A post-filter element and a waterway system of a water purifier thereof

Abstract

The utility model discloses a rear filter element and waterway system of water purifier thereof, its inside has filter layer and be separated by this filter layer and enter water cavity and temporary storage cavity, be equipped with air bag in temporary storage cavity, change the volume of air bag through, thereby change the volume of temporary storage cavity, to make the pure water amount in temporary storage cavity increase or the pure water in temporary storage cavity is discharged from the water outlet of rear filter element. The utility model solves the problem that the first cup water TDS value is high thoroughly, makes the TDS value of first cup water and pure water keep consistent, and the appearance, the volume of water purifier itself remain unchanged.

Description

Technical Field

[0001] This utility model relates to the technical field of water purifiers, and in particular to a post-filter cartridge and the water circuit system of the water purifier. Background Technology

[0002] Reverse osmosis water purifiers use a booster pump to pressurize the water before the reverse osmosis membrane, allowing pure water to flow from the high-concentration side to the low-concentration side. However, when the purifier stops working, the pressure applied before the reverse osmosis membrane disappears. Since there is concentrated water before the membrane and pure water after the membrane, an osmotic pressure difference appears on both sides, resulting in bidirectional osmosis. That is, pure water permeates to the concentrated water side, and concentrated water permeates to the pure water side. As the bidirectional osmosis time increases, the concentration of pure water inside the membrane gradually increases. The longer the shutdown time, the higher the TDS value of the pure water inside the membrane, making the TDS value of the first cup of water after the purifier is turned on higher than, or even higher than, the TDS value of the raw water.

[0003] Current technology typically involves adding a reflux solenoid valve after the RO membrane. After water production is complete, a timed pure water reflux program is activated, leading the filtered pure water to the membrane for rinsing. This allows the concentrated water previously at the membrane's inlet to be discharged from the wastewater outlet. This ensures that the concentration of the water remaining before the membrane is not too high after neutralization with pure water, reducing the osmotic pressure difference between the two sides. When the next batch of water is discharged, the TDS value of the first batch will be significantly lower. However, this method only reduces the TDS value of the first batch to about 30% of its pre-treatment level, still far exceeding the TDS value of pure water. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a post-filter cartridge and its water circuit system for a water purifier, so as to completely solve the problem of high TDS value of the first cup of water, so that the TDS value of the first cup of water is consistent with that of pure water, while the appearance and volume of the water purifier itself remain unchanged.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A post-filter cartridge has a filter layer inside, and an inlet chamber and a storage chamber separated by the filter layer. The storage chamber is provided with an air bladder. By changing the volume of the air bladder, the volume of the storage chamber is changed, so as to increase the amount of pure water in the storage chamber or discharge the pure water in the storage chamber from the outlet of the post-filter cartridge.

[0007] The aforementioned post-filter cartridge is provided with a one-way valve at its water inlet end.

[0008] The aforementioned post-filter element includes: a cylindrical body and a storage cylinder, the filter layer is disposed in the cylindrical body, the cylindrical body is provided with the water inlet chamber and the first temporary storage chamber, the storage cylinder is provided with the second temporary storage chamber and the air bladder, and the first temporary storage chamber and the second temporary storage chamber form the temporary storage chamber.

[0009] In the aforementioned post-filter element, the side wall of the air bladder is sealed to the inner wall of the storage cylinder. The storage cylinder is provided with an inflation nozzle that communicates with the air bladder. An air valve cap is detachably installed on the inflation nozzle. By changing the volume of the air bladder, the volume of the second temporary storage chamber is changed, thereby changing the volume of the temporary storage chamber.

[0010] In the aforementioned post-filter element, a pressure ring is provided between the side wall of the air bladder and the inner wall of the storage cylinder to ensure a sealed connection between the side wall of the air bladder and the inner wall of the storage cylinder.

