Backwash valve structure of water purifier

Abstract

The utility model provides a backwash valve structure of a water purifier, which comprises a valve body, a partition plate, a valve core component and a communicating flow channel, and a first water outlet and a second water outlet are formed in two ends of the valve body; the interior of the valve body is divided into a first cavity, a second cavity and a third cavity by the two partition plates, the first cavity is provided with a first water inlet and a third water outlet, and the third cavity is provided with a second water inlet; the valve element assembly is arranged in the second cavity in a sliding mode, and the communicating flow channel communicates with the third water outlet and the second water inlet. The valve element assembly slides into the third cavity so that the second water inlet and the second water outlet can be isolated, the valve element assembly slides into the first cavity so that the first water inlet and the first water outlet can be isolated, in this way, water paths of the upper cavity and the lower cavity are controlled through the valve element assembly, and compared with the mode that the upper cavity and the lower cavity are controlled through two independent valve bodies, the control efficiency is improved. The backwashing valve of the water purifier is compact and ingenious in structural design, simplified in structure, low in production and manufacturing cost, rapid in control response and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a backwash valve structure for a water purifier. Background Technology

[0002] Currently, water purification systems require flushing and backwashing after prolonged use. Backwashing of water purification systems is generally done with ball valves, but their opening speed is slow and time-consuming. For faster flushing, solenoid valves are needed to control the water flow to close and open. However, in existing technologies, two valves are usually required to control the flow separately. This not only increases the complexity of backwashing but also results in a larger space requirement, higher production costs, and the inability to guarantee the synchronization of the two valves, leading to slow response and poor performance. Therefore, it is necessary to develop an integrated backwash valve structure for water purifiers. Utility Model Content

[0003] The purpose of this utility model is to provide a backwash valve structure for a water purifier, aiming to solve at least one of the technical problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a backwash valve structure for a water purifier, comprising:

[0005] A valve body, wherein openings at both ends of the valve body extend into the valve body to form a first water outlet and a second water outlet;

[0006] Two partitions are spaced apart in the valve body to divide the interior of the valve body into a first cavity, a second cavity and a third cavity. The first cavity has a first inlet and a third outlet, and the third cavity has a second inlet.

[0007] A valve core assembly, wherein the valve core assembly is disposed in the second cavity, and the valve core assembly is at least partially slidable into the first cavity to isolate the connected first inlet and the first outlet from each other; or the valve core assembly is at least partially slidable into the third cavity to isolate the connected second inlet and the second outlet from each other.

[0008] A connecting channel is provided, with its two ends connected to the third outlet and the second inlet, respectively.

[0009] The present invention is further configured such that the backwash valve structure of the water purifier includes:

[0010] The first tympanic membrane is disposed in the first cavity and abuts against the first water outlet. The first tympanic membrane divides the first cavity into a first water pressure chamber and a first water inlet chamber. A first pressure boosting hole is provided between the first water inlet chamber and the first water pressure chamber, and a first pressure relief hole is provided between the first water inlet chamber and the first water outlet.

[0011] The second diaphragm is disposed in the third cavity and abuts against the second water outlet. The second diaphragm divides the third cavity into a second water pressure chamber and a second water inlet chamber. A second pressure boosting hole is provided between the second water inlet chamber and the second water pressure chamber. A second pressure relief hole is provided between the second water inlet chamber and the second water outlet.

[0012] The valve core assembly can be slidable into the first water pressure chamber to block the first pressure relief hole, or it can be slidable into the second water pressure chamber to block the second pressure relief hole.

[0013] The present invention is further configured such that the first pressure relief hole is formed on the first diaphragm so that when the valve core assembly slides into the first water pressure chamber, the first diaphragm blocks the first water outlet; and the second pressure relief hole is formed on the second diaphragm so that when the valve core assembly slides into the second water pressure chamber, the second diaphragm blocks the second water outlet.

[0014] The present invention is further configured such that the valve core assembly includes a valve stem and a coil winding surrounding the valve stem, so as to control the valve stem to slide vertically by means of a magnetic field generated by energizing the coil winding, thereby allowing the two ends of the valve stem to slide into the first water pressure chamber and the second water pressure chamber respectively.

