JPH09294981A - Hard water softening apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent salt water from entering a salt water tank by a method in which a raw water tank and the salt water are connected with a water supply line equipped with a check valve which obstructs a flow toward the raw water tank, and the water level of the salt water tank is kept above a water passing member. SOLUTION: In the regeneration of an ion exchange resin, saturated salt water in a salt water tank 6 is made to flow down through a salt water flow down line 16, while raw water in a raw water tank is made to flow down through a raw water flow-down line, and the salt water and the raw water are mixed to flow down. In this process, the raw water tank and the salt water tank 6 are formed by dividing a tank 40 with a partition wall 41, and the salt water tank 6 is divided into sections 6A, 6B by a partition wall 23. A net 21 is mounted on a salt water production part 6B1 through rod-shaped support members 45, 45, the water level LW of the salt water tank 6 is set up to be slightly above the net 21. The raw water inflow hole 46 in the bottom part of the section 6A and the downflow hole of the raw water tank are connected with a water supply line 24 equipped with a check valve.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water softening device having a salt water tank and a raw water tank.

[0002]

The supply of raw water to the salt water tank of the conventional water softening device is a method of directly supplying to the salt water tank. The salt water level is controlled by providing a valve with a float so that the raw water reaches a predetermined water level. When supplied, the valve was closed by the float to stop the water supply. According to such a conventional method, there is a problem that it is necessary to use a dedicated valve having corrosion resistance and a water level control device such as a commercially available ball tap cannot be used.
Further, since the regeneration process and the water replenishment process are separately performed in time, there is a problem that the valve structure becomes complicated.

[0003]

The present invention has been made to solve the above problems, and a raw water tank provided with a water level control device for controlling the inflow of raw water from a raw water supply line according to the water level. And a salt water tank for mounting salt on the water-permeable member are provided separately or integrally via a partition wall, and the raw water tank and the salt water tank are inserted with a check valve for blocking the flow in the direction of the raw water tank. And a water softening device for holding the water level of the salt water tank above the water permeable member by the water level control by the water level control device as a first feature,

Further, according to the present invention, in the apparatus for softening water according to claim 1, the salt water tank is divided into a first portion and a second portion through a partition wall, and a replenishment line is connected to the first portion. Two
The second feature is that a salt water flow-down line is connected to the portion of.

According to the first feature described above, when the water level in the salt water tank decreases, the raw water from the raw water tank is replenished to the salt water tank through the replenishment line. When the water level in the raw water tank drops, the water level control device causes the raw water tank to supply water to a predetermined water level through the raw water supply line. Thus, the water level of the salt water tank is maintained above the water-permeable member,
Brine is produced. The salt water in the salt water tank will not flow back to the raw water tank due to the action of the check valve in the replenishment line. In this way, the water level control device of the raw water tank is protected from salt damage.

Further, according to the second feature, the raw water flowing into the salt water tank through the replenishment line first flows into the first portion, and then, after passing over the upper end of the partition wall, flows into the second portion. The inflowing raw water is prevented from immediately mixing with the salt water at the bottom of the second portion, and the concentration of salt water flowing down from the salt water downflow line during regeneration is small.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of a water softening device corresponding to claim 1 of the present invention, a raw water tank equipped with a water level control device for controlling the inflow of raw water from a raw water supply line according to the water level. , A salt water tank for mounting salt on the water-permeable member is provided separately or integrally via a partition wall, and the raw water tank and the salt water tank are inserted with a check valve for blocking the flow in the direction of the raw water tank. The water level is controlled by the water level control device, and the water level of the salt water tank is maintained above the water permeable member.

