Water softener

Abstract

The invention discloses a water softener, which comprises a water softening valve, which comprises a valve body with a valve cavity, the valve body is provided with a soft tank interface, and the soft tank interface is internally provided with a side wall channel and a central channel which are both communicated with the valve cavity; the soft water tank is mounted on the outer side of the soft tank connector; the first water distributor is mounted on the inner side of the soft tank connector; the first end of the central pipe is communicated with the central channel, and the second end of the central pipe penetrates through the first water distributor so as to extend into the water softening tank; the second water distributor is arranged at the second end of the central pipe; the water softening tank, the first water distributor, the central pipe and the second water distributor define a water softening cavity, the water softening cavity is filled with a water softening medium, and the side wall channel is communicated with the water softening cavity through the first water distributor. According to the technical scheme, the assembly efficiency of the water softener can be improved, and the installation sealing performance of the first water distributor is relatively reliable, so that the risk that a softening medium escapes or hard water flows in is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water softening equipment, in particular to a water softener. Background Art

[0002] Water softeners can soften water, improving user experience and saving detergent and water. However, prior art water softener assembly efficiency is low, and the upper water distributor is prone to misalignment, leading to installation and sealing issues, potentially causing leakage of the softening medium or the intrusion of hard water. Summary of the Invention

[0003] The main purpose of the present invention is to provide a water softener, aiming to solve at least one of the technical problems mentioned in the background technology.

[0004] To achieve the above object, the water softener proposed by the present invention comprises:

[0005] A soft water valve comprises a valve body having a valve cavity, wherein the valve body is provided with a soft tank interface, wherein the soft tank interface is provided with a side wall channel and a central channel both communicating with the valve cavity;

[0006] A soft water tank is installed on the outside of the soft tank interface;

[0007] A first water distributor is installed on the inner side of the soft tank interface;

[0008] a central tube, a first end of which is in communication with the central channel and a second end of which is passed through the first water distributor to extend into the soft water tank; and

[0009] a second water distributor, provided at the second end of the central tube;

[0010] The soft water tank, the first water distributor, the central tube and the second water distributor enclose a soft water cavity filled with a soft water medium. The side wall channel is connected to the soft water cavity through the first water distributor.

[0011] In one embodiment, the first water distributor is snap-connected to the inner side of the soft tank interface.

[0012] In one embodiment, the water softener further includes a water distribution mounting seat, which is fixed to the inner side of the soft tank interface, and the first water distributor is installed on the water distribution mounting seat.

[0013] In one embodiment, the water distribution mounting seat is detachably connected to the soft tank interface; and / or the first water distributor is detachably connected to the water distribution mounting seat.

[0014] In one embodiment, the water distribution mounting seat includes an inner ring portion, an outer ring portion, and several connecting arms connecting the inner ring portion and the outer ring portion. The center tube is adapted to be inserted into the inner ring portion, the outer ring portion is attached to the inner wall surface of the soft tank interface, and the first water distributor is installed on the outer ring portion.

[0015] In one embodiment, at least a portion of the connecting arm corresponding to the soft tank interface is provided with a plurality of screw hole columns, and the corresponding connecting arm is provided with mounting holes corresponding to the screw hole columns. Screws pass through the mounting holes and are connected to the screw hole columns to fix the water distribution mounting seat to the valve body.

[0016] In one embodiment, one of the outer ring portion and the first water distributor is provided with a protruding buckle, and the other is provided with a rotating slot, the rotating slot includes an introduction slot section and a limiting slot section that are bent and connected to each other, and the protruding buckle is inserted into the limiting slot section through the introduction slot section.

[0017] In one embodiment, a central sealing ring is provided between the central channel and the central tube, and the inner ring portion restricts the central sealing ring from escaping from the central channel along the axial direction of the central tube.

[0018] In one embodiment, the first water distributor and the second water distributor are both arranged in a truncated cone shape, and the cross-sections of the first water distributor and the second water distributor are arranged to gradually increase in a direction away from each other.

[0019] In one embodiment, the soft water tank is detachably connected to the soft tank interface.

[0020] In one embodiment, the soft water tank is threadedly connected to the soft tank interface; and / or a soft tank sealing ring is provided between the soft water tank and the soft tank interface.

[0021] In one embodiment, the valve body is further provided with a water inlet channel, a water outlet channel, a sewage discharge channel and a salt absorption and water injection channel;

[0022] The soft water valve further includes a grille assembly provided in the valve cavity and a piston provided in the grille assembly, wherein the grille assembly divides the valve cavity into a plurality of water passage chambers in sequence along its axial direction, wherein the plurality of water passage chambers include a water inlet chamber communicating with the water inlet channel, a side wall chamber communicating with the side wall channel, a sewage discharge chamber communicating with the sewage discharge channel, a central chamber communicating with the central channel, a water outlet chamber communicating with the water outlet channel, and a water injection and salt absorption chamber communicating with the salt absorption and injection channel, wherein the water inlet chamber, the side wall chamber, the sewage discharge chamber, the central chamber, the water outlet chamber, and the water injection and salt absorption chamber are sequentially provided along the axial direction of the valve cavity;

[0023] The soft water valve has multiple water path modes, and the piston moves along the axial direction of the valve cavity to switch the soft water valve between the multiple water path modes.

[0024] In one embodiment, the grille assembly includes a plurality of grille units sequentially spliced ​​and arranged along the axial direction of the valve cavity, with an outer sealing ring groove for mounting an outer sealing ring formed between two adjacent grille units; the grille assembly has a pre-installed state, in which a widened gap can be formed between two adjacent grille units, and the width of the widened gap is smaller than the cross-sectional diameter of the outer sealing ring;

[0025] The soft water valve also includes a drive mounting seat that covers the valve cavity opening; when the valve cavity opening is in an open state, the grille assembly is installed to the valve cavity in the pre-installed state, and the widened gap widens the outer sealing ring groove to provide a larger deformation space for the outer sealing ring; when the drive mounting seat covers the valve cavity opening, the drive mounting seat abuts the grille assembly to eliminate the widened gap, so that the outer sealing ring abuts against the cavity wall of the valve cavity.

[0026] In one embodiment, the piston includes a first piston and a second piston, both of which are provided with a first water-passing ring groove. The axial position of the first water-passing ring groove on the first piston is different from the axial position of the second piston. Either the first piston or the second piston is installed in the grille assembly.

