Water softening device

Abstract

The utility model discloses a water softening device, which belongs to the technical field of water softening, the water softening device comprises a resin tank, a water distribution component and a waterway valve, the resin tank is provided with a resin cavity, and the resin cavity is used for accommodating a resin layer; the water distribution assembly is arranged in the resin cavity and comprises a central pipe and an upper water distributor, and the upper water distributor is located above the resin layer; the waterway valve is arranged at the top of the resin tank and is provided with a softening channel, a regeneration channel and a water outlet channel, the water outlet channel is communicated with the central pipe, to-be-softened water introduced by the softening channel flows through the upper water distributor to enter the resin layer, and saline water introduced by the regeneration channel flows through the upper water distributor to enter the resin layer. The softening channel and the regeneration channel are separately arranged, brine flow or flow velocity can be conveniently adjusted according to requirements, and the upper water distributor is matched to uniformly distribute water, so that sufficient contact between brine and the resin layer is ensured, and the regeneration quality and the brine utilization rate are improved.

Description

Technical Field

[0001] This utility model relates to the field of water softening technology, and in particular to a water softening device. Background Technology

[0002] With the improvement of people's living standards, water softening equipment has been widely used. Water softening equipment contains softening resin, which uses its own cations to adsorb calcium and magnesium ions in the water, thereby softening the water. After a period of operation, the calcium and magnesium ions adsorbed by the softening resin become saturated, causing the water softening function to deteriorate or even be lost. To ensure that the water softening equipment can continuously soften the water, the softening resin needs to be regenerated regularly.

[0003] Water softening equipment typically includes a water circuit valve, a resin tank, a central pipe, and a distributor. The distributor is housed within the resin tank, with a resin layer filling the space between the tank and the distributor. This resin layer is located on the outer periphery of the central pipe. Existing water circuit valves usually have two inlets, one of which connects to the central pipe, with the softening and regeneration channels sharing the same conduit. However, in practical use, it has been found that brine tends to accumulate around the central pipe and fails to make sufficient contact with the resin, resulting in incomplete resin regeneration. Utility Model Content

[0004] The purpose of this invention is to provide a water softening device to solve the technical problem of insufficient resin regeneration in the prior art.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A water softening device, comprising:

[0007] A resin tank having a resin cavity for accommodating a resin layer;

[0008] A water distribution assembly is disposed within the resin cavity. The water distribution assembly includes a central tube and an upper water distributor, with the upper water distributor located above the resin layer.

[0009] A water valve is installed at the top of the resin tank. The water valve has a softening channel, a regeneration channel and an outlet channel. The outlet channel is connected to the central pipe. The water to be softened introduced by the softening channel flows through the upper water distributor into the resin layer. The brine introduced by the regeneration channel flows through the upper water distributor into the resin layer.

[0010] Preferably, the upper water distributor includes at least two layers of water distribution plates arranged from top to bottom. Water distribution plates have water passage holes. The water to be softened flows through the M layers of the water distribution plates and then enters the resin layer. The brine flows through the N layers of the water distribution plates and then enters the resin layer. M is greater than 0 and less than N, and N is greater than or equal to 2.

[0011] Preferably, the flow area of ​​the water distribution plate located on the upper layer is smaller than that of the water distribution plate located on the lower layer; and / or, the flow area of ​​the water holes on each water distribution plate gradually decreases from top to bottom.

[0012] Preferably, the water passage is a circular hole or the water passage extends in an arc shape around the axis of the water distribution plate.

[0013] Preferably, the upper water distributor includes two layers of water distribution plates arranged vertically, namely a first water distribution plate and a second water distribution plate. The brine flows through the first water distribution plate and the second water distribution plate in sequence and then enters the resin layer. The water to be softened flows through the second water distribution plate and then enters the resin layer.

[0014] Preferably, the water softening device further includes an upper end cap, which includes a softening pipe, a regeneration pipe, and a water outlet pipe. The softening pipe, the regeneration pipe, and the water outlet pipe are respectively connected to the softening channel, the regeneration channel, and the water outlet channel. The lower end of the softening pipe passes through the first water distribution plate and is located above the second water distribution plate, and the lower end of the regeneration pipe is located above the first water distribution plate.

[0015] Preferably, the water valve includes a valve chamber and a water circuit switching component disposed within the valve chamber, the water circuit switching component being used to selectively open either the softening channel or the regeneration channel.

