Reversing valve assembly of water softener

Abstract

The reversing valve assembly of the water softener comprises a valve shell and a valve element, a valve element cavity is formed in the valve shell, and a water inlet connector, a water outlet connector, a tank inlet connector, a tank outlet connector, a water supplementing connector and a flushing connector are arranged on the valve shell. The valve core is rotatably mounted in the valve core cavity, a driving shaft is arranged at the end part of the valve core, the driving shaft extends out of the valve shell and is used for being connected with a driving device, a plurality of water gaps and a plurality of branch valves arranged among the different water gaps are formed on the valve core, and the end parts of the branch valves are in contact with a guide surface in the valve shell and can realize communication or blocking of the different water gaps; along with the rotation of the valve core, each water port can be communicated with different interfaces, and water production, backwashing, regeneration, forward washing and water replenishing are realized. According to the reversing valve assembly of the water softener, the overall structure is redesigned and optimized, the structure is compact, the layout is reasonable, the overall size is greatly reduced, the space utilization rate is improved, the water softener can efficiently operate in a limited space, and the requirement of modern families for miniaturization is met.

Description

Technical Field

[0001] This utility model relates to a water softener, and more particularly to a water softener reversing valve assembly. Background Technology

[0002] In the current field of water treatment, hard water remains a significant challenge affecting both daily life and industrial production. Hard water, containing higher levels of soluble calcium and magnesium compounds, causes numerous inconveniences in daily life. For example, when used for washing, hard water reacts with detergents like soap to produce insoluble substances, reducing washing effectiveness and potentially leaving stains on clothing, thus shortening its lifespan. In the kitchen, hard water easily forms limescale on kettles, pots, and other cookware, making cleaning difficult and reducing heating efficiency, thus increasing energy consumption. Long-term consumption of hard water may also pose potential threats to human health.

[0003] As people become more aware of water safety, water softeners are gradually entering ordinary households. However, most water softeners on the market are medium to large-sized devices that take up a lot of space and have poor softening effects, making it impossible for many ordinary families to install them.

[0004] As the core component of a water softener, the size of the reversing valve assembly inside the water softener determines the overall size of the water softener. Most of the current water softener reversing valve assemblies adopt a split structure, which is complex and uses multiple independent control valves, resulting in an excessively large size. At the same time, it leads to high manufacturing and maintenance costs, which is not conducive to the miniaturization design of household water softeners. Utility Model Content

[0005] Technical problems to be solved

[0006] The technical problem to be solved by this utility model is to provide a water softener reversing valve assembly that is compact in structure, small in size, low in manufacturing cost, and has good applicability.

[0007] Technical solutions to the problem

[0008] This utility model provides a reversing valve assembly for a water softener, which includes:

[0009] The valve housing has a valve core cavity formed inside it, and the valve housing is provided with a water inlet 101, a water outlet 102, a tank inlet 103, a tank outlet 104, a water replenishment interface 401, and a flushing interface 402.

[0010] The valve core 2 is rotatably installed in the valve core cavity. One end of the valve core 2 is provided with a drive shaft 21. The valve core 2 is formed with a plurality of water inlets and a plurality of branch valves placed between different water inlets. The end of the branch valve contacts the guide surface in the valve housing and can realize the connection or blockage between different water inlets.

[0011] As the valve core 2 rotates, each of the water inlets can connect to different interfaces to achieve water production, backwashing, regeneration, forward washing, and water replenishment.

[0012] Furthermore, there are gaps between the two ends of the valve core 2 and the inner wall of the valve housing, forming two chambers respectively. The water inlet 101 and the water outlet 102 are respectively connected to the two chambers. The upper and lower ends of the valve core 2 are respectively provided with inlet and outlet. The tank inlet 103 and the tank outlet 104 are connected to the side wall of the valve core cavity.

[0013] Furthermore, the sidewall of the valve core 2 is sequentially provided with a first water inlet 203, a second water inlet 204, a third water inlet 205, a fourth water inlet 206, and a regeneration water inlet 207 along the rotation direction. An ejector 5 is installed inside the regeneration water inlet 207. The upper end of the third water inlet 205 extends through to the upper surface of the valve core 2 and connects to the water inlet 101. A first branch valve 7 is provided between the third water inlet 205 and the lower surface of the valve core 2. The lower end of the second water inlet 204 extends through to the... The lower bottom surface of the valve core 2 is connected to the water outlet 102; a second branch valve 6 is provided between the upper surface of the valve core 2 and the regeneration water outlet 207; the lower surface of the valve core 2 is provided with a drain hole I230 connected to the flushing interface 402 and a water inlet hole I220 coaxial with it and connected to the water inlet interface 401; the water inlet hole I220 is connected to the regeneration water outlet 207; and the drain hole I230 is connected to the first water outlet 203 and the fourth water outlet 206.

[0014] Furthermore, the lower surface of the valve core 2 is provided with a coaxial inner tube 23 and an outer tube 22. The drain hole I 230 is formed inside the inner tube 23, and the water inlet hole I 220 is formed between the inner tube 23 and the outer tube 22. The inner wall of the valve shell is provided with two coaxial holes that are respectively fitted to the inner tube 23 and the outer tube 22. The two holes are respectively connected to the water inlet port 401 and the flushing port 402.

[0015] Furthermore, the valve housing includes a housing 1 with open ends and an upper cover 3 and a lower cover 4 respectively installed at the two open ends of the housing 1. The housing 1 has an inner cylinder 12, and a valve core cavity 120 with open ends is formed inside the inner cylinder 12. The water inlet 101 and the water outlet 102 are respectively connected to the two ends of the valve core cavity 120. The two ends of the inner cylinder 12 have gaps with the upper cover 3 and the lower cover 4 to form a cavity. The water supply port 401 and the flushing port 402 are provided on the lower cover 4, and the guide surface is provided on the upper cover 3 and / or the lower cover 4.

[0016] Furthermore, the upper surface of the valve core 2 is provided with a second valve hole 208 communicating with the regenerated water inlet 207, and the second branch valve 6 is slidably fitted in the second valve hole 208, with its sliding direction parallel to the rotation axis of the valve core 2; a first valve hole 209 is provided between the third water inlet 205 and the lower surface of the valve core 2, and the first branch valve 7 is slidably fitted in the first valve hole 209, with its sliding direction parallel to the rotation axis of the valve core 2.

[0017] Furthermore, the station angle of the first water inlet 203 is 88°-94°, the station angle of the second water inlet 204 is 48°-54°, ​​the station angle of the third water inlet 205 is 65°-75°, the station angle of the fourth water inlet 206 is 88°-94°, the station angle of the regeneration water inlet 207 is 52°-58°, and the phase difference between the tank inlet 103 and the tank outlet 104 is 60°-75°.

[0018] Furthermore, during water production, the third water inlet 205 is connected to the tank inlet 103, the second water inlet 204 is connected to the tank outlet 104, and the first branch valve 7 and the second branch valve 6 are in the closed state.

