Water treatment control valve

Abstract

The utility model provides a water treatment control valve which comprises at least two piston units which are driven to move through a driving structure. A plurality of sealing plugs are arranged on the piston unit, and every two adjacent sealing plugs are used for separating a water path; the piston unit is located in a cavity of the cavity; according to the water path switching device, a partition structure is adopted, water path switching between an operation mode and a regeneration mode is achieved by moving the plungers in the multiple cavities, the operation distance of the plungers is shortened, the operation efficiency is improved, and the operation cost is reduced. Requirements on manufacturing precision and motion control precision are reduced, the fault occurrence rate is reduced, and the operation reliability is improved.

Description

Technical Field

[0001] The utility model relates to the field of soft water preparation, in particular to a water treatment control valve. Background Art

[0002] Water softeners generally use ion exchange resin technology to remove calcium and magnesium ions from water, thereby reducing the formation of scale and improving the water experience for bathing and washing. After a period of use, the ion exchange resin is saturated with calcium and magnesium ions and needs to be regenerated with a concentrated sodium chloride solution to restore performance. Therefore, water softeners usually need to switch back and forth between normal operating mode and regeneration mode, and the regeneration mode usually includes multiple procedures such as water injection, salt dissolution, salt absorption, forward washing or backwashing, and multiple water circuits need to be switched. Among them, the soft water valve is the core component of the water softener. Through the soft water valve, multiple water circuits can be switched to achieve different functional modes. However, the traditional soft water valve uses a single plunger to move in multiple positions in the cavity to achieve the switching of all water circuits in normal operating mode and regeneration mode. The plunger has a long running distance and many stop positions, and the manufacturing precision requirements and motion control precision requirements are high. It is easy to fail and water cross-linking occurs. During regeneration, because it is a separate cavity, salt water and sewage will be mixed into the normal water pipe, resulting in a poor customer experience and affecting the user's home wading equipment. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a water treatment control valve, which adopts a partition structure and uses multiple plungers to move in multiple cavities to realize the water path switching in the operation and regeneration modes, aiming to shorten the plunger running distance, reduce the requirements for manufacturing precision and motion control precision, reduce the failure rate, and improve the operation reliability. At the same time, it solves the problem of too many components and complex assembly in existing products; on the basis of meeting the normal operation of the water treatment system, the structure can also realize the bypass function by equipping a three-way ball valve or a solenoid valve, and realize the water path closing by equipping a two-way solenoid valve and an electric ball valve, which is safer and more reliable.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A water treatment control valve, comprising:

[0006] At least two piston units, the piston units are driven to move by a driving structure;

[0007] The piston unit is provided with a plurality of sealing plugs, and two adjacent sealing plugs are used to separate the waterway;

[0008] A cavity, wherein the piston unit is located in a hollow space of the cavity;

[0009] A number of water inlet holes and water outlet holes are provided on the cavity, and the water inlet holes and water outlet holes are communicated with the water channels blocked by the sealing plugs.

[0010] As a further solution of the present utility model, it includes three piston units. Corresponding sealing plugs are arranged on the piston units according to the water channel direction, and the distance between adjacent sealing plugs is adjustable.

[0011] As a further solution of the present utility model, the three piston units are respectively a first piston unit, a second piston unit and a third piston unit; the positions for driving the piston units to move include an operating position, a flushing position, a water injection position, and a regeneration position.

[0012] As a further solution of the present utility model, when the three piston units are in the operating position, water enters the cavity from the first water inlet hole, forms a passage through the second piston unit and exits the cavity from the first water outlet hole on the other side of the cavity, enters the resin layer in the resin tank through the connecting pipe for softening, comes out from the bottom of the resin through the central pipe, enters the cavity through the connecting pipe from the second water inlet hole, forms a passage through the second piston unit and enters the second water outlet hole on one side, and then comes out through the second water outlet hole and is connected to a water pipe to provide softened water.