[0011] In the aforementioned post-filter cartridge, the two ends of the cylindrical body are respectively provided with end caps, the filter layer is a carbon rod, the two ends of the carbon rod are respectively connected to the two end caps, the water inlet cavity is formed between the inner wall of the cylindrical body and the outer wall of the carbon rod, and the first temporary storage cavity is formed inside the carbon rod.

[0012] The aforementioned post-filter element has a post-filter element inlet and a post-filter element outlet at one end, and a connecting port at the other end, which connects the first temporary storage chamber and the second temporary storage chamber.

[0013] A water system for a water purifier includes the aforementioned post-filter cartridge and a reverse osmosis membrane cartridge. The pure water inlet of the reverse osmosis membrane cartridge is connected to a drain pipe and a return pipe, respectively. The drain pipe is connected to the inlet of the post-filter cartridge, and the return pipe is connected to the inlet of the reverse osmosis membrane cartridge.

[0014] The water system of the water purifier described above further includes: a control system and a flow meter, wherein the flow meter is located at the outlet of the post-filter cartridge;

[0015] When the outlet of the water system is opened, water continuously flows out of the outlet of the post-filter cartridge. The flow meter detects the water flow and feeds the signal back to the control system. The control system controls the opening and closing of the discharge pipe and the return pipe.

[0016] A high-pressure switch is installed on the water discharge pipeline.

[0017] In the water system of the water purifier described above, both the drain pipe and the return pipe are equipped with the one-way valve, and the one-way valve on the drain pipe is located at the inlet end of the post-filter cartridge;

[0018] Both the drain pipe and the return pipe are equipped with solenoid valves.

[0019] The water system of the water purifier also includes: a water pump and a composite filter element, wherein the outlet of the water pump is connected to the inlet of the reverse osmosis membrane filter element, the return pipeline is connected to the inlet of the water pump, and the outlet of the composite filter element is connected to the inlet of the water pump.

[0020] The solenoid valve is also provided between the composite filter element and the water pump;

[0021] The water system of the water purifier also includes a flushing pipe, which is connected to the concentrate outlet of the reverse osmosis membrane filter element, and the flushing pipe is also equipped with the one-way valve and the solenoid valve.

[0022] Because this utility model employs the aforementioned technology, it has the following positive effects compared to existing technologies:

[0023] (1) This utility model is equipped with a post-filter. The first cup of water after the water purifier is turned on flows out from the temporary storage chamber of the post-filter, ensuring that the TDS value of the pure water meets the standard, completely solving the problem of the TDS value of the first cup of water being too high, so that the TDS value of the first cup of water is consistent with that of pure water, while the appearance and volume of the water purifier itself remain unchanged.

[0024] (2) In this utility model, the post-filter is installed at the rear end of the reverse osmosis membrane filter. While the first cup of water flows out of the temporary storage chamber of the post-filter, the reverse osmosis membrane filter enters the circulating water production mode. When the TDS value of the pure water at the rear end of the reverse osmosis membrane filter meets the standard, the pure water at the rear end of the reverse osmosis membrane filter enters the post-filter and enters the normal water production mode, which can continuously provide pure water that meets the TDS value standard to the outlet of the post-filter. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the post-filter element in this utility model.

[0026] Figure 2 This is a schematic diagram of the water circuit system of the water purifier in this utility model.

[0027] In the attached diagram: 1. Post-filter cartridge; 2. Check valve; 3. Reverse osmosis membrane cartridge; 4. Flow meter; 5. High-pressure switch; 6. Solenoid valve; 7. Water pump; 8. Composite filter cartridge; 9. Flushing pipeline; 11. Filter layer; 12. Inlet chamber; 13. Temporary storage chamber; 14. Air bladder; 15. Cylinder; 16. Storage cylinder; 17. First temporary storage chamber; 18. Second temporary storage chamber; 19. Air inlet; 20. Valve cap; 21. Pressure ring; 22. End cap; 23. Post-filter cartridge inlet; 24. Post-filter cartridge outlet; 25. Connecting port; 26. Sealing ring; 31. Drain pipeline; 32. Return pipeline. Detailed Implementation

[0028] The technical solution of this utility model 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 this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0031] It should be noted that, unless otherwise specified, this utility model can be used at the angle shown in the accompanying drawings or at other angles.