[0019] During backwashing, the fourth water port 206 is connected to the tank inlet port 103, the third water port is connected to the tank outlet port 104, the first branch valve 7 is in the open state, and the second branch valve 6 is in the closed state.

[0020] During the washing process, the second water inlet 204 and the third water inlet 205 are simultaneously connected to the tank inlet 103, the first water inlet 203 is connected to the tank outlet 104, and the first branch valve 7 and the second branch valve 6 are in the closed state.

[0021] During regeneration, the first water inlet 203 is connected to the tank inlet 103, the regeneration water inlet 207 is connected to the tank outlet 104, and the first branch valve 7 and the second branch valve 6 are in the open state.

[0022] When water is added, the second water inlet 204 is connected to the tank inlet 103, the first water inlet 203 is connected to the tank outlet 104, and the first branch valve 7 and the second branch valve 6 are in the open state.

[0023] Furthermore, the regenerated water inlet 207 is a circular hole with its axis perpendicular to the rotation axis of the valve core 2. The inner wall of the regenerated water inlet 207 is provided with an internal thread for installing the jet injector. The side wall of the brine suction area of ​​the jet injector in the regenerated water inlet 207 is connected to the water supply hole I 220, and the second valve hole 208 is connected to the end of the regenerated water inlet 207.

[0024] Furthermore, the jet injector 5 includes a first valve core section 51a and a second valve core section 51b coaxially arranged and interconnected. There is a gap between the first valve core section 51a and the second valve core section 51b, forming a brine absorption zone. The water replenishment hole I220 is located within the brine absorption zone. Both ends of the first valve core section 51a have liquid inlet holes, and the liquid inlet end of the liquid inlet hole is conical. Both ends of the second valve core section 51b have liquid outlet holes coaxial with the liquid inlet holes, and the outlet end of the liquid outlet hole is flared to form a diffusion zone. The sidewall of the first valve core section 51a or the second valve core section 51b is provided with external threads, and the end of the first valve core section 51a or the second valve core section 51b is provided with an operating hole 520 for driving its rotation to install it into the valve hole.

[0025] Beneficial effects

[0026] This utility model relates to a reversing valve assembly for a water softener. The valve body structure is optimized and improved by concentrating the water inlets on the valve core and controlling them through branch valves. This results in a more rational layout of the interfaces, significantly reducing the number of parts, improving the structural compactness of the reversing valve, increasing space utilization, and reducing volume, thus contributing to the miniaturization of the valve body and the water softener. The use of a gap structure to form the flow channel and serve as the inlet and outlet simplifies water circuit connections, reduces manufacturing costs, and ensures good operational reliability. The placement of the water inlet and outlet on the lower cover optimizes the pipeline layout, reduces manufacturing difficulty and costs, and facilitates overall assembly. The guide surfaces are distributed on the upper and lower covers, improving structural compactness and reducing the overall structural volume, which is beneficial for the miniaturization of the water softener. The orientation of each interface is designed to facilitate the overall assembly of the valve body and pipeline connection, making disassembly convenient and facilitating daily maintenance. Integrating the water inlet and valve hole into a single valve core body results in a compact structure and small size, ensuring precise switching between different operating positions. This water softener boasts a long service life and optimized overall performance, while also facilitating a miniaturized design. The integrated valve core reduces connecting parts, lowers leakage risk, and improves system reliability and stability. It also simplifies installation and maintenance, enhancing efficiency and user experience. The multi-station design allows for flexible switching between stations, reducing operational complexity and further improving overall performance and durability. The redesigned integrated valve core optimizes inlet distribution, increases space utilization, and creates a compact structure, reducing overall volume and contributing to miniaturization and weight reduction. This new water softener reversing valve assembly features a redesigned and optimized overall structure, resulting in a compact and rationally laid-out design that significantly reduces overall size and improves space utilization. This allows the water softener to operate efficiently within limited space, meeting the modern family's demand for miniaturized and intelligent appliances and improving users' quality of life. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the reversing valve assembly of the water softener of this utility model;

[0028] Figure 2 This is a schematic diagram of the reversing valve assembly of the water softener of this utility model from another angle;

[0029] Figure 3 This is a cross-sectional view of the reversing valve assembly of the water softener of this utility model;

[0030] Figure 4 This is a longitudinal sectional view of the reversing valve assembly of the water softener of this utility model;

[0031] Figure 5 This is an exploded structural diagram of the reversing valve assembly of the water softener of this utility model;

[0032] Figure 6 This is a schematic diagram showing the installation of the branch valves and ejector of the reversing valve assembly for the water softener of this utility model;

[0033] Figure 7 This is a cross-sectional view of the valve housing of the reversing valve assembly of the water softener of this utility model;

[0034] Figure 8 This is another planar sectional view of the valve housing of the reversing valve assembly of the water softener of this utility model;

[0035] Figure 9 This is a schematic diagram of the valve core of the reversing valve assembly for the water softener of this utility model;

[0036] Figure 10 This is a transverse sectional view of the valve core of the reversing valve assembly of the water softener of this utility model;

[0037] Figure 11 This is a first longitudinal sectional view of the valve core of the reversing valve assembly of the water softener of this utility model;

[0038] Figure 12 This is a second longitudinal sectional view of the valve core of the reversing valve assembly of the water softener of this utility model;

[0039] Figure 13 This is a third longitudinal sectional view of the valve core of the reversing valve assembly of the water softener of this utility model;

[0040] Figure 14 This is a fourth longitudinal sectional view of the valve core of the reversing valve assembly of the water softener of this utility model;

[0041] Figure 15 This is a schematic diagram of the ejector structure of the reversing valve assembly of the water softener of this utility model;

[0042] Figure 16 This is a cross-sectional view of the ejector of the reversing valve assembly of the water softener of this utility model;

[0043] Figure 17 This is a schematic diagram of the installation of the second branch valve of the reversing valve assembly of the water softener of this utility model;

[0044] Figure 18 for Figure 17 Enlarged view of section A in the middle;

[0045] Figure 19 This is a schematic diagram of the installation of the first branch valve of the reversing valve assembly of the water softener of this utility model;

[0046] Figure 20 for Figure 19 Enlarged view of section B in the middle;

[0047] Figure 21 This is a schematic diagram of the upper cover of the reversing valve assembly of the water softener of this utility model;

[0048] Figure 22 This is a schematic diagram of the lower cover of the reversing valve assembly of the water softener of this utility model;

[0049] Figure 23 This is a schematic diagram of the water flow direction during water production in the reversing valve assembly of the water softener of this utility model;

[0050] Figure 24 This is a schematic diagram of the water flow direction during backwashing of the reversing valve assembly of the water softener of this utility model;

[0051] Figure 25 This is a schematic diagram of the water flow direction during forward rinsing of the reversing valve assembly of the water softener of this utility model;

[0052] Figure 26 This is a schematic diagram of the water flow direction during regeneration of the reversing valve assembly of the water softener of this utility model;

[0053] Figure 27 This is a schematic diagram showing the water flow direction when the reversing valve assembly of the water softener of this utility model is replenished.

