Double-filter-element waterway structure of water purifier

Abstract

The utility model discloses a double-filter-element waterway structure of a water purifier, which belongs to the technical field of water purifiers and comprises a waterway plate. A raw water channel, a pressurized water outlet channel, a pressurized water inlet channel, a purified water channel, a primary purified water channel, a secondary purified water channel, a waste water channel, a composite filter element assembling position for assembling a composite filter element and an RO filter element assembling position for assembling an RO filter element are arranged on the waterway plate, and a first assembling opening, a second assembling opening, a third assembling opening and a fourth assembling opening are formed in the composite filter element assembling position; the first assembly port is communicated with the raw water channel, the second assembly port is communicated with the pressurized water outlet channel, the third assembly port is communicated with the purified water channel, the fourth assembly port is communicated with the rear pure water channel, and the RO filter element assembly position is provided with an RO filter element water inlet, an RO filter element pure water port and an RO filter element wastewater port; the water inlet of the RO filter element is communicated with the pressurizing water inlet channel, the pure water port of the RO filter element is communicated with the primary pure water channel, and the wastewater port of the RO filter element is communicated with the wastewater channel. The waterway board of the structure is high in integration.

Description

Technical Field

[0001] This utility model relates to the field of water purifier technology, specifically a dual-filter water circuit structure for a water purifier. Background Technology

[0002] With the improvement of people's living standards, purified water is frequently used in production and daily life. However, existing water purification equipment generally uses multiple filter cartridges installed on a water circuit board. Because the water path from the tap water inlet to the main purified water outlet is relatively long, constrained by the water pipe structure and often winding, the connection between the filter cartridges and the water pipes is complex, easily leading to problems such as insufficient water pressure and blocked water flow. Furthermore, the need for pipe connections makes disassembly and assembly complicated, requiring specialized personnel for replacement. The complex water circuit board structure also increases the probability of problems, and the purifier itself is relatively large, with a long outlet pipe, resulting in a large space occupied by the filter cartridges, making it difficult to achieve overall miniaturization of the water purifier product. Therefore, further improvements are necessary. Utility Model Content

[0003] The present invention aims to provide a dual-filter water circuit structure for a water purifier to overcome the shortcomings of the prior art.

[0004] A dual-filter water circuit structure for a water purifier designed for this purpose includes a water circuit board. The water circuit board is provided with a raw water channel, a booster outlet channel, a booster inlet channel, a purified water channel, a primary purified water channel, a secondary purified water channel, a wastewater channel, and a composite filter assembly position for assembling a composite filter element and an RO filter assembly position for assembling an RO filter element. The composite filter assembly position is provided with a first assembly port, a second assembly port, a third assembly port, and a fourth assembly port. The first assembly port is connected to the raw water channel, the second assembly port is connected to the booster outlet channel, the third assembly port is connected to the purified water channel, and the fourth assembly port is connected to the secondary purified water channel. The RO filter assembly position is provided with an RO filter inlet, an RO filter pure water outlet, and an RO filter wastewater outlet. The RO filter inlet is connected to the booster inlet channel, the RO filter pure water outlet is connected to the primary purified water channel, and the RO filter wastewater outlet is connected to the wastewater channel.

[0005] One end of the water circuit board is provided with a raw water inlet, a purified water outlet, a clean water outlet, and a wastewater discharge outlet. The raw water inlet is connected to the raw water channel, the purified water outlet is connected to the purified water channel, the clean water outlet is connected to the clean water channel, and the wastewater discharge outlet is connected to the wastewater channel. The other end of the water circuit board is provided with a primary purified water outlet, which is connected to the primary purified water channel.

[0006] The water circuit board is provided with a booster outlet and a booster inlet on one side. The booster outlet is connected to the booster outlet channel, and the booster inlet is connected to the booster inlet channel.

[0007] The water circuit board has a first primary pure water tributary channel near the pressurized water outlet channel and a second primary pure water tributary channel near the pressurized water inlet channel. The water circuit board has a first primary pure water tributary outlet and a second primary pure water tributary outlet on one side. The first primary pure water tributary outlet is connected to the first primary pure water tributary channel, and the second primary pure water tributary outlet is connected to the second primary pure water tributary channel.