[0015] The present invention is further configured such that a first pressure plate is provided on the first diaphragm and a second pressure plate is provided on the second diaphragm, wherein when the valve stem slides to the first cavity, the first pressure plate assists the first diaphragm in sealing the first outlet; and when the valve stem slides to the third cavity, the second pressure plate assists the second diaphragm in sealing the second outlet.

[0016] The present invention is further configured such that the valve stem is an iron core, which includes a main body and a stem, the stem being disposed at both ends of the main body.

[0017] The present invention is further configured such that a through hole is provided on the partition plate, wherein one of the rod portions can pass through the through hole located in the upper partition plate to enter the third cavity, and the other rod portion can pass through the through hole located in the lower partition plate to enter the first cavity.

[0018] The present invention is further configured such that a sealing ring is provided inside the through hole, and the sealing ring is tightly fitted to the outer side of the rod to prevent water from entering the second cavity through the through hole.

[0019] The present invention is further configured such that the valve core assembly also includes a magnet, and at least one of the two partitions is provided with the magnet; when the coil winding is de-energized, the magnet close to the iron core can generate an attractive force on the iron core to keep the iron core in its current state.

[0020] The present invention is further configured such that the valve core assembly also includes a spring, one end of which is connected to the main body and the other end of which is connected to one of the partitions. When the coil winding is energized, the spring is in a compressed or stretched state so that when the coil winding is de-energized, the elastic force of the spring can drive the iron core back to the initial position.

[0021] As can be seen from the above technical solution, the backwash valve structure of this utility model includes a valve body, partitions, a valve core assembly, and a connecting flow channel. The valve body has openings at both ends extending into the valve body to form a first outlet and a second outlet. Two partitions are spaced apart in the valve body to divide the interior of the valve body into a first cavity, a second cavity, and a third cavity. The first cavity has a first inlet and a third outlet, and the third cavity has a second inlet. The valve core assembly is slidably disposed in the second cavity and can slide into the first cavity to isolate the connected first inlet and first outlet from each other; or the valve core assembly can slide into the third cavity to isolate the connected second inlet and second outlet from each other. The two ends of the connecting flow channel are respectively connected to the third outlet and the second inlet. When the valve core assembly slides into the third chamber, it isolates the second inlet and the second outlet from each other, closing the water path in the third chamber while opening the water path in the first chamber. This means the connection between the first inlet and the first outlet is open, allowing water to flow in through the first inlet and out through the first outlet. Conversely, when the valve core assembly slides into the first chamber, it isolates the first inlet and the first outlet from each other, closing the water path in the first chamber while opening the water path in the third chamber. This opens the connection between the connecting channel and the second outlet, allowing water to flow out through the second outlet. Compared to using two separate valve bodies for the upper and lower chambers, this backwash valve design for water purifiers is compact and ingenious, reducing the number of components and installation complexity, resulting in lower production costs. The water paths in both chambers are controlled by the valve core assembly, providing rapid control response and ease of use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of a backwash valve structure for a water purifier provided by this utility model;

[0024] Figure 2 This is a cross-sectional view of the backwash valve structure of a water purifier provided by this utility model;

[0025] Figure 3 This is a cross-sectional view of the backwash valve structure of a water purifier according to an embodiment of this utility model;

[0026] Figure 4 This utility model provides Figure 3 Enlarged view of section B in the middle;

[0027] Figure 5 This is a cross-sectional view of the backwash valve structure of a water purifier according to another embodiment of the present invention;

[0028] Figure 6 This utility model provides Figure 5 Enlarged view of section C.

[0029] The above figures include the following reference numerals:

[0030] 10. Valve body; 11. First outlet; 12. Second outlet; 13. Third outlet; 14. First inlet; 15. Second inlet; 16. Baffle; 161. Sealing ring;

[0031] 20. Flow channel; 21. Connecting ring; 30. Valve core assembly; 31. Valve stem; 311. Main body; 312. Stem; 32. Coil winding; 33. Second cavity; 34. Magnet; 35. Spring;

[0032] 40. First tympanic membrane; 41. First pressure relief port; 42. First pressure boosting port; 43. First pressure plate; 44. First water inlet chamber; 45. First water pressure chamber;