[0013] As a further solution of the present utility model, when the three piston units are in the flushing position, a three-way ball valve is connected to the second water outlet hole, one end is a water pipe for providing softened water, and the other end is a sewage discharge port pipe. The positions of the piston units in the flushing position are the same as those in the operating position.

[0014] As a further solution of the present utility model, when the three piston units are in the water injection position, water enters the interior of the cavity from the third water inlet hole, forms a passage through the third piston unit and exits the cavity from the third water outlet hole on the other side of the cavity, enters the ejector channel, enters the brine tank through the jet holes to dissolve the brine, and the ejector is installed on the side of the cavity.

[0015] As a further solution of the present utility model, when the three piston units are in the regeneration position, water enters the interior of the cavity from the third water inlet hole, forms a passage through the third piston unit and exits the cavity from the third water outlet hole on the other side of the cavity, enters the ejector channel, forms a negative pressure through the Venturi principle, sucks the concentrated brine in the brine tank through the jet holes and mixes it, enters the cavity through the ejector assembly holes and comes out from the fourth water outlet hole through the first piston unit, enters the central pipe through the connecting pipe and comes out at the bottom, passes through the resin layer for regeneration, and at the same time the brine enters the cavity through the connecting pipe and the fourth water inlet hole, and is discharged from the fifth water outlet hole on the other side through the passage formed by the first piston unit.

[0016] As a further solution of the present utility model, when in the water injection position, if water enters the cavity through the orifice of the injector assembly, at this time, two adjacent sealing plugs in the first piston unit block the flow of water.

[0017] As a further solution of the present utility model, one end of the three piston units is fixed by a connecting plate, and the driving structure changes the position of the piston unit by driving the movement of the connecting plate.

[0018] As a further solution of the present utility model, the three piston units are sealed by a cavity, a sealing ring is arranged on the sealing plug, the connecting plate is connected with an adapter plate, the driving structure drives the piston unit to move through the adapter plate, the adapter plate is provided with a cylindrical structure with a thread, the driving structure is provided with a screw rod, and the movement of the adapter plate is driven by the screw rod. The driving structure is a driving motor.

[0019] The present utility model has the following beneficial effects:

[0020] A water treatment control valve of the present utility model adopts a partitioned structure, and multiple plungers move in multiple cavities to realize the water path switching in the operation and regeneration modes, aiming to shorten the running distance of the plungers, reduce the requirements for manufacturing precision and motion control precision, reduce the failure rate, and improve the operation reliability. At the same time, it solves the problems of too many components and complex assembly in the existing products. Further, the combination of multiple plungers and multiple cavities of the soft water valve can realize the necessary functions (operation, salt absorption, water replenishment and salt dissolution, backwashing, and normal washing) of softening with at least 3 positions, so as to simplify the structure of the valve body and valve core assembly, shorten the running distance of the plungers, reduce the staying positions, and further reduce the requirements for manufacturing precision and motion control precision, and reduce the failure rate. And through structural partitioning, the water paths are separately arranged, so that the soft water valve has great improvements in aspects such as production and assembly, cost control, maintainability, and reliability.

[0021] To more clearly illustrate the structural features and functions of the present utility model, the present utility model will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the piston unit mentioned in the present utility model;

[0023] Figure 2 It is a schematic exploded view of a water treatment control valve mentioned in the present utility model;

[0024] Figure 3 It is a partial exploded view of a water treatment control valve mentioned in the present utility model.

[0025] Figure 4This is a schematic diagram of the overall structure of a water treatment control valve mentioned in the utility model.

[0026] Figure 5 It is a schematic diagram of the local structure of the cavity mentioned in the utility model.

[0027] Figure 6 This is a schematic diagram of the direction of a waterway mentioned in the utility model, wherein the arrow indicates the direction of water.

[0028] Figure 7 This is a schematic diagram of the water flow direction in the operating position mentioned in the utility model.

