Soft water control valve and control method thereof

Abstract

The invention discloses a soft water control valve and a control method thereof. A valve body shell of the soft water control valve is provided with a control valve water inlet, a control valve water outlet, a jet device water inlet, a jet device water outlet, a jet device water suction port, a salt suction port, a drain outlet, a resin barrel communicating port and a central pipe communicating port; the jet device is mounted outside a valve body through the jet device water inlet, the jet device water outlet and the jet device water suction port; a control cavity, a grid and a piston are arranged in the valve body shell, the control cavity comprises a water outlet grid area, a reverse flow salt suction grid area, a sewage discharge grid area, a forward flow salt suction grid area and a water inlet grid area, and a salt suction opening is communicated with a water suction opening of the jet device through a salt suction cavity. The salt suction pull rod moves in the salt suction cavity to control the connection and disconnection between the salt suction port and the water suction port of the jet device and the connection and disconnection between the salt suction port and the water inlet grid area; the working state of the soft water control valve comprises a countercurrent state and / or a downstream state. The soft water control valve is high in structural universality, and mode switching is easy and convenient; waterway layout is reasonable, and operation is stable and reliable.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology, specifically relating to a soft water control valve and its control method. Background Technology

[0002] Water softeners, widely used in industrial and household water treatment, rely heavily on their core component—the softening control valve—which directly determines the softening efficiency and operational reliability of the system. Water treated by a water softener is called soft water, while ordinary tap water is called hard water. Soft water has a significantly different taste and texture compared to hard water. The softening principle of a water softener involves removing calcium and magnesium ions from the water using methods such as ion exchange resins, thereby reducing water hardness and preventing scaling. However, as the softening process progresses, the resin gradually becomes saturated and ineffective. At this point, a regeneration process is needed to restore its exchange capacity. This is achieved by introducing sodium chloride solution (brine) from the brine tank into the resin tank through the softening control valve for regeneration.

[0003] To ensure the normal operation of the water softener, the water softening control valve also needs to switch water paths to clean the ion exchange resin, inject water into the brine tank to dissolve salt, and change the direction of inlet and outlet water flow to clean the filter media. All these water path switching functions are achieved through the water softening control valve.

[0004] Existing soft water control valves have limited functionality and complex structures. The forward and reverse flow valves are not interchangeable, requiring the replacement of the entire valve body to switch between different functions.

[0005] However, traditional soft water control valves typically employ a fixed water path design, resulting in limited functionality, complex structure, and often requiring different valve body structures to achieve co-current and counter-current operating modes. In practical applications, switching operating modes necessitates replacing the entire control valve body, increasing equipment costs and complicating installation and maintenance. Furthermore, key components such as ejectors in existing control valves are often built-in, making disassembly and assembly difficult and hindering routine cleaning and troubleshooting. Summary of the Invention

[0006] To overcome at least one of the defects described in the prior art, the present invention provides a soft water control valve with a reasonable structure, convenient mode switching, and simple maintenance, as well as a control method thereof.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a soft water control valve, including a valve body housing;

[0009] The valve body shell is provided with a control valve inlet, a control valve outlet, an ejector inlet, an ejector outlet, an ejector suction port, a brine suction port, a drain port, a resin tank connection port, and a central pipe connection port. The ejector is installed on the outside of the valve body through the ejector inlet, ejector outlet, and ejector suction port.

[0010] The valve body housing has a control chamber, which contains a grid and a piston. The control chamber is divided into an outlet grid area, a counter-current brine suction grid area, a sewage grid area, a co-current brine suction grid area, and an inlet grid area by the grid. The brine suction port is connected to the jet nozzle's water intake port through the brine suction chamber. A brine suction rod connected to the piston is installed in the brine suction chamber. The movement of the brine suction rod controls the opening and closing of the brine suction port and the jet nozzle's water intake port, as well as the opening and closing of the brine suction port and the inlet grid area.

[0011] The soft water control valve operates in two states: counter-current and / or co-current. In the counter-current state, the outlet grid area is connected to the control valve outlet and the ejector inlet; the counter-current brine absorption grid area is connected to the central pipe connection and the ejector outlet; the wastewater discharge grid area is connected to the wastewater outlet; the co-current brine absorption grid area is connected to the resin tank connection; and the inlet grid area is connected to the control valve inlet. In the co-current state, the outlet grid area is connected to the control valve outlet; the counter-current brine absorption grid area is connected to the central pipe connection; the wastewater discharge grid area is connected to the wastewater outlet; the co-current brine absorption grid area is connected to the resin tank connection and the ejector outlet; and the inlet grid area is connected to the control valve inlet and the ejector inlet.

[0012] Furthermore, the valve body shell is provided with two sets of ejector mounting ports, namely, a first set of ejector mounting ports consisting of a first ejector inlet, a first ejector outlet, and an ejector suction port, and a second set of ejector mounting ports consisting of a second ejector inlet, a second ejector outlet, and an ejector suction port; the first ejector inlet is connected to the outlet grid area, the first ejector outlet is connected to the countercurrent brine suction grid area, the second ejector inlet is connected to the inlet grid area, and the second ejector outlet is connected to the cocurrent brine suction grid area.

[0013] Furthermore, the grille is in close contact with the control cavity to form several connection positions, each connection position constituting an isolation position, namely the first isolation position, the second isolation position, the third isolation position, the fourth isolation position, the fifth isolation position, and the sixth isolation position. A water replenishment and salt absorption area is provided at the connection between the jet injector's water inlet and the salt absorption cavity, and the water replenishment and salt absorption area is provided with a seventh isolation position and an eighth isolation position.

