Soft water control valve for enabling regenerated liquid to stay for long time

Abstract

The utility model discloses a soft water control valve for enabling regenerated liquid to stay for a long time, which comprises a shell internally provided with a cavity. A water inlet channel, a water outlet channel, a wastewater discharge channel, a mixed water channel, a reverse mixed water channel, a siphon water taking channel, a salt absorption channel, and a side wall channel and a central channel which are communicated with the liquid storage tank are respectively formed in the liquid storage tank; the blocking assembly comprises a grating assembly and a piston assembly, the grating assembly is arranged in the cavity and forms sealing with the cavity, the piston assembly is arranged in the grating assembly and forms sealing with the grating assembly, and the outside of the grating assembly divides the cavity of the control valve into a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel and a sixth flow channel which are mutually sealed. The soft water control valve not only can realize the functions of liquid treatment, dirt washing, positive flow recovery / reverse flow recovery, medium compaction and salt box liquid supplementation, but also can enable regenerated liquid to stay for a long time so as to improve the resin exchange efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of water softeners, and in particular relates to a soft water control valve capable of allowing regeneration liquid to stay for a long time. Background Art

[0002] A water softener uses ion exchange resin to remove calcium and magnesium ions from water, reducing water hardness. This softens water, removing calcium and magnesium ions and making it softer. This significantly improves the quality of water used in daily life, such as washing, bathing, and shampooing. Water softeners can also be used in industrial applications, such as boilers and air conditioners, which require softened water. A water softener is a highly efficient and environmentally friendly device that improves the quality of domestic water and is an indispensable component of industrial use.

[0003] The softener's purified water is hard water that enters the resin tank through a control valve. Water treated with the exchange agent flows through the bottom separator, upward through the riser pipe, and out through the control valve. Backwashing the softener involves hard water entering the control valve, flowing downward from the center riser pipe to the bottom diverter, backwashing the exchange agent from the bottom up, and then being discharged through the control valve drain port. Regeneration of the softener involves hard water entering the control valve, entering the water injector from the top, and then drawing the reducing agent from the salt tank through a jet process. The water carrying the reducing agent flows downward through the exchange agent layer, into the diverter and riser pipe, and then out through the control valve drain port.

[0004] The core component of a water softener is the control valve. Its functions include switching between different water paths, including water purification, backwashing, salt absorption and regeneration, forward washing, and water injection. To address this issue, a new control valve was designed that allows for convenient operation, flexibly switching the softener's operating modes between purification, backwashing, salt absorption, and water injection, while also enabling extended retention of the regeneration fluid. Utility Model Content

[0005] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a soft water control valve, through the operation of which not only the functions of liquid treatment, dirt flushing, forward flow recovery / backflow recovery, medium compaction and salt tank replenishment can be realized, but also the regeneration liquid can be kept for a long time.

[0006] Technical solution: The utility model is a soft water control valve for allowing the regeneration liquid to stay for a long time. The control valve includes:

[0007] The shell has a cavity for accommodating the plugging assembly, and is provided with a water inlet channel, a water outlet channel, a wastewater discharge channel, a mixed water channel, a demixed water channel, a siphon water intake channel, a salt absorption channel, and a side wall channel and a central channel connected to the liquid storage tank;

[0008] The blocking assembly includes a grille assembly disposed in the cavity and forming a seal therewith, and a piston assembly disposed in the grille assembly and forming a seal therewith, wherein the exterior of the grille assembly divides the cavity of the control valve into a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, and a sixth flow channel that are sealed from each other;

[0009] The water inlet channel is connected to the fifth flow channel, the water outlet channel is connected to the first flow channel, the wastewater discharge channel is connected to the third flow channel, the central channel is connected to the second flow channel, the side wall channel is connected to the fourth flow channel, the salt absorption channel is connected to the sixth flow channel, the siphon water intake channel is connected to the water outlet channel, the mixed water channel is connected to the fourth flow channel, and the anti-mixed water channel is connected to the second flow channel;

[0010] The piston assembly includes a first piston body and a second piston body connected to each other. The first piston body is provided with a through hole, which penetrates the first piston body in the axial direction. The first piston body is provided with a first groove, and the second piston body is provided with several second grooves. Through the cooperation of the first groove and the second groove with the grid assembly, the soft water control valve is located in different functional positions to achieve different functions of the water softener.

