阅读说明：本技术 软水树脂再生控制方法及软水机水路系统 (Soft water resin regeneration control method and water softener waterway system ) 是由 盛保敬 刘志强 贾文章 杨加礼 高文帅 巩晓峰 边文兵 丛炳俊 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种软水树脂再生控制方法及软水机水路系统,包括以下步骤：吸盐再生步骤,将盐水从盐水箱中吸出,并注入树脂罐内与软化树脂发生反应；冲洗步骤,向树脂罐注水对软化树脂进行冲洗,冲洗废水首先经废水管排出,满足设定条件后,切换冲洗废水排放方向,冲洗废水排放至所述盐水箱中。本发明的软水树脂再生控制方法基于初始的冲洗废水硬度高及含盐量高,随着冲洗过程的继续,冲洗废水的硬度降低,但是盐水浓度仍然较高,通过在冲洗步骤中将后部分冲洗废水排放至盐水箱中,既能够回收部分废水,同时充分利用了废水中的盐,达到省水省盐的目的。(The invention discloses a soft water resin regeneration control method and a water softener waterway system, which comprise the following steps: a step of absorbing salt and regenerating, which is to absorb the salt water from the salt water tank and inject the salt water into the resin tank to react with the softened resin; and a flushing step, namely injecting water into the resin tank to flush the softened resin, discharging flushing wastewater through a wastewater pipe, switching the discharging direction of the flushing wastewater after the set conditions are met, and discharging the flushing wastewater into the brine tank. The soft water resin regeneration control method is based on the initial high hardness and high salt content of the flushing wastewater, the hardness of the flushing wastewater is reduced along with the continuation of the flushing process, but the salt water concentration is still high, and the rear part of the flushing wastewater is discharged into the salt water tank in the flushing step, so that part of the wastewater can be recycled, the salt in the wastewater is fully utilized, and the purposes of saving water and salt are achieved.)

1. A soft water resin regeneration control method is characterized by comprising the following steps:

a step of absorbing salt and regenerating, which is to absorb the salt water from the salt water tank and inject the salt water into the resin tank to react with the softened resin;

and a flushing step, namely injecting water into the resin tank to flush the softened resin, discharging flushing wastewater through a wastewater pipe, switching the discharging direction of the flushing wastewater after the set conditions are met, and discharging the flushing wastewater into the brine tank.

2. The soft water resin regeneration control method according to claim 1, wherein the rinsing step further comprises a step of detecting the hardness of the rinsing wastewater, and when the hardness of the rinsing wastewater is less than a set threshold, the direction of discharging the rinsing wastewater is switched and the rinsing wastewater is discharged into the brine tank;

or in the flushing step, the flushing wastewater is firstly discharged through the wastewater pipe, the discharging direction of the flushing wastewater is switched after the first set time t1, and the flushing wastewater is discharged into the brine tank.

3. The method of controlling regeneration of soft water resin according to claim 2, wherein the first set time t1 is calculated by:

detecting the water flow Q entering the brine tank;

t1=a*M/Q；

wherein M is the set flushing water quantity, a is a constant coefficient, and the value range of a is 50-80%.

4. The method for controlling regeneration of soft water resin according to claim 1, wherein the rinsing step is a forward rinsing step of injecting water into the top of the resin tank, the water flow rinsing the softened resin from the top down, and rinsing wastewater discharged from the bottom of the resin tank.

5. The soft water resin regeneration control method according to any one of claims 1 to 4, wherein in the salt absorption regeneration step, the brine is injected from the bottom of the resin tank and the water flow is reversed from bottom to top through the softened resin.

6. The regeneration control method for soft water resin according to any one of claims 1 to 4, further comprising a back washing step of injecting water from the bottom of the resin tank containing the soft water resin and back washing the soft resin from bottom to top by the water flow, before the salt absorption regeneration step.