[0014] Furthermore, the salt-absorbing rod is provided with a water-replenishing groove and a salt-absorbing groove. When the groove area of ​​the salt-absorbing rod is engaged with the seventh isolation position and the eighth isolation position, fluid flows through. When the non-groove area of ​​the salt-absorbing rod is engaged with the seventh isolation position and the eighth isolation position, fluid is blocked.

[0015] Furthermore, the piston includes large-diameter sections at both ends, namely a first large-diameter section and a second large-diameter section, as well as a small-diameter section between the two large-diameter sections. The piston blocks part of the grid area through the sidewalls of the large-diameter sections, and changes the blocked grid area through the movement of the piston.

[0016] Furthermore, the countercurrent state includes countercurrent working position, countercurrent water replenishment position, countercurrent brine absorption position, countercurrent backwashing position, and countercurrent forward washing position;

[0017] In the counter-current working position, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, and the seventh and eighth isolation positions abut against the non-groove area of ​​the salt suction rod.

[0018] When the counter-current water replenishment position is reached, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the salt suction groove of the salt suction rod, and the seventh isolation position abuts against the non-groove area of ​​the salt suction rod.

[0019] In the counter-current salt suction position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the third and fifth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the water replenishment groove of the salt suction rod, and the seventh isolation position abuts against the non-groove area of ​​the salt suction rod.

[0020] In the counter-current backwash position, the side wall of the first large diameter section of the piston abuts against the third isolation position, the side wall of the second large diameter section of the piston abuts against the fifth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod.

[0021] In the counter-current forward wash position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the fourth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod.

[0022] Furthermore, the co-current state includes co-current working position, co-current water replenishment position, co-current salt absorption position, co-current backwash position, and co-current forward wash position;

[0023] In the downstream working position, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, and the seventh and eighth isolation positions abut against the non-groove area of ​​the salt suction rod.

[0024] When the water is replenished in the downstream direction, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the salt suction groove of the salt suction rod, and the seventh isolation position is directly opposite the water replenishment groove of the salt suction rod.

[0025] When the salt is sucked in the downstream position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the fourth and fifth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the water replenishment groove of the salt sucking rod, and the seventh isolation position abuts against the non-groove area of ​​the salt sucking rod.

[0026] In the forward backwash position, the side wall of the first large diameter section of the piston abuts against the third isolation position, the side wall of the second large diameter section of the piston abuts against the fifth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod.

[0027] In the forward wash position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the fourth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod.

[0028] Furthermore, a resin tank connector is installed on the valve body shell. The resin tank connector has a through hole forming a resin tank connection port and a central tube connection port. The resin tank connection port is connected to the resin tank, and the central tube connection port is connected to the central tube inside the resin tank.

[0029] Furthermore, a transmission rod is installed at the other end of the piston relative to the salt-suction rod, and the transmission rod is connected to the transmission mechanism.

[0030] The present invention also provides a control method based on the above-mentioned soft water control valve, which involves setting two sets of ejector mounting ports on the valve body shell and switching between counter-current and co-current working modes by replacing the ejectors.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] (1) Strong structural versatility and easy mode switching: The soft water control valve of the present invention, through the optimized structural design, enables quick switching between counter-current and co-current working modes by replacing the ejector and connecting to different interfaces, without replacing the entire valve body, which greatly reduces manufacturing costs and user difficulty; The ejector adopts an external quick-release structure, which can be installed and disassembled as an independent component, making it easy to clean, replace and repair, and improving the maintainability and service life of the equipment;

[0033] (2) The water circuit layout is reasonable and the operation is stable and reliable: Through the precise cooperation between the grid and the piston, the control chamber is divided into multiple functional grid areas, and the water circuit is switched in an orderly manner under different working positions, ensuring that the softening, water replenishment, salt absorption, backwashing and forward washing processes are carried out smoothly, and the system operation is more stable; through the groove on the salt absorption rod and the isolation position, the water circuit opening and closing during the water replenishment and salt absorption processes are precisely controlled. Combined with the multi-position movement of the piston, the smooth transition of various working states is achieved, which is suitable for the needs of different water quality and usage scenarios.

[0034] (3) Strong compatibility and wide applicability: The control valve of the present invention can be used with resin tanks and salt tanks of different types and specifications, and has good system adaptability. It is suitable for various soft water use scenarios such as household, commercial and industrial use. Attached Figure Description

[0035] Figure 1 This is a diagram showing the external structure of the soft water control valve in counter-current mode;

[0036] Figure 2 This is a cross-sectional view of the soft water control valve in counter-current mode;

[0037] Figure 3 This is a schematic diagram of the salt suction lever in counter-current mode;

[0038] Figure 4 This is a structural diagram of the soft water control valve in the co-current mode;

[0039] Figure 5 This is a cross-sectional view of the soft water control valve in the co-current mode;

[0040] Figure 6 This is a schematic diagram of the salt suction rod in the co-current mode;

[0041] Figure 7 This is a diagram illustrating the structure and working principle of the working position in countercurrent mode;

[0042] Figure 8 This is a diagram illustrating the structure and working principle of the water replenishment point in counter-current mode;

[0043] Figure 9 This is a diagram illustrating the structure and working principle of the salt absorption position in countercurrent mode;

[0044] Figure 10 This is a diagram illustrating the structure and working principle of the backwash position in countercurrent mode;

[0045] Figure 11 This is a diagram illustrating the structure and working principle of the forward washing position in countercurrent mode;

[0046] Figure 12 This is a diagram illustrating the structure and working principle of the working position in the downstream mode;

[0047] Figure 13 This is a diagram illustrating the structure and working principle of the water replenishment location in the co-current mode;

[0048] Figure 14 This is a diagram illustrating the structure and working principle of the salt absorption point in co-current mode;

[0049] Figure 15 This is a diagram illustrating the structure and working principle of the backwash position in the co-current mode;

[0050] Figure 16 This is a diagram illustrating the structure and working principle of the forward washing position in the co-current mode.

