A water purifier waterway system with high water yield and a water purifier containing the water purifier waterway system

Abstract

The utility model provides a kind of high water yield's purifier waterway system, the waterway system includes raw water inlet system (8), water treatment system and purifying water outlet system (7), the system includes sequentially connected water inlet booster pump (1), first water inlet solenoid valve (2), first membrane filter element (4) and second membrane filter element (5), the water outlet end of water inlet booster pump (1) is also connected to the water inlet end of second membrane filter element (5) by branch, the purifying water end of first membrane filter element (4) and the purifying water end of second membrane filter element (5) are connected to purifying water outlet system (8) by pipeline confluence, the purifying water end of first membrane filter element (4) and the purifying water end of second membrane filter element (5) are also connected to the water inlet end of water inlet booster pump (1) by backflow branch after pipeline confluence.The purifier waterway system of the utility model can further improve the water yield of purifier, effectively prolong the life of membrane.

Description

Technical Field

[0001] This utility model relates to a water purifier water circuit system, and particularly to a water purifier water circuit system with a high water production rate, as well as a water purifier containing the water purifier water circuit system. Background Technology

[0002] In mainstream RO water purifier systems, scale inhibitors or softeners are typically added to slow down scaling on the membrane surface and valves, thereby improving the permeate recovery rate (usually to 60-70%). To further improve the permeate recovery rate, current dual-membrane systems mostly use series or parallel membrane configurations. However, simple parallel membrane configurations offer only a small improvement in recovery rate (usually ≤70%), while series configurations are prone to causing fouling of downstream membranes and valves, making long-term stable operation impossible.

[0003] Therefore, improving the structure or configuration of the water system to further enhance the water recovery rate has always been a concern in this field. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the existing technology and provide a new water purifier water circuit system. It is expected to further improve the system water production rate to ≥80%, solve the problem of pressure drop of the second-stage membrane caused by the conventional series mode, ensure the flux of the second-stage membrane, and also balance the membrane load through the dual-membrane series-parallel mode, delay membrane scaling, clogging or fouling, and extend membrane life.

[0005] Based on this, the present invention provides a water circuit system for a water purifier with a high water production rate. The water circuit system includes a raw water inlet system 8, a water treatment system, and a purified water outlet system 7. The water treatment system includes an inlet booster pump 1, a first inlet solenoid valve 2, a first membrane filter 4, and a second membrane filter 5 connected in series. The concentrated water end of the first membrane filter 4 is connected to the inlet end of the second membrane filter 5. The outlet end of the inlet booster pump 1 is also connected to the inlet end of the second membrane filter 5 via a branch line through the second inlet solenoid valve 3. The purified water end of the first membrane filter 4 and the purified water end of the second membrane filter 5 are connected to the purified water outlet system 7 after merging through a pipeline. The purified water end of the first membrane filter 4 and the purified water end of the second membrane filter 5 are also connected to the inlet end of the inlet booster pump 1 via a return branch line after merging through a pipeline. A return solenoid valve 9 is provided on the return branch line.

[0006] In this invention, both the first membrane filter element 4 and the second membrane filter element 5 have an inlet end, a concentrate end, and an inlet end. Connecting the membrane filter elements in series means connecting the concentrate end of the first membrane filter element to the inlet end of the second membrane filter element via a pipeline, so that the concentrate from the first membrane filter element serves as the raw water (or a portion of the raw water) for the second membrane filter element.

[0007] In this invention, the first membrane filter element 4 and the second membrane filter element 5 may be the same or different. For example, the first membrane filter element 4 may be a reverse osmosis membrane filter element, and the second membrane filter element 5 may be a nanofiltration membrane filter element.

[0008] According to a preferred embodiment, after the purified water end of the first membrane filter 4 and the purified water end of the second membrane filter 5 are merged through a pipeline, a post-filter 11 and a purified water TDS probe 12 are installed on the pipeline.

[0009] The purified water outlet system 7 is the system in the water purifier used to output purified water. It usually includes a purified water pipeline check valve 71, a purified water flow meter 72, a high-pressure switch 73, a purified water outlet solenoid valve 74, and a purified water faucet 75 installed on the pipeline. These devices can be connected in series in sequence, and the connection order can be changed appropriately if necessary. In addition, the downstream of the high-pressure switch 73 is also connected to the pipeline machine 76 through a branch line.

[0010] The raw water inlet system 8 is a pretreatment system in the water purifier used to input tap water into the membrane filter (or the booster pump upstream of the membrane filter). It typically includes a raw water three-way valve 81, a pre-filter 82, a raw water solenoid valve 83, and a raw water TDS probe 84, which are sequentially arranged between the tap water outlet and the inlet booster pump 1. The outlet of the pre-filter 82 is also connected to the domestic water tap 85 through a branch.

