JPH09294978A - Method and apparatus for water treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a treatment container in a short time by providing a cleaning process in which a water supply pump is driven in a water treatment apparatus having a water passing process in which raw water is treated by passing through a treatment container in which a treatment material is placed and a regeneration process in which regenerating liquid is passed through the treatment container to regenerate the treatment material. SOLUTION: In a water passage process, raw water in a raw water tank 5 flows into a resin cylinder 1 through a raw water line 8 and is passed as an ascending flow by a water supply pump 9. Next, in a regeneration process, saturated salt water in a salt water tank 6 is made to flow down through a salt water flow-down line 16, and raw water in the tank 5 is made to flow down through a raw water flow-down line 17 to be mixed in a soft water outlet part 12. In this way, salt water of a prescribed concentration is obtained to regenerate an ion exchange resin 4, and the salt water after the regeneration is discharged through a drain line 18. Next, an extrusion process is carried out, raw water in a tank 5 flows into the resin cylinder 1 through the line 17, and salt components left in the ion exchange resin 4 is extruded and washed with water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-passing step in which raw water is passed through a treatment container containing a treatment material for treatment, a regeneration step in which a regenerant is passed through the treatment vessel to regenerate the treatment material, The present invention relates to a water treatment device and a water treatment method, such as a water softening device, which performs an extrusion step of pushing out a residual regeneration liquid during a regeneration step.

[0002]

As a water softening device discharging device of this type, there is known a device for storing raw water in a tank and performing a pushing process by dropping the raw water by gravity.
Further, an ion exchange resin is generally used as a treatment material for softening water. In such a device, if water is not passed into the processing container for a long time, harmless organic substances will flow out from the resin, which will be mixed as a little odor or colored water, and the water softening device for household use When used for, it may cause complaints. Further, it may not be hygienic to supply raw water stored in a raw water tank for a long time like a domestic soft water curing device.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and includes a raw water tank, a raw water line, a treatment container containing a treatment material, and a treated water line in this order. A water flow passage through which a water supply pump is inserted in the treated water line, a regeneration flow passage including a regenerant tank, a regenerant line, a treatment container, and a drain line in sequence, a raw water tank,
An extrusion flow path that sequentially includes a raw water downflow line, a processing container, and a drain line, and a cleaning flow path that includes a raw water tank, a raw water line, a processing container, and a drain line in order and a water supply pump is inserted into the raw water line, and the water supply pump is driven. To pass the raw water through the water flow passage, a regeneration process in which the regenerated liquid is passed through the regeneration flow passage, an extrusion process in which the raw water is passed through the extrusion flow passage by natural fall, and the water supply pump is driven to wash A first feature of the present invention is a water treatment device provided with a switching means for switching a cleaning step of circulating raw water through a flow path.

Further, according to the present invention, a raw water in a raw water tank is sequentially passed through a treatment container containing a treatment material and a treatment water line by driving a water supply pump, and a regenerant in a regenerant tank is treated as a treatment container and a drain. Regeneration process that sequentially circulates through the line, extrusion process that causes raw water from the raw water tank to sequentially flow through the treatment container and drain line by natural fall, and washing that causes raw water from the raw water tank to sequentially flow through the treatment container and drain line by driving the water supply pump Second water treatment method including a step
The feature of.

According to the above first and second characteristics, by performing the cleaning process, the flow rate of the raw water supplied to the processing container by the drive of the water supply pump per unit time is due to the extrusion by natural fall. Compared with this, the inside of the processing container is cleaned in a short time, and the raw water in the raw water tank is quickly discharged.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of a water treatment apparatus corresponding to claim 1 of the present invention, a raw water tank, a raw water line, a treatment container accommodating a treatment material, and a treated water line are sequentially included, and a raw water line or treatment Water passage with water supply pump inserted in water line, regenerant tank, regenerant line, processing container,
A regeneration flow path including a drain line in sequence, an extrusion flow path including a raw water tank, a raw water downflow line, a treatment vessel, and a drain line in sequence, and a raw water tank, a raw water line, a treatment vessel, and a drain line in sequence, and a water supply pump for the raw water line. By inserting the washing flow path, a water flow step of driving the water supply pump to flow the raw water through the water flow path, a regeneration step of flowing the regenerant liquid through the regeneration flow path, and a natural drop of the raw water through the extrusion flow path. A water treatment apparatus is provided, which includes a pushing step for circulating and a switching means for driving the water supply pump to switch a washing step for circulating raw water through a washing channel.