[0008] A first solenoid valve is provided between the second assembly port and the pressurized water outlet channel, and the two are interconnected through the first solenoid valve. A second solenoid valve is provided between the RO filter wastewater outlet and the wastewater channel, and the two are interconnected through the second solenoid valve.

[0009] A third solenoid valve is provided between the pressurized water outlet channel and the first primary pure water tributary channel, and the two are interconnected through the third solenoid valve. A check valve is provided between the second primary pure water tributary channel and the purified water channel, and the two are interconnected through the check valve.

[0010] A TDS probe is installed on the raw water channel, and a high-pressure switch is installed on the purified water channel.

[0011] The composite filter element assembly position is provided with a composite filter element fixing ring, and a composite filter element rotating seat is rotatably provided through the composite filter element fixing ring. The composite filter element is connected to the composite filter element rotating seat and is rotatably engaged or disengaged from the composite filter element fixing ring. The RO filter element assembly position is provided with an RO filter element fixing ring, and an RO filter element rotating seat is rotatably provided through the RO filter element fixing ring. The RO filter element is connected to the RO filter element rotating seat and is rotatably engaged or disengaged from the RO filter element fixing ring.

[0012] The composite filter element is provided with a first connecting port, a second connecting port, a third connecting port, and a fourth connecting port, and the composite filter element rotating seat is provided with a first insertion connecting port, a second insertion connecting port, a third insertion connecting port, and a fourth insertion connecting port.

[0013] The first insertion port is inserted into and connected to the first connection port, and is interconnected with the first assembly port when the composite filter element rotating seat rotates; the second insertion port is inserted into and connected to the second connection port, and is interconnected with the second assembly port when the composite filter element rotating seat rotates; the third insertion port is inserted into and connected to the third connection port, and is interconnected with the third assembly port when the composite filter element rotating seat rotates; the fourth insertion port is inserted into and connected to the fourth connection port, and is interconnected with the fourth assembly port when the composite filter element rotating seat rotates.

[0014] The RO filter element is provided with a water inlet, a pure water outlet, and a wastewater outlet, and the RO filter element rotating base is provided with a water inlet connector, a pure water connector, and a wastewater connector.

[0015] The water inlet connector is connected to the water inlet and is interconnected with the RO filter element inlet when the RO filter element rotating seat rotates. The pure water connector is connected to the pure water outlet and is interconnected with the RO filter element pure water outlet when the RO filter element rotating seat rotates. The wastewater connector is connected to the wastewater outlet and is interconnected with the RO filter element wastewater outlet when the RO filter element rotating seat rotates.

[0016] A sealing element is provided between the first plug-in connection port and the first assembly port, between the second plug-in connection port and the second assembly port, between the third plug-in connection port and the third assembly port, between the fourth plug-in connection port and the fourth assembly port, between the water inlet plug-in connection port and the RO filter element inlet, between the pure water plug-in connection port and the RO filter element pure water outlet, and between the wastewater plug-in connection port and the RO filter element wastewater outlet, and they are connected to each other in a sealed manner through the sealing element.

[0017] Through the improvement of the above structure, this utility model provides a composite filter assembly position and an RO filter assembly position on the water circuit board, so that the composite filter and RO filter can be assembled on the water circuit board respectively. At the same time, the water circuit board integrates a raw water channel, a boosted water outlet channel (3), a boosted water inlet channel, a purified water channel, a primary pure water channel, a secondary pure water channel, and a wastewater channel. This not only enables the composite filter and RO filter to effectively purify the raw water, but also improves the integration of the water circuit board, thereby reducing the complexity of the connection between the water circuit board and the water pipes and simplifying the disassembly and assembly operations. At the same time, the boosted water outlet and inlet can be used to ensure the water pressure of the water channels inside the water circuit board, so as to ensure the smooth flow between the water channels. In addition, due to the high integration of the water circuit board, the space of the water circuit board can be effectively utilized, reducing space waste, thereby saving the space occupied by the water circuit board in the water purifier, which is conducive to the miniaturization of the overall water purifier product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the assembly cross-sectional structure of an embodiment of the present invention.

[0022] Figure 5 This is an exploded structural diagram of an embodiment of the present invention.

[0023] Figure 6 This is an exploded structural diagram from another perspective of an embodiment of the present invention.