This embodiment will be described in detail below. The raw water supply line is a raw water main such as a water pipe, and the raw water tank is a container for storing the raw water supplied from the raw water supply line. The raw water tank is equipped with a water level control device connected to the raw water supply line, and the water level of the raw water tank is kept constant by the water level control device. As the water level control device, it is not necessary to use a new device, and a known device called a ball tap can be used. The salt water tank is a container for generating and storing salt water to be used in the regeneration process of the water softening device. Inside this salt water tank is equipped with a water-permeable member such as a net member, on which salt is placed,
The raw water is supplied from the raw water tank, and the water level in the salt water tank is set and held slightly above the water-permeable member to dissolve the salt in the water and finally generate saturated salt water. The raw water tank and the salt water tank are installed in parallel, that is, in parallel at approximately the same height, and they are connected by a replenishment water line, and by keeping the water level of the raw water tank constant, the water level of the salt water tank is approximately the same level as the prescribed Hold on. Strictly speaking, the water level of the salt water tank becomes lower than that of the raw water tank by the resistance of the check valve provided in the water supply line. By constructing the raw water tank and the salt water tank separately, or by providing them integrally via a partition wall, the two are defined, and a check valve for blocking the flow in the direction of the raw water tank is provided in the replenishment line. By inserting the salt water into the raw water tank, the water level control device of the raw water tank is prevented from being damaged by salt.

Next, as an embodiment of a water softening device according to claim 2 of the present invention, in the water softening device of claim 1, the salt water tank is provided with a first portion and a second part through a partition wall.
It is assumed that it is divided into a part, a replenishing water line is connected to the first part, and a salt water downflow line is connected to the second part.

This embodiment will be described in detail below. In addition to the above-described embodiment, a partition wall is erected from the bottom surface of the salt water tank to divide it into a first portion and a second portion. Then, a replenishment water line is connected to the first portion, and a salt water downflow line is connected to the second portion. With such a configuration, the raw water first flows into the first portion, gets over the partition wall, and then flows into the second portion. The second part is a salt water reservoir and the first part is a raw water inflow part. Desirably, the water-permeable member and the salt are not provided above the first portion, but they may be provided. Since the raw water does not directly flow into the second part, the concentration of the salt water flowing down from the salt water flow-down line during the regeneration process is maintained at a high level. Furthermore,
During the regeneration process, the salt water layer in the second part flows down while gradually lowering the water level, and the raw water in the second part flows softly into the salt water layer (without disturbing the salt water layer) and then onto the salt water layer. A raw water layer is formed. Of course, salt is diffused at the boundary between the salt water layer and the raw water layer.

[0011]

Embodiments of the invention described above are implemented in a domestic water softening device. This embodiment 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 portion 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.

As shown in FIG. 1, the raw water tank 5 is provided with a water level control device 19 (for example, a ball tap system), and a raw water supply line 20 for supplying raw water such as tap water is connected by the water level control device 19. I am doing it. Raw water tank 5
The salt water tank 6 and the salt water tank 6 are communicated with each other by a water replenishment line 24 having a fourth check valve G4 that blocks a flow in the direction of the raw water tank 5. The raw water tank 5 and the salt water tank 6 are provided with a raw water overflow pipe 25 and a salt water overflow pipe 26, respectively. In the above description of the embodiments, a line means a flow path or a path, and more specifically, a pipeline.

In detail, the raw water tank 5 and the salt water tank 6 are partitioned by an L-shaped first partition wall 41 as shown in FIGS. 8 and 9, and are constructed as a tank 40 integrally formed side by side with a synthetic resin. Has been done. Salt water tank 6
Is the second part in which the lower part of the tank 6 is erected from the bottom wall 40.
The partition wall 23 divides the first portion 6A and the second portion 6B. No cutouts or through holes for water passage are formed in the partition wall 23. Also, the second portion 6B is a cutout 4 for water passage.
The second partition wall 42 which forms No. 4 further causes the salt water generation unit 6B.
1 and the salt water outflow portion 6B2. The notch 44 may be formed at a portion other than the end portion of the partition wall 42 instead of the end portion. In the salt water producing portion 6B1, rod-shaped support members 45, 45 are integrally provided so as to project upward from the bottom wall.
A net (water-permeable plate-shaped member) 21 is placed and supported on the upper ends of the members 5, 45. Further, a convex portion (not shown) for supporting the net is formed on the inner peripheral wall of the tank 6, and the net 21 is supported by the supporting members 45, 45. The salt 22 is placed on the net 21. The water level LW in the salt water tank 6 is set slightly above the net 21. The height of the first partition wall 23 is substantially the same as the position of the net 21 in this embodiment.
It can be set from the lower part of the net to the lower part of the net 21. A raw water inflow hole 46 is formed at the bottom of the first portion 6A, and a salt water outflow hole 47 is formed at the bottom of the salt water outflow portion 6B2. The raw water inflow hole 46 and the first downflow hole 48A of the raw water tank 5 are connected to the replenishment line 24. And connect it to the salt water outlet 47,
6 are connected. 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. On the bottom surface of the raw water tank 5, a second downflow hole 48B to which the raw water downflow line 17 is connected and an outflow hole 49 to which the raw water line 8 is connected are formed. The diameter of the outflow hole 49 is the first,
The diameters of the second flow-down holes 48A and 48B are made larger than that of the second flow-down holes 48A, and the pipe diameter of the connection line is also adapted to that.