This embodiment will be described in detail below. In this embodiment, a raw water line is a line through which raw water flows, a reclaimed liquid line is a line through which reclaimed liquid flows, and a treated water line is a line through which treated raw water treated with a treatment material flows. Means a line for discharging the liquid to be drained in the processing container. The water flow passage includes a raw water tank, a treatment container, and a treated water line in that order. The raw water tank is a means for temporarily storing raw water, and the treatment container is a means for accommodating a treatment material such as an ion exchange resin therein. The raw water line is a supply line that supplies the raw water from the raw water tank to the processing container. The end of the raw water line on the side of the processing container is usually connected to the upper part of the processing container, but it may be connected so that the tip is inserted into the processing material in the processing container. The treated water line is a supply path that is connected to the treatment vessel and supplies the treated water generated by circulating the raw water in the treatment vessel. The connection position of the treated water line to the treatment vessel is the position where the treated material is sandwiched from the tip of the raw water line so that the raw water flows through the treated material and then flows out from the treated water line. The bottom of the container, but not limited to this. A water supply pump for sucking raw water and sending it under pressure is inserted in the water passage. This insertion position is the raw water line between the raw water tank and the treatment container or the treated water line on the outlet side of the treatment container.

Next, the regeneration flow path includes a regeneration liquid tank, a regeneration liquid line, a processing container and a drain line in this order. The regenerant liquid tank is a means for storing a regenerant liquid that regenerates the processing material in the processing container. The regenerant line is a supply path that supplies the regenerant from the regenerant tank to the processing container. The drain line is a discharge path that is connected to the processing container and discharges the regeneration liquid that has finished the regeneration action. The flow of the regenerant liquid to the processing container is performed by providing a regenerant liquid tank above the processing container by a gravity free gravity method, or by generating a flow of raw water and generating a jet pump action by this flow. In the case of using a jet pump, the raw water and the regenerated liquid are mixed and supplied to the processing container. If it is necessary to dilute the concentration of the regenerated liquid, connect the raw water flow line where the raw water flows down from the raw water tank by spontaneous fall before the treatment container of the regenerated liquid line or before the treatment material in the treatment container. Then, the regenerant liquid in the regenerant line and the raw water in the raw water flow-down line are mixed and diluted, and then supplied to the processing container. When a regenerant liquid adjusted to an appropriate concentration is stored in the regenerant liquid tank, no means for this mixing is necessary.

The extrusion flow path includes a raw water tank, a raw water downflow line, a processing vessel, and a drain line in this order, and the raw water tank is positioned above the processing vessel so that the raw water is naturally dropped by gravity to feed the raw water tank-raw water downflow line-processing vessel. -Distribute with the drain line. The raw water flow-down line of the extrusion channel is a free fall type, and the raw water line of the water flow channel is forced water flow by a pump, so both lines are basically separate lines, but some of them must be shared. Is possible.

The cleaning flow path includes a raw water tank, a raw water line, a processing container, and a drain line in this order, and a water supply pump is inserted in the raw water line between the raw water tank and the processing container. The raw water line of the cleaning flow passage can share the water supply pump of the water passage and a part of the raw water line so that the water supply pump can be inserted in the raw water line of the cleaning flow passage. Further, the raw water line of the cleaning channel may or may not share a part of the treated water line. Further, it is desirable that the drain line of the washing channel shares the drain line of the extrusion channel, but it can be provided separately.

