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

Abstract

The invention discloses a soft water control valve for enabling regenerated liquid to stay for a long time. The soft water control valve comprises a shell internally provided with a cavity used for containing a blocking assembly. 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 inner cavity, the piston assembly is arranged in the grating assembly and forms sealing with the grating assembly, and the outer portion of the grating assembly divides the inner 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 sealed with one another; the water inlet channel is communicated with the fifth flow channel, the water outlet channel is communicated with the first flow channel, the waste water discharge channel is communicated with the third flow channel, the center channel is communicated with the second flow channel, the side wall channel is communicated with the fourth flow channel, the salt absorption channel is communicated with the sixth flow channel, and the siphon water taking channel is communicated with the water outlet channel. The mixed water channel is connected with the fourth flow channel, and the reverse mixed water channel is communicated with the second flow channel. 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 invention 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 is a device that removes calcium and magnesium ions from water through ion exchange resin to reduce the hardness of water. A water softener has a softening effect on water quality, can remove calcium and magnesium ions from water, make the water quality softer, and has a good improvement effect on daily water use such as washing, bathing, and shampooing. At the same time, a water softener can also be used in the industrial field, such as boilers, air conditioners and other equipment that require the use of soft water. A water softener is an efficient and environmentally friendly device that can improve the quality of domestic water, and is also one of the indispensable equipment in the industrial field.

[0003] The purified water of the water softener is hard water that enters the resin tank through the control valve, and the water treated by the exchange agent passes through the bottom separator, flows upward through the lift pipe, and then flows out through the control valve. The backwash of the water softener is hard water that enters the control valve, flows from the center lift pipe from top to bottom to the bottom diverter, backwashes the exchange agent from bottom to top, and is discharged through the control valve drain port. The regeneration of the water softener is that after the hard water enters the control valve, it enters the water injector from the top, and then absorbs the reducing agent in the salt tank through the jet process. The water with the reducing agent flows downward through the exchange agent layer into the diverter and lift pipe, and then is discharged through the control valve drain port.

[0004] The core component of a water softener is a control valve. The functions of a control valve include switching between different water paths such as water purification, backwashing, salt absorption and regeneration, forward washing and water injection. Based on this, a new type of control valve is designed, which can be easily operated, flexibly switch the working state of the softener's purification, backwashing, salt absorption or water replenishment, and can also achieve long-term retention of the regeneration liquid. Summary of the invention

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

[0006] Technical solution: The present invention is a soft water control valve for allowing the regeneration liquid to stay for a long time, and the control valve comprises:

[0007] A shell body, in which a cavity for accommodating the plugging assembly is provided, on which a water inlet channel, a water outlet channel, a wastewater discharge channel, a mixed water channel, an anti-mixed 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 are respectively provided;

[0008] The plugging assembly includes a grille assembly disposed in the cavity and forming a seal with the inner cavity, and a piston assembly disposed in the grille assembly and forming a seal with the inner cavity, wherein the outer portion of the grille assembly divides the inner 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 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 an axial direction. The first piston body is provided with a first groove, and the second piston body is provided with a plurality of second grooves. The first groove and the second groove cooperate with the grid assembly so that 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 shell, the water channel assembly includes a first valve body provided with a cavity structure, and provided with a water inlet and a water outlet on the left and right sides of the cavity, a first grille assembly provided in the first valve body, a first piston assembly provided in the first grille assembly and cooperating with the first grille assembly to achieve the connection or isolation of the water inlet and the water outlet through its movement, and a first driving assembly driving the movement of the first piston assembly. Further, 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 spiral worm connected to the third piston body; the first driving assembly includes a first motor provided with a first gear, a first piston gear meshing with the first gear, and the first piston gear is arranged in cooperation with the spiral 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 inner cavity of the shell and a second grid assembly arranged between the second piston body and the inner 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 grid assembly of the soft water control valve includes a first internal water flow bracket and a top cover, and a plurality of first water flow brackets respectively arranged between the first internal water flow bracket and the top cover; the second grid 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 driving assembly for driving the piston assembly to move and realize the opening and closing of different flow channels, and the driving assembly includes a motor with gears, a plurality of gear sets meshing with the gears of the motor and meshing with each other, and a piston gear meshing with the last gear set and arranged on the spiral worm. Preferably, the plurality of gear sets include a coaxially arranged large gear and a small gear, the large gear of the first gear set meshing with the gear of the motor, 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 buckled on 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 effect: Compared with the prior art, the significant advantages of the present invention are: the soft water control valve can not only realize the functions of liquid treatment, dirty flushing, positive 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 It is a three-dimensional diagram of the soft water control valve (including the water passage on-off assembly) of the present invention;