[0011] Furthermore, the soft water control valve also includes a water channel on-off assembly connected to the water outlet pipe of the housing. The water channel assembly includes a first valve body having a cavity structure and a water inlet and a water outlet located on the left and right sides of the cavity, respectively; a first grille assembly disposed within the first valve body; a first piston assembly disposed within the first grille assembly and cooperating therewith to connect or disconnect the water inlet and the water outlet through its movement; and a first drive assembly that drives the movement of the first piston assembly. Furthermore, the first grille assembly includes a first top cover and a plurality of water-passing brackets connected to the first top cover; the first piston assembly includes a third piston body and a helical worm connected to the third piston body; the first drive assembly includes a first motor having a first gear, a first piston gear meshing with the first gear, and the first piston gear is cooperating with the helical worm.

[0012] Furthermore, the grid assembly of the soft water control valve includes a first grid assembly arranged between the first piston body and the cavity of the shell and a second grid assembly arranged between the second piston body and the cavity of the shell; the piston assembly also includes a spiral worm with one end connected to the first piston body.

[0013] Furthermore, the first grille assembly of the soft water control valve includes a first internal water flow bracket and a top cover, and several first water flow brackets respectively arranged between the first internal water flow bracket and the top cover; the second grille assembly includes a second water flow bracket connected to the first internal water flow bracket, and a second internal water flow bracket connected to the second water flow bracket.

[0014] Furthermore, the soft water control valve also includes a drive assembly that drives the piston assembly to open and close different flow channels. The drive assembly includes a motor with gears, a plurality of gear sets meshing with the motor gears and with each other, and a piston gear meshing with the last gear set and disposed on the worm gear. Preferably, each of the plurality of gear sets includes a coaxially arranged large gear and a small gear, with the large gear of the first gear set meshing with the motor gear, and the small gear of the first gear set meshing with the large gear of the next gear set.

[0015] Furthermore, the driving assembly of the soft water control valve is fixed to the bottom plate through a bracket, and the bottom plate is connected and fixed to the top cover of the first grid assembly.

[0016] Furthermore, the soft water control valve also includes a protective shell that is snapped onto the bottom plate. The bracket is provided with a PCBA board for regulating the operation of the drive component and the water channel on-off component, and the protective shell is provided with an operation display that matches the PCBA board.

[0017] Furthermore, the soft water control valve also includes a siphon assembly arranged on the shell, and the shell of the siphon assembly is equipped with a siphon, a water intake pipe, a mixing water pipe and a reverse mixing water pipe. The shell is provided with a salt absorption port, the siphon is inserted into the shell, the water intake pipe is connected to the siphon water intake channel, the mixing water pipe is connected to the mixing water channel, and the reverse mixing water pipe is connected to the reverse mixing water channel.

[0018] Beneficial effects: Compared with the prior art, the advantages of the present invention are: the soft water control valve can not only realize the functions of liquid treatment, dirt flushing, forward flow recovery / backflow recovery, medium compaction and salt box replenishment through the operation of the control valve, but also can make the regeneration liquid stay for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional diagram of the soft water control valve (including the water channel on-off component) of the present utility model;

[0020] Figure 2 This is an exploded view of the soft water control valve of the utility model (excluding the water channel on-off component);

[0021] Figure 3 This is a schematic diagram of the structure of the soft water control valve housing of the utility model Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the structure of the soft water control valve housing of the utility model Figure 2 ;

[0023] Figure 5 This is a structural diagram of the grille assembly of the utility model;

[0024] Figure 6 This is a schematic diagram of the water circuit structure of a water softener formed by combining a soft water control valve with a liquid storage tank according to the present invention;

[0025] Figure 7 The structure of the piston assembly of the utility model is shown as follows Figure 1 ;

[0026] Figure 8 The structure of the piston assembly of the utility model is shown as follows Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the structure of the drive assembly of the utility model;