[0032] Please see Figures 1 to 2 As shown, a preferred embodiment of the post-filter cartridge 1 is illustrated. It has a filter layer 11 inside, and an inlet chamber 12 and a temporary storage chamber 13 separated by the filter layer 11. An air bladder 14 is provided in the temporary storage chamber 13. By changing the volume of the air bladder 14, the volume of the temporary storage chamber 13 is changed, so that the amount of pure water in the temporary storage chamber 13 increases or the pure water in the temporary storage chamber 13 is discharged from the outlet of the post-filter cartridge 1.

[0033] Furthermore, as a preferred embodiment, the inlet end of the post-filter 1 is provided with a one-way valve 2.

[0034] Furthermore, increasing the volume of the airbag 14 reduces the volume of the temporary storage chamber 13. Since a one-way valve 2 is provided at the water inlet of the post-filter 1, the pure water in the temporary storage chamber 13 is discharged from the water outlet of the post-filter 1, ensuring that the TDS value of the pure water meets the standard, completely solving the problem of the high TDS value of the first cup of water, so that the TDS value of the first cup of water is consistent with that of pure water, while the appearance and volume of the water purifier itself remain unchanged.

[0035] Pure water is injected into the temporary storage chamber 13 to increase its volume and reduce the volume of the air bladder 14, so as to store more pure water.

[0036] Furthermore, as a preferred embodiment, the post-filter 1 includes: a cylinder 15 and a storage cylinder 16, a filter layer 11 is disposed in the cylinder, the cylinder 11 is provided with a water inlet chamber 12 and a first temporary storage chamber 17, the storage cylinder 16 is provided with a second temporary storage chamber 18 and an air bladder 14, and the first temporary storage chamber 17 and the second temporary storage chamber 18 form a temporary storage chamber 13.

[0037] Furthermore, as a preferred embodiment, the side wall of the airbag 14 is sealed to the inner wall of the storage cylinder 16. The storage cylinder 16 is provided with an inflation nozzle 19 that communicates with the airbag 14. A valve cap 20 is detachably installed on the inflation nozzle 19. By changing the volume of the airbag 14, the volume of the second temporary storage chamber 18 is changed, thereby changing the volume of the temporary storage chamber 13.

[0038] Preferably, the air inlet 19 is connected to an air source (not shown in the figure), and the air source is controlled by a control system.

[0039] Furthermore, as a preferred embodiment, a pressure ring 21 is provided between the side wall of the airbag 14 and the inner wall of the storage cylinder 16 to ensure a sealed connection between the side wall of the airbag 14 and the inner wall of the storage cylinder 16.

[0040] Furthermore, in a preferred embodiment, the cylinder 15 is provided with end caps 22 at both ends, the filter layer 11 is a carbon rod, the two ends of the carbon rod are respectively connected to the two end caps 22, a water inlet cavity 12 is formed between the inner wall of the cylinder 15 and the outer wall of the carbon rod, and a first temporary storage cavity 17 is formed inside the carbon rod.

[0041] Furthermore, as a preferred embodiment, one end of the post-filter element 1 is provided with a post-filter element inlet 23 and a post-filter element outlet 24, and the other end of the post-filter element 1 is provided with a connecting port 25, which connects the first temporary storage chamber 17 and the second temporary storage chamber 18.

[0042] Preferably, the inlet 23, outlet 24, and connecting port 25 of the post-filter cartridge are sealed with sealing rings 26 for sealing. Sealing rings 26 can also be installed at both ends of the carbon rod for sealing to prevent water leakage or cross-contamination.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model.

