WO2020022311A1 - Water treatment device - Google Patents

Abstract

A water treatment device 100 that comprises a main flow channel 1 and a circulation flow channel 2. The circulation flow channel 2: branches from a downstream-side connection location LOC that is located relatively on the downstream side of the main flow channel 1; and merges at an upstream-side connection location UPC that is located relatively on the upstream side of the main flow channel 1. A water treatment unit 3 is connected to the main flow channel 1 between the upstream-side connection location UPC and the downstream-side connection location LOC and improves the quality of water that flows through the main flow channel 1.

Description

Water treatment equipment

The present disclosure relates to a water treatment device.

水 Conventionally, a water treatment device for treating raw water such as water from a well, a river or a pond, or rainwater has 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, water quality is improved a plurality of times by circulating raw water a plurality of times alternately through a part of a main flow path and a circulation flow path. Thereby, the treated water having a water quality higher than a predetermined standard is sent to the downstream of the main flow path.

JP 2013-86034 A (Patent No. 5982626)

In the water treatment apparatus disclosed in Patent Document 1 described above, when a problem occurs in the circulation channel or the tank connected to the circulation channel, the main channel is not passed through the circulation channel. Only the raw water needs to be flushed. On the other hand, in the water treatment device disclosed in Patent Document 1 described above, a water treatment unit such as a filtration unit and an oxidant supply unit is connected to the circulation channel. Therefore, when the above-described problem occurs, if the raw water flows only through the main flow path without passing through the circulation flow path, the raw water is used by the user in a state where the water quality is not improved by the water treatment unit at least once. Would. However, in any case, it is preferable that the water quality of the raw water is improved at least once by the water treatment unit from the viewpoint of securing a better water quality than a certain standard.

The present disclosure has been made in view of such problems of the related art. In addition, 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 at least by a water treatment unit with its water quality improved.

In order to solve the above problems, a water treatment apparatus according to a first aspect of the present disclosure includes a main flow path that guides water from upstream to downstream, and a downstream side positioned relatively downstream of the main flow path. A circulating flow path that branches from a connection position and joins an upstream connection position positioned relatively upstream of the main flow path; and the water that is connected to the circulating flow path and flows through the circulating flow path. And a pump that is connected to the main flow path between the upstream connection position and the downstream connection position, and that pumps the water from upstream to downstream in the main flow path, the upstream connection position, A water treatment unit connected to the main flow path between the downstream connection position and improving the quality of the water flowing through the main flow path, and connected to the main flow path upstream of the upstream connection position, or , The upstream connection position and the downstream connection A water quality measurement sensor that is connected to the main flow path between the water flow path and a water quality measurement sensor that measures the water quality of the water, and is connected to the main flow path on the upstream side of the upstream connection position to allow the water to pass therethrough. A first on-off valve that switches to a closed state that does not allow the passage of water, and an open state that is connected to the main flow path downstream of the downstream connection position and that allows the water to pass therethrough and a closed state that does not allow the water to pass therethrough A second on-off valve that switches between the tank and the circulation flow path between the tank and the upstream connection position, and is in one of 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 switched, and a third on-off valve that is connected to the circulation flow path between the tank and the downstream connection position and that switches between an open state in which the water passes and a closed state in which the water does not pass. Comprises a closing valve, the.

A water treatment apparatus according to a second aspect of the present disclosure is characterized in that a main flow path that guides water from upstream to downstream, and a branch from a downstream connection position positioned relatively downstream of the main flow path, A circulation channel that merges with an upstream connection position positioned relatively upstream of the road, a tank that is connected to the circulation channel, and stores the water that flows through the circulation channel, A pump that is connected to the main flow path between the side connection position and the downstream connection position and that sends out the water from upstream to downstream in the main flow path, between the upstream connection position and the downstream connection position A water treatment unit connected to the main flow path and improving the quality of the water flowing through the main flow path, connected to the main flow path upstream of the upstream connection position, or the upstream connection position and In the main flow path between the downstream connection position And a water quality measurement sensor for measuring the water quality of the water, provided at the upstream connection position, wherein the water flows from the main flow path upstream of the upstream connection position to the upstream connection position and the downstream connection position. And 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. An upstream flow path switching valve that is switched to any of an upstream circulation state, and the water is provided at the downstream connection position, and the water flows from the main flow path between the upstream connection position and the downstream connection position. A downstream passage state that flows to the main flow path downstream of the downstream connection position, and the main flow between the upstream connection position and the downstream connection position where the water flows from the circulation flow path downstream of the tank. Downstream circulation to the road Includes a downstream-passage switching valve is switched to either the state, the.