[0016] Preferably, the water valve has an inlet, an outlet, a brine inlet, and a drain outlet. When the softening channel is connected to the inlet, the outlet channel is connected to the outlet. When the regeneration channel is connected to the brine inlet, the outlet channel is connected to the drain outlet.

[0017] Preferably, at least a portion of the regeneration channel has a flow area smaller than that of the softening channel; and / or, the softening channel and the regeneration channel are distributed on opposite sides of the effluent channel.

[0018] Preferably, the water distribution assembly further includes a lower water distributor, which is disposed at the bottom end of the central tube and located below the resin layer.

[0019] The beneficial effects of this utility model are:

[0020] The water softening device proposed in this utility model has a water valve with a softening channel, a regeneration channel, and an outlet channel. The outlet channel is connected to the central pipe. During softening, the water to be softened introduced into the softening channel flows through the upper water distributor into the resin layer. After being softened by the resin layer, it flows out as soft water from the central pipe and the outlet channel. During regeneration, the brine introduced into the regeneration channel flows through the upper water distributor into the resin layer. During the process of passing through the resin layer, the resin is regenerated, and the wastewater flows out from the central pipe and the outlet channel. By setting the softening channel and the regeneration channel separately, it is convenient to adjust the flow rate or velocity of the water to be softened and the brine according to the needs. Combined with the upper water distributor to distribute water evenly, it ensures that the brine and the resin layer are in full contact, improves the regeneration quality and brine utilization rate, and at the same time ensures that the water to be softened can flow quickly through the resin layer to ensure the water softening efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the water softening device provided in this embodiment of the utility model;

[0022] Figure 2 This is a cross-sectional view of the water softening device provided in this embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the water softening device provided in this embodiment of the utility model, omitting the water circuit valve;

[0024] Figure 4 This is a cross-sectional view of the water softening device provided in this embodiment of the present invention, omitting the water circuit valve;

[0025] Figure 5 This is a partial structural cross-sectional view of the upper end cap, central tube, upper water distributor, and resin tank provided in this embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the upper end cap provided in an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the water distribution assembly provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the first structure of the first water distribution plate provided in this embodiment of the utility model;

[0029] Figure 9 This is a schematic diagram of the second structure of the first water distribution plate provided in this embodiment of the utility model;

[0030] Figure 10 This is a schematic diagram of the first structure of the second water distribution plate provided in this embodiment of the utility model;

[0031] Figure 11 This is a schematic diagram of the second structure of the second water distribution plate provided in this embodiment of the utility model;

[0032] Figure 12 This is a first structural schematic diagram of the water distributor provided in this embodiment of the utility model;

[0033] Figure 13 This is a schematic diagram of the second structure of the water distributor provided in this embodiment of the utility model;

[0034] Figure 14 This is a schematic diagram of the structure of the water valve provided in this embodiment of the utility model;

[0035] Figure 15 This is a cross-sectional view of the water valve provided in this embodiment of the utility model;

[0036] Figure 16 This is a schematic diagram of the water valve provided in this embodiment of the utility model, omitting the lower valve body;

[0037] Figure 17 This is a schematic diagram of the lower valve body provided in an embodiment of the present invention;

[0038] Figure 18 This is a side view of the water valve provided in this embodiment of the utility model;

[0039] Figure 19 yes Figure 18 A sectional view along line AA.

[0040] In the picture:

[0041] 10. Resin tank; 11. Resin cavity; 12. Mounting slot;

[0042] 20. Water distribution assembly; 21. Central pipe; 211. First limiting part; 212. Second limiting part; 22. Upper water distributor; 220. Water passage hole; 221. First water distribution plate; 2211. First central hole; 2212. Eccentric hole; 2213. First base plate; 2214. First flange; 2215. First positioning part; 2216. Second positioning part; 222. Second water distribution plate; 2221. Second central hole; 2222. First top plate; 2223. Second flange; 2224. First water guiding protrusion; 23. Lower water distributor; 231. Water distribution hole; 232. Third central hole; 233. Second water guiding protrusion; 234. Third flange;

[0043] 30. Water circuit valve; 301. Softening channel; 302. Regeneration channel; 303. Outlet channel; 304. Inlet; 305. Outlet; 306. Brine suction port; 307. Sewage discharge port; 31. Valve chamber; 32. Water circuit on / off assembly; 321. Grille assembly; 322. Piston assembly; 323. Drive assembly; 33. Main valve body; 34. Lower valve body;

