Pressure stabilizing reflux valve and water purifier

Abstract

This application relates to a pressure-stabilizing reflux valve and a water purifier. The pressure-stabilizing reflux valve has a first outlet, a second inlet, and a second outlet. It also has a first water flow channel connected to the first outlet at one end, a third water flow channel connecting the second inlet and the second outlet, and a fourth water flow channel connecting the second inlet and the other end of the first water flow channel. The pressure-stabilizing reflux valve can simultaneously open the third and fourth water flow channels. The fourth water flow channel guides excess purified water flowing into the instant hot water dispenser back to the purifier, reducing the pressure in the first water flow channel. This ensures that the pressure in the first water flow channel and the second inlet is maintained below a preset pressure value, thus preventing sudden increases and decreases in the purified water pressure of the water purifier, preventing frequent start-ups and shutdowns, and improving the customer experience.

Description

Technical Field

[0001] This application relates to the field of water purification equipment technology, and in particular to a pressure stabilizing reflux valve and a water purifier. Background Technology

[0002] Currently, household water purifiers are often used in conjunction with instant hot water dispensers. However, instant hot water dispensers require a smaller water flow rate, while the pure water flow rate of water purifiers is often greater than that of instant hot water dispensers. Moreover, most water purifiers rely on internal pressure switches to control their start and stop. Using them together directly can cause the pure water pressure in the water purifier to fluctuate, leading to frequent start and stop of the water purifier and a poor customer experience. Summary of the Invention

[0003] Therefore, it is necessary to address the problem that using existing water purifiers directly with instant hot water dispensers can cause sudden highs and lows in the pure water pressure of the water purifier, leading to frequent start-ups and shutdowns and a poor customer experience. A pressure-stabilizing backflow valve and water purifier are needed to alleviate this problem, thereby preventing frequent start-ups and shutdowns and improving the customer experience.

[0004] One aspect of this application is to improve a pressure-stabilizing reflux valve, which has a first outlet, a first inlet, and a second outlet;

[0005] The pressure-stabilizing reflux valve also has a first water flow channel that is connected to the first outlet, a second water flow channel that is connected to the first inlet and the second outlet, and a third water flow channel that is connected to the other end of the first inlet and the first water flow channel.

[0006] The pressure-stabilizing reflux valve can simultaneously open the second and third water flow channels.

[0007] In one embodiment, the pressure-stabilizing reflux valve includes a valve body and a water flow reversing valve. The valve body has an inner cavity and a first outlet, a first inlet and a second outlet that are all connected to the inner cavity.

[0008] The water flow reversing valve, the first water flow channel, the second water flow channel and the third water flow channel are all located in the inner cavity. The water flow reversing valve can simultaneously open or close the second water flow channel and the third water flow channel.

[0009] In one embodiment, the water flow reversing valve includes a valve seat and a valve core. The valve seat has a first sub-channel and a second sub-channel. One end of the first sub-channel is connected to a first water inlet, and one end of the second sub-channel is connected to a first water flow channel.

[0010] The valve core is able to move relative to the valve seat and includes a first position and a second position during the movement. When the valve core is in the first position, the other end of the first sub-channel is connected to the second outlet to conduct the second water flow channel, and the other end of the second sub-channel is connected to the first inlet to conduct the third water flow channel. When the valve core is in the second position, the other end of the first sub-channel is isolated from the second outlet, and the other end of the second sub-channel is isolated from the first inlet.

[0011] In one embodiment, when the valve core is in the first position, the other end of the second sub-channel is connected to the first inlet through the first sub-channel.

[0012] In one embodiment, a communication channel is formed between the water flow reversing valve and the cavity wall of the inner cavity. When the valve core is in the first position, the communication channel connects the first sub-channel and the second sub-channel, as well as the first sub-channel and the second outlet. When the valve core is in the second position, the communication channel is disconnected from the first sub-channel.

[0013] In one embodiment, the pressure stabilizing reflux valve further includes a first sealing ring and a second sealing ring, which are spaced apart along the longitudinal direction of the valve seat and seal between the valve seat and the cavity wall of the inner cavity, thus defining a first sealing cavity. One end of the first sub-channel is connected to the first water inlet through the first sealing cavity.

[0014] The first sealing ring is positioned further away from the second outlet than the second sealing ring, and the connecting channel is formed on the side of the second sealing ring that is away from the first sealing cavity.

[0015] In one embodiment, the pressure-stabilizing reflux valve includes a third sealing ring and a fourth sealing ring; when the valve core is in the second position, one end of the valve core is sealed to the valve seat through the third sealing ring, and the other end of the valve core is located outside the valve seat and is sealed to the cavity wall of the inner cavity through the fourth sealing ring; when the valve core is in the first position, the valve core is disengaged from the first sub-channel, and there is a gap between the fourth sealing ring and the cavity wall of the inner cavity to define a portion of the communicating channel.

[0016] In one embodiment, the pressure-regulating reflux valve further includes a first elastic element, which is pre-pressed between the valve core and the cavity wall of the inner cavity to provide a preload force that gives the valve core a tendency to move from a first position toward a second position.

[0017] In one embodiment, the water flow reversing valve also has a pressure stabilizing channel that maintains communication between the first inlet and the second outlet.