[0028] Figure 10 This is a schematic diagram of the structure of the water channel on-off component of the soft water control valve of the utility model;

[0029] Figure 11 This is a schematic diagram of the coordination of the grid assembly, piston assembly and drive assembly of the water channel on-off assembly of the present invention;

[0030] Figure 12 This is a structural diagram of the siphon assembly of the soft water control valve of the present utility model;

[0031] Figure 13 This is a schematic diagram of the liquid treatment water circuit structure of a water softener formed by combining a soft water control valve with a liquid storage tank according to the present invention;

[0032] Figure 14 This is a schematic diagram of the structure of the dirty flushing water circuit of the water softener formed by the soft water control valve and the liquid storage tank of the utility model;

[0033] Figure 15 This is a schematic diagram of the medium compaction water circuit structure of the water softener formed by the soft water control valve and the liquid storage tank of the utility model;

[0034] Figure 16 This is a schematic diagram of the structure of the positive flow recovery water path of the water softener formed by the soft water control valve and the liquid storage tank of the utility model;

[0035] Figure 17 This is a schematic diagram of the backflow recovery water path structure of the water softener formed by the soft water control valve and the liquid storage tank of the utility model;

[0036] Figure 18 This is a schematic diagram of the structure of the brine tank replenishment water circuit of a water softener formed by the soft water control valve of the utility model in conjunction with the liquid storage tank. DETAILED DESCRIPTION

[0037] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings.

[0038] The soft water control valve of this utility model can absorb the recovery liquid in the salt tank after it is completely absorbed when the forward flow is restored or the reverse flow is restored. The soft water control valve can first shut off the water channel on-off component through the setting of the PCBA board, and then adjust the soft water control valve to the liquid treatment working state. At this time, the regeneration recovery liquid and the treatment medium are in contact for a long time, that is, the regeneration liquid can stay for a long time, so that the hardness particles adsorbed on the medium can fully drag the medium, greatly improving the treatment capacity of the medium. Specifically, Figure 1 and Figure 2 As shown, the soft water control valve includes a housing 1, which has a cavity 2 therein for accommodating a blocking assembly consisting of a grille assembly and a piston assembly; a drive assembly that drives the piston assembly to cooperate with the grille assembly to form different passages and achieve different operating states; and a PCBA board 47 for controlling the start and stop of the drive assembly. The drive assembly and PCBA board 47 are mounted on a base plate 45, which is connected to the grille assembly. A protective shell 46 covers the base plate 45, which is also equipped with an operating display 48 connected to the PCBA board 47. The operating display 48 is an outward-moving, handheld module that can be directly hung on the protective shell 46. The exterior of the grille assembly forms a sealed connection with the cavity of the housing 1, and the piston assembly is mounted within the grille assembly and forms a sealed connection with the interior of the grille assembly.

[0039] Among them, Figure 3 and Figure 4 As shown, the shell 1 is provided with a water inlet channel 3, a water outlet channel 4, a wastewater discharge channel 5, a mixed water channel 6, a reverse mixed water channel 7, a siphon water intake channel 8, a salt absorption channel 9, and a side wall channel 11 and a central channel 12 connected to the liquid storage tank 10. The grid assembly consists of two parts, such as Figure 5 As shown, there are a first grille assembly 32 and a second grille assembly 33, respectively. The first grille assembly 32 is composed of a top cover, four first water overflow brackets 35 connected to the top cover in sequence, and a first internal water overflow bracket 34 connected to the last first water overflow bracket 35 connected in sequence. The second grille assembly 33 is composed of a second water overflow bracket 36 connected to the first internal water overflow bracket 34 and a second internal water overflow bracket 37 connected to the second water overflow bracket 36. That is, the four first water overflow brackets 35 and the first internal water overflow bracket 34 of the first grille assembly 32 and the cavity 2 of the shell 1, and the second water overflow bracket 36 of the second grille assembly 33 and the cavity 2 of the shell 1 form a first flow channel 13, a second flow channel 14, a third flow channel 15, a fourth flow channel 16, a fifth flow channel 17 and a sixth flow channel 18 that are sealed from each other. Figure 6As shown, the water inlet channel 3 provided on the housing 1 is connected to the fifth flow channel 17, the water outlet channel 4 is connected to the first flow channel 13, the wastewater discharge channel 5 is connected to the third flow channel 15, the central channel 12 is connected to the second flow channel 14, the side wall channel 11 is connected to the fourth flow channel 16, the salt absorption channel 9 is connected to the sixth flow channel 18, the siphon water intake channel 8 is connected to the water outlet channel 4, the mixed water channel 6 is connected to the fourth flow channel 16, and the reverse mixed water channel 7 is connected to the second flow channel 14. Based on the arrangement of the water channels, the piston assembly and the grid assembly can be coordinated to realize the water channel opening and closing in different working states, realizing the functions of liquid treatment, dirt flushing, forward flow recovery / reverse flow recovery, medium compaction and salt tank rehydration, and can also keep the regenerated liquid for a long time. For the forward flow recovery / reverse flow recovery function, the piston assembly can be configured accordingly according to actual conditions.