The switching means comprises a switching valve device and a control device for controlling the valve device and the water supply pump. The switching valve device is composed of a plurality of valves inserted in the water flow passage, the regeneration flow passage, the push-out flow passage, and the washing flow passage, and by controlling the open / closed state (in other words, pattern) of each valve, the different open / close It is formed by opening and closing the water flow passage, the regeneration flow passage, the extrusion flow passage, and the washing flow passage according to the state. The switching valve device may be configured to control opening / closing by mechanically interlocking a plurality of valves with a cam mechanism, or may be configured with a plurality of different solenoid valves and electrically interlocking with each other. The control device controls the opening / closing state of the switching valve device and the drive / stop of the water supply pump in response to the water passing process, the regenerating process, the pushing process and the washing process. That is, in the water passing process,
The water passage is formed and the water supply pump is driven to circulate the raw water through the water passage. In the regeneration step, the regeneration channel is formed and the regeneration liquid is circulated through the regeneration channel. In the extrusion step, the extrusion channel is formed and the raw water is circulated through the extrusion channel by natural fall. In the cleaning process, the cleaning channel is formed and the water supply pump is driven to flow the raw water through the cleaning channel. The control of the water supply pump in the water passage process and the washing process is performed by detecting the flow of water in the water passage or the washing passage and the fluctuation of the water pressure, but the control is performed in conjunction with the switching of the process, that is, the water passage process. Alternatively, it may be configured to be driven by receiving a start signal of the cleaning process.

In the above-described embodiment, when a certain condition is satisfied, the cleaning process may be automatically performed and then the water-passing process may be performed. An example of the condition is when it is detected that the raw water or the treated water does not flow in the water passage for a predetermined time or longer. As the detection means for this condition, the flow of raw water or treated water is to be directly detected, but the process control from the switching means, that is, the indirect detection to detect that there is no command signal for the water passage process for a predetermined time or longer. It may be detection. When the detection unit detects that the raw water or the treated water does not flow for a predetermined time (for example, 24 hours), the control device shifts to the cleaning process and performs the cleaning process for a predetermined time (for example, about 5 minutes). As a result, the raw water in the raw water tank is sucked by the pump action of the water supply pump,
It circulates in the processing container and rapidly pushes out the residual water in the processing container to prepare for the water passing step. At the same time, the raw water stored in the raw water tank is discharged, so that the raw water tank can be replaced with new raw water. In addition, other conditions for performing the cleaning process include:
It is when the controller is reset.

Next, as an embodiment corresponding to claim 2 of the present invention, a raw water in a raw water tank is driven by a water supply pump to sequentially pass through a treatment container containing a treatment material and a treatment water line. , A regeneration process in which the regeneration liquid in the regeneration liquid tank is sequentially circulated to the treatment container and the drain line, an extrusion process in which the raw water in the raw water tank is sequentially circulated to the treatment container and the drain line by natural fall, and the raw water in the raw water tank is fed by a water supply pump. A water treatment method comprising a treatment container and a washing step of sequentially circulating the drain line.

To explain this embodiment, this embodiment is carried out in the embodiment of the invention corresponding to the above-mentioned claim 1. The feature of the method of this embodiment is that a cleaning step is provided in which the raw water in the raw water tank is sequentially circulated to the treatment container and the drain line by the water supply pump.By performing this step, rapid cleaning of the inside of the treatment container and The raw water in the raw water tank can be rapidly discharged. This cleaning step is effective when the raw water in the raw water tank has not been used for a long time or when it is necessary to discharge the residual water in the processing container for some reason.

[0015]

EXAMPLES The above-described two embodiments of the invention are embodied in a domestic water softening device in which the treatment material is an ion exchange resin and the regenerant is saline. An embodiment applied to this water softening device will be described below with reference to the drawings.

1 to 5 are schematic explanatory views showing the constitution of a water softening (softening water) apparatus embodying the present invention, showing a water passing step, a priming step, a regenerating step, an extruding step, and a washing step, respectively. . Reference numeral 1 denotes a resin cylinder (cylindrical resin processing container), in which a predetermined amount of silica stone 2 as a resin holding member is accommodated in the lower portion of the resin cylinder 1.
A predetermined amount of ion-exchange resin (treatment material) 4 is housed between it and a wire net 3 as a resin holding member installed in the upper part of the. A raw water tank 5 and a salt water tank (regeneration liquid tank) 6 are provided in parallel above the resin tube 1, and a raw water inlet 7 provided at the bottom of the resin tube 1 and a lower portion of the raw water tank 5 are connected by a raw water line 8. In the raw water line 8, a water supply pump 9, a first check valve G1 for blocking the flow in the direction of the water supply pump 9, a flow switch (water flow detection means) 10, a pressure switch (pressure detection means) 11, and a first valve V1. Inserted sequentially from the upstream side. A soft water outlet 12 is provided in the upper part of the resin cylinder 1, a soft water line (treated water line) 13 is connected to the soft water outlet 12, and a second valve V2 and an accumulator 14 are inserted in the middle. Then, the downstream side of the second valve V2 of the soft water line 13, the pressure switch 11 of the raw water line 8 and the first valve V1 are connected by a bypass line 15 so as to be branched from the raw water line 8, and in the middle thereof. The third valve V3 is inserted in. The bypass line 15 is for avoiding water cutoff during the regeneration of the ion exchange resin 3 in the resin cylinder 1. The accumulator 14 is used for the soft water line 13
The number of times of starting and stopping the water supply pump 9 due to leakage of choro from a faucet (not shown), outflow of choro, etc. is reduced.