7. A water softener waterway system, comprising:

a resin tank filled with softened resin therein, the resin tank having a first port and a second port;

a brine tank;

the water softener waterway system comprises the following water flow passages:

the salt absorption regeneration water path is sequentially connected with a water inlet pipe, the brine tank, a second port and a first port, and a first control valve used for controlling the circulation state of the water path is arranged in the salt absorption regeneration water path;

the positive flushing waterway is sequentially connected with a water inlet pipe, the first port, the second port and a waste water pipe, and a second control valve of the circulation state of the positive flushing waterway is arranged between the second port and the waste water pipe;

and a brine tank replenishing water path connected between the second port and the brine tank, the brine tank replenishing water path being provided therein with a fifth control valve that controls a flow state of the water path.

8. The water softener waterway system of claim 7, wherein the first port is located at a top of the resin tank and the second port is located at a bottom of the resin tank.

9. The water softener waterway system of claim 8, further comprising a backwash waterway sequentially connecting the water inlet pipe, the second port, the first port and the waste pipe, wherein a circulation state of the backwash waterway is controlled by the control module.

10. The water softener waterway system of claim 9, wherein the first control valve is a two-position three-way solenoid valve, and the water inlet end of the first control valve is connected with the water inlet pipe, one water outlet end of the first control valve is connected with the salt absorption regeneration waterway, and the other water outlet end of the first control valve is connected with the back washing waterway;

the second control valve is a two-position three-way electromagnetic valve, one of the water inlet ends of the second control valve is connected with the first port, the other water inlet end of the second control valve is connected with the second port, and the water outlet end of the second control valve is connected with the waste water pipe.

Technical Field

The invention belongs to the technical field of water treatment, and particularly relates to a soft water resin regeneration control method and a water softener waterway system.

Background

Generally, tap water contains a large amount of calcium ions and magnesium ions, the hardness of the water is high, scaling is easy to occur at high temperature, and the service life of a boiler and a water heater can be directly influenced. With the improvement of the requirements of people on the living quality, the water softener also has wide application in the aspect of drinking water. At present, the soft water resin in the water softener is used for softening hard water by adsorbing and replacing calcium and magnesium ions in water, specifically, the calcium and magnesium ions in the water are exchanged and adsorbed by utilizing hydrogen ions bound on the soft water resin so as to reduce the concentration of the calcium and magnesium ions in the water, but a certain amount of hydrogen ions on the soft water resin are completely exchanged and replaced, so that the water cannot be softened any more, and at this time, the soft water resin needs to be reduced and regenerated.

The regeneration of the soft water resin needs to discharge waste water, the amount of the waste water discharged in each regeneration step is different according to the difference of the resin amount, and the 1T water softener is taken as an example, the water amount consumed by the soft water resin in one regeneration is about 30L-60L, which causes huge waste of water resources.

Disclosure of Invention

The invention provides a soft water resin regeneration control method aiming at the problems of water and salt waste in the regeneration process of the soft water resin of the existing water softener, and can solve the problems.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

a soft water resin regeneration control method comprises the following steps:

a step of absorbing salt and regenerating, which is to absorb the salt water from the salt water tank and inject the salt water into the resin tank to react with the softened resin;

and a flushing step, namely injecting water into the resin tank to flush the softened resin, discharging flushing wastewater through a wastewater pipe, switching the discharging direction of the flushing wastewater after the set conditions are met, and discharging the flushing wastewater into the brine tank.

Further, the step of flushing also comprises the step of detecting the hardness of the flushing wastewater, when the hardness of the flushing wastewater is less than a set threshold value, the discharging direction of the flushing wastewater is switched, and the flushing wastewater is discharged into the brine tank;

or in the flushing step, the flushing wastewater is firstly discharged through the wastewater pipe, the discharging direction of the flushing wastewater is switched after the first set time t1, and the flushing wastewater is discharged into the brine tank.

Further, the first set time t1 is calculated by:

detecting the water flow Q entering the brine tank;

t1=a*M/Q；

wherein M is the set flushing water quantity, a is a constant coefficient, and the value range of a is 50-80%.

Further, the washing step is forward washing, water is injected into the top of the resin tank, water flows wash and soften the resin from top to bottom, and washing wastewater is discharged from the bottom of the resin tank.