[0040] like Figure 7 As shown, the piston assembly cooperates with the grille assembly, which also includes a first piston body 19 and a second piston body 20. The first grille assembly 32 is disposed between the first piston body 19 and the cavity 2 of the housing 1, and the second grille assembly 33 is disposed between the second piston body 20 and the cavity 2 of the housing 1. The first piston body 19 is provided with a through hole that extends axially through the first piston body 19. The first piston body 19 is provided with a first groove 50. One end of the first piston body 19 is connected to the helical worm 38, and the other end of the first piston body 19 is connected to the second piston body. The second piston body 20 is provided with a plurality of second grooves 21. The first grooves 50 and the second grooves 21 cooperate with the grille assembly to position the soft water control valve in different functional positions, thereby achieving different functions of the water softener. The number of the second grooves 21 can be one or two. The difference between the two is that when the second piston body 20 with one first groove 21 is used to cooperate with the first piston body 19, the positive flow recovery working state of the water softener can be achieved; when the second piston body 20 with one or two first grooves 21 is used to cooperate with the first piston body 19, as shown in FIG. Figure 8 As shown, the backflow recovery working state of the water softener can be achieved accordingly.

[0041] The movement of the piston assembly is achieved by a drive assembly located on the bottom plate 45 connected to the top cover 49 of the grid assembly. Figure 9As shown, the drive assembly includes a motor 40 with a gear 39, several stages of gears meshing with the gear 39 of the motor 40 and with each other, and a piston gear 41 meshing with the final stage of the gears and mounted on the worm gear 38. Preferably, there are three stages, with the large gear 42 of the first gear set meshing with the gear 39 of the motor 40, the small gear 43 of the first gear set meshing with the large gear 42 of the second gear set, the small gear 43 of the second gear set meshing with the large gear 42 of the third gear set, and the small gear 43 of the third gear set meshing with the piston gear 41. In other words, the meshing rotation of the gears achieves forward and backward linear motion of the worm gear 38, driving the forward and backward motion of the first and second piston bodies 19, 20. This, in turn, positions the first groove 50 on the first piston body 19 and the second groove 21 on the second piston body 20 at different positions in the grille assembly, thereby opening and closing different passages.

[0042] In addition, the soft water control valve of the present invention also includes a water on-off component connected to the water outlet pipe of the housing 1, such as Figure 10 and Figure 11 As shown, the water channel assembly includes a water channel on-off assembly connected to the water outlet pipe of the housing 1. The water channel assembly includes a first valve body 24 with a cavity structure and a water inlet 22 and a water outlet 23 located on the left and right sides of the cavity, respectively; a first grille assembly disposed within the first valve body 24; a first piston assembly disposed within the first grille assembly and cooperating with the first grille assembly to connect or disconnect the water inlet 22 and the water outlet 23 through its movement; and a first drive assembly that drives the movement of the first piston assembly. The first grille assembly includes a first top cover 25 and a plurality of water-passing brackets 26 connected to the first top cover 25; the first piston assembly includes a third piston body 27 and a helical worm gear 38 connected to the third piston body 27. The first drive assembly includes a first motor 29 with a first gear 28, a first piston gear 30 meshing with the first gear 28, and the first piston gear 30 is arranged in conjunction with the helical worm gear 38. That is, the third piston body 27 is driven to move forward and backward by the first motor 29 to realize the connection and disconnection between the water inlet 22 and the water outlet 23, thereby realizing the closing or opening of the final water outlet channel.

