Flow valve and waterway system

Abstract

The utility model provides a flow valve and a waterway system, the flow valve comprises a valve body, a valve core and an elastic element, the surface of the valve body is provided with a water inlet and a water outlet, the valve body is internally provided with a valve cavity, the inner wall of the valve cavity is provided with an inclined groove, the groove obliquely extends along the axial direction of the valve body, and the inner diameter of the groove is gradually reduced along the water flow direction. The side wall, close to the water inlet, of the valve cavity is a valve seat, a sealing opening is formed in the valve seat, the water inlet is communicated with the water outlet through the sealing opening and the valve cavity, the valve element is slidably arranged in the valve cavity in the axial direction of the valve body, the two ends of the elastic element are connected to the valve element and the valve body respectively, and the elastic element exerts acting force enabling the valve element to abut against the sealing opening of the valve seat. According to the flow valve, the groove is obliquely formed in the valve cavity in the axial direction of the valve body, the inner diameter of the groove is gradually reduced in the water flow direction, when the valve element slides in the valve cavity, the flux between the valve element and the valve body can be changed due to the change of the inner diameter of the groove, and the purpose of adjusting the flow of the water outlet is achieved.

Description

Technical Field

[0001] This utility model relates to a flow valve and a water circuit system. Background Technology

[0002] As water purification equipment becomes increasingly common in homes, devices that only purify water are no longer sufficient to meet the needs of some users. Users want purified water that is safe and retains its minerals. Different groups have different requirements for the mineral content of water. For example, young children and the elderly need to supplement their bodies with more minerals, so they require water containing more minerals. Meanwhile, some young people, who are generally healthy and have high standards for the taste of water, prefer water with as few ions as possible to ensure a good taste. Traditional water purification equipment has a wastewater ratio solenoid valve in the wastewater passage, with a fixed orifice size that cannot be adjusted. This results in a relatively stable TDS (Total Dissolved Solids) level in the purified water, with minimal deviation, making it difficult to meet diverse needs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a flow valve and water circuit system.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A flow valve includes a valve body, a valve core, and an elastic element. The valve body has an inlet and an outlet on its surface, and a valve cavity inside the valve body. The inner wall of the valve cavity has an inclined groove that extends obliquely along the axial direction of the valve body. The inner diameter of the groove gradually decreases along the water flow direction. The side wall of the valve cavity near the inlet is a valve seat with a sealing port. The inlet communicates with the outlet through the sealing port, the valve cavity, and the outlet. The valve core slides in the valve cavity along the axial direction of the valve body. The two ends of the elastic element are connected to the valve core and the valve body, respectively. The elastic element applies a force that causes the valve core to abut against the sealing port of the valve seat.

[0006] In this design, the flow valve has a groove inclined along the axial direction of the valve body inside the valve cavity, and the inner diameter of the groove gradually decreases along the water flow direction. When the valve core slides inside the valve cavity, the flow rate between the valve core and the valve body changes due to the change in the inner diameter of the groove, thereby achieving the purpose of regulating the outlet flow rate. Specifically, when the inlet pressure increases, the water pressure overcomes the elastic force of the elastic element, causing the valve core to slide away from the valve seat. As the inner diameter of the groove gradually decreases along the water flow direction, the flow rate between the valve core and the valve body decreases, and the outlet flow rate decreases accordingly. When the inlet pressure decreases, the valve core slides closer to the valve seat under the force of the elastic element. As the inner diameter of the groove gradually decreases along the water flow direction, the flow rate between the valve core and the valve body increases, and the outlet flow rate increases accordingly. In particular, when the inlet pressure decreases to a certain preset value, the valve core abuts against and closes the sealing port on the valve seat. At this time, the flow valve is in the closed state, thereby enabling the flow valve to automatically and dynamically adjust the valve opening or close the flow valve according to the water pressure change at the inlet.

[0007] Preferably, the valve core includes a rod portion and an abutment portion, the abutment portion being used to abut the valve seat, and a valve core base slidably disposed in the valve body is provided in the valve cavity, the valve core base being used to support the valve core, and the rod portion passing through and connected to the valve core base.