Further, in the salt absorption regeneration step, brine is injected from the bottom of the resin tank, and water flow reversely passes through the softened resin from bottom to top.

Furthermore, a back washing step is included before the salt absorption regeneration step, water is injected from the bottom of the resin tank containing the soft water resin, and the soft water resin is washed back by water flow from bottom to top.

The invention also provides a water softener waterway system, which comprises:

a resin tank filled with softened resin therein, the resin tank having a first port and a second port;

a brine tank;

the water softener waterway system comprises the following water flow passages:

a water inlet section of the salt absorption regeneration water path is sequentially connected with a water inlet pipe, a brine tank and the second port, a water outlet section of the salt absorption regeneration water path is connected with the first port, and a first control valve used for controlling the circulation state of the water path is arranged in the salt absorption regeneration water path;

washing, wherein the water inlet section of the washing device is connected between the water inlet pipe and the first port, the water outlet section of the washing device is provided with two paths, one path of the washing device is connected between the second port and the waste water pipe, the other path of the washing device is connected between the second port and the brine tank, and a second control valve for controlling the circulation state of the two paths of the water outlet sections is arranged in the washing water path.

Further, the first port is located at the top of the resin tank, and the second port is located at the bottom of the resin tank.

Furthermore, the water softener waterway system further comprises a backwashing waterway, wherein the water inlet section of the backwashing waterway is connected between the water inlet pipe and the second port, and the water outlet section of the backwashing waterway is connected with the first port.

Furthermore, the first control valve is a two-position three-way electromagnetic valve, the water inlet end of the first control valve is connected with the water inlet pipe, one water outlet end of the first control valve is connected with the water inlet section of the salt absorption regeneration water path, and the other water outlet end of the first control valve is connected with the water inlet section of the back washing water path;

the second control valve is a two-position three-way electromagnetic valve, one of the water inlet ends of the second control valve is connected with the first port, the other water inlet end of the second control valve is connected with the second port, and the water outlet end of the second control valve is connected with the water outlet section of the backwashing water channel.

Compared with the prior art, the invention has the advantages and positive effects that: the method for controlling the regeneration of the soft water resin utilizes the regenerated salt contained in the waste water discharged after the salt absorption and regeneration of the soft resin, and recycles part of washing water to the salt water tank in the washing step, thereby recycling part of the waste water, fully utilizing the salt in the waste water and achieving the purposes of saving water and salt.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of an embodiment of a method for controlling regeneration of soft water resin according to the present invention;

FIG. 2 is a schematic diagram of an embodiment of a water softener waterway system according to the present invention;

fig. 3 is a table showing the states of the valve elements of the water circuit system of the water softener of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.

It should be noted that the terms "first", "second", "third", "fourth" and "fifth" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

First embodiment, this embodiment proposes a method for controlling regeneration of soft water resin, as shown in fig. 1, including the following steps:

a step of absorbing salt and regenerating, which is to absorb the salt water from the salt water tank and inject the salt water into the resin tank to react with the softened resin; in the step, the salt water and the softened resin are subjected to chemical reaction, so that the resin has a soft water function again, the reacted wastewater contains a large amount of calcium and magnesium ions and is high in hardness, the wastewater is discharged out of the soft water machine, and the salt water is not sucked into the resin tank any more when the step is finished.

And a flushing step, namely injecting water into the resin tank to flush the softened resin, discharging flushing wastewater through a wastewater pipe, switching the discharging direction of the flushing wastewater after the set conditions are met, and discharging the flushing wastewater into the brine tank. After the salt absorption regeneration step is finished, high-concentration brine still remains in the resin tank, and therefore, the brine needs to be washed away to supply water for subsequent water-using equipment (such as a water purifier, a water heater, a boiler and the like), the traditional mode is that washing wastewater is directly discharged, and taking a 1T specification water softener as an example, the washing step consumes about 15L of water, so that water resource waste is caused. It can be known through the analysis of the washing waste water that the calcium magnesium ion content that is displaced out in the waste water of initial emission is higher, along with the continuation of washing process, most calcium magnesium ion is along with washing waste water discharge, a small part of calcium magnesium ion is absorbed by soft water resin, therefore the calcium magnesium ion content in the resin tank can be reduced to 0, and salt water concentration is still higher, the water consumption of washing that generally sets up is with can all wash away salt water as the standard, prevent that salt water from getting into rear end water equipment and corroding metal inner bag, pipeline, pipe connector etc. through retrieving this part of washing waste water (hardness is low and contain salt) to the salt water tank in this scheme, because this part of washing waste water contains salt, can reduce the salt consumption of the supplementary salt of salt water tank. And the traditional step of replenishing water to the brine tank is avoided, and the purpose of saving water is achieved.