[0033] 50. Second tympanic membrane; 51. Second pressure relief hole; 52. Second pressure boosting hole; 53. Second pressure plate; 54. Second water inlet chamber; 55. Second water pressure chamber. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Please refer to the following: Figures 1 to 6 This utility model provides a backwash valve structure for a water purifier, including a valve body 10, partitions 16, a valve core assembly 30, and a connecting flow channel 20. The valve body 10 has openings at both ends extending inwards to form a first outlet 11 and a second outlet 12. Two partitions 16 are spaced apart within the valve body 10 to divide the interior of the valve body 10 from bottom to top into a first cavity, a second cavity 33, and a third cavity. The second cavity 33 is located between the two partitions 16. The first cavity has a first inlet... The water inlet 14 and the third water outlet 13 are provided. The third cavity is provided with a second water inlet 15. The valve core assembly 30 is disposed in the second cavity 33. A portion of the valve core assembly 30 can slide into the first cavity to isolate the connected first water inlet 14 and the first water outlet 11 from each other; or a portion of the valve core assembly 30 can slide into the third cavity to isolate the connected second water inlet 15 and the second water outlet 12 from each other. The two ends of the connecting flow channel 20 are respectively connected to the third water outlet 13 and the second water inlet 15.

[0036] As can be seen, the backwash valve structure of this utility model includes a valve body 10, a partition 16, a valve core assembly 30, and a connecting flow channel 20. The valve body 10 has openings at both ends extending into the valve body 10 to form a first outlet 11 and a second outlet 12. The two partitions 16 are spaced apart inside the valve body 10 to divide the interior of the valve body 10 into a first cavity, a second cavity 33, and a third cavity. The first cavity has a first inlet 14 and a third outlet 13, and the third cavity has a second inlet 15. The valve core assembly 30 is slidably disposed in the second cavity 33. The valve core assembly 30 can slide into the first cavity to isolate the connected first inlet 14 and the first outlet 11 from each other; or the valve core assembly 30 can slide into the third cavity to isolate the connected second inlet 15 and the second outlet 12 from each other. The two ends of the connecting flow channel 20 are respectively connected to the third outlet 13 and the second inlet 15. When the valve core assembly 30 slides into the third chamber, it isolates the second inlet 15 from the second outlet 12, closing the water path in the third chamber and opening the water path in the first chamber, i.e., opening the connection between the first inlet 14 and the first outlet 11, allowing water to flow in from the first inlet 14 and out from the first outlet 11. When the valve core assembly 30 slides into the first chamber, it isolates the first inlet 14 from the first outlet 11, closing the water path in the first chamber and opening the water path in the third chamber, opening the connection between the connecting channel 20 and the second outlet 12, allowing water to flow out from the second outlet 12. Compared to using two separate valve bodies for the upper and lower chambers, this backwash valve design for water purifiers is compact and ingenious, reducing the number of components and installation complexity, resulting in low production costs. The water paths of both the upper and lower chambers are controlled by the valve core assembly, providing rapid control response and ease of use.

[0037] In this embodiment, as Figure 2As shown, the backwash valve structure of the water purifier also includes a first diaphragm 40 and a second diaphragm 50. The first diaphragm 40 is disposed in the first cavity and abuts against the first outlet 11. The first diaphragm 40 divides the first cavity into a first water pressure chamber 45 and a first water inlet chamber 44. A first pressure boosting hole 42 is provided between the first water inlet chamber 44 and the first water pressure chamber 45, and a first pressure relief hole 41 is provided between the first water inlet chamber 44 and the first outlet 11. The second diaphragm 50 is disposed in the third cavity. The second diaphragm 50 is located inside the body and abuts against the second outlet 12. The second diaphragm 50 divides the third cavity into a second water pressure chamber 55 and a second water inlet chamber 54. A second pressure boosting hole 52 is provided between the second water inlet chamber 54 and the second water pressure chamber 55. A second pressure relief hole 51 is provided between the second water inlet chamber 54 and the second outlet 12. The valve core assembly 30 can slide into the first water pressure chamber 45 to block the first pressure relief hole 41, or slide into the second water pressure chamber 55 to block the second pressure relief hole 51. With this configuration, when the backwash valve structure of this embodiment is applied to the filter bottle of the water purifier, water flows into the first chamber from the first inlet 14, and the valve core assembly 30 slides into the second water pressure chamber 55 to block the second pressure relief hole 51, thus isolating the second inlet 15 from the second outlet 12. The connecting channel 20 is not connected to the second outlet 12, that is, the second outlet 12 is closed. The water flows into the water purifier through the first outlet 11 for filtration, so as to filter the water into relatively pure water for convenient daily use. When the valve core assembly 30 slides into the second water pressure chamber 55, the water pressure relief hole 51 is blocked. When the first pressure relief hole 41 is blocked in the water pressure chamber 45, the first inlet 14 and the first outlet 11 are isolated from each other. At this time, the first inlet 14 is closed and the second outlet 12 is opened. The impurities and wastewater in the filter bottle of the water purifier flow into the connecting channel 20 through the first outlet 11 and are discharged through the second outlet 12 to achieve the purpose of backwashing the water purifier. In this embodiment, the water circuits of the upper and lower chambers are controlled by the valve core assembly. Compared with using two independent valve bodies, this backwash valve structure of the water purifier reduces the number of components and the complexity of installation. The design is compact and ingenious, and the control response is rapid. At the same time, it further improves the reliability and synchronization of the water purifier's filtration and backwashing state transition process.