[0044] Based on the above, this utility model also has the following embodiments:

[0045] In a further embodiment of this utility model, a water circuit system for a water purifier is shown, including the aforementioned post-filter 1, and further including: a reverse osmosis membrane filter 3, wherein the pure water outlet of the reverse osmosis membrane filter 3 is respectively connected to a water outlet pipe 31 and a return pipe 32, the water outlet pipe 31 is connected to the water inlet of the post-filter 1, and the return pipe 32 is connected to the water inlet of the reverse osmosis membrane filter 3.

[0046] In a further embodiment of this utility model, the water system of the water purifier further includes: a control system (not shown in the figure) and a flow meter 4, wherein the flow meter 4 is located at the outlet of the post-filter 1.

[0047] When the outlet of the water system is opened, water continuously flows out of the outlet of the post-filter 1. The flow meter 4 detects the water flow and feeds the signal back to the control system. The control system controls the opening and closing of the water discharge pipe 31 and the return pipe 32.

[0048] In a further embodiment of this utility model, a high-pressure switch 5 is provided on the water discharge pipe 31.

[0049] In a further embodiment of this utility model, a one-way valve 2 is provided on both the drain pipe 31 and the return pipe 32, and the one-way valve 2 on the drain pipe 31 is located at the water inlet end of the post-filter element 1.

[0050] In a further embodiment of this utility model, both the drain pipe 31 and the return pipe 32 are equipped with solenoid valves 6.

[0051] In a further embodiment of this utility model, the water system of the water purifier further includes: a water pump 7 and a composite filter element 8, the outlet of the water pump 7 is connected to the inlet of the reverse osmosis membrane filter element 3, the return pipe 32 is connected to the inlet of the water pump 7, and the outlet of the composite filter element 8 is connected to the inlet of the water pump 7.

[0052] In a further embodiment of this utility model, a solenoid valve 6 is also provided between the composite filter element 8 and the water pump 7.

[0053] In a further embodiment of this utility model, the water system of the water purifier further includes: a flushing pipe 9, which is connected to the concentrate outlet of the reverse osmosis membrane filter element 3, and the flushing pipe 9 is also equipped with a one-way valve 2 and a solenoid valve 6.

[0054] Circulating water production mode: Close the water outlet pipe 31 and open the return pipe 32 to allow the water in the outlet chamber of the reverse osmosis membrane filter element 3 to flow back to the inlet of the reverse osmosis membrane filter element 3 until the TDS value of the water in the outlet chamber of the reverse osmosis membrane filter element 3 meets the standard.

[0055] Normal water production mode: Open the water outlet pipe 31 and close the return pipe 32, and the water in the outlet chamber of the reverse osmosis membrane filter element 3 enters the post-filter element 1.

[0056] The time required for the circulating water production mode is the first set time.

[0057] After the reverse osmosis membrane filter element 3 has been circulating water for the first set time, the TDS value of the water in the outlet chamber of the reverse osmosis membrane filter element 3 meets the standard.

[0058] Normal operation mode of the water system: The airbag 14 compresses the volume of the storage chamber 13, causing the pure water in the storage chamber 13 to flow out and pass through the flow meter 4. The flow meter 4 sends a signal to the control system, which controls the water discharge pipe 31 to close and the return pipe 32 to open. Tap water enters the reverse osmosis membrane filter element 3. The pure water with a high TDS value at the back end of the reverse osmosis membrane filter element 3 flows out from the pure water port of the reverse osmosis membrane filter element 3 and returns to the front end of the reverse osmosis membrane filter element 3 through the return pipe 32 for circulating water production, so that the TDS value of the pure water at the back end of the reverse osmosis membrane filter element 3 meets the standard. When the circulating water production mode reaches the first set time, the control system controls the water discharge pipe 31 to open and the return pipe 32 to close. The pure water that meets the TDS value passes through the water discharge pipe 31 and the post-filter element 1 and continuously flows out from the outlet of the post-filter element 1.