[0018] In one embodiment, the water flow reversing valve further includes a one-way valve, which is located at one end of the second sub-channel that connects to the first water flow channel. The one-way valve is configured to unidirectionally guide the water flow from the first inlet to the first water flow channel.

[0019] In one embodiment, the pressure-stabilizing reflux valve further has a second inlet and a second water flow channel connecting the second inlet and the other end of the first water flow channel;

[0020] The pressure-stabilizing reflux valve can shut off the second water flow channel when the pressure in the first water flow channel reaches a preset pressure value.

[0021] In one embodiment, the pressure-regulating reflux valve further includes a pressure-regulating structure;

[0022] The pressure stabilizing structure is configured to shut off the second water flow channel when the pressure in the first water flow channel reaches a preset pressure value.

[0023] In one embodiment, the pressure-stabilizing reflux valve includes a valve housing, the valve housing having an inner cavity and a second inlet and a first outlet, both of which are connected to the inner cavity;

[0024] The pressure stabilizing structure, the second water flow channel, the first water flow channel, the second water flow channel and the third water flow channel are all located in the inner cavity. The pressure stabilizing structure can move relative to the valve body to block or open the second water inlet. When the pressure stabilizing structure blocks the second water inlet, it shuts off the second water flow channel.

[0025] In one embodiment, the pressure-stabilizing reflux valve further includes a second elastic element, which is pre-pressed between the pressure-stabilizing structure and the cavity wall of the inner cavity to provide a pre-tightening force that allows the pressure-stabilizing structure to move from the position of blocking the second inlet to the position of opening the second inlet.

[0026] In one embodiment, the voltage stabilizing structure includes a voltage stabilizing base and an elastic sealing diaphragm, one end of which is sealed and fixedly connected to the voltage stabilizing base, and the other end is sealed and fixedly connected to the cavity wall of the inner cavity.

[0027] The pressure stabilizing base can move relative to the valve body, and the elastic sealing diaphragm can be bent and deformed.

[0028] In one embodiment, the valve housing has a guide tube, the pressure stabilizing structure has a guide channel inside, the pressure stabilizing structure also includes a sealing member disposed in the guide channel, one end of the guide tube is provided with a second water inlet, and the other end is inserted into the guide channel and cooperates with the pressure stabilizing structure.

[0029] The pressure stabilizing structure can move relative to the guide pipe to drive the sealing component to seal or open the end of the guide pipe away from the second inlet.

[0030] Another aspect of this application provides a water purifier, including a main body and the pressure-stabilizing backflow valve in any of the above embodiments;

[0031] The main body has a first inlet and an outlet. The first inlet is connected to the first outlet, and the outlet is connected to the first inlet.

[0032] The aforementioned pressure-stabilizing reflux valve and water purifier, by setting a third water flow channel, guide excess pure water flowing back to the instant hot water dispenser, reducing the pressure in the first water flow channel. Since the first water flow channel is connected to the third water flow channel, and the third water flow channel is connected to the first water inlet, the pressure in the first water flow channel and the first water inlet can be kept the same, that is, both can be kept below the preset pressure value. Therefore, it can avoid sudden high and low pressure at the pure water end of the water purifier, prevent frequent start and stop of the water purifier, and improve the customer experience. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a water purifier according to one embodiment of this application;

[0034] Figure 2 This is a schematic cross-sectional view of the pressure-stabilizing reflux valve in one embodiment of this application;

[0035] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the pressure-stabilizing reflux valve in another state.

[0036] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of another state of the pressure-stabilizing reflux valve is shown.

[0037] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the valve body of the pressure-stabilizing reflux valve shown;

[0038] Figure 6 for Figure 1 The diagram shows a cross-sectional view of the pressure-stabilizing structure of the pressure-stabilizing reflux valve.

[0039] Figure label:

[0040] Regulating reflux valve 100;

[0041] Valve housing 10;

[0042] First inlet 11, first outlet 12, second outlet 13, second inlet 14, first water flow channel 15, second water flow channel 16, third water flow channel 17, fourth water flow channel 18, shell body 101, first end cap 102, guide pipe 1021, second end cap 103, guide pipe 1031, first sealing cavity 104, connecting channel 105, second sealing cavity 106;

[0043] Water flow reversing valve 20;

[0044] Valve seat 21, valve core 22, first sub-channel 211, second sub-channel 212, pressure regulating hole 221, pressure regulating channel 23, one-way valve 24;

[0045] Voltage stabilizing structure 30;

[0046] 31. Blocking component; 32. Conducting channel; 33. Voltage stabilizer; 331. First voltage stabilizer; 332.

[0047] First sealing ring 40;

[0048] Second sealing ring 45;

[0049] Third sealing ring 50;

[0050] Fourth sealing ring 55;

[0051] First elastic element 60;

[0052] Fifth seal 65;

[0053] Sixth seal 70;

[0054] Second elastic element 75;

[0055] Water purifier 200;

[0056] Ontology 210;

[0057] First entrance 2101, exit 2102;

[0058] Instant hot water dispenser 300;

[0059] Second entrance 310. Detailed Implementation

[0060] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 of this application.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0067] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0068] Figure 2 This is a schematic cross-sectional view of the pressure-stabilizing reflux valve in one embodiment of this application; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the pressure-stabilizing reflux valve in another state. Figure 4 for Figure 1 The accompanying diagram shows a cross-sectional view of another state of the pressure-stabilizing reflux valve; for ease of description, the diagram only shows the structure relevant to the embodiments of this application.