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

[0021] Figure 3 The structure of the soft water control valve housing of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 4 The structure of the soft water control valve housing of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 5 It is a structural schematic diagram of the grille assembly of the present invention;

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

[0025] Figure 7 The structure of the piston assembly of the present invention is schematically shown in FIG. Figure 1 ;

[0026] Figure 8 The structure of the piston assembly of the present invention is shown in FIG. Figure 2 ;

[0027] Fig. 9 It is a schematic diagram of the structure of the driving assembly of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the waterway on-off assembly of the soft water control valve of the present invention;

[0029] Fig.11 It is a schematic diagram of the coordination of the grille assembly, the piston assembly and the drive assembly of the water channel on-off assembly of the present invention;

[0030] Fig.12 It is a structural schematic diagram of the siphon assembly of the soft water control valve of the present invention;

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

[0032] Fig.14 It is a schematic diagram of the structure of the dirty flushing water path of the water softener formed by the soft water control valve of the present invention cooperating with the liquid storage tank;

[0033] Fig.15 It is a schematic diagram of the structure of the medium compaction water path of the water softener formed by the soft water control valve of the present invention cooperating with the liquid storage tank;

[0034] Fig.16 It 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 of the present invention cooperating with the liquid storage tank;

[0035] Fig.17 It is a schematic diagram of the structure of the backflow recovery water path of the water softener formed by the soft water control valve of the present invention cooperating with the liquid storage tank;

[0036] Fig.18 The schematic diagram of the structure of the brine tank replenishing water circuit of the water softener is formed by the soft water control valve of the present invention cooperating with the liquid storage tank. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] The soft water control valve of the present invention can absorb the recovery liquid in the salt box when the forward flow is restored or the reverse flow is restored. The soft water control valve can first shut off the water circuit 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, a cavity 2 is provided in the housing 1 to accommodate a blocking component composed of a grille component and a piston component, a driving component that drives the piston component to move to cooperate with the grille component to form different passages and realize different working states, and a PCBA board 47 for regulating the start and stop of the driving component. The driving component and the PCBA board 47 are arranged on a bottom plate 45, and the bottom plate 45 is connected to the grille component. A protective shell 46 is provided on the bottom plate 45, and an operation display 48 connected to the PCBA board 47 is also provided on the protective shell 46. The operation display 48 is an outward-moving handheld module that can be directly hung on the protective shell 46. The outside of the grille component is sealed with the inner cavity of the housing 1, and the piston assembly is sleeved in the grille component and is sealed with the inside of the grille component.