[0029] Figure 8 This is a schematic diagram of the water flow direction at the water injection position mentioned in the utility model.

[0030] Figure 9 This is a schematic diagram of the water flow direction in the regeneration position mentioned in the utility model.

[0031] Figure 10 This is a schematic diagram of the installation position of the ejector mentioned in the utility model.

[0032] Figure 11 It is a schematic diagram of the utility model with a three-way ball valve installed. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described application is only a part of the embodiments of the present invention, rather than all of the embodiments.

[0034] The utility model solves the problem that the plunger of the traditional soft water valve has many stop positions, needs to be provided with more sealing rings and a longer moving stroke, resulting in greater resistance. During the movement of the plunger, multiple sealing rings of different sizes and specifications are repeatedly rubbed for a long time, which makes the sealing ring wear probability high, resulting in a high risk of water leakage in the soft water valve. The plunger of the soft water valve of the utility model has fewer stop positions, a shorter stroke, and the number and specifications of the required sealing rings are uniform. The operation process is simple and the friction time is short, so that the wear probability of the sealing ring can be reduced. At the same time, multiple sealing rings can be placed in the key part, which can reduce the risk of water leakage in the soft water valve; and the traditional soft water valve adopts a single column to move in the valve cavity for a long stroke, and the water path in the valve cavity is complex, and there will be water-crossing pipelines. When regenerating and cleaning, if water is used at the same time, salt water and sewage will be mixed into the normal water pipeline, and the operation reliability is low. The utility model places different plungers in different cavities, reduces the complexity of the pipeline, and at the same time does not affect each other. When cleaning and regenerating, water will not cause water-crossing and other problems.

[0035] Reference Figures 1 - 11As shown, a water treatment control valve of the utility model comprises:

[0036] At least two piston units 1, driven by a driving structure 2 to move the piston units;

[0037] A plurality of sealing plugs 3 are provided on the piston unit 1, and two adjacent sealing plugs are used to separate the waterway;

[0038] Cavity 5, the piston unit is located in the cavity 7 of the cavity;

[0039] The cavity 5 is provided with a plurality of water inlet holes and water outlet holes, and the water inlet holes and the water outlet holes are connected with the water path separated by the sealing plug;

[0040] In the present invention, by changing the traditional single piston mode to multiple piston units, a plurality of sealing plugs 3 are provided on the piston unit 1, and then the piston unit is driven to move by the driving structure 2, it is possible to realize the switching of multiple waterways in the preparation process of soft water, and there is no influence between them, so as to ensure the accuracy of the preparation process of soft water; more specifically, the water inlet hole enters the waterway separated by the sealing plug, and then flows out through the water outlet hole, and more specifically, since multiple piston units 1 and multiple water inlet holes and water outlet holes are provided, different functions can be realized on different piston units, so as to realize the use of a partition structure, and use multiple plungers to move in multiple cavities to realize the waterway switching in the operation and regeneration modes, aiming to shorten the plunger running distance, reduce the requirements for manufacturing accuracy and motion control accuracy, reduce the failure rate, and improve the operation reliability. At the same time, it solves the problem of too many components and complex assembly in existing products.

[0041] As a further improvement, three piston units 1 are included. Corresponding sealing plugs 3 are arranged on the piston units 1 according to the direction of the waterway, and the spacing between adjacent sealing plugs 3 is adjustable. The adjustability means that the spacing is arranged according to the needs. For example, different spacings are set according to the requirements of the waterway during injection molding.