FIG. 1 is a diagram for explaining the overall configuration of a water treatment system in which the water treatment device according to the first embodiment is incorporated. FIG. 2 is a functional block diagram related to control of the water treatment device according to the first embodiment. FIG. 3 is a flowchart for explaining a process executed by the control unit of the water treatment device according to the first embodiment. FIG. 4 is a diagram for explaining the overall configuration of a water treatment system in which the water treatment device according to the second embodiment is incorporated. FIG. 5 is a flowchart for explaining a process executed by the control unit of the water treatment device according to the second embodiment. FIG. 6 is a diagram for explaining the overall configuration of a water treatment system in which the water treatment device according to the third embodiment is incorporated. FIG. 7 is a functional block diagram related to control of the water treatment device according to the third embodiment. FIG. 8 is a flowchart illustrating a process performed by the control unit of the water treatment device according to the third embodiment. FIG. 9 is a diagram for explaining an overall configuration of a water treatment system in which the water treatment device according to the fourth embodiment is incorporated. FIG. 10 is a flowchart for explaining a 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 embodiments, portions denoted by the same reference numerals have the same function as each other unless otherwise specified, even if there is a slight difference in shape in the drawings. I do.

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

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

As shown in FIG. 1, a water treatment apparatus 100 is connected to the water treatment system 1000 of the present embodiment. The water treatment apparatus 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 apparatus 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 apparatus 100 includes a main flow path 1 that guides water from a water source W such as well water existing underground or a water pipe buried underground to a house H from upstream to downstream, specifically, underwater. . In the main flow path 1, the raw water flows to the water treatment unit 3, and after the water quality is improved by the water treatment unit 3, the treated water flows downstream.

水 The water quality measurement sensor WQS, the first on-off valve V1, the pump P, the water treatment unit 3, and the 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 according to the present embodiment includes a control unit C that controls the operation 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 larger capacity than the tank TS connected to the circulation channel 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 a user. The user in the house H uses the treated water discharged from the outlet U after flowing to the outlet U via the main flow path 1.

循環 A circulation channel 2 is connected to the main channel 1. Both ends of the circulation flow path 2 are connected to 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 side connection position LOC of the road 1.

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

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

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

The water treatment section 3 is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, more specifically, to the main flow path 1 between the pump P and the downstream connection position LOC. The quality of the water flowing through the road 1 is improved, that is, the raw water is changed to 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, when passing through the filtration unit F, foreign substances contained in the raw water are removed. Filtration unit F is a sand filtration unit containing manganese sand in the present embodiment. 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 raw water flowing through the main flow path 1. Further, the water treatment unit 3 may include a water softening device that softens hard water by removing calcium ions and magnesium ions from 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 quality has been improved once or more times by the water treatment unit 3. The secondary tank TL is 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 plural times by the water treatment unit 3. We store 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 level of 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 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 where water passes and a closed state where water does not pass.

The third on-off valve V3 is connected to the circulation channel 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 channel 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 with the water quality 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. Accordingly, the control unit C receives information that can specify 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, the ratio may be a ratio of the foreign matter to be filtered by the filtration unit F to 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 described later) that determines whether the water quality measured by the water quality measurement sensor WQS has been improved from a predetermined reference. 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 the 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 has been improved beyond a predetermined reference in this state, the control unit C performs 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 apparatus 100 of the present embodiment, for example, the tank TS or the circulation channel 2 may fail and the raw water may not flow through the circulation channel 2 in some cases. Also 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. Specifically, in both the manual operation and the automatic operation described below, the raw water is supplied to the user as treated water in a state where the water quality has been 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 apparatus 100 may not be stopped in some cases. 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. Thereby, also in this case, the raw water is supplied to the user as treated water in a state where the water quality has been improved at least once by the water treatment unit 3.

水 The water treatment apparatus 100 of the present embodiment includes a display unit D controlled by the control unit C and displaying predetermined information. The display unit D displays, for example, whether the current operation state of the water treatment apparatus 100 is the automatic operation state or the manual operation state. When the display unit D indicates that the current operation state of the water treatment apparatus 100 is the manual operation state, the control unit C opens the first on-off valve V1 and the second on-off valve V2, Further, 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 and selecting the driving course selecting unit S.

Accordingly, the user manually operates the operation course selection unit S when the circulation channel 2 or the tank TS is damaged due to, for example, an earthquake. Thereby, the state of the water treatment apparatus 100 can be set 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 and touches the third on-off valve V3 by touching the manual operation icon (or one-pass icon) of the operation course selection unit S. The fourth on-off valve V4 can be closed. As a result, 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 and reaches the secondary tank TL. Thus, even when the tank TS or the circulation channel 2 is out of order, the user can use the treated water whose water quality has been improved at least once in the water treatment unit 3.