[0011] Preferably, one-way valves are respectively installed downstream of the second inlet solenoid valve 3, between the concentrate end of the first membrane filter element 4 and the inlet end of the second membrane filter element 5, between the clean water end of the first membrane filter element 4 and the inlet end of the post-filter element 11, between the clean water end of the second membrane filter element 5 and the inlet end of the post-filter element 11, and between the return solenoid valve 9 and the inlet booster pump 1.

[0012] In this invention, the positional relationship between components is explained using the terms "upstream" and "downstream" according to the direction of water flow in the pipeline or system.

[0013] In addition, preferably, a wastewater solenoid valve 6 is provided downstream of the concentrate end of the second membrane filter element 5.

[0014] As another optional implementation, the water purifier water circuit system of this utility model further includes a proportional regulating valve 14, which has a first inlet end, a second inlet end and an outlet end. The first inlet end and the second inlet end are respectively connected to the outlet end of the second inlet solenoid valve 3 and the concentrate end of the first membrane filter element 4. The outlet end of the proportional regulating valve 14 is connected to the inlet end of the second membrane filter element 5.

[0015] Proportional regulating valves are typically two-way regulating valves controlled by a stepper motor. They are used to adjust the cross-sectional areas of the two inlet terminals and are commercially available components. During the water production stage, the desired mixing ratio can be achieved by controlling the cross-sectional areas of the first and second inlet terminals. Similarly, during the flushing stage, the flushing flow rate of a specific pipeline can be ensured by controlling the cross-sectional areas of the two inlet terminals. Figure 3 As shown.

[0016] Based on this, the present invention also provides a water purifier containing the above-mentioned water purifier water circuit system. Attached Figure Description

[0017] Figure 1 This is a diagram of the water system of this utility model; Figure 2 This is a water system diagram for comparison. Figure 3 Diagram of a water system with a proportional control valve; The system includes: 1. Inlet booster pump; 2. First inlet solenoid valve; 3. Second inlet solenoid valve; 4. First membrane filter element; 5. Second membrane filter element; 6. Wastewater solenoid valve; 7. Purified water outlet system; 8. Raw water inlet system; 9. Return solenoid valve; 10. Return pipeline check valve; 11. Post-filter element; 12. Purified water TDS probe; 13. Check valve; 14. Proportional regulating valve. 71. One-way valve for water purification pipeline; 72. Water purification flow meter; 73. High-pressure switch; 74. Solenoid valve for water purification outlet; 75. Water purification faucet; 76. Water dispenser; 81. Raw water three-way valve; 82. Pre-filter; 83. Raw water solenoid valve; 84. Raw water TDS probe; 85. Domestic water faucet. Detailed Implementation

[0018] The following embodiments are used to explain the technical solution of this utility model in a non-limiting manner.

[0019] Example 1 Water purifiers, their water circuit systems are as follows Figure 1 As shown, the system includes a raw water inlet system 8, a water treatment system, and a purified water outlet system 7. The water treatment system includes an inlet booster pump 1, a first inlet solenoid valve 2, a first membrane filter 4, and a second membrane filter 5 connected in series. The outlet of the inlet booster pump 1 is connected to the inlet of the second membrane filter 5 via a branch line through the second inlet solenoid valve 3. The purified water ends of the first membrane filter 4 and the second membrane filter 5 are connected to the purified water outlet system 7 via a pipeline. The purified water ends of the first membrane filter 4 and the second membrane filter 5 are also connected to the inlet of the inlet booster pump 1 via a return branch line after the pipeline is combined. A return solenoid valve 9 is provided on the return branch line.

[0020] In addition, the purified water end of the first membrane filter 4 and the purified water end of the second membrane filter 5 are connected to the return branch and the purified water outlet system 7 after passing through the post-filter 11 and the purified water TDS probe 12 in sequence via pipeline.

[0021] The purified water outlet system 7 includes a purified water pipeline check valve 71, a purified water flow meter 72, a high-pressure switch 73, a purified water outlet solenoid valve 74, and a purified water faucet 75 installed on the pipeline. These devices can be connected in series in sequence, and the connection order can be appropriately changed if necessary. In addition, the downstream of the high-pressure switch 73 is also connected to the pipeline machine 76 through a branch line.

[0022] The raw water inlet system 8 includes a raw water three-way valve 81, a pre-filter 82, a raw water solenoid valve 83, and a raw water TDS probe 84, which are sequentially installed between the tap water outlet and the inlet booster pump 1. The outlet of the pre-filter 82 is also connected to a domestic water tap 85.

[0023] To avoid unnecessary backflow, one-way valves are installed downstream of the second inlet solenoid valve 3, between the concentrate end of the first membrane filter element 4 and the inlet end of the second membrane filter element 5, between the clean water end of the first membrane filter element 4 and the inlet end of the post-filter element 11, between the clean water end of the second membrane filter element 5 and the inlet end of the post-filter element 11, and between the backflow solenoid valve 9 and the inlet booster pump 1.

[0024] When the second inlet solenoid valve 3 is closed, the water system in this embodiment is a conventional series system, such as... Figure 2 As shown, this is a comparative example. Therefore, by controlling the opening and closing of the inlet solenoid valve 3 (and further controlling the opening and closing of the return solenoid valve 9), two different schemes can be achieved using the same water circuit.