Further, the lower part of the salt water tank 6 and the soft water line 1
2 is connected to a position close to the soft water outlet 12 by a salt water downflow line (regeneration liquid line) 16, and this salt water downflow line 1
Second check valve G for preventing flow in the direction of salt water tank 6 in 6
2 and the fourth valve V4 are sequentially inserted from the upstream side. Then, the downstream side of the fourth valve V4 of the salt water downflow line 16 and the downstream side end of the raw water downflow line 17 connected to the lower part of the raw water tank 5 are connected in front of the resin cylinder 1. A third check valve G3 that blocks the flow in the direction of the raw water tank 5 is inserted in the raw water flow line 17. Then, the drain line 18 is connected to the raw water inlet portion 7 provided in the lower portion of the resin cylinder 1, and the fifth valve V5 is inserted in the middle thereof.

The raw water tank 5 has a water level control device 19
(For example, a ball tap system) is provided, and a raw water supply line 20 for supplying raw water such as tap water is connected by the water level control device 19. Net 2 in the salt water tank 6
1 is provided, the salt 22 is placed on the net 21, and the lower portion of the net 21 of the salt water tank 6 is divided into a first portion 6A and a second portion 6B by a partition body 23. . The first portion 5A and the raw water tank 5 are connected by a replenishing water line 24 so that the raw water is supplied to the salt water tank 6. Reference numeral G4 is a fourth check valve that is inserted into the makeup water line 24 and blocks the flow in the direction of the raw water tank 5. The partition wall 23 is a member for preventing the raw water supplied from the raw water tank 5 and the already formed saturated salt water from being mixed in the lower portion of the salt water tank 6 during the regeneration process. In addition, the salt water downflow line 16 is connected to the bottom of the second portion 6B. The salt 22 on the net 21 is dissolved in the raw water supplied from the raw water tank 5 to generate saturated salt water. The raw water tank 5 and the salt water tank 6 are respectively the raw water overflow pipe 2
5. A salt water overflow pipe 26 is provided. In the above description of the embodiments, a line means a flow path or a path, and more specifically, a pipeline.

In the above structure, the water passage, the priming passage, the regeneration passage, the extrusion passage, and the washing passage corresponding to each water passage step, priming step, regeneration step, extrusion step, and washing step are arranged. explain. The water flow passage includes a raw water tank 5-raw water line 8-resin cylinder 1-treated water line 13 in that order. This water flow passage includes the water supply pump 9, the first check valve G1, the first valve V1, and the second valve V2. The priming water flow path sequentially includes a raw water tank 5-a part of the raw water line 8 (including the water supply pump 9) and a drain line 18. In this priming passage, there are a first check valve G1 and a first valve V.
1, the fifth valve V5 is included. The regeneration channel is made by mixing salt water (regeneration liquid) having a high concentration with raw water that dilutes it into a resin cylinder 1
Of the raw water tank 5-the raw water flow line 17 and the salt water tank 6-the salt water flow-down line 16-a part of the soft water line 13-the resin cylinder 1-the drain line 18 in order. Including line. In this regeneration flow path, the second check valve G2, the fourth valve V4, the fifth valve V5, the third
A check valve G3 is included. The extrusion channel is the raw water tank 5
The raw water flow line 17-the resin cylinder 1-the drain line 18 are sequentially included. The extrusion flow path includes the third check valve G3 and the fifth valve V5. The washing channel is a raw water tank 5-raw water line (a part of the raw water line 8-the bypass line 15-a part of the soft water line 13 and is a raw water line in the sense that raw water flows during the washing process) -resin The cylinder 1 and the drain line 18 are sequentially included. As described above, the raw water line of the cleaning flow path shares the portion of the bypass line 15 where the third valve V3 is inserted and the portion of the soft water line 13 where the second valve V2 is inserted. This is for simplicity. A first check valve G1, a third valve V3, and
The second valve V2 and the fifth valve V5 are included.