[0069] Referring to the accompanying drawings, one embodiment of this application provides a pressure-stabilizing backflow valve 100, including a valve housing 10 and water flow reversing valves 20 disposed within the valve housing 10. The pressure-stabilizing backflow valve 100 of this application is applied to a water purifier 200, specifically to a water purifier 200 that can be used with an instant hot water dispenser. Figure 1 (As shown), of course, it can also be applied to other structures suitable for the pressure-regulating reflux valve 100.

[0070] The pressure-stabilizing reflux valve 100 has a first inlet 11, a first outlet 12, and a second outlet 13. Specifically, the first outlet 12, the first inlet 11, and the second outlet 13 are all located on the valve housing 10. The valve housing 10 also has an inner cavity, and the second inlet 14, the first outlet 12, the first inlet 11, and the second outlet 13 are all connected to the inner cavity. The water flow reversing valve 20 and the pressure-stabilizing structure 30 are both located in the inner cavity.

[0071] In a specific embodiment of this application, the first outlet 12 can discharge at least one of the following: raw water, a mixture of raw water and purified water from the main body 210 of the water purifier 200, or purified water from the main body 210 of the water purifier 200. It can serve as a mixed water outlet. The first outlet 12 is connected to the first inlet 2101 of the main body 210 of the water purifier 200. The first inlet 11 is used to introduce purified water from the main body 210 of the water purifier 200 and is connected to the outlet 2102 of the main body 210. The first inlet 11 can serve as a purified water inlet. The second outlet 13 is used to discharge the purified water introduced from the first inlet 11 and is connected to the second inlet 310 of the instant hot water dispenser 300. The second outlet 13 can serve as a purified water outlet. In other embodiments, the water flow characteristics of the first outlet 12, the first inlet 11, and the second outlet 13 can be adaptively adjusted and are not specifically limited.

[0072] The pressure-stabilizing reflux valve 100 also has a first water flow channel 15 connected at one end to the first outlet 12, a second water flow channel 16 connected to the first inlet 11 and the second outlet 13, and a third water flow channel 17 connected to the other end of the first inlet 11 and the first water flow channel 15. It can be understood that the raw water in the fourth water flow channel 18 and the pure water in the third water flow channel 17 are mixed in the first water flow channel 15 and then discharged from the mixing outlet 12. Specifically, the first water flow channel 15, the second water flow channel 16, and the third water flow channel 17 are all located within the inner cavity.

[0073] In a specific embodiment of this application, the first water flow channel 15 serves as a mixing water channel, the second water flow channel 16 serves as a first pure water channel, and the third water flow channel 17 serves as a second pure water channel.

[0074] The pressure stabilizing reflux valve 100 can simultaneously open the second water flow channel 16 and the third water flow channel 17.

[0075] Specifically, the water flow reversing valve 20 can simultaneously open the second water flow channel 16 and the third water flow channel 17.

[0076] In practical applications, when the instant hot water dispenser 300 takes water, the pressure stabilizing reflux valve 100 can simultaneously open the second water flow channel 16 and the third water flow channel 17. Part of the pure water from the water purifier 200 is delivered to the instant hot water dispenser 300 through the second water flow channel 16, and the other part of the excess pure water returns to the first water flow channel 15 through the third water flow channel 17 and is then discharged from the first outlet 12 for use by the water purifier 200.

[0077] In some embodiments, the pressure of the first water flow channel 15 of the pressure stabilizing reflux valve 100 can also be connected to an external water pump, and then connected to the first inlet 2101 of the main body 210 of the water purifier 200 through the water pump, wherein the water pressure of the external water pump can be controlled to be kept below a preset pressure value.

[0078] In the embodiments of this application, the pressure-stabilizing reflux valve 100 further includes a second inlet 14. Specifically, the second inlet 14 is located on the valve housing 10 and communicates with the inner cavity. The second inlet 14 is used to introduce raw water, i.e., tap water, and can serve as a raw water inlet or to introduce other water flows. The pressure-stabilizing reflux valve 100 also includes a fourth water flow channel 18 that connects the second inlet 14 to the other end of the first water flow channel 15. The fourth water flow channel 18 is located within the inner cavity. The fourth water flow channel 18 serves as a raw water channel. The pressure-stabilizing reflux valve 100 can shut off the fourth water flow channel 18 when the pressure in the first water flow channel 15 reaches a preset pressure value. Specifically, the pressure-stabilizing structure 30 can shut off the fourth water flow channel 18 when the pressure in the first water flow channel 15 reaches a preset pressure value.

[0079] In practical applications, if the pressure in the first water flow channel 15 reaches the preset pressure value, the pressure in the first water flow channel 15 can be reduced and kept below the preset pressure value by cutting off the water flow in the fourth water flow channel 18.

[0080] In this way, the water pressure of the first water flow channel 15 can be controlled without external equipment, and the water in the first water flow channel 15 can be mixed with the raw water and enter the water purifier 200 for reuse.