[0051] In the diagram, the markings are: 1-Control valve housing; 2-Ejector; 201-First ejector inlet; 202-First ejector outlet; 211-Second ejector inlet; 212-Second ejector outlet; 203-Ejector suction port; 3-Control valve inlet; 4-Control valve outlet; 5-Resin tank connector; 501-Central pipe connection port; 502-Resin tank connection port; 6-Brine suction port; 7-Sewage discharge port; 8-Transmission mechanism; 9-Grate assembly; 901-Outlet grate area; 902-Countercurrent brine suction grate area; 903-Sewage discharge grate area; 904-Co-current brine suction grate area; 905-Inlet grate area; 9 06-Water replenishment and salt absorption area; 907-Salt absorption chamber; 911-First isolation position; 912-Second isolation position; 913-Third isolation position; 914-Fourth isolation position; 915-Fifth isolation position; 916-Sixth isolation position; 917-Seventh isolation position; 918-Eighth isolation position; 10-Transmission rod; 11-Piston; 1101-First large diameter section; 1102-Second large diameter section; 1103-Small diameter section; 12-Salt absorption rod; 1201-First water replenishment groove; 1202-First salt absorption groove; 1211-Second water replenishment groove; 1212-Second salt absorption groove; 13-Resin tank; 14-Central tube. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings.

[0053] This embodiment provides a soft water control valve, which has two switchable operating modes: counter-current and co-current. The structure of the soft water control valve in counter-current operating mode is as follows: Figure 1and 2 As shown, the structure of the soft water control valve in the downstream operating mode is as follows: Figure 4 and 5 As shown.

[0054] The soft water control valve of this embodiment mainly includes several interfaces disposed on the control valve housing 1 and a control cavity disposed inside the control valve housing 1.

[0055] The interfaces on the control valve housing 1 include a control valve inlet 3, a control valve outlet 4, an ejector inlet, an ejector outlet, an ejector suction port 203, a brine suction port 6, a drain port 7, a resin tank connection port 502, and a central pipe connection port 501. The ejector 2 is installed outside the valve body through the ejector inlet, ejector outlet, and ejector suction port 203. Specifically, a resin tank connector 5 is installed on the control valve housing 1. An axial through hole is formed in the middle of the resin tank connector 5 to form the central pipe connection port 501. An axial through hole is formed on one side of the central pipe connection port 501 to form the resin tank connection port 502. The resin tank connection port 502 connects to the resin tank 13, and the central pipe connection port 501 connects to the central pipe 14, which is located inside the resin tank 13.

[0056] The control chamber inside the control valve housing 1 is equipped with a grille assembly 9. The grille is tightly fitted to the inner wall of the control chamber. A piston 11 is installed inside the grille assembly 9. The control chamber is divided into an outlet grille area 901, a counter-current brine suction grille area 902, a sewage discharge grille area 903, a co-current brine suction grille area 904, and an inlet grille area 905 by the grille assembly 9. Specifically, the grille and the control chamber are in close contact to form several connection positions. In this embodiment, six connection positions are preferably provided, and each connection position constitutes an isolation position, namely, the first isolation position 911, the second isolation position 912, the third isolation position 913, the fourth isolation position 914, the fifth isolation position 915, and the sixth isolation position 916 (e.g., ...). Figure 7-16 As shown in the diagram, the area between the first isolation position 911 and the second isolation position 912 is the outlet grid area 901; the area between the second isolation position 912 and the third isolation position 913 is the countercurrent brine suction grid area 902; the area between the third isolation position 913 and the fourth isolation position 914 is the sewage discharge grid area 903; the area between the fourth isolation position 914 and the fifth isolation position 915 is the cocurrent brine suction grid area 904; and the area between the fifth isolation position 915 and the sixth isolation position 916 is the inlet grid area 905. A seventh isolation position 917 and an eighth isolation position 918 are provided at the connection between the jet injector suction port 203 and the brine suction chamber 907. The area between the seventh isolation position 917 and the eighth isolation position 918 is the water replenishment brine suction area 906.

[0057] The brine suction port 6 is connected to the jet injector suction port 203 via a brine suction chamber 907. A brine suction rod 12, connected to a piston 11, is fitted inside the brine suction chamber 907. A transmission rod 10 is installed at the other end of the piston 11 relative to the brine suction rod 12. The transmission rod 10 is connected to a transmission mechanism 8. The transmission mechanism 8 drives the brine suction rod 12 to move within the brine suction chamber 907 via the transmission rod 10, thereby controlling the connection and disconnection between the brine suction port 6 and the jet injector suction port 203, as well as between the brine suction port 6 and the water inlet grid area 905. Specifically, the brine suction rod 12 is provided with a water replenishment groove and a brine suction groove. When the grooved area of ​​the brine suction rod 12 engages with the seventh isolation position 917 and the eighth isolation position 918, it blocks the fluid. When the non-grooved area of ​​the brine suction rod 12 engages with the seventh isolation position 917 and the eighth isolation position 918, the fluid flows freely.