[0044] 40. Upper end cap; 41. Softening pipe; 42. Regeneration pipe; 43. Outlet pipe; 44. First clip;

[0045] 50. Lower end cap;

[0046] 60. First pressure plate;

[0047] 70. Second pressure plate;

[0048] 80. First fastener. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0050] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0053] See Figures 1 to 19This embodiment provides a water softening device, including a resin tank 10, a water distribution assembly 20, and a water valve 30. The resin tank 10 has a resin cavity 11 for accommodating a resin layer. The water distribution assembly 20 is disposed in the resin cavity 11 and includes a central pipe 21 and an upper water distributor 22, which is located above the resin layer. The water valve 30 is disposed on the top of the resin tank 10 and has a softening channel 301, a regeneration channel 302, and an outlet channel 303. The outlet channel 303 is connected to the central pipe 21. The water to be softened introduced through the softening channel 301 flows through the upper water distributor 22 into the resin layer, and the brine introduced through the regeneration channel 302 flows through the upper water distributor 22 into the resin layer.

[0054] During softening, the water to be softened introduced through softening channel 301 flows through upper distributor 22 into the resin layer, where it is softened into soft water and flows out through central pipe 21 and outlet channel 303. During regeneration, brine introduced through regeneration channel 302 flows through upper distributor 22 into the resin layer, regenerating the resin during the process, and wastewater flows out through central pipe 21 and outlet channel 303. By separating softening channel 301 and regeneration channel 302, it is easy to adjust the flow rate or velocity of the water to be softened and brine as needed. Combined with the uniform water distribution by upper distributor 22, this ensures sufficient contact between the brine and the resin layer, improving regeneration quality and brine utilization rate, while also ensuring that the water to be softened can flow quickly through the resin layer, guaranteeing water softening efficiency. Figure 2 The arrows in the image basically indicate the direction of water flow during softening. Figure 4 The arrows in the diagram basically indicate the direction of water flow during regeneration.

[0055] The water distribution assembly 20 also includes a lower water distributor 23, which is located at the bottom end of the central pipe 21 and below the resin layer. That is, the resin layer is positioned between the upper water distributor 22 and the lower water distributor 23, and is used for ion exchange with calcium and magnesium ions in the water to be softened. The central pipe 21 passes through the resin layer, allowing water to flow from the bottom end of the central pipe 21 to the top end.

[0056] The resin tank 10 is typically cylindrical, but other shapes can be used as needed. The water softening device also includes an upper end cap 40 and a lower end cap 50. The upper end cap 40 is located at the top of the resin chamber 11, and the lower end cap 50 is located at the bottom of the resin chamber 11. The upper end cap 40 and the lower end cap 50 provide a seal for the resin tank 10. A sealing ring is provided between the outer periphery of the upper end cap 40 and the inner wall of the resin chamber 11. A sealing ring is also provided between the outer periphery of the lower end cap 50 and the inner wall of the resin chamber 11.

[0057] The upper end cap 40 is connected to the resin tank 10 via a first pressure plate 60, and the lower end cap 50 is connected to the resin tank 10 via a second pressure plate 70. Specifically, the inner wall of the resin tank 10 is provided with an installation groove 12. The edge of the first pressure plate 60 is inserted into the installation groove 12, and the first pressure plate 60 and the upper end cap 40 are locked together by a first fastener 80. The edge of the second pressure plate 70 is inserted into the installation groove 12, and the second pressure plate 70 and the lower end cap 50 are locked together by a second fastener. For example, two first pressure plates 60 are provided corresponding to the upper end cap 40, and two second pressure plates 70 are provided corresponding to the lower end cap 50, which facilitates installation and disassembly.

[0058] A first snap fastener 44 is provided on one side of the upper end cap 40, and the first snap fastener 44 is snapped into the first slot at the top of the resin tank 10. A second snap fastener is provided on one side of the lower end cap 50, and the second snap fastener is snapped into the second slot at the bottom of the resin tank 10.

[0059] The upper end cap 40 includes a softening pipe 41, a regeneration pipe 42, and a water outlet pipe 43, which are respectively connected to the softening channel 301, the regeneration channel 302, and the water outlet channel 303. The upper end cap 40 serves as a transition, allowing the water valve 30 to be smoothly connected to the resin tank 10.

