On-off valve, wastewater valve assembly, and water purification apparatus

Abstract

The present application relates to water purification equipment technical field, specifically to a kind of on-off valve, wastewater valve assembly and water purification equipment.The on-off valve includes: valve body, with first chamber, second chamber and third chamber, second chamber is communicated with first chamber, first chamber has first inlet and outlet water port and second inlet and outlet water port, second chamber is communicated with second inlet and outlet water port, third chamber is communicated with second chamber;Sealing elastic part is arranged in second chamber and is suitable for providing the elastic force of sealing second inlet and outlet water port, and the sealing elastic part is opened or sealed second inlet and outlet water port by the water pressure change in first chamber.The present application realizes the sealing of wastewater valve by on-off valve, avoids that wastewater is discharged by wastewater valve when water purification equipment stops water production;When user takes pure water, opening faucet will immediately water, and user does not need waiting time when taking water, improve user experience.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, specifically to an on / off valve, a wastewater valve assembly, and a water purification device. Background Technology

[0002] Currently, common water purification equipment such as water purifiers includes RO membranes and wastewater solenoid valves. The wastewater solenoid valve consists of a valve body and a valve needle. The valve body has a wastewater orifice, which is cleaned by the up-and-down movement of the valve needle. The wastewater flow rate is calculated based on the gap between the valve needle and the wastewater orifice, or the diameter of the wastewater orifice through which the valve needle moves. Due to the design requirements for scale buildup and the gap between the valve needle and the wastewater orifice, the wastewater orifice is designed to be relatively large. This allows the valve needle to move normally, ensuring the wastewater flow rate meets design requirements and that wastewater is effectively discharged, thus extending the lifespan of the RO membrane. However, this design creates a gap between the valve needle and the wastewater orifice. Because the pressure of the RO membrane is greater than atmospheric pressure, wastewater from the RO membrane flows out through this gap, preventing the wastewater solenoid valve from sealing properly. Consequently, when dispensing pure water, the faucet may not dispense water for the first few seconds, affecting the user experience. RO stands for Reverse Osmosis. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that when the water purification equipment stops producing water, the wastewater in the RO membrane is discharged through the gap between the valve needle and the wastewater hole, resulting in no water being produced at the beginning when pure water is taken out, thereby providing an on / off valve, a wastewater valve assembly and a water purification equipment.

[0004] To address the aforementioned problems, the present invention provides an on / off valve, comprising: a valve body having a first chamber, a second chamber, and a third chamber, the second chamber communicating with the first chamber, the first chamber having a first inlet / outlet and a second inlet / outlet, the second chamber communicating with the second inlet / outlet, and the third chamber communicating with the second chamber; and a sealing elastic part disposed in the second chamber and adapted to provide an elastic force for sealing the second inlet / outlet, wherein the sealing elastic part is opened or sealed by a change in water pressure in the first chamber.

[0005] Optionally, the second chamber extends outward from the side of the first chamber toward the first chamber to form a water flow chamber, and the third chamber is connected to the water flow chamber. The water pressure change in the third chamber causes the sealing elastic part to open or seal the second inlet and outlet.

[0006] Optionally, the sealing elastic part includes: a sealing ring, which seals against the inner wall of the second chamber; and an elastic element, one end of which engages with the side of the sealing ring away from the second inlet and outlet, and the other end of which is fixed relative to the valve body. The elastic element provides the sealing ring with an elastic force to seal the second inlet and outlet.

[0007] Optionally, the sealing elastic part also includes a limiting member, which is fixed to the side of the second chamber away from the second inlet and outlet, and the elastic member is located between the sealing ring and the limiting member.

[0008] Optionally, the limiting element includes a pressure cylinder and a fixing sleeve. The fixing sleeve is fixed on the side of the second chamber away from the second inlet and outlet. The elastic element is disposed between the sealing ring and the pressure cylinder, and the fixing sleeve is sleeved on the outside of the pressure cylinder.

