JPWO2020022311A1 - Water treatment equipment - Google Patents

Abstract

The water treatment device 100 includes a main flow path 1 and a circulation flow path 2. The circulation flow path 2 branches from the downstream connection position LOC located relatively downstream of the main flow path 1, is positioned relatively upstream of the main flow path 1, and joins the upstream connection position UPC. The water treatment unit 3 is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, and improves the water quality of the water flowing through the main flow path 1.

Description

The present disclosure relates to a water treatment apparatus.

Conventionally, water treatment devices for treating raw water such as water from wells, rivers or ponds, or rainwater have been developed. As disclosed in Patent Document 1 (see FIG. 1), the water treatment apparatus includes a main flow path and a circulation flow path branched from the main flow path. In such a water treatment apparatus, the water quality is improved a plurality of times by circulating the raw water a plurality of times through a part of the main flow path and the circulation flow path alternately. As a result, the treated water having a water quality higher than a predetermined standard is prepared and then sent out to the downstream of the main flow path.

Japanese Unexamined Patent Publication No. 2013-86034 (Patent No. 59862626)

In the water treatment apparatus disclosed in Patent Document 1 described above, when a problem occurs in the circulation flow path or the tank connected to the circulation flow path, the main flow path does not go through the circulation flow path. It is necessary to flush the raw water only. On the other hand, in the water treatment apparatus disclosed in Patent Document 1 described above, a water treatment unit such as a filtration unit and an oxidizing agent supply unit is connected to the circulation flow path. Therefore, when the above-mentioned problem occurs, if the raw water flows only through the main flow path without passing through the circulation flow path, it is used by the user without the water quality being improved even once by the water treatment unit. It ends up. However, from the viewpoint of ensuring water quality better than a certain standard, in any case, it is preferable that the water quality of the raw water is improved by the water treatment unit at least once.

The present disclosure has been made in view of the problems of the prior art. An object of the present disclosure is to provide a water treatment apparatus in which raw water is supplied to a user at least once in a state where the water quality is improved by the water treatment unit in any case.

In order to solve the above problems, the water treatment apparatus according to the first aspect of the present disclosure includes a main flow path that guides water from upstream to downstream and a downstream side that is positioned relatively downstream of the main flow path. A circulation flow path that branches from the connection position and joins the upstream side connection position located relatively upstream of the main flow path, and the water that is connected to the circulation flow path and flows through the circulation flow path. A pump that is connected to the main flow path between the upstream side connection position and the downstream side connection position and sends out the water from the upstream side to the downstream side in the main flow path, and the upstream side connection position and the said A water treatment unit that is connected to the main flow path between the downstream connection position and improves the water quality of the water flowing through the main flow path, and is connected to the main flow path upstream of the upstream connection position, or is connected to the main flow path. , Connected to the main flow path between the upstream side connection position and the downstream side connection position, and connected to the water quality measurement sensor for measuring the water quality of the water and the main flow path on the upstream side of the upstream side connection position. A first on-off valve that switches between an open state that allows water to pass through and a closed state that does not allow water to pass through, and an open that is connected to the main flow path on the downstream side of the downstream connection position and allows water to pass through. A second on-off valve that switches between a state and a closed state that does not allow water to pass through, and an open state that is connected to the circulation flow path between the tank and the upstream connection position and allows water to pass through. A third on-off valve that switches to any of the closed states that do not allow water to pass through, and an open state that allows the water to pass through and is connected to the circulation flow path between the tank and the downstream connection position. It is provided with a fourth on-off valve that switches to any of the closed states that do not allow the water to pass through.

The water treatment apparatus according to the second aspect of the present disclosure branches from a main flow path that guides water from upstream to downstream and a downstream connection position located relatively downstream of the main flow path, and is said to be the main stream. A circulation flow path that joins an upstream side connection position located relatively upstream of the road, a tank that is connected to the circulation flow path and stores the water that flows through the circulation flow path, and the upstream side. Between the pump connected to the main flow path between the side connection position and the downstream connection position and sending the water from the upstream to the downstream in the main flow path, and between the upstream side connection position and the downstream side connection position. A water treatment unit that is connected to the main flow path and improves the quality of the water flowing through the main flow path, and is connected to the main flow path upstream of the upstream side connection position, or is connected to the upstream side connection position and the said. A water quality measurement sensor connected to the main flow path between the downstream connection position and measuring the water quality of the water, and the main flow path provided at the upstream connection position and upstream of the upstream connection position. The upstream side passage state in which water flows from the upstream side connection position to the downstream side connection position to the main flow path, and the upstream side connection position and the downstream side from the circulation flow path downstream of the tank. An upstream side flow path switching valve that can be switched to any of the upstream side circulation states flowing to the main flow path between the side connection position and the downstream side connection position, and the water is provided at the upstream side connection position and the downstream side connection position. The downstream passage state in which the water flows from the main flow path to the side connection position to the main flow path downstream of the downstream connection position, and the upstream connection position from the circulation flow path downstream of the tank. It is provided with a downstream flow path switching valve that can be switched to any of the downstream circulation states flowing to the main flow path between the and the downstream connection position.

FIG. 1 is a diagram for explaining the overall configuration of a water treatment system incorporating the water treatment apparatus of the first embodiment. FIG. 2 is a functional block diagram relating to the control of the water treatment apparatus according to the first embodiment. FIG. 3 is a flowchart for explaining the process executed by the control unit of the water treatment apparatus according to the first embodiment. FIG. 4 is a diagram for explaining the overall configuration of a water treatment system incorporating the water treatment apparatus of the second embodiment. FIG. 5 is a flowchart for explaining the process executed by the control unit of the water treatment apparatus according to the second embodiment. FIG. 6 is a diagram for explaining the overall configuration of a water treatment system incorporating the water treatment apparatus of the third embodiment. FIG. 7 is a functional block diagram relating to the control of the water treatment apparatus according to the third embodiment. FIG. 8 is a flowchart for explaining the process executed by the control unit of the water treatment apparatus according to the third embodiment. FIG. 9 is a diagram for explaining the overall configuration of a water treatment system incorporating the water treatment apparatus of the fourth embodiment. FIG. 10 is a flowchart for explaining the process executed by the control unit of the water treatment apparatus according to the fourth embodiment.

Hereinafter, the water treatment apparatus of each embodiment will be described with reference to the drawings. In the following plurality of embodiments, the portions having the same reference numerals have the same functions as each other, even if there are some differences in the shapes on the drawings, unless otherwise specified. do.

(Embodiment 1)
The water treatment apparatus 100 and the water treatment system 1000 of the first embodiment will be described with reference to FIGS. 1 to 3.

First, the overall configuration of the water treatment system 1000 of the present embodiment will be described with reference to FIG.

As shown in FIG. 1, a water treatment device 100 is connected to the water treatment system 1000 of the present embodiment. The water treatment device 100 includes a main flow path 1, a circulation flow path 2, a tank TS, a pump P, a water treatment unit 3, and a water quality measurement sensor WQS. The water treatment device 100 includes a first on-off valve V1, a second on-off valve V2, a third on-off valve V3, and a fourth on-off valve V4.

The water treatment device 100 includes a main flow path 1 that guides water from a water source W such as a well water existing underground or a water pipe buried underground to a house H from upstream to downstream. .. In the main flow path 1, the raw water flows to the water treatment unit 3, the water quality is improved by the water treatment unit 3, and then the treated water flows downstream.