[0038] Specifically, such as Figure 2 As shown, a first pressure relief hole 41 is formed on the first diaphragm 40 so that when the valve core assembly 30 slides into the first water pressure chamber 45, the first diaphragm 40 blocks the first outlet 11. A second pressure relief hole 51 is formed on the second diaphragm 50 so that when the valve core assembly 30 slides into the second water pressure chamber 55, the second diaphragm 50 blocks the second outlet 12. This arrangement simplifies the structure and further increases its reliability.

[0039] Furthermore, the valve core assembly 30 includes a valve stem 31 and a coil winding 32 surrounding the valve stem 31. The valve stem 31 is controlled to slide vertically by the magnetic field generated by energizing the coil winding 32, allowing both ends of the valve stem 31 to slide into the first hydraulic chamber 45 and the second hydraulic chamber 55, respectively. By using an electromagnetic induction structure and principle to automatically control the up-and-down sliding of the valve stem 31, the difficulty of manual operation is further reduced, and the practicality and applicability of the product are further increased. The specific structure and principle of electromagnetic induction are existing technologies and will not be elaborated further here.

[0040] Optionally, a wire-passing hole may be provided on the side wall of the second cavity 33 of the valve body 10 so that the coil winding 32 can be electrically connected to an external power source through the wire-passing hole.

[0041] Specifically, such as Figure 2 As shown, a first pressure plate 43 is provided on the first diaphragm 40, and a second pressure plate 53 is provided in the middle of the second diaphragm 50. A first pressure relief hole 41 is provided through the first diaphragm 40 and the first pressure plate 43. When the valve stem 31 slides to the first cavity, the first pressure plate 43 assists the first diaphragm 40 in sealing the first outlet 11; when the valve stem 31 slides to the third cavity, the second pressure plate 53 assists the second diaphragm 50 in sealing the second outlet 12. This arrangement not only ensures that the first diaphragm 40 and the second diaphragm 50 can effectively seal the first outlet 11 and the second outlet 12, but also protects the first diaphragm 40 and the second diaphragm 50 from damage by the valve stem 31, increasing the reliability and stability of the structure.

[0042] The first diaphragm 40 and the second diaphragm 50 are made of elastic thin film material, while the first pressure plate 43 and the second pressure plate 53 are made of rigid material. They slide into the first cavity through the rod 312 of the valve core assembly 30 and press against and block the first pressure relief hole 41, so that the rigid first pressure plate 43 abuts against the outer peripheral wall of the first water outlet 11, thereby preventing the rod 312 of the valve core assembly 30 from piercing and damaging the first diaphragm 40. Similarly, the structural principle and beneficial effects of the second diaphragm 50 and the second pressure plate 53 are the same as those described above, and will not be repeated here.

[0043] In this embodiment, the valve stem 31 is an iron core, comprising a main body 311 and a stem 312. The stem 312 is disposed at both ends of the main body 311, and the diameter of the stem 312 is smaller than the diameter of the main body 311. This design increases the structural strength of the product and reduces material costs.

[0044] Furthermore, such as Figure 4 and Figure 6As shown, both partitions 16 have through holes. One rod 312 can pass through the through hole in the upper partition 16 to enter the third cavity, and the other rod 312 can pass through the through hole in the lower partition 16 to enter the first cavity. The water passages of the first cavity and the third cavity are controlled by the rods 312 at both ends of the main body 311, which increases the structural reliability.