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

制 御 As shown in FIG. 2, the control unit C receives each command signal transmitted from each of the driving 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 whether the operation state of the water treatment apparatus 100 is set to 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 information on the measured water level to the control unit C. Specifically, the water level sensor WHS1 notifies when the water level in the tank TS is equal to or higher than the upper limit water level WH and when the water level in the tank TS is equal to or lower than the lower limit water level WL. The information is transmitted to the control unit C.

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

The water quality measurement sensor WQS measures the quality of water flowing through the main flow path 1 upstream of the upstream connection position UPC, and transmits information on the measured water quality 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 may be connected to the main flow path 1 between the first on-off valve V1 and the upstream connection position UPC. Good.

(4) The power switch SW transmits a command signal for instructing the control unit C to be driven to the control unit C when operated by the user. As a result, the control unit C is activated and receives various information from the driving course selection unit S, the water level sensor WHS1, the water level sensor WHS2, and the water quality measurement sensor WQS.

Based on the received information, the control unit C controls the ozone generation / mixing unit O ₃ as an oxidant supply unit, the pump P, the first on-off valve V1, the second on-off valve V2, and the third on-off valve. Each control signal is transmitted to each of V3, fourth on-off valve V4, and 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 oxidizing agent. The pump P is controlled based on a control signal transmitted from the control unit C so that water flows from upstream to downstream in the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC. Is driven.

The first opening / closing valve V1, the second opening / closing valve V2, the third opening / closing valve V3, and the fourth opening / closing valve V4 are controlled based on control signals transmitted from the control unit C, respectively. The state is switched between an open state in which water passes and a closed state in which water does not pass. The display unit D is controlled based on the control signal transmitted from the control unit C, and displays whether the current operation state is the automatic operation state or the manual operation state.

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

In step S1, the control unit C determines whether 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 Are set, and the processing of steps S1 and S3 is 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.

理由 The reason why such processing is performed 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. Thus, replenishment of the treated water from the tank TS to the secondary tank TL is not performed.

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 controller C determines in step S2 that the water level in the secondary tank TL has reached the lower limit water level WLH. It is determined whether or not: If it is determined in step S2 that the water level in the secondary tank TL is not 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 than the lower limit water level WL remains in the secondary tank TL, the control unit C The water treatment device 100 is not driven. The reason why such a process is performed is that the amount of water in the secondary tank TL is equal to or more than the amount necessary for the user. Therefore, also in this case, the control unit C stops the pump P. Thereby, replenishment of the treated water from the tank TS to the secondary tank TL is not performed.

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. Thereby, 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 the automatic operation as the current operation state of the water treatment apparatus 100 by operating the operation course selection unit S. In step S <b> 5, as the current operation status of the water treatment apparatus 100, it may be determined that the one-pass (manual) operation by the user is selected by the operation of the operation course selection unit S instead of the automatic operation. In this case, in step S6, the control unit C causes the display unit D to display information that can specify that the current operation status is the one-pass (manual) operation.

One-pass (manual) operation is an operation in which water flows only in the main flow path 1 without flowing water in the circulation flow path 2. Thereby, the display unit D displays that the current operation state of the water treatment apparatus 100 is in the one-pass state. Thereby, the user can change the current state of the water treatment apparatus 100 to the secondary tank through the main flow path 1 without passing through the treated water whose water quality has been improved by the water treatment unit 3 without passing through the circulation flow path 2. It is possible to understand that it is possible to set the state to be transmitted to the TL.

That is, the water treatment apparatus 100 includes an operation course selection unit S for selecting whether the current operation state of the water treatment apparatus 100 is set to the automatic operation state or the manual operation state. The control unit C may determine that the user has operated the driving course selecting unit S to change the current driving state to the manual driving state.

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, and opens each of the third on-off valve V3 and the fourth on-off valve V4. close. Thereby, the treated water whose water quality has been improved in the water treatment unit 3 is actually sent to the secondary tank TL only through the main flow path 1 without passing through the circulation flow path 2. Then, the process of step S1 is performed.

On the other hand, in step S5, it may be determined that the automatic driving is selected by the driving course selecting unit S as the current driving state of the water treatment apparatus 100. In this case, in step S9, based on the information on the quality 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, the control unit C determines that the water quality is a predetermined reference value. It is determined whether it is better.

制 御 If it is determined in step S9 that the water quality is better than the predetermined reference, the control unit C executes the processing of step S7. Thereby, the water of the water source W or the treated water whose water quality is improved in the tank TS is transferred to the secondary tank TL via the upstream connection position UPC, the water treatment unit 3 and the downstream connection position LOC. Sent. On the other hand, when 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 a time period in which the water circulates, that is, water alternately flows through the circulation flow path 2 and a part of the main flow path 1. During the circulation time, the water is repeatedly improved in water quality by the water treatment unit 3. A shorter circulation time is set as the water quality measured by the water quality measurement sensor WQS is better, and a longer circulation time is set as the water quality measured by the water quality measurement sensor WQS is worse.