[0081] Therefore, the pressure-stabilizing backflow valve 100 of this application, by setting a third water flow channel 17, is used to guide the excess pure water flowing to the instant hot water dispenser 300 backflow, thereby reducing the pressure of the first water flow channel 15. Since the first water flow channel 15 is connected to the third water flow channel 17, and the third water flow channel 17 is connected to the first water inlet 11, the pressure of the first water flow channel 15 and the first water inlet 11 can be kept the same, that is, both can be kept below the preset pressure value. Therefore, it can avoid the pure water end pressure of the water purifier 200 from suddenly rising and falling, prevent the water purifier 200 from frequently starting and stopping, and improve the customer experience.

[0082] It should also be noted that the water flow reversing valve 20 of this application can also simultaneously shut off the second water flow channel 16 and the third water flow channel 17, thus preventing water supply to the instant hot water dispenser 300. The method of setting the water flow reversing valve 20 is simple and can quickly respond to the water supply needs of the instant hot water dispenser 300.

[0083] Please see Figure 2 and Figure 5Specifically, in the embodiments of this application, the valve housing 10 includes a housing body 101, a first end cap 102, and a second end cap 103. The first end cap 102 is fitted and connected to one end of the housing body 101 along its longitudinal direction, and the second end cap 103 is fitted and connected to the other end of the housing body 101 along its longitudinal direction. The first end cap 102 has a second water inlet 14, the second end cap 103 has a second water outlet 13, and the housing body 101 has a first water outlet 12 and a first water inlet 11. The water flow reversing valve 20 and the pressure stabilizing structure 30 are both disposed within the housing body 101.

[0084] Please see Figure 2 and Figure 3 In some embodiments, the water flow reversing valve 20 includes a valve seat 21 and a valve core 22. The valve seat 21 has a first sub-channel 211 and a second sub-channel 212. One end of the first sub-channel 211 is connected to a first inlet 11, and one end of the second sub-channel 21 is connected to a first water flow channel 15. The valve core 22 is movable relative to the valve seat 21 and includes a first position and a second position during the movement. When the valve core 22 is in the first position, the other end of the first sub-channel 211 is connected to a second outlet 13 to conduct the second water flow channel 16, and the other end of the second sub-channel 212 is connected to the first inlet 11 to conduct the third water flow channel 17. When the valve core 22 is in the second position, the other end of the first sub-channel 211 is isolated from the second outlet 13, and the other end of the second sub-channel 212 is isolated from the first inlet 11.

[0085] It should be noted that the second water flow channel 16 includes the first sub-channel 211, and the third water flow channel 17 includes the second sub-channel 212.

[0086] By setting a first sub-channel 211 and a second sub-channel 212 in the valve seat 21, and by moving the valve core 22 relative to the valve seat 21 to achieve the conduction of the second water flow channel 16 and the third water flow channel 17, the overall structure is not only simple, but the way to achieve the conduction and cut-off of the second water flow channel 16 and the third water flow channel 17 is also fast and reliable.

[0087] Specifically, the valve seat 21 is fixed in the inner cavity of the valve housing 10. The pressure stabilizing return valve 100 includes a first sealing ring 40 and a second sealing ring 45. The first sealing ring 40 and the second sealing ring 45 are spaced apart along the longitudinal direction of the valve seat 21 and seal between the valve seat 21 and the cavity wall of the inner cavity, thus defining and forming a first sealing cavity 104. One end of the first sub-channel 211 is connected to the first inlet 11 through the first sealing cavity 104.

[0088] Furthermore, the first sealing ring 40 is positioned further away from the second water outlet 13 than the second sealing ring 45. The inner cavity of the valve seat 21 and the valve housing 10 forms a space between the second sealing ring 45 and the second water outlet, allowing the valve core 22 to move. Thus, due to the sealing effect of the second sealing ring 45, the movement of the valve core 22 will not affect the connection between the first sub-channel 211 and the first water inlet 11. In other words, the first sub-channel 211 always remains connected to the first water inlet 11, thereby enabling a rapid response to the water supply needs of the instant hot water dispenser 300.

[0089] In some embodiments, when the valve core 22 is in the first position, the other end of the second sub-channel 212 is connected to the first inlet 11 through the first sub-channel 211.

[0090] In this way, by cutting off the first sub-channel 211, the first sub-channel 211 and the second outlet 13 can be isolated, and the second sub-channel 212 and the first inlet 11 can also be isolated. Therefore, the structure of the water flow reversing valve 20 is simplified and the reliability of isolating the two at the same time is improved.

[0091] Specifically, a connecting channel 105 is formed between the water flow reversing valve 20 and the inner wall of the valve housing 10. When the valve core 22 is in the first position, the connecting channel 105 connects the first sub-channel 211 and the second sub-channel 212, as well as the first sub-channel 211 and the second outlet 13. When the valve core 22 is in the second position, the connecting channel 105 is disconnected from the first sub-channel 211. It should be noted that part of the connecting channel 105 belongs to the second water flow channel 16, and part of it belongs to the third water flow channel 17.

[0092] In this way, the inner cavity of the valve housing 10 can be fully utilized to form a connecting channel 105, thereby satisfying the connection and cut-off of the first sub-channel 211 and the second sub-channel 212, as well as the connection and cut-off of the first sub-channel 211 and the second outlet 13.