[0059] Normal shutdown mode of the water system: After the outlet of the post-filter 1 is open for more than the first set time, it closes, the flow meter 4 stops working, and the high-pressure switch 5 sends a signal to the control system. If the high-pressure switch 5 is in the closed state at this time, the water system operates in normal water production mode, replenishing the temporary storage chamber 13 of the post-filter 1 with pure water. When the water storage chamber 13 of the post-filter 1 is sufficient and the pressure reaches the high-pressure switch 5 disconnection threshold, the high-pressure switch 5 disconnects, the entire circuit loses power, and the water system stops producing water. If the high-pressure switch 5 is in the open state at this time, the entire circuit loses power, and the water system stops producing water.

[0060] Intermittent shutdown mode of the water system: If the outlet of the post-filter 1 is open for less than the first set time, the water system continues to perform the circulating water production mode until the first set time is reached. Then, the high-pressure switch 5 signals the control system. If the high-pressure switch 5 is in the open state at this time, the entire circuit loses power and the water system stops producing water. If the high-pressure switch 5 is in the closed state, the water system performs the normal water production mode, replenishing the temporary storage chamber 13 of the post-filter 1 with pure water. When the water storage chamber 13 of the post-filter 1 is sufficient and the pressure reaches the high-pressure switch 5 disconnection threshold, the high-pressure switch 5 disconnects, the entire circuit loses power, and the water system stops producing water.

[0061] Intermittent opening mode of the water system: When the outlet of the post-filter 1 opens after the interval between the last closing time and the last closing time exceeds the second set time, the normal opening mode of the water system is executed; when the interval between the last closing time and the last closing time of the post-filter 1 is greater than the first set time but less than the second set time, the normal water production mode is executed; when the interval between the last closing time and the last closing time of the post-filter 1 is less than the first set time, if the circulation water production mode has not reached the first set time, the circulation water production mode continues until the first set time is reached, and then the normal water production mode is executed; if the circulation water production mode has reached the first set time, the normal water production mode is executed.

[0062] The second set time is greater than the first set time.

[0063] The first set time is 5 seconds or more, preferably 15 seconds; the second set time is 5 minutes or more, preferably 10 minutes.

[0064] The one-way valve 2 on the drain pipe 31 restricts the water flow from the post-filter cartridge 1 to the reverse osmosis membrane cartridge 3, and the one-way valve 2 on the return pipe 32 restricts the water inlet of the water system from flowing from the return pipe 32 to the pure water outlet of the reverse osmosis membrane cartridge 3.

[0065] Since both the drain pipe 31 and the return pipe 32 are equipped with solenoid valves 6, when the outlet of the water system is opened, the control airbag 14 compresses the volume of the temporary storage chamber 13, so that the outlet of the water system continues to discharge water. At the same time, the solenoid valve 6 on the drain pipe 31 is closed and the solenoid valve 6 on the return pipe 32 is opened, so that the water in the outlet chamber of the reverse osmosis membrane filter element 3 flows back to the inlet of the reverse osmosis membrane filter element 3 until the TDS value of the water in the outlet chamber of the reverse osmosis membrane filter element 3 meets the standard. Then, the solenoid valve 6 on the drain pipe 31 is opened and the solenoid valve 6 on the return pipe 32 is closed, so that the water in the outlet chamber of the reverse osmosis membrane filter element 3 enters the post-filter element 1.

[0066] Preferably, a solenoid valve 6, a check valve 2, and a high-pressure switch 5 are sequentially provided on the water discharge pipe 31 along the direction from the reverse osmosis membrane filter element 3 to the post-filter element 1; a solenoid valve 6 and a check valve 2 are sequentially provided on the return pipe 32 along the direction from the pure water outlet of the reverse osmosis membrane filter element 3 to the water inlet of the reverse osmosis membrane filter element 3.

[0067] This invention installs the post-filter 1 at the rear end of the reverse osmosis membrane filter 3. While the first cup of water flows out of the temporary storage chamber 13 of the post-filter 1, the reverse osmosis membrane filter 3 enters the circulating water production mode. When the TDS value of the pure water at the rear end of the reverse osmosis membrane filter 3 meets the standard, the pure water at the rear end of the reverse osmosis membrane filter 3 enters the post-filter 1 to enter the normal water production mode, and can continuously provide pure water that meets the TDS value standard to the outlet of the post-filter 1.