First valves V1 to V5 included in each of the above flow paths
The valve V5 is configured as a switching valve device VA which is opened and closed by a cam mechanism (not shown) in this embodiment, but can be configured by five separate solenoid valves. The cam mechanism is driven by the valve drive motor 31, and the rotational position is controlled so as to correspond to each process. The switching valve device VA controls the open / closed state of each valve to form a water flow passage, a priming flow passage, a regeneration flow passage, a pushing flow passage, and a washing flow passage in correspondence with the different open / closed states. Also, the second check valve G2 to the fourth
The check valve G4 is integrally provided in one check valve box (not shown).

The switching valve device VA and the water supply pump 9 are controlled by a control device C including a microcomputer as shown in FIG.
Flow switch 10, pressure switch 11, switching valve device V
Position detecting means 3 for detecting the switching state of A (position of each process)
It is controlled by inputting signals from 3 and the like. When the flow switch 10 detects a predetermined first set flow rate, it outputs a water flow presence signal (water feed pump drive request signal), and when it detects a second set flow rate which is a predetermined value smaller than the first set flow rate, it outputs no water flow signal ( Water supply pump stop request signal) is output and pressure switch 1
Reference numeral 1 outputs a water feed pump drive request signal when it is detected below a first set pressure, and outputs a water feed pump stop request signal when it is detected above a second set pressure which is a predetermined value higher than the first set pressure. As shown in FIG. 7, the control by the control device C includes initial setting control CA, water flow control CB, regeneration control CC, and cleaning control C.
It is roughly divided into D. The initial setting control CA is a control that is performed when a reset switch (not shown) is operated, such as a reset switch (not shown). The cleaning process SJ and the origin setting process SG (the water passing process ST in which the switching valve device VA is the origin position). Position and control). The water flow control CB is a control for performing the water flow process ST at the water flow process ST position of the switching valve device VA. The regeneration control CC is control for regenerating the ion exchange resin when the water passing step ST is performed for a predetermined number of days and the current time is equal to the regenerating time. The priming step SY and the regenerating step S are performed.
S, the extrusion process SO, the cleaning process SJ, and the origin setting process SO are sequentially performed. Each priming process, regeneration process, extrusion process, and cleaning process includes detection of each process position and execution of the process.
Here, in the normal (normal) regeneration control, the cleaning step S
J is not always necessary. The cleaning control CD is a control for performing the cleaning process when the flow switch 10 satisfies a predetermined condition such as no flow detection for a predetermined time (for example, 24 hours or more). An example of the cleaning control CD is as shown in FIG.

Each of the above controls in this embodiment will be described below. First, the water flow control CB will be described. FIG.
Referring to, the switching valve device VA is controlled to the water passing process position by the initial setting control CA. This process position control is performed by rotationally driving a cam mechanism that controls the open / closed state of the switching valve device VA, and detecting the rotational position by the position detection means 33. The open / closed state of the switching valve device VA in the water passing step ST is the first valve V1: open, the second valve V2: open, the third valve V3: closed, the fourth valve V4: closed, and the fifth valve V5: closed. It
Then, when the tap is opened, the raw water in the raw water tank 5 flows into the resin cylinder 1 through the raw water line 8. As a result, a signal indicating the presence of water flow from the flow switch 10 or the pressure switch 11
The water supply pump 9 is driven by a detection signal of a predetermined pressure or less, and raw water is passed from the lower portion of the resin cylinder 1 as an upward flow. By this water flow, the raw water is softened by the action of the ion exchange resin 4, and is supplied to the faucet through the soft water line 13 from the soft water outlet 12 provided at the upper portion of the resin cylinder 1 as soft water (treated water). In this water passing step, the third check valve V3
Due to the blocking action of, the flow of treated water from the outlet 12 of the resin cylinder 1 to the raw water tank 5 is blocked.