[0009] Optionally, the third chamber has a third inlet and outlet, the first inlet and outlet being adapted to be connected to the wastewater outlet of the water treatment unit, and the third inlet and outlet being adapted to be connected to the inlet of the wastewater valve; or, the first inlet and outlet being adapted to be connected to the inlet of the wastewater valve, and the third inlet and outlet being adapted to be connected to the wastewater outlet of the water treatment unit.

[0010] Optionally, the first chamber includes a first water hole and a second water hole that are connected to each other. The extension direction of the first water hole is at an angle to the extension direction of the second water hole. The end of the first water hole away from the second water hole forms a first inlet and outlet, and the end of the second water hole away from the first water hole forms a second inlet and outlet. The extension direction of the third chamber is the same as the extension direction of the second water hole.

[0011] Optionally, the on / off valve may also include a fourth chamber, which is connected to the third chamber. The fourth chamber has a fourth inlet and outlet, which are adapted to be connected to the raw water branch.

[0012] The present invention also provides a wastewater valve assembly, comprising: a wastewater valve and the aforementioned on / off valve, wherein the outlet of the on / off valve is connected to the inlet of the wastewater valve.

[0013] The present invention also provides a water purification device, including the above-mentioned wastewater valve assembly.

[0014] The present invention has the following advantages:

[0015] 1. Connect the first inlet and outlet of the on / off valve to the wastewater outlet of the water treatment unit. Connect the third chamber of the on / off valve to the inlet of the wastewater valve. When the water purification equipment produces water, wastewater enters the first chamber. When the water pressure in the first chamber is greater than the elastic force of the sealing elastic part, the water pressure in the first chamber pushes the sealing elastic part to move away from the second inlet and outlet, thus opening the second inlet and outlet. At this time, the part of the second chamber located on the side of the sealing elastic part facing the first chamber is connected to the first chamber. Wastewater flows into the second chamber after passing through the part of the second chamber connected to the first chamber. In the third chamber, the water flows into the wastewater valve. When the water purifier stops producing water, the water pressure in the first chamber decreases. The elastic force of the sealing elastic part is greater than the water pressure in the first chamber, so the sealing elastic part moves towards the second inlet and outlet and seals the second inlet and outlet. At this time, the wastewater cannot flow into the third chamber and therefore cannot flow into the wastewater valve. The wastewater valve is sealed by the on / off valve to prevent wastewater from being discharged through the wastewater valve when the water purifier stops producing water. When the user wants to take pure water, the tap will open and the water will come out immediately. The user does not need to wait when taking water, which improves the user experience.

[0016] 2. The water pressure change in the third chamber causes the sealing elastic part to open or seal the second inlet and outlet. The third chamber has a third inlet and outlet. The first inlet and outlet serve as the inlet of the on-off valve, and the third inlet and outlet serve as the outlet of the on-off valve. Alternatively, the first inlet and outlet serve as the outlet of the on-off valve, and the third inlet and outlet serve as the inlet of the on-off valve. In this case, the inlet and outlet of the on-off valve are one, and the on-off valve can achieve bidirectional sealing, thus having a wider range of applications.

[0017] 3. Applying elastic force to the sealing ring through the elastic element ensures a more reliable seal when the sealing ring seals the second inlet and outlet. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A top view schematic diagram of an on / off valve according to an embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 A schematic cross-sectional view of the on / off valve along line AA;

[0021] Figure 3 It shows Figure 2 A cross-sectional view of the on / off valve with the sealing ring open at the second inlet / outlet.