[0054] In the diagram: 1. Shell; 12. Inner cylinder; 101. Water inlet; 102. Water outlet; 103. Tank inlet; 104. Tank outlet; 111. Screw hole; 120. Valve core cavity; 1010. First gap; 1020. Second gap; 1030. First connecting hole; 1040. Second connecting hole; 2. Valve core; 2a. Second working surface; 2b. Third working surface; 21. Drive shaft; 22. Outer tube; 23. Inner tube; 201. Water inlet; 202. Water outlet; 203. First water inlet; 204. Second water inlet; 20 5. Third water inlet; 206. Fourth water inlet; 207. Regeneration water inlet; 208. Second valve hole; 209. First valve hole; 231. Second connecting hole; 2201. Connecting hole; 2071. Flow channel hole; 3. Upper cover; 33. Fourth annular body; 35a. Second guide surface; 4. Lower cover; 45. Third annular body; 46a. First guide surface; 401. Water supply interface; 402. Drainage interface; 5. Ejector; 51a. First valve core section; 51b. Second valve core section; 520. Operating hole; 6. Second branch valve; 7. First branch valve. Detailed Implementation

[0055] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0056] See Figures 1-23 This utility model provides a reversing valve assembly for a water softener, comprising a valve housing and a valve core 2. The valve housing serves as the mounting carrier, and a valve core cavity is formed within the valve housing. The valve housing is provided with an inlet port 101, an outlet port 102, a tank inlet port 103, a tank outlet port 104, a water replenishment port 401, and a flushing port 402. The inlet port 101 is connected to the inlet end, the outlet port 102 is connected to the outlet end, the tank inlet port 103 is connected to the inlet end of the resin tank, the tank outlet port 104 is connected to the outlet end of the resin tank, the water replenishment port 401 is connected to the brine valve, and the flushing port 402 is used for... The valve core 2 is rotatably installed in the valve core cavity. A drive shaft 21 is provided at one end of the valve core 2, which is used to connect to a drive device and serve as the power end for the rotation of the valve core 2. Several water inlets and several branch valves are formed on the valve core 2 and arranged between different water inlets. The end of the branch valve contacts the guide surface in the valve housing. The guide surface is an undulating curved surface. By rotating the valve core 2, the guide surface can drive the branch valve to move axially, realizing the connection or blockage between different water inlets. At the same time, with the rotation of the valve core 2, each water inlet can connect with different interfaces, thereby realizing water production, backwashing, regeneration, forward washing and water replenishment.

[0057] In this application, there are gaps between the two ends of the valve core 2 and the inner wall of the valve housing, forming two chambers respectively. The water inlet 101 and the water outlet 102 are respectively connected to the two chambers. The upper and lower ends of the valve core 2 are respectively provided with inlet and outlet, which are respectively connected to the two chambers, serving as the water inlet and water outlet of the valve core 2. Since the inlet and outlet ends of the valve core 2 are located at the ends of the valve core, no matter how the valve core 2 is rotated to any angle, its two ends are always connected to the water inlet 101 and the water outlet 102. The tank inlet 103 and the tank outlet 104 are connected to the side wall of the valve core cavity, which are located on the same radial plane and on different axial planes.

[0058] In this application, the sidewall of the valve core 2 is sequentially provided with a first water inlet 203, a second water inlet 204, a third water inlet 205, a fourth water inlet 206, and a regeneration water inlet 207 along the rotation direction (radial direction). An ejector 5 is installed inside the regeneration water inlet 207, which is mainly used to generate negative pressure through jetting for salt absorption in regeneration mode. The upper end of the third water inlet 205 extends through to the upper surface of the valve core 2 and connects to the water inlet interface 101, serving as the water inlet of the valve core. A first branch valve 7 is provided between the third water inlet 205 and the lower surface of the valve core 2. Through this first branch valve 7, communication or blockage between the third water inlet 205 and the lower surface of the valve core can be achieved. The lower surface of the valve core is the outlet end of the valve core. The lower end of the second water port 204 extends to the bottom surface of the valve core and connects with the outlet interface 102. As the outlet end of the valve core, the axial movement of the first branch valve 7 can achieve the connection or blockage between the third water port 205 and the outlet end of the valve core. A second branch valve 6 is provided between the upper surface of the valve core 2 and the regeneration water port 207. The axial movement of the second branch valve 6 can achieve the connection or blockage between the upper surface of the valve core and the regeneration water port 207. The upper surface of the valve core is the inlet end. Therefore, the second branch valve 6 can achieve the connection or blockage between the regeneration water port 207 and the inlet end.

[0059] A drain hole I230 communicating with the flushing interface 402 and a water inlet hole I220 coaxial with and communicating with the water inlet interface 401 are provided at the center of the lower surface of the valve core 2. The water inlet hole I220 is connected to the regeneration water inlet 207, and the drain hole I230 is connected to the first water inlet 203 and the fourth water inlet 206. Specifically, a coaxial inner tube 23 and an outer tube 22 are provided at the center of the lower surface of the valve core 2. The drain hole I230 is formed inside the inner tube 23, and the inner tube 23 and the outer tube 22 are connected. A water inlet hole 220Ⅰ is formed between them; at the same time, two sets of holes are provided on the inner wall of the valve body, which are coaxial and respectively connected to the inner tube body 23 and the outer tube body 22. The two sets of holes are respectively connected to the water inlet interface 401 and the flushing interface 402. The two sets of holes respectively form a water inlet hole Ⅱ and a drain hole Ⅱ. The water inlet hole Ⅱ is always connected to the water inlet hole Ⅰ, and the drain hole Ⅱ is always connected to the drain hole Ⅰ. Meanwhile, the inner and outer tube bodies and the two sets of holes serve as the rotation center of the valve core 2, as the central axis, for operational stability and reliability.

[0060] The valve housing includes a housing 1 with open ends and an upper cover 3 and a lower cover 4 respectively installed at the two open ends of the housing 1. An inner cylinder 12 is provided inside the housing 1, and a valve core cavity 120 with open ends is formed inside the inner cylinder 12. The water inlet 101 and the water outlet 102 are respectively connected to the two ends of the valve core cavity 120, serving as the water inlet and outlet ends of the valve core. There are gaps between the two ends of the inner cylinder 12 and the upper cover 3 and the lower cover 4, forming chambers. The two chambers are respectively connected to the water inlet 101 and the water outlet 102. The water replenishment port 401 and the flushing port 402 are provided on the lower cover 4. The guide surface is provided on the upper cover 3 and / or the lower cover 4. In this application, the upper cover 3 and the lower cover 4 are both provided with guide surfaces. The two guide surfaces are respectively in contact with the ends of the first branch valve and the second branch valve, and are used to control the opening or closing of the first branch valve and the second branch valve, forming different passages.