The condition for recovering the flushing wastewater to the brine tank should be that the hardness is low, the wastewater with high hardness is prevented from being recovered to the brine tank, the wastewater is sucked to the resin tank again when the salt is sucked and regenerated, the regeneration efficiency is reduced, the condition setting can be performed in various ways, as a preferred embodiment, the flushing step further comprises a step of detecting the hardness of the flushing wastewater, and when the hardness of the flushing wastewater is less than a set threshold value, the discharging direction of the flushing wastewater is switched, and the flushing wastewater is discharged to the brine tank; the time node for starting to recycle the flushing wastewater is determined by directly detecting the hardness of the flushing wastewater in the scheme. This kind of control mode is most accurate effective, and can guarantee that the reclaimed water has the recovery waste water of the maximum when lower low rigidity, and the waste water of retrieving is earlier moreover, contains salt concentration and is higher, further reduces to the salt supplementing amount of brine tank.

The manner of detecting the hardness of the rinsing wastewater can be realized by detecting the TDS value (abbreviation of total dissolved solids, i.e. inorganic salts and organic substances dissolved in water), the conductivity and the like in the water.

As another implementation, the discharge direction of the wastewater can be controlled to be switched according to the discharge time estimated from the empirical value, specifically, in the flushing step, the flushing wastewater is firstly discharged through the wastewater pipe, and the discharge direction of the flushing wastewater is switched and the flushing wastewater is discharged into the brine tank after the first set time t 1. Taking a 1T specification water softener as an example, the flushing step consumes about 15L of water, wherein the hardness of the flushing wastewater of the last 5L is close to 0, but the brine concentration is higher, and the discharge time of the flushing wastewater of the last 5L is calculated according to the flow meter in the scheme, so that the flushing wastewater with high salinity and low hardness is recycled to the brine tank.

In the step of controlling and switching the wastewater discharge direction according to the discharge time, the first set time t1 is calculated by:

detecting the water flow Q entering the brine tank, and realizing the detection of the inflow water flow by arranging a flow sensor in the water inlet pipe;

t1=a*M/Q；

wherein M is the set flushing water quantity, a is a constant coefficient, and the value range of a is 50-80%.

The best effect is achieved when the value of a is about 2/3.

The rinsing water amount M may be a fixed value or may be obtained by calculation, and when it is obtained by calculation, it is related to the resin filling amount, the total amount of water produced from the softened resin, and the like.

The washing step is forward washing, water is injected to the top of the resin tank, water flows wash and soften the resin from top to bottom, and washing wastewater is discharged from the bottom of the resin tank. The water flow compresses the resin from top to bottom, and the technical effect of the method is that the speed of the water flow passing through the resin is slowed down in the soft water process, so that the time for softening the water by the resin is more sufficient.

In the step of absorbing salt and regenerating, salt water is injected from the bottom of the resin tank, and water flow reversely passes through the softened resin from bottom to top. The soft water resin at the bottom of the resin tank always contacts with the newly converged salt water, so that the part of the soft water resin can reach a high regeneration degree. In addition, the salt water reversely passes through the softened resin from bottom to top to disperse the resin, and the salt water can fully act with the soft water resin on the upper layer in the flowing process of the salt water, so that the regeneration of the soft water resin on the upper layer is realized.

