Waterway system of RO (Reverse Osmosis) filter element

Abstract

The invention relates to the technical field of RO (reverse osmosis) filter elements, in particular to a waterway system of an RO filter element, which comprises an outer cylinder, an RO membrane, an RO membrane central tube and an RO membrane inner central tube, the RO membrane inner central tube is mounted in the RO membrane central tube, the RO membrane central tube is mounted in the RO membrane, and the RO membrane is mounted in the outer cylinder; a water inlet, a purified water port and a waste water port are formed in the lower end of the outer cylinder, and valve assemblies are mounted in the water inlet, the purified water port and the waste water port respectively; a water channel I is formed in the RO membrane inner central pipe, and the water inlet is communicated with the water channel I; a water channel II is formed between the outer wall of the RO membrane and the inner wall of the outer cylinder, and the water purification port is communicated with the water channel II; a water channel III is formed between the outer wall of the RO membrane inner central pipe and the inner wall of the RO membrane central pipe, and the water channel III is communicated with the water channel II. The RO membrane is of a double-layer central pipe waterway structure, the trend of a water inlet waterway is not limited, it is guaranteed that a large amount of purified water is reserved in a waterway system of the RO filter element, and the TDS rising phenomenon cannot be caused.

Description

Technical Field

[0001] The invention relates to the technical field of RO filter elements, in particular to a water channel system of an RO filter element. Background Art

[0002] The utility model patent with announcement number CN218507603U discloses an RO filter element, including a filter element barrel, an RO membrane, a water stop valve, a bottom cover, a U-shaped decorative cover and a handle. The RO membrane is inserted in the filter element barrel. A wastewater port, a clean water port and a water inlet are sequentially opened at one end of the filter element barrel. A water stop valve is arranged in the wastewater port and the clean water port. The water stop valve includes a valve core, a valve seat, a return spring, a valve core sealing ring, and a valve seat sealing ring. The return spring is sleeved on the periphery of the valve core. One end of the valve core and the return spring must be inserted in the valve seat. The valve core sealing ring is sleeved on the end of the valve core. The valve seat sealing ring is sleeved on the periphery of the valve seat. The drain pipe of the RO membrane is connected to the clean water port, and the wastewater port and the water inlet are respectively connected to the inner cavity of the filter element barrel. The defect of this RO filter element is that its RO membrane is a single-layer central tube water channel structure, and the direction of the water inlet is restricted. A large amount of raw water and mixed wastewater accumulate in the membrane body from the outer wall of the RO membrane. During use, it will cause secondary neutralization pollution of the first cup of water, increase TDS or stink, and cannot guarantee the stability of water purity.

[0003] Therefore, there is still room for improvement in the prior art. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention proposes a water channel system of an RO filter element. The RO membrane uses a double-layer central tube water channel structure, which does not limit the direction of the water channel of the water inlet. The water enters from the central tube inside the RO membrane or from the wastewater outlet. By reducing the volume of the water inlet channel, a large amount of pure water is ensured to remain in the water channel system of the RO filter element, which will not cause the TDS to increase, thereby ensuring the stability of the purity of the water quality.

[0005] In order to achieve the above object, the technical solution applied by the present invention is as follows:

[0006] A water system of an RO filter element comprises an outer cylinder, an RO membrane, an RO membrane central tube and an RO membrane inner central tube; the RO membrane inner central tube is installed inside the RO membrane central tube, the RO membrane central tube is installed inside the RO membrane, and the RO membrane is installed inside the outer cylinder; a water inlet, a clean water outlet and a waste water outlet are provided at the lower end of the outer cylinder, and valve assemblies are respectively installed in the water inlet, the clean water outlet and the waste water outlet; a water channel 1 is formed in the RO membrane inner central tube, and the water inlet is connected to the water channel 1; a water channel 2 is formed between the outer wall of the RO membrane and the inner wall of the outer cylinder, and the clean water outlet is connected to the water channel 2; a water channel 3 is formed between the outer wall of the RO membrane inner central tube and the inner wall of the RO membrane central tube, and the water channel 3 is connected to the water channel 2.

[0007] According to the above scheme, the lower end of the RO membrane center tube is provided with an opening for facilitating the installation of the center tube inside the RO membrane, the upper end of the RO membrane center tube is formed with a baffle, the baffle is provided with a center hole matching with the waterway channel 1, the outer periphery of the center hole is provided with a plurality of water string holes 2, and the outer wall of the RO membrane center tube is provided with a plurality of water string holes 1.

[0008] According to the above scheme, a lower end cap is fixed to the lower end of the RO membrane, and an upper end cap is fixed to the upper end of the RO membrane. The upper end cap is provided with a plurality of through holes that cooperate with the second water string hole.

[0009] According to the above solution, the upper end of the outer cylinder is provided with an opening for facilitating the installation of the RO membrane, an outer end cover is detachably mounted on the opening, and a limiting assembly is provided between the outer end cover and the upper end cover.

[0010] According to the above scheme, the limiting assembly includes a limiting groove arranged at the center of the inner wall of the outer end cover and a limiting block arranged at the center of the outer wall of the upper end cover, and the limiting block is arranged corresponding to the limiting groove.