[0061] The rotation of the valve core enables the reversing valve assembly to perform water production, backwashing, regeneration, forward washing, and water replenishment functions.

[0062] During water production, the third water inlet 205 is connected to the tank inlet 103, the second water inlet 204 is connected to the tank outlet 104, and both the first branch valve 7 and the second branch valve 6 are in the closed state.

[0063] During backwashing, the fourth water port 206 is connected to the tank inlet port 103, and the third water port is connected to the tank outlet port 104. The first branch valve 7 is in the open state, while the second branch valve 6 is in the closed state.

[0064] During the washing process, the second water inlet 204 and the third water inlet 205 are simultaneously connected to the tank inlet 103, the first water inlet 203 is connected to the tank outlet 104, and both the first branch valve 7 and the second branch valve 6 are in the closed state.

[0065] During regeneration, the first water inlet 203 is connected to the tank inlet 103, the regeneration water inlet 207 is connected to the tank outlet 104, and both the first branch valve 7 and the second branch valve 6 are in the open state.

[0066] When replenishing water, the second water inlet 204 is connected to the tank inlet 103, the first water inlet 203 is connected to the tank outlet 104, and both the first branch valve 7 and the second branch valve 6 are in the open state.

[0067] The structure of the valve body and valve core is described in detail below:

[0068] See Figures 1-8 , Figure 22 and Figure 23A valve core cavity 120 is formed inside the valve housing for installing the valve core. The valve core is cylindrical and can rotate radially, thereby enabling switching between different water inlets. Therefore, the valve core cavity 120 is also cylindrical. Two water inlets and two resin tank interfaces are provided on the side wall of the valve housing. The two water inlets are connected to both ends of the valve core cavity 120 to realize water inlet and outlet. The two resin tank interfaces are connected to the inlet and outlet ends of the resin tank, respectively, thereby realizing functions such as soft water production and regeneration, and are connected to the side wall of the valve core cavity. At the same time, the two resin tank interfaces are located on different radial planes, that is, they have a phase difference. In this application, the phase difference between the two resin tank interfaces is 60°-75°, which is conducive to the rational arrangement of the water inlets of the valve core, improves space utilization, and realizes miniaturization design.

[0069] A drain hole II and a water supply hole II are provided at the lower end of the valve core cavity 120. The drain hole II and the water supply hole II are coaxial with the valve core cavity. Therefore, at least one of them is an annular hole. In this embodiment, the drain hole II is a circular hole and the water supply hole II is an annular hole. At the same time, a drain interface 402 and a water supply interface 401 are provided at the bottom of the valve body. The drain interface 402 is connected to the drain hole II, and the water supply interface 401 is connected to the water supply hole II, thereby forming six different interfaces. By rotating the valve core, the switching between the interfaces can be realized to form different working modes.

[0070] A guide surface is provided at the upper or lower end of the valve core cavity 120. The guide surface is annular, and its end face serves as a working surface. It is used to contact the end of the branch valve on the valve core, guide the branch valve to move axially, and realize opening or closing. This enables the water outlets on the valve core to be connected or blocked, and realizes the connection control between different flow channels. A shaft hole is provided at the top of the valve body. The shaft hole is connected to the valve core cavity 120 and is coaxial with the valve core cavity 120. It is used to allow the drive shaft 21 on the valve core to pass through, and to drive the valve core 2 in the valve body.

[0071] In this application, the valve housing includes a housing 1, an upper cover 3, and a lower cover 4. The housing 1 has a mounting cavity formed inside. In this embodiment, the housing includes a cylindrical outer housing. A cylindrical mounting cavity with open ends is formed inside the outer housing. An inner cylinder 12 is provided inside the mounting cavity. The inner cylinder 12 is cylindrical and coaxial with the housing 1. A valve core cavity 120 is formed inside the inner cylinder 12. The valve core cavity 120 is cylindrical and coaxial with the housing 1. Its two ends are open. The upper end of the inner cylinder 12 is lower than the upper end of the housing 1, and the lower end of the inner cylinder 12 is higher than the lower end of the housing 1. That is, both ends of the inner cylinder 12 are shorter than the lengths of both ends of the housing, so that both ends of the inner cylinder 12 are located inside the two ends of the mounting cavity.

[0072] The water inlet in this application includes an inlet port 101 and an outlet port 102. The inlet port 101 is connected to the upper end of the valve core cavity 120 but not to the lower end of the valve core cavity. The outlet port 102 is connected to the lower end of the valve core cavity 120 but not to the upper end of the valve core cavity. Specifically, the inlet port 101 is connected to the upper end of the valve core cavity 120 through a first gap 1010, which is the gap between the upper end of the valve core cavity (inner cylinder) and the upper cover. The outlet port 102 is connected to the lower end of the valve core cavity 120 through a second gap 1020, which is the gap between the lower end of the valve core cavity 120 (inner cylinder 12) and the lower cover 4.

[0073] The resin tank interface includes an inlet port 103 and an outlet port 104, both of which communicate with the inner wall of the valve core cavity. The points of communication with the valve core cavity 120 are located on different axial planes of the valve core cavity. In this application, the two points of communication are located on the same radial plane, with a certain phase difference between them. That is, the valve core must rotate a certain angle to reach the outlet port 104 from the inlet port 103, thus achieving switching between different water paths. In this embodiment, the center of the valve core cavity 120 is taken as the center of a circle, and the inlet port 103 and outlet port... The phase difference (central angle) between 104 is 60°-75°; in this application, a first connecting hole 1030 and a second connecting hole 1040 are provided on the side wall of the valve core cavity 120, wherein the first connecting hole 1030 is connected to the inlet port 103, serving as the connection point between the inlet port 103 and the valve core cavity, and the second connecting hole 1040 is connected to the outlet port 104, serving as the connection point between the outlet port 104 and the valve core cavity 120, and the aforementioned phase difference is the angle difference between the first connecting hole and the second connecting hole.

[0074] To improve structural compactness and facilitate assembly, in this application, the two sprue ports and the two resin tank interfaces are parallel to each other, with the two sprue ports located on one side of the housing and the two resin tank interfaces located on the other side of the housing.

[0075] The upper cover 3 is sealed and installed at the upper open end of the housing (installation cavity), and the lower cover 4 is sealed and installed at the lower open end of the housing (installation cavity), forming a sealed cavity. The valve core cavity 120 is located in the sealed cavity. The two ends of the valve core cavity 120 are open. Since its ends are shorter than the axial length of the installation cavity, there are gaps between the two ends of the valve core cavity 120 and the upper cover 3 and the lower cover 4, which allows water to flow through and form a flow channel. The drain hole II and the water supply hole II are provided on the lower cover 4, and the shaft hole is provided on the upper cover 3.