[0058] In the counter-current mode, the outlet grid area 901 is connected to the control valve outlet 4 and the ejector inlet; the counter-current brine suction grid area 902 is connected to the central pipe connection port 501 and the ejector outlet; the sewage discharge grid area 903 is connected to the sewage outlet 7; the co-current brine suction grid area 904 is connected to the resin tank connection port 502; and the inlet grid area 905 is connected to the control valve inlet 3. In the co-current mode, the outlet grid area 901 is connected to the control valve outlet 4; the counter-current brine suction grid area 902 is connected to the central pipe connection port 501; the sewage discharge grid area 903 is connected to the sewage outlet 7; the co-current brine suction grid area 904 is connected to the resin tank connection port 502 and the ejector outlet; and the inlet grid area 905 is connected to the control valve inlet 3 and the ejector inlet.

[0059] The structures of the ejector 2 and the brine suction rod 12 differ slightly between the two operating modes due to differences in interface positions and grid sealing requirements; that is, the length of the suction pipe of the ejector 2 is different (e.g., Figure 2 and Figure 5 As shown), the position of the water replenishment groove on the salt suction rod 12 is different (e.g. Figure 3 and Figure 6(As shown). Specifically, in counter-current operating mode, the ejector 2 is installed outside the valve body of the soft water control valve through the first ejector inlet 201, the first ejector outlet 202, and the ejector suction port 203. The first ejector inlet 202 is connected to the outlet grid area 901, and the first ejector outlet 202 is connected to the counter-current brine suction grid area 902. The corresponding brine suction rod 12 is provided with a first water replenishment groove 1201 and a first brine suction groove 120. 2; In the downstream working mode, the ejector 2 is installed on the outside of the soft water control valve body through the second ejector inlet 211, the second ejector outlet 212 and the ejector suction port 203. The second ejector inlet 211 is connected to the inlet grid area 905, and the second ejector outlet 212 is connected to the downstream salt suction grid area 904. The corresponding salt suction rod 12 is provided with a second water replenishment groove 1211 and a second salt suction groove 1212.

[0060] The preferred structure of piston 11 in this embodiment is as follows: Figure 7-16 As shown, it includes large-diameter sections located on both sides, namely the first large-diameter section 1101 and the second large-diameter section 1102, and a small-diameter section 1103 between the first large-diameter section 1101 and the second large-diameter section 1102. The sidewalls of the large-diameter sections block part of the grid area. The piston 11 is equipped with a transmission rod 10 at the other end relative to the salt suction rod 12. The transmission rod 10 is connected to the transmission mechanism 8. The transmission mechanism 8 drives the piston 11 to move within the grid assembly 9 through the transmission rod 10, thereby changing the blocked grid area.

[0061] The backflow operating states of the soft water control valve include backflow working position, backflow water supply position, backflow brine suction position, backflow backwash position, and backflow forward wash position; the structure and working principle of the soft water control valve in the backflow operating state are as follows: Figure 7-11 As shown.

[0062] The structure and working principle of the working position in reverse flow mode are as follows Figure 7 As shown:

[0063] Raw water enters the inlet grid area 905 between isolation positions 5 (915) and 6 (916) through the control valve inlet 3, and flows into the co-current brine suction grid between isolation positions 4 (914) and 5 (915). At this time, the side wall of piston 11 cooperates with isolation positions 1 (911), 3 (913), and 4 (914) to block the outlet grid area 901, the counter-current brine suction grid area 902, and the sewage discharge grid area 903. Raw water cannot flow into the sewage discharge grid area 903 between isolation positions 3 (913) and 4 (914). The resin can only enter the resin tank 13 through the resin tank connection port 502 on the side wall of the control valve, and then enter the counter-current salt absorption grid area 902 of isolation position two 912 and isolation position three 913 through the central pipe connection port 501. At this time, the raw water is softened into soft water. Since the sewage discharge grid area 903 between isolation position three 913 and isolation position four 914 is blocked, the soft water cannot enter the sewage discharge grid area 903. It can only enter the control valve outlet 4 through the water outlet grid area 901 between isolation position one 911 and isolation position two 912 to complete the softening. At the same time, soft water will enter the ejector 2 through the first ejector inlet 201 from the outlet grid area 901 and the countercurrent brine grid area 902, and enter the water replenishment and brine absorption area 906 between the isolation position seven 917 and the isolation position eight 918 through the ejector suction port 203. At this time, the isolation position seven 917 and the isolation position eight 918 cooperate with the brine suction rod 12 to block the water replenishment and brine absorption area 906, and the soft water cannot flow out of the water replenishment and brine absorption area 906.