[0042] As a further improvement, the three piston units 1 are respectively a first piston unit 101, a second piston unit 102 and a third piston unit 103. Further preferably, the first piston unit 101 is used as an example for description. Figure 1As shown, there are 7 sealing plugs 3 provided on the first piston unit 101, and a water passage is formed between adjacent sealing plugs 3. In some other cases, to prevent water leakage, several more sealing plugs 3 can be provided. For example, four sealing plugs 3 form a water passage structure. Water leakage can also be prevented by providing two sealing rings on one sealing plug 3. Since the present utility model adopts multiple piston units 1, the positions where the soft water valve plunger stays are few, the stroke is short, the quantity specifications of the required sealing rings are unified, the operation process is simple and the friction time is short, thus the wear probability of the sealing rings can be reduced. At the same time, multiple sealing rings can be placed at key parts, which can reduce the water leakage risk of the soft water valve; while the traditional soft water valve uses a single column to move in a long stroke in the valve cavity, the water passage in the valve cavity is complex, and there will be water-crossing pipelines. During regeneration, if water is used simultaneously during cleaning, brine and sewage will be mixed into the normal water pipelines, and the operation reliability is low. However, the present utility model places different plungers in different cavities, reducing the complexity of the pipelines and achieving non-interference with each other. During cleaning and regeneration, water will not cause water-crossing and other situations.

[0043] As a further improvement, the positions for driving the piston unit to move include the running position, the flushing position, the water injection position, and the regeneration position.

[0044] Refer to Figure 7 As shown, when the three piston units are in the running position, water enters the cavity from the first water inlet hole 1002, forms a passage through the second piston unit and exits the cavity from the first water outlet hole 52 on the other side of the cavity, enters the resin layer in the resin tank through the connecting pipe for softening, comes out from the center pipe at the bottom of the resin, enters the cavity through the connecting pipe from the second water inlet hole 60, then forms a passage through the second piston unit and enters the second water outlet hole 20 on one side, and then comes out through the second water outlet hole 20 and is connected to a water pipe to provide soft water. This position can also be defined as the starting position or the origin position of the motor drive. In addition, it should be noted that the positions of the water inlet hole and the water outlet hole can be adjusted as needed, and the positions of the water inlet hole and the water outlet hole at this position are both connected to form a water passage structure with the sealing plug 3 in the second piston unit, but it does not exclude being connected to form a water passage structure with the sealing plug 3 in other piston units, that is, this solution is the optimal connection solution. For example, it can also be connected to form a water passage structure with the sealing plug 3 in the first piston unit.

[0045] Refer to Figure 11As shown, when the three piston units are in the normal flushing position, by connecting a three-way ball valve 14 to the second water outlet hole, one end is for the soft water pipeline, and the other end is for the sewage outlet pipeline. The positions of the piston units in the normal flushing position are the same as those in the operating position. That is to say, like in the operating position, there is a three-way ball valve at the water outlet. By relying on the switching function of the three-way ball valve, if it is switched to the sewage outlet, it is in the normal flushing state at this time, and vice versa is the operating state. The design of this structure can greatly reduce the structure of the traditional single valve, and has higher stability through the three-way ball valve, will not have the problem of water leakage, and is convenient for subsequent function expansion.

[0046] Referring to Figure 8 As shown, when the three piston units are in the water injection position, that is, the salt dissolution position, from the normal flushing position, the three piston units are driven to move in the opposite direction of the motor. Further preferably, a light sensor can be used to detect the moving position or a servo motor can be used to drive. The water enters the cavity through the third water inlet hole 1001, enters the third water outlet hole 72 on the other side of the cavity through the passage formed by the third piston unit, and then enters the injector 15 channel, and enters the salt water tank through the jet hole 73 to dissolve the salt water. The injector is installed on the side of the cavity. Referring to Figure 8 the third piston unit 103 in Figure 7 and the third piston unit 103 in Figure 7 , it can be seen that the third water inlet hole 1001 is above the third piston unit 103, the third water outlet hole 72 is below the third piston unit 103, and referring to Figure 8 , at this time, the third water outlet hole 72 is between the two sealing plugs 3, forming a seal for the third water outlet hole 72; when the position moves to