[0008] In this design, the valve core base is connected to the valve stem and can slide within the valve cavity. The valve core base supports the valve core, ensuring that the valve core is subjected to uniform force and can slide smoothly within the cavity, thereby improving the reliability of the valve core sliding.

[0009] Preferably, the valve core base is provided with a through water passage, which is used to connect the two cavities of the valve core base.

[0010] In this design, the valve core base is embedded in the valve cavity. The valve core base occupies the space of the valve cavity. By setting a water passage on the valve core base, the valve core base can improve the support effect of the valve core without hindering the water flow in the valve cavity.

[0011] Preferably, a mounting seat fixed to the valve body is provided inside the valve cavity, one end of the elastic element is connected to the rod of the valve core, and the other end of the elastic element is connected to the mounting seat.

[0012] In this design, the two ends of the elastic element are fixed by the stem of the valve core and the mounting seat, improving the fixing effect of the elastic element. The valve body applies a force to the elastic element through the mounting seat, and the elastic element applies a force to the valve core.

[0013] Preferably, the mounting base is provided with a through hole, which is used to connect the two cavities of the mounting base.

[0014] In this design, the mounting base is embedded in the valve cavity, occupying space within the valve cavity. By providing a through hole in the mounting base, the mounting base can improve the effect of fixing the elastic element without obstructing the flow of water through the valve cavity.

[0015] Preferably, the flow valve further includes a first sealing ring, which is sleeved on the periphery of the abutment portion of the valve core, and the outer periphery of the first sealing ring abuts against the inner wall of the valve cavity.

[0016] In this design, since the abutment part is used to abut the valve seat and close the sealing port to achieve the purpose of closing the flow valve, the sealing effect of the valve core can be improved by fitting a first sealing ring on the abutment part, thus preventing leakage at the outlet.

[0017] Preferably, the flow valve further includes a first quick-connect plug, the first quick-connect plug being elastic, the valve body having a first constricting cavity, the water inlet being disposed within the first constricting cavity, and the first quick-connect plug being snapped into the first constricting cavity.

[0018] The flow valve also includes a second quick-connect plug, which is elastic. The valve body has a second constricting cavity, and the outlet is disposed in the second constricting cavity. The second quick-connect plug is snapped into the second constricting cavity.

[0019] In this design, the water inlet is located inside the first constricting cavity, which allows the first quick-connect plug to snap into the first constricting cavity using its own elasticity, preventing it from falling out and improving the fixing effect.

[0020] The outlet is located inside the second constricting cavity, which allows the first quick-connect plug to snap into the second constricting cavity using its own elasticity, preventing it from falling off and improving the fixing effect.

[0021] The first quick-connect plug is used for quick connection between the water inlet and an external pipe, and the second quick-connect plug is used for quick connection between the water outlet and an external pipe. This allows for rapid connection without the need for additional equipment, simplifying operation and tools. Simultaneously, the water inlet and outlet can be connected to different external pipes respectively.

[0022] Preferably, a second sealing ring is embedded in the first receiving cavity, the second sealing ring is disposed near the first quick connector, and the second sealing ring is used to seal with the external connector sleeve;

[0023] The second receiving cavity is fitted with a third sealing ring, which is located near the second quick connector and is used to seal with the external connector tube.

[0024] In this design, when the external connector is inserted into the inlet, the second sealing ring is fitted onto the connector to improve the sealing effect between the valve body and the connector.

[0025] When the external connector is inserted into the outlet, the third sealing ring is fitted onto the connector to improve the sealing effect between the valve body and the connector.

[0026] The number of the second and third sealing rings can be adjusted according to user needs to improve the sealing effect.

[0027] Preferably, the first quick connector includes a cylindrical first plug portion, which is inserted into the first concave cavity. A first elongated groove is provided on the side wall of the first plug portion, and the first elongated groove extends along the axial direction of the first quick connector.

[0028] The second quick connector includes a cylindrical second plug portion, which is inserted into the second concave cavity. A second elongated groove is provided on the side wall of the second plug portion, and the second elongated groove extends along the axial direction of the second quick connector.