[0068] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A post-filter element, characterized in that, It has a filter layer inside, and an inlet chamber and a storage chamber separated by the filter layer. The storage chamber is equipped with an air bladder. By changing the volume of the air bladder, the volume of the storage chamber is changed, so as to increase the amount of pure water in the storage chamber or discharge the pure water in the storage chamber from the outlet of the post-filter.

2. The post-filter element according to claim 1, characterized in that, The inlet end of the post-filter is equipped with a one-way valve.

3. The post-filter element according to claim 2, characterized in that, include: The cylinder and the storage cylinder are provided. The filter layer is disposed in the cylinder. The cylinder is provided with the water inlet chamber and the first temporary storage chamber. The storage cylinder is provided with the second temporary storage chamber and the air bag. The first temporary storage chamber and the second temporary storage chamber form the temporary storage chamber.

4. The post-filter element according to claim 3, characterized in that, The side wall of the airbag is sealed to the inner wall of the storage cylinder. The storage cylinder is provided with an inflation nozzle that communicates with the airbag. A valve cap is detachably installed on the inflation nozzle. By changing the volume of the airbag, the volume of the second temporary storage chamber is changed, thereby changing the volume of the temporary storage chamber.

5. The post-filter element according to claim 4, characterized in that, A pressure ring is provided between the side wall of the airbag and the inner wall of the storage cylinder to ensure a sealed connection between the side wall of the airbag and the inner wall of the storage cylinder.

6. The post-filter element according to claim 5, characterized in that, The cylinder is provided with end caps at both ends. The filter layer is a carbon rod. The two ends of the carbon rod are connected to the two end caps respectively. The water inlet cavity is formed between the inner wall of the cylinder and the outer wall of the carbon rod. The first temporary storage cavity is formed inside the carbon rod.

7. The post-filter element according to claim 3, characterized in that, One end of the post-filter element is provided with a post-filter element inlet and a post-filter element outlet, and the other end of the post-filter element is provided with a connecting port, which connects the first temporary storage chamber and the second temporary storage chamber.

8. A water circuit system for a water purifier, characterized in that, The device includes the post-filter cartridge according to any one of claims 1-7, and further includes: a reverse osmosis membrane filter cartridge, wherein the pure water port of the reverse osmosis membrane filter cartridge is respectively connected to a drain pipe and a return pipe, the drain pipe is connected to the inlet of the post-filter cartridge, and the return pipe is connected to the inlet of the reverse osmosis membrane filter cartridge.

9. The water circuit system of the water purifier according to claim 8, characterized in that, Also includes: A control system and a flow meter, wherein the flow meter is located at the outlet of the post-filter element; When the outlet of the water system is opened, water continuously flows out of the outlet of the post-filter cartridge. The flow meter detects the water flow and feeds the signal back to the control system. The control system controls the opening and closing of the discharge pipe and the return pipe. A high-pressure switch is installed on the water discharge pipeline.

10. The water circuit system of the water purifier according to claim 8, characterized in that, Both the drain pipe and the return pipe are equipped with the one-way valve, and the one-way valve on the drain pipe is located at the water inlet end of the post-filter element; Both the drain pipe and the return pipe are equipped with solenoid valves; The water system of the water purifier also includes: a water pump and a composite filter element, wherein the outlet of the water pump is connected to the inlet of the reverse osmosis membrane filter element, the return pipeline is connected to the inlet of the water pump, and the outlet of the composite filter element is connected to the inlet of the water pump. The solenoid valve is also provided between the composite filter element and the water pump; The water system of the water purifier also includes a flushing pipe, which is connected to the concentrate outlet of the reverse osmosis membrane filter element, and the flushing pipe is also equipped with the one-way valve and the solenoid valve.

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