[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 a liquid storage tank 10. The grille assembly includes two parts, such as Figure 5 As shown, they are respectively a first grille assembly 32 and a second grille assembly 33, the first grille assembly 32 is composed of a top cover, four first water-passing brackets 35 respectively connected to the top cover in sequence, and a first internal water-passing bracket 34 connected to the last first water-passing bracket 35 connected in sequence, the second grille assembly 33 is composed of a second water-passing bracket 36 connected to the first internal water-passing bracket 34 and a second internal water-passing bracket 37 connected to the second water-passing bracket 36, that is, the four first water-passing brackets 35 and the first internal water-passing bracket 34 of the first grille assembly 32 and the inner cavity 2 of the shell 1, and the second water-passing bracket 36 of the second grille assembly 33 and the inner 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, as shown in FIG. Figure 6As shown. The water inlet channel 3 provided on the shell 1 is connected with the fifth flow channel 17, the water outlet channel 4 is connected with the first flow channel 13, the wastewater discharge channel 5 is connected with the third flow channel 15, the central channel 12 is connected with the second flow channel 14, the side wall channel 11 is connected with the fourth flow channel 16, the salt absorption channel 9 is connected with the sixth flow channel 18, the siphon water intake channel 8 is connected with the water outlet channel 4, the mixed water channel 6 is connected with the fourth flow channel 16, and the reverse mixed water channel 7 is connected with the second flow channel 14. Based on the setting of the water channel, the water channel is switched on and off in different working states under the motion coordination of the piston assembly and the grid assembly, and the functions of liquid treatment, dirt flushing, forward flow recovery / reverse flow recovery, medium compaction and salt box replenishment are realized, and the regeneration liquid can be kept for a long time; and for the forward flow recovery / reverse flow recovery function, the piston assembly can be correspondingly configured according to the actual situation.

[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 arranged between the first piston body 19 and the inner cavity 2 of the housing 1, and the second grille assembly 33 is arranged between the second piston body 20 and the inner cavity 2 of the housing 1. A through hole is arranged on the first piston body 19, and the through hole penetrates the first piston body 19 in the axial direction. A first groove 50 is arranged on the first piston body 19. One end of the first piston body 19 is connected to the spiral worm 38, and the other end of the first piston body 19 is connected to the second piston body. A plurality of second grooves 21 are arranged on the second piston body 20. Through the cooperation of the first groove 50 and the second groove 21 with the grille assembly, the soft water control valve is located at different functional positions to achieve different functions of the water softener. The number of 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 cooperates 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 cooperates 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 disposed on a bottom plate 45 connected to a top cover 49 of the grid assembly. Fig. 9As shown, the driving 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 arranged on the helical worm 38. Preferably, there are three stages, that is, the large gear 42 of the first gear set meshes with the gear 39 of the motor 40, the small gear 43 of the first gear set meshes with the large gear 42 of the second gear set, the small gear 43 of the second gear set meshes with the large gear 42 of the third gear set, and the small gear 43 of the third gear set meshes with the piston gear 41. That is, the helical worm 38 is moved forward and backward in a straight line through the meshing rotation between the gears, so as to drive the first piston body 19 and the second piston body 20 to move forward and backward, thereby making the first groove 50 on the first piston body 19 and the second groove 21 on the second piston body 20 located at different positions of the grid assembly, so as to realize the opening and closing of different passages.

[0042] In addition, the soft water control valve of the present invention also includes a water on-off assembly connected to the water outlet pipe of the housing 1, such as Fig.10 and Fig.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 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, a first grille assembly provided in the first valve body 24, a first piston assembly provided in the first grille assembly and cooperating with the first grille assembly to achieve the connection or isolation of the water inlet 22 and the water outlet 23 through its movement, and a first driving assembly driving the first piston assembly to move. 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 spiral worm 38 connected to the third piston body 27. The first driving assembly includes 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 spiral worm 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 arranged at the rear of the shell, and the siphon assembly is connected to the salt box. 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. Fig.12As shown, the water released by the siphon assembly can dissolve the salt in the salt box. A siphon 53, a water intake pipe 54, a mixing water pipe 55, and a reverse mixing water pipe 56 are installed in the shell 58 of the siphon assembly. The siphon 53 is inserted into the shell 1, and a cover 57 is provided at the rear of the siphon assembly. The cover 57 covers the siphon 53 in the shell 1, and the siphon can be quickly taken out. A salt suction port 51 is provided on the shell 58. 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.

[0044] like Fig.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, and 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 for purification, 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 Fig.14 As shown, the soft water control valve of the present invention realizes dirty flushing (i.e., backwashing working state), and 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, so that after the raw water enters from 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, and can also reversely enter the central channel 12 through the second flow channel 14, and the flushed water flows out through the wastewater discharge channel 5 of the side wall channel 11 and the third flow channel 15.