[0029] In this solution, by opening a first elongated groove on the first plug part, the cylindrical first plug part can be squeezed and contracted before the first plug part is inserted into the first concave cavity, so that the first quick connector can be inserted into the first concave cavity through the first plug part. After being inserted, the first plug part will also spring back to its original position, thereby making the first quick connector elastic and improving the fixing effect.

[0030] By opening a second elongated groove on the second plug portion, the cylindrical second plug portion can be squeezed and contracted before it is inserted into the second retractable cavity, making it easier for the second quick connector to be inserted into the second retractable cavity. After being inserted, the second plug portion will spring back to its original position, thus making the second quick connector elastic and improving the fixing effect.

[0031] A water system comprising a filter element and a flow valve as described above, the flow valve being installed at the wastewater outlet of the filter element.

[0032] In this design, when there is no pressure or very low pressure at the inlet, the valve core is pushed against the valve seat by the elastic element, closing the sealing port. This prevents backflow of water from the user's sewer into the water purifier, causing water pollution. It also reduces the amount of water flowing slowly away from the filter membrane, allowing the user to obtain a larger flow of purified water immediately upon next water intake. If a significant amount of water flows away from the filter membrane, the water purifier needs to refill the filter before dispensing water normally, resulting in a very low water flow rate for the first few seconds.

[0033] When purified water is first drawn, the booster pump in the system operates, and the pressure at the inlet of the flow valve is relatively high, pushing the valve core to compress the elastic element. At this time, there is a small hole (an inclined groove) between the valve core and the valve body, which determines the wastewater ratio. When the pressure is different, the position of the valve core relative to the groove is different, and the cross-sectional area of ​​this small hole is different, resulting in different wastewater ratios.

[0034] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0035] The positive and progressive effects of this utility model are as follows: the flow valve has a groove inclined in the valve cavity along the axial direction of the valve body, and the inner diameter of the groove gradually decreases along the water flow direction. When the valve core slides in the valve cavity, the flow between the valve core and the valve body will change due to the change in the inner diameter of the groove, thereby achieving the purpose of regulating the outlet flow. Specifically, when the inlet pressure increases, the water pressure overcomes the elastic force of the elastic element, causing the valve core to slide away from the valve seat. As the inner diameter of the groove gradually decreases along the water flow direction, the flow rate between the valve core and the valve body decreases, and the outlet flow rate decreases accordingly. When the inlet pressure decreases, the valve core slides closer to the valve seat under the force of the elastic element. As the inner diameter of the groove gradually decreases along the water flow direction, the flow rate between the valve core and the valve body increases, and the outlet flow rate increases accordingly. In particular, when the inlet pressure decreases to a certain preset value, the valve core abuts against and closes the sealing port on the valve seat. At this time, the flow valve is in the closed state, thereby enabling the flow valve to automatically and dynamically adjust the valve opening or close the flow valve according to the water pressure change at the inlet. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the flow valve structure according to a preferred embodiment of the present invention. Figure 1 .

[0037] Figure 2 This is a schematic diagram of the flow valve structure according to a preferred embodiment of the present invention. Figure 2 .

[0038] Figure 3 for Figure 2 Cross-sectional view along line AA.

[0039] Figure 4 This is a structural schematic diagram of the valve core and valve core base according to a preferred embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram of the mounting base according to a preferred embodiment of the present invention.

[0041] Figure 6 This is a schematic diagram of the water system according to a preferred embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] Valve body 1