[0076] Both the upper cover 3 and the lower cover 4 include a cover plate. At the end (end face) of the cover plate, there is an annular protrusion with the same cross-sectional shape as the mounting cavity. The annular protrusion can fit into the mounting cavity of the housing, and its outer wall fits against the inner wall of the mounting cavity, thereby achieving coaxial positioning. At the same time, there are corresponding positioning protrusions and positioning grooves between the cover plate and the housing, which can cooperate with each other to achieve radial positioning between the cover plate and the housing. A sealing ring is provided between the annular protrusion and the open end of the housing 1, thereby forming a sealed chamber in the mounting cavity. At the same time, mounting holes are provided on the edges of the upper cover 3 and the lower cover 4, and corresponding screw holes 111 are provided on the two open ends of the housing. The upper cover 3 and the lower cover 4 are fixed to the two ends of the housing by bolts to form a valve shell.

[0077] Specifically, the upper cover 3 includes a circular upper cover plate with multiple first mounting holes evenly distributed around its circumferential edge, serving as connecting components. A first annular protrusion is provided at the lower end of the upper cover plate. The outer diameter of the first annular protrusion is the same as the inner diameter of the mounting cavity, allowing it to be inserted into the upper open end of the mounting cavity for coaxial positioning. To facilitate rapid insertion, a chamfer can be provided at the end of the first annular protrusion or the upper open end of the mounting cavity to form an inclined guide surface, thereby improving assembly efficiency. A first sealing ring mounting groove is provided on the outer wall of the first annular protrusion; this first sealing ring mounting groove is an annular groove.

[0078] A fourth annular body and a fifth annular body are coaxially arranged at the center of the lower surface of the upper cover 3. The shaft hole is located at the center of the fourth annular body 33, and the inner wall of the fourth annular body 33 serves as the rotation fulcrum of the valve core shaft to improve the smoothness of the valve core rotation and the running accuracy. A downward-facing second guide surface 35a is provided between the fourth annular body 33 and the fifth annular body. The second guide surface 35a is annular, and its lower end face serves as the working surface. It has a certain degree of undulation to guide the axial movement of the second branch valve 6 on the valve core, so as to realize the opening or closing of the second branch valve 6.

[0079] The lower cover 4 includes a circular lower cover plate with multiple second mounting holes evenly distributed along its circumferential edge, serving as connectors to the housing. A second annular protrusion is provided at the upper end of the lower cover plate. The outer diameter of the second annular protrusion is the same as the inner diameter of the mounting cavity, allowing it to be inserted into the lower open end of the mounting cavity for coaxial positioning. To facilitate rapid insertion, a chamfer can be provided at the end of the second annular protrusion or the end of the lower open end of the mounting cavity to form an inclined guide surface, thereby improving assembly efficiency. A second sealing ring mounting groove is provided on the outer wall of the second annular protrusion for mounting a sealing ring; this second sealing ring mounting groove is an annular groove structure.

[0080] Meanwhile, a first annular body and a second annular body are coaxially arranged at the center of the upper surface of the lower cover 4. A drain hole I is formed in the first annular body. The drain hole I is a circular hole. A water supply hole II 44 is formed between the first annular body and the second annular body. The water supply hole II 44 is a circular hole. It is used to connect with the circular tube at the lower end of the valve core to realize the pipeline connection. Specifically, the water supply hole II connects to the water supply hole I, and the drain hole II connects to the drain hole I. A drain pipe and a water supply pipe are provided at the lower end of the lower cover 4. The drain pipe is connected to the drain hole II, and the water supply pipe is connected to the water supply hole II 44.

[0081] Meanwhile, the aforementioned first or second annular body is connected to the flow channel at the lower end of the valve core, achieving pipeline connection while also serving as a fulcrum for the valve core's rotation, thus improving the valve core's operational stability.

[0082] To facilitate assembly and connection, in this application, the water supply pipe and the drain pipe are coaxially arranged, both perpendicular to and intersecting the axis of the lower cover 4, and their length direction is parallel to the direction of the inlet (outlet) water inlet, which facilitates assembly inside the water softener. The water supply interface is set on the water supply pipe, and the drain interface is set on the drain pipe.

[0083] Meanwhile, a third annular body 45 is provided on the upper surface of the lower cover 4. The third annular body 45 is coaxial with the second annular body and located outside the second annular body. An upward-facing first guide surface 46a is provided between the second annular body and the third annular body 45. The upper end surface of the first guide surface 46a serves as a working surface and has a certain degree of undulation. It is used to guide the axial movement of the first branch valve 7 on the valve core, thereby realizing the opening or closing of the first branch valve 7.

[0084] See Figures 9-14 The valve core 2 has a cylindrical structure. A drive shaft 21 is provided at the upper end of the valve core 2. The drive shaft 21 is coaxial with the valve core 2 and has a connecting part at its end for connecting with the drive device, thereby driving the valve core to rotate and realize the switching of each station. In this application, the connecting part is a spline.

[0085] The sidewall of the valve core 2 serves as the first working surface. On this first working surface, a first water inlet 203, a second water inlet 204, a third water inlet 205, a fourth water inlet 206, and a regeneration water inlet 207 are sequentially arranged along the rotational (radial) direction. The regeneration water inlet 207 is used to install an ejector 5, which is a salt suction device to achieve salt suction. In this application, the regeneration water inlet 207 is a circular hole with its axis perpendicular to the axis of the valve core. Preferably, the axis of the regeneration water inlet 207 is perpendicular to and intersects with the axis of the valve core. At the same time, an internal thread is provided on the inner wall of the regeneration water inlet 207 for installing and fixing the ejector. In this application, the internal thread is provided at the open end of the regeneration water inlet 207.

[0086] The aforementioned rotation direction can be left or right, referring to the radial direction of the first working surface where each water inlet is sequentially installed.

[0087] The upper surface of the valve core 2 serves as the second working surface 2a, which is the water inlet end (surface). The second working surface 2a is provided with a water inlet 201 and a second valve hole 208. The second valve hole 208 is a circular hole with its axis parallel to the axis of the valve core. The side wall of the second valve hole 208 is connected to the regeneration water inlet 207, which is used to install the first branch valve 6, thereby enabling the regeneration water inlet 207 to connect or block the second valve hole (second working surface). In this application, the end of the regeneration water inlet 207 is connected to the side wall of the second valve hole 208 through the flow channel hole 2071. The water inlet 201 is connected to the third water inlet 205, serving as the main water inlet (end) of the valve core. In this embodiment, the upper end of the third water inlet 205 extends through to the top surface of the valve core, that is, the upper end of the third water inlet 205 is open, forming a water inlet, which serves as the water inlet end.

[0088] In order to achieve a reasonable layout of the valve core, improve structural compactness and reduce volume, in this application, the second valve hole 208 is provided at the end of the regenerated water inlet 207, which can reduce the space (angle) occupied by the second valve hole 208 and improve structural compactness.