Because the water flow in the process of preparing the soft water is from top to bottom, the soft water resin is pressed firmly by the long-term action of the water pressure, in order to further enhance the full contact between the salt water and the soft water resin in the step of absorbing the salt and regenerating, a back washing step is also included before the step of absorbing the salt and regenerating, the water injection direction of the back washing is opposite to the water flow direction of the normal soft water preparation, namely, water is injected from the bottom of the resin tank containing the soft water resin, and the water flow reversely washes the soft resin from bottom to top. Raw water is injected in the step, the main function of the step is to disperse the resin, so that preparation is made for next salt absorption, and the salt water can be in more full contact with the resin.

The rinsing step includes a slow rinsing regeneration step of slowly rinsing the soft water resin with water to remove and replace the salt, and a fast rinsing step of slowly rinsing the salt in the soft water resin, specifically, by controlling the flow rate of the inlet water. Meanwhile, a large amount of calcium and magnesium ions of functional groups are exchanged by sodium ions in the brine in the slow washing process, so that the step can still regenerate the soft water resin, and the soft water resin is ensured to be regenerated more fully.

A fast rinsing step, which is mainly used to rinse small amounts of calcium magnesium ions and brine. Therefore, the brine remained on the soft water resin can be fully washed clean, the soft water resin can be applied to the water softening occasion again, and the soft water resin remained on the brine is prevented from polluting the water to be softened. Preferably, the water inlet speed in the step is larger than that in the slow washing regeneration step, and the water can flow through the resin for washing at a flow rate close to the actual work. Therefore, water can be saved, and the flushing effect and the flushing efficiency are ensured. The number of fast rinsing in this step is preferably 1 to 3, and specifically, the number of rinsing the softened resin with raw water may be determined according to the water quality parameter value of the rinsing water. Therefore, the soft water resin can be ensured to be washed cleanly, and the overall regeneration efficiency is improved.

Because calcium and magnesium ions are mainly used for washing a small amount of calcium and magnesium ions and brine in the quick washing step, it is preferable that a node for switching the discharge direction of the washing waste water should be provided in the quick washing step.

In order to prevent the overflow caused by too much flushing wastewater filled in the brine tank, the method also comprises the step of detecting the water level of the brine tank, and when the water level of the brine tank exceeds a set value, the flushing wastewater is stopped being discharged to the brine tank, and the flushing wastewater can be discharged through a wastewater pipe by switching the discharge direction.

Second embodiment, this embodiment also proposes a water softener waterway system, as shown in fig. 2, which includes a resin tank 10 and a brine tank 16, wherein the resin tank 10 is filled with softened resin, and the resin tank 10 has a first port 101 and a second port 102; the brine tank 16 contains brine for regenerating the softened resin. The water softener waterway system of the embodiment comprises the following water flow passages:

and a salt absorption regeneration water path 20 to which the water inlet pipe 17, the brine tank 16, the second port 102, and the first port 101 are connected in this order, and the salt absorption regeneration water path 20 is provided with a first control valve 11 for controlling a flow state of the water path. During the salt absorption regeneration process, the first control valve 11 controls the water path to circulate, raw water in the water inlet pipe 17 enters the salt absorption regeneration water path 20 through the first control valve 11, and when the raw water passes through the brine tank 16, brine is sucked out of the brine tank and injected into the resin tank 10 from the second port 102 to react with softened resin. The salt water and the softened resin are subjected to chemical reaction, so that the resin has a soft water function again, the reacted wastewater contains a large amount of calcium and magnesium ions and is high in hardness, the wastewater is discharged out of the soft water machine through the first port 101 and the wastewater pipe 18, and the first control valve 11 controls the salt absorption regeneration water path 20 to be cut off and circulate when the step is finished.

And a positive flushing waterway 30 which is connected with the water inlet pipe 17, the first port 101, the second port 102 and the waste water pipe 18 in sequence, wherein a second control valve 12 of the circulation state is arranged between the second port 102 and the waste water pipe 102. In the positive flushing process, the positive flushing water path 30 circulates, raw water in the water inlet pipe 17 enters the resin tank 10 through the first port 101 to flush softened resin, and flushing wastewater is discharged through the wastewater pipe.