[0044] Inlet 101

[0045] Outlet 102

[0046] Valve chamber 11

[0047] Groove 12

[0048] Valve seat 13

[0049] Sealing port 131

[0050] First retractor 14

[0051] Second oral cavity 15

[0052] Valve core 2

[0053] 21 of the pole

[0054] Contact part 22

[0055] Elastic element 3

[0056] Valve core base 4

[0057] Water passage 41

[0058] Mounting base 5

[0059] Through hole 51

[0060] First sealing ring 6

[0061] First quick-connect plug 7

[0062] First connector 71

[0063] First long groove 72

[0064] Second quick connector 8

[0065] Second connector 81

[0066] Second long groove 82

[0067] Second sealing ring 9

[0068] Third sealing ring 10

[0069] 100 in the axial direction

[0070] Water flow direction 200

[0071] Pre-filter 201

[0072] First solenoid valve 202

[0073] Booster Pump 203

[0074] 204 membrane filter element

[0075] Post-filter 205

[0076] TDS sensor 206

[0077] Flow valve 207

[0078] Second solenoid valve 208 Detailed Implementation

[0079] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0080] like Figures 1-5 As shown, this embodiment discloses a flow valve, which includes a valve body 1, a valve core 2, and an elastic element 3. The surface of the valve body 1 has an inlet 101 and an outlet 102. The interior of the valve body 1 has a valve cavity 11. The inner wall of the valve cavity 11 has an inclined groove 12. The groove 12 extends obliquely along the axial direction 100 of the valve body 1. The inner diameter of the groove 12 gradually decreases along the water flow direction 200. The side wall of the valve cavity 11 near the inlet 101 is a valve seat 13. The valve seat 13 is provided with a sealing port 131. The inlet 101 is connected to the outlet 102 through the sealing port 131 and the valve cavity 11. The valve core 2 is slidably disposed in the valve cavity 11 along the axial direction 100 of the valve body 1. The two ends of the elastic element 3 are respectively connected to the valve core 2 and the valve body 1. The elastic element 3 applies a force that causes the valve core 2 to abut against the sealing port 131 of the valve seat 13.

[0081] like Figures 1-5As shown, the flow valve has a groove 12 inclinedly arranged in the valve cavity 11 along the axial direction 100 of the valve body 1, and the inner diameter of the groove 12 gradually decreases along the water flow direction 200. When the valve core 2 slides in the valve cavity 11, the flow between the valve core 2 and the valve body 1 will change due to the change in the inner diameter of the groove 12, so as to achieve the purpose of regulating the flow of the outlet 102. Specifically, when the pressure at the inlet 101 increases, the water pressure overcomes the elastic force of the elastic element 3, causing the valve core 2 to slide away from the valve seat 13. Since the inner diameter of the groove 12 gradually decreases along the water flow direction 200, the flow rate between the valve core 2 and the valve body 1 decreases, and correspondingly, the flow rate at the outlet 102 decreases. When the pressure at the inlet 101 decreases, the valve core 2 slides closer to the valve seat 13 under the force of the elastic element 3. Since the inner diameter of the groove 12 gradually decreases along the water flow direction 200, the flow rate between the valve core 2 and the valve body 1 increases, and correspondingly, the flow rate at the outlet 102 increases. In particular, when the pressure at the inlet 101 decreases to a certain preset value, the valve core 2 abuts against and closes the sealing port 131 on the valve seat 13. At this time, the flow valve is in the closed state, thereby enabling the flow valve to automatically and dynamically adjust the valve opening or close the flow valve according to the water pressure change at the inlet 101.

[0082] like Figure 3 and Figure 4 As shown, the valve core 2 includes a rod portion 21 and an abutment portion 22. The abutment portion 22 abuts against the valve seat 13. A valve core base 4, which slides on the valve body 1, is disposed inside the valve cavity 11. The valve core base 4 supports the valve core 2. The rod portion 21 passes through and is connected to the valve core base 4. The valve core base 4 is connected to the valve rod and can slide within the valve cavity 11. The valve core base 4 supports the valve core 2, ensuring that the valve core 2 is subjected to uniform force and can slide smoothly within the cavity, thereby improving the reliability of the valve core 2's sliding.

[0083] like Figure 4 As shown, a through water passage 41 is provided on the valve core base 4, which connects the two cavities on both sides of the valve core base 4. The valve core base 4 is embedded in the valve cavity 11, occupying the space of the valve cavity 11. By providing the water passage 41 on the valve core base 4, the valve core base 4 can improve the support effect of the valve core 2 without hindering the water flow in the valve cavity 11.

[0084] In an alternative embodiment, the valve core base may be offset within the valve cavity, with a water passage reserved on the other side of the valve core base.