[0064] The structure and working principle of the water replenishment position in counter-current mode are as follows Figure 8 As shown:

[0065] Piston 11 moves inward to a position where isolation position 8 918 is directly aligned with the first brine suction groove 1202 of brine suction rod 12, and isolation position 7 917 is misaligned with the first water replenishment groove 1201 of brine suction rod 12. This releases the blockage in water replenishment and brine suction area 906, creating a passage between ejector suction port 203 and brine suction port 6. Raw water enters the inlet grid area 905 between isolation position 5 915 and isolation position 6 916 through control valve inlet 3, and flows into the downstream brine suction grid area 904 between isolation position 4 914 and isolation position 5 915. At this time, the side wall of piston 11 cooperates with isolation positions 1 911, 3 913, and 4 914 to suction the outlet grid area 901 and the downstream brine suction area 904. When the salt grid area 902 and the sewage grid area 903 are blocked, the raw water cannot flow into the sewage grid area 903 between isolation position three 913 and isolation position four 914. Instead, it can only enter the resin tank 13 through the resin tank connection port 502 on the side wall of the control valve, and then enter the countercurrent salt absorption grid area 902 between isolation position two 912 and isolation position three 913 through the central pipe connection port 501. At this time, the raw water is softened into soft water. Since the sewage grid area 903 between isolation position three 913 and isolation position four 914 is blocked, the soft water cannot enter the sewage grid area 903. Instead, it can only enter the control valve outlet 4 through the water outlet grid area 901 between isolation position one 911 and isolation position two 912 to complete the softening. At the same time, soft water will enter the ejector 2 through the inlet of the first ejector 201 from the outlet grid area 901 and the countercurrent brine grid area 902, and enter the water replenishment and brine absorption area 906 between the isolation position seven 917 and the isolation position eight 918 through the ejector suction port 203. At this time, since the water replenishment and brine absorption area 906 is unblocked, the soft water flows out through the passage between the ejector suction port 203 and the brine absorption port 6, completing the water replenishment.

[0066] The structure and working principle of the salt absorption position in countercurrent mode are as follows: Figure 9 As shown:

[0067] Piston 11 moves to the right until its side wall engages with isolation positions 2 (912) and 3 (913) to seal the counter-current brine suction grid area 902, creating a cavity between isolation positions 2 (912) and 3 (913). Simultaneously, piston 11's side wall engages with isolation position 5 (915), isolation position 8 (918) aligns with the first water replenishment groove 1201 of the brine suction rod 12, and isolation position 7 (917) is misaligned with the groove of the brine suction rod 12, thus releasing the sealing of the water replenishment and brine suction area 906. A passage is formed between the jet injector inlet 203 and the brine inlet 6. Raw water enters the inlet grid area 905 through the control valve inlet 3. At this time, due to the cooperation between the side wall of the piston 11 and the isolation position 5 915, the raw water cannot enter the downstream brine grid area 904 between the isolation position 4 914 and the isolation position 5 915. As a result, the raw water cannot enter the resin tank 13. The raw water can only reach the outlet grid area 901 between the isolation position 1 911 and the isolation position 2 912 through the passage inside the piston and be discharged through the control valve outlet 4. Meanwhile, due to the cavity formed in the countercurrent brine absorption grid zone 902, the raw water reaching the outlet grid zone 901 enters the ejector 2 through the inlet 201 of the first ejector connected to the outlet grid zone 901. Due to the siphon effect, the brine is drawn from the brine absorption port 6 into the replenishment brine absorption zone 906 between isolation position seven 917 and isolation position eight 918, and then enters the cavity at the countercurrent brine absorption grid zone 902 between isolation position two 912 and isolation position three 913 through the outlet 202 of the first ejector. 902 enters the central pipe 14, reaches the bottom of the resin tank 13, and slowly rises from the bottom of the resin tank 13. It then enters the co-current brine absorption grid area 904 between isolation position four 914 and isolation position five 915. Since there is no cooperation between isolation position four 914 and the side wall of piston 11 at this time, the brine flows from the co-current brine absorption grid area 904 between isolation position four 914 and isolation position five 915 into the sludge discharge grid area 903 between isolation position three 913 and isolation position four 914, and is discharged from the sludge discharge port 7, completing the regeneration.

[0068] The structure and working principle of the backwash position in countercurrent mode are as follows: Figure 10 As shown:

[0069] Piston 11 moves to the right until isolation positions 2 (912) and 6 (916) are not in contact with the side wall of piston 11, while isolation positions 3 (913) and 5 (915) are in contact with the side wall of piston 11. At the same time, isolation positions 7 (917) and 8 (918) are misaligned with the groove of the salt suction rod 12. Raw water enters the inlet grid area 905 through the control valve inlet 3. At this time, because isolation position 5 (915) is in contact with the side wall of piston 11, raw water cannot enter the downstream salt suction grid area 904 between isolation positions 4 (914) and 5 (915). Therefore, raw water cannot enter the resin tank 13. Raw water can only reach the outlet grid area 901 between isolation positions 1 (911) and 2 (912) directly through the passage inside the piston and is discharged from the control valve outlet 4. Meanwhile, since there is no fit between isolation position 2 912 and the side wall of piston 11, the raw water enters the countercurrent brine suction grid area 902 between isolation position 2 912 and isolation position 3 913 through the outlet grid area 901, then enters the central pipe 14, and then enters the bottom of resin tank 13 through the central pipe 14. It then slowly flows upward from the bottom into the cocurrent brine suction grid area 904 between isolation position 4 914 and isolation position 5 915. Since there is no fit between isolation position 4 914 and the side wall of piston 11 at this time, the raw water enters the sewage discharge grid area 903 between isolation position 3 913 and isolation position 4 914, and is discharged from the sewage discharge port 7, completing the backwash.