[0089] The lower surface of the valve core serves as the third working surface, which is also the water outlet. A water outlet 202 and a first valve hole 209 are provided on the third working surface. The water outlet 202 is connected to the second water outlet and serves as the main water outlet for outputting soft water. In this embodiment, the lower end of the second water outlet extends through to the bottom surface of the valve core, forming the water outlet 202, which is the water outlet. The first valve hole 209 is a circular hole with its axis parallel to the valve core body axis. The first valve hole 209 is connected to the third water outlet 205 and is used to install a first branch valve 7. The first branch valve 7 is used to control the connection or disconnection between the third working surface and the third water outlet.

[0090] Meanwhile, a drain hole I230 and a water supply hole I220 are provided at the center of the third working surface. The drain hole I230 is a downward-facing central hole, coaxial with the valve core. The water supply hole I220 is annular, located outside the drain hole I230, and coaxial with the valve core. The water supply hole I220 communicates with the regeneration water inlet 207. Specifically, a connecting hole 2201 is provided at the top of the water supply hole I220. This connecting hole 2201 is located directly below the regeneration water inlet 207 and communicates with it. 2201 serves as the brine inlet, allowing it to enter the regenerated water inlet under negative pressure. Therefore, the diameter of this connection hole 2201 is relatively small. Meanwhile, the drain hole I 230, the first water inlet 203, and the fourth water inlet 206 are interconnected. Specifically, a second connection hole 231 is provided at the top of the drain hole I 230. The end of the second connection hole 231 extends to both sides and connects to the first water inlet 203 and the fourth water inlet 206 respectively, thus achieving interconnection among the three. The diameter of the second connection hole 231 is relatively small and is used to discharge the flushing wastewater.

[0091] To facilitate assembly and rotational installation, in this application, an inner tube 23 and an outer tube 22 are provided at the center of the third working surface 2b. The inner tube 23 is coaxial with the valve core, and the outer tube 22 is also coaxial with the valve core. Its diameter is larger than that of the inner tube 23 and it is located outside the inner tube. There is a gap between the outer wall of the inner tube 23 and the inner wall of the outer tube 22 to form an annular channel, forming a water inlet hole I220. A drain hole I230 is formed inside the inner tube. After assembly, the inner tube and the outer tube can serve as rotational support components, improving the stability of operation and ensuring its rotational accuracy.

[0092] To facilitate assembly and improve stability, the outer walls of the inner tube 23 and the outer tube 22 are provided with downward-facing stepped surfaces. These stepped surfaces are used to mate with the holes on the valve cover and facilitate the installation of sealing rings, thereby improving sealing performance and ensuring stable operation of the valve body. Furthermore, the lower end face of the inner tube 23 is higher than the lower end face of the outer tube 22, which facilitates structural compactness and, consequently, the compact design of the lower cover, reducing the overall thickness.

[0093] To further reduce the volume, especially the thickness, of the directional control valve, in this application, the upper surface of the valve core body is concave downward to form a second annular working surface, while the lower surface of the valve core body is concave upward to form a third annular working surface. This helps to reduce the overall thickness of the directional control valve and improve the structural compactness.

[0094] Sealing grooves are provided between the second working face and the first working face, between the third working face and the first working face, and between each water inlet (including the regeneration water inlet) on the first working face. These grooves are used to install seals and ensure the sealing between the water inlets (including the regeneration water inlets) on each working face. The design of the sealing grooves not only improves the overall sealing effect but also facilitates daily maintenance and replacement, extending the service life of the equipment.

[0095] Specifically, multiple sealing ring mounting grooves are provided on the side wall of the valve core body. These multiple sealing ring mounting grooves divide the first working surface into five work positions. The first water inlet 203, the second water inlet 204, the third water inlet 205, the fourth water inlet 206, and the regeneration water inlet 207 are sequentially arranged on each work position.

[0096] In this application, the five workstations mentioned above are sequentially arranged along the rotation direction as a first workstation, a second workstation, a third workstation, a fourth workstation, and a fifth workstation. Each workstation is provided with a corresponding sealing ring mounting groove to ensure the sealing performance between each workstation. The first water inlet 203 is located at the first workstation, the second water inlet 204 is located at the second workstation, the third water inlet 205 is located at the third workstation, the fourth water inlet 206 is located at the fourth workstation, and the regeneration water inlet 207 is located at the fifth workstation.

[0097] In this embodiment, the station angle of the first water inlet 203 is 88°-94°, the station angle of the second water inlet 204 is 48°-54°, ​​the station angle of the third water inlet 205 is 65°-75°, the station angle of the fourth water inlet 206 is 88°-94°, and the station angle of the regeneration water inlet is 52°-58°. This allows the water inlets to be reasonably arranged between the inlets and outlets of the valve body after assembly, and enables the switching of connection and disconnection between the ports.

[0098] Meanwhile, in order to facilitate assembly and quickly determine the installation angle of the valve core, and to facilitate daily maintenance and upkeep, this application provides one or more positioning protrusions on the second working surface to quickly determine the angle of the valve core body.

[0099] See Figures 15-16The ejector 5, used for brine suction in regeneration mode, consists of a first valve core section 51a and a second valve core section 51b. Both the first and second valve core sections 51a and 51b are cylindrical, with the same outer diameter and coaxially arranged. The first and second valve core sections 51a and 51b are interconnected to form a single unit. A gap exists between the first and second valve core sections 51a and 51b, forming a brine suction zone. This zone is used to generate negative pressure and attract brine. The brine absorption zone is connected to the water supply hole. Inlet holes are penetrating both ends of the first valve core section 51a. These inlet holes are central holes, meaning they are coaxial with the first valve core section 51a. The inlet end of the inlet hole is conical. Specifically, the inlet hole includes inlet hole I 502, with its inlet end flared (diameter increased) to form a conical inlet hole II 501. In other words, inlet hole II 501 has a conical structure with a large inlet end and a small outlet end, extending from the inlet direction towards the outlet. From the perspective of direction, it has a constricted structure, which helps guide the fluid smoothly into the inlet hole I, thereby increasing the flow rate. At both ends of the second valve core section 51b, there are outlet holes, which are coaxial with the inlet holes. Liquid discharged from the inlet holes enters the outlet holes at high speed. The outlet end of the outlet hole is widened (diameter increased) to form a diffusion zone. Specifically, the outlet hole includes outlet hole I 503 facing the inlet hole. The diameter of outlet hole I 503 is larger than the diameter of inlet hole I 502. The outlet end of outlet hole I 503 is widened (diameter increased) to form a conical outlet hole II 504. This outlet hole II serves as a diffusion zone. The conical structure of outlet hole II 504 helps the liquid diffuse rapidly, forming a Venturi effect, achieving efficient absorption and uniform distribution of brine, improving brine absorption efficiency, and ensuring stable operation of the water softener. Furthermore, in this application, the diameter at the end of the diffusion zone is larger than the end diameter of inlet hole II 501, resulting in a better diffusion effect.