A water quality measurement sensor WQS, a first on-off valve V1, a pump P, a water treatment unit 3, and a second on-off valve V2 are connected to the main flow path 1 in this order from upstream to downstream. The water treatment device 100 of the present embodiment includes a control unit C that controls the operating state of the water treatment device 100. Specifically, the control unit C controls the first to fourth on-off valves V1, V2, V3, V4, the pump P, and the water treatment unit 3. A secondary tank TL is connected to the main flow path 1 downstream of the water treatment device 100. Treated water flows into the secondary tank TL. The secondary tank TL has a capacity larger than that of the tank TS connected to the circulation flow path 2.

The main flow path 1 extends from the secondary tank TL to the discharge port U in the house H. The discharge port U is provided with a faucet that can be operated by the user. The user in the house H uses the treated water discharged from the discharge port U after flowing to the discharge port U via the main flow path 1.

A circulation flow path 2 is connected to the main flow path 1. Both ends of the circulation flow path 2 are the upstream connection position UPC of the main flow path 1 between the first on-off valve V1 and the pump P, and the main flow between the water treatment unit 3 and the second on-off valve V2, respectively. It is connected to the downstream connection position LOC of the road 1.

In other words, the circulation flow path 2 branches from the downstream connection position LOC located relatively downstream of the main flow path 1, and the upstream connection position UPC positioned relatively upstream of the main flow path 1. Meet at.

A tank TS is connected to the circulation flow path 2. A third on-off valve V3 is connected to the circulation flow path 2 between the upstream connection position UPC and the tank TS. A fourth on-off valve V4 is connected to the circulation flow path 2 between the downstream connection position LOC and the tank TS.

The tank TS is connected to the circulation flow path 2 and stores water flowing through the circulation flow path 2. The pump P is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, more specifically, the main flow path 1 between the upstream side connection position UPC and the water treatment unit 3, and is mainstream. Water is pumped from upstream to downstream on road 1.

The water treatment unit 3 is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, more specifically, the main flow path 1 between the pump P and the downstream side connection position LOC, and is mainstream. It improves the quality of the water flowing through the road 1, that is, changes the raw water into treated water. Water treatment unit 3 includes an ozone generator and mixing section O ₃ as an oxidizing agent supply unit and a filtration unit F. Therefore, the foreign matter contained in the raw water is removed when passing through the filtration unit F. In the present embodiment, the filtration unit F is a sand filtration unit containing manganese sand. Further, the raw water is sterilized by bubbles of ozone is mixed from the ozone generator and mixing section O _3.

However, the water treatment unit 3 may include an iron removing device that removes an iron component from the raw water flowing through the main flow path 1. Further, the water treatment unit 3 may include a hard water softening device that softens hard water by removing calcium ions and magnesium ions from the raw water flowing through the main flow path 1. That is, the water treatment unit 3 may include any device as long as it improves the water quality from some viewpoint.

The tank TS stores treated water whose water quality has been improved once or multiple times by the water treatment unit 3. The secondary tank TL is either treated water whose water quality has been improved only once by the water treatment unit 3 without being stored in the tank TS, or treated water whose water quality has been improved by repeating it multiple times by the water treatment unit 3. It stores water.

A water level sensor WHS1 for measuring the water level of the water stored in the tank TS is provided in the tank TS. In the secondary tank TL, a water level sensor WHS2 for measuring the water level of the water stored in the secondary tank TL is provided.

The first on-off valve V1 is connected to the main flow path 1 on the upstream side of the upstream side connection position UPC. The first on-off valve V1 is switched between an open state in which water passes and a closed state in which water does not pass. The second on-off valve V2 is connected to the main flow path 1 on the downstream side of the downstream connection position LOC. The second on-off valve V2 is also switched between an open state in which water passes and a closed state in which water does not pass.

The third on-off valve V3 is connected to the circulation flow path 2 between the tank TS and the upstream connection position UPC. The third on-off valve V3 is also switched between an open state in which water passes and a closed state in which water does not pass. The fourth on-off valve V4 is connected to the circulation flow path 2 between the tank TS and the downstream connection position LOC. The fourth on-off valve V4 is also switched between an open state in which water passes and a closed state in which water does not pass.

According to the above configuration, the raw water is supplied to the user at least once by the water treatment unit 3 in a state where the water quality is improved.

The water quality measurement sensor WQS is connected to the main flow path 1 upstream of the upstream connection position UPC. More specifically, the water quality measurement sensor WQS is connected to the main flow path 1 upstream of the first on-off valve V1. As a result, the control unit C receives information that can identify the water quality of the water measured by the water quality measurement sensor WQS. In this embodiment, the water quality measurement sensor WQS may be the concentration of bacteria to be destroyed by the ozone generator and mixing section O _3. Further, it may be the ratio of the foreign matter to be filtered by the filtration unit F to the water.

The control unit C controls the pump P, the water treatment unit 3, the first on-off valve V1, the second on-off valve V2, the third on-off valve V3, and the fourth on-off valve V4. The control unit C includes a water quality determination unit (S9 in FIG. 3, which will be described later) for determining whether or not the water quality measured by the water quality measurement sensor WQS is improved from a predetermined standard. The control unit C controls the water treatment unit 3 to improve the water quality of the water flowing through the main flow path 1 by causing the pump P to flow water through the main flow path 1. In this state, when the water quality determination unit (S9 in FIG. 3 described later) determines that the water quality is improved from the predetermined standard, the control unit C has the first on-off valve V1 and the second on-off valve. V2 is opened and the third on-off valve V3 and the fourth on-off valve V4 are closed.

According to the water treatment device 100 of the present embodiment, for example, the tank TS or the circulation flow path 2 may fail and raw water may not be able to flow through the circulation flow path 2. Even in this case, the raw water is supplied to the user as treated water in a state where the water quality is improved at least once by the water treatment unit 3. Specifically, in both the manual operation and the automatic operation described later, the raw water is supplied to the user as treated water in a state where the water quality is improved at least once by the water treatment unit 3. Further, even if the water quality measurement sensor WQS fails, the operation of the water treatment device 100 may not be stopped. In this case, the first on-off valve V1 and the second on-off valve V2 are opened, and the third on-off valve V3 and the fourth on-off valve V4 are closed by manual operation. As a result, even in this case, the raw water is supplied to the user as treated water with the water quality improved at least once by the water treatment unit 3.

The water treatment device 100 of the present embodiment is controlled by the control unit C and includes a display unit D that displays predetermined information. The display unit D displays, for example, whether the current operating state of the water treatment device 100 is an automatic operating state or a manual operating state. When the display unit D indicates that the current operating state of the water treatment device 100 is the manual operating state, the control unit C opens the first on-off valve V1 and the second on-off valve V2, and opens the first on-off valve V1 and the second on-off valve V2. At the same time, the third on-off valve V3 and the fourth on-off valve V4 are closed. Whether the current driving state is set to the automatic driving state or the manual driving state is determined by the user operating the driving course selection unit S to select.

As a result, the user manually operates the operation course selection unit S when, for example, the circulation flow path 2 or the tank TS is damaged due to an earthquake or the like. Thereby, the state of the water treatment device 100 can be changed to a state in which water passes only through the main flow path 1 without passing through the circulation flow path 2. For example, the user opens the first on-off valve V1 and the second on-off valve V2 by touching the manual operation icon (or one-pass icon) of the driving course selection unit S, and the third on-off valve V3 and the third on-off valve V3 and The fourth on-off valve V4 can be closed. As a result, the well water or tap water supplied from the water source W does not flow into the circulation flow path 2, but flows only through the main flow path 1 to reach the secondary tank TL. As a result, the user can use the treated water with improved water quality at least once in the water treatment unit 3 even when the tank TS or the circulation flow path 2 is out of order.