[0047] Referring to Figure 9 As shown, when the three piston units are in the regeneration position or the slow flushing position, it should be noted that the present invention can achieve multiple functions at the same position. This position is from Figure 8The position moves in the opposite direction of the motor. Similarly, a light sensor can be used to collect the position. The water inlet enters the cavity through the third water inlet hole 1001, enters the third water outlet hole 72 on the other side of the cavity through the passage formed by the third piston unit 103, exits the cavity, enters the ejector channel, forms a negative pressure through the Venturi principle, sucks the concentrated brine in the brine tank from the jet hole 73 and mixes it, enters the cavity through the ejector assembly hole 71, and comes out through the first piston unit from the fourth water outlet hole 30, enters the central pipe through the connecting pipe, comes out after reaching the bottom, and is regenerated through the resin layer. At the same time, the brine enters the cavity through the connecting pipe and the fourth water inlet hole 51, and is discharged from the fifth water outlet hole 40 on the other side through the passage formed by the first piston unit. When the brine in the brine tank is washed out, the slow wash begins. Figure 8 and Figure 9 share the pipeline structure where the water inlet enters the cavity through the third water inlet hole 1001, enters the third water outlet hole 72 on the other side of the cavity through the passage formed by the third piston unit 103, and exits the cavity and enters the ejector channel. It should be noted here that with reference to Figure 1 shown, the interval between the two sealing plugs 3 on the third piston unit 103 is relatively long. That is, in different positions, it can meet the process of sharing the water inlet entering the cavity through the third water inlet hole 1001, entering the third water outlet hole 72 on the other side of the cavity through the passage formed by the third piston unit 103, and exiting the cavity, thus better reflecting the ingenuity of this design; as mentioned above, the interval between the two sealing plugs 3 can be adjusted to meet different requirements.

[0048] In the present utility model, with reference to Figures 7 - 9 shown, the positions of the water inlet hole and the water outlet hole are preferably set, but other position settings are not excluded. The core point is to be set according to the needs of the water channel. For example, if water enters from the first piston unit, water also needs to exit from the first piston unit and then to an external cycle, such as preparing soft water, dissolving salt, etc. After the external cycle, it enters other piston units, so as to achieve the stability of the fully automatic water treatment control valve of the present utility model, and there is no mutual interference between each water channel, higher precision, simpler operation, lower maintenance cost, better water channel sealing, and various external functions can be realized, such as adding detection instruments, etc.; the present utility model uses multiple plungers to move at multiple cavity positions to realize the water channel switching in the operation and regeneration modes to achieve corresponding functions (operation, water replenishment, salt suction, backwashing or normal washing), solving the problems of too long stroke, too many components, water leakage during cleaning, and complex assembly in the existing transmission mechanism, and at the same time can achieve precise positioning and large-scale automated production.

[0049] As described above, the utility model can achieve functions through the combination of multiple plungers in multiple separate cavities. To protect more plungers in more cavity combinations to form more functions, one driving device is used to drive the movement of multiple plungers in the cavities, and a jet ejector is integrated into the structure of the utility model to achieve water replenishment and salt absorption. The brine enters the resin layer separately through a separate brine water path, and a three-way valve is installed at the water inlet to achieve bypass, water source cut-off, and normal flushing functions. A two-way solenoid valve (electric ball valve) can also be installed at the water outlet to achieve automatic closing.

[0050] In the utility model, one end of three piston units 1 is fixed through a connecting plate 4, and the driving structure changes the position of the piston units by driving the movement of the connecting plate 4. Refer to Figure 3 As shown, one end of the three piston units 1 is fixed through the connecting plate 4, and then the driving structure changes the position of the piston units by driving the movement of the connecting plate 4.

[0051] It should be particularly noted that in the utility model, three piston units 1 are preferably used, but the cases of using four or more are not excluded.