[0027] The multiple water channel modes include a regeneration water channel mode. When the first piston is installed in the grille assembly, in the regeneration water channel mode, the first water ring groove connects the central cavity and the sewage discharge cavity to achieve downstream regeneration; when the second piston is installed in the grille assembly, in the regeneration water channel mode, the first water ring groove connects the side wall cavity and the sewage discharge cavity to achieve countercurrent regeneration.

[0028] In one embodiment, the valve body includes a valve body and a valve base that are spliced ​​together, the soft tank interface is provided on the valve base, and the valve body is provided with a first dividing rib on a side close to the valve base, which cooperates with the grille assembly to separate a plurality of the water flow chambers. The valve base is provided with a second dividing rib corresponding to each of the first dividing ribs, and the first dividing rib has a first rib surface and a second rib surface that are opposite to each other in the radial direction of the valve cavity. The grille assembly is sealed and abutted against the first rib surface, and the second dividing rib is fixedly connected to the second rib surface.

[0029] The technical solution of the present invention separates the first water distributor and the soft water tank on the inner and outer sides of the soft water tank interface, enabling the soft water valve, center pipe, first water distributor, and second water distributor to be installed to form an integrated module before the integrated module is installed with the soft water tank, thereby achieving modular installation of the product and improving product assembly efficiency. In particular, compared to the related art method of installing the soft water valve, upper water distributor, and soft water tank together through bolts, this method does not involve the difficult operation of simultaneously aligning the three, resulting in higher product assembly efficiency and a lower probability of alignment deviation. The installation seal of the first water distributor is relatively reliable, which can reduce the risk of softening medium leakage or hard water intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 This is a schematic structural diagram of an embodiment of a water softener of the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of the explosion of the water softener;

[0033] Figure 3 for Figure 2 A partial enlarged view of point E in the middle;

[0034] Figure 4 for Figure 1 Cross-sectional view of the water softener;

[0035] Figure 5 for Figure 4 A partial enlarged view of point F in the middle;

[0036] Figure 6 for Figure 1 A schematic diagram of the structure of the water softener's water softener valve from one angle;

[0037] Figure 7 for Figure 6 Cross-sectional view of the medium soft water valve along AA;

[0038] Figure 8 for Figure 1 Another angle diagram of the structure of the water softener's soft water valve;

[0039] Figure 9 for Figure 8 Cross-sectional view of the medium soft water valve along BB;

[0040] Figure 10 for Figure 1 Simplified structural diagram of the medium water softener in water production mode;

[0041] Figure 11 for Figure 1 Simplified structural diagram of the medium water softener in water filling mode;

[0042] Figure 12 for Figure 1 Simplified structural diagram of the medium water softener in forward wash mode;

[0043] Figure 13 for Figure 1 Simplified schematic diagram of the water softener in backwash mode;

[0044] Figure 14 for Figure 1 Simplified structural diagram of the medium water softener in downstream regeneration mode;

[0045] Figure 15 A simplified structural diagram of another embodiment of the water softener of the present invention in the countercurrent regeneration mode;

[0046] Figure 16 for Figure 1 A schematic diagram of the structure of the valve body of the water softener's water softener at an angle;

[0047] Figure 17 for Figure 16 Cross-sectional view of the middle valve body along CC;

[0048] Figure 18 for Figure 1 A schematic diagram of the structure of the grid assembly of the soft water valve of the medium water softener;

[0049] Figure 19 for Figure 18 A partial enlarged view of point B in the middle.

[0050] Description of Figure Numbers:

[0051] 1. Valve body; 101. Water inlet channel; 102. Side wall channel; 103. Sewage discharge channel; 104. Center channel; 105. Water outlet channel; 106. Water injection and salt absorption channel; 11. Valve chamber; 111. Water passage chamber; 112. Water inlet chamber; 113. Side wall chamber; 114. Sewage discharge chamber; 115. Center chamber; 116. Water outlet chamber; 117. Water injection and salt absorption chamber; 14. Bypass flow channel; 15. Valve body; 151. First dividing rib; 1511. First rib surface; 1512. Second rib surface; 16. Valve base; 161. Soft tank interface; 162. Second dividing rib; 163. Screw hole column; 2. Grille assembly; 21. Grille unit; 211. Outer sealing ring groove; 212. Widening gap ; 22. Outer sealing ring; 24. Support retaining ring; 3. Piston; 31. First piston body; 311. Water passage; 312. First water ring groove; 32. Second piston body; 321. Second water ring groove; 33. First piston; 34. Second piston; 4. Ejector; 51. Drive mounting seat; 61. First water distributor; 611. Rotating slot; 611a. Introducing slot section; 611b. Limiting slot section; 62. Second water distributor; 63. Center pipe; 64. Water distribution mounting seat; 641. Inner ring; 642. Outer ring; 643. Connecting arm; 644. Mounting hole; 645. Buckle; 65. Center sealing ring; 66. Soft tank sealing ring; 200. Soft water tank; 300. Salt box.

[0052] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0055] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The present invention provides a water softener.

[0057] Reference Figures 1 to 5 In one embodiment of the present invention, the water softener comprises:

[0058] A soft water valve comprises a valve body 1 having a valve cavity 11, wherein the valve body 1 is provided with a soft tank interface 161, wherein the soft tank interface 161 is provided with a side wall channel 102 and a central channel 104 both communicating with the valve cavity 11;

[0059] The soft water tank 200 is installed on the outside of the soft tank interface 161;

[0060] A first water distributor 61 is installed on the inner side of the soft tank interface 161;

[0061] a central tube 63 , a first end of which is in communication with the central channel 104 , and a second end of which is passed through the first water distributor 61 to extend into the soft water tank 200 ; and

[0062] A second water distributor 62 is provided at the second end of the central tube 63;

[0063] The soft water tank 200 , the first water distributor 61 , the central tube 63 and the second water distributor 62 together form a soft water cavity filled with soft water medium. The side wall channel 102 is connected to the soft water cavity through the first water distributor 61 .

[0064] The technical solution of the present invention, by separating the first water distributor 61 and the soft water tank 200 on the inner and outer sides of the soft tank interface 161, enables the soft water valve, center pipe 63, first water distributor 61, and second water distributor 62 to be assembled into a single module before the module is assembled with the soft water tank 200, thereby achieving modular installation and improving product assembly efficiency. In particular, compared to the related art method of bolting the soft water valve, upper water distributor, and soft water tank 200 together, this method avoids the difficulty of simultaneously aligning all three, resulting in higher product assembly efficiency and a lower probability of misalignment. The first water distributor 61 also ensures a relatively reliable seal, reducing the risk of softening medium leakage or hard water intrusion.