[0070] The structure and working principle of the forward washing position in counter-current mode are as follows: Figure 11 As shown:

[0071] The piston moves to the right from its working state until isolation positions 1 (911), 3 (913), and 5 (915) are not in contact with the side wall of piston 11. Isolation positions 2 (912) and 4 (914) are in contact with the side wall of piston 11. At the same time, isolation positions 7 (917) and 8 (918) are misaligned with the groove of the brine suction rod 12. Raw water enters the inlet grid area 905 between isolation positions 5 (915) and 6 (916) through the control valve inlet 3. At this time, isolation position 5 (915) is not in contact with the side wall of piston 11, and raw water enters isolation position 4 (915). The raw water flows from the co-current brine suction grid zone 904 between isolation position 14 and isolation position 5 915 into the resin tank 13, then through the bottom of the resin tank 13 into the central pipe 14, and from the central pipe 14 into the counter-current brine suction grid zone 902 between isolation position 2 912 and isolation position 3 913. Since isolation position 3 913 does not fit with the side wall of piston 11, while isolation position 2 912 fits with the side wall of piston 11, the raw water flows from the counter-current brine suction grid zone 902 into the drain grid zone 903, and then is discharged from the drain outlet 7. At the same time, after the raw water enters the inlet grid zone 905, since isolation position 1 911 does not fit with the side wall of piston 11, a portion of the raw water will flow through the hollow water passage in the middle of piston 11 into the outlet grid zone 901 between isolation position 1 911 and isolation position 2 912, and be discharged from the control valve outlet 4.

[0072] The soft water control valve's downstream operating states include downstream working position, downstream water supply position, downstream brine intake position, downstream backwash position, and downstream forward wash position; the structure and working principle of the soft water control valve in the downstream operating state are as follows: Figure 12-16 As shown.

[0073] The structure and working principle of the working position in the downstream mode are as follows: Figure 12 As shown:

[0074] Raw water enters the inlet grid area 905 between isolation positions 5 (915) and 6 (916) through the control valve inlet 3, and flows into the downstream brine suction grid area 904 between isolation positions 4 (914) and 5 (915). Because isolation positions 1 (911), 3 (913), and 4 (914) are engaged with the side wall of piston 11 at this time, raw water cannot flow into the drain grid area 903 between isolation positions 3 (913) and 4 (914). Instead, it flows through the resin tank connection port 5 on the control valve side wall. 02 enters the resin tank 13, and then enters the counter-current brine absorption grid area 902 between isolation position two 912 and isolation position three 913 through the central pipe connection port 501. At this time, the raw water is softened into soft water. Because isolation position three 913 and isolation position four 914 are engaged with the side wall of piston 11, the soft water cannot enter the sewage grid area 903 between them. It can only enter the control valve outlet 4 through the water outlet grid area 901 between isolation position one 911 and isolation position two 912 to complete the softening. At the same time, the soft water will enter the ejector 2 through the second ejector inlet 211 from the water outlet grid area 901 and the counter-current brine absorption grid area 902, and then enter the water replenishment brine absorption area 906 between isolation position seven 917 and isolation position eight 918 from the ejector 2. At this time, isolation position seven 917 and isolation position eight 918 are misaligned with the groove of the brine absorption rod 12, and the soft water cannot flow out from the water replenishment brine absorption area 906.

[0075] The structure and working principle of the water replenishment point in the downstream mode are as follows: Figure 13 As shown:

[0076] Piston 11 moves to the right until isolation position 8 918 is directly opposite the second brine suction groove 1212 of brine suction rod 12, and isolation position 7 917 is directly opposite the second water replenishment groove 1211 of brine suction rod 12. This creates a passage between the inlet grid area 905 and the brine suction port 6. Raw water enters the inlet grid area 905 between isolation position 5 915 and isolation position 6 916 through the control valve inlet 3, and flows into the downstream brine suction grid area 904 between isolation position 4 914 and isolation position 5 915. Since isolation position 1 911, isolation position 3 913, and isolation position 4 914 are engaged with the side wall of piston 11 at this time, the raw water has no... The raw water flows into the drain grid area 903 between isolation positions 3 (913) and 4 (914). Water can only enter the resin tank 13 through the resin tank connection port 502 via the control valve sidewall, and then enters the counter-current brine absorption grid area 902 between isolation positions 2 (912) and 3 (913) via the central pipe connection port 501. At this point, the raw water is softened. Due to the cooperation between isolation positions 3 (913) and 4 (914) and the sidewall of piston 11, the soft water cannot enter the drain grid area 903. It can only enter the control valve outlet 4 via the outlet grid area 901 between isolation positions 1 (911) and 2 (912), completing the softening process. Simultaneously, because isolation position 8 (918) is directly opposite the second brine absorption groove 1212 of the brine absorption rod 12, and isolation position 7 (917) is directly opposite the second water replenishment groove 1211 of the brine absorption rod 12, the raw water flows through the water replenishment and brine absorption area 906 and is discharged from the brine absorption port 6, completing the water replenishment.

