shell contact aeration chamber, a second shell contact aeration chamber, a sedimentation filtration chamber, and an activated carbon adsorption chamber. good.

In the sedimentation separation chamber, solids in wastewater are separated. In the aeration chamber, the separated water drawn out from the precipitation separation chamber is aerated. In the first and second shell contact aeration chambers, the treated water led out from the aeration chamber is further aerated. In the sedimentation filtration chamber, the treated water drawn out from the second shell contact aeration chamber is subjected to sedimentation filtration. In the activated carbon adsorption chamber, the supernatant treated water derived from the sedimentation filtration chamber is decolorized.

The second tank 21 is a tank that stores gray water that has been purified by the second purification device 20 and is to be used in the toilet 22. The second tank 21 is connected to the second purified water supply line L20, and includes a tank main body 21a in which a space for storing gray water purified by the second purifier 20 is formed, and a tank main body 21a provided inside the tank main body 21a. , and a water level gauge 21b as a second measurement unit capable of measuring water accumulated inside. The water level gauge 21b may be, for example, an electrode type water level gauge or a float type water level gauge.

The toilet 22 is a facility that uses gray water or tap water, and discharges sewage after use. The toilet 22 includes, for example, a pump (not shown) that is connected to the second usage water supply line L21 and sucks gray water from the second tank 21, a toilet body 22a such as a toilet bowl, and a toilet body 22a that is installed in the toilet body 22a and is connected to the user's buttocks. It has a hot water cleaning device 22b that performs a cleaning operation for cleaning. The hot water washing device has a tank (not shown) that stores clean water, and uses the clean water in the tank to clean the user's buttocks.

<Supply section>
The supply section 3 is configured to supply water between the first circulation system 1, the second circulation system 2, and the supply section 4. The supply unit 3 includes a first pump 30, a second pump 31 as a supply device, a third pump 32 as a second supply device, a rainwater supply line L30, a second tank water supply line L31, and a first A tank water supply line L32 is included.

The rainwater supply line L30 connects the rainwater tank 40 and the first used water supply line L12, and gray water collected in the rainwater tank 40 is supplied to the first purification device 10 via the first used water supply line L12. This is the flow path where the

The second tank water supply line L31 connects the second tank 21 and the first used water supply line L12, and the gray water accumulated in the second tank 21 is transferred to the first used water supply line L12 through the first used water supply line L12. This is a flow path that is supplied to the purification device 10.

The first tank water supply line L32 is a flow path that connects the first tank 11 and the hot water cleaning device 22b of the toilet 22, and through which the clean water accumulated in the first tank 11 is supplied to the hot water cleaning device 22b.

The first pump 30 is configured to replenish water from the replenishment section 4 to the first circulation system 1. The first pump 30 supplies gray water as rainwater accumulated in the rainwater tank 40 of the replenishment unit 4 to the first purification device 10 of the first circulation system 1 via the rainwater supply line L30. In this embodiment, the quality of rainwater is treated as water for general use, that is, equivalent to gray water. However, the classification of water quality is not limited to this. In this way, the first pump 30 supplies gray water as rainwater from the supply section 4 to the first circulation system 1, as shown in FIG.

The second pump 31 is configured to replenish gray water from the second circulation system 2 to the first circulation system 1. The second pump 31 supplies gray water accumulated in the tank body 21a of the second tank 21 of the second circulation system 2 to the first purification device 10 of the first circulation system 1 via the second tank water supply line L31. In this way, the second pump 31 supplies gray water from the second circulation system 2 to the first circulation system 1, as shown in FIG.

The third pump 32 is configured to replenish clean water from the first circulation system 1 to the second circulation system 2. The third pump 32 supplies the clean water accumulated in the tank body 11a of the first tank 11 of the first circulation system 1 to the hot water washing device 22b of the second circulation system 2 via the first tank water supply line L32. In this way, the third pump 32 supplies water from the first circulation system 1 to the second circulation system 2, as shown in FIG.

<Supply Department>
The replenishment unit 4 includes a rainwater tank 40 and is configured to replenish water from the outside when the amount of water circulating in the first circulation system decreases. For example, when using the first circulation system with the shower hand washing device 12, when the user washes his body and hands, water adheres to them and goes outside, reducing the amount of water being circulated. Therefore, replenish the water that has decreased.