[0046] like Fig.15 As shown, the soft water control valve of the present invention realizes medium compaction (i.e., when in the positive flushing working state), and 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 Fig.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 makes the first groove 50 of the first piston body 19 connect the second flow channel 14 and the third flow channel 15, and the second groove 21 of the second piston body 20 connects the sixth flow channel 18 with the salt absorption channel 9, that is, the raw water reaches the fifth flow channel 17 through the water inlet channel 3, and from the center of the first piston body 19 to the water outlet channel 4. The driving water reaches the siphon from the water outlet channel 4 through the syphon water intake channel 8, and the salt solution is sucked from the salt box through the salt absorption port 51, and mixed in the syphon through the salt absorption channel 9. The mixed salt solution enters the side wall channel 11 from the mixed water channel 6, and the medium is restored downward. 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 Fig.17 As shown, the soft water control valve of the present invention realizes backflow recovery (i.e., in the working state of backflow salt absorption), the movement of the first piston body 19 and the second piston body 20 makes the first groove 50 of the first piston body 19 connect the third flow channel 15 and the fourth flow channel 16, and the second groove 21 of the second piston body 20 connects the sixth flow channel 18 with the salt absorption channel 9, that is, the raw water reaches the fifth flow channel 17 through the water inlet channel 3, and from the center of the first piston body 19 to the water outlet channel 4. The driving water reaches the siphon from the water outlet channel 4 through the siphon water intake channel 8, and the salt solution is sucked from the salt box through the salt absorption port 51, and mixed in the siphon through the salt absorption channel 9. The mixed salt solution enters the central channel 12 through the reverse mixing water channel 7 and the second flow channel 14, and the exchange starts from the bottom of the medium through the central channel 12, and the waste liquid generated flows out from the wastewater discharge channel 5 through the side wall channel 11 through the third channel 15.

[0049] When the present invention 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 Fig.18 As shown, when the soft water control valve of the present invention realizes the replenishment of the salt box, the movement of the first piston body 19 and the second piston body 20 makes the first groove 50 of the first piston body 19 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 with 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 box 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, dirty flushing, forward flow recovery / backflow recovery, medium compaction and salt box 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 comprises 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 the regeneration liquid is sucked in, 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 comprises: A shell (1) is provided with a cavity (2) for accommodating a plugging component, and is provided with a water inlet channel (3), a water outlet channel (4), a wastewater discharge channel (5), a mixed water channel (6), an anti-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 plugging assembly comprises a grid assembly arranged in a cavity (2) and forming a seal with the inner cavity, and a piston assembly arranged in the grid assembly and forming a seal with the inner cavity, wherein the outer portion of the grid assembly divides the inner 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). Through the cooperation of the first groove (50) and the second groove (21) with the grid assembly, the soft water control valve is located at different functional positions, thereby realizing 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 also 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) 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 grille assembly provided in the first valve body (24); a first piston assembly provided in the first grille assembly and cooperating with the first grille assembly to realize the 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 spiral worm (38) connected to the third piston body (27); the first driving 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 spiral 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) arranged between a first piston body (19) and an inner cavity (2) of a shell (1), and a second grid assembly (33) arranged between a second piston body (20) and the inner cavity (2) of the shell (1); the piston assembly also 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 also includes a driving assembly for driving the piston assembly to move to realize the opening and closing of different flow channels. The driving 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 arranged 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, the large gear (42) of the first gear set meshing with the gear (39) of the motor (40), and the small gear (43) of the first gear set meshing 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 on 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 also includes a protective shell (46) buckled on the bottom plate (45); a PCBA board (47) for regulating the operation of a driving component and a waterway on-off component 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 a siphon (53), a water intake pipe (54), a mixing water pipe (55) and a reverse mixing water pipe (56) are arranged in the shell (58) of the siphon assembly, wherein a salt intake port (51) is provided on the shell (58), the siphon (53) is inserted into the shell (1), the water intake pipe (54) is connected to a siphon water intake channel (8), the mixing water pipe (55) is connected to a mixing water channel (6), and the reverse mixing water pipe (56) is connected to a reverse mixing water channel (7).

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