Next, the control unit C of the water treatment apparatus 100 of the present embodiment and the configuration related thereto will be described with reference to FIG.

As shown in FIG. 2, the control unit C receives each command signal transmitted from each of the operation course selection unit S, the water level sensor WHS1, the water level sensor WHS2, the water quality measurement sensor WQS, and the power switch SW.

The operation course selection unit S is a selection switch for the user to select, by operation, whether the operation state of the water treatment device 100 is the automatic operation state or the manual operation. The selection switch is, for example, a selection icon displayed on the liquid crystal display panel of the display unit D.

The water level sensor WHS1 measures the water level of the water in the tank TS and transmits the measured water level information to the control unit C. Specifically, the water level sensor WHS1 notifies each time when the water level in the tank TS becomes equal to or higher than the upper limit water level WH and when the water level in the tank TS becomes equal to or lower than the lower limit water level WL. Information is transmitted to the control unit C.

The water level sensor WHS2 measures the water level of the water in the tank TL and transmits the measured water level information to the control unit C. Specifically, the water level sensor WHS2 is used when the water level in the secondary tank TL becomes equal to or higher than the upper limit water level WH and when the water level in the secondary tank TL becomes equal to or lower than the lower limit water level WL. , The information notifying each is transmitted to the control unit C.

The water quality measurement sensor WQS measures the water quality of the water flowing through the main flow path 1 upstream of the upstream connection position UPC, and transmits the measured water quality information to the control unit C. The water quality measurement sensor WQS is connected to the main flow path 1 upstream of the first on-off valve V1, but even if it is connected to the main flow path 1 between the first on-off valve V1 and the upstream connection position UPC. good.

When operated by the user, the power switch SW transmits a command signal for instructing the control unit C to be in the driving state to the control unit C. As a result, the control unit C is activated and receives each information from the operation course selection unit S, the water level sensor WHS1, the water level sensor WHS2, and the water quality measurement sensor WQS.

Control unit C based on each information thereof received, an ozone generator and mixing section O ₃ as an oxidizing agent supply _unit, the pump P, the first on-off valve V1, the second on-off valve V2, the third on-off valve Each control signal is transmitted to each of V3, the fourth on-off valve V4, and the display unit D.

Ozone generation and mixing unit O _3, by being controlled based on a control signal transmitted from the control station C, a water flowing in the main flow path 1 between the upstream connecting position UPC and downstream connection position LOC Supply ozone as an oxidant. The pump P is controlled based on the control signal transmitted from the control unit C so that water flows from the upstream to the downstream in the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC. Driven by.

The first on-off valve V1, the second on-off valve V2, the third on-off valve V3, and the fourth on-off valve V4 are each controlled based on the control signal transmitted from the control unit C. , It is switched between an open state that allows water to pass through and a closed state that does not allow water to pass through. The display unit D displays whether the current operation state is the automatic operation state or the manual operation state by being controlled based on the control signal transmitted from the control unit C.

Next, with reference to FIG. 3, each process in the control executed by the control unit C of the water treatment apparatus 100 of the present embodiment will be described.

In step S1, the control unit C determines whether or not the water level in the secondary tank TL is equal to or higher than the upper limit water level WH based on the signal transmitted from the water level sensor WHS2.

In step S1, when the water level of the water in the secondary tank TL is determined to be equal to or greater than the upper limit water level WH, in step S3, the control unit C, pump P and ozone generator and mixing section O ₃ to OFF The setting is made, and the processes of step S1 and step S3 are repeated. Therefore, if the water level in the secondary tank TL is equal to or higher than the upper limit water level WH, the water treatment device 100 is not driven.

The reason for performing such a treatment is that if the water level in the secondary tank TL is equal to or higher than the upper limit water level WH, the treated water may overflow from the secondary tank TL. Therefore, in this case, the control unit C stops the pump P. As a result, the treated water is not replenished from the tank TS to the secondary tank TL.

If it is determined in step S1 that the water level in the secondary tank TL has not reached the upper limit water level WH, the control unit C determines in step S2 that the water level in the secondary tank TL is the lower limit water level WL. Determine if it is as follows. If it is determined in step S2 that the water level of the water in the secondary tank TL is not equal to or lower than the lower limit water level WL, the process of step S3 is executed.

That is, even if the water level in the secondary tank TL is equal to or lower than the upper limit water level WH, if more treated water remains in the secondary tank TL than the lower limit water level WL, the control unit C may perform the control unit C. Do not drive the water treatment device 100. The reason for performing such a treatment is that the amount of water in the secondary tank TL is greater than the amount required by the user. Therefore, even in this case, the control unit C stops the pump P. As a result, the treated water is not replenished from the tank TS to the secondary tank TL.

On the other hand, in step S2, if it is determined that the water level of the water in the secondary tank TL is equal to or less than a lower limit water level WL in step S4, the control unit C is ozone generation and mixing unit O ₃ and pump P Drive. As a result, water flows from upstream to downstream in the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC. Also, ozone as an oxidizing agent is supplied to the water flowing in the main flow path 1 between the ozone generator and mixing section O ₃ the upstream connection position UPC and downstream connection position LOC.

After step S4, in step S5, it is determined whether or not the user has selected automatic operation as the current operation status of the water treatment device 100 by operating the operation course selection unit S. In step S5, as the current operation status of the water treatment device 100, it may be determined that one-pass (manual) operation by the user is selected by the operation of the operation course selection unit S instead of automatic operation. In this case, in step S6, the control unit C causes the display unit D to display information that can identify that the current operation status is one-pass (manual) operation.

The one-pass (manual) operation is an operation in which water does not flow in the circulation flow path 2 and water flows only in the main flow path 1. As a result, the display unit D displays that the current operating status of the water treatment device 100 is in the one-pass state. As a result, the user can change the current state of the water treatment device 100 to the secondary tank through only the main flow path 1 without passing through the circulation flow path 2 for the treated water whose water quality has been improved by the water treatment unit 3. It is possible to understand that it is possible to make it ready to be sent to TL.

That is, the operation course selection unit S for selecting whether the current operation state of the water treatment device 100 is the automatic operation state or the manual operation state is provided. The control unit C may determine that the current driving state is selected to be the manual driving state by the operation of the driving course selection unit S by the user.

In this case, in step S7, the control unit C opens each of the first on-off valve V1 and the second on-off valve V2, while opening each of the third on-off valve V3 and the fourth on-off valve V4. close up. As a result, the treated water whose water quality has been improved by the water treatment unit 3 is actually sent to the secondary tank TL through only the main flow path 1 without passing through the circulation flow path 2. After that, the process of step S1 is executed.

On the other hand, in step S5, it may be determined that automatic operation is selected by the operation course selection unit S as the current operation status of the water treatment device 100. In this case, in step S9, the control unit C has the water quality as a predetermined reference based on the water quality information of the water flowing through the main flow path 1 upstream of the upstream connection position UPC transmitted from the water quality measurement sensor WQS. Determine if it is better or not.