[0093] Furthermore, the connecting channel 105 is formed on the side of the second sealing ring 45 away from the first sealing cavity 104. In this way, the connecting channel 105 and the first sealing cavity 104 can be separated, preventing pure water from the first water inlet 11 from directly entering the connecting channel 105 and affecting the conduction and cutoff of the second water flow channel 16 and the third water flow channel 17.

[0094] More specifically, the pressure-regulating reflux valve 100 includes a third sealing ring 50 and a fourth sealing ring 55. When the valve core 22 is in the second position, one end of the valve core 22 is sealed to the valve seat 21 through the third sealing ring 50, and the other end of the valve core 22 is located outside the valve seat 21 and is sealed to the cavity wall of the inner cavity through the fourth sealing ring 55. When the valve core 22 is in the first position, the valve core 22 is disengaged from the first sub-channel 211, and there is a gap between the fourth sealing ring 55 and the cavity wall of the inner cavity to define a portion of the communication channel 105. Optionally, one end of the valve core 22 can extend into the first sub-channel 211 to be sealed to the valve seat 21 through the third sealing ring 50.

[0095] More specifically, the inner cavity of the valve body 10 has a first cavity wall section and a second cavity wall section, which are spaced apart from each other, with the second cavity wall section being closer to the second outlet 13. The radial dimension of the first cavity wall section is smaller than that of the second cavity wall section, so that they form a stepped portion. When the valve core 22 is in the second position, the fourth sealing ring 55 seals between the valve core 22 and the first cavity wall section of the valve body 10. When the valve core 22 is in the first position, the fourth sealing ring 55 seals between the valve core 22 and the second cavity wall section of the valve body 10. At this time, a second sealing cavity 106 is formed between the fourth sealing ring 55 and the second sealing ring 45, and the second sealing cavity 106 is connected to the end of the second sub-channel 212 away from the first water flow channel 15.

[0096] In some embodiments, the pressure-regulating reflux valve 100 further includes a first elastic element 60, which is pre-pressed between the valve core 22 and the cavity wall of the valve housing 10 to provide a pre-tightening force that gives the valve core 22 a tendency to move from a first position toward a second position.

[0097] Thus, when the instant hot water dispenser 300 dispenses water, the pressure at the second outlet 13 decreases, causing the pressure in the first sub-channel 211 to exceed the pressure at the second outlet 13. At this point, the first elastic element 60 is compressed, and the valve core 22 moves from the second position to the first position to supply water. When the instant hot water dispenser 300 stops dispensing water, the pressure at the second outlet 13 continuously increases, and the first elastic element 60 returns to its original position, keeping the valve core 22 in the second position.

[0098] In the embodiments of this application, the water flow reversing valve 20 also has a pressure stabilizing channel 23, which maintains communication between the first inlet 11 and the second outlet 13. Specifically, the pressure stabilizing channel 23 includes a pressure stabilizing hole 221 formed on the valve core 22, one end of which is connected to the first sub-channel 211 and the other end of which is connected to the second outlet 13.

[0099] By setting up a pressure stabilizing channel 23, the pressure on both sides of the valve core 22 can be balanced when the instant hot water dispenser 300 stops dispensing water, thereby causing the valve core 22 to return to the second position.

[0100] It should be noted that the pressure stabilizing channel 23 is not the main channel for supplying pure water to the instant hot water dispenser 300. Its main function is to balance the pressure on both sides of the valve core 22 when the second water outlet 13 is not supplying water.

[0101] Preferably, the cross-sectional area of ​​the pressure stabilizing channel 23 is smaller than the cross-sectional area of ​​the second outlet 13.

[0102] To ensure smooth movement of the valve core 22, in this embodiment, the valve housing 10 further includes a guide tube 1031. One end of the guide tube 1031 has a second outlet 13, and the other end of the guide tube 1031 engages with the valve core 22 to guide its movement. Specifically, the second end cap 103 includes the guide tube 1031. Specifically, at least a portion of the valve core 22 extends into the guide tube 1031 to engage with it.

[0103] Furthermore, the first elastic element 60 is sleeved on the outside of the guide tube 1031, and the guide tube 1031 guides the first elastic element 60 to perform stretching and compression movements.

[0104] Furthermore, the guide pipe 1031 has a connecting hole 1031a in the radial direction. The connecting hole 1031a connects the connecting channel 105 and the inner cavity of the guide pipe 1031. Thus, pure water from the connecting channel 105 can be discharged to the second outlet 13 through the connecting hole 1031a.

[0105] In the embodiments of this application, the water flow reversing valve 20 further includes a one-way valve 24, which is located at one end of the second sub-channel 212 that connects to the first water flow channel 15. The one-way valve 24 is configured to unidirectionally guide the water flow from the first inlet 11 to the first water flow channel 15.

[0106] In this way, the raw water or mixed water entering the first water flow channel 15 can be prevented from entering the second sub-channel 212. Since the second sub-channel 212 is connected to the first water inlet 11, that is, connected to the first sub-channel 211, the raw water or mixed water is prevented from flowing to the second water outlet 13 and affecting the drainage of the second water outlet 13.