[0025] When the second inlet solenoid valve 3 is opened, it constitutes the water system of this utility model.

[0026] Data were obtained by testing the control example and the different operating conditions described in GB34914-2021 Water Efficiency Limits and Water Efficiency Grades for Water Purifiers.

[0027] In the control example, a total of 9984 L of influent was treated. The initial pure water flow rate of the first membrane filter was 2.66 L / min, gradually decreasing to 2.53 L / min. The initial pure water flow rate of the second membrane filter was 1.83 L / min, gradually decreasing to 1.04 L / min. The initial recovery rate of this water system was 83.15%, gradually decreasing to 78.46%. It can be seen that under this operating mode, the second membrane filter was more severely fouled, hence its pure water flow rate decreased more rapidly.

[0028] To slow down the decline in pure water flow rate of the second membrane filter, the water system of this embodiment was operated and a total of 9844 L of influent was treated. The initial pure water flow rate of the first membrane filter was 2.48 L / min, which gradually decreased to 2.02 L / min. The initial pure water flow rate of the second membrane filter was 2.55 L / min, which gradually decreased to 1.92 L / min. The initial recovery rate of the water system was 85.98%, which gradually decreased to 82.43%.

[0029] As can be seen, on the one hand, the water system of this invention can flexibly adjust its operation mode according to the quality of the incoming water. On the other hand, the water system of this invention can balance the capacity of the first and second stage filter elements, effectively delay the decline of pure water flow in the second membrane filter element, extend the filter element life, and thus improve the recovery rate.

[0030] The recovery rate is calculated as follows: Total clean water volume ÷ (Total clean water volume + Total wastewater volume) × 100%.

Claims

1. A high-water-production-rate water purifier water circuit system, the water circuit system comprising a raw water inlet system (8), a water treatment system, and a purified water outlet system (7), characterized in that... The water treatment system includes an inlet booster pump (1), a first inlet solenoid valve (2), a first membrane filter (4), and a second membrane filter (5) connected in series. The outlet of the inlet booster pump (1) is connected to the inlet of the second membrane filter (5) via a branch line through the second inlet solenoid valve (3). The purified water end of the first membrane filter (4) and the purified water end of the second membrane filter (5) are connected to the purified water outlet system (7) via a pipeline. The purified water end of the first membrane filter (4) and the purified water end of the second membrane filter (5) are connected to the inlet of the inlet booster pump (1) via a return branch line. A return solenoid valve (9) is provided on the return branch line.

2. The water purifier water circuit system according to claim 1, characterized in that... After the water purification end of the first membrane filter (4) and the water purification end of the second membrane filter (5) are merged through a pipeline, a post-filter (11) and a water purification TDS probe (12) are installed on the pipeline.

3. The water purifier water circuit system according to claim 1, characterized in that... The first membrane filter element (4) is a reverse osmosis membrane or nanofiltration membrane filter element, and the second membrane filter element (5) is a reverse osmosis membrane or nanofiltration membrane filter element.

4. The water purifier water circuit system according to claim 1, characterized in that... The purified water outlet system (7) includes a purified water pipeline check valve (71), a purified water flow meter (72), a high-pressure switch (73), a purified water outlet solenoid valve (74), and a purified water faucet (75) installed on the pipeline. The downstream of the high-pressure switch (73) is also connected to the pipeline machine (76) through a branch line.

5. The water purifier water circuit system according to claim 1, characterized in that... The raw water inlet system (8) includes a raw water three-way valve (81), a pre-filter (82), a raw water solenoid valve (83) and a raw water TDS probe (84) arranged sequentially between the tap water outlet and the inlet booster pump (1). The outlet of the pre-filter (82) is also connected to the domestic water tap (85) through a branch.

6. The water purifier water circuit system according to claim 1, characterized in that... One-way valves are respectively installed downstream of the second inlet solenoid valve (3), between the concentrate end of the first membrane filter element (4) and the inlet end of the second membrane filter element (5), between the clean water end of the first membrane filter element (4) and the inlet end of the post-filter element (11), between the clean water end of the second membrane filter element (5) and the inlet end of the post-filter element (11), and between the return solenoid valve (9) and the inlet booster pump (1).

7. The water purifier water circuit system according to claim 1, characterized in that... A wastewater solenoid valve (6) is installed downstream of the concentrate end of the second membrane filter element (5).

8. The water purifier water circuit system according to claim 1, characterized in that... The system also includes a proportional regulating valve (14), which has a first inlet end, a second inlet end and an outlet end. The first inlet end and the second inlet end are respectively connected to the outlet end of the second inlet solenoid valve (3) and the concentrate end of the first membrane filter element (4). The outlet end of the proportional regulating valve (14) is connected to the inlet end of the second membrane filter element (5).

9. A water purifier, characterized in that... The water purifier includes a water circuit system with a high water production rate according to any one of claims 1-8.

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