If it is determined in step S9 that the water quality is better than the predetermined standard, the control unit C executes the process of step S7. As a result, the water from the water source W or the treated water with improved water quality in the tank TS passes through the upstream connection position UPC, the water treatment unit 3, and the downstream connection position LOC to the secondary tank TL. Sent. On the other hand, if it is determined in step S9 that the water quality is not better than the predetermined reference, the control unit C determines the circulation time in step S10. The circulation time is the time during which so-called water circulation occurs, in which water alternately flows through the circulation flow path 2 and a part of the main flow path 1. In the circulation time, the water is repeatedly improved in water quality by the water treatment unit 3. The better the water quality measured by the water quality measurement sensor WQS, the shorter the circulation time is set, and the worse the water quality measured by the water quality measurement sensor WQS, the longer the circulation time is set.

Then, in step S11, the control unit C opens each of the first on-off valve V1 and the fourth on-off valve V4, while closing each of the second on-off valve V2 and the third on-off valve V3. At this time, the pump P is being driven. Therefore, water that has not yet been improved water quality, water quality measurement sensor WQS, the first on-off valve V1, the upstream-side connection location UPC, the pump P, filtration unit F, an ozone generator and mixing section O _3, downstream connection position LOC , And is guided to the tank TS via the fourth on-off valve V4. As a result, the treated water gradually increases in the tank TS, and the water level rises.

In step S12, the control unit C determines whether or not the water level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH. In step S12, it may be determined that the water level of the treated water stored in the tank TS is not equal to or higher than the upper limit water level WH. In this case, step S12 is repeated. At this time, since the pump P continues to be driven, the water level of the treated water in the tank TS gradually rises.

In step S12, it may be determined that the water level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH. In this case, in step S13, the control unit C closes the first on-off valve V1 and the second on-off valve V2, and opens the third on-off valve V3 and the fourth on-off valve V4. As a result, the water stored in the tank TS moves from the circulation flow path 2 to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC. After that, the water moves from the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC to the circulation flow path 2. That is, the so-called circulation cycle is repeated. After that, in step S14, the control unit C determines whether or not the circulation time determined in step S10 has elapsed.

In step S14, if the control unit C determines that the circulation time has not elapsed, it determines that the treated water stored in the tank TS has not yet become better than the predetermined standard. Then, the state set in step S13 is maintained. At this time, the pump P is being driven. Therefore, the water flows alternately between the circulation flow path 2 and the main flow path 1. As a result, the water circulates and the water quality is repeatedly improved by the water treatment unit 3. As a result, the quality of the water gradually improves over time. As described above, the circulation time is a predetermined time according to the degree of superiority or inferiority of the water quality measured by the water quality measurement sensor WQS.

In step S14, if the control unit C determines that the circulation time has elapsed, it considers that the treated water stored in the tank TS has already become better than the predetermined standard. .. As a result, in step S15, the control unit C opens each of the second on-off valve V2 and the third on-off valve V3, while closing each of the first on-off valve V1 and the fourth on-off valve V4. At this time, the pump P is in the driving state. Therefore, the treated water stored in the tank TS passes through the third on-off valve V3, the upstream side connection position UPC, the water treatment unit 3, the downstream side connection position LOC, and the second on-off valve V2. Then, it is sent to the secondary tank TL.

After that, in step S16, the control unit C determines whether or not the water level of the treated water in the tank TS is equal to or lower than the lower limit water level WL based on the information transmitted from the water level sensor WHS1. In step S16, if the water level of the treated water in the tank TS is not equal to or lower than the lower limit water level WL, the control unit C repeats the determination in step S16. At this time, the pump P continues to drive. Therefore, the treated water in the tank TS passes through the third on-off valve V3, the upstream side connection position UPC, the water treatment unit 3, the downstream side connection position LOC, and the second on-off valve V2, and then the secondary tank. Continues to be sent to TL. On the other hand, if it is determined in step S16 that the water level of the treated water in the tank TS is equal to or lower than the lower limit water level WL, the control unit C again executes the process of step S1.

(Embodiment 2)
The water treatment apparatus 100 and the water treatment system 1000 of the second embodiment will be described with reference to FIGS. 4 and 5.

First, the overall configuration of the water treatment apparatus 100 and the water treatment system 1000 of the present embodiment will be described with reference to FIG.

The water treatment device 100 of the present embodiment shown in FIG. 4 and the water treatment device 100 of the first embodiment shown in FIG. 1 differ only in the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. There is. In other words, the water treatment device 100 of the present embodiment shown in FIG. 4 and the water treatment device 100 of the first embodiment shown in FIG. 1 are other than the positions of the main flow path 1 to which the water quality measurement sensor WQS is connected. Has the same configuration.

Specifically, the water quality measurement sensor WQS of the water treatment device 100 of the present embodiment is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC. Specifically, the water quality measurement sensor WQS of the water treatment device 100 of the present embodiment is connected to the main flow path 1 between the water treatment unit 3 and the pump P. Therefore, the water quality measurement sensor WQS of the water treatment apparatus 100 of the present embodiment measures the water quality of the water flowing in the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC.

Since the control unit C of the water treatment apparatus 100 of the present embodiment and the configuration related thereto are the same as the configuration of the control unit C of the first embodiment and the configuration related thereto described with reference to FIG. The explanation will not be repeated.

Next, with reference to FIG. 5, each process in the control executed by the control unit C of the water treatment apparatus 100 of the present embodiment will be described.

The processing executed by the control unit C of the present embodiment of FIG. 5 and the processing executed by the control unit C of the first embodiment of FIG. 3 are step S9A, step S10A, step S11A, step S12A, step S13A, and Only the process of step S14A is different. In other words, the process executed by the control unit C in the form of FIG. 5 and the process executed by the control unit C in FIG. 3 are other than step S9A, step S10A, step S11A, step S12A, step S13A, and step S14A. , Perform the same process.

Specifically, in the process executed by the control unit C of the present embodiment shown in FIG. 5, in step S9A, the control unit C is stored in the tank TS measured by the water level sensor WHS1. It is determined whether or not the water level of the treated water is equal to or higher than the upper limit water level WH. In step S9A, it may be determined that the water level of the treated water stored in the tank TS is not equal to or higher than the upper limit water level WH. In this case, in step S10A, the control unit C opens each of the first on-off valve V1 and the fourth on-off valve V4, while opening each of the second on-off valve V2 and the third on-off valve V3. close up.

At this time, the pump P is being driven. Therefore, water passes through the first on-off valve V1, the upstream connection position UPC, the pump P, the water quality measurement sensor WQS, the water treatment unit 3, the downstream connection position LOC, and the fourth on-off valve V4, and then the tank. It flows into TS. After that, the control unit C repeats the processes of steps S9A and S10A until it is determined that the water level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH.

In step S9A, it may be determined that the water level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH. In this case, in step S11A, the control unit C determines whether or not the water quality is better than a predetermined standard based on the water quality information transmitted from the water quality measurement sensor WQS.

If it is determined in step S11A that the water quality is not better than the predetermined standard, in step S12A, the first on-off valve V1 and the second on-off valve V2 are closed, while the third on-off valve V3 and the third on-off valve V3 and The fourth on-off valve V4 is opened. As a result, the treated water circulates through a part of the main flow path 1 and the circulation flow path 2 alternately. Specifically, the treated water flows from the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC to the circulation flow path 2, and then from the circulation flow path 2 to the upstream side connection position. The operation of flowing to the main flow path 1 between the UPC and the downstream connection position LOC is repeated. As a result, the water quality is repeatedly improved by the water treatment unit 3. After that, the process of step S1 is executed.