[0107] Please see Figures 2-4 In the embodiments of this application, the pressure stabilizing structure 30 is movable relative to the valve housing 10 to block or open the second inlet 14. When the pressure stabilizing structure 30 blocks the first inlet, the fourth water flow channel 18 is shut off. The method of directly blocking or opening the second inlet 14 through the pressure stabilizing structure 30 is simple and reliable.

[0108] Specifically, the valve housing 10 has a guide tube 1021, one end of which is provided with a second water inlet 14, and the other end is engaged with a pressure stabilizing structure 30. The pressure stabilizing structure 30 can move relative to the guide tube 1021 to block or open the other end of the guide tube 1021. Specifically, the first end cap 102 has a guide tube 1021.

[0109] More specifically, the voltage stabilizing structure 30 includes a sealing element 31, which is capable of sealing the other end of the conductive tube 1021.

[0110] In some embodiments, the pressure stabilizing structure 30 is sealed to the inner wall of the valve housing 10. The pressure stabilizing structure 30 has a conductive channel 32 inside, which connects the second inlet 14 and the first water flow channel 15 to define at least a portion of the fourth water flow channel 18. One end of the conductive pipe 1021 extends into the conductive channel 32 and cooperates with the pressure stabilizing structure 30. The sealing member 31 can be disposed within the conductive channel 32. When the pressure stabilizing structure 30 moves relative to the conductive pipe 1021, it can drive the sealing member 31 to block or open the end of the conductive pipe 1021 away from the first inlet 13. By setting the conductive pipe 1021 to extend into the interior of the pressure stabilizing structure 30 to cooperate with the sealing member 31 to block or open the first inlet 13, the method is simple and makes the structure of the pressure stabilizing backflow valve 100 simpler.

[0111] Furthermore, the pressure stabilizing structure 30 includes a pressure stabilizing base 33, and the pressure stabilizing return valve 100 also includes a fifth sealing element 65 and a sixth sealing element 70. The fifth sealing element 65 and the sixth sealing element 70 are spaced apart along the longitudinal direction of the pressure stabilizing structure 30. The fifth sealing element 65 seals the end of the pressure stabilizing base 33 and the valve housing 10 near the second water inlet 14, and the sixth sealing element 70 seals the end of the pressure stabilizing base 33 and the valve housing 10 near the first water flow channel 15.

[0112] Specifically, the fifth seal 65 is sealed between the conductive tube 1021 and the conductive channel 32.

[0113] In some embodiments, the sixth sealing element 70 is an elastic sealing diaphragm. One end of the elastic sealing diaphragm is sealed and fixedly connected to the pressure stabilizing base 33, and the other end is sealed and fixedly connected to the cavity wall of the inner cavity. When the pressure stabilizing structure 30 moves relative to the valve housing 10, the elastic sealing diaphragm can bend and deform.

[0114] Please see Figure 6 Specifically, the voltage stabilizer 33 includes a first voltage stabilizer 331 and a second voltage stabilizer 332. The first voltage stabilizer 331 is connected to the second voltage stabilizer 332, for example, the first voltage stabilizer 331 and the second voltage stabilizer 332 are threadedly connected. One end of the elastic sealing diaphragm is clamped between the first voltage stabilizer 331 and the second voltage stabilizer 332, and the other end of the elastic sealing diaphragm is clamped between the first end cap 102 and the shell body 101.

[0115] In the embodiments of this application, the first sealing ring 40, the second sealing ring 45, the third sealing ring 50, the fourth sealing ring 55, and the fifth sealing element 65 can all be O-rings. Since the raw water at the second inlet 14 has poor cleanliness, using an O-ring would increase friction, thus affecting the movement of the pressure stabilizing structure 30. By providing an elastic sealing diaphragm, both sides of the diaphragm can be fixed, and the movement of the pressure stabilizing structure 30 can be achieved through the bending deformation of the elastic sealing diaphragm, thus not affecting the movement of the pressure stabilizing structure 30.

[0116] Please see Figures 2-4 In some embodiments, the pressure stabilizing reflux valve 100 further includes a second elastic element 75, which is pre-pressed between the pressure stabilizing structure 30 and the cavity wall of the valve housing 10 to provide a pre-tightening force for the pressure stabilizing structure 30 to move from the position of blocking the second inlet 14 to the position of opening the second inlet 14.

[0117] Thus, when the pressure in the first water flow channel 15 reaches the preset pressure value, the second elastic element 75 is compressed, and the pressure stabilizing structure 30 moves relative to the valve housing 10 to close the fourth water flow channel 18. When the pressure in the first water flow channel 15 is less than the preset pressure value, the second elastic element 75 recovers, and the pressure stabilizing structure 30 moves relative to the valve housing 10 to open the fourth water flow channel 18.

[0118] Specifically, the second elastic element 75 is sleeved on the outside of the guide tube 1021, and the guide tube 1021 is used to guide the second elastic element 75 to perform stretching and compression movements.

[0119] In the embodiments of this application, both the first elastic element 60 and the second elastic element 75 are springs.