[0077] The structure and working principle of the salt absorption position in co-current mode are as follows: Figure 14 As shown:

[0078] Raw water enters the inlet grid area 905 between isolation positions 915 and 916 through the control valve inlet 3. Because isolation position 915 is fitted with the side wall of piston 11, the raw water cannot enter the downstream brine suction grid area 904. Instead, it enters the outlet grid area 901 between isolation positions 911 and 912 through the internal water passage of piston 11. At this time, piston 11 moves to the position where isolation position 918 is directly opposite the second water replenishment groove 1211 of the brine suction rod 12, and isolation position 917 is misaligned with the groove of the brine suction rod 12. This releases the blockage in the water replenishment and brine suction area 906, creating a passage between the ejector suction port 203 and the brine suction port 6. Furthermore, because isolation positions 912, 914, and 915 are fitted with the piston 11 at this time... With the sidewall in place, raw water enters the ejector 2 through the inlet 211 of the second ejector inlet 905 via the inlet grid area 905. It then enters the co-current brine absorption grid area 904 between the fourth isolation position 914 and the fifth isolation position 915 through the outlet 212 of the second ejector. At this time, the negative pressure formed by the ejector will draw brine from the brine inlet 6 through the ejector inlet 203 into the ejector 2. After mixing with the raw water, it enters the co-current brine absorption grid area 904 together. Then, it enters the resin tank 13 through the resin tank connection port 502 from the co-current brine absorption grid area 904, and enters the counter-current brine absorption grid area 902 between the second isolation position 912 and the third isolation position 913 through the central pipe connection port 501. Finally, it enters the sewage discharge grid area 903 from the counter-current brine absorption grid area 902 and is discharged from the sewage discharge port 7, completing the brine absorption process.

[0079] The structure and working principle of the backwash position in the co-current mode are as follows: Figure 15 As shown:

[0080] The piston moves to the right until isolation positions 2 (912) and 6 (916) are not engaged with the side wall of piston 11, while isolation positions 3 (913) and 5 (915) are engaged with the side wall of piston 11. Simultaneously, isolation positions 7 (917) and 8 (918) are misaligned with the groove of the brine suction rod 12. Raw water enters the inlet grid area 905 between isolation positions 5 (915) and 6 (916) through the control valve inlet 3. At this point, because isolation position 5 (915) is engaged with the side wall of piston 11, raw water cannot enter the downstream brine suction grid area 904 between isolation positions 4 (914) and 5 (915), and therefore cannot enter the resin tank 13. Instead, raw water can only reach isolation positions 1 (911) and 2 (916) directly through the internal passage of piston 11. The water in the outlet grid area 901 between 912 is discharged through the outlet port 4 of the control valve. At this time, since the isolation position 2 912 does not fit with the side wall of the piston 11, a portion of the raw water enters the countercurrent brine absorption grid area 902 between the isolation position 2 912 and the isolation position 3 913 through the outlet grid area 901. Then, it enters the central pipe 14 through the central pipe connection port 501, enters the bottom of the resin tank 13 through the central pipe 14, and then slowly flows upward from the bottom into the cocurrent brine absorption grid area 904 between the isolation position 4 914 and the isolation position 5 915. Since the isolation position 4 914 does not fit with the side wall of the piston 11 at this time, the raw water enters the sewage discharge grid area 903 between the isolation position 3 913 and the isolation position 4 914 and is discharged from the sewage discharge port 7, completing the backwash.

[0081] The structure and working principle of the forward wash position in the co-current mode are as follows: Figure 16 As shown:

[0082] Piston 11 moves to the right from its working state until isolation positions 1 (911), 3 (913), and 5 (915) are not in contact with the side wall of piston 11, while isolation positions 2 (912) and 4 (914) are in contact with the side wall of piston 11. Simultaneously, isolation positions 7 (917) and 8 (918) are misaligned with the groove of the brine suction rod 12. Raw water enters the inlet grid area 905 between isolation positions 5 (915) and 6 (916) through the control valve inlet 3. At this time, isolation position 5 (915) is not in contact with the side wall of piston 11, and raw water enters isolation position 4 (915). The co-current brine suction grid zone 904 between isolation position 914 and isolation position 5 915 leads to the resin tank 13. After flowing through the bottom of the resin tank 13, it enters the central pipe 14, and then enters the counter-current brine suction grid zone 902 between isolation position 2 912 and isolation position 3 913. Since isolation position 3 913 does not fit with the side wall of piston 11, while isolation position 2 912 fits with the side wall of piston 11, the raw water flows from the counter-current brine suction grid zone 902 into the drain grid zone 903, and then is discharged from the drain outlet 7. At the same time, after the raw water enters the inlet grid zone 905, since isolation position 1 911 does not fit with the side wall of piston 11, a portion of the raw water will flow through the hollow water passage in the middle of piston 11 into the outlet grid zone 901 between isolation position 1 911 and isolation position 2 912, and be discharged from the control valve outlet 4.

[0083] The above embodiments are merely typical implementations of the present invention and are not intended to limit the present invention. All equivalent substitutions or improvements made within the scope of the claims of the present invention are within the protection scope of the present invention.

Claims

1. A soft water control valve, characterized in that, Including the valve body housing; The valve body shell is provided with a control valve inlet, a control valve outlet, an ejector inlet, an ejector outlet, an ejector suction port, a brine suction port, a drain port, a resin tank connection port, and a central pipe connection port. The ejector is installed on the outside of the valve body through the ejector inlet, ejector outlet, and ejector suction port. The valve body housing has a control chamber, which contains a grid and a piston. The control chamber is divided into an outlet grid area, a counter-current brine suction grid area, a sewage grid area, a co-current brine suction grid area, and an inlet grid area by the grid. The brine suction port is connected to the jet nozzle's water intake port through the brine suction chamber. A brine suction rod connected to the piston is installed in the brine suction chamber. The movement of the brine suction rod controls the opening and closing of the brine suction port and the jet nozzle's water intake port, as well as the opening and closing of the brine suction port and the inlet grid area. The soft water control valve operates in two states: counter-current and / or co-current. In the counter-current state, the outlet grid area is connected to the control valve outlet and the ejector inlet; the counter-current brine absorption grid area is connected to the central pipe connection and the ejector outlet; the wastewater discharge grid area is connected to the wastewater outlet; the co-current brine absorption grid area is connected to the resin tank connection; and the inlet grid area is connected to the control valve inlet. In the co-current state, the outlet grid area is connected to the control valve outlet; the counter-current brine absorption grid area is connected to the central pipe connection; the wastewater discharge grid area is connected to the wastewater outlet; the co-current brine absorption grid area is connected to the resin tank connection and the ejector outlet; and the inlet grid area is connected to the control valve inlet and the ejector inlet.