[0065] In one embodiment, the first water distributor 61 can be directly installed on the inner side of the soft tank interface 161, that is, a structure connected to the first water distributor 61 can be directly provided on the inner side of the soft tank interface 161, such as a detachable structure such as a snap-on structure or a threaded connection structure, so that the first water distributor 61 can be connected to the inner side of the hose structure in a detachable manner such as a snap-on connection or a threaded connection, thereby reducing the number of installation components and installation steps.

[0066] In another embodiment, the first water distributor 61 can also be indirectly installed on the inner side of the soft tank interface 161. In this case, a water distribution mounting seat 64 is typically provided between the first water distributor 61 and the soft tank interface 161. That is, the water softener further includes a water distribution mounting seat 64, which is fixedly mounted on the inner side of the soft tank interface 161, and the first water distributor 61 is mounted on the water distribution mounting seat 64. It will be appreciated that forming a mounting structure for the first water distributor 61 on the water distribution mounting seat 64 is more convenient and also helps simplify the structure of the soft tank interface 161, and thus, the structure of the valve body 1.

[0067] Optionally, the water distribution mount 64 is detachably connected to the soft tank interface 161. This allows for replacement of only the water distribution mount 64 if damaged, thereby reducing the likelihood of product scrapping. Without loss of generality, the detachable connection between the water distribution mount 64 and the soft tank interface 161 may be achieved by, but is not limited to, at least one of a screw-locking structure and a snap-on structure.

[0068] Optionally, the first water distributor 61 is detachably connected to the water distribution mounting base 64. This allows for replacement of only the first water distributor 61 when the first water distributor 61 is damaged, thereby reducing the probability of product scrapping. This also facilitates cleaning the first water distributor 61 by removing the first water distributor 61. Without loss of generality, the first water distributor 61 and the water distribution mounting base 64 may be detachably connected using, but not limited to, at least one of a screw-locking structure and a snap-on structure.

[0069] In this embodiment, a detachable connection is adopted between the water distribution mounting seat 64 and the soft tank interface 161, and between the first water distributor 61 and the water distribution mounting seat 64; in other embodiments, a detachable connection may be adopted only between the water distribution mounting seat 64 and the soft tank interface 161, or only between the first water distributor 61 and the water distribution mounting seat 64.

[0070] In one embodiment, the water distribution mounting seat 64 includes an inner ring portion 641, an outer ring portion 642, and a plurality of connecting arms 643 connecting the inner ring portion 641 and the outer ring portion 642. The central tube 63 is adapted to be passed through the inner ring portion 641, the outer ring portion 642 is attached to the inner wall surface of the soft tank interface 161, and the first water distributor 61 is installed on the outer ring portion 642. In this embodiment, "several" refers to one or more. When there are multiple connecting arms 643, the multiple connecting arms 643 are spaced apart in the circumferential direction, and water can flow between two adjacent mounting arms. The water distribution mounting seat 64 of this embodiment has a simple and stable structure, and the fit between the outer ring portion 642 and the inner wall surface of the soft tank interface 161 can reduce the risk of softening medium escaping or hard water intrusion.

[0071] Optionally, a plurality of screw hole columns 163 are provided within the soft tank interface 161 corresponding to at least a portion of the connecting arms 643. The corresponding connecting arms 643 are provided with mounting holes 644 corresponding to the screw hole columns 163. Screws are passed through the mounting holes 644 and connected to the screw hole columns 163 to secure the water distribution mounting seat 64 to the valve body. On the one hand, the screw-locking connection method is stable and reliable; on the other hand, the extending direction of the screw hole columns 163 is the same as the axial direction of the soft tank interface 161. In this way, when the valve body 1 is manufactured by a mold forming method such as injection molding or casting, the screw hole columns 163 can be easily formed by a simple mold opening action, without the need for a complex core pulling action. This helps to simplify the manufacturing process of the valve body 1, reduce mold production costs, and reduce product R&D costs.

[0072] Optionally, one of the outer ring portion 642 and the first water distributor 61 is provided with a protruding buckle 645, and the other is provided with a rotating slot 611. The rotating slot 611 includes an introduction slot section 611a and a limiting slot section 611b that are bent and connected to each other. The protruding buckle 645 is inserted into the limiting slot section 611b through the introduction slot section 611a. It can be understood that the introduction slot section 611a extends along the axial direction of the soft tank interface 161, and the limiting slot section 611b extends along the circumferential direction of the soft tank interface 161. Without loss of generality, in this embodiment, the protruding buckle 645 is provided on the inner side surface of the outer ring portion 642, and the rotating slot 611 is provided on the outer side surface of the first water distributor 61. In this embodiment, the first water distributor 61 is connected to the water distribution mounting seat 64 by means of a rotational snap-fit ​​connection. On the one hand, since the rotational snap-fitting slot 611 has an introduction slot section 611a, the snap-fit ​​connection between the two can be easily achieved, which can reduce the difficulty of assembly operation between the two and improve assembly efficiency. On the other hand, to achieve mutual disengagement between the two, the two need to be rotated relative to each other for a certain distance. In this way, when the first water distributor 61 is not subjected to a circumferential driving force, the snap-fit ​​connection between the two can be effectively maintained, thereby reducing the probability of the first water distributor 61 spinning relative to the water distribution mounting seat 64. Furthermore, a limiting protrusion can be provided in the limiting slot section 611b to limit the protrusion buckle 645 from disengaging from the limiting slot section 611b to the introduction slot section 611a, thereby further improving the assembly reliability of the first water distributor 61.

[0073] In one embodiment, a center sealing ring 65 is provided between the center channel 104 and the center tube 63. The inner ring portion 641 restricts the center sealing ring 65 from escaping from the center channel 104 in the axial direction of the center tube 63, thereby ensuring a tight connection between the center tube 63 and the center channel 104. Optionally, an annular recessed groove is provided at the edge of the channel opening of the center channel 104, where the center tube 63 is inserted and installed, for the installation of the center sealing ring 65. It is understood that the annular recessed groove is recessed relative to the inner wall surface of the center channel 104, and one end surface of the inner ring portion 641 abuts against the channel opening of the center channel 104 and covers the notch of the annular recessed groove, thereby restricting the center sealing ring 65 from escaping from the annular recessed groove and limiting the deformation of the center sealing ring 65 in the axial direction of the center tube 63, thereby ensuring a good seal between the center sealing ring 65 and the center tube 63.

[0074] In one embodiment, optionally, the first water distributor 61 is arranged in a truncated cone shape, and the cross-section of the first water distributor 61 is arranged to gradually increase in the direction away from the second water distributor 62. In this way, the water flow surface of the first water distributor 61 is arranged to be inclined, so as to increase the area of ​​the water flow surface of the first water distributor 61, thereby better guiding the water flow to diffuse evenly along the cone surface, avoiding local water flow concentration or dead corners, and helping to increase the flux of the product.