[0085] like Figure 3 and Figure 5As shown, a mounting base 5 fixed to the valve body 1 is provided inside the valve cavity 11. One end of the elastic element 3 is connected to the rod portion 21 of the valve core 2, and the other end of the elastic element 3 is connected to the mounting base 5. The two ends of the elastic element 3 are fixed by the rod portion 21 of the valve core 2 and the mounting base 5, improving the fixing effect of the elastic element 3. The valve body 1 applies a force to the elastic element 3 through the mounting base 5, and the elastic element 3 applies a force to the valve core 2.

[0086] like Figure 5 As shown, the mounting base 5 is provided with a through hole 51, which is used to connect the two cavities of the mounting base 5. The mounting base 5 is embedded in the valve cavity 11 and occupies the space of the valve cavity 11. By providing a through hole 51 on the mounting base 5, the mounting base 5 can improve the effect of fixing the elastic element 3 without hindering the water flow in the valve cavity 11 through the mounting base 5.

[0087] In an alternative embodiment, the mounting base may be biased within the valve cavity, with a water passage remaining on the other side of the valve core base.

[0088] like Figure 3 and Figure 4 As shown, the flow valve also includes a first sealing ring 6, which is sleeved on the periphery of the abutment portion 22 of the valve core 2, with the outer periphery of the first sealing ring 6 abutting against the inner wall of the valve cavity 11. Since the abutment portion 22 is used to abut against the valve seat 13 and close the sealing port 131 to achieve the purpose of closing the flow valve, by sleeved with the first sealing ring 6 on the abutment portion 22, the sealing effect of the valve core 2 can be improved, preventing leakage at the outlet 102.

[0089] like Figure 3 As shown, the flow valve also includes a first quick-connect plug 7, which is elastic. The valve body 1 has a first constricting cavity 14, and the inlet 101 is disposed within the first constricting cavity 14. The first quick-connect plug 7 is snapped into the first constricting cavity 14. By placing the inlet 101 within the first constricting cavity 14, the first quick-connect plug 7 can be easily snapped into the first constricting cavity 14 using its own elasticity, preventing it from falling out and improving the fixing effect. The flow valve also includes a second quick-connect plug 8, which is elastic. The valve body 1 has a second constricting cavity 15, and the outlet 102 is disposed within the second constricting cavity 15. The second quick-connect plug 8 is snapped into the second constricting cavity 15. By placing the outlet 102 within the second constricting cavity 15, the first quick-connect plug 7 can be easily snapped into the second constricting cavity 15 using its own elasticity, preventing it from falling out and improving the fixing effect. The first quick-connect plug 7 is used for quick connection between the inlet 101 and an external pipe, and the second quick-connect plug 8 is used for quick connection between the outlet 102 and an external pipe. This allows for quick connection without the need for other equipment, simplifying operation and tools. Simultaneously, after connection, the inlet 101 and outlet 102 can be connected to different external pipes respectively.

[0090] like Figure 3 As shown, a second sealing ring 9 is embedded within the first constricting cavity 14, located near the first quick-connect plug 7. The second sealing ring 9 is used to seal against the external connector. When the external connector is inserted into the inlet 101, the second sealing ring 9 is fitted onto the connector, improving the sealing effect between the valve body 1 and the connector. A third sealing ring 10 is embedded within the second constricting cavity 15, located near the second quick-connect plug 8. The third sealing ring 10 is used to seal against the external connector. When the external connector is inserted into the outlet 102, the third sealing ring 10 is fitted onto the connector, improving the sealing effect between the valve body 1 and the connector.

[0091] like Figure 3 As shown, in order to improve the sealing effect, there are two of each of the second sealing ring 9 and the third sealing ring 10.

[0092] In other alternative embodiments, the number of the second and third sealing rings can be adjusted according to user needs to improve the sealing effect.