[0100] External threads are provided on the side wall of the first valve core section 51a or the second valve core section 51b. At the same time, an operating hole 520 is provided at the end of the first valve core section 51a or the second valve core section 51b, which is used to drive the valve core to rotate by a tool and then fix it into the valve hole of the valve body. The design of the operating hole 520 facilitates installation and maintenance. In this application, the operating hole 520 is a regular polygonal hole, which can be a cross structure or a hexagonal hole, which facilitates operation with standard tools and facilitates assembly and daily maintenance.

[0101] A second valve hole 208 is provided on the upper end face of the valve core 2. The second valve hole 208 is a circular hole with its axis parallel to the rotation axis of the valve core 2. At the same time, a flow channel hole 2071 is provided on the side wall of the second valve hole 208. The flow channel hole 2071 is connected to the end of the regeneration water inlet 207. A second branch valve 6 is provided in the second valve hole 208. The second branch valve 6 can slide axially, and its sliding direction is parallel to the axis of the valve core 2. At the same time, an elastic component is provided in the second valve hole 208. The elastic component gives the branch valve 6 an outward movement tendency. A sealing ring is provided on the side wall of the second branch valve. By moving up and down, the flow channel hole 2071 can be opened or closed, realizing the connection or blockage between the regeneration water inlet and the upper surface of the valve core (i.e., the water inlet end).

[0102] A first valve hole 209 is provided in the third water inlet, and a first branch valve 7 is installed in the first valve hole. The first branch valve 7 can slide axially, and its sliding direction is parallel to the rotation axis of the valve core 2. At the same time, an elastic component is provided on the valve core. The elastic component makes the first branch valve 7 have a downward movement tendency, so that its end is in contact with the guide surface. A sealing gasket is provided at the end of the first branch valve. By the axial movement of the first branch valve, the sealing gasket is opened or closed, realizing the connection or blockage between the fourth water inlet and the lower end face of the valve core (i.e., the water outlet).

[0103] The following describes the working method of the reversing valve assembly in this application:

[0104] A drive device drives the valve core 2 to rotate, thereby switching between different working modes, including water production mode, backwash mode, forward wash mode, regeneration mode and water replenishment mode.

[0105] See Figure 23 In water production mode, the third water inlet 205 is connected to the inlet port 103, the second water inlet 204 is connected to the outlet port 104, and the first branch valve 7 and the second branch valve 6 are in the closed state. At this time, the water entering through the inlet port 101 enters the third water inlet 205 through the inlet on the top surface of the valve core, and then enters the second water inlet 204 in sequence through the inlet port 103, the resin tank, and the outlet port 104, and enters the outlet port 102 from the outlet at the lower end of the second water inlet 204, thus realizing water production.

[0106] See Figure 24In backwash mode, the fourth water inlet 206 is connected to the inlet port 103, and the third water inlet 205 is connected to the outlet port 104. The first branch valve 7 is in the open state, and the second branch valve 6 is in the closed state. At this time, the water entering through the inlet port 101 enters the third water inlet 205 through the inlet on the top surface of the valve core. The water in the third water inlet 205 is divided into two branches. One branch enters the bottom surface of the valve core through the first branch valve 7 and enters the outlet port 102. The other branch enters the fourth water inlet 206 after passing through the outlet port 104, the resin tank, and the inlet port 103. Since the fourth water inlet is connected to the drain hole, the water is discharged from the flushing port 402 after passing through the drain hole I220 at the lower end of the valve core. In backwash mode, the opening of the first branch valve 7 ensures normal water use during backwash.

[0107] See Figure 25 In the forward wash mode, the second water inlet 204 and the third water inlet 205 are simultaneously connected to the inlet port 103, and the first water inlet 203 is connected to the outlet port 104. The first branch valve 7 and the second branch valve 6 are in the closed state. At this time, the water entering through the inlet port 101 enters the third water inlet 205 and the inlet port 103 in sequence after passing through the inlet on the top surface of the valve core. Since the second water inlet and the third water inlet are simultaneously connected to the inlet port, the water in the inlet port 103 is divided into two paths. One path enters the second water inlet 204 and enters the outlet port 102 from the outlet at the lower end of the second water inlet. The other path passes through the resin tank and the outlet port 104 and enters the first water inlet 203. After passing through the drain hole I230 at the lower end of the valve core, it is discharged from the flushing port 402. In the forward wash mode, the connection between the second water inlet and the inlet port ensures normal water use during the forward wash.

[0108] See Figure 26 In regeneration mode, the first water inlet 203 is connected to the inlet port 103, and the regeneration water inlet 207 is connected to the outlet port 104. The first branch valve 7 and the second branch valve 6 are in the open state. At this time, the water entering from the inlet port 101 is divided into two paths. One path enters the regeneration water inlet 207 and the ejector 5 through the second branch valve 6. When the water passes through the ejector, it creates a negative pressure on the water supply hole I. The brine in the salt valve connected to the water supply port enters the ejector 5. After the brine and raw water are mixed, they pass through the outlet port 104, the resin tank, and the inlet port 103 in sequence before entering the first water inlet 203. After passing through the drain hole I at the lower end of the valve core, it enters the flushing port 402 for discharge. The other path enters the third water inlet 205 through the inlet on the top surface of the valve core, and after passing through the first branch valve 7, it enters the bottom surface of the valve core and enters the outlet port 102. In regeneration mode, the opening of the second branch valve 6 ensures normal water use in regeneration mode.

[0109] See Figure 27In the water replenishment mode, the second water inlet 204 is connected to the tank inlet 103, and the first water inlet 203 is connected to the tank outlet 104. The first branch valve 7 and the second branch valve 6 are in the open state. At this time, the water entering from the water inlet 101 is divided into two paths. One path enters the third water inlet 205 through the inlet on the upper surface of the valve core, and then enters the lower part of the valve core after passing through the first branch valve 7, and enters the water outlet 102. The other path enters the regeneration water inlet 207 after passing through the second branch valve 6. Because the other end of the ejector is blocked, the Venturi effect cannot be formed, and no suction can be generated to form a water replenishment path. The water enters the water replenishment interface 401 after passing through the water replenishment hole I to replenish the salt valve. In the water replenishment mode, the opening of the second branch valve 6 ensures normal water use in the water replenishment mode.