And a brine tank replenishing water path 40 connected between the second port 102 and the brine tank 16, the brine tank replenishing water path 40 being provided therein with a fifth control valve 15 that controls a flow state of the water path.

In the process of flushing the softened resin, flushing wastewater is firstly discharged through the wastewater pipe, the fifth control valve 15 is not conducted, after a set condition is met, the discharging direction of the flushing wastewater is switched, the fifth control valve 15 is conducted, and the flushing wastewater is discharged into the brine tank 16 through the brine tank water replenishing water path 40. After the salt absorption regeneration step is finished, high-concentration brine still remains in the resin tank, and therefore, the brine needs to be washed away to supply water for subsequent water-using equipment (such as a water purifier, a water heater, a boiler and the like), the traditional mode is that washing wastewater is directly discharged, and taking a 1T specification water softener as an example, the washing step consumes about 15L of water, so that water resource waste is caused.

It can be known through the analysis of the washing waste water that the calcium magnesium ion content that is displaced out in the waste water of initial emission is higher, along with the continuation of washing process, most calcium magnesium ion is along with washing waste water discharge, a small part of calcium magnesium ion is absorbed by soft water resin, therefore the calcium magnesium ion content in the resin tank can be reduced to 0, and salt water concentration is still higher, the water consumption of washing that generally sets up is with can all wash away salt water as the standard, prevent that salt water from getting into rear end water equipment and corroding metal inner bag, pipeline, pipe connector etc. through retrieving this part of washing waste water (hardness is low and contain salt) to the salt water tank in this scheme, because this part of washing waste water contains salt, can reduce the salt consumption of the supplementary salt of salt water tank. And the traditional step of replenishing water to the brine tank is avoided, and the purpose of saving water is achieved.

In the present embodiment, the direction of the water flow is forward from the first port 101 to the second port 102 and reverse from the second port 102 to the first port 101, and preferably, the first port 101 is located at the top of the resin tank 10 and the second port 102 is located at the bottom of the resin tank 10. Therefore, the resin tank is positively washed in the positive washing step, namely water is injected into the top of the resin tank, water flows wash and soften the resin from top to bottom, and washing wastewater is discharged from the bottom of the resin tank. The water flow compresses the resin from top to bottom, and the technical effect of the method is that the speed of the water flow passing through the resin is slowed down in the soft water process, so that the time for softening the water by the resin is more sufficient.

In addition, in the salt absorption regeneration step, brine is injected from the bottom of the resin tank 10, and the water flow passes through the softened resin in a reverse direction from bottom to top. Because the soft water resin at the bottom of the resin tank 10 is always contacted with the newly converged salt water, the part of the soft water resin can reach a high regeneration degree, when the soft water is normally prepared, the raw water passes through the soft water resin from top to bottom, and finally the outlet water is contacted with the soft water resin with the high regeneration degree at the bottom, so that the quality of the outlet water is ensured. And the salt water is controlled to reversely pass through the softened resin from bottom to top to disperse the resin, so that the salt water can fully act with the soft water resin on the upper layer in the flowing process of the salt water, and the regeneration of the soft water resin on the upper layer is realized.

Because the water flow is from top to bottom in the process of preparing soft water, the soft water resin is pressed firmly by the long-term action of the water pressure, in order to further strengthen the full contact between the salt water and the soft water resin in the step of absorbing salt and regenerating, the water softener waterway system of the embodiment also comprises a backwashing waterway 50 which is sequentially connected with the water inlet pipe 17, the second port 102, the first port 101 and the waste water pipe 18, and the circulation state of the backwashing waterway 50 is controlled by the control module. The method also comprises a back washing step before the salt absorption regeneration step, wherein the water injection direction of the back washing is to inject water from the second port 102 (namely the bottom) of the resin tank containing the soft water resin, and the water flow reversely washes the soft resin from bottom to top. Raw water entering from the water inlet pipe 17 is injected in the step, and the main function of the step is to disperse the resin, so that the preparation is made for the next salt absorption regeneration, and the salt water can be in more sufficient contact with the resin.