[0045] Specifically, a sealing ring 161 is installed inside the through hole, and the sealing ring 161 fits tightly against the outside of the rod portion 312 to prevent water from entering the second cavity 33 through the through hole. This design effectively prevents water leakage, thus avoiding damage to the valve structure and further increasing product reliability.

[0046] In one embodiment, such as Figure 3 and Figure 4 As shown, the valve core assembly 30 also includes a magnet 34, and at least one of the two partitions 16 is provided with a magnet 34 (the upper partition 16 is shown in the figure with a magnet 34). When the coil winding 32 is de-energized, the magnet 34 near the iron core can exert an attractive force on the iron core to keep it in its current state, so that the coil winding 32 does not need to be continuously energized. By using the attractive force of the magnet 34 to maintain the position of the iron core, the control of the valve's state after power failure is simplified to a certain extent. After the coil winding 32 is de-energized, the backwash valve structure of the water purifier can achieve self-locking, without the need to continuously maintain current flow, reducing power consumption. Furthermore, it eliminates the need for additional mechanical locking devices or complex control programs to ensure the stability of the backwash valve structure during power failure, further increasing product reliability and practicality.

[0047] In another embodiment, such as Figure 5 and Figure 6 As shown, the valve core assembly 30 also includes a spring 35. One end of the spring 35 is connected to the main body 311, and the other end is connected to one of the partitions 16. When the coil winding 32 is energized, the spring 35 is in a compressed or stretched state, so that when the coil winding 32 is de-energized, the elastic force of the spring 35 can drive the iron core back to its initial position. With this setting, the iron core can be automatically reset without the need for additional energy to drive the iron core to reset, further improving the practicality of the product, and the structure is simple and the production cost is low.

[0048] In this embodiment, as Figure 2 and Figure 3As shown, both ends of the valve body 10 have limiting steps on their inner walls to axially limit movement by abutting against the limiting steps with the partition 16. A first pipe connector is detachably installed at the lower end of the valve body 10. The first pipe connector and the lower end of the valve body 10 can be detachably connected by a thread or a snap-fit ​​method. A sealing ring is provided between the first pipe connector and the inner wall of the lower end of the valve body 10. The end of the first pipe connector near the partition 16 protrudes inward to form a first outlet 11, and the end of the first pipe connector away from the partition 16 protrudes outward to form a connecting pipe. A third outlet 13 is opened on the side wall of the connecting pipe, and the third outlet 13 is connected to the first outlet 11. A first inlet 14 is opened on the side wall of the lower end of the valve body 10. 11 is opened on the lower end face of the valve body 10, and the central axis of the first inlet 14 is perpendicular to the central axis of the first outlet 11. The first diaphragm 40 is disposed between the first pipe joint and the lower partition 16. The outer peripheral edge of the first diaphragm 40 extends outward to form an outer edge, so as to fix the first diaphragm 40 between the outer periphery of the first pipe joint and the outer periphery of the lower partition 16 by the outer edge. Of course, the outer peripheral edge of the first diaphragm 40 can also be fixed to the inner end of the first pipe joint by a snap-fit ​​method. The first water pressure chamber 45 is located between the first diaphragm 40 and the lower partition 16, and the first water inlet chamber 44 is located between the first diaphragm 40 and the first inlet 14. The first inlet 14 and the first water inlet chamber 44 are connected.

[0049] Furthermore, a second pipe connector is detachably installed on the upper end of the valve body 10. The second pipe connector can be detachably connected to the upper end of the valve body 10 by means of threads or snap-fit. A sealing ring is provided between the second pipe connector and the inner wall of the upper end of the valve body 10. The upper partition 16 is installed and fixed to the upper end of the valve body 10 by means of the outer peripheral wall of the second pipe connector and the limiting step. The end of the second pipe connector near the partition 16 protrudes inward to form a second outlet 12. The side wall of the upper end of the valve body 10 protrudes to form a second inlet 15. A second diaphragm 50 is disposed between the second pipe connector and the upper partition 16. The outer periphery of the valve body 10 extends outward to form an outer edge, which is used to fix the second diaphragm 50 between the outer periphery of the second pipe joint and the outer periphery of the upper partition 16. The second water pressure chamber 55 is located between the second diaphragm 50 and the upper partition 16. The second water inlet chamber 54 is located between the second water inlet 15 and the second diaphragm 50, and the second water inlet 15 and the second water inlet chamber 54 are connected. The second water inlet 15 is opened on the side wall of the upper end of the valve body 10, and the second water outlet 12 is opened on the upper end face of the valve body 10. The central axis of the second water inlet 15 is perpendicular to the central axis of the second water outlet 12.