[0024] Figure 7 This is an exploded structural diagram of the water circuit board, composite filter element retaining ring, composite filter element rotating seat, RO filter element retaining ring, RO filter element rotating seat, and sealing components.

[0025] Figure 8 This is an exploded structural diagram from another perspective of the water circuit board, composite filter element retaining ring, composite filter element rotating seat, RO filter element retaining ring, RO filter element rotating seat, and sealing components. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] See Figures 1-8The dual-filter water circuit structure of this water purifier includes a water circuit plate 1, which is equipped with a raw water channel 2, a booster water outlet channel 3, a booster water inlet channel 4, a purified water channel 5, a primary pure water channel 6, a secondary pure water channel 7, a wastewater channel 8, a composite filter assembly position 9 for assembling the composite filter element 100, and an RO filter assembly position 10 for assembling the RO filter element 200. The composite filter assembly position 9 is equipped with a first assembly port 9.1, a second assembly port 9.2, a third assembly port 9.3, and a fourth assembly port 9.4. The first assembly port 9.1 connects to the raw water channel. 2. The second assembly port 9.2 is interconnected with the booster water outlet channel 3, the third assembly port 9.3 is interconnected with the purified water channel 5, and the fourth assembly port 9.4 is interconnected with the downstream pure water channel 7. The RO filter element assembly position 10 is equipped with an RO filter element inlet 10.1, an RO filter element pure water outlet 10.2, and an RO filter element wastewater outlet 10.3. The RO filter element inlet 10.1 is interconnected with the booster water inlet channel 4, the RO filter element pure water outlet 10.2 is interconnected with the primary pure water channel 6, and the RO filter element wastewater outlet 10.3 is interconnected with the wastewater channel 8.

[0029] In this embodiment, a composite filter element assembly position 9 and an RO filter element assembly position 10 are provided on the water circuit board 1, so that the composite filter element 100 and the RO filter element 200 can be assembled on the water circuit board 1 respectively. At the same time, the water circuit board 1 integrates a raw water channel 2, a boosted water outlet channel 3, a boosted water inlet channel 4, a purified water channel 5, a primary pure water channel 6, a secondary pure water channel 7, and a wastewater channel 8. This not only enables the composite filter element 100 and the RO filter element 200 to effectively purify the raw water, but also improves the integration of the water circuit board 1, thereby reducing the complexity of the connection between the water circuit board 1 and the water pipes and simplifying the disassembly and assembly operations. At the same time, the boosted water outlet and inlet can be used to ensure the water pressure in the water channels inside the water circuit board 1, so as to ensure the smooth flow between the water channels. In addition, due to the high integration of the water circuit board 1, the space of the water circuit board 1 can be effectively utilized, reducing space waste, thereby saving the space occupied by the water circuit board 1 in the water purifier, which is conducive to the miniaturization of the overall water purifier product.

[0030] One end of the water circuit board 1 is equipped with a raw water inlet 1.1, a purified water outlet 1.2, a clean water outlet 1.3, and a wastewater discharge outlet 1.4. The raw water inlet 1.1 is connected to the raw water channel 2, the purified water outlet 1.2 is connected to the purified water channel 7, the clean water outlet 1.3 is connected to the clean water channel 5, and the wastewater discharge outlet 1.4 is connected to the wastewater channel 8. The other end of the water circuit board 1 is equipped with a primary purified water outlet 1.5, which is connected to the primary purified water channel 6.

[0031] A booster outlet 1.6 and a booster inlet 1.7 are provided on one side of the water circuit board 1. The booster outlet 1.6 is connected to the booster outlet channel 3, and the booster inlet 1.7 is connected to the booster inlet channel 4.

[0032] In this embodiment, the booster outlet 1.6 is connected to the inlet of the booster pump, and the booster inlet 1.7 is connected to the outlet of the booster pump, thereby realizing the pressurization of the water channel in the water circuit board 1.

[0033] The water circuit board 1 has a first primary pure water tributary channel 11 near the booster water outlet channel 3 and a second primary pure water tributary channel 12 near the booster water inlet channel 4. The water circuit board 1 has a first primary pure water tributary outlet 1.8 and a second primary pure water tributary outlet 1.9 on one side. The first primary pure water tributary outlet 1.8 is connected to the first primary pure water tributary channel 11, and the second primary pure water tributary outlet 1.9 is connected to the second primary pure water tributary channel 12.