[0060] The upper water distributor 22 is used to evenly distribute the water flowing from the softening channel 301 and the regeneration channel 302. In this embodiment, the upper water distributor 22 includes at least two layers of water distribution plates arranged from top to bottom. Water passage holes 220 are formed on the water distribution plates. After the softened water flows through M layers of water distribution plates, it enters the resin layer. After the brine flows through N layers of water distribution plates, it enters the resin layer. M is greater than 0 and less than N, and N is greater than or equal to 2. The values ​​of M and N can be selected according to actual needs, as long as the number of water distribution plates through which the softened water flows is less than the number of water distribution plates through which the brine flows. This allows the multiple layers of water distribution plates to better buffer the brine, reducing the brine flow rate, ensuring sufficient contact between the brine and the resin layer, and improving the regeneration quality and brine utilization rate.

[0061] In some embodiments, the flow rate of the brine within the resin layer is lower than the flow rate of the water to be softened within the resin layer. The lower flow rate of the brine allows it to pass through the resin layer slowly, ensuring sufficient contact with the resin layer; the higher flow rate of the water to be softened allows it to pass through the resin layer quickly, ensuring softening efficiency.

[0062] The water passage hole 220 is used for water to flow through the water distribution plate. The shape of the water passage hole 220 can be set according to actual needs. The water passage hole 220 can be a circular hole, an elliptical hole, or a rectangular hole. The water passage hole 220 can extend in an arc around the axis of the water distribution plate.

[0063] In some embodiments, the flow area of ​​the upper water distribution plate is smaller than that of the lower water distribution plate. Therefore, the brine flows slowly through the upper water distribution plate, which effectively slows down and evens out the flow of the brine, ensuring that the brine is evenly distributed into the resin layer and that there is sufficient contact between the brine and the resin layer.

[0064] In some embodiments, the flow area of ​​the water passage holes 220 on each water distribution plate gradually decreases from top to bottom, which buffers and slows down the water flow, allowing the water to flow smoothly through the water distribution plate and ensuring that the brine and resin layer are in full contact.

[0065] In some embodiments, M=2, N=3, the softened water flows through two water distribution plates before entering the resin layer, and the brine flows through three water distribution plates before entering the resin layer. In some embodiments, M=1, N=3, the softened water flows through one water distribution plate before entering the resin layer, and the brine flows through three water distribution plates before entering the resin layer.

[0066] When the water to be softened flows through only one layer of distribution plates, it flows through the bottommost distribution plate. When the water to be softened flows through two layers of distribution plates, it flows through the bottom two distribution plates.

[0067] In this embodiment, M=1 and N=2. The softened water flows through one layer of water distribution plate and then enters the resin layer, while the brine flows through two layers of water distribution plate and then enters the resin layer. The two layers of water distribution plate act as a double buffer for the brine to reduce the brine flow rate without significantly increasing the cost.

[0068] Specifically, the upper water distributor 22 includes two layers of water distribution plates arranged vertically, namely the first water distribution plate 221 and the second water distribution plate 222. The brine flows through the first water distribution plate 221 and the second water distribution plate 222 in sequence and then enters the resin layer. The softened water flows through the second water distribution plate 222 and then enters the resin layer.

[0069] A sealing ring is provided between the outer periphery of the first water distribution plate 221 and the inner wall of the resin cavity 11. A sealing ring is provided between the outer periphery of the second water distribution plate 222 and the inner wall of the resin cavity 11. The water passage holes 220 on the second water distribution plate 222 not only serve the function of water distribution, but also prevent resin particles from entering above the second water distribution plate 222.

[0070] For the upper end cap 40, the lower end of the softening pipe 41 passes through the first water distribution plate 221 and is located above the second water distribution plate 222, while the lower end of the regeneration pipe 42 is located above the first water distribution plate 221. The outlet pipe 43 is connected to the central pipe 21, and the first water distribution plate 221 is fitted over the outside of the outlet pipe 43. A sealing ring is provided between the first water distribution plate 221 and the outlet pipe 43.

[0071] Specifically, the first water distribution plate 221 has a first central hole 2211 and an eccentric hole 2212. The first central hole 2211 is used to pass through the water outlet pipe 43, and the eccentric hole 2212 is used to pass through the softening pipe 41. The first water distribution plate 221 is provided with a plurality of circular water passage holes 220. The number and diameter of the water passage holes 220 can be set according to actual needs.