On the other hand, in step S11A, it may be determined that the treated water has better water quality than a predetermined standard. In this case, in step S13A, the control unit C closes each of the first on-off valve V1 and the fourth on-off valve V4, while closing each of the second on-off valve V2 and the third on-off valve V3. open. At this time, the pump P is being driven. Therefore, the treated water stored in the tank TS is the third on-off valve V3, the upstream side connection position UPC, the water quality measurement sensor WQS, the water treatment unit 3, the downstream side connection position LOC, and the second open / close. It is sent to the secondary tank TL via the valve V2.

After that, in step S14A, the control unit C determines whether or not the treated water in the tank TS measured by the water level sensor WHS1 is equal to or lower than the lower limit water level WL. If it is not determined in step S14A that the treated water in the tank TS is equal to or lower than the lower limit water level WL, the control unit C repeats the determination in step S14A. On the other hand, if it is determined in step S14A that the treated water in the tank TS is equal to or lower than the lower limit water level WL, the control unit C executes the process of step S1.

According to the water treatment device 100 of the present embodiment, the water quality of the treated water flowing through the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC measured by the water quality measurement sensor WQS is predetermined. May be better than the standard. Only in this case, the treated water is sent from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the secondary tank TL. Therefore, if the circulation flow path 2 and the tank TS are not out of order, the user can more surely perform the secondary tank TL having better water quality than the predetermined standard as compared with the water treatment device 100 of the first embodiment. The treated water inside can be used.

Even in the case where the tank TS fails and the raw water cannot flow into the circulation flow path 2 by the water treatment device 100 of the present embodiment, the water quality of the raw water is improved by the water treatment unit 3 at least once. It is supplied to the user as treated water in a fresh state. Further, even in the case of the water treatment device 100 of the present embodiment, in both the manual operation and the automatic operation, the raw water is treated as water in a state where the water quality is improved at least once by the water treatment unit 3. Supplied to the user.

(Embodiment 3)
The water treatment apparatus 100 and the water treatment system 1000 of the third embodiment will be described with reference to FIGS. 6 to 8.

First, the overall configuration of the water treatment apparatus 100 and the water treatment system 1000 of the present embodiment will be described with reference to FIG.

The water treatment device 100 of the present embodiment includes a main flow path 1, an upstream side connection position UPC, a downstream side connection position LOC, a circulation flow path 2, a tank TS, a pump P, a water treatment unit 3, and a water quality measurement sensor WQS. I have. These configurations are the same as the corresponding configurations of the first embodiment. However, the water treatment device 100 of the present embodiment includes an upstream side flow path switching valve SWV1 and a downstream side flow path switching valve SWV2.

Therefore, in the water treatment device 100 of the present embodiment of FIG. 6 and the water treatment device 100 of the first embodiment of FIG. 1, the first to fourth on-off valves V1, V2, V3, and V4 are upstream flow paths. The only difference is that it is replaced by the switching valve SWV1 and the downstream flow path switching valve SWV2. In other words, in the water treatment device 100 of FIG. 6 and the water treatment device 100 of FIG. 1, the first to fourth on-off valves V1, V2, V3, and V4 are the upstream side flow path switching valve SWV1 and the downstream side flow path switching. It has the same configuration except that it is replaced by the valve SWV2. The upstream side flow path switching valve SWV1 and the downstream side flow path switching valve SWV2 are so-called three-way valves, respectively.

The upstream side flow path switching valve SWV1 is provided at the upstream side connection position UPC, which is a relatively upstream side connection position between the main flow path 1 and the circulation flow path 2. The upstream side flow path switching valve SWV1 is switched to either an upstream side passing state or an upstream side circulation state. The upstream side passing state is a state in which water flows from the main flow path 1 upstream of the upstream side connection position UPC to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC. The upstream circulation state is a state in which water flows from the circulation flow path 2 downstream of the tank TS to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC.

The downstream flow path switching valve SWV2 is provided at the downstream connection position LOC, which is a connection position on the relatively downstream side between the main flow path 1 and the circulation flow path 2. The downstream flow path switching valve SWV2 is switched to either a downstream passing state or a downstream circulation state. The downstream passage state is a state in which water flows from the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC to the main flow path 1 downstream of the downstream side connection position LOC. The downstream circulation state is a state in which water flows from the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC to the circulation flow path 2 upstream of the tank TS.

Also in the water treatment apparatus 100 of the present embodiment, the raw water is supplied to the user in a state where the water quality is improved at least once by the water treatment unit 3.

Further, also in the present embodiment, the water quality measurement sensor WQS is connected to the main flow path 1 upstream of the upstream connection position UPC as in the first embodiment. Therefore, the control unit C receives the information that can identify the water quality of the water measured by the water quality measurement sensor WQS. Further, the control unit C controls the pump P, the water treatment unit 3, the upstream side flow path switching valve SWV1, and the downstream side flow path switching valve SWV2.

Further, the control unit C includes a water quality determination unit (S9 in FIG. 8) for determining whether or not the water quality measured by the water quality measurement sensor WQS is better than a predetermined reference. The control unit C is in a state in which the pump P flows water through the main flow path 1 and the water treatment unit 3 executes control for improving the water quality of the water flowing through the main flow path 1. In this state, the water quality determination unit (S9 in FIG. 8) may determine that the water quality is better than a predetermined standard. In this case, the control unit C puts the upstream side flow path switching valve SWV1 in the upstream side passing state and puts the downstream side flow path switching valve SWV2 in the downstream side passing state.

As a result, water is sent to the secondary tank TL via the water quality measurement sensor WQS, the upstream side flow path switching valve SWV1, the water treatment unit 3, and the downstream side flow path switching valve SWV2. That is, the water does not flow into the circulation flow path 2, but flows only through the main flow path 1 and is sent to the secondary tank TL.

Therefore, even with the water treatment device 100 of the present embodiment, in both the manual operation and the automatic operation, the raw water is treated as water in a state where the water quality is improved at least once by the water treatment unit 3. Supplied to the user.

Also in the present embodiment, the water treatment device 100 includes a display unit D that displays whether the current state is the state of automatic operation or the state of manual operation. When the display unit D indicates that it is in the manual operation state, the upstream side flow path switching valve SWV1 is manually set to the upstream side passing state, and the downstream side flow path switching valve SWV2 is passed through the downstream side. Can be in a state. Specifically, the user sets the upstream side flow path switching valve SWV1 to the upstream side passing state and the downstream side flow path switching valve SWV2 to the downstream side passing state by operating the operation course selection unit S. Can be done.

Next, the control unit C of the water treatment apparatus 100 of the present embodiment and the configuration related thereto will be described with reference to FIG. 7.

The related configuration of the control unit C of the present embodiment of FIG. 7 and the related configuration of the control unit C of the first embodiment of FIG. 2 are such that the first to fourth on-off valves V1, V2, V3 and V4 are on the upstream side. It differs only in that it is replaced by the flow path switching valve SWV1 and the downstream flow path switching valve SWV2. In other words, in the related configuration of the control unit C in FIG. 7 and the related configuration of the control unit C in FIG. 2, the first to fourth on-off valves V1, V2, V3, V4 are the upstream side flow path switching valve SWV1 and the downstream. It is the same except that it is replaced with the side flow path switching valve SWV2.

In the present embodiment, the control unit C replaces the first to fourth on-off valves V1, V2, V3, and V4 with the upstream side flow path switching valve SWV1 and the downstream side flow path switching valve SWV2, respectively. To control.