[0093] like Figure 3 As shown, the first quick-connect plug 7 includes a cylindrical first insertion portion 71, which is inserted into a first retractable cavity 14. A first elongated groove 72 is provided on the side wall of the first insertion portion 71, extending along the axial direction 100 of the first quick-connect plug 7. By creating the first elongated groove 72 on the first insertion portion 71, the cylindrical first insertion portion 71 can be compressed and contracted before it is inserted into the first retractable cavity 14, facilitating the insertion of the first quick-connect plug 7 into the first retractable cavity 14. After insertion, the first insertion portion 71 springs back to its original position, thus giving the first quick-connect plug 7 elasticity and improving the fixing effect. Preferably, multiple first elongated grooves 72 are evenly spaced along the circumferential direction of the first insertion portion 71 to improve the elasticity of the first quick-connect plug 7.

[0094] like Figure 3As shown, the second quick-connect plug 8 includes a cylindrical second insertion portion 81, which is inserted into the second concave cavity 15. A second elongated groove 82 is provided on the side wall of the second insertion portion 81, extending along the axial direction 100 of the second quick-connect plug 8. By creating the second elongated groove 82 on the second insertion portion 81, the cylindrical second insertion portion 81 can be compressed and contracted before it is inserted into the second concave cavity 15, facilitating the insertion of the second quick-connect plug 8 into the second concave cavity 15. After insertion, the second insertion portion 81 springs back to its original position, thus giving the second quick-connect plug 8 elasticity and improving the fixing effect. Preferably, multiple second elongated grooves 82 are evenly spaced along the circumferential direction of the second insertion portion 81 to improve the elasticity of the second quick-connect plug 8.

[0095] In this embodiment, the harder material is made elastic by creating grooves in the connector. Of course, in other alternative embodiments, a flexible rubber material can be directly used to make the connector, thus eliminating the need for grooves in the connector.

[0096] This embodiment also discloses a water system including a filter element and a flow valve as described above, with the flow valve installed at the wastewater outlet of the filter element. When there is no pressure at the inlet 101, or the pressure is very low, the valve core 2 is pushed against the valve seat 13 by the elastic element 3, closing the sealing port 131. This prevents backflow of water from the user's sewer into the water purifier, causing water pollution, and also reduces the slow flow of water from the wastewater outlet before the filter membrane, so that the user can immediately obtain a larger flow of purified water the next time they take water. If a large amount of water flows away before the filter membrane, the water purifier needs to fill the filter element with water before it can dispense water normally when the user takes water again, resulting in a very low purified water flow for the first few seconds and a poor user experience.

[0097] When purified water is drawn, the booster pump in the system operates, and the pressure at the inlet 101 of the flow valve is relatively high, pushing the valve core 2 to compress the elastic element 3. At this time, there is a small hole (inclined groove 12) between the valve core 2 and the valve body 1, which plays a role in the wastewater ratio. When the pressure is different, the position of the valve core 2 relative to the groove 12 is different, and the cross-sectional area of ​​this small hole is different, resulting in different wastewater ratios.

[0098] like Figure 6As shown, the water system includes a membrane filter element 204, a booster pump 203, and an adjustable wastewater ratio flow valve 207. It may also include a pre-filter element 201, a post-filter element 205, a first solenoid valve 202, a second solenoid valve 208, and a TDS sensor 206. The first solenoid valve 202 is located in the inlet passage before the membrane filter element 204, specifically before or after the pre-filter element 201. The TDS sensor 206 is located in the purified water passage, either between the membrane filter element 204 and the post-filter element 205, or between the post-filter element 205 and the outlet. The adjustable wastewater ratio flow valve 207 is installed at the wastewater outlet of the membrane filter element 204. The second solenoid valve 208 is connected in parallel with the adjustable wastewater ratio flow valve 207. During flushing, the second solenoid valve 208 is opened to flush, extending the service life of the membrane filter element 204.

[0099] When the TDS value of the purified water detected by the controller via the TDS sensor is lower than the set value (if the product has multiple settings, the user can choose according to actual needs), the TDS value of the purified water needs to be increased. Considering the characteristics of the membrane filter element, this means reducing the membrane filter element's rejection rate. At this time, the output of the booster pump should be increased to raise the pressure before the membrane filter element and the adjustable wastewater ratio flow valve. When the pressure increases, the membrane rejection rate decreases. Simultaneously, when the pressure before the adjustable wastewater ratio flow valve increases, it pushes the valve core towards the wastewater ratio outlet side, making the wastewater ratio even smaller, which further improves the recovery rate and further reduces the membrane rejection rate. This dual action more effectively regulates the TDS value of the purified water.