[0034] In this embodiment, the raw water channel 2, the post-pure water channel 7, the purified water channel 5, and the wastewater channel 8 are arranged side by side and parallel to each other. The initial pure water channel 6 and the post-pure water channel 7 extend along the same axis. The booster outlet channel 3 and the first initial pure water branch channel 11 are arranged adjacent to each other. The booster inlet channel 4 and the second initial pure water branch channel 12 are arranged adjacent to each other. The booster outlet channel 3, the first initial pure water branch channel 11, the booster inlet channel 4, and the second initial pure water branch channel 12 are parallel to each other. The first initial pure water branch channel 11 and the second initial pure water branch channel 12 are both perpendicular to the initial pure water channel 6. In this way, the space of the water circuit board 1 can be used reasonably, and the space utilization rate and integration of the water circuit board 1 can be improved.

[0035] A first solenoid valve A1 is installed between the second assembly port 9.2 and the booster outlet channel 3, and the two are interconnected through the first solenoid valve A1. A second solenoid valve A2 is installed between the RO filter wastewater port 10.3 and the wastewater channel 8, and the two are interconnected through the second solenoid valve A2. A third solenoid valve A3 is installed between the booster outlet channel 3 and the first primary pure water branch channel 11, and the two are interconnected through the third solenoid valve A3. In this way, the composite filter element 100, RO filter element 200, booster outlet channel 3, wastewater channel 8, and first primary pure water branch channel 11 are interconnected with each other.

[0036] A check valve A4 is provided between the second primary pure water branch channel 12 and the purified water channel 5, and the two are connected through the check valve A4, so that the water in the second primary pure water branch channel 12 can flow unidirectionally towards the purified water channel 5 under pressure.

[0037] A TDS probe A5 is installed on the raw water channel 2 to detect the raw water in the raw water channel 2.

[0038] A high-pressure switch A6 is installed on the water purification channel 5 to prevent the pressure tank connected to the water purification channel 5 from overflowing.

[0039] A composite filter element fixing ring 13 is provided on the composite filter element assembly position 9, and a composite filter element rotating seat 14 is rotatably provided through the composite filter element fixing ring 13. The composite filter element 100 is connected to the composite filter element rotating seat 14 and is rotatably engaged or disengaged from the composite filter element fixing ring 13. An RO filter element fixing ring 15 is provided on the RO filter element assembly position 10, and an RO filter element rotating seat 16 is rotatably provided through the RO filter element fixing ring 15. The RO filter element 200 is connected to the RO filter element rotating seat 16 and is rotatably engaged or disengaged from the RO filter element fixing ring 15.

[0040] The composite filter element 100 is provided with a first connecting port 101, a second connecting port 102, a third connecting port 103, and a fourth connecting port 104. The composite filter element rotating seat 14 is provided with a first insertion connecting port 14.1, a second insertion connecting port 14.2, a third insertion connecting port 14.3, and a fourth insertion connecting port 14.4.

[0041] Specifically, the first insertion port 14.1 is inserted into and connected to the first connection port 101, and is interconnected with the first assembly port 9.1 when the composite filter element rotating seat 14 rotates; the second insertion port 14.2 is inserted into and connected to the second connection port 102, and is interconnected with the second assembly port 9.2 when the composite filter element rotating seat 14 rotates; the third insertion port 14.3 is inserted into and connected to the third connection port 103, and is interconnected with the third assembly port 9.3 when the composite filter element rotating seat 14 rotates; and the fourth insertion port 14.4 is inserted into and connected to the fourth connection port 104, and is interconnected with the fourth assembly port 9.4 when the composite filter element rotating seat 14 rotates.

[0042] The RO filter element 200 is equipped with an inlet 201, a pure water outlet 202, and a wastewater outlet 203. The RO filter element rotating seat 16 is equipped with an inlet plug connection port 16.1, a pure water plug connection port 16.2, and a wastewater plug connection port 16.3.