Next, with reference to FIG. 8, each process in the control executed by the control unit C of the water treatment apparatus 100 of the present embodiment will be described.

The processing of the control unit C of the present embodiment shown in FIG. 8 is the same as the processing of the control unit C of the first embodiment shown in FIG. 3 only in steps S7C, S11C, S13C, and S15C. different. Specifically, the operations of the first to fourth on-off valves V1, V2, V3, V4 of the first embodiment are replaced with the operations of the upstream side flow path switching valve SWV1 and the downstream side flow path switching valve SWV2. There is. Regarding the other processes, the process of the control unit C of the present embodiment shown in FIG. 8 and the process of the control unit C of the first embodiment shown in FIG. 3 are the same.

Specifically, in step S7C, the control unit C sets the upstream side flow path switching valve SWV1 in the upstream side passing state and the downstream side flow path switching valve SWV2 in the downstream side passing state. As a result, water is sent to the secondary tank TL via the water quality measurement sensor WQS, the upstream side flow path switching valve SWV1, the water treatment unit 3, and the downstream side flow path switching valve SWV2. That is, the water does not flow into the circulation flow path 2, but flows only through the main flow path 1 and is sent to the secondary tank TL.

In step S11C, the control unit C puts the upstream side flow path switching valve SWV1 into the upstream side passing state and puts the downstream side flow path switching valve SWV2 into the downstream side circulation state. As a result, water is sent to the tank TS via the water quality measurement sensor WQS, the upstream side flow path switching valve SWV1, the water treatment unit 3, and the downstream side flow path switching valve SWV2. That is, the water flows from the main flow path 1 to the circulation flow path 2 via the downstream connection position LOC, and is sent to the tank TS instead of the secondary tank TL.

In step S13C, the control unit C puts the upstream side flow path switching valve SWV1 into the upstream side circulation state and also puts the downstream side flow path switching valve SWV2 into the circulation state. As a result, the cycle in which water reaches the tank TS again from the tank TS via the upstream side flow path switching valve SWV1, the water treatment unit 3, and the downstream side flow path switching valve SWV2 is repeated. That is, the water flows from the circulation flow path 2 to the main flow path 1, and then repeats the cycle of flowing from the main flow path 1 to the circulation flow path 2.

In step S15C, the control unit C puts the upstream side flow path switching valve SWV1 into the upstream side circulation state and puts the downstream side flow path switching valve SWV2 into the downstream side passing state. As a result, water is sent from the tank TS to the secondary tank TL via the upstream side flow path switching valve SWV1, the water treatment unit 3, and the downstream side flow path switching valve SWV2. That is, the water flows from the circulation flow path 2 to the main flow path 1 and then is sent to the secondary tank TL.

Also in the water treatment device 100 of the present embodiment, it is possible to realize a water flow substantially the same as the water flow of the water treatment device 100 of the first embodiment.

According to the water treatment device 100 of the present embodiment, for example, even when the tank TS breaks down and the raw water cannot flow into the circulation flow path 2, the raw water is water quality at least once by the water treatment unit 3. Is supplied to the user as treated water in an improved state. Further, according to the water treatment apparatus 100 of the present embodiment, in both the manual operation and the automatic operation, the raw water has been treated by the water treatment unit 3 at least once with the water quality improved. Is supplied to the user as.

(Embodiment 4)
The water treatment apparatus 100 and the water treatment system 1000 of the fourth embodiment will be described with reference to FIGS. 9 and 10.

First, the overall configuration of the water treatment apparatus 100 and the water treatment system 1000 of the present embodiment will be described with reference to FIG.

The water treatment device 100 of the present embodiment shown in FIG. 9 and the water treatment device 100 of the third embodiment shown in FIG. 6 differ only in the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. There is. In other words, the water treatment device 100 of the present embodiment shown in FIG. 9 and the water treatment device 100 of the third embodiment shown in FIG. 6 are other than the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. Has the same configuration.

The water quality measurement sensor WQS of the water treatment device 100 of the present embodiment is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC. More specifically, the water quality measurement sensor WQS of the present embodiment is connected to the main flow path 1 between the water treatment unit 3 and the pump P.

Since the control unit C of the water treatment apparatus 100 of the present embodiment and the configuration related thereto are the same as the configuration of the control unit C of the third embodiment and the configuration related thereto described with reference to FIG. 7, the configuration thereof is the same. The explanation will not be repeated.

Next, the process executed by the control unit C of the water treatment apparatus 100 of the present embodiment will be described with reference to FIG.

The processing executed by the control unit C of the present embodiment of FIG. 10 and the processing executed by the control unit C of the third embodiment of FIG. 8 are step S9B, step S10B, step S11B, step S12B, step S13B, and It differs only in the process of step S14B. In other words, the control unit C of FIG. 10 and the control unit C of the third embodiment of FIG. 8 perform the same processing except for step S9B, step S10B, step S11B, step S12B, step S13B, and step S14B. Execute.

Specifically, in the process executed by the control unit C of the present embodiment shown in FIG. 10, in step S9B, the control unit C is stored in the tank TS measured by the water level sensor WHS1. It is determined whether or not the water level of the treated water is equal to or higher than the upper limit water level WH. In step S9B, it may be determined that the water level of the treated water stored in the tank TS is not equal to or higher than the upper limit water level WH. In this case, in step S10B, the control unit C puts the upstream side flow path switching valve SWV1 into the upstream side passing state, while putting the downstream side flow path switching valve SWV2 into the downstream side circulation state.

At this time, the pump P is being driven. Therefore, water is sent to the tank TS via the upstream side flow path switching valve SWV1, the water quality measurement sensor WQS, the water treatment unit 3, and the downstream side flow path switching valve SWV2. That is, the water flows into the circulation flow path 2 and is sent to the tank TS instead of the secondary tank TL. After that, the control unit C repeats the processes of steps S9B and S10B until it is determined that the water level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH.

In step S9B, it may be determined that the water level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH. In this case, in step S11B, the control unit C determines whether or not the water quality is better than a predetermined standard based on the water quality information transmitted from the water quality measurement sensor WQS.

If it is determined in step S11B that the water quality is not better than the predetermined standard, in step S12B, the upstream side flow path switching valve SWV1 is brought into the upstream side circulation state, and the downstream side flow path switching valve SWV2 is circulated on the downstream side. Put it in a state. At this time, the pump P is being driven. Therefore, the so-called circulation cycle is repeated by alternately passing the treated water through a part of the main flow path 1 and the circulation flow path 2. As a result, the water quality is repeatedly improved by the water treatment unit 3.

Specifically, the treated water flows from the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC to the circulation flow path 2, and then from the circulation flow path 2 to the upstream side connection position. The operation of flowing to the main flow path 1 between the UPC and the downstream connection position LOC is repeated. After that, the process of step S1 is executed.

On the other hand, if it is determined in step S11B that the treated water is better than a predetermined reference, in step S13B, the control unit C puts the upstream side flow path switching valve SWV1 in a circulating state and sets the upstream side flow path switching valve SWV1 in a circulating state, and the downstream side. Pass the flow path switching valve SWV2. At this time, the pump P is being driven. Therefore, the treated water stored in the tank TS is sent out to the secondary tank TL via the upstream side flow path switching valve SWV1, the water treatment unit 3, and the downstream side flow path switching valve SWV2.

After that, in step S14B, the control unit C determines whether or not the treated water in the tank TS is equal to or lower than the lower limit water level WL. If it is not determined in step S14B that the treated water in the tank TS is equal to or lower than the lower limit water level WL, the control unit C repeats the determination in step S14B. On the other hand, if it is determined in step S14B that the treated water in the tank TS is equal to or lower than the lower limit water level WL, the control unit C executes the process of step S1.