[0072] The first water distribution plate 221 includes a first base plate 2213 and a first flange 2214. The first flange 2214 is disposed on the outer peripheral edge of the first base plate 2213 and folded upward. The first base plate 2213 and the first flange 2214 form a first water distribution cavity. A water passage hole 220 is provided on the first base plate 2213. A first central hole 2211 and an eccentric hole 2212 are both disposed on the first base plate 2213, and the edges of the first central hole 2211 and the edges of the eccentric hole 2212 are both provided with flanges to increase the contact area with the water outlet pipe 43 and the softening pipe 41, so that the first water distribution plate 221 and the upper end cap 40 fit stably.

[0073] The first water distribution plate 221 also includes a first positioning part 2215 and a second positioning part 2216. The first positioning part 2215 is disposed on the first flange 2214 and protrudes from the upper side of the first flange 2214, and the second positioning part 2216 is disposed on the first base plate 2213 and protrudes from the lower side of the first base plate 2213. During installation, the first positioning part 2215 abuts against the bottom end of the upper end cap 40, and the second water distribution plate 222 abuts against the second positioning part 2216, thus completing the installation.

[0074] The second water distribution plate 222 has a second central hole 2221 for the central pipe 21 to pass through. The second water distribution plate 222 has multiple arc-shaped water passage holes 220. The number and diameter of the water passage holes 220 can be set according to actual needs.

[0075] The second water distribution plate 222 includes a first top plate 2222 and a second flange 2223. The second flange 2223 is disposed on the outer peripheral edge of the first top plate 2222 and folded downward. A water passage hole 220 is provided on the first top plate 2222. A second central hole 2221 is disposed on the first top plate 2222, and the water passage hole 220 extends in an arc shape around the first central hole 2211.

[0076] The second water distribution plate 222 also includes a first water guiding protrusion 2224, which extends radially along the second water distribution plate 222. Water passage holes 220 are provided between adjacent first water guiding protrusions 2224. By providing the first water guiding protrusions 2224, the circumferential flow of water is reduced, resulting in a more uniform water distribution. The radial extension length of the first water guiding protrusions 2224 can be set according to actual needs.

[0077] The upper part of the central tube 21 is provided with a first limiting part 211. When the second water distribution plate 222 is sleeved on the central tube 21, the second water distribution plate 222 abuts against the first limiting part 211 to limit the second water distribution plate 222.

[0078] The lower water distributor 23 has several water distribution holes 231. The diameter of the water distribution hole 231 at the end near the resin layer is smaller than the particle size of the resin particles to prevent resin particles from entering the lower part of the lower water distributor 23. The water in the resin layer flows to the central pipe 21 through the lower water distributor 23.

[0079] The diameter of the lower water distributor 23 is basically equal to the inner diameter of the resin tank 10, or a sealing ring is provided between the lower water distributor 23 and the inner wall of the resin tank 10. On the one hand, it can prevent resin particles from entering the lower water distributor 23. On the other hand, the area of ​​the lower water distributor 23 is large enough to ensure that the water flow is evenly distributed, so as to prevent the corners of the resin layer from not being in full contact with the water flow and avoid the formation of blind spots.

[0080] In this embodiment, the lower end of the central tube 21 is inserted into the lower water distributor 23. A second limiting part 212 is provided at the lower part of the central tube 21. When the central tube 21 is inserted into the lower water distributor 23, the lower water distributor 23 abuts against the second limiting part 212 to limit the movement of the lower water distributor 23. A sealing ring is provided between the lower water distributor 23 and the central tube 21.

[0081] The lower water distributor 23 has a third central hole 232 for the central pipe 21 to pass through. A grid structure is installed inside the third central hole 232 to even out the water flow and prevent larger foreign objects from entering or leaving the central pipe 21.

[0082] In this embodiment, the water distribution holes 231 extend in an arc around the circumference of the lower water distributor 23. Multiple water distribution holes 231 are distributed on multiple concentric rings. Along the axial direction of the lower water distributor 23, the flow area of ​​the water distribution holes 231 can be uniform, or the flow area of ​​the water distribution holes 231 can gradually decrease along the axial direction of the lower water distributor 23, with the end of the water distribution hole 231 closest to the resin layer being the smallest end of the water distribution hole 231.