[0110] This utility model relates to a reversing valve assembly for a water softener. The valve body structure is optimized and improved by concentrating the water inlets on the valve core and controlling them through branch valves. This results in a more rational layout of the interfaces, significantly reducing the number of parts, improving the structural compactness of the reversing valve, increasing space utilization, and reducing volume, thus contributing to the miniaturization of the valve body and the water softener. The use of a gap structure to form the flow channel and serve as the inlet and outlet simplifies water circuit connections, reduces manufacturing costs, and ensures good operational reliability. The placement of the water inlet and outlet on the lower cover optimizes the pipeline layout, reduces manufacturing difficulty and costs, and facilitates overall assembly. The guide surfaces are distributed on the upper and lower covers, improving structural compactness and reducing the overall structural volume, which is beneficial for the miniaturization of the water softener. The orientation of each interface is designed to facilitate the overall assembly of the valve body and pipeline connection, making disassembly convenient and facilitating daily maintenance. Integrating the water inlet and valve hole into a single valve core body results in a compact structure and small size, ensuring precise switching between different operating positions. This water softener boasts a long service life and optimized overall performance, while also facilitating a miniaturized design. The integrated valve core reduces connecting parts, lowers leakage risk, and improves system reliability and stability. It also simplifies installation and maintenance, enhancing efficiency and user experience. The multi-station design allows for flexible switching between stations, reducing operational complexity and further improving overall performance and durability. The redesigned integrated valve core optimizes inlet distribution, increases space utilization, and creates a compact structure, reducing overall volume and contributing to miniaturization and weight reduction. This new water softener reversing valve assembly features a redesigned and optimized overall structure, resulting in a compact and rationally laid-out design that significantly reduces overall size and improves space utilization. This allows the water softener to operate efficiently within limited space, meeting the modern family's demand for miniaturized and intelligent appliances and improving users' quality of life.

[0111] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A reversing valve assembly for a water softener, characterized in that, include: The valve housing has a valve core cavity formed inside it, and the valve housing is provided with a water inlet, a water outlet, a tank inlet, a tank outlet, a water replenishment interface, and a flushing interface. A valve core is rotatably mounted in the valve core cavity. The end of the valve core is provided with a drive shaft, which extends to the outside of the valve housing and is used to connect with a drive device. The valve core is formed with a number of water inlets and a number of branch valves placed between different water inlets. The end of the branch valve contacts the guide surface inside the valve housing and can realize the connection or blockage between different water inlets. As the valve core rotates, each of the water inlets can connect to different interfaces to achieve water production, backwashing, regeneration, forward washing, and water replenishment.

2. The reversing valve assembly for a water softener as described in claim 1, characterized in that: The valve core has gaps between its two ends and the inner wall of the valve housing, forming two chambers respectively. The water inlet and the water outlet are respectively connected to the two chambers. The upper and lower ends of the valve core are respectively provided with inlets and outlets. The tank inlet and the tank outlet are connected to the side wall of the valve core chamber.

3. The reversing valve assembly for a water softener as described in claim 1, characterized in that: The valve core has a first water inlet, a second water inlet, a third water inlet, a fourth water inlet, and a regeneration water inlet arranged sequentially along the rotation direction on its sidewall. An ejector is installed inside the regeneration water inlet. The upper end of the third water inlet extends through to the upper surface of the valve core and connects to the inlet interface. A first branch valve is provided between the third water inlet and the lower surface of the valve core. The lower end of the second water inlet extends through to the lower bottom surface of the valve core and connects to the outlet interface. A second branch valve is provided between the upper surface of the valve core and the regeneration water inlet. The lower surface of the valve core has a drain hole I connected to the flushing interface and a water inlet I coaxial with it and connected to the water inlet interface. The water inlet I connects to the regeneration water inlet, and the drain hole I connects to the first water inlet and the fourth water inlet.

4. The reversing valve assembly for a water softener as described in claim 3, characterized in that: The valve core has a coaxial inner tube and an outer tube at its lower surface center. The drain hole I is formed in the inner tube, and the water inlet I is formed between the inner tube and the outer tube. The inner wall of the valve shell has two coaxial holes that are respectively fitted to the inner tube and the outer tube. The two holes are respectively connected to the water inlet and the flushing interface.

5. The reversing valve assembly for a water softener as described in claim 1, characterized in that: The valve housing includes a shell with open ends and an upper cover and a lower cover respectively installed at the two open ends of the shell. An inner cylinder is provided inside the shell, and a valve core cavity with open ends is formed inside the inner cylinder. The water inlet and the water outlet are respectively connected to the two ends of the valve core cavity. There are gaps between the two ends of the inner cylinder and the upper cover and the lower cover to form a chamber. The water supply port and the flushing port are provided on the lower cover, and the guide surface is provided on the upper cover and / or the lower cover.

6. The reversing valve assembly for a water softener as described in claim 3, characterized in that: The upper surface of the valve core is provided with a second valve hole that communicates with the regenerated water inlet. The second branch valve is slidably fitted in the second valve hole and its sliding direction is parallel to the rotation axis of the valve core. A first valve hole is provided between the third water inlet and the lower surface of the valve core. The first branch valve is slidably fitted in the first valve hole and its sliding direction is parallel to the rotation axis of the valve core.

7. The reversing valve assembly for a water softener as described in claim 3, characterized in that: The station angle of the first water inlet is 88°-94°, the station angle of the second water inlet is 48°-54°, ​​the station angle of the third water inlet is 65°-75°, the station angle of the fourth water inlet is 88°-94°, the station angle of the regenerated water inlet is 52°-58°, and the phase difference between the tank inlet and the tank outlet is 60°-75°.

8. The reversing valve assembly for a water softener as described in claim 3, characterized in that: During water production, the third water inlet is connected to the tank inlet, the second water inlet is connected to the tank outlet, and the first branch valve and the second branch valve are in the closed state. During backwashing, the fourth water inlet is connected to the tank inlet, the third water inlet is connected to the tank outlet, the first branch valve is in the open state, and the second branch valve is in the closed state. During the washing process, the second water inlet and the third water inlet are simultaneously connected to the tank inlet, the first water inlet is connected to the tank outlet, and the first branch valve and the second branch valve are in the closed state. During regeneration, the first water inlet is connected to the tank inlet, the regeneration water inlet is connected to the tank outlet, and the first branch valve and the second branch valve are in the open state. When replenishing water, the second water inlet is connected to the tank inlet, the first water inlet is connected to the tank outlet, and the first branch valve and the second branch valve are in the open state.

9. The reversing valve assembly for a water softener as described in claim 6, characterized in that: The regenerated water inlet is a circular hole with its axis perpendicular to the rotation axis of the valve core. The inner wall of the regenerated water inlet is provided with an internal thread for installing the jet injector. The side wall of the brine suction zone of the jet injector in the regenerated water inlet is connected to the water supply hole I, and the second valve hole is connected to the end of the regenerated water inlet.

10. The reversing valve assembly for a water softener as described in claim 3, characterized in that: The jet ejector includes a first valve core section and a second valve core section coaxially arranged and connected to each other. There is a gap between the first valve core section and the second valve core section, forming a brine suction zone. The water supply hole I is located in the brine suction zone. Both ends of the first valve core section have liquid inlet holes, and the liquid inlet end of the liquid inlet hole is conical. Both ends of the second valve core section have liquid outlet holes coaxial with the liquid inlet holes. The outlet end of the liquid outlet hole is flared and forms a diffusion zone. The sidewall of the first valve core section or the second valve core section is provided with external threads, and the end of the first valve core section or the second valve core section is provided with an operating hole for driving its rotation to install it into the valve hole.

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