Then, in step S11, the control unit C closes each of the second on-off valve V2 and the third on-off valve V3 while opening each of the first on-off valve V1 and the fourth on-off valve V4. At this time, the pump P is operating. 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 the fourth on-off valve V4, and is guided to the tank TS. 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 the 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 level of the treated water stored in the tank TS is not 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 level of the treated water in the tank TS gradually rises.

に お い て In step S12, the level of the treated water stored in the tank TS may be determined to be 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. Thereby, the water stored in the tank TS moves from the circulation channel 2 to the main channel 1 between the upstream connection position UPC and the downstream connection position LOC. Thereafter, the water moves from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the circulation flow path 2. That is, a so-called circulation cycle is repeated. Thereafter, the control unit C determines in step S14 whether the circulation time determined in step S10 has elapsed.

In step S14, if it is determined that the circulation time has not elapsed, the control unit C determines that the treated water stored in the tank TS has not yet reached a water quality better than a predetermined standard. Then, the state set in step S13 is maintained. At this time, the pump P is operating. Therefore, water flows alternately between the circulation channel 2 and the main channel 1. Thereby, 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 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 regards the treated water stored in the tank TS as already having a water quality better than a predetermined standard. . Accordingly, in step S15, the control unit C closes 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. At this time, the pump P is in a driving state. Therefore, the treated water stored in the tank TS passes through the third on-off valve V3, the upstream connection position UPC, the water treatment unit 3, the downstream connection position LOC, and the second on-off valve V2. And is sent to the secondary tank TL.

Thereafter, in step S16, the control unit C determines whether the 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 be driven. Therefore, the treated water in the tank TS passes through the third opening / closing valve V3, the upstream connection position UPC, the water treatment section 3, the downstream connection position LOC, and the second opening / closing valve V2, and then flows into the secondary tank. It continues to be sent to TL. On the other hand, if it is determined in step S16 that the water level of the processed water in the tank TS is equal to or lower than the lower limit water level WL, the control unit C executes the processing of step S1 again.

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

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

The water treatment apparatus 100 of the present embodiment shown in FIG. 4 differs from the water treatment apparatus 100 of the first embodiment shown in FIG. 1 only in the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. I have. In other words, the water treatment apparatus 100 of the present embodiment shown in FIG. 4 and the water treatment apparatus 100 of the first embodiment shown in FIG. 1 are different from the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. Have the same configuration.

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

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

Next, each process in the control 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 according to the present embodiment in FIG. 5 and the processing executed by the control unit C according to the first embodiment in FIG. 3 include steps S9A, S10A, S11A, S12A, S13A, and S13A. Only the processing of step S14A is different. In other words, the process executed by the control unit C in the embodiment of FIG. 5 and the process executed by the control unit C in FIG. 3 are the same as those in steps S9A, S10A, S11A, S12A, S13A, and S14A. Perform the same processing.

Specifically, in the processing executed by control unit C of the present embodiment shown in FIG. 5, in step S9A, control unit C is stored in tank TS measured by 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 level of the treated water stored in the tank TS is not 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, and opens each of the second on-off valve V2 and the third on-off valve V3. close.

と き At this time, the pump P is operating. Therefore, the water is transferred to the tank via 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. Flow into TS. After that, the control unit C repeats the processing of steps S9A and S10A until it is determined that the level of the treated water stored in the tank TS is equal to or higher than the upper limit water level WH.

に お い て In step S9A, it may be determined that the 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, the control unit C determines whether or not the water quality is better than a predetermined reference based on the water quality information transmitted from the water quality measurement sensor WQS in step S11A.

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 fourth on-off valve V4 is opened. Thereby, the treated water circulates alternately through a part of the main flow path 1 and the circulation flow path 2. Specifically, after the treated water flows from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the circulation flow path 2, the treated water flows from the circulation flow path 2 to the upstream connection position. The operation of flowing to the main flow path 1 between the UPC and the downstream connection position LOC is repeated. Thereby, the water quality is repeatedly improved by the water treatment unit 3. Then, the process of step S1 is performed.

On the other hand, in step S11A, it may be determined that the quality of the treated water is better 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, and closes each of the second on-off valve V2 and the third on-off valve V3. open. At this time, the pump P is operating. Therefore, the treated water stored in the tank TS is supplied to the third opening / closing valve V3, the upstream connection position UPC, the water quality measurement sensor WQS, the water treatment unit 3, the downstream connection position LOC, and the second opening / closing valve. It is sent out to the secondary tank TL via the valve V2.

Thereafter, 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 processing in step S1.