The rainwater tank 40 is a tank for storing rainwater. The rainwater tank 40 includes a water collection part having a rain gutter (not shown), a tank body 40a that stores rainwater collected in the water collection part, and a tank body 40a that is provided inside the tank body 40a to adjust the water level of gray water collected in the tank body 40a. It has a water level gauge 40b as a storage rainwater amount measuring section that measures the amount of rainwater. The water level gauge 40b may be, for example, an electrode type water level gauge or a float type water level gauge.

Note that the configuration of the replenishment unit 4 is not limited to the rainwater tank 40. For example, instead of the rainwater tank 40, water may be obtained from a water pipe, or water may be obtained from a river or a well. Further, although the replenishment unit 4 according to the present embodiment replenishes water to the first circulation system 1, it may also replenish water to the second circulation system 2.

<Power supply section>
The power supply unit is configured to supply power to the water circulation purification system S. The power supply unit may include a battery such as a solar cell, for example. Note that the power supply unit may be configured to receive power from an external source.

<Control unit>
The control unit 50 controls various operations of the water circulation purification system S. The control unit 50 is composed of, for example, a processor such as a CPU. Control in the water circulation purification system S according to this embodiment is realized by the operation of the processor and the like. However, the control in the water circulation purification system S may be realized by hardware such as a control circuit.

The control unit 50 is communicably connected to each of the water level gauge 11b of the first tank 11, the water level gauge 21b of the second tank 21, and the water level gauge 40b of the rainwater tank 40, and the water level gauge 11b of the first tank Then, the detection results of the water level gauge 21b of the second tank 21 and the water level gauge 40b of the rainwater tank 40 can be obtained.

Further, the control unit 50 is communicably connected to the first pump 30, the second pump 31, and the third pump 32, and can control the operations of the first pump 30, the second pump 31, and the third pump 32. be. For this reason, the control unit 50 performs a water replenishment process that controls the operation of the first pump 30 and the second pump 31 based on the detection results of the water level gauge 11b of the first tank and the water level gauge 40b of the rainwater tank 40, and the third pump. A hot water cleaning process can be performed to control the operation of 32.

Next, the water replenishment process and hot water cleaning process executed by the control unit 50 will be described using FIGS. 2 and 3. The water replenishment process is executed when the amount of clean water accumulated in the first tank 11 is less than a predetermined amount. In the water replenishment process, when the gray water that accumulates in the tank body 40a of the rainwater tank 40 is larger than a predetermined lower limit amount, the control unit 50 controls the first pump 30 to remove the gray water that accumulates in the rainwater tank 40. It is supplied to the first purification device 10 of the circulation system 1.

On the other hand, in the water replenishment process, when the gray water accumulated in the rainwater tank 40 is less than the predetermined lower limit amount, the control unit 50 controls the second pump 31 to remove the gray water accumulated in the second tank 21 of the second circulation system 2. By doing so, the first purifying device 10 of the first circulation system 1 is supplied.

That is, in the water circulation purification system S according to the present embodiment, when the amount of clean water that accumulates in the tank body 11a of the first tank 11 decreases, the tank body 11a is refilled while the water accumulates in the tank body 21a of the second tank 21. Replenishment from gray water accumulated in the tank body 40a of the rainwater tank 40 is prioritized over replenishment from water.

In addition, in the hot water washing process, when the user uses the warm water washing toilet seat, the clean water accumulated in the tank body 11a of the first tank 11 of the first circulation system 1 is transferred to the third pump 32 by the hot water washing device 22b of the second circulation system 2. This is a process in which hot water is supplied to the hot water washing device 22b of the toilet 22, which serves as the second usage section, to perform a washing operation. The water used in hot water washing equipment is required to have the same quality as clean water, but in the water circulation purification system S, the clean water purified in the first circulation system 1 can be used in the second circulation system 2, so the quality is even higher. Circulating water can be purified and used flexibly and efficiently.