[0022] Figure 4 It shows Figure 1 A cross-sectional view of the valve body of the on / off valve;

[0023] Figure 5 It shows Figure 1 A rear view diagram of the on / off valve.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Valve body; 11. First chamber; 111. First inlet / outlet; 112. Second inlet / outlet; 12. Second chamber; 121. Outer section; 122. Inner section; 123. Water flow chamber; 124. Annular groove; 13. Third chamber; 131. Third inlet / outlet; 14. Fourth chamber; 141. Fourth inlet / outlet; 20. Sealing elastic part; 21. Sealing ring; 22. Elastic element; 23. Limiting element; 231. Fixing sleeve; 232. Pressure cylinder. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] In existing technology, when water purification equipment stops producing water, the wastewater in the RO membrane is discharged through the gap between the valve needle and the wastewater hole, making the pressure on the side of the RO membrane where the wastewater is located equal to atmospheric pressure. When taking pure water, it takes a few seconds for the pressure on the side of the RO membrane where the wastewater is located to exceed atmospheric pressure. Only when the pressure on the side of the RO membrane where the wastewater is located exceeds atmospheric pressure will the faucet start to dispense water. Therefore, when taking pure water, there is a situation where the faucet does not dispense water at first, and users need to wait a few seconds to get water, resulting in a poor user experience.

[0031] To solve the above problems, such as Figures 1 to 3 As shown, the on / off valve of this embodiment includes a valve body 10 and a sealing elastic part 20. The valve body 10 has a first chamber 11, a second chamber 12, and a third chamber 13. The second chamber 12 communicates with the first chamber 11. The first chamber 11 has a first inlet / outlet 111 and a second inlet / outlet 112. The second chamber 12 communicates with the second inlet / outlet 112. The third chamber 13 communicates with the second chamber 12. The sealing elastic part 20 is disposed in the second chamber 12 and is adapted to provide an elastic force for sealing the second inlet / outlet 112. The sealing elastic part 20 opens or seals the second inlet / outlet 112 due to changes in water pressure in the first chamber 11. It should be noted that the on / off valve is used in a water purification device. The first inlet / outlet 111 of the on / off valve is connected to the wastewater outlet of the water treatment unit, and the third chamber 13 of the on / off valve is connected to the inlet of the wastewater valve.

[0032] Using the on / off valve of this embodiment, the first inlet / outlet 111 of the on / off valve is connected to the wastewater outlet of the water treatment unit, and the third chamber 13 of the on / off valve is connected to the inlet of the wastewater valve. When the water purification equipment produces water, wastewater enters the first chamber 11. When the water flow pressure in the first chamber 11 is greater than the elastic force of the sealing elastic part 20, the water flow pressure in the first chamber 11 pushes the sealing elastic part 20 to move away from the second inlet / outlet 112, thus opening the second inlet / outlet 112. At this time, the portion of the second chamber 12 located on the side of the sealing elastic part 20 facing the first chamber 11 is connected to the first chamber 11, and wastewater flows through the portion connected to the first chamber 11. A portion of the water from the second chamber 12 flows into the third chamber 13, and then into the wastewater valve. When the water purifier stops producing water, the water pressure in the first chamber 11 decreases. The elastic force of the sealing elastic part 20 is greater than the water pressure in the first chamber 11, causing the sealing elastic part 20 to move toward the second inlet / outlet 112 and seal it. At this time, wastewater cannot flow into the third chamber 13, and therefore cannot flow into the wastewater valve. The wastewater valve is sealed by the on / off valve, preventing wastewater from being discharged through the wastewater valve when the water purifier stops producing water. When the user wants pure water, the tap will open immediately, eliminating the need for waiting time and improving the user experience.

[0033] In this embodiment, as Figures 2 to 4 As shown, the second chamber 12 extends outward from the side facing the first chamber 11 to form a water flow chamber 123. The third chamber 13 communicates with the water flow chamber 123. Water pressure changes in the third chamber 13 cause the sealing elastic part 20 to open or seal the second inlet / outlet 112. The third chamber 13 has a third inlet / outlet 131. The first inlet / outlet 111 serves as the inlet of the on / off valve, and the third inlet / outlet 131 serves as the outlet of the on / off valve. Alternatively, the first inlet / outlet 111 serves as the outlet of the on / off valve, and the third inlet / outlet 131 serves as the inlet of the on / off valve. In this case, the inlet and outlet of the on / off valve are one, allowing for bidirectional sealing and a wider range of applications. Specifically, the water flow chamber 123 is an annular cavity or an arc-shaped cavity, etc.