Next, the regeneration control C for regenerating the ion exchange resin 3 will be described. In this regeneration control, the priming process SY of FIG. 2 is performed for a predetermined time (for example, several seconds to several tens of seconds) before entering the regeneration process SS, which will be described. Since the switching valve device VA is provided above the resin cylinder 1 or laterally above the resin cylinder 1, the drain line 18 is provided.
Is not directly piped downward, but is piped upward from the lower part of the resin cylinder 1 to the fifth valve V5 of the switching valve device VA, and then inverted and then piped downward. ing. Therefore, when air flows into the drain line 18, the head pressure difference cannot be taken, and the raw water and the salt water may not flow smoothly through the drain line 18 during the regeneration process SS. The priming process SY is a process of filling the route through which the raw water or the salt water flows in the regeneration process SS, particularly the drain line 18 with the raw water, in order to eliminate such a problem. The open / closed state of the switching valve device during the priming process is as follows: first valve V1: open, second valve V2: closed, third valve V3:
The fourth valve V4 is opened and the fifth valve V5 is opened. As a result, when the raw water in the raw water tank 5 flows into the resin cylinder 1, a signal indicating that there is a water flow from the flow switch 10 is output, or a detection signal below the predetermined pressure of the pressure switch 11 is output, The water supply pump 9 is driven. The raw water flows through the raw water line 8-the drain line 18, the air in the flow passage is evacuated and filled with the raw water, and the raw water line 8-through the resin pipe 1 and between the resin pipe 1 and the second check valve G2. And the flow path from the resin cylinder 1 to the third check valve G3 is filled with raw water. After the priming process SY is performed for a predetermined time, the process proceeds to a salt water regeneration process SS.

Next, the regeneration process SS will be described. The open / closed state of the switching valve device VA during this step is, as shown in FIG. 3, a first valve V1: closed, a second valve V2: closed, and a third valve V3:
The fourth valve V4 is opened and the fifth valve V5 is opened. As a result, the saturated salt water in the salt water tank 6 flows down by gravity through the salt water flow line 16. On the other hand, the raw water in the raw water tank 5 flows down through the raw water flow line 17, and saturated salt water and raw water are mixed at the soft water outlet 12 which is an inlet of the regenerant during the regeneration process. Then, it becomes a salt water of a predetermined concentration (about 10%), flows down from the upper part of the resin cylinder 1, and flows into the ion exchange resin 4
To play. The salt water after regeneration is discharged to the outside of the system through the drain line 18. Since the third valve V3 is opened during this regeneration process, when the user at home opens the faucet (not shown) connected to the end of the soft water line 13, a water flow is generated and water is supplied by the operation of the flow switch 10. The pump 9 is driven.
As a result, since the raw water is supplied through the raw water tank 5-a part of the raw water line 8-the bypass line 15-a part of the soft water line 13, the use of the water is not hindered. Then, this salt water regeneration process is executed for a predetermined time (for example, about 15 minutes). That is, when a predetermined amount of salt water is flowed down and the regeneration of the ion exchange resin 4 is completed, the process proceeds to the next extrusion step SO.

The extrusion step SO will be described. The open / closed state of the switching valve device VA during this step is, as shown in FIG. 4, the first valve V1: closed, the second valve V2: closed, and the third valve V3:
The valve is opened, the fourth valve V4 is closed, and the fifth valve V5 is opened. As a result, the raw water in the raw water tank 5 naturally falls through the raw water flow line 17 and flows into the resin cylinder 1, and the salt remaining in the ion exchange resin 4 is pushed out and washed with water. The water after the water washing is discharged to the outside of the system through the drain line 18. This extrusion step SO is executed for a predetermined time (for example, about 120 minutes), a predetermined amount of raw water is caused to flow down, salt is extruded, and regeneration is completed. After the completion of the regeneration, the washing process described below is performed to return to the water passing process. The washing step is not always necessary for normal regeneration control.

During the regeneration process, the raw water tank 5 replenishes the salt water tank 6 with water. That is, referring to FIG. 3, the saturated salt water already generated and stored during the regeneration step flows down through the salt water flow-down line 16, and along with this flow, the raw water from the raw water tank 5 to the salt water tank 6 passes through the replenishment water line 24.
It flows into the inner first portion 6A, passes over the upper end of the partition wall 23, and flows into the second portion 6B. Therefore, as the saturated salt water flows down, the raw water is replenished as much as the water level of the saturated salt water decreases. However, due to the difference in specific gravity, the raw water layer with a low concentration is located above the saturated salt water layer, and this two-layer state is relatively While maintaining, the saturated salt water is allowed to flow down. The water level in the salt water tank 6 due to this replenishment is performed by the action of the water level control device 19 of the raw water tank 5, flows into a predetermined water level above the net 21, and the salt is dissolved in the raw water to thereby obtain saturated salt water at the time of regeneration. Generate and store. Regeneration control C finally becomes saturated salt water
It will be after the end of C.