<Water replenishment process>
The water replenishment process executed by the control unit 50 in the water circulation purification system S according to this embodiment will be described using FIG. 2. The replenishment process starts when the water circulation purification system S is powered on, and ends when the power is turned off for maintenance or the like, for example.

First, the control unit 50 checks whether the amount of clean water accumulated in the tank body 11a measured by the water level gauge 11b of the first tank 11 is less than or equal to a predetermined amount (step S10). The predetermined amount is defined as, for example, the amount used once in the shower hand washing device 12 as the first usage equipment. That is, when the amount of clean water accumulated in the tank body 11a of the first tank 11 does not satisfy the remaining amount for one use, water replenishment processing is performed. However, the predetermined amount is not limited to this.

If the amount of clean water that accumulates in the tank body 11a is not below the predetermined value (step S10: NO), the control unit 50 moves the process to step S10, and continues the process until the amount of clean water that accumulates in the tank body 11a becomes below the predetermined value. Repeat the same process. If the amount of clean water that accumulates in the tank body 11a is less than or equal to the predetermined amount (step S10: YES), the control unit 50 determines that the amount of gray water that accumulates in the tank body 40a as measured by the water level gauge 40b of the rainwater tank 40 is a predetermined amount. It is confirmed whether the amount is above the lower limit amount (step S11).

The predetermined lower limit amount is defined, for example, when there is no water at the bottom of the tank body 40a of the rainwater tank 40. That is, after the gray water accumulated in the tank body 40a of the rainwater tank 40 is exhausted, the gray water accumulated in the tank body 21a of the second tank 21 is replenished to the first purification device 10. However, the regulation of the predetermined lower limit amount is not limited to this.

When the amount of gray water accumulated in the tank body 40a of the rainwater tank 40 is equal to or greater than the predetermined lower limit amount (step S11: YES), the control unit 50 causes the first pump 30 to transfer the water accumulated in the tank body 40a of the rainwater tank 40 to the first pump. It is supplied to the purification device 10 (step S12), and the process moves to step S14.

On the other hand, if the amount of gray water accumulated in the tank body 40a of the rainwater tank 40 is less than the predetermined lower limit amount (step S11: NO), the control unit 50 causes the second pump 31 to cause gray water to accumulate in the tank body 21a of the second tank 21. Water is supplied to the first purification device 10 (step S13), and the process moves to step S14.

The control unit 50 checks whether the water circulation purification system S has been powered off in step S14 (step S14). If there is no operation to turn off the power of the water circulation purification system S (step S14: NO), the control unit 50 shifts the process to step S10. If there is an operation to turn off the power of the water circulation purification system S (step S14: YES), the control unit 50 ends the process.

<Hot water cleaning process>
Next, the hot water cleaning process executed by the control unit 50 in the water circulation purification system S according to the present embodiment will be described using FIG. 3. The hot water cleaning process is a process in which the hot water cleaning device 22b of the toilet 22 cleans the user's buttocks and supplies water from the first tank 11 that has been lost due to the cleaning. The hot water cleaning process is started when the power of the water circulation purification system S is turned on, and ends when the power is turned off, for example, for maintenance or the like.

The control unit 50 confirms whether or not the warm water bidet toilet seat has been operated (step S20). The operation of using the hot water flushing toilet seat is, for example, an operation of pressing an operation start button of the hot spring cleaning device 22b provided on the toilet body 22a. If the operation to use the warm water flush toilet seat is not performed (step S20: NO), the control unit 50 moves the process to step S20, and repeats the same process until the operation to use the warm water flush toilet seat is performed. When the warm water flushing toilet seat is operated (step S20: YES), the control unit 50 causes the third pump 32 to supply the clean water accumulated in the tank body 11a of the first tank 11 to the warm water flushing device 22b of the toilet 22. (Step S21).

Next, the control unit 50 checks whether there is an operation to turn off the power of the water circulation purification system S (step S22). If there is no operation to turn off the power of the water circulation purification system S (step S22: NO), the control unit 50 shifts the process to step S20. If there is an operation to turn off the power of the water circulation purification system S (step S22: YES), the control unit 50 ends the process.