According to the water treatment apparatus 100 of the present embodiment, the quality of the treated water flowing through the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC measured by the water quality measurement sensor WQS is a predetermined value. May be better than 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 reliably perform the secondary tank TL having a better water quality than the predetermined standard as compared with the water treatment apparatus 100 according to the first embodiment. The treated water inside can be used.

According to the water treatment apparatus 100 of the present embodiment, even when the tank TS breaks down and the raw water cannot flow through the circulation channel 2, the water quality of the raw water is improved at least once by the water treatment unit 3. The water is supplied to the user as treated water. In addition, according to the water treatment apparatus 100 of the present embodiment, in both the manual operation and the automatic operation, the raw water is treated as water that has been treated at least once by the water treatment unit 3 with the water quality improved. Supplied to the user.

(Embodiment 3)
Third Embodiment A water treatment apparatus 100 and a water treatment system 1000 according to a third embodiment will be described with reference to FIGS.

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

The water treatment apparatus 100 of the present embodiment includes a main flow path 1, an upstream connection position UPC, a downstream 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. Have. These configurations are the same as the corresponding configurations of the first embodiment. However, the water treatment apparatus 100 of the present embodiment includes the upstream-side passage switching valve SWV1 and the downstream-side passage switching valve SWV2.

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

The upstream flow path switching valve SWV1 is provided at an upstream connection position UPC that is a connection position between the main flow path 1 and the circulation flow path 2 on the relatively upstream side. The upstream flow path switching valve SWV1 is switched between an upstream passage state and an upstream circulation state. The upstream passage state is a state in which water flows from the main flow path 1 upstream of the upstream connection position UPC to the main flow path 1 between the upstream connection position UPC and the downstream 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.

(4) The downstream flow path switching valve SWV2 is provided at a downstream connection position LOC that is a relatively downstream connection position between the main flow path 1 and the circulation flow path 2. The downstream flow path switching valve SWV2 is switched to one of a downstream passage state and a downstream circulation state. The downstream passage state is a state in which water flows from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the main flow path 1 downstream of the downstream connection position LOC. The downstream circulation state is a state in which water flows from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the circulation flow path 2 upstream of the tank TS.

According to the water treatment apparatus 100 of the present embodiment, 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.

Also, in the present embodiment, similarly to the first embodiment, the water quality measurement sensor WQS is connected to the main flow path 1 upstream of the upstream connection position UPC. Therefore, the control unit C receives information that can specify 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 passage switching valve SWV1, and the downstream-side passage switching valve SWV2.

制 御 The control unit C further includes a water quality determination unit (S9 in FIG. 8) that determines whether 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 where the pump P causes the water to flow through the main flow path 1 and the water treatment unit 3 executes control for improving the 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 sets the upstream passage switching valve SWV1 to the upstream passage state and sets the downstream passage switching valve SWV2 to the downstream passage state.

に よ り Thereby, the water is sent to the secondary tank TL via the water quality measurement sensor WQS, the upstream flow path switching valve SWV1, the water treatment unit 3, and the downstream flow path switching valve SWV2. That is, the water flows only through the main flow path 1 without flowing into the circulation flow path 2 and is sent to the secondary tank TL.

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

も Also in the present embodiment, the water treatment apparatus 100 includes the display unit D that indicates whether the current state is the state of the automatic operation or the state of the manual operation. When the display unit D indicates that the operation is in the manual operation mode, the upstream passage switching valve SWV1 is manually set to the upstream passage state, and the downstream passage switching valve SWV2 is manually passed to the downstream passage switch. State. Specifically, the user operates the operation course selection unit S to set the upstream flow path switching valve SWV1 to the upstream passage state and set the downstream flow path switching valve SWV2 to the downstream passage state. Can be.

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

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

In the present embodiment, instead of controlling the first to fourth on-off valves V1, V2, V3, and V4, the control unit C controls the upstream-side flow path switching valve SWV1 and the downstream-side flow path switching valve SWV2, respectively. Control.

Next, each process in the control 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 of the control unit C of the present embodiment shown in FIG. 8 is different from 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 opening / closing valves V1, V2, V3, and V4 of the first embodiment are replaced with the operations of the upstream flow path switching valve SWV1 and the downstream flow path switching valve SWV2. I have. Other processes are the same as those of the control unit C of the present embodiment shown in FIG. 8 and those of the control unit C of the first embodiment shown in FIG.

Specifically, in step S7C, the control unit C sets the upstream passage switching valve SWV1 to the upstream passage state and sets the downstream passage switching valve SWV2 to the downstream passage state. As a result, the water is sent to the secondary tank TL via the water quality measurement sensor WQS, the upstream flow path switching valve SWV1, the water treatment unit 3, and the downstream flow path switching valve SWV2. That is, the water flows only through the main flow path 1 without flowing into the circulation flow path 2 and is sent to the secondary tank TL.