[0120] To facilitate understanding of this application, a specific embodiment is provided below as an example:

[0121] The critical pressure value for starting and stopping the water purifier 200 is 0.25 MPa, which is also the preset pressure value. When raw water is introduced into the second inlet 14, the pressure value at the second inlet 14 ranges from 0.05 MPa to 0.4 MPa. The starting pressure for the water purifier 200 to supply water to the instant hot water dispenser 300 is less than or equal to 0.15 MPa, meaning that the force exerted by the valve core 22 to overcome the elastic force of the first elastic element 60 relative to the valve seat 21 is less than or equal to 0.15 MPa. When the instant hot water dispenser 300 dispenses water, the valve core 22 can overcome the elastic force of the first elastic element 60 and move relative to the valve seat 21 to the first position. By connecting the second water flow channel 16 and the third water flow channel 17, the pressure in the second water flow channel 16 and the third water flow channel 17 continuously increases as water intake proceeds. This causes the pressure in the first water flow channel 15 to also increase, enabling the pressure stabilizing structure 30 to overcome the elastic force of the second elastic element 75 and move relative to the valve body 10. During this movement, the sealing element 31 gradually approaches the guide pipe 1201, and the flow rate of the raw water gradually decreases until the pressure in the first water flow channel 15 reaches 0.25 MPa. At this point, the sealing element 31 seals one end of the guide pipe 1201, thereby sealing the second water inlet 14. This keeps the pressure in the first water flow channel 15, the second water flow channel 16, and the third water flow channel 17 below 0.5 MPa.

[0122] When the hot water dispenser 300 stops dispensing water, the pressure stabilizing channel 23 of the water flow reversing valve 20 balances the pressure on both sides of the valve core 22, causing the valve core 22 to return to the second position under the elastic restoring force of the first elastic element 60, thereby shutting off the second water flow channel 16 and the third water flow channel 17. Since the third water flow channel 17 no longer supplies pressurized water to the first water flow channel 15, the pressure in the first water flow channel 15 decreases, and the second elastic element 75 generates an elastic restoring force, causing the pressure stabilizing structure 30 to move relative to the valve body 10. The sealing element 31 moves away from the guide pipe 1201, opening the second water inlet 14, thereby opening the fourth water flow channel 18.

[0123] Please see Figure 1 Based on the same inventive concept, this application also provides a water purifier 200, including the pressure stabilizing backflow valve 100 in any of the above embodiments.

[0124] Specifically, the water purifier 200 also includes a main body 210, and the first water outlet 12 and the first water inlet 11 are both connected to the main body 210.

[0125] The pressure-stabilizing reflux valve 100 and water purifier 200 provided in this application embodiment have the following beneficial effects:

[0126] By setting a third water flow channel 17, excess pure water flowing to the instant hot water dispenser 300 is guided back, reducing the pressure of the first water flow channel 15. Since the first water flow channel 15 is connected to the third water flow channel 17, and the third water flow channel 17 is connected to the first water inlet 11, the pressure of the first water flow channel 15 and the first water inlet 11 can be kept the same, that is, both can be kept below the preset pressure value. Therefore, it can avoid sudden high and low pressure at the pure water end of the water purifier 200, prevent frequent start and stop of the water purifier 200, and improve the customer experience.

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pressure stabilizing return valve (100) characterized by, The valve housing (10) has an inner cavity, a first water outlet (12), a first water inlet (11) and a second water outlet (13) which are all communicated with the inner cavity; The stable pressure backflow valve (100) further has a first water flow channel (15) which is communicated with the first water outlet (12), a second water flow channel (16) which is communicated with the first water inlet (11) and the second water outlet (13), and a third water flow channel (17) which is communicated with the first water inlet (11) and the other end of the first water flow channel (15); the water flow reversing valve (20), the first water flow channel (15), the second water flow channel (16) and the third water flow channel (17) are all arranged in the inner cavity. The water flow reversing valve (20) can simultaneously open or close the second water flow channel (16) and the third water flow channel (17).

2. The pressure-compensated return valve (100) according to claim 1, characterized in that The water flow reversing valve (20) comprises a valve seat (21) and a valve core (22), the valve seat (21) has a first sub-channel (211) and a second sub-channel (212), one end of the first sub-channel (211) is communicated with the first water inlet (11), and one end of the second sub-channel (212) is communicated with the first water flow channel (15). The valve core (22) can move relative to the valve seat (21) and has a first position and a second position during the movement; when the valve core (22) is located at the first position, the other end of the first sub-channel (211) is communicated with the second water outlet (13) to open the second water flow channel (16), and the other end of the second sub-channel (212) is communicated with the first water inlet (11) to open the third water flow channel (17); when the valve core (22) is located at the second position, the other end of the first sub-channel (211) is disconnected from the second water outlet (13), and the other end of the second sub-channel (212) is disconnected from the first water inlet (11).

3. The pressure-compensated return valve (100) according to claim 2, characterized in that When the valve core (22) is located at the first position, the other end of the second sub-channel (212) is communicated with the first water inlet (11) through the first sub-channel (211).

4. The pressure-compensated return valve (100) according to claim 3, characterized in that The water flow reversing valve (20) and the cavity wall of the inner cavity form a communication channel (105), when the valve core (22) is located at the first position, the communication channel (105) is communicated with the first sub-channel (211) and the second sub-channel (212) and the first sub-channel (211) and the second water outlet (13), when the valve core (22) is located at the second position, the communication channel (105) is disconnected from the first sub-channel (211).