[0034] In this embodiment, as Figure 2 and Figure 3As shown, the sealing elastic part 20 includes a sealing ring 21 and an elastic element 22. The sealing ring 21 is sealed to the inner wall of the second chamber 12. One end of the elastic element 22 engages with the side of the sealing ring 21 away from the second inlet / outlet 112, and the other end of the elastic element 22 is fixed relative to the valve body 10. The elastic element 22 provides the sealing ring 21 with an elastic force to seal the second inlet / outlet 112, that is, the elastic element 22 provides the sealing ring 21 with an elastic force toward the second inlet / outlet 112. By applying an elastic force to the sealing ring 21 through the elastic element 22, the sealing of the second inlet / outlet 112 by the sealing ring 21 can be ensured to be more reliable. Specifically, the elastic element 22 is a spring, an elastic sleeve, or an elastic column, etc. It can be understood that, as an alternative implementation, the elastic element 22 may not be provided, and the sealing ring 21 itself is elastic, which can also achieve the sealing of the second inlet / outlet 112.

[0035] In this embodiment, the sealing elastic part 20 further includes a limiting member 23, which is fixed to the side of the second chamber 12 away from the second inlet / outlet 112. The elastic member 22 is located between the sealing ring 21 and the limiting member 23. The limiting member 23 limits the other end of the elastic member 22, which also facilitates the assembly of the sealing ring 21 and the elastic member 22.

[0036] In this embodiment, as Figure 2 and Figure 3 As shown, the limiting member 23 includes a pressure cylinder 232 and a fixing sleeve 231. The fixing sleeve 231 is fixed to the side of the second chamber 12 away from the second inlet / outlet 112. The elastic member 22 is disposed between the sealing ring 21 and the pressure cylinder 232. The fixing sleeve 231 is sleeved on the outside of the pressure cylinder 232. The pressure cylinder 232 is used to press down on the outer part of the sealing ring 21, and the fixing sleeve 231 is used to fix the position of the pressure cylinder 232. Specifically, the fixing sleeve 231 is threadedly connected to the side of the second chamber 12 away from the second inlet / outlet 112. At this time, the outer wall of the fixing sleeve 231 and the side of the second chamber 12 away from the second inlet / outlet 112 are both provided with threads. One end of the fixing pressure cylinder 232 is an open end and the other end is a closed end. The open end is suitable for pressing down on the outer part of the sealing ring, and the closed end is disposed away from the sealing ring. The other end of the elastic member 22 abuts against the closed end. It is understood that, as an alternative implementation, the pressure cylinder 232 and the fixing sleeve 231 can also be integrally molded into a single part, which can be referred to as a cover.

[0037] Specifically, the outer wall of the pressure cylinder 232 and the inner wall of the fixing sleeve 231 are both stepped with the outer diameter increasing from the outside to the inside. When the fixing sleeve 231 is fixed on the valve body, the pressure cylinder 232 can be fixed in the second chamber. The pressure cylinder 232 does not need to be fixed on the valve body, and the fixing method is simple.

[0038] In this embodiment, the first inlet / outlet 111 is adapted to communicate with the wastewater outlet of the water treatment unit, and the third chamber 13 has a third inlet / outlet 131. The third inlet / outlet 131 is adapted to communicate with the inlet of the wastewater valve, or the first inlet / outlet 111 is connected to the inlet of the wastewater valve, and the third inlet / outlet 131 is adapted to communicate with the wastewater outlet of the water treatment unit, so that the on / off valve can achieve bidirectional sealing.