In step S11C, the control unit C sets the upstream passage switching valve SWV1 to the upstream passage state and sets the downstream passage switching valve SWV2 to the downstream circulation state. Thereby, water is sent to the tank TS via the water quality measurement sensor WQS, the upstream flow path switching valve SWV1, the water treatment unit 3, and the downstream flow path switching valve SWV2. That is, 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 sets the upstream flow path switching valve SWV1 to the upstream circulation state, and also sets the downstream flow path switching valve SWV2 to the circulation state. Thus, the cycle in which water reaches the tank TS again from the tank TS via the upstream flow path switching valve SWV1, the water treatment unit 3, and the downstream flow path switching valve SWV2 is repeated. That is, a cycle in which water flows from the circulation channel 2 to the main channel 1 and then flows from the main channel 1 to the circulation channel 2 is repeated.

In step S15C, the control unit C sets the upstream flow path switching valve SWV1 to the upstream circulation state and sets the downstream flow path switching valve SWV2 to the downstream passage state. Thereby, water is sent from the tank TS to the secondary tank TL via the upstream flow path switching valve SWV1, the water treatment unit 3, and the downstream flow path switching valve SWV2. That is, the water flows from the circulation channel 2 to the main channel 1 and is then sent to the secondary tank TL.

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

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

(Embodiment 4)
Fourth Embodiment A water treatment apparatus 100 and a water treatment system 1000 according to a 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 according to the present embodiment will be described with reference to FIG.

The water treatment apparatus 100 of the present embodiment shown in FIG. 9 differs from the water treatment apparatus 100 of the third embodiment shown in FIG. 6 only in the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. I have. In other words, the water treatment apparatus 100 of the present embodiment shown in FIG. 9 and the water treatment apparatus 100 of the third embodiment shown in FIG. 6 are different from the position of the main flow path 1 to which the water quality measurement sensor WQS is connected. Have the same configuration.

水 The water quality measurement sensor WQS of the water treatment apparatus 100 of the present embodiment is connected to the main flow path 1 between the upstream connection position UPC and the downstream 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.

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

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

Specifically, in the process executed by control unit C of the present embodiment shown in FIG. 10, in step S9B, control unit C is stored in tank TS measured by 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 level of the treated water stored in the tank TS is not higher than the upper limit water level WH. In this case, in step S10B, the control unit C sets the upstream flow path switching valve SWV1 to the upstream passage state while setting the downstream flow path switching valve SWV2 to the downstream circulation state.

と き At this time, the pump P is being driven. Therefore, the water is sent to the tank TS via the upstream flow path switching valve SWV1, the water quality measurement sensor WQS, the water treatment unit 3, and the downstream flow path switching valve SWV2. That is, the water flows into the circulation channel 2 and is sent not to the secondary tank TL but to the tank TS. After that, the control unit C repeats the processes of step S9B and step S10B until it is determined that the 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, the level of the treated water stored in the tank TS may be determined to be 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 passage switching valve SWV1 is set to the upstream circulation state, and the downstream passage switching valve SWV2 is set to the downstream circulation. State. At this time, the pump P is being driven. Therefore, the so-called circulation cycle is repeated by the treated water alternately passing through a part of the main flow path 1 and the circulation flow path 2. Thereby, the water quality is repeatedly improved by the water treatment unit 3.

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

On the other hand, when it is determined in step S11B that the treated water is better than the predetermined reference, in step S13B, the control unit C sets the upstream flow path switching valve SWV1 to the circulation state and The passage switching valve SWV2 is set to the passing state. 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 flow path switching valve SWV1, the water treatment unit 3, and the downstream flow path switching valve SWV2.

Thereafter, 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 processing in 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 through the circulation flow path 2, the raw water is not removed by the water treatment unit 3 at least once. The water is supplied to the user as treated water with improved water quality. In addition, according to the water treatment apparatus 100 of the present embodiment, in both the manual operation and the automatic operation, the raw water is treated as water that has been treated at least once by the water treatment unit 3 with the water quality improved. Supplied to the user.

According to the water treatment apparatus 100 of the present embodiment, the quality of the treated water flowing through the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC measured by the water quality measurement sensor WQS is a predetermined value. May be better than 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 better than the predetermined standard.

(Embodiment 5)
Although the water treatment apparatuses 100 according to Embodiments 1 to 4 are provided with the control unit C, the control unit C may not be provided.

In this embodiment, the first to fourth on-off valves V1, V2, V3, and V4 of the first and second embodiments have a structure that can be opened and closed by a user's manual operation. Therefore, if the user causes the first to fourth on-off valves V1, V2, V3, and V4 to open and close instead of the control unit C, the water treatment apparatus according to the first and second embodiments can be used. 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 third and fourth embodiments can be configured such that the flow path can be switched by a manual operation of the user. have. Therefore, if the user causes the upstream flow path switching valve SWV1 and the downstream flow path switching valve SWV2 to perform the flow path switching operation in place of the control unit C, the water in the third and fourth embodiments can be reduced. A water flow similar to that of the treatment apparatus 100 can be formed.