2. The soft water control valve according to claim 1, characterized in that, The valve body shell is provided with two sets of ejector mounting ports, namely, the first set of ejector mounting ports consisting of a first ejector inlet, a first ejector outlet, and an ejector suction port, and the second set of ejector mounting ports consisting of a second ejector inlet, a second ejector outlet, and an ejector suction port; the first ejector inlet is connected to the outlet grid area, the first ejector outlet is connected to the countercurrent brine suction grid area, the second ejector inlet is connected to the inlet grid area, and the second ejector outlet is connected to the cocurrent brine suction grid area.

3. A soft water control valve according to claim 1, characterized in that, The grille is in close contact with the control cavity to form several connection positions, each connection position constituting an isolation position, namely the first isolation position, the second isolation position, the third isolation position, the fourth isolation position, the fifth isolation position, and the sixth isolation position. A water replenishment and salt absorption area is provided at the connection between the jet injector's water inlet and the salt absorption cavity. The water replenishment and salt absorption area is provided with a seventh isolation position and an eighth isolation position.

4. A soft water control valve according to claim 3, characterized in that, The salt-absorbing rod is provided with a water-replenishing groove and a salt-absorbing groove. When the groove area of ​​the salt-absorbing rod is engaged with the seventh and eighth isolation positions, fluid flows through. When the non-groove area of ​​the salt-absorbing rod is engaged with the seventh and eighth isolation positions, fluid is blocked.

5. A soft water control valve according to claim 4, characterized in that, The piston includes two large-diameter sections at both ends, namely the first large-diameter section and the second large-diameter section, and a small-diameter section between the two large-diameter sections. The piston blocks part of the grid area through the sidewall of the large-diameter section, and changes the blocked grid area by the movement of the piston.

6. A soft water control valve according to claim 5, characterized in that, The countercurrent state includes countercurrent working position, countercurrent water replenishment position, countercurrent salt absorption position, countercurrent backwash position, and countercurrent forward wash position; In the counter-current working position, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, and the seventh and eighth isolation positions abut against the non-groove area of ​​the salt suction rod. When the counter-current water replenishment position is reached, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the salt suction groove of the salt suction rod, and the seventh isolation position abuts against the non-groove area of ​​the salt suction rod. In the counter-current salt suction position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the third and fifth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the water replenishment groove of the salt suction rod, and the seventh isolation position abuts against the non-groove area of ​​the salt suction rod. In the counter-current backwash position, the side wall of the first large diameter section of the piston abuts against the third isolation position, the side wall of the second large diameter section of the piston abuts against the fifth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod. In the counter-current forward wash position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the fourth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod.

7. A soft water control valve according to claim 5, characterized in that, The co-current state includes co-current working position, co-current water replenishment position, co-current salt absorption position, co-current backwash position, and co-current forward wash position; In the downstream working position, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, and the seventh and eighth isolation positions abut against the non-groove area of ​​the salt suction rod. When the water is replenished in the downstream direction, the side wall of the first large diameter section of the piston abuts against the first isolation position, the side wall of the second large diameter section of the piston abuts against the third and fourth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the salt suction groove of the salt suction rod, and the seventh isolation position is directly opposite the water replenishment groove of the salt suction rod. When the salt is sucked in the downstream position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the fourth and fifth isolation positions, the side wall of the piston does not abut against other isolation positions, the eighth isolation position is directly opposite the water replenishment groove of the salt sucking rod, and the seventh isolation position abuts against the non-groove area of ​​the salt sucking rod. In the forward backwash position, the side wall of the first large diameter section of the piston abuts against the third isolation position, the side wall of the second large diameter section of the piston abuts against the fifth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod. In the forward wash position, the side wall of the first large diameter section of the piston abuts against the second isolation position, the side wall of the second large diameter section of the piston abuts against the fourth isolation position, the side wall of the piston does not abut against other isolation positions, and the eighth isolation position and the seventh isolation position both abut against the non-groove area of ​​the salt suction rod.

8. A soft water control valve according to claim 1, characterized in that, A resin tank connector is installed on the valve body shell. The resin tank connector has a through hole to form a resin tank connection port and a central tube connection port. The resin tank connection port is connected to the resin tank, and the central tube connection port is connected to the central tube inside the resin tank.

9. A soft water control valve according to claim 1, characterized in that, A transmission rod is installed at the other end of the piston relative to the salt suction rod, and the transmission rod is connected to the transmission mechanism.

10. A control method for a soft water control valve, characterized in that, Based on the soft water control valve according to any one of claims 1-9, two sets of ejector mounting ports are provided on the valve body shell, and the switching between counter-current working mode and co-current working mode is realized by replacing the ejector.

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