[0039] In this embodiment, the first chamber 11 includes a first water hole and a second water hole that are connected to each other. The extending direction of the first water hole is at an angle to the extending direction of the second water hole. The end of the first water hole away from the second water hole forms a first inlet / outlet 111, and the end of the second water hole away from the first water hole forms a second inlet / outlet 112. The extending direction of the third chamber 13 is the same as the extending direction of the second water hole. The end of the first chamber 11 near the second chamber 12 and the end of the third chamber 13 near the second chamber 12 are arranged parallel to each other. The first chamber 11 is configured with two water holes at an angle to each other, which facilitates connection with other components. Specifically, the first water hole and the second water hole are arranged perpendicularly. It can be understood that, as an alternative implementation, the first chamber 11 only includes the first water hole and does not include the second water hole, and the extending direction of the first water hole is the same as the extending direction of the third water hole.

[0040] It should be noted that the extension direction of the third chamber 13 is the direction of the water flow within it.

[0041] In this embodiment, as Figure 2 and Figure 3 As shown, the on / off valve also includes a fourth chamber 14, which is connected to the third chamber 13. The fourth chamber 14 has a fourth inlet / outlet 141, which is suitable for connection to the raw water branch. The fourth inlet / outlet 141 can serve as the inlet or outlet of the on / off valve. Part of the wastewater is diverted to the raw water branch through the fourth chamber 14, achieving wastewater utilization and improving the wastewater recovery rate. It is understood that, as an alternative implementation, the fourth chamber 14 may not be provided.

[0042] Specifically, the extension direction of the fourth chamber 14 is perpendicular to the extension direction of the third chamber 13, and the extension direction of the fourth chamber 14 is the same as the extension direction of the first water hole. The fourth chamber 14 and the first chamber 11 are located on the same side of the third chamber 13, making the arrangement of the on / off valve compact and space-saving. The extension direction of the fourth chamber 14 is the direction of wastewater flow within it. It can be understood that the fourth chamber 14 and the first chamber 11 are located on different sides of the third chamber 13.

[0043] In this embodiment, the second chamber has an outer bore section 121, an inner bore section 122, and a water flow chamber arranged sequentially from the outside to the inside. The outer diameter of the outer bore section 121 is larger than the outer diameter of the inner bore section 122. An annular groove 124 is provided on the stepped surface connecting the outer bore section 121 and the inner bore section 122. The sealing ring includes an outer ring body, an inner ring body, and a bent body connecting the outer ring body and the inner ring body. The outer ring body is located in the annular groove 124. The inner ring body fits with the hole wall of the inner bore section 122 and seals the second inlet and outlet. The inner ring body has a first protrusion on the side facing the limiting member, and the limiting member 23 has a second protrusion on the side facing the sealing ring. One end of the spring is sleeved on the first protrusion, and the other end of the spring is sleeved on the second protrusion. The cross-sectional shape of the bent body is U-shaped. It is understood that the first and second protrusions may not be provided.

[0044] It should be noted that the inlet and outlet of the on / off valve can be designed as one or more, that is, one inlet and one outlet, multiple inlets and one outlet, one inlet and multiple outlets, or multiple inlets and multiple outlets, and are not limited to the above-mentioned one inlet and two outlets or two inlets and one outlet.

[0045] The present invention also provides a wastewater valve assembly, which includes a wastewater valve and the aforementioned on / off valve, wherein the outlet of the on / off valve is connected to the inlet of the wastewater valve.

[0046] The present invention also provides a water purification device, which includes the above-mentioned wastewater valve assembly.