[0083] In this embodiment, a plurality of second water-guiding protrusions 233 are provided on the lower surface of the lower water distributor 23. The second water-guiding protrusions 233 extend radially along the lower water distributor 23, and water-dividing holes 231 are provided between adjacent second water-guiding protrusions 233. By providing the second water-guiding protrusions 233, the circumferential flow of water is reduced, making the water flow distribution more uniform.

[0084] The outer periphery of the lower water distributor 23 is folded upward to form a third flange 234. A sealing groove is provided on the third flange 234 in a circumferential direction to accommodate the sealing ring.

[0085] The water valve 30 includes a valve chamber 31 and a water circuit switching component 32 disposed within the valve chamber 31. The water circuit switching component 32 is used to selectively open either the softening channel 301 or the regeneration channel 302. When the softening channel 301 is open, the regeneration channel 302 is closed; when the regeneration channel 302 is open, the softening channel 301 is closed. When the softening channel 301 is open, the water to be softened can enter the resin chamber 11 through the softening channel 301; when the regeneration channel 302 is open, the brine can enter the resin chamber 11 through the regeneration channel 302.

[0086] Specifically, the water valve 30 has an inlet 304, an outlet 305, a brine suction port 306, and a sewage discharge port 307. When the softening channel 301 is connected to the inlet 304, the outlet channel 303 is connected to the outlet 305. When the regeneration channel 302 is connected to the brine suction port 306, the outlet channel 303 is connected to the sewage discharge port 307. During softening, the inlet 304 is connected to the softening channel 301, and the outlet channel 303 is connected to the outlet 305. The water to be softened entering through the inlet 304 enters the resin chamber 11 through the softening channel 301, and the outlet channel 303 guides the softened water to flow out through the outlet 305. During regeneration, the brine inlet 306 is connected to the softening channel 301, and the outlet channel 303 is connected to the sewage outlet 307. The brine entering through the brine inlet 306 enters the resin chamber 11 through the regeneration channel 302, and the outlet channel 303 guides the wastewater to flow out through the sewage outlet 307.

[0087] The water circuit switching assembly 32 includes a grille assembly 321 and a piston assembly 322. The exterior of the grille assembly 321 forms a sealed connection with the valve chamber 31, and the piston assembly 322 is movably disposed within the grille assembly 321 and can form a sealed connection with the interior of the grille assembly 321. The water circuit switching assembly 32 also includes a drive assembly 323, which drives the piston assembly 322 to move in coordination with the grille assembly 321 to form different passages and achieve different working states.

[0088] In this embodiment, the piston assembly 322 can move between a first position and a second position. When the piston assembly 322 is in the first position, the softening channel 301 is connected to the inlet 304 and the outlet channel 303 is connected to the outlet 305. When the piston assembly 322 is in the second position, the regeneration channel 302 is connected to the brine inlet 306 and the outlet channel 303 is connected to the sewage outlet 307. Figure 19 The piston assembly 322 shown is in the second position, with the water outlet channel 303 connected to the drain outlet 307. When the piston assembly 322 is in the second position... Figure 19 Moving to the left in the indicated direction can move to the first position. At this time, the piston assembly 322 blocks the drain port 307 and the brine inlet 306, and connects the inlet 304 with the softening channel 301, while connecting the outlet channel 303 with the outlet 305.

[0089] In this embodiment, the water valve 30 has a split structure, which facilitates connection with the upper end cap 40. Specifically, the water valve 30 includes a main valve body 33 and a lower valve body 34. The main valve body 33 and the lower valve body 34 are detachably connected and interlock to form a softening channel 301, a regeneration channel 302 and a water outlet channel 303. The lower valve body 34 is connected to the upper end cap 40.

[0090] To ensure softening flow rate, current water softening equipment typically increases the flow area of ​​the inlet. Since the softening channel and the regeneration channel are the same, the increased flow area means that during resin regeneration, the brine with a smaller flow rate does not have enough power to disperse into the resin layer, thus failing to make sufficient contact with the resin, resulting in incomplete resin regeneration.