[0075] Optionally, the second water distributor 62 is arranged in a truncated cone shape, and the cross-section of the second water distributor 62 is gradually increased in the direction away from the first water distributor 61. In this way, the water flow surface of the second water distributor 62 is inclined, thereby increasing the area of ​​the water flow surface of the second water distributor 62, thereby better guiding the water flow to diffuse evenly along the cone surface, avoiding local water flow concentration or dead corners, and helping to increase the flux of the product.

[0076] In this embodiment, the first water distributor 61 and the second water distributor 62 are both arranged in a truncated cone shape; however, the present design is not limited thereto. In other embodiments, only the first water distributor 61 may be arranged in a truncated cone shape, or only the second water distributor 62 may be arranged in a truncated cone shape.

[0077] In one embodiment, the soft water tank 200 is detachably connected to the soft tank interface 161 to facilitate replacement or replenishment of the softening medium in the soft water tank 200, or when one of the soft water tank 200 or the soft water valve is damaged, only the damaged part is replaced, thereby reducing the probability of product scrapping.

[0078] Optionally, the soft water tank 200 is threadedly connected to the soft tank interface 161. This threaded connection structure is not only convenient for assembly and disassembly, but also provides a stable and reliable connection and good sealing. However, the present design is not limited thereto. In other embodiments, the soft water tank 200 and the soft tank interface 161 may be connected via a snap-fit ​​structure, such as, but not limited to, a rotary snap-fit ​​connection.

[0079] Optionally, a tank seal ring 66 is provided between the soft water tank 200 and the tank interface 161 to ensure a tight connection between the soft water tank 200 and the tank interface 161. Optionally, an annular groove is provided on the inner side of the tank opening of the soft water tank 200 for receiving the tank seal ring 66. It will be appreciated that the annular groove is recessed relative to the inner wall of the soft water tank 200. The outer surface of the valve body 1 and the annular groove jointly restrict the tank seal ring 66 from dislodging and compress the tank seal ring 66 to ensure a good seal between the soft water tank 200 and the tank interface 161.

[0080] In one embodiment, referring to Figures 6 to 9The valve body 1 is further provided with a water inlet channel 101, a water outlet channel 105, a sewage discharge channel 103, and a salt absorption and injection channel 106. The soft water valve further includes a grille assembly 2 disposed in the valve chamber 11 and a piston 3 disposed in the grille assembly 2. The grille assembly 2 divides the valve chamber 11 into a plurality of water passage chambers 111 in sequence along its axial direction. The plurality of water passage chambers 111 include a water inlet chamber 112 communicating with the water inlet channel 101, a side wall chamber 113 communicating with the side wall channel 102, a sewage discharge chamber 114 communicating with the sewage discharge channel 103, a central chamber 115 communicating with the central channel 105, a water outlet chamber 116 communicating with the water outlet channel 105, and a salt absorption and injection chamber 117 communicating with the salt absorption and injection channel 106. The water inlet chamber 112, sidewall chamber 113, sewage discharge chamber 114, central chamber 115, water outlet chamber 116, and water injection and salt absorption chamber 117 are sequentially arranged along the axial direction of the valve chamber 11. The soft water valve has multiple water path modes, and the piston 3 moves axially along the valve chamber 11 to switch between the multiple water path modes. Optionally, the grille assembly 2 includes multiple spaced support rings 24. The outer edges of the multiple support rings 24 abut the inner circumference of the valve chamber 11, and the inner edges of the support rings 24 abut the piston 3. A water flow chamber 111 is formed between two adjacent support rings 24.

[0081] This piston-type water softener has a larger flow rate and higher water softening efficiency, making it easier to achieve the design goals of small size, large flux, high water production, and high salt efficiency. Furthermore, this piston-type water softener has a long service life. The piston 3 is inserted into the inner periphery of the grille assembly 2, and the outer periphery of the piston 3 is in sealing contact with the inner periphery of the grille assembly 2, that is, the outer periphery of the piston 3 is in sealing contact with the inner periphery of the support ring 24, thereby cutting off the communication between two adjacent water passage chambers 111. The piston 3 is generally provided with multiple water passage positions. When the piston 3 moves to a certain position, at least one of the multiple support rings 24 is positioned relative to the water passage position of the piston 3, thereby forming a water passage gap between the inner periphery of the support ring 24 and the water passage position of the piston 3, thereby achieving communication between the water passage chambers 111 on both sides of the support ring 24. Thus, through the movement of the piston 3, communication is established between the different water passage chambers 111, thereby controlling the direction of water flow and forming corresponding waterways.

[0082] The water inlet chamber 112 can be connected to the water inlet channel 101, which is used to connect to the external water inlet pipe to supply raw water to the soft water valve; the side wall chamber 113 is connected to the soft water tank 200 through the side wall channel 102; the sewage chamber 114 is connected to the external sewage pipe through the sewage channel 103, so as to discharge the waste water in the water softener; the central chamber 115 is connected to the soft water tank 200 through the central channel 104; the water outlet chamber 116 is connected to the external water outlet pipe through the water outlet channel 105, and can discharge the produced soft water; the water injection and salt absorption chamber 117 is connected to the salt box 300 through the water injection and salt absorption channel 106, so as to realize water injection into the salt box 300 and pass the salt water in the salt box 300 into the soft water tank 200, so as to realize the regeneration of the soft water medium in the soft water tank 200.

[0083] Reference Figures 7 to 9 The water inlet chamber 112 and the water outlet chamber 116 are both connected to the external pipeline, but are not connected to the soft water tank 200, while the side wall chamber 113 and the central chamber 115 are both connected to the soft water tank 200. Therefore, the water inlet chamber 112 and the water outlet chamber 116 can be connected to the soft water tank 200 by means of the side wall chamber 113 and the central chamber 115. Therefore, the side wall chamber 113 is adjacent to the water inlet chamber 112, so that the water inlet chamber 112 is connected to the soft water tank 200 through the side wall chamber 113, and the two are adjacent to each other, thereby shortening the flow path of the raw water flowing into the soft water tank 200, thereby simplifying the water path in the soft water valve; the central chamber 115 is adjacent to the water outlet chamber 116, so that the water outlet chamber 116 is connected to the soft water tank 200 through the central chamber 115, and the two are adjacent to each other, thereby shortening the flow path of the softened soft water flowing out of the soft water tank 200, thereby simplifying the water path in the soft water valve.