[0043] The water inlet connector 16.1 is connected to the water inlet 201 and is interconnected with the RO filter element inlet 10.1 when the RO filter element rotating seat 16 rotates. The pure water connector 16.2 is connected to the pure water outlet 202 and is interconnected with the RO filter element pure water outlet 10.2 when the RO filter element rotating seat 16 rotates. The wastewater connector 16.3 is connected to the wastewater outlet 203 and is interconnected with the RO filter element wastewater outlet 10.3 when the RO filter element rotating seat 16 rotates.

[0044] In this embodiment, the composite filter element fixing ring 13 and the RO filter element fixing ring 15 are fixed to the composite filter element assembly position 9 and the RO filter element assembly position 10 respectively by fasteners. At the same time, there are gap grooves between the composite filter element fixing ring 13 and the composite filter element assembly position 9, and between the RO filter element fixing ring 15 and the RO filter element assembly position 10. The composite filter element rotating seat 14 and the RO filter element rotating seat 16 can rotate and link with the composite filter element 100 and the RO filter element 200 respectively. The composite filter element rotating seat 14 and the RO filter element rotating seat 16 are respectively positioned and rotated on the gap grooves.

[0045] Meanwhile, the composite filter element 100 and the RO filter element 200 are respectively provided with buckles, and the composite filter element fixing ring 13 and the RO filter element fixing ring 15 are respectively provided with slots. The composite filter element 100 and the RO filter element 200 are respectively fastened to the slots by rotating the buckles to realize the assembly of the composite filter element 100 and the RO filter element 200, or the buckles can be rotated and separated from the slots to realize the removal of the composite filter element 100 and the RO filter element 200.

[0046] In addition, the composite filter element rotating seat 14 and the RO filter element rotating seat 16 are respectively provided with positioning shafts, which are respectively positioned and inserted into the positioning holes on the composite filter element 100 and the RO filter element 200. At the same time, the composite filter element assembly position 9 and the RO filter element assembly position 10 are respectively provided with arc-shaped grooves. When the composite filter element rotating seat 14 and the RO filter element rotating seat 16 rotate, they slide along the trajectory of the arc-shaped grooves through the positioning shafts to limit the rotation position of the composite filter element 100, the composite filter element rotating seat 14, the RO filter element 200, and the RO filter element rotating seat 16.

[0047] A sealing element 17 is provided between the first insertion connection port 14.1 and the first assembly port 9.1, between the second insertion connection port 14.2 and the second assembly port 9.2, between the third insertion connection port 14.3 and the third assembly port 9.3, between the fourth insertion connection port 14.4 and the fourth assembly port 9.4, between the water inlet connection port 16.1 and the RO filter element inlet port 10.1, between the pure water connection port 16.2 and the RO filter element pure water outlet 10.2, and between the wastewater connection port 16.3 and the RO filter element wastewater outlet 10.3, and they are connected to each other in a sealed manner through the sealing element 17.

[0048] In this embodiment, sealing grooves are respectively provided on the first assembly port 9.1, the second assembly port 9.2, the third assembly port 9.3, the fourth assembly port 9.4, the RO filter element inlet 10.1, the RO filter element pure water outlet 10.2, and the RO filter element wastewater outlet 10.3. The sealing element 17 is positioned on the sealing groove. At the same time, the bottom surfaces of the composite filter element rotating seat 14 and the RO filter element rotating seat 16 are flat and are rotated and pressed onto the sealing element 17, thereby achieving the sealing between the composite filter element rotating seat 14, the RO filter element rotating seat 16 and the water circuit plate 1.

[0049] In this embodiment, the composite filter element 100 is a three-in-one composite filter element, which includes PP + carbon rod as a pre-filter and carbon rod as a post-filter, with a water channel separating the pre-filter and the post-filter.

[0050] During use, raw water enters the raw water channel 2, passes through the first assembly port 9.1 into the first connecting port 101 of the composite filter element 100, undergoes pre-filtration by the pre-PP + carbon rod of the composite filter element 100, and then returns through the second connecting port 102 of the composite filter element 100 to the second assembly port 9.2 of the water circuit board 1. It then passes through the solenoid valve A1 and into the booster outlet channel 3, where it is pressurized by the booster pump and enters the RO filter element inlet port 10.1 through the booster inlet channel 4. Finally, it enters the RO filter element 200 inlet port 201 for filtration. The water filtered by the RO filter element 200 is then purified into pure water. Outlet 202 and RO filter pure water inlet 10.2 enter the primary pure water channel 6. The water in the primary pure water channel 6 flows into the first primary pure water branch channel 11 and the second primary pure water branch channel 12. The water in the second primary pure water branch channel 12 then enters the clean water channel 5 through check valve A4. The water in the clean water channel 5 enters the post-carbon rod of the composite filter 100 through the third assembly port 9.3 and the third connecting port 103 for further filtration. Then, it returns to the fourth assembly port 9.4 of the water circuit board 1 through the fourth connecting port 104 of the composite filter 100 and enters the rear pure water channel 7.