The water circulation purification system S according to the embodiment of the present invention described above can purify circulating water and efficiently reuse it depending on the usage form. In addition, the water circulation purification system S according to an embodiment of the present invention eliminates the need to install new water and sewage lines in cases where water and sewage lines are unavailable due to a disaster, or in areas where water and sewage lines are not well-developed, such as in desert areas. In addition, since there is no need to pay for the use of such infrastructure, initial costs and running costs can be reduced.

In addition, the water circulation purification system S according to an embodiment of the present invention takes less time to install and is easy to move, so it can be used in places where it takes time to construct conventional infrastructure, such as disaster sites and desert areas. It is possible to improve hygiene and health more easily and flexibly.

[Modified example]
It should be noted that the present invention is not limited to the above-described embodiments, and any modifications, improvements, etc. that can achieve the purpose of the present invention are included in the present invention.
It is Noh.

If the configuration of the water circulation purification system S according to the modification is similar to the above-described embodiment, the same name and reference numerals may be given and detailed explanation may be omitted.

For example, in the water circulation purification system S according to the embodiment described above, when the amount of clean water that accumulates in the tank body 11a of the first tank 11 becomes less than a predetermined amount, the gray water that accumulates in the tank body 40a of the rainwater tank 40 is removed. Control was performed such that gray water is preferentially supplied to the first purification device 10, and when gray water accumulated in the tank body 40a is less than a predetermined lower limit amount, it is supplied from the tank body 21a of the second tank 21 to the first purification device 10. However, it is not limited to this.

For example, if the amount of clean water accumulated in the first tank 11 measured by the water level gauge 11b of the first tank 11 is less than a predetermined amount, and the control unit 50 according to the modified example When the amount of gray water accumulated in the second tank 21 measured by 21b is larger than a predetermined upper limit amount, the second pump 31 may be made to supply the gray water accumulated in the second tank 21 to the first purification device 10. . In this embodiment, the predetermined upper limit amount is defined as, for example, 90% of the amount of water that can be stored in the second tank. However, the predetermined upper limit amount is not limited to this and can be set.

<Water replenishment process according to modified example>
The replenishment process executed by the control unit 50 in the water circulation purification system S according to this modification will be described using FIG. 4. The replenishment process starts when the water circulation purification system S is powered on, and ends when the power is turned off for maintenance or the like, for example.

First, the control unit 50 checks whether the amount of clean water accumulated in the tank body 11a measured by the water level gauge 11b of the first tank 11 is less than or equal to a predetermined amount (step S30). If the amount of clean water that accumulates in the tank body 11a is not less than the predetermined amount (step S30: NO), the control unit 50 moves the process to step S30, and the amount of clean water that accumulates in the tank body 11a reaches the predetermined amount. Repeat the same process until the following. When the amount of clean water that accumulates in the tank body 11a is less than or equal to the predetermined amount (step S30: YES), the control unit 50 determines that the amount of gray water that accumulates in the tank body 40a measured by the water level gauge 40b of the rainwater tank 40 is equal to or less than the predetermined amount (step S30: YES). It is confirmed whether the amount is above the lower limit amount (step S31).

When the amount of gray water accumulated in the tank body 40a of the rainwater tank 40 is less than the predetermined lower limit amount (step S31: NO), the control unit 50 causes the second pump 31 to drain the gray water accumulated in the tank body 21a of the second tank 21. It is supplied to the first purification device 10 (step S34), and the process moves to step S35.

On the other hand, if the amount of gray water accumulated in the tank main body 40a of the rainwater tank 40 is equal to or higher than the predetermined lower limit amount (step S31: YES), the control unit 50 controls the tank main body 21a measured by the water level gauge 21b of the second tank 21. It is checked whether the amount of collected gray water is equal to or greater than a predetermined upper limit amount (step S32).

If the amount of gray water accumulated in the tank body 21a of the second tank 21 is not equal to or greater than the predetermined upper limit amount (step S32: NO), the control unit 50 causes the first pump 30 to drain the water accumulated in the tank body 40a of the rainwater tank 40. It is supplied to the first purification device 10 (step S33), and the process moves to step S35. On the other hand, when the amount of gray water accumulated in the tank body 21a of the second tank 21 is equal to or greater than the predetermined upper limit amount (step S32: YES), the control unit 50 causes the second pump 31 to collect water in the tank body 21a of the second tank 21. The gray water is supplied to the first purification device 10 (step S34), and the process moves to step S35. Therefore, it is possible to prevent a situation where too much water accumulates in the tank body 21a and the tank body 21a overflows.