Next, the cleaning control CD will be described. Referring to FIG. 8, step S1 (hereinafter SX is step SX
It means that the flow switch 10 determines whether or not there is a water flow. If NO is determined here, S2
The process proceeds to S3 to start counting the no water flow time, and then proceeds to S3 to determine whether the water flow no time has been counted for a predetermined time (for example, 24 hours). If NO, the process returns to S1. Thus, when no water flow is continuously counted for a predetermined time, S3
To the cleaning process ST, the position of the cleaning process is detected in ST, and the cleaning process is executed for, for example, about 5 minutes.

The execution of this cleaning step SJ will be described. As shown in FIG. 5, the open / close state of the switching valve device VA in this step is as follows: the first valve V1: closed, the second valve V2: open, the third valve V.
3: open, 4th valve V4: closed, 5th valve V5: open. As a result, the water supply pump 9 is driven by the operation of the flow switch 10 or the pressure switch 11 as the raw water in the raw water tank 5 flows down the raw water line 8. Raw water tank 5
The raw water inside is part of the raw water line 8 by the suction and discharge actions of the water supply pump 9, the bypass line 15 and the soft water line 13.
Through a cleaning flow path composed of a part thereof, a resin cylinder 1 and a drain line 18. In this way, the amount of raw water supplied to the resin cylinder 1 per unit time by the action of the water supply pump 9 becomes larger (for example, about 15 times) than in the extrusion process, and the residual water in the resin cylinder 1 rapidly becomes system. It is discharged to the outside. When the cleaning process SJ of S4 is completed, the process proceeds to S4, the count of the accumulated time without water flow is cleared, and the process proceeds to the above-described origin finding process SO. Here, the water passing process ST can be executed. If YES is determined in S1, the process proceeds to S5, and the count of the accumulated time without water flow is cleared.

In the water softening device using the ion-exchange resin as in this embodiment, when the water-passing step is not performed for a long time, the resin in the resin cylinder 1 may contain organic substances having a slight color and odor. It dissolves out in the residual water in the resin cylinder 1. Further, if the raw water in the raw water tank 5 is stored for a long time without being used, it is possible that hygienic unfavorable conditions such as the propagation of various bacteria may occur depending on the installation environment of the device. However, by performing the above-mentioned washing process, the residual water in the resin cylinder 1 can be rapidly discharged, and the raw water in the raw water tank 5 can be rapidly discharged to the outside of the system, and such a problem is solved. This has the effect of promptly shifting to the next water passage step.

In this embodiment, the following control is also possible. That is, the control device C includes a battery (not shown) and can continue the clock function even during a power failure. Further, it is provided with setting means for setting the current time, the reproduction time, and the reproduction cycle (cycle for performing reproduction control). Even when these are not set, the default values (initial setting values) of the reproduction time and the reproduction cycle are set. If a power failure occurs at the playback time, playback control is performed when the power is restored, and if a power failure occurs during playback, playback is continued after the power failure is restored. Further, a manual regeneration switch (not shown) is provided, and when this switch is operated, regeneration control is forcibly executed.

Next, another embodiment of the present invention will be described with reference to FIG. This embodiment is different from the first embodiment in FIG. 1 in that the water supply pump 9 is provided in the soft water line 13 on the outlet side of the resin cylinder 1, and the water softening line 13 is branched from the outlet side of the water supply pump 9. Raw water line 50 reaching the upper part of the resin cylinder 1
The raw water line 50 is provided with a sixth valve V6, and the flow path in the cleaning process is defined by the raw water tank 5-a part of the raw water line 8-the bypass line 15 (including the third valve V3) -the soft water line 13. Part (including water supply pump 9) -Raw water line 5
0-resin cylinder 1-drain line 18 is a cleaning flow path. In addition, the flow path in the priming process is the same as the cleaning flow path. A pressure switch 11 and a flow switch 10 are provided on the outlet side of the pump 9.
Note that, in FIG. 9, the same components as those in FIGS.