Hereinafter, the characteristic configuration of the water treatment apparatus 100 according to the embodiment and the effects obtained thereby will be described.

{(1)} The water treatment apparatus 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 apparatus 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 a downstream connection position LOC positioned relatively downstream of the main flow path 1 and merges with an upstream connection position UPC positioned relatively upstream of the main flow path 1. The tank TS is connected to the circulation channel 2 and stores water flowing through the circulation channel 2.

The pump P is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, and sends out water in the main flow path 1 from upstream to downstream. The water treatment unit 3 is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, and improves the quality of 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 Is measured.

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 with the water quality 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 apparatus 100 receives the water quality information that can specify the water quality 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, A control unit C for controlling the third on-off valve V3 and the fourth on-off valve V4 is provided. The control unit C includes a water quality determination unit (S9 in FIG. 3) that determines whether 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 where the pump P causes the water to flow through the main flow path 1 and the water treatment unit 3 executes control for improving the quality of the water flowing through the main flow path 1. In this state, the control unit C sets the first on-off valve V1 and the second on-off valve V2 when the water quality determination unit (S9 in FIG. 3) determines that the water quality is better than a predetermined standard. Open and close 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 channel 2, it is possible to automatically form a state in which the water flows only through the main channel 1.

{(3)} The water treatment apparatus 100 may further include an operation course selection unit S for selecting whether the current operation state is the automatic operation state or the manual operation state. The control unit C sets the first on-off valve V1 and the second on-off valve V2 when the user operates the driving course selection unit S to change the current operation state to the manual operation state. Open and close the third on-off valve V3 and the fourth on-off valve V4. According to this, the state in which water flows only through the main flow path 1 can be manually formed.

{(4)} The water treatment apparatus 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 apparatus 100 includes an upstream-side passage switching valve SWV1 and a downstream-side passage switching valve SWV2.

The main flow path 1 guides water from upstream to downstream. The circulation flow path 2 branches from a downstream connection position LOC positioned relatively downstream of the main flow path 1 and joins an upstream connection position UPC positioned relatively upstream of the main flow path 1. . The tank TS is connected to the circulation channel 2 and stores water flowing through the circulation channel 2. The pump P is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, and sends out water in the main flow path 1 from upstream to downstream. The water treatment unit 3 is connected to the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC, and improves the quality of 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 Is measured.

The upstream-side switching valve SWV1 is provided at the upstream connection position UPC. The upstream flow path switching valve SWV1 is switched between an upstream passage state and an upstream circulation state. The upstream passage state is a state in which water flows from the main flow path 1 upstream of the upstream connection position UPC to the main flow path 1 between the upstream connection position UPC and the downstream 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-side flow switching valve SWV2 is provided at the downstream connection position LOC. The downstream flow path switching valve SWV2 is switched to one of a downstream passage state and a downstream circulation state. The downstream passage state is a state in which water flows from the main flow path 1 between the upstream connection position UPC and the downstream connection position LOC to the main flow path 1 downstream of the downstream 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 has been 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 apparatus 100 receives the water quality information that can specify the quality of the water measured by the water quality measurement sensor WQS, and receives the pump P, the water treatment unit 3, the upstream flow path switching valve SWV1, and the downstream flow A control unit C for controlling the road switching valve SWV2 may be further provided. The control unit C includes a water quality determination unit (S9 in FIG. 8) that determines whether 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 where the pump P causes the water to flow through the main flow path 1 and the water treatment unit 3 executes control for improving the 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 controller C sets the upstream flow path switching SWV1 to the upstream passage state and sets the downstream flow path switching valve SWV2 to the downstream passage state.

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

{(6)} The water treatment apparatus 100 may further include an operation course selection unit S for selecting whether to set the current operation state to the automatic operation state or the manual operation state. The control unit C sets the upstream flow path switching valve SWV1 to the upstream passage state when the current operation state is selected to be the manual operation state by the operation of the driving course selection unit S by the user, In addition, the downstream passage switching valve SWV2 is set to the downstream passage state. According to this, the state in which water flows only through the main flow path 1 can be manually formed.

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

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 at least once by the water treatment section with the water quality improved.