[0051] Wastewater discharged from RO filter 200 is discharged to wastewater channel 8 through the second solenoid valve A2.

[0052] If the purified water is not used for a long time, the third solenoid valve A3 will work, allowing the water in the first pure water branch channel 11 to flow into the booster outlet channel 3, and then be boosted by the booster pump before entering the RO filter inlet 10.1 through the booster inlet channel 4 for further filtration, ensuring that the water output is fresh.

[0053] Water that has not passed through the post-carbon rod filter of composite filter element 100 can flow directly from the purified water channel 5 and the primary pure water channel 6 to supply soft water, such as for use in steam ovens, washing machines, smart toilets, floor heating systems, etc.

[0054] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A dual-filter water circuit structure for a water purifier, comprising a water circuit board (1), characterized in that: The water circuit board (1) is provided with a raw water channel (2), a booster water outlet channel (3), a booster water inlet channel (4), a purified water channel (5), a primary pure water channel (6), a secondary pure water channel (7), a wastewater channel (8), a composite filter element assembly position (9) for assembling a composite filter element (100), and an RO filter element assembly position (10) for assembling an RO filter element (200). The composite filter element assembly position (9) is provided with a first assembly port (9.1), a second assembly port (9.2), a third assembly port (9.3), and a fourth assembly port (9.4). The first assembly port (9.1) is connected to the raw water channel (2), and the second assembly port (9.2) is connected to the primary pure water channel (2). The RO filter element assembly position (10) is connected to the pressurized water outlet channel (3), the third assembly port (9.3) is connected to the purified water channel (5), the fourth assembly port (9.4) is connected to the post-pure water channel (7), and the RO filter element assembly position (10) is provided with an RO filter element inlet (10.1), an RO filter element pure water outlet (10.2), and an RO filter element wastewater outlet (10.3); the RO filter element inlet (10.1) is connected to the pressurized water inlet channel (4), the RO filter element pure water outlet (10.2) is connected to the primary pure water channel (6), and the RO filter element wastewater outlet (10.3) is connected to the wastewater channel (8).

2. The double filter cartridge waterway structure of the water purifier according to claim 1, characterized in that: One end of the water circuit board (1) is provided with a raw water inlet (1.1), a purified water outlet (1.2), a clean water outlet (1.3), and a wastewater discharge outlet (1.4). The raw water inlet (1.1) is connected to the raw water channel (2), the purified water outlet (1.2) is connected to the purified water channel (7), the clean water outlet (1.3) is connected to the clean water channel (5), and the wastewater discharge outlet (1.4) is connected to the wastewater channel (8). The other end of the water circuit board (1) is provided with a primary purified water outlet (1.5), which is connected to the primary purified water channel (6).

3. The double filter cartridge waterway structure of the water purifier according to claim 2, characterized in that: The water circuit board (1) is provided with a booster outlet (1.6) and a booster inlet (1.7) on one side. The booster outlet (1.6) is connected to the booster outlet channel (3), and the booster inlet (1.7) is connected to the booster inlet channel (4).

4. The double filter cartridge waterway structure of the water purifier according to claim 3, characterized in that: The water circuit board (1) has a first primary pure water tributary channel (11) near the pressurized water outlet channel (3) and a second primary pure water tributary channel (12) near the pressurized water inlet channel (4). The water circuit board (1) has a first primary pure water tributary outlet (1.8) and a second primary pure water tributary outlet (1.9) on one side. The first primary pure water tributary outlet (1.8) is connected to the first primary pure water tributary channel (11), and the second primary pure water tributary outlet (1.9) is connected to the second primary pure water tributary channel (12).