[0084] When the softened soft water in the soft water tank 200 flows out of the soft water valve, part of the soft water can flow into the water absorption and salt injection chamber 117, thereby injecting water into the salt tank 300. Therefore, the water injection and salt absorption chamber 117 is adjacent to the side of the water outlet chamber 116 away from the central chamber 115, so that when the soft water flows through the water outlet chamber 116, part of the soft water can flow directly from the water outlet chamber 116 to the water injection and salt absorption chamber 117. Compared with the water injection and salt absorption chamber 117 and the water outlet chamber 116 being separated and connected by a special flow channel, this solution can effectively shorten the flow path of the soft water flowing into the salt tank 300, thereby further optimizing the water path of the soft water valve, and no additional special flow channel is required, which helps to reduce the volume of the soft water valve.

[0085] Optionally, the piston 3 includes a first piston body 31 and a second piston body 32 connected to each other, the diameter of the first piston body 31 is larger than the diameter of the second piston body 32, the first piston body 31 is provided with a water passage 311 that passes through both ends, and the water level on the outer periphery of the piston 3 includes a first water ring groove 312 provided on the outer periphery of the first piston body 31 and a second water ring groove 321 provided on the outer periphery of the second piston body 32.

[0086] See also Figure 7 、 Figure 9 and Figure 10 In an embodiment of the present invention, the multiple water channel modes include a water production mode. In the water production mode, the water inlet chamber 112 is connected to the side wall chamber 113 through the first water ring groove 312, and the central chamber 115 is connected to the water outlet chamber 116 through the connection between the first piston body 31 and the second piston body 32. The outer periphery of the first piston body 31 blocks the sewage discharge chamber 114, and the outer periphery of the second piston body 32 blocks the water injection and salt absorption chamber 117; raw water flows into the water inlet chamber 112 through the water inlet channel 101, and flows into the soft water tank 200 through the side wall chamber 113 and the side wall channel 102 in turn to be softened; the softened soft water flows out of the soft water valve through the central channel 104, the central chamber 115, the water outlet chamber 116 and the water outlet channel 105 in turn. Please refer to Figure 10 , Figure 10 This is a simplified structural diagram of the water softener in water production mode. The direction indicated by the arrow in the figure is the water flow direction of the water softener in water production mode.

[0087] See also Figure 7 、 Figure 9 and Figure 11 In an embodiment of the present invention, the plurality of water channel modes include a water injection mode. In the water injection mode, the water inlet chamber 112 is connected to the side wall chamber 113 through the first water ring groove 312, the central chamber 115 is connected to the water outlet chamber 116 through the connection between the first piston body 31 and the second piston body 32, and the water outlet chamber 116 is connected to the water injection and salt absorption chamber 117 through the second water ring groove 321. The outer periphery of the first piston body 31 blocks the sewage discharge chamber 114; raw water flows into the water inlet chamber 112 through the water inlet channel 101, and sequentially passes through the side wall chamber 113. The softened water flows through the central channel 104 and the central cavity 115 into the water outlet cavity 116, and then a portion of the softened water flows out of the softening valve through the water outlet channel 105, and the other portion of the softened water flows into the water injection and salt absorption cavity 117, and then is injected into the salt tank 300 through the water injection and salt absorption channel 106. In this way, on the one hand, the preparation of soft water can be continuously realized when injecting water into the salt tank 300, and on the other hand, the water entering the salt tank 300 is softened soft water, which can reduce the consumption of salt in the salt tank 300. Figure 11 , Figure 11 This is a simplified structural diagram of the water softener in water injection mode. The direction indicated by the arrow in the figure is the water flow direction of the water softener in water injection mode.

[0088] See also Figure 7 、 Figure 9 and Figure 12 In an embodiment of the present invention, the multiple water channel modes include a forward wash mode. In the forward wash mode, the water inlet chamber 112 communicates with the side wall chamber 113 and the water outlet channel 105 via the water flow channel 311. The central chamber 115 communicates with the sewage discharge chamber 114 via the first water flow annular groove 312. The outer periphery of the second piston body 32 blocks the water injection and salt absorption chamber 117. Raw water flows into the water inlet chamber 112 through the water inlet channel 101. A portion of the raw water flows into the water outlet chamber 116 via the water flow channel 311 and is discharged from the soft water valve via the water flow channel 105. The other portion flows into the side wall chamber 113 and flows into the soft water tank 200 via the side wall channel 102 to clean the soft water tank 200. The cleaned sewage is discharged from the soft water valve via the central channel 104, the central chamber 115, the sewage discharge chamber 114, and the sewage discharge channel 103 in sequence. Figure 12 This is a simplified structural diagram of the water softener in forward wash mode. The direction indicated by the arrow in the figure is the water flow direction of the water softener in forward wash mode.

[0089] See also Figure 7 、 Figure 9 and Figure 13 In an embodiment of the present invention, the plurality of water channel modes include a backwash mode. In the backwash mode, the water inlet chamber 112 is connected to the water outlet channel 105 through the water passage 311, the side wall chamber 113 is connected to the sewage discharge chamber 114 through the first water ring groove 312, and the central chamber 115 is connected to the water outlet chamber 116 through the connection between the first piston body 31 and the second piston body 32. The outer periphery of the second piston body 32 blocks the water injection and salt absorption chamber 117; raw water The water flows into the water inlet chamber 112 through the water inlet channel 101 and flows to the water outlet chamber 116 through the water passage 311. A portion of the water then flows out of the soft water valve through the water outlet channel 105. The other portion flows into the central chamber 115 and flows into the soft water tank 200 through the central channel 104 to clean the soft water tank 200. The cleaned wastewater flows out of the soft water valve in sequence through the side wall channel 102, the side wall chamber 113, the sewage chamber 114 and the sewage channel 103. Figure 13 , Figure 13 This is a simplified structural diagram of the water softener in backwash mode. The direction indicated by the arrow in the figure is the water flow direction of the water softener in backwash mode.

[0090] Optionally, the valve body 1 is further provided with a first jet channel, a second jet channel, and a bypass channel 14, the first jet channel is provided between the water inlet chamber 112 and the side wall chamber 113, and the second jet channel is provided between the central chamber 115 and the water outlet chamber 116, the soft water valve also includes an ejector 4 and a plug, one of the ejector 4 and the plug is provided in the first jet channel, and the other is provided in the second jet channel, one end of the bypass channel 14 is connected to the water injection and salt absorption chamber 117, and the other end is connected to both the first jet channel and the second jet channel.