The control unit 50 checks whether the water circulation purification system S has been powered off in step S35 (step S35). If there is no operation to turn off the power of the water circulation purification system S (step S35: NO), the control unit 50 shifts the process to step S30. If there is an operation to turn off the power of the water circulation purification system S (step S35: YES), the control unit 50 ends the process.

<Other variations>
In addition, in the water circulation purification system S according to the present embodiment, gray water accumulated in the tank body 40a of the rainwater tank 40 is removed from the first purification device when the amount of clean water accumulated in the first tank 11 decreases below a predetermined amount. However, when the amount of gray water accumulated in the second tank 21 decreases below a predetermined amount, the water may be supplied to the second tank 21.

Furthermore, although the water circulation purification system S according to the present embodiment uses only internally circulating water, the system is not limited to this, and water may be supplied from the outside. For example, clean water may be supplied to the first tank 11 from the outside, and clean water or gray water may be supplied to the second tank 21 from the outside.

10 First purification device 11 First tank 12 Shower hand washing device (first usage equipment)
20 Second purification device 22 Toilet (second usage equipment)
50 Control part S Water circulation purification system

Claims

A first usage facility that uses tap water to discharge gray water;
a first purification device that purifies gray water discharged by the first usage equipment into clean water;
a first tank that stores clean water purified by the first purification device and to be used by the first usage equipment;
A second usage facility that discharges sewage using gray water;
a second purification device that purifies sewage discharged by the second usage equipment into gray water for use by the second usage equipment;
a control unit that controls the first purification device to purify gray water purified by the second purification device into clean water when the amount of clean water accumulated in the first tank is less than a predetermined amount; Equipped with a water circulation purification system.
a second tank that stores gray water that has been purified by the second purification device and is to be used by the second usage equipment;
a supply device that supplies gray water accumulated in the second tank to the first purification device,
The control unit includes:
According to claim 1, the supply device is controlled to supply gray water accumulated in the second tank to the first purification device when the amount of clean water accumulated in the first tank is less than the predetermined amount. water circulation purification system.
comprising a first measurement unit that measures the amount of clean water accumulated in the first tank,
When the amount of clean water accumulated in the first tank measured by the first measurement unit is less than the predetermined amount, the control unit causes the supply device to supply gray water accumulated in the second tank to the second tank. The water circulation purification system according to claim 2, wherein the water circulation purification system is supplied to one purification device.
A rainwater tank that collects rainwater,
and a stored rainwater amount measurement unit that measures the amount of water collected in the rainwater tank,
The control unit includes:
If the amount of clean water accumulated in the first tank measured by the first measuring section is less than the predetermined amount, and the amount of rainwater accumulated in the rainwater tank measured by the accumulated rainwater amount measuring section is a predetermined amount. If the amount is greater than the lower limit, causing the supply device to supply rainwater accumulated in the rainwater tank to the first purification device,
If the amount of clean water accumulated in the first tank measured by the first measuring section is less than the predetermined amount, and the amount of rainwater accumulated in the rainwater tank measured by the accumulated rainwater amount measuring section is less than the predetermined amount, The water circulation purification system according to claim 3, wherein when the amount is less than a predetermined lower limit, the supply device is made to supply the gray water accumulated in the second tank to the first purification device.
comprising a second measurement unit that measures the amount of gray water accumulated in the second tank,
When the amount of clean water accumulated in the first tank measured by the first measurement section is less than the predetermined amount, and the amount of clean water accumulated in the second tank measured by the second measurement section, The water circulation purification system according to claim 3 or 4, wherein when the amount of gray water is larger than a predetermined upper limit amount, the supply device is made to supply the gray water accumulated in the second tank to the first purification device.
The water circulation purification system according to any one of claims 1 to 5, further comprising a second supply device capable of supplying the clean water accumulated in the first tank to the second utilization facility.