5. The double filter cartridge waterway structure of the water purifier according to claim 4, characterized in that: A first solenoid valve (A1) is provided between the second assembly port (9.2) and the pressurized water outlet channel (3), and the two are connected to each other through the first solenoid valve (A1). A second solenoid valve (A2) is provided between the RO filter wastewater outlet (10.3) and the wastewater channel (8), and the two are connected to each other through the second solenoid valve (A2).

6. The dual-filter water circuit structure of the water purifier according to claim 5, characterized in that: A third solenoid valve (A3) is provided between the pressurized water outlet channel (3) and the first primary pure water tributary channel (11), and the two are connected to each other through the third solenoid valve (A3). A check valve (A4) is provided between the second primary pure water tributary channel (12) and the purified water channel (5), and the two are connected through the check valve (A4).

7. The dual-filter water circuit structure of the water purifier according to claim 1, characterized in that: A TDS probe (A5) is installed on the raw water channel (2), and a high-pressure switch (A6) is installed on the purified water channel (5).

8. The double filter cartridge waterway structure of the water purifier according to claim 1, characterized in that: The composite filter element assembly position (9) is provided with a composite filter element fixing ring (13), and a composite filter element rotating seat (14) is rotatably provided through the composite filter element fixing ring (13). The composite filter element (100) is connected to the composite filter element rotating seat (14) and is rotatably engaged or disengaged from the composite filter element fixing ring (13). The RO filter element assembly position (10) is provided with an RO filter element fixing ring (15), and an RO filter element rotating seat (16) is rotatably provided through the RO filter element fixing ring (15). The RO filter element (200) is connected to the RO filter element rotating seat (16) and is rotatably engaged or disengaged from the RO filter element fixing ring (15).

9. The double filter cartridge waterway structure of the water purifier according to claim 8, characterized in that: The composite filter element (100) is provided with a first connecting port (101), a second connecting port (102), a third connecting port (103), and a fourth connecting port (104), and the composite filter element rotating seat (14) is provided with a first insertion connecting port (14.1), a second insertion connecting port (14.2), a third insertion connecting port (14.3), and a fourth insertion connecting port (14.4). Wherein, the first insertion connection port (14.1) is inserted into and connected to the first connection port (101), and is interconnected with the first assembly port (9.1) when the composite filter element rotating seat (14) rotates; the second insertion connection port (14.2) is inserted into and connected to the second connection port (102), and is interconnected with the second assembly port (9.2) when the composite filter element rotating seat (14) rotates; the third insertion connection port (14.3) is inserted into and connected to the third connection port (103), and is interconnected with the third assembly port (9.3) when the composite filter element rotating seat (14) rotates; the fourth insertion connection port (14.4) is inserted into and connected to the fourth connection port (104), and is interconnected with the fourth assembly port (9.4) when the composite filter element rotating seat (14) rotates. The RO filter element (200) is provided with a water inlet (201), a pure water outlet (202), and a wastewater outlet (203), and the RO filter element rotating seat (16) is provided with a water inlet plug-in connection port (16.1), a pure water plug-in connection port (16.2), and a wastewater plug-in connection port (16.3). The water inlet connector (16.1) is connected to the water inlet (201) and is interconnected with the RO filter element inlet (10.1) when the RO filter element rotating seat (16) rotates. The pure water connector (16.2) is connected to the pure water outlet (202) and is interconnected with the RO filter element pure water outlet (10.2) when the RO filter element rotating seat (16) rotates. The wastewater connector (16.3) is connected to the wastewater outlet (203) and is interconnected with the RO filter element wastewater outlet (10.3) when the RO filter element rotating seat (16) rotates.

10. The double filter cartridge waterway structure of the water purifier according to claim 9, characterized in that: A sealing element (17) is provided between the first plug-in connection port (14.1) and the first assembly port (9.1), between the second plug-in connection port (14.2) and the second assembly port (9.2), between the third plug-in connection port (14.3) and the third assembly port (9.3), between the fourth plug-in connection port (14.4) and the fourth assembly port (9.4), between the water inlet plug-in connection port (16.1) and the RO filter element inlet (10.1), between the pure water plug-in connection port (16.2) and the RO filter element pure water outlet (10.2), and between the wastewater plug-in connection port (16.3) and the RO filter element wastewater outlet (10.3), and they are mutually sealed and connected through the sealing element (17).

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