[0050] Specifically, such as Figure 2 and Figure 3As shown, the two ends of the connecting channel 20 are detachably connected to the third outlet 13 and the second inlet 15, respectively. One end of the connecting channel 20 is detachably connected to the third outlet 13, and the other end of the connecting channel 20 is detachably connected to the second inlet 15 via a connecting ring 21. Both ends of the connecting channel 20 extend circumferentially to form a first flange, and one end of the connecting ring 21 extends circumferentially inward to form a second flange, so as to fix the channel by abutting against the first flange and the second flange. The outer peripheral surfaces of the third outlet 13 and the second inlet 15 are both provided with external threads, and the inner peripheral surface of the other end of the connecting ring 21 is provided with internal threads, so that the two connecting rings 21 are threadedly connected to the third outlet 13 and the second inlet 15 respectively. In addition, it should be noted that when this backwash valve structure is applied to the filter bottle of the water purifier, a channel can be opened in the inner wall of the filter bottle or filter bottle cover to form a connecting flow channel 20. That is, the connecting flow channel 20 and the filter bottle or filter bottle cover can be integrally formed.

[0051] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0052] The backwash valve structure of this utility model includes a valve body 10, partitions 16, a valve core assembly 30, and a connecting channel 20. The valve body 10 has openings at both ends extending inwards to form a first outlet 11 and a second outlet 12. Two partitions 16 are spaced apart within the valve body 10 to divide the interior into a first cavity, a second cavity 33, and a third cavity. The first cavity has a first inlet 14 and a third outlet 13, and the third cavity has a second inlet 15. The valve core assembly 30 is slidably disposed within the second cavity 33. The valve core assembly 30 can slide into the first cavity to isolate the connected first inlet 14 from the first outlet 11; or the valve core assembly 30 can slide into the third cavity to isolate the connected second inlet 15 from the second outlet 12. The two ends of the connecting channel 20 are respectively connected to the third outlet 13 and the second inlet 15. When the valve core assembly 30 slides into the third chamber, it isolates the second inlet 15 from the second outlet 12, closing the water path in the third chamber and opening the water path in the first chamber, i.e., opening the connection between the first inlet 14 and the first outlet 11, allowing water to flow in from the first inlet 14 and out from the first outlet 11. When the valve core assembly 30 slides into the first chamber, it isolates the first inlet 14 from the first outlet 11, closing the water path in the first chamber and opening the water path in the third chamber, opening the connection between the connecting channel 20 and the second outlet 12, allowing water to flow out from the second outlet 12. Compared to using two separate valve bodies for the upper and lower chambers, this backwash valve design for water purifiers is compact and ingenious, reducing the number of components and installation complexity, resulting in low production costs. The water paths of both the upper and lower chambers are controlled by the valve core assembly, providing rapid control response and ease of use.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "lateral, longitudinal, vertical, horizontal" and "top, bottom" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; in addition, the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0055] Certain terms are used in the specification and claims of this utility model to refer to specific elements. Those skilled in the art will understand that manufacturers may use different names to refer to the same components, and this document is not intended to distinguish between components that have the same function but different names. In the following specification and claims, words such as “comprising,” “having,” and “including” are open-ended terms and should therefore be interpreted as “containing but not limited to…”.

[0056] It should be understood that when a component is referred to as being "on" or "connected" to another component, it can be directly on or directly connected to that other component, or it can be an indirect connection through an inserting component. Conversely, when a component is referred to as being "directly" on or "directly connected" to another component, there is no inserting component between them.