[0043] In addition to the above, the present invention also includes a siphon assembly located at the rear of the shell, which is connected to the salt tank. The siphon assembly is connected to the rear of the shell 1, and the siphon assembly can suck in the regeneration recovery fluid and can also close the regeneration recovery fluid port. Figure 12As shown, the water released by the siphon assembly can dissolve the salt in the salt tank. The siphon assembly's housing 58 houses a siphon 53, a water intake pipe 54, a mixing water pipe 55, and a reverse mixing water pipe 56. The siphon 53 is inserted into the housing 1. A cover 57 is provided at the rear of the siphon assembly, which covers the siphon 53 within the housing 1 and allows for quick removal. A salt intake port 51 is provided on the housing 58. The water intake pipe 54 is connected to the siphon 53's water intake channel 8, the mixing water pipe 55 is connected to the mixing water channel 6, and the reverse mixing water pipe 56 is connected to the reverse mixing water channel 7.

[0044] like Figure 13 As shown, the soft water control valve of the present invention realizes liquid treatment (i.e., when in the soft water working state), the movement of the first piston body 19 and the second piston body 20 enables the first groove 50 of the first piston body 19 to connect the first flow channel 13 and the second flow channel 14, and the second piston body 20 is connected to the fifth flow channel 17. Then, the raw water enters the fifth flow channel 17 through the water inlet channel 3, enters the liquid storage tank 10 along the side wall channel 11, and is purified, and then flows out through the central channel 12, the second flow channel 14 and the first flow channel 13 in sequence, thereby achieving the softening effect of the raw water.

[0045] like Figure 14 As shown, the soft water control valve of the present invention realizes dirty flushing (i.e., in the backwash working state), the movement of the first piston body 19 and the second piston body 20 enables the first groove 50 of the first piston body 10 to connect the third flow channel 15 and the fourth flow channel 16, and the first piston body 19 connects the second flow channel 14 with the first flow channel 13, and then after the raw water enters the water inlet channel 3, it can flow out from the water outlet channel 4 through the through hole of the first piston body 19, or it can reversely enter the central channel 12 through the second flow channel 14, and the flushed water flows out through the side wall channel 11 and the wastewater discharge channel 5 of the third flow channel 15.

[0046] like Figure 15 As shown, the soft water control valve of the present invention realizes medium compaction (i.e., when in the positive flushing working state), the movement of the first piston body 10 and the second piston body 20 enables the first groove 50 of the first piston body 19 to connect the second flow channel 14 and the third flow channel 15, and the second piston body 20 connects the fifth flow channel 17 with the side wall channel 11, so that the raw water can flow out from the water outlet channel 4 through the through hole of the first piston body 19, or flow in from the fifth channel 17 through the side wall channel 11, and flow out through the central channel 12 and the wastewater discharge channel 5.

[0047] like Figure 16As shown, the soft water control valve of the present invention realizes positive flow recovery (i.e., in the downstream salt absorption working state), the movement of the first piston body 19 and the second piston body 20 causes the first groove 50 of the first piston body 19 to connect the second flow channel 14 and the third flow channel 15, and the second groove 21 of the second piston body 20 to connect the sixth flow channel 18 with the salt absorption channel 9, that is, the raw water passes through the water inlet channel 3 to reach the fifth flow channel 17, and from the center of the first piston body 19 to the water outlet channel 4. The driving water passes through the siphon water intake channel 8 from the water outlet channel 4 to the siphon, and the salt liquid is sucked from the salt tank through the salt absorption port 51, and mixed in the siphon through the salt absorption channel 9. The mixed salt liquid enters the side wall channel 11 from the mixed water channel 6, and then goes down to restore the medium function. The exchanged waste liquid enters the third flow channel 15 from the central channel 12 and flows out from the wastewater discharge channel 5.