5. The pressure-compensated return valve (100) according to claim 4, characterized in that The stable pressure backflow valve (100) further comprises a first sealing ring (40) and a second sealing ring (45), which are arranged along the longitudinal direction of the valve seat (21) and are sealed between the valve seat (21) and the cavity wall of the inner cavity, and define a first sealing cavity (104), one end of the first sub-channel (211) being communicated with the first water inlet (11) through the first sealing cavity (104); The first sealing ring (40) is arranged farther away from the second water outlet (13) than the second sealing ring (45), and the communication channel (105) is formed on the side of the second sealing ring (45) away from the first sealing cavity (104).

6. The pressure-compensated return valve (100) of claim 4, wherein The stable pressure backflow valve (100) comprises a third sealing ring (50) and a fourth sealing ring (55); when the valve core (22) is in the second position, one end of the valve core (22) is sealed and connected with the valve seat (21) through the third sealing ring (50), and the other end of the valve core (22) is located outside the valve seat (21) and is sealed and connected with the cavity wall of the inner cavity through the fourth sealing ring (55); when the valve core (22) is in the first position, the valve core (22) is separated from the first sub-channel (211), and there is a gap between the fourth sealing ring (55) and the cavity wall of the inner cavity to define part of the communication channel (105).

7. The pressure-compensated return valve (100) of claim 2, wherein The stable pressure backflow valve (100) further comprises a first elastic member (60) pre-pressed between the valve core (22) and the cavity wall of the inner cavity, for providing a pre-tightening force for the valve core (22) to have a movement tendency from the first position to the second position.

8. The pressure-compensated return valve (100) of claim 1, wherein The water flow reversing valve (20) further has a stable pressure channel (23) keeping the first water inlet (11) and the second water outlet (13) communicated.

9. The pressure-compensated return valve (100) of claim 2, wherein, The water flow reversing valve (20) further comprises a one-way valve (24) arranged at one end of the second sub-channel (212) communicated with the first water flow channel (15), and the one-way valve (24) is configured to allow water flow from the first water inlet (11) to the first water flow channel (15) in one direction.

10. The pressure-compensated return valve (100) of claim 1, wherein The stable pressure backflow valve (100) further has a second water inlet (14) and a fourth water flow channel (18) communicated between the second water inlet (14) and the other end of the first water flow channel (15); The stable pressure backflow valve (100) can cut off the fourth water flow channel (18) when the pressure of the first water flow channel (15) reaches a preset pressure value.

11. The pressure-compensated return valve (100) according to claim 10, characterized in that The stable pressure backflow valve (100) further comprises a stable pressure structure (30); The stable pressure structure (30) is configured to cut off the fourth water flow channel (18) when the pressure of the first water flow channel (15) reaches the preset pressure value.

12. The pressure-compensated return valve (100) of claim 11, characterized in that The stable pressure backflow valve (100) comprises a valve housing (10) having an inner cavity and the second water inlet (14), the first water outlet (12), the first water inlet (11) and the second water outlet (13) all communicating with the inner cavity; The stable pressure structure (30), the fourth water flow channel (18), the first water flow channel (15), the second water flow channel (16) and the third water flow channel (17) are all arranged in the inner cavity, and the stable pressure structure (30) is movable relative to the valve housing (10) to block or open the second water inlet (14), and when the stable pressure structure (30) blocks the second water inlet (14), the fourth water flow channel (18) is cut off.

13. The pressure-compensated return valve (100) of claim 12, characterized in that The stable pressure backflow valve (100) further comprises a second elastic member (75) pre-pressed between the stable pressure structure (30) and the cavity wall of the inner cavity, for providing a pre-tightening force for the stable pressure structure (30) to have a movement tendency from a position of self-blocking the second water inlet (14) to a position of opening the second water inlet (14).

14. The pressure-compensated return valve (100) of claim 12, wherein, The stable pressure structure (30) comprises a stable pressure seat (33) and an elastic sealing diaphragm, one end of the elastic sealing diaphragm being sealingly and fixedly connected with the stable pressure seat (33), and the other end being sealingly and fixedly connected with the cavity wall of the inner cavity; The stable pressure seat (33) is movable relative to the valve housing (10), and the elastic sealing diaphragm is bendable and deformable.

15. The pressure-compensated return valve (100) of claim 12, wherein, The valve housing (10) has a guide-through pipe (1021), the stable pressure structure (30) has a guide-through channel (32) inside, the stable pressure structure (30) further comprises a blocking member (31) arranged in the guide-through channel (32), one end of the guide-through pipe (1021) is provided with the second water inlet (14), and the other end is arranged to extend into the guide-through channel (32) and cooperate with the stable pressure structure (30); The stable pressure structure (30) is movable relative to the guide-through pipe (1021) to drive the blocking member (31) to block or open one end of the guide-through pipe (1021) away from the second water inlet (14).

16. A water purifier (200) characterized by comprising: The body has a first inlet (2101) and an outlet (2102), the first inlet (2101) communicates with the first water outlet (12), and the outlet (2102) communicates with the first water inlet (11). The body has a first inlet (2101) and an outlet (2102), the first inlet (2101) communicates with the first water outlet (12), and the outlet (2102) communicates with the first water inlet (11).

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