Reference Signs List 1 Main flow path 2 Circulation flow path 3 Water treatment unit 100 Water treatment device D Display unit TS tank LOC Downstream connection position P Pump S9 Water quality judgment unit SWV1 Upstream flow path switching valve SWV2 Downstream flow path switching valve UPC Upstream connection Position V1 First on-off valve V2 Second on-off valve V3 Third on-off valve V4 Fourth on-off valve WQS Water quality measurement sensor

Claims (6)

1. A main channel for guiding water from upstream to downstream;
   A circulation flow path that branches off from a downstream connection position positioned relatively downstream of the main flow path and merges with an upstream connection position positioned relatively upstream of the main flow path;
   A tank that is connected to the circulation channel and stores the water flowing through the circulation channel,
   A pump that is connected to the main flow path between the upstream connection position and the downstream connection position, and that pumps the water from upstream to downstream in the main flow path;
   A water treatment unit that is connected to the main flow path between the upstream connection position and the downstream connection position and improves the 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 connection position, or connected to the main flow path between the upstream connection position and the downstream connection position, and measures the water quality of the water Sensors and
   A first on-off valve that is connected to the main flow path on the upstream side of the upstream connection position and that switches between an open state in which the water passes and a closed state in which the water does not pass;
   A second opening / closing valve that is connected to the main flow path on the downstream side of the downstream connection position and that switches between an open state in which the water passes and a closed state in which the water does not pass;
   A third opening / closing valve that is connected to the circulation channel between the tank and the upstream connection position and that 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 channel between the tank and the downstream connection position and that 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.
2. The water quality measurement sensor is connected to the main flow path upstream of the upstream connection position,
   The pump, the water treatment unit, the first opening / closing valve, the second opening / closing valve, and the third opening / closing valve, upon receiving water quality information capable of specifying the quality of the water measured by the water quality measuring sensor. ,
   And a control unit for controlling the fourth on-off valve,
   The control unit includes:
   Including a water quality determination unit that determines whether the water quality measured by the water quality measurement sensor is better than a predetermined reference,
   In a state where the pump causes the water to flow through the main flow path, and the water treatment unit is executing control for improving the quality of the water flowing through the main flow path,
   When the water quality determining unit determines that the water quality is better than a predetermined standard, the first open / close valve and the second open / close valve are opened, and the third open / close valve and the second open / close valve are opened. The water treatment apparatus according to claim 1, wherein the on-off valve of (4) is closed.
3. Whether the current operation state of the water treatment device is an automatic operation state or a manual operation state is further provided with an operation course selection unit for selecting whether to be a manual operation state,
   The control unit is configured to, when a current operation state is selected to be the manual operation state by an operation of the driving course selection unit by a user, perform the first opening / closing valve and the second opening / closing operation. 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.
4. A main channel for guiding water from upstream to downstream;
   A circulation flow path that branches off from a downstream connection position positioned relatively downstream of the main flow path and merges with an upstream connection position positioned relatively upstream of the main flow path;
   A tank that is connected to the circulation channel and stores the water flowing through the circulation channel,
   A pump that is connected to the main flow path between the upstream connection position and the downstream connection position, and that pumps the water from upstream to downstream in the main flow path;
   A water treatment unit that is connected to the main flow path between the upstream connection position and the downstream connection position and improves the 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 connection position, or connected to the main flow path between the upstream connection position and the downstream connection position, and measures the water quality of the water Sensors and
   An upstream passage state provided at the upstream connection position, wherein 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,
   And an upstream channel in which the water is switched to any of an upstream circulation state in which the water flows from the circulation channel downstream of the tank to the main channel between the upstream connection position and the downstream connection position. A switching valve,
   A downstream passage state provided at the downstream connection position, wherein 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,
   And a downstream channel in which the water is switched to a downstream circulation state in which the water flows from the circulation channel downstream of the tank to the main channel between the upstream connection position and the downstream connection position. A water treatment device comprising: a switching valve.
5. The water quality measurement sensor is connected to the main flow path upstream of the upstream connection position,
   Control for receiving the water quality information capable of specifying the water quality of the water measured by the water quality measurement sensor, and controlling the pump, the water treatment unit, the upstream passage switching valve, and the downstream passage switching valve. Part further,
   The control unit includes:
   Including a water quality determination unit that determines whether the water quality measured by the water quality measurement sensor is better than a predetermined reference,
   In a state where the pump causes the water to flow through the main flow path, and the water treatment unit is executing control for improving the quality of the water flowing through the main flow path,
   When the water quality is determined by the water quality determination unit to be better than a predetermined reference, the upstream flow path switching valve is set to the upstream passage state, and the downstream flow path switching valve is set to the downstream side. The water treatment device according to claim 4, wherein the water treatment device is set to a side passage state.
6. Whether the current operation state of the water treatment device is an automatic operation state or a manual operation state is further provided with an operation course selection unit for selecting whether to be a manual operation state,
   The control unit sets the upstream flow path switching valve to the upstream passage state when the current operation state is selected to be the manual operation state by the operation of the operation course selection unit. The water treatment apparatus according to claim 5, wherein the downstream flow path switching valve is set to the downstream passage state.

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