[0057] In the description of this specification, the terms "an embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Furthermore, it should be noted that in the description of this utility model, the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0059] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0060] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A backwash valve structure for a water purifier, characterized in that, include: The valve body (10) has openings at both ends that extend into the valve body (10) to form a first outlet (11) and a second outlet (12); Partition (16), two partitions (16) are spaced apart inside the valve body (10) to divide the inside of the valve body (10) into a first cavity, a second cavity (33) and a third cavity. The first cavity has a first inlet (14) and a third outlet (13), and the third cavity has a second inlet (15). A valve core assembly (30) is disposed in the second cavity (33), and the valve core assembly (30) is at least partially slidable into the first cavity to isolate the communicating first inlet (14) from the first outlet (11); or the valve core assembly (30) is at least partially slidable into the third cavity to isolate the communicating second inlet (15) from the second outlet (12). A connecting channel (20) is provided, with its two ends connected to the third outlet (13) and the second inlet (15), respectively.

2. The backwash valve structure for a water purifier according to claim 1, characterized in that, Also includes: A first tympanic membrane (40) is disposed in the first cavity and abuts against the first water outlet (11). The first tympanic membrane (40) divides the first cavity into a first water pressure chamber (45) and a first water inlet chamber (44). A first pressure boosting hole (42) is provided between the first water inlet chamber (44) and the first water pressure chamber (45). A first pressure relief hole (41) is provided between the first water inlet chamber (44) and the first water outlet (11). The second diaphragm (50) is disposed in the third cavity and abuts against the second water outlet (12). The second diaphragm (50) divides the third cavity into a second water pressure chamber (55) and a second water inlet chamber (54). A second pressure boosting hole (52) is provided between the second water inlet chamber (54) and the second water pressure chamber (55). A second pressure relief hole (51) is provided between the second water inlet chamber (54) and the second water outlet (12). The valve core assembly (30) can slide into the first water pressure chamber (45) to block the first pressure relief hole (41), or it can slide into the second water pressure chamber (55) to block the second pressure relief hole (51).

3. The backwash valve structure for a water purifier according to claim 2, characterized in that, The first pressure relief hole (41) is formed on the first diaphragm (40) so that when the valve core assembly (30) slides into the first water pressure chamber (45), the first diaphragm (40) blocks the first water outlet (11). The second pressure relief hole (51) is formed on the second diaphragm (50) so that when the valve core assembly (30) slides into the second water pressure chamber (55), the second diaphragm (50) blocks the second water outlet (12).

4. The backwash valve structure for a water purifier according to claim 2, characterized in that, The valve core assembly (30) includes a valve stem (31) and a coil winding (32) surrounding the valve stem (31) to control the valve stem (31) to slide vertically by means of a magnetic field generated by energizing the coil winding (32), so that the two ends of the valve stem (31) can slide into the first water pressure chamber (45) and the second water pressure chamber (55) respectively.

5. The backwash valve structure for a water purifier according to claim 2, characterized in that, A first pressure plate (43) is provided on the first diaphragm (40), and a second pressure plate (53) is provided on the second diaphragm (50). When the valve stem (31) slides to the first cavity, the first pressure plate (43) assists the first diaphragm (40) in blocking the first outlet (11); when the valve stem (31) slides to the third cavity, the second pressure plate (53) assists the second diaphragm (50) in blocking the second outlet (12).

6. The backwash valve structure for a water purifier according to claim 4, characterized in that, The valve stem (31) is an iron core, which includes a main body (311) and a stem (312), with the stem (312) disposed at both ends of the main body (311).

7. The backwash valve structure for a water purifier according to claim 6, characterized in that, The partition (16) has through holes, one of the rods (312) can pass through the through hole located in the upper partition (16) to enter the third cavity, and the other rod (312) can pass through the through hole located in the lower partition (16) to enter the first cavity.

8. The backwash valve structure for a water purifier according to claim 7, characterized in that, A sealing ring (161) is provided inside the through hole. The sealing ring (161) fits tightly against the outside of the rod (312) to prevent water from flowing into the second cavity (33) through the through hole.

9. The backwash valve structure for a water purifier according to claim 6, characterized in that, The valve core assembly (30) also includes a magnet (34), and at least one of the two partitions (16) is provided with the magnet (34); when the coil winding (32) is de-energized, the magnet (34) close to the iron core can generate an attractive force on the iron core to keep the iron core in its current state.

10. The backwash valve structure for a water purifier according to claim 6, characterized in that, The valve core assembly (30) also includes a spring (35), one end of which is connected to the main body (311) and the other end is connected to one of the partitions (16). When the coil winding (32) is energized, the spring (35) is in a compressed or stretched state so that the elastic force of the spring (35) can drive the iron core back to the initial position after the coil winding (32) is de-energized.

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