Further, the integrated tank 40 comprises a salt water tank 6 on a resin cylinder 1 having an outer shell formed of a synthetic resin cylinder.
Is directly placed and fixed so that is positioned above the resin cylinder 1. The resin cylinder 1 includes a lower header portion 1A having an open upper surface having a raw water inlet portion 7 formed on a side surface, an upper header 1B having an open lower surface having a soft water outlet portion 12 formed on a side surface, and both headers 1
It is composed of a tubular resin portion 1C arranged and connected between A and 1B, and is detachably fixed to one side of the synthetic resin base 60. The raw water inlet part 7 and the soft water outlet part 1
2 is formed toward the direction of the space 61 formed between the base 60 and the lower part of the tank 40 that protrudes horizontally from the resin cylinder 1 (raw water tank side), and the water supply pump is provided in this space 61. 9, an accumulator 14, a switching valve device VA and the like are arranged. The water supply pump 9 is fixed to the base 60,
The accumulator 14 is a two-part exterior cover 62 described later.
The switching valve device VA is fixed to one of A and 62B, and is fixed to the upper header 1B.

The apparatus of this embodiment has a frame (frame member) -less structure, and the tank 40 is supported by the resin cylinder 1 for a load. Then, a flange 63 is formed around the tank 40, and the lower surface of the flange 63 is supported by the base 60 at its lower end and is detachably fixed with screws.
By supporting at the upper end of 2B, the projecting side of the tank 40 (raw water tank 5 side) is supported supplementarily. In this way, the load of the tank 40 is mainly supported by the resin cylinder 1 on the base 60, and the covers 62A and 62B support the load on the base 60, thereby simplifying the frame structure of the apparatus. In addition to this, the exterior covers 62A, 62
B has a structure in which the rear side and the front side of the device are divided into two parts, and by removing the front side 62A, the switching valve device VA, the water supply tank 9 and the like can be maintained, so that the maintainability is good. Also, when used, salt is added,
Since the salt water tank side with a large load is supported by the resin cylinder 1 and the protruding side with a relatively small load is supported by the cover, deformation of the cover can be prevented and the strength such as the thickness of the cover itself can be kept low. You can Reference numeral 64 is a dish-shaped inner lid mounted on the upper surface of the tank 40, and 65 is an outer lid that can be opened and closed by a hinge mechanism.

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 a valve drive motor (not shown), and the rotational position is controlled so as to correspond to each process. This switching valve device V
A controls the open / closed state of each valve to form a water flow passage, a priming flow passage, a regeneration flow passage, a push-out flow passage, and a washing flow passage corresponding to the different open / closed states. Also, the second check valve G
The second to fourth check valves G4 are integrally provided in one check valve box 32.

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 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 finding process SG (the switching valve device VA is the origin position of the water passing process ST 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, the regenerating step SS,
Extrusion process SO, cleaning process SJ, and origination process SO
Are sequentially performed. The priming process may be unnecessary depending on the structure of the device. Each priming process, regeneration process, extrusion process,
The cleaning process includes detection of each process position and execution of the process (execution of the process means execution of operations such as priming and regeneration). The cleaning step SJ is not always necessary in normal regeneration control. 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).