[0047] In this embodiment, the water purification equipment also includes a water treatment unit, etc., which includes one or more of the following: RO membrane filter, ultrafiltration membrane filter, ceramic membrane filter, and nanofiltration membrane filter. The wastewater valve assembly includes a wastewater valve and an on / off valve, such as... Figures 1 to 5 As shown, the on / off valve includes a valve body 10, a sealing ring 21, a spring, etc. The valve body 10 has a first chamber 11, a second chamber 12, a third chamber 13, and a fourth chamber 14. The third chamber 13 is connected to the first chamber 11 through the second chamber 12. The third chamber 13 and the fourth chamber 14 serve as the outlet chamber, and the first chamber 11 serves as the inlet chamber. Conversely, the third chamber 13 and the fourth chamber 14 can also serve as the inlet chamber, and the first chamber 11 serves as the outlet chamber. The second chamber 12 is equipped with a sealing ring 21, a spring, and a limiting member 23, which serve as the sealing elastic part. The third chamber 13 is connected to the inlet of the wastewater valve of the water purification equipment, the fourth chamber 14 is connected to the raw water branch of the water purification equipment, and the wastewater outlet of the RO filter element is connected to the first chamber 11. Automatic sealing is achieved by changing the water pressure generated by the water purification equipment itself, that is, by changing the pressure in the first chamber 11 or the third chamber 13 to achieve automatic sealing of the on / off valve.

[0048] The following is combined with Figure 2 and Figure 3 Instructions for using water purification equipment:

[0049] When the water purification equipment is producing water normally (such as...) Figure 3 As shown, due to the spring's design and its elastic force, when the water pressure in the first chamber 11 exceeds the spring's elastic force, the water pressure pushes the sealing ring 21 to move to the right against the spring's elastic force. The pressure cylinder 232 is limited by the fixed sleeve 231, and the sealing ring 21 moves to the right away from the sealing surface at the second inlet / outlet, thus automatically releasing the seal. Water flows through the water flow chamber 123 into the third chamber 13, and then through the third chamber 13 and the fourth chamber 14 to discharge wastewater, allowing the water purification equipment to produce water normally. The fourth chamber 14 is connected to the raw water branch, enabling wastewater utilization and improving the wastewater recovery rate.

[0050] When the water purification equipment stops producing water (e.g.) Figure 2 As shown, the water pressure in the first chamber 11 decreases, the sealing ring 21 is reset by the elastic force of the spring, and the sealing ring 21 moves to the left to achieve dynamic sealing of the water flow chamber.

[0051] The automatic sealing of the on / off valve is achieved by changing the chamber pressure based on the principle of the water purification equipment itself. This enables automatic unsealing during water production and dynamic sealing when water production is not in progress, ensuring the sealing of the second inlet and outlet. Wastewater will not be discharged through the wastewater hole of the next stage structure, effectively solving the problem of no water being discharged at the beginning of water intake. At the same time, the multiple outlets of the on / off valve can allow some wastewater to flow back to the raw water end, realizing wastewater recycling, improving the recovery rate, and saving water resources.

[0052] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0053] 1. The on / off valve includes a valve body 10, a sealing ring 21, a spring, a limiting member 23, etc. The valve body 10 has a first chamber 11, a second chamber 12, a third chamber 13, and a fourth chamber 14. The third chamber 13 communicates with the first chamber 11 through the second chamber 12. The sealing ring 21 is mounted on the second chamber 12, and the limiting member 23 is mounted on the end of the second chamber 12. The sealing ring 21 is tightly fitted with the inner wall of the second chamber to ensure a seal. The spring is mounted between the sealing ring 21 and the limiting member 23, and the sealing ring 21 forms a seal with the inner wall of the second chamber 12. The sealing ring 21 forms a dynamic seal with the second inlet / outlet 112. The sealing ring 21 can move back and forth in the second chamber 12. The sealing ring 21 and the spring are fixed by the limiting member 23 in the second chamber 12. The movement of the sealing ring 21 is adjusted by the change of water pressure in the first chamber 11 or the third chamber 13 to achieve the sealing and conduction of the on-off valve. The on-off valve has low cost and simple structure. It can effectively solve the problem of wastewater being discharged through the wastewater end and no water being drawn when pure water is started. It can also realize the recycling of some wastewater and bidirectional sealing, and improve the wastewater recovery rate.