[0091] In some embodiments, the flow area of ​​at least a portion of the regeneration channel 302 is smaller than the flow area of ​​the softening channel 301. The smaller flow area of ​​the regeneration channel 302 is more suitable for brine flow rates; therefore, a small flow rate of brine passing through the smaller flow area of ​​the regeneration channel 302 can increase its velocity, distributing it into the resin layer under a certain force, ensuring sufficient contact with the resin layer, and improving regeneration quality and brine utilization. The larger flow area of ​​the softening channel 301 is more suitable for the flow rate of the water to be softened, allowing the water to flow quickly through the resin layer, ensuring water softening efficiency. Exemplarily, the maximum flow area of ​​the regeneration channel 302 is smaller than the minimum flow area of ​​the softening channel 301. Exemplarily, the minimum flow area of ​​the regeneration channel 302 is smaller than the minimum flow area of ​​the softening channel 301.

[0092] In this embodiment, the softening channel 301 and the regeneration channel 302 are distributed on both sides of the water outlet channel 303 to achieve a reasonable layout and make full use of the space.

[0093] In some embodiments, the flow rate or velocity of the regeneration channel 302 can be controlled by existing valve assemblies so that the flow rate of brine within the resin layer meets the requirements.

[0094] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water softening device, characterized in that, include: A resin tank (10) having a resin cavity (11) for accommodating a resin layer; A water distribution assembly (20) is disposed in the resin cavity (11). The water distribution assembly (20) includes a central tube (21) and an upper water distributor (22). The upper water distributor (22) is located above the resin layer. A water valve (30) is installed on the top of the resin tank (10). The water valve (30) has a softening channel (301), a regeneration channel (302) and an outlet channel (303). The outlet channel (303) is connected to the central pipe (21). The water to be softened introduced through the softening channel (301) flows through the upper water distributor (22) into the resin layer. The brine introduced through the regeneration channel (302) flows through the upper water distributor (22) into the resin layer.

2. The water softening device according to claim 1, characterized in that, The upper water distributor (22) includes at least two layers of water distribution plates arranged from top to bottom. Water distribution plates are provided with water passage holes (220). The water to be softened flows through the M layers of the water distribution plates and then enters the resin layer. The brine flows through the N layers of the water distribution plates and then enters the resin layer. M is greater than 0 and less than N, and N is greater than or equal to 2.

3. The water softening device according to claim 2, characterized in that, The flow area of ​​the upper water distribution plate is smaller than that of the lower water distribution plate; and / or, the flow area of ​​the water passage (220) on each water distribution plate gradually decreases from top to bottom.

4. The water softening device according to claim 2, characterized in that, The water passage (220) is a circular hole or the water passage (220) extends in an arc shape around the axis of the water distribution plate.

5. The water softening device according to claim 2, characterized in that, The upper water distributor (22) includes two layers of water distribution plates arranged vertically, namely a first water distribution plate (221) and a second water distribution plate (222). The brine flows through the first water distribution plate (221) and the second water distribution plate (222) in sequence and then enters the resin layer. The water to be softened flows through the second water distribution plate (222) and then enters the resin layer.

6. The water softening device according to claim 5, characterized in that, The water softening device also includes an upper end cap (40), which includes a softening pipe (41), a regeneration pipe (42), and a water outlet pipe (43). The softening pipe (41), the regeneration pipe (42), and the water outlet pipe (43) are respectively connected to the softening channel (301), the regeneration channel (302), and the water outlet channel (303). The lower end of the softening pipe (41) passes through the first water distribution plate (221) and is located above the second water distribution plate (222). The lower end of the regeneration pipe (42) is located above the first water distribution plate (221).

7. The water softening device according to claim 1, characterized in that, The water valve (30) includes a valve chamber (31) and a water circuit switching component (32) disposed in the valve chamber (31). The water circuit switching component (32) is used to selectively open the softening channel (301) and the regeneration channel (302).

8. The water softening device according to claim 7, characterized in that, The water valve (30) has an inlet (304), an outlet (305), a brine inlet (306), and a drain outlet (307). When the softening channel (301) is connected to the inlet (304), the outlet channel (303) is connected to the outlet (305). When the regeneration channel (302) is connected to the brine inlet (306), the outlet channel (303) is connected to the drain outlet (307).

9. The water softening device according to claim 1, characterized in that, At least a portion of the regeneration channel (302) has a flow area smaller than that of the softening channel (301); and / or, the softening channel (301) and the regeneration channel (302) are distributed on both sides of the outlet channel (303).

10. The water softening device according to any one of claims 1-9, characterized in that, The water distribution assembly (20) also includes a lower water distributor (23), which is located at the bottom end of the central tube (21) and below the resin layer.

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