[0100] Conversely, when the detected TDS value of the purified water is greater than the set value or the user-selected value, the output of the booster pump is reduced, thereby lowering the pressure before the membrane filter and the flow valve for the adjustable wastewater ratio. This improves the membrane's retention rate.

[0101] The above solutions are applicable to membranes where the inlet pressure increases and the rejection rate decreases, or where the inlet pressure decreases and the rejection rate increases.

[0102] The direction of water flow in the system is as follows Figure 6 The arrow in the middle indicates the waterway.

[0103] In the description herein, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "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 this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0104] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A flow valve characterized by, The flow valve comprises a valve body, a valve core and an elastic element, a surface of the valve body is provided with a water inlet and a water outlet, an inner part of the valve body is provided with a valve cavity, an inner wall of the valve cavity is provided with a groove which is obliquely arranged, the groove extends obliquely along an axial direction of the valve body, an inner diameter of the groove gradually decreases along a water flow direction, a side wall of the valve cavity close to the water inlet is a valve seat, the valve seat is provided with a sealing opening, the water inlet is communicated with the water outlet through the sealing opening and the valve cavity, the valve core is slidably arranged in the valve cavity along the axial direction of the valve body, two ends of the elastic element are connected to the valve core and the valve body respectively, and the elastic element applies an action force to make the valve core abut against the sealing opening of the valve seat.

2. The flow valve of claim 1, wherein, The valve core comprises a rod part and an abutting part, the abutting part is used for abutting against the valve seat, a valve core base which is slidably arranged in the valve body is arranged in the valve cavity, the valve core base is used for supporting the valve core, and the rod part penetrates through and is connected to the valve core base.

3. The flow valve of claim 2, wherein, A through water passage is arranged on the valve core base, and the through water passage is used for communicating two side cavities of the valve core base.

4. The flow valve of claim 1, wherein, An installation base which is fixed to the valve body is arranged in the valve cavity, one end of the elastic element is connected to the rod part of the valve core, and the other end of the elastic element is connected to the installation base.

5. The flow valve of claim 4, wherein, A through hole is arranged on the installation base, and the through hole is used for communicating two side cavities of the installation base.

6. The flow valve of claim 1, wherein, The flow valve further comprises a first sealing ring, the first sealing ring is sleeved on a circumferential side of the abutting part of the valve core, and an outer circumferential side of the first sealing ring abuts against an inner wall of the valve cavity.

7. The flow valve of claim 1, wherein, The flow valve further comprises a first quick plug, the first quick plug has elasticity, the valve body is provided with a first converging cavity, the water inlet is arranged in the first converging cavity, and the first quick plug is clamped in the first converging cavity. The flow valve further comprises a second quick plug, the second quick plug has elasticity, the valve body is provided with a second converging cavity, the water outlet is arranged in the second converging cavity, and the second quick plug is clamped in the second converging cavity.

8. The flow valve of claim 7, wherein, A second sealing ring is embedded in the first converging cavity, the second sealing ring is arranged close to the first quick plug, and the second sealing ring is used for sleeving and sealing with an external plug pipe; A third sealing ring is embedded in the second converging cavity, the third sealing ring is arranged close to the second quick plug, and the third sealing ring is used for sleeving and sealing with an external plug pipe.

9. The flow valve of claim 7, wherein, The first quick plug comprises a cylindrical first plug part, the first plug part is inserted in the first converging cavity, a first long slot is arranged on a side wall of the first plug part, and the first long slot extends along an axial direction of the first quick plug. The second quick plug comprises a cylindrical second plug part, the second plug part is inserted in the second converging cavity, a second long slot is arranged on a side wall of the second plug part, and the second long slot extends along an axial direction of the second quick plug.

10. A waterway system characterized by, The waterway system comprises a filter element and the flow valve according to any one of claims 1-9, and the flow valve is installed at a waste water outlet of the filter element.

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