[0054] 2. The spring is assembled on the first protrusion of the sealing ring 21 and the second protrusion of the limiting member 23. The two ends of the spring abut against the sealing ring 21 and the limiting member 23 respectively. The sealing ring 21, the spring and the limiting member are coaxially arranged, which is easy to assemble. The spring and the sealing ring can effectively seal with the first chamber and the third chamber to achieve side sealing.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An on / off valve, characterized in that, include: The valve body (10) has a first chamber (11), a second chamber (12) and a third chamber (13). The second chamber (12) is connected to the first chamber (11). The first chamber (11) has a first inlet and outlet (111) and a second inlet and outlet (112). The second chamber (12) is connected to the second inlet and outlet (112). The third chamber (13) is connected to the second chamber (12). A sealing elastic part (20) is disposed in the second chamber (12) and adapted to provide an elastic force for sealing the second inlet / outlet (112); the second chamber (12) extends outward from the first chamber (11) on the side facing the first chamber (11) to form a water flow chamber (123), and the third chamber (13) communicates with the water flow chamber (123); the sealing elastic part (20) opens or seals the second inlet / outlet (112) by the water pressure change in the first chamber (11) or the third chamber (13); The third chamber (13) has a third inlet and outlet (131), the first inlet and outlet (111) is adapted to be connected to the wastewater outlet of the water treatment unit, the third inlet and outlet (131) is adapted to be connected to the inlet of the wastewater valve, or the first inlet and outlet (111) is adapted to be connected to the inlet of the wastewater valve, and the third inlet and outlet (131) is adapted to be connected to the wastewater outlet of the water treatment unit; The first chamber (11) includes a first water hole and a second water hole that are connected. The extension direction of the first water hole is at an angle to the extension direction of the second water hole. The end of the first water hole away from the second water hole forms the first inlet / outlet (111), and the end of the second water hole away from the first water hole forms the second inlet / outlet (112). The extension direction of the third chamber (13) is the same as the extension direction of the second water hole. The first chamber (11) is arranged parallel to the end of the second chamber (12) and the end of the third chamber (13) is arranged parallel to the end of the second chamber (12), and the first chamber (11) is arranged as two water holes at an angle; the first water hole and the second water hole are arranged perpendicularly. The on / off valve also includes a fourth chamber (14), which is connected to the third chamber (13). The fourth chamber (14) has a fourth inlet / outlet (141), which is adapted to be connected to the raw water branch.

2. The on / off valve according to claim 1, characterized in that, The sealing elastic part (20) includes: The sealing ring (21) is in sealing fit with the inner wall of the second chamber (12); The elastic element (22) has one end engaged with the sealing ring (21) on the side away from the second inlet / outlet (112), and the other end of the elastic element (22) is fixed relative to the valve body (10). The elastic element (22) provides the sealing ring (21) with elastic force to seal the second inlet / outlet (112).

3. The on / off valve according to claim 2, characterized in that, The sealing elastic part (20) further includes a limiting member (23), which is fixed on the side of the second chamber (12) away from the second inlet / outlet (112), and the elastic member (22) is located between the sealing ring (21) and the limiting member (23).

4. The on / off valve according to claim 3, characterized in that, The limiting member (23) includes a pressure cylinder (232) and a fixing sleeve (231). The fixing sleeve (231) is fixed on the side of the second chamber (12) away from the second inlet / outlet (112). The elastic member (22) is disposed between the sealing ring (21) and the pressure cylinder (232). The fixing sleeve (231) is sleeved on the outside of the pressure cylinder (232).

5. A wastewater valve assembly, characterized in that, include: The wastewater valve and the on / off valve according to any one of claims 1 to 4, wherein the first inlet / outlet (111) or the third inlet / outlet (131) of the on / off valve is connected to the inlet of the wastewater valve.

6. A water purification device, characterized in that, include: The wastewater valve assembly as described in claim 5.

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