The above-mentioned respective 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 G3
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 in the regeneration control.

Now referring to FIGS. 3, 8 and 9,
The replenishing water and the saturated salt water from the raw water tank 5 to the salt water tank 6 during the regeneration process will be described. That is, during the regeneration process, the saturated salt water that has already been generated and stored flows down through the salt water downflow line 16, and along with this downflow, the replenishment water line 2
Raw water flows from the raw water tank 5 into the first portion 6A in the salt water tank 6 through 1, passes over the upper end portion of the partition wall 23, and flows into the second portion 6B. Therefore, as the saturated salt water flows down, the water level LN of the saturated salt water decreases,
Raw water is replenished. Then, the raw water layer (c) having a low concentration is located above the saturated salt water layer (b) due to the difference in specific gravity, and the saturated salt water flows down without greatly disturbing the two-layer state. 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 the predetermined water level LW above the net 21, and dissolves the salt in the raw water to thereby obtain saturated salt water at the time of regeneration. Generate and store. The saturated salt water is finally obtained after a predetermined time (for example, 12 hours) after the completion of the regeneration control CC. In this way, from the start of the regeneration process, replenishment water is carried out, that is, the regeneration process and the replenishment process can be executed without time division, and at that time, it is not necessary to provide special valves and control them.

Next, the cleaning step SJ of the cleaning control CD will be described. As shown in FIG. 5, the open / close state of the switching valve device VA in this step is as follows: first valve V1: closed, second valve V2:
Open, third valve V3: open, fourth valve V4: closed, fifth 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.
The raw water in the raw water tank 5 flows through a cleaning flow path composed of a part of the raw water line 8-the bypass line 15-a part of the soft water line 13-the resin cylinder 1-the drain line 18 by the suction and discharge actions of the water supply pump 9. . Thus, the amount of raw water supplied to the resin cylinder 1 per unit time by the action of the water supply pump 9 is
Larger than the extrusion process (for example, about 15 times)
Therefore, the residual water in the resin cylinder 1 is rapidly discharged out of the system.

[0027]

As described above, according to the first aspect of the present invention, invasion of salt water into the raw water tank can be prevented, and salt damage of the water level control device can be prevented. As a result, a general-purpose water level control device can be used. Moreover, the water level of the raw water tank and the salt water tank can be controlled by one water level control device, and the structure of the water softening device can be simplified.

According to the second aspect of the present invention configured as described above, it is possible to prevent the inflowing raw water from immediately mixing with the salt water at the bottom of the second portion, and to compare the salt water concentrations flowing down from the salt water downflow line during regeneration. It becomes stable and can exhibit stable regeneration ability. Further, the valve device for performing the regenerating process and the water refilling process separately is not required, and the structure of the water softening device can be simplified.

[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 schematic cross-sectional view (cross-sectional view taken along the line BB of FIG. 9) of a main part of the same embodiment of the present invention.

FIG. 9 is a schematic vertical cross-sectional view (cross-sectional view taken along the line AA of FIG. 8) of a main part of the same embodiment of the present invention.

FIG. 10 is a perspective view of a water treatment device according to the same 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 23 Partition 40 Tank V1, V2, V3, V4, V5 Valve VA Switching Valve apparatus

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

Claims (2)

[Claims] 1. A raw water tank equipped with a water level control device for controlling the inflow of raw water from a raw water supply line according to the water level,
A salt water tank for mounting salt on the water-permeable member is provided separately or integrally through a partition wall, and the raw water tank and the salt water tank are replenished with a check valve for blocking the flow in the direction of the raw water tank. A water softening device, which is connected by a line and holds the water level of the salt water tank above the water permeable member by water level control by the water level control device. 2. The water softening device according to claim 1, wherein the salt water tank is divided into a first portion and a second portion via a partition wall, a replenishing water line is connected to the first portion, and a second portion is connected to the second portion. A water softening device, which is connected with a salt water downflow line.