[0091] See also Figure 7 、 Figure 9 and Figure 14 In an embodiment of the present invention, the plurality of water channel modes include a downstream regeneration mode. In the downstream regeneration mode, the ejector 4 is provided in the first jet channel, and the second jet channel is blocked by a plug, so that the central cavity 115 and the water outlet cavity 116 cannot communicate with the bypass channel 14. The water inlet cavity 112 is connected to the water outlet channel 105 through the water passage 311. The water inlet cavity 112 and the side wall cavity 113 are both connected to the first jet channel. The water injection and salt absorption cavity 117 is connected to the bypass channel 14 through the second water passage annular groove 321. The central cavity 115 is connected to the sewage discharge cavity 114 through the first water passage annular groove 312. The side wall cavity 113 is blocked by the outer periphery of the first piston body 31.

[0092] The salt water in the salt tank 300 flows into the bypass channel 14 in sequence through the water injection and salt absorption channel 106 and the water injection and salt absorption chamber 117; the raw water flows into the water inlet chamber 112 through the water inlet channel 101, and a portion of it can flow to the water outlet chamber 116 through the water passage 311 and be discharged from the soft water valve through the water outlet channel 105; the other portion flows to the first jet channel, so that the ejector 4 absorbs the salt water from the salt tank 300 through the bypass channel 14, and in sequence passes through the side wall chamber 113 and the side wall channel 102 into the soft water tank 200, so that the soft water medium in the soft water tank 200 is regenerated, and the regenerated waste water is discharged from the soft water valve in sequence through the central channel 104, the central chamber 115, the sewage chamber 114 and the sewage channel 103. Figure 14 , Figure 14 This is a simplified structural diagram of the water softener in the downstream regeneration mode. The direction indicated by the arrow in the figure is the water flow direction of the water softener in the downstream regeneration mode.

[0093] See also Figure 7 、 Figure 9 and Figure 15In an embodiment of the present invention, the plurality of water channel modes include a countercurrent regeneration mode. In the countercurrent regeneration mode, the first jet channel is blocked by a plug so that the water inlet chamber 112 and the side wall chamber 113 cannot communicate with the bypass channel 14. The ejector 4 is provided in the second jet channel. The water inlet chamber 112 is connected to the water outlet channel 105 through the water passage 311. The water outlet chamber 116 and the central chamber 115 are both connected to the second jet channel. The water injection and salt absorption chamber 117 is connected to the bypass channel 14 through the second water passage annular groove 321. The side wall chamber 113 is connected to the sewage discharge chamber 114 through the first water passage annular groove 312. The central chamber 115 is blocked by the outer periphery of the first piston body 31.

[0094] The salt water in the salt tank 300 flows into the bypass channel 14 in sequence through the water injection and salt absorption channel 106 and the water injection and salt absorption chamber 117; the raw water flows into the water inlet chamber 112 through the water inlet channel 101 and flows to the water outlet chamber 116 through the water passage 311. A portion of the raw water can be discharged from the soft water valve through the water outlet channel 105; the other portion flows to the second jet channel, so that the ejector 4 absorbs the salt water from the salt tank 300 through the bypass channel 14 and flows into the soft water tank 200 in sequence through the central cavity 115 and the central channel 104, so as to regenerate the soft water medium in the soft water tank 200. The regenerated waste water is discharged from the soft water valve in sequence through the side wall channel 102, the side wall cavity 113, the sewage chamber 114 and the sewage channel 103. Figure 15 , Figure 15 This is a simplified structural diagram of the water softener in countercurrent regeneration mode. The direction indicated by the arrow in the figure is the water flow direction of the water softener in countercurrent regeneration mode.

[0095] In one embodiment, please refer to Figure 18 and Figure 19 The grille assembly 2 includes a plurality of grille units 21 sequentially spliced ​​and arranged along the axial direction of the valve chamber 11, and an outer sealing ring groove 211 for installing the outer sealing ring 22 is spliced ​​between two adjacent grille units 21; the grille assembly 2 has a pre-installed state, in which a widened gap 212 can be formed between two adjacent grille units 21, and the width of the widened gap 212 is smaller than the cross-sectional diameter of the outer sealing ring 22;

[0096] When the cavity opening of the valve cavity 11 is in an open state, the grille assembly 2 is installed to the valve cavity 11 in the pre-installed state, widening the gap 212 and widening the outer sealing ring groove 211 to provide a larger deformation space for the outer sealing ring 22; when the driving mounting seat 51 is used to cover the cavity opening of the valve cavity 11, the driving mounting seat 51 abuts against the grille assembly 2 to eliminate the widened gap 212, so that the outer sealing ring 22 is pressed against the cavity wall of the valve cavity 11.

[0097] Specifically, multiple grille units 21 are spliced ​​together in sequence. To facilitate the assembly of the grille assembly 2, during actual assembly, the grille units 21 are often spliced ​​together first, and then the grille assembly 2 is installed as a whole into the valve cavity 11. That is, the multiple grille units 21 and the outer sealing ring 22 are assembled first, and then the grille assembly 2 is installed into the valve cavity 11. Therefore, if the multiple grille units 21 are directly spliced ​​into place, the outer sealing ring 22 is clamped by the outer sealing ring groove 211. In order to ensure the sealing strength, the outer sealing ring 22 and the valve cavity 11 usually adopt an interference fit. As a result, when the grille assembly 2 is actually installed, the friction between the outer sealing ring 22 and the cavity wall of the valve cavity 11 is relatively large, making it difficult to insert the grille assembly 2 into the valve cavity 11. It is also easy to cause the outer sealing ring 22 to shift, which increases the difficulty of installing the grille assembly 2.

[0098] The grille assembly 2 in the present scheme is installed into the valve cavity 11 in a pre-installed state. The existence of the widened gap 212 can further increase the width of the outer sealing ring groove 211 along the axial direction of the valve cavity 11, thereby providing a larger deformation space for the outer sealing ring 22, thereby reducing the friction between the outer sealing ring 22 and the cavity wall of the valve cavity 11 during assembly, making it easier for the grille assembly 2 to be installed into the valve cavity 11, and reducing the probability of the outer sealing ring 22 falling out of the outer sealing ring groove 211; and the existence of the widened gap 212 can also further increase the radial depth of the outer sealing ring groove 211 along the valve cavity 11, thereby allowing more of the outer sealing ring 22 to be installed into the outer sealing ring groove 211, which helps to reduce the outer diameter of the grille assembly 2 at the outer sealing ring 22, thereby reducing the friction between the outer sealing ring 22 and the cavity wall of the valve cavity 11, thereby further facilitating the grille assembly 2 to be installed into the valve cavity 11. Furthermore, the width of the widened gap 212 is smaller than the cross-sectional diameter of the outer sealing ring 22 , thereby reducing the possibility of the outer sealing ring 22 being stuck in the widened gap 212 while reducing the difficulty of installing the grille assembly 2 .