[0052] As a further improvement, the three piston units 1 are sealed through a cavity 5, and a sealing ring 6 is provided on the sealing plug. Refer to Figure 4 、 Figure 5 As shown, during the use process, first, the three piston units 1 are installed in the housing, and the piston units are driven to move through the driving structure 2, so as to realize the switching of the piston positions. Specifically, as shown in Figure 5 As shown, three corresponding cavities 7 are provided in the housing, and the three piston units 1 are located in the three corresponding cavities 7. An opening structure 8 is provided on the side of the cavity 7, and a plurality of water inlet pipes and outlet pipes are provided on the outer shell. The installation method and quantity of the specific water inlet and outlet pipes are not limited in this application. Each opening structure 8 is correspondingly connected to a water inlet hole or a water outlet hole. At the same time, an opening structure 8 is also provided on the other side of the cavity 7. For example, the opening structure 8 is also connected to a water inlet pipe or a water outlet pipe. Taking this structure as an example, during the use process, water enters from the opening structure 8 on one side, then enters between the two sealing rings 6 of the piston unit 1, and then flows out from the opening structure 8 on the other side. For example, it can flow into the resin layer for softening, and after softening, it can enter another water channel composed of two sealing rings 6, and then flow out from the opening structure 8 on the other side of the water channel, and the preparation of soft water is completed. Refer to Figure 6 As shown, that is to say, in this position situation, it is the process of preparing soft water. If the three piston units 1 are moved to another position and a different water inlet is used, water flows into one of the water channels composed of two sealing rings 6 and then flows out to the salt water tank from the other side, completing the step of injection (salt melting), and the realization of other functions will not be elaborated here.

[0053] It should be noted that the plunger for water path switching provided by the present utility model is used to replace the traditional single piston mode, which can realize the switching of multiple water paths and has higher precision. That is, three piston units 1 can be provided, and each piston unit 1 is provided with a sealing plug. A water path is formed between adjacent sealing plugs. Then, by moving the piston unit 1, the water path structure can be changed. In the present utility model, water inlet pipes and outlet pipes can be connected according to needs. Refer to Figure 5 As shown, different opening structures 8 are provided on the housing, which can realize the access and outflow of different water paths. Further, the switching of different water paths is realized by moving the piston unit 1. For example, as described above, when water enters from one side, if the water outlet channel needs to be changed, only the piston unit 1 needs to be moved. Another example is that if there are two water outlets on the other side, the water inlet channel can be selected, specifically realized by two adjacent sealing plugs on the piston unit 1. For example, when a water outlet pipe connected to the water path formed by two adjacent sealing plugs, and then the piston unit 1 is moved, the water path entering the piston unit 1 can be changed, so that water can flow out from another opening structure 8. If other functions are to be realized, it is also achieved in the same way.

[0054] As a further improvement, a connecting plate is connected with an adapter plate 9, and the driving structure drives the piston unit to move through the adapter plate 9. Further preferably, the adapter plate is provided with a cylindrical structure 10 with threads, and the driving structure is provided with a screw rod 11, and the movement of the adapter plate is driven by the screw rod. The forward and reverse rotation of the driving structure (driving motor) is used to realize the forward and backward movement of the piston unit 1. Further, the position of the driving motor can be identified by a light sensor.

[0055] As a further improvement, corresponding sealing plugs are arranged on the piston unit according to the water path direction. The number of sealing plugs and compartments can be set according to needs, and the number of sealing rings of the sealing plugs can also be set. Compared with the single plunger of the traditional water softening valve that needs to stay at multiple positions, the combination of multiple plungers and multiple cavities of the water softening valve in this technical solution only needs at least 3 positions to realize the necessary functions (operation, salt absorption, make-up water salt dissolution, backwashing, and normal washing) of water softening, thus simplifying the structure of the valve body and valve core assembly, shortening the running distance of the plunger, reducing the staying positions, and further reducing the requirements for manufacturing precision and motion control precision, and reducing the failure rate. And through structural zoning, the water paths are separately arranged, which greatly improves the water softening valve in terms of production and assembly, cost control, maintainability and reliability.