In this embodiment, the first control valve 11 is preferably a two-position three-way electromagnetic valve, the water inlet end 110 of the first control valve is connected to the water inlet pipe 17, one water outlet end 111 of the first control valve is connected to the salt absorption regeneration water path 20, and the other water outlet end 112 of the first control valve is connected to the back washing water path 50. Because the backwashing step and the salt absorption regeneration step cannot be performed simultaneously, that is, the backwashing water path 50 and the salt absorption regeneration water path 20 cannot be conducted simultaneously, the first control valve 11 is a two-position three-way electromagnetic valve in the present embodiment, and can respectively control the circulation states of the backwashing water path 50, the salt absorption regeneration water path 20 and the water inlet pipe 17. The water path of the system is simplified, the use of control valves is saved, and of course, an electromagnetic valve may be respectively arranged in the backwashing water path 50 and the salt absorption regeneration water path 20, and the control logic may also be realized.

In the forward-flushing water path 30, the second control valve 12 is used to control the flow state between the second port 102 and the waste water pipe 18, and at the same time, the flow state between the first port 101 and the waste water pipe 18 in the back-flushing water path 50 needs to be controlled at the same time, because both are connected to the waste water pipe 18 and the forward-flushing water path 30 and the back-flushing water path 50 are not conducted at the same time, in this embodiment, it is preferable that the second control valve 12 is a two-position three-way solenoid valve, one of the water inlet ends 120 of the second control valve 12 is connected to the first port 101, the other water inlet end 122 is connected to the second port 102, and the water outlet end 121 of the second control valve 12 is connected to the waste. The on-off state of two water paths can be controlled simultaneously through one two-position three-way electromagnetic valve, the using quantity of electric control devices is saved, and the complexity of control logic is reduced.

Be provided with ejector 19 in inhaling salt regeneration water route 20, the end that absorbs water of ejector 19 inserts to brine tank 16 in, when inhaling salt regeneration water route 20 circulation, during water entering in the inlet tube 17 inhales salt regeneration water route 20, ejector 19 can inhale salt water in brine tank 16 to inhaling salt regeneration water route 20 according to the venturi principle, and then along with intaking and pour into in resin tank 10.

Since the salt absorption regeneration water path 20 is also connected to the second port 102, in order to prevent the recovery waste water from entering the salt absorption regeneration water path 20 when the recovery path 202 is running, the salt absorption regeneration water path 20 is provided with a third electromagnetic valve 13 for controlling the running state of the water path.

In the waste water pipe 18, a salinity detection element 21 is provided, which is used to detect the hardness of the rinsing waste water, in particular, by detecting the TDS value (abbreviation of total dissolved solids, i.e. inorganic salts and organic substances dissolved in the water), the conductivity, etc. in the water, and corresponding sensors are provided according to the detection principle.

Be provided with filtering component 22 in inlet tube 17 for the impurity of filtering falling into the aquatic prevents to block up ejector 22, guarantees ejector 22 reliable operation. Furthermore, purified soft water may also be provided for back-end water appliances.

The water softener waterway system of the present embodiment further includes a soft water waterway, which is sequentially connected to the water inlet pipe 17, the first port 101, the second port 102 and the water outlet pipe 60. When soft water is produced, the salt absorption regeneration water path 20 and the positive flushing water path 30 are both disconnected, raw water in the water inlet pipe 17 enters the resin tank 10 from the first port 101, is discharged from the second port 102 after being softened, enters the water using equipment 62 at the rear end through the water outlet pipe 60, a fourth electromagnetic valve 14 for controlling the circulation state of the section of the pipe is arranged between the water inlet pipe 17 and the first port 101, the fourth electromagnetic valve 14 needs to be opened in the soft water producing step and the flushing step, and the fourth electromagnetic valve 14 needs to be disconnected in other steps, so that unnecessary water circulation is prevented from being formed.

The water outlet pipe 60 is provided with a one-way valve 61, and the one-way valve 61 is used for conducting the water outlet pipe 60 to the water using equipment 62 at the later stage in a one-way mode, so that when the water using equipment 62 is a water heater, the water stored in the water heater can be prevented from flowing back to the water channel system of the water softener.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.