[0099] When the drive mounting seat 51 covers the cavity opening of the valve cavity 11, the drive mounting seat 51 abuts against the grille assembly 2, so that under the pressing action of the drive mounting seat 51, the widened gap 212 is eliminated, and the depth and width of the outer sealing ring groove 211 are reduced, so that the two adjacent grille units 21 can clamp the sealing ring groove 516 together, and the outer sealing ring 22 can be pressed against the cavity wall of the valve cavity 11, thereby facilitating the installation of the grille assembly 2 and ensuring the sealing strength between the grille assembly 2 and the cavity wall of the valve cavity 11.

[0100] In one embodiment, please refer to Figure 14 and Figure 15 The piston 3 includes a first piston 33 and a second piston 34, both of which are provided with a first water-passing annular groove 312. The axial position of the first water-passing annular groove 312 on the first piston 33 is different from the axial position of the second piston 34. Either the first piston 33 or the second piston 34 is installed in the grille assembly 2.

[0101] The various water channel modes include a regeneration water channel mode. When the first piston 33 is installed in the grille assembly 2, in the regeneration water channel mode, the first water ring groove 312 connects the central cavity 115 and the sewage cavity 114 to achieve downstream regeneration; when the second piston 34 is installed in the grille assembly 2, in the regeneration water channel mode, the first water ring groove 312 connects the side wall cavity 113 and the sewage cavity 114 to achieve countercurrent regeneration.

[0102] That is, the soft water valve in this solution can be either a downstream regeneration valve or a reverse flow regeneration valve. From the structural perspective of the soft water valve, the downstream regeneration valve and the reverse flow regeneration valve only have different structures of the first piston 33 and the second piston 34, while the valve body 1, the grid assembly 2 and other structures are exactly the same. That is, the downstream regeneration valve and the reverse flow regeneration valve can share structures such as the valve body 1 and the grid assembly 2. Therefore, in actual production, the downstream regeneration valve and the reverse flow regeneration valve can be realized by producing the same valve body 1, thereby saving the cost of a set of molds, which helps to save the processing cost of the soft water valve. The only difference between the first piston 33 and the second piston 34 is that the axial position of the first water-passing ring groove 312 on the first piston 33 is different from the axial position on the second piston 34, that is, the partial water-passing levels on the first piston 33 and the second piston 34 are different. Therefore, during the actual production of the piston 3, only the position of the first water-passing ring groove 312 needs to be adjusted to simultaneously process the downstream regeneration valve and the reverse regeneration valve. Compared with the prior art, in which the structures of the downstream regeneration valve and the reverse regeneration valve are processed separately and then assembled separately, this solution can not only improve the processing efficiency, but also save the cost of a set of molds, thereby reducing the cost of the soft water valve.

[0103] Please refer to Figures 16 to 18 In one embodiment, the valve body 1 comprises a valve body 15 and a valve base 16, which are assembled into separate parts. A soft tank interface 161 is provided on the valve base 16. A first dividing rib 151 is provided on the side of the valve body 15 near the valve base 16, which cooperates with the grille assembly 2 to separate multiple water passage chambers 111. The valve base 16 has a second dividing rib 162 corresponding to each first dividing rib 151. The first dividing rib 151 has a first rib surface 1511 and a second rib surface 1512 that oppose each other in the radial direction of the valve chamber 11. The grille assembly 2 is in sealing contact with the first rib surface 1511, and the second dividing rib 162 is fixedly connected to the second rib surface 1512. Optionally, the valve body 15 and valve base 16 are connected by hot plate welding.

[0104] Optionally, the first jet channel, the second jet channel, the water inlet channel 101, the water outlet channel 105 and the water injection and salt absorption channel 106 are all formed in the valve body 15, thereby ensuring the circumferential continuity of the first jet channel, the second jet channel, the water inlet channel 101, the water outlet channel 105 and the water injection and salt absorption channel 106, thereby reducing the possibility of water leakage. Of course, in other embodiments, the first jet channel, the second jet channel, the water inlet channel 101, the water outlet channel 105 and the water injection and salt absorption channel 106 can be only partially arranged on the valve body 15, and the other part is formed by splicing the valve body 15 and the valve base 16 and / or arranged on the valve base 16; or, the first jet channel, the second jet channel, the water inlet channel 101, the water outlet channel 105 and the water injection and salt absorption channel 106 are all formed by splicing the valve body 15 and the valve base 16; or, the first jet channel, the second jet channel, the water inlet channel 101, the water outlet channel 105 and the water injection and salt absorption channel 106 are all arranged on the valve base 16.

[0105] In the technical solution of this embodiment, the valve body 15 is provided with a first dividing rib 151 on a side adjacent to the valve base 16 for separating the plurality of water passage chambers 111. The first rib surface 1511 of the dividing rib abuts the grille assembly 2. That is, each first dividing rib 151 abuts a corresponding support ring 24 of the grille assembly 2. As a result, the outer periphery of the grille assembly 2 abuts only against the valve body 15. This eliminates the effect of the abutment between the outer periphery of the grille assembly 2 and the inner periphery of the valve chamber 11 on the connection between the valve body 15 and the valve base 16, thereby reducing the probability of cracking at the connection between the valve body 15 and the valve base 16. In other words, it can reduce the probability of the valve body 1 bursting, thereby increasing the service life of the soft water valve. In addition, the fixed connection between the second dividing rib 162 and the second rib surface 1512 also increases the connection area between the valve body 15 and the valve base 16, thereby increasing the connection strength between the valve body 15 and the valve base 16, further reducing the probability of the valve body 1 bursting, and increasing the service life of the soft water valve.

[0106] Optionally, the joint surface between the valve body 15 and the valve base 16 passes through the bypass channel 14 to facilitate the formation of the bypass channel 14 .