[0056] The technical principle of the present utility model has been described in combination with specific embodiments, which are only the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any technical solution falling within the concept of the present utility model belongs to the protection scope of the present utility model. Those skilled in the art can readily conceive of other specific embodiments of the present utility model without creative efforts, and these embodiments will fall within the protection scope of the present utility model.

Claims

1. A water treatment control valve, characterized in that, include: Three piston units, which are driven to move by a driving structure; The piston unit is provided with a plurality of sealing plugs, and two adjacent sealing plugs are used to separate the waterway; The piston unit is located in the cavity of the cavity; a plurality of water inlet holes and water outlet holes are arranged on the cavity, and the water inlet holes and the water outlet holes are connected with the water path separated by the sealing plug. The corresponding sealing plugs are arranged on the piston unit according to the direction of the water path, and the spacing between adjacent sealing plugs is adjustable. The three piston units are a first piston unit, a second piston unit and a third piston unit which are arranged at intervals up and down.

2. The water treatment control valve according to claim 1, characterized in that; The positions for driving the piston unit to move include the operating position, the forward washing position, the water injection position, and the regeneration position.

3. A water treatment control valve according to claim 2, wherein, When the three piston units are in the operating position, water enters the cavity from the first water inlet hole, exits the cavity from the first water outlet hole on the other side of the cavity through the passage formed by the second piston unit, enters the resin layer in the resin tank through the connecting pipe to be softened, and reaches the bottom of the resin. It comes out from the central pipe, enters the cavity from the second water inlet hole through the connecting pipe, and then enters the second water outlet hole on one side through the passage formed by the second piston unit, and then comes out from the second water outlet hole and is connected to the water pipe to provide soft water.

4. The water treatment control valve according to claim 3, characterized in that, When the three piston units are in the forward wash position, a three-way ball valve is connected to the second water outlet, one end of which is a soft water pipeline and the other end is a sewage outlet pipeline, wherein the forward wash position is consistent with the piston unit position in the operating position.

5. The water treatment control valve according to claim 4, characterized in that, When the three piston units are in the water injection position, water enters the cavity from the third water inlet hole, passes through the passage formed by the third piston unit, enters the third water outlet hole on the other side of the cavity, exits the cavity, enters the ejector channel, and enters the brine tank from the ejector hole to dissolve the brine. The ejector is installed on the side of the cavity.

6. The water treatment control valve according to claim 5, wherein, When the three piston units are in the regeneration position, water enters the cavity from the third water inlet, enters the third water outlet on the other side of the cavity through the passage formed by the third piston unit, exits the cavity, enters the ejector channel, forms negative pressure through the Venturi principle, draws concentrated brine from the brine tank from the ejector hole and mixes it, enters the cavity through the ejector assembly hole, passes through the first piston unit and comes out from the fourth water outlet, enters the center pipe through the connecting pipe, comes out to the bottom, and regenerates through the resin layer. At the same time, brine enters the cavity through the connecting pipe and the fourth water inlet, and is discharged from the fifth water outlet on the other side through the passage formed by the first piston unit.

7. The water treatment control valve according to claim 6, characterized in that, When in the water injection position, if water enters the cavity through the ejector assembly hole, the two adjacent sealing plugs in the first piston unit block the flow of water.

8. A water treatment control valve according to claim 7, characterized in that, One ends of the three piston units are fixed by a connecting plate, and the driving structure changes the position of the piston unit by driving the movement of the connecting plate.

9. A water treatment control valve according to claim 8, characterized in that, The three piston units are sealed by a cavity, at least one sealing ring is arranged on the sealing plug, the connecting plate is connected to an adapter plate, the driving structure drives the piston unit to move through the adapter plate, the adapter plate is provided with a cylindrical structure with threads, the driving structure is provided with a screw, and the screw drives the adapter plate to move, and the driving structure is a driving motor.

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