[0048] like Figure 17 As shown, the soft water control valve of the present invention realizes backflow recovery (i.e., in the backflow salt absorption working state), the movement of the first piston body 19 and the second piston body 20 causes the first groove 50 of the first piston body 19 to connect the third flow channel 15 and the fourth flow channel 16, and the second groove 21 of the second piston body 20 to connect the sixth flow channel 18 with the salt absorption channel 9, that is, the raw water passes through the water inlet channel 3 to reach the fifth flow channel 17, and from the center of the first piston body 19 to the water outlet channel 4. The driving water passes from the water outlet channel 4 through the siphon water intake channel 8 to the siphon, and the salt liquid is sucked from the salt tank through the salt absorption port 51, and mixed in the siphon through the salt absorption channel 9. The mixed salt liquid enters the central channel 12 through the anti-mixing water channel 7 and the second flow channel 14, and is exchanged from the bottom of the medium through the central channel 12. The waste liquid generated flows out from the side wall channel 11 through the third channel 15 and the wastewater discharge channel 5.

[0049] When the utility model adopts downstream recovery or reverse flow recovery to absorb the regeneration liquid, the control valve is turned to the soft water working state, and the water channel on-off component is closed at the same time, so that the water outlet, the salt intake port and the sewage outlet are all closed, thereby enabling the regeneration liquid to stay in the liquid storage tank for a long time.

[0050] like Figure 18 As shown, when the soft water control valve of the present invention realizes the replenishment of the salt tank, the movement of the first piston body 19 and the second piston body 20 causes the first groove 50 of the first piston body 19 to connect the first flow channel 13 with the second flow channel 14, and the second groove 21 of the second piston body 20 is connected to the salt intake port 51. The through hole of the first piston body 19 is closed, and the second piston body 20 connects the fifth flow channel 17 with the side wall channel 11, that is, the raw water enters from the water inlet channel 3 through the fifth flow channel 17 and the side wall channel 11 and flows out through the first flow channel 13, and the raw water is driven into the salt tank through the salt intake port 51 to replenish the water source.

[0051] That is, the soft water control valve can not only realize the functions of liquid treatment, dirt flushing, forward flow recovery / backflow recovery, medium compaction and salt tank replenishment through the operation of the control valve, but also enable the regeneration liquid to stay for a long time.

Claims

1. A soft water control valve for allowing the regeneration liquid to stay for a long time, characterized in that: The control valve includes a valve body and a water channel on-off assembly used in conjunction with the valve body. The water channel on-off assembly is located on the water outlet pipe and can shut off the water outlet channel so that the control valve does not discharge untreated raw water during the regeneration process. At the same time, after absorbing the regeneration liquid, the control valve is driven to the working position so that the regeneration liquid stays in the liquid storage tank for a long time, and the regeneration liquid and the medium in the liquid storage tank are fully exchanged. The valve body includes: A housing (1) is provided with a cavity (2) for accommodating a plugging assembly, and is provided with a water inlet channel (3), a water outlet channel (4), a wastewater discharge channel (5), a mixed water channel (6), a reverse mixed water channel (7), a siphon water intake channel (8), a salt absorption channel (9), and a side wall channel (11) and a central channel (12) connected to a liquid storage tank (10); A blocking assembly comprises a grid assembly disposed in the cavity (2) and forming a seal therewith, and a piston assembly disposed in the grid assembly and forming a seal therewith, wherein the exterior of the grid assembly divides the cavity (2) of the control valve into a first flow channel (13), a second flow channel (14), a third flow channel (15), a fourth flow channel (16), a fifth flow channel (17), and a sixth flow channel (18) which are sealed from each other; The water inlet channel (3) is connected to the fifth flow channel (17), the water outlet channel (4) is connected to the first flow channel (13), the wastewater discharge channel (5) is connected to the third flow channel (15), the central channel (12) is connected to the second flow channel (14), the side wall channel (11) is connected to the fourth flow channel (16), the salt absorption channel (9) is connected to the sixth flow channel (18), the siphon water intake channel (8) is connected to the water outlet channel (4), the mixed water channel (6) is connected to the fourth flow channel (16), and the anti-mixed water channel (7) is connected to the second flow channel (14); The piston assembly comprises a first piston body (19) and a second piston body (20) connected to each other. The first piston body (19) is provided with a through hole, which penetrates the first piston body (19) in an axial direction. The first piston body (19) is provided with a first groove (50), and the second piston body (20) is provided with a plurality of second grooves (21). The first grooves (50) and the second grooves (21) cooperate with the grid assembly so that the soft water control valve is located in different functional positions, thereby achieving different functions of the water softener.

2. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 1, characterized in that: The control valve further comprises a waterway on-off assembly connected to the water outlet pipe of the housing (1), the waterway on-off assembly comprising a first valve body (24) provided with a cavity structure and provided with a water inlet (22) and a water outlet (23) on the left and right sides of the cavity, respectively; a first grid assembly provided in the first valve body (24); a first piston assembly provided in the first grid assembly and cooperating with the first grid assembly to realize connection or isolation of the water inlet (22) and the water outlet (23) through its movement; and a first drive assembly driving the movement of the first piston assembly.

3. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 2, characterized in that: The first grille assembly comprises a first top cover (25) and a plurality of water-passing brackets (26) connected to the first top cover (25); the first piston assembly comprises a third piston body (27) and a helical worm (38) connected to the third piston body (27); the first drive assembly comprises a first motor (29) provided with a first gear (28), a first piston gear (30) meshing with the first gear (28), and the first piston gear (30) is arranged in cooperation with the helical worm (38).

4. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 1, characterized in that: The grid assembly comprises a first grid assembly (32) provided between the first piston body (19) and the cavity (2) of the housing (1), and a second grid assembly (33) provided between the second piston body (20) and the cavity (2) of the housing (1); the piston assembly further comprises a spiral worm (38) one end of which is connected to the first piston body (19).

5. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 4, characterized in that: The first grille assembly (32) comprises a first internal water-flow bracket (34) and a top cover (49), and a plurality of first water-flow brackets (35) respectively arranged between the first internal water-flow bracket (34) and the top cover (49); the second grille assembly (33) comprises a second water-flow bracket (36) connected to the first internal water-flow bracket (34), and a second internal water-flow bracket (37) connected to the second water-flow bracket (36).

6. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 4, characterized in that: The soft water control valve further includes a drive assembly for driving the piston assembly to move and realize the opening and closing of different flow channels. The drive assembly includes a motor (40) with a gear (39), a plurality of gear sets meshing with the gear (39) of the motor (40) and meshing with each other, and a piston gear (41) meshing with the last gear set and provided on the spiral worm (38).

7. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 6, characterized in that: The plurality of gear sets each include a large gear (42) and a small gear (43) coaxially arranged; wherein the large gear (42) of the first gear set among the plurality of gear sets is meshed with the gear (39) of the motor (40), and the small gear (43) of the first gear set is meshed with the large gear (42) of the next gear set.

8. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 6, characterized in that: The driving assembly is fixed to a bottom plate (45) via a bracket (44), and the bottom plate (45) is connected and fixed to a top cover (49) of the first grille assembly (32).

9. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 8, characterized in that: The soft water control valve further comprises a protective shell (46) fastened to the bottom plate (45); a PCBA board (47) for regulating the operation of the drive assembly and the waterway on-off assembly is provided on the bracket (44); and an operation display (48) matching the PCBA board (47) is provided on the protective shell (46).

10. The soft water control valve for allowing the regeneration liquid to stay for a long time according to claim 1, characterized in that: The soft water control valve further comprises a siphon assembly (52) arranged on the shell, wherein the shell (58) of the siphon assembly is provided with a siphon (53), a water intake pipe (54), a mixing water pipe (55) and a reverse mixing water pipe (56), wherein the shell (58) is provided with a salt intake port (51), the siphon (53) is inserted into the shell (1), the water intake pipe (54) is connected to the siphon water intake channel (8), the mixing water pipe (55) is connected to the mixing water channel (6), and the reverse mixing water pipe (56) is connected to the reverse mixing water channel (7).

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