[0107] Optionally, the valve body 1 is further provided with a mixing water channel, one end of which is connected to the water inlet chamber 112 and / or the water inlet channel 101, and the other end is connected to the water outlet chamber 116 and / or the water outlet channel 105; the soft water valve also includes a mixing water valve arranged corresponding to the mixing water channel; thus, in the water production mode, when the mixing water valve is opened, a portion of the raw water can flow directly from the water inlet channel 101 and / or the water inlet chamber 112 through the mixing water channel into the water outlet chamber 116 and / or the water outlet channel 105, thereby mixing with the softened soft water (sodium ions will increase during the softening process), and then transported to the external water outlet pipe to reduce the phenomenon of excessive sodium ions, thereby meeting the low concentration requirements of sodium ions in certain regions (such as Europe). Optionally, the joint surface between the valve body 15 and the valve base 16 passes through the mixing water channel to facilitate the formation of the mixing water channel.

[0108] The above description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A water softener, characterized in that: include: A soft water valve comprises a valve body having a valve cavity, wherein the valve body is provided with a soft tank interface, wherein the soft tank interface is provided with a side wall channel and a central channel both of which are in communication with the valve cavity; A soft water tank is installed on the outside of the soft tank interface; A first water distributor is installed on the inner side of the soft tank interface; a central tube, a first end of which is in communication with the central channel and a second end of which is passed through the first water distributor to extend into the soft water tank; as well as a second water distributor, provided at the second end of the central tube; The soft water tank, the first water distributor, the central tube and the second water distributor enclose a soft water cavity filled with a soft water medium. The side wall channel is connected to the soft water cavity through the first water distributor.

2. The water softener according to claim 1, characterized in that The first water distributor is clamped on the inner side of the soft tank interface.

3. The water softener according to claim 1, wherein The water softener further includes a water distribution mounting seat, which is fixed on the inner side of the soft tank interface, and the first water distributor is installed on the water distribution mounting seat.

4. The water softener according to claim 3, characterized in that The water distribution mounting seat is detachably connected to the soft tank interface; and / or the first water distributor is detachably connected to the water distribution mounting seat.

5. The water softener according to claim 3, characterized in that The water distribution mounting seat includes an inner ring portion, an outer ring portion, and several connecting arms connecting the inner ring portion and the outer ring portion. The center tube is adapted to be passed through the inner ring portion, the outer ring portion is attached to the inner wall surface of the soft tank interface, and the first water distributor is installed on the outer ring portion.

6. The water softener according to claim 5, characterized in that At least a portion of the connecting arm corresponding to the soft tank interface is provided with a plurality of screw hole columns, and the corresponding connecting arm is provided with mounting holes corresponding to the screw hole columns. Screws pass through the mounting holes and are connected to the screw hole columns to fix the water distribution mounting seat to the valve body.

7. The water softener according to claim 5, characterized in that One of the outer ring portion and the first water distributor is provided with a convex buckle, and the other is provided with a rotation slot. The rotation slot includes an introduction slot section and a limiting slot section that are bent and connected to each other. The convex buckle is inserted into the limiting slot section through the introduction slot section.

8. The water softener according to claim 5, characterized in that A central sealing ring is provided between the central channel and the central tube, and the inner ring portion restricts the central sealing ring from separating from the central channel along the axial direction of the central tube.

9. The water softener according to claim 1, wherein: The first water distributor and the second water distributor are both arranged in a truncated cone shape, and the cross sections of the first water distributor and the second water distributor are arranged to gradually increase in a direction away from each other.

10. The water softener according to claim 1, wherein The soft water tank is detachably connected to the soft tank interface.

11. The water softener according to claim 10, wherein: The soft water tank is threadedly connected to the soft tank interface; and / or a soft tank sealing ring is provided between the soft water tank and the soft tank interface.

12. The water softener according to any one of claims 1 to 11, characterized in that: The valve body is further provided with a water inlet channel, a water outlet channel, a sewage discharge channel and a salt absorption and water injection channel which are connected to the valve cavity; The soft water valve further includes a grille assembly provided in the valve cavity and a piston provided in the grille assembly, wherein the grille assembly divides the valve cavity into a plurality of water passage chambers in sequence along its axial direction, wherein the plurality of water passage chambers include a water inlet chamber communicating with the water inlet channel, a side wall chamber communicating with the side wall channel, a sewage discharge chamber communicating with the sewage discharge channel, a central chamber communicating with the central channel, a water outlet chamber communicating with the water outlet channel, and a water injection and salt absorption chamber communicating with the salt absorption and injection channel, wherein the water inlet chamber, the side wall chamber, the sewage discharge chamber, the central chamber, the water outlet chamber, and the water injection and salt absorption chamber are sequentially provided along the axial direction of the valve cavity; The soft water valve has multiple water path modes, and the piston moves along the axial direction of the valve cavity to switch the soft water valve between the multiple water path modes.

13. The water softener according to claim 12, wherein: The grille assembly includes a plurality of grille units sequentially spliced ​​and arranged along the axial direction of the valve cavity, with an outer sealing ring groove for mounting an outer sealing ring formed between two adjacent grille units; the grille assembly has a pre-installed state, in which a widened gap can be formed between two adjacent grille units, and the width of the widened gap is smaller than the cross-sectional diameter of the outer sealing ring; The soft water valve further includes a drive mounting seat for sealing the valve cavity opening; when the valve cavity opening is in an open state, the grille assembly is mounted to the valve cavity in the pre-installed state, and the widened gap widens the outer sealing ring groove to provide a larger deformation space for the outer sealing ring; When the drive mounting seat covers the cavity opening of the valve cavity, the drive mounting seat abuts against the grid assembly to eliminate the widened gap, so that the outer sealing ring abuts against the cavity wall of the valve cavity.

14. The water softener according to claim 12, wherein: The piston includes a first piston and a second piston, both of which are provided with a first water-passing ring groove. The axial position of the first water-passing ring groove on the first piston is different from the axial position of the first water-passing ring groove on the second piston. Either the first piston or the second piston is installed in the grille assembly. The multiple water channel modes include a regeneration water channel mode. When the first piston is installed in the grille assembly, in the regeneration water channel mode, the first water ring groove connects the central cavity and the sewage discharge cavity to achieve downstream regeneration; when the second piston is installed in the grille assembly, in the regeneration water channel mode, the first water ring groove connects the side wall cavity and the sewage discharge cavity to achieve countercurrent regeneration.

15. The water softener according to claim 12, wherein: The valve body includes a valve body and a valve base that are spliced ​​together. The soft tank interface is provided on the valve base. The valve body is provided with a first dividing rib on one side close to the valve base, which cooperates with the grille assembly to separate a plurality of water flow chambers. The valve base is provided with a second dividing rib corresponding to each of the first dividing ribs. The first dividing rib has a first rib surface and a second rib surface that are opposite to each other in the radial direction of the valve cavity. The grille assembly is sealed and abutted against the first rib surface, and the second dividing rib is fixedly connected to the second rib surface.

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