According to the above water treatment apparatus 100, even when the tank TS or the circulation flow path 2 fails and the raw water cannot flow into the circulation flow path 2, the raw water is supplied by the water treatment unit 3 at least once. It is supplied to the user as treated water with improved water quality. Further, even in the case of the water treatment device 100 of the present embodiment, in both the manual operation and the automatic operation, the raw water is treated as water in a state where the water quality is improved at least once by the water treatment unit 3. Supplied to the user.

According to the water treatment device 100 of the present embodiment, the water quality of the treated water flowing through the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC measured by the water quality measurement sensor WQS is predetermined. May be better than the standard. Only in this case, the treated water is sent from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the secondary tank TL. Therefore, the treated user in the secondary tank TL can more reliably use the treated water that is better than a predetermined standard.

(Embodiment 5)
The water treatment apparatus 100 of the above-described first to fourth embodiments is provided with the control unit C, but the control unit C may not be provided.

In the present embodiment, the first to fourth on-off valves V1, V2, V3, and V4 of the first and second embodiments described above 1 and 2 have a structure that can be opened and closed by a manual operation by a user. Therefore, if the user causes the above-mentioned first to fourth on-off valves V1, V2, V3, and V4 to open and close the operation instead of the above-mentioned control unit C, the water treatment apparatus according to the first and second embodiments. A water flow similar to 100 can be formed.

Further, in another example of the present embodiment, the upstream side flow path switching valve SWV1 and the downstream side flow path switching valve SWV2 of the above-described third and fourth embodiments can be switched by a manual operation by the user. have. Therefore, if the user causes the above-mentioned upstream side flow path switching valve SWV1 and the above-mentioned downstream side flow path switching valve SWV2 to perform the flow path switching operation instead of the above-mentioned control unit C, the water of the third and fourth embodiments can be obtained. A water flow similar to that of the treatment device 100 can be formed.

Hereinafter, the characteristic configuration of the water treatment apparatus 100 of the embodiment and the effect obtained by the characteristic configuration will be described.

(1) The water treatment device 100 includes a main flow path 1, a circulation flow path 2, a tank TS, a pump P, a water treatment unit 3, and a water quality measurement sensor WQS. The water treatment device 100 includes a first on-off valve V1, a second on-off valve V2, a third on-off valve V3, and a fourth on-off valve V4.

The main flow path 1 guides water from upstream to downstream. The circulation flow path 2 branches from the downstream connection position LOC located relatively downstream of the main flow path 1, is positioned relatively upstream of the main flow path 1, and joins the upstream connection position UPC. The tank TS is connected to the circulation flow path 2 and stores water flowing through the circulation flow path 2.

The pump P is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, and sends water from the upstream side to the downstream side in the main flow path 1. The water treatment unit 3 is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, and improves the water quality of the water flowing through the main flow path 1. The water quality measurement sensor WQS is connected to the main flow path 1 upstream of the upstream connection position UPC, or is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, and the water quality of the water. To measure.

The first on-off valve V1 is connected to the main flow path 1 on the upstream side of the upstream connection position UPC, and switches between an open state in which water passes and a closed state in which water does not pass. The second on-off valve V2 is connected to the main flow path 1 on the downstream side of the downstream connection position LOC, and switches between an open state in which water passes and a closed state in which water does not pass. The third on-off valve V3 is connected to the circulation flow path 2 between the tank TS and the upstream connection position UPC, and switches between an open state in which water passes and a closed state in which water does not pass. The fourth on-off valve V4 is connected to the circulation flow path 2 between the tank TS and the downstream connection position LOC, and switches between an open state in which water passes and a closed state in which water does not pass.

According to the above configuration, the raw water is supplied to the user at least once by the water treatment unit 3 in a state where the water quality is improved.

(2) The water quality measurement sensor WQS may be connected to the main flow path 1 upstream of the upstream connection position UPC. The water treatment device 100 receives the water quality information that can identify the water quality of the water measured by the water quality measurement sensor WQS, and receives the pump P, the water treatment unit 3, the first on-off valve V1, the second on-off valve V2, and the first. A control unit C for controlling the on-off valve V3 of No. 3 and the on-off valve V4 of the fourth on-off valve V4 is provided. The control unit C includes a water quality determination unit (S9 in FIG. 3) for determining whether or not the water quality measured by the water quality measurement sensor WQS is better than a predetermined standard. The control unit C is in a state in which the pump P flows water through the main flow path 1 and the water treatment unit 3 executes control for improving the water quality of the water flowing through the main flow path 1. In this state, when the water quality determination unit (S9 in FIG. 3) determines that the water quality is better than a predetermined reference, the control unit C sets the first on-off valve V1 and the second on-off valve V2. It opens and closes the third on-off valve V3 and the fourth on-off valve V4.

According to this, when the water quality is so good that the water does not need to flow through the circulation flow path 2, it is possible to automatically form a state in which the water flows only through the main flow path 1.

(3) An operation course selection unit S for selecting whether the current operation state of the water treatment device 100 is to be the automatic operation state or the manual operation state may be further provided. The control unit C sets the first on-off valve V1 and the second on-off valve V2 when the current operation state is selected to be the manual operation state by the operation of the operation course selection unit S by the user. It opens and closes the third on-off valve V3 and the fourth on-off valve V4. According to this, it is possible to manually form a state in which water flows only in the main flow path 1.

(4) The water treatment device 100 includes a main flow path 1, a circulation flow path 2, a tank TS, a pump P, a water treatment unit 3, and a water quality measurement sensor WQS. The water treatment device 100 includes an upstream side flow path switching valve SWV1 and a downstream side flow path switching valve SWV2.

The main flow path 1 guides water from upstream to downstream. The circulation flow path 2 branches from the downstream connection position LOC located relatively downstream of the main flow path 1 and joins the upstream connection position UPC located relatively upstream of the main flow path 1. .. The tank TS is connected to the circulation flow path 2 and stores water flowing through the circulation flow path 2. The pump P is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, and sends water from the upstream side to the downstream side in the main flow path 1. The water treatment unit 3 is connected to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC, and improves the water quality of the water flowing through the main flow path 1. The water quality measurement sensor WQS is connected to the main flow path 1 upstream of the upstream connection position UPC, or is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, and the water quality of the water. To measure.

The upstream side flow path switching valve SWV1 is provided at the upstream side connection position UPC. The upstream side flow path switching valve SWV1 is switched to either an upstream side passing state or an upstream side circulation state. The upstream side passing state is a state in which water flows from the main flow path 1 upstream of the upstream side connection position UPC to the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC. The upstream circulation state is a state in which water flows from the circulation flow path 2 downstream of the tank TS to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC.

The downstream flow path switching valve SWV2 is provided at the downstream connection position LOC. The downstream flow path switching valve SWV2 is switched to either a downstream passing state or a downstream circulation state. The downstream passage state is a state in which water flows from the main flow path 1 between the upstream side connection position UPC and the downstream side connection position LOC to the main flow path 1 downstream of the downstream side connection position LOC. The downstream circulation state is a state in which water flows from the circulation flow path 2 downstream of the tank TS to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC.

According to the above configuration, the raw water is supplied to the user as treated water in a state where the water quality is improved at least once by the water treatment unit 3.