In this embodiment, the first valve V1 to the fifth valve of the switching valve device VA in the water passing step, the regeneration step and the pushing step.
The open / closed state of the valve V5 is the same as that in FIGS. 1 to 5, and the sixth valve V6 is closed in each step. In addition, as shown in FIG. 9, the open / close state of the switching valve device during the cleaning process is as follows: the first valve V1: closed, the second valve V2: closed, the third valve V3: open, the fourth valve V4: closed, the fifth valve.
The valve V5 is opened and the sixth valve V6 is opened. As a result, due to the operation of the flow switch 10 or the pressure switch 11 accompanying the raw water in the raw water tank 5 flowing down the raw water line 8,
The water supply pump 9 is driven. The raw water in the raw water tank 5 is
By the suction and discharge action of the water supply pump 9, the raw water line 8 flows through a cleaning flow path including a part of the bypass line 15, a part of the soft water line 13, a raw water line 50, a resin cylinder 1 and a drain line 18. In this way, the cleaning process is performed as in the first embodiment. The open / close state of the switching valve device during the priming process is the first valve V1: closed, the second valve V2: closed, and the third valve V.
3: Open, 4th valve V4: Open, 5th valve V5: Open, 6th valve V
6: Opened.

[0033]

According to the inventions of claims 1 and 2 configured as described above, the flow rate of the raw water supplied to the processing container per unit time is increased by performing the cleaning process accompanied by the drive of the water supply pump. Therefore, it is possible to wash the inside of the processing container in a short time, quickly discharge the raw water in the raw water tank, and move to the water passing step.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a water treatment device showing a water passing step according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a water treatment device showing a priming process of an embodiment of the present invention.

FIG. 3 is a configuration diagram of a water treatment device showing a regeneration process according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a water treatment device showing an extrusion step according to an embodiment of the present invention.

FIG. 5 is a configuration diagram of a water treatment device showing a cleaning step according to an embodiment of the present invention.

FIG. 6 is a diagram showing an electrical schematic configuration of the embodiment of the present invention.

FIG. 7 is a flowchart showing a control procedure by the control device of the embodiment of the present invention.

FIG. 8 is a flow chart showing another control procedure by the control device of the embodiment of the present invention.

FIG. 9 is a configuration diagram of a water treatment device showing a cleaning process according to another embodiment of the present invention.

[Explanation of symbols]

 1 resin cylinder 4 ion exchange resin 5 raw water tank 6 salt water tank 8 raw water line 9 water supply pump 13 soft water line 16 salt water down line 17 raw water down line 18 drain line V1, V2, V3, V4, V5 valve VA switching valve device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoji Oda 7 Horie-cho, Matsuyama-shi, Ehime Prefecture Miura Kogyo Co., Ltd. (72) Inventor Yoshiyuki Fukuoka 7 Horie-cho, Matsuyama-shi Ehime, Miura Kogyo Co., Ltd.

Claims (2)

[Claims] 1. A raw water tank, a raw water line, a treatment container containing a treatment material, and a treated water line in this order, and a raw water line or a water flow passage having a feed pump inserted in the treated water line, a regenerant tank, and a regenerant line. , Regeneration flow path including treatment vessel and drain line in sequence, Extrusion flow path including raw water tank, raw water downflow line, treatment vessel and drain line, Raw water line including raw water tank, raw water line, treatment vessel and drain line A cleaning flow channel having a water supply pump inserted therein, a water flow step of driving the water supply pump to flow raw water through the water flow channel, a regeneration step of circulating a regenerant liquid through the regeneration flow channel, and a raw water flow through the extrusion flow channel And a switching means for switching between a pushing step for circulating water by natural fall and a washing step for driving the water supply pump to pass the raw water through the washing channel. Equipment. 2. A water-passing step in which raw water in a raw water tank is sequentially circulated to a treatment container containing a treatment material and a treated water line by driving a water supply pump, and a regenerant liquid in a regenerant tank is sequentially circulated to a treatment container and a drain line. A reclaiming process, a pushing process in which the raw water in the raw water tank is sequentially circulated to the treatment container and the drain line by natural fall, and a washing process in which the raw water in the raw water tank is sequentially circulated to the treatment container and the drain line by driving the water supply pump. Water treatment method.