(5) The water quality measurement sensor WQS may be connected to the main flow path 1 upstream of the upstream connection position UPC. In this case, the water treatment device 100 receives the water quality information that can identify the water quality of the water measured by the water quality measurement sensor WQS, and receives the pump P, the water treatment unit 3, the upstream side flow path switching valve SWV1, and the downstream side flow. A control unit C for controlling the path switching valve SWV2 may be further provided. The control unit C includes a water quality determination unit (S9 in FIG. 8) for determining whether or not the water quality measured by the water quality measurement sensor WQS is better than a predetermined standard. The control unit C is in a state in which the pump P flows water through the main flow path 1 and the water treatment unit 3 executes control for improving the water quality of the water flowing through the main flow path 1. In this state, the water quality determination unit (S9 in FIG. 8) may determine that the water quality is better than a predetermined standard. In this case, the control unit C puts the upstream side flow path switching SWV1 in the upstream side passing state and puts the downstream side flow path switching valve SWV2 in the downstream side passing state.

According to this, when the water quality is so good that the water does not need to flow through the circulation flow path 2, it is possible to automatically form a state in which the water flows only through the main flow path 1.

(6) An operation course selection unit S for selecting whether the current operation state of the water treatment device 100 is to be the automatic operation state or the manual operation state may be further provided. When the current operation state is selected to be the manual operation state by the operation of the operation course selection unit S by the user, the control unit C sets the upstream side flow path switching valve SWV1 to the upstream side passage state. At the same time, the downstream flow path switching valve SWV2 is set to the downstream passing state. According to this, it is possible to manually form a state in which water flows only in the main flow path 1.

The entire contents of Japanese Patent Application No. 2018-141143 (Filing date: July 27, 2018) are incorporated herein by reference.

According to the present embodiment, in any case, it is possible to provide a water treatment apparatus in which raw water is supplied to a user in a state where the water quality is improved at least once by the water treatment unit.

1 Main flow path 2 Circulation flow path 3 Water treatment unit 100 Water treatment device D Display unit TS tank LOC Downstream side connection position P pump S9 Water quality judgment unit SWV1 Upstream side flow path switching valve SWV2 Downstream side flow path switching valve UPC Upstream side connection Position V1 1st on-off valve V2 2nd on-off valve V3 3rd on-off valve V4 4th on-off valve WQS water quality measurement sensor

Claims (6)

The main flow path that guides water from upstream to downstream,
A circulation flow path that branches from the downstream connection position located on the relatively downstream side of the main flow path and joins the upstream side connection position located on the relatively upstream side of the main flow path.
A tank connected to the circulation flow path and storing the water flowing through the circulation flow path,
A pump that is connected to the main flow path between the upstream side connection position and the downstream side connection position and sends out the water from the upstream to the downstream in the main flow path.
A water treatment unit that is connected to the main flow path between the upstream side connection position and the downstream side connection position and improves the water quality of the water flowing through the main flow path.
Water quality measurement that is connected to the main flow path upstream of the upstream side connection position or is connected to the main flow path between the upstream side connection position and the downstream side connection position to measure the water quality of the water. With the sensor
A first on-off valve that is connected to the main flow path on the upstream side of the upstream connection position and switches between an open state in which the water passes and a closed state in which the water does not pass.
A second on-off valve that is connected to the main flow path on the downstream side of the downstream connection position and switches between an open state in which the water passes and a closed state in which the water does not pass.
A third on-off valve that is connected to the circulation flow path between the tank and the upstream connection position and switches between an open state in which the water passes and a closed state in which the water does not pass.
A fourth on-off valve that is connected to the circulation flow path between the tank and the downstream connection position and switches between an open state in which the water passes and a closed state in which the water does not pass.
A water treatment device equipped with. The water quality measurement sensor is connected to the main flow path upstream of the upstream connection position.
Upon receiving the water quality information that can identify the water quality of the water measured by the water quality measurement sensor, the pump, the water treatment unit, the first on-off valve, the second on-off valve, and the third on-off valve ,
And a control unit for controlling the fourth on-off valve is further provided.
The control unit
A water quality determination unit for determining whether or not the water quality measured by the water quality measurement sensor is better than a predetermined standard is included.
In a state where the pump flows the water through the main flow path and the water treatment unit executes control for improving the water quality of the water flowing through the main flow path.
When the water quality determination unit determines that the water quality is better than a predetermined standard, the first on-off valve and the second on-off valve are opened, and the third on-off valve and the first on-off valve are opened. The water treatment apparatus according to claim 1, which closes the on-off valve of 4. Further provided with an operation course selection unit for selecting whether the current operation state of the water treatment device is the automatic operation state or the manual operation state.
The control unit operates the first on-off valve and the second on-off valve when the current operation state is selected to be the manual operation state by the operation of the operation course selection unit by the user. The water treatment apparatus according to claim 2, wherein the valve is opened and the third on-off valve and the fourth on-off valve are closed. The main flow path that guides water from upstream to downstream,
A circulation flow path that branches from the downstream connection position located on the relatively downstream side of the main flow path and joins the upstream side connection position located on the relatively upstream side of the main flow path.
A tank connected to the circulation flow path and storing the water flowing through the circulation flow path,
A pump that is connected to the main flow path between the upstream side connection position and the downstream side connection position and sends out the water from the upstream to the downstream in the main flow path.
A water treatment unit that is connected to the main flow path between the upstream side connection position and the downstream side connection position and improves the water quality of the water flowing through the main flow path.
Water quality measurement that is connected to the main flow path upstream of the upstream side connection position or is connected to the main flow path between the upstream side connection position and the downstream side connection position to measure the water quality of the water. With the sensor
An upstream passage state provided at the upstream connection position, where the water flows from the main flow path upstream of the upstream connection position to the main flow path between the upstream connection position and the downstream connection position.
An upstream flow path in which the water is switched to any of the upstream circulation states in which the water flows from the circulation flow path downstream of the tank to the main flow path between the upstream connection position and the downstream connection position. Switching valve and
A downstream passage state provided at the downstream connection position, where the water flows from the main flow path between the upstream connection position and the downstream connection position to the main flow path downstream of the downstream connection position.
A downstream flow path in which the water is switched to one of the downstream circulation states in which the water flows from the circulation flow path downstream of the tank to the main flow path between the upstream side connection position and the downstream side connection position. A water treatment device equipped with a switching valve. The water quality measurement sensor is connected to the main flow path upstream of the upstream connection position.
Control to control the pump, the water treatment unit, the upstream side flow path switching valve, and the downstream side flow path switching valve by receiving water quality information that can identify the water quality measured by the water quality measurement sensor. With more parts
The control unit
A water quality determination unit for determining whether or not the water quality measured by the water quality measurement sensor is better than a predetermined standard is included.
In a state where the pump flows the water through the main flow path and the water treatment unit executes control for improving the water quality of the water flowing through the main flow path.
When the water quality determination unit determines that the water quality is better than a predetermined standard, the upstream side flow path switching valve is put into the upstream side passing state, and the downstream side flow path switching valve is moved to the downstream side. The water treatment apparatus according to claim 4, which is in a side-passing state. Further provided with an operation course selection unit for selecting whether the current operation state of the water treatment device is the automatic operation state or the manual operation state.
When the current operation state is selected to be the manual operation state by the operation of the operation course selection unit, the control unit sets the upstream side flow path switching valve to the upstream side passage state. The water treatment apparatus according to claim 5, wherein the downstream flow path switching valve is brought into the downstream passing state.

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