[0011] According to the above solution, a decorative handle is fixed to the outer side of the outer end cover, and a LOGO identification piece is fixed to the outer side of the decorative handle.

[0012] According to the above scheme, a silicone ring five is sleeved on the outer wall of the lower end of the central tube inside the RO membrane, and a silicone ring four is sleeved on the outer wall of the upper end of the central tube inside the RO membrane.

[0013] According to the above solution, a silicone ring three is provided on the outside of the water string hole two.

[0014] According to the above solution, a silicone ring 6 is sleeved on the outer wall of the lower end cover.

[0015] According to the above scheme, the valve assembly includes an ultrasonic cover, a water shut-off accessory and a water shut-off part. A second silicone ring is sleeved on the outer wall of the upper end of the water shut-off part. The lower end of the water shut-off part is located in the water shut-off accessory. A spring is provided in the water shut-off accessory. The spring is sleeved on the lower end of the water shut-off part. The two ends of the spring are respectively abutted against the water shut-off part and the water shut-off accessory. The ultrasonic cover is fixed on the outer cylinder. A silicone ring is provided between the ultrasonic cover and the water shut-off accessory.

[0016] Beneficial effects of the present invention:

[0017] The present invention is configured such that the RO membrane uses a double-layer central tube water channel structure, which does not limit the direction of the water channel of the water inlet. The water enters from the central tube inside the RO membrane or from the wastewater outlet. By reducing the volume of the water inlet channel, a large amount of pure water is ensured to remain in the water channel system of the RO filter element, and the TDS will not increase, thereby ensuring the stability of the pure water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded view of the overall structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 3 yes Figure 2 A magnified image of position A in the middle;

[0021] Figure 4 yes Figure 2 Enlarged view of position B in the middle;

[0022] Figure 5 This is a schematic diagram of the baffle at the end of the RO membrane central tube;

[0023] Figure 6 It is a schematic diagram of the direction of a waterway of the present invention;

[0024] Figure 7 This is a schematic diagram of the second direction of the waterway of the present invention;

[0025] Figure 8 It is a schematic diagram of assembling the central tube inside the RO membrane and the central tube of the RO membrane of the present invention.

[0026] In the figure:

[0027] 1. Ultrasonic cover; 2. Silicone ring one; 3. Spring; 4. Water cut-off accessories; 5. Water cut-off parts; 6. Silicone ring two; 7. Outer cylinder; 8. RO membrane; 9. RO membrane center tube; 91. Water string hole one; 92. Water string hole two; 93. Baffle; 94. Center hole; 10. Silicone ring three; 11. RO membrane inner center tube; 12. Silicone ring four; 13. Silicone ring five; 14. Upper end cover; 141. Through hole; 142. Limit block; 15. Lower end cover; 16. Outer end cover; 161. Limit groove; 17. Decorative handle; 18. LOGO part; 19. Silicone ring six; 21. Water channel one; 22. Water channel two; 23. Water channel three; 31. Water inlet; 32. Water purification outlet; 33. Wastewater outlet. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figures 1 to 8As shown, a water system of an RO filter element described in the present invention comprises an outer cylinder 7, an RO membrane 8, an RO membrane central tube 9 and an RO membrane inner central tube 11; the RO membrane inner central tube 11 is installed inside the RO membrane central tube 9, the RO membrane central tube 9 is installed inside the RO membrane 8, and the RO membrane 8 is installed inside the outer cylinder 7; a water inlet 31, a clean water outlet 32 ​​and a waste water outlet 33 are provided at the lower end of the outer cylinder 7, and valve assemblies are respectively installed in the water inlet 31, the clean water outlet 32 ​​and the waste water outlet 33; a water channel 1 21 is formed in the RO membrane inner central tube 11, and the water inlet 31 is connected to the water channel 1 21; a water channel 2 22 is formed between the outer wall of the RO membrane 8 and the inner wall of the outer cylinder 7, and the clean water outlet 32 ​​is connected to the water channel 2 22; a water channel 3 23 is formed between the outer wall of the RO membrane inner central tube 11 and the inner wall of the RO membrane central tube 9, and the water channel 3 23 is connected to the water channel 2 22. With this arrangement, the RO membrane 8 uses a double-layer central tube water channel structure, which does not limit the direction of the water channel at the water inlet. Water enters from the central tube inside the RO membrane or from the wastewater outlet. By reducing the volume of the water inlet channel, a large amount of pure water is ensured to remain in the water channel system of the RO filter element, which will not cause an increase in TDS, thereby ensuring the stability of the pure water quality.

[0030] More specifically, according to the forward and reverse osmosis of the RO membrane 8, its water path has two modes:

[0031] Waterway 1: Water enters waterway channel 1 21 through water inlet 31, enters waterway channel 3 23 after passing through RO membrane 8, and then flows back to waterway channel 2 22 in a circular flow. Clean water is discharged from clean water outlet 32, and waste water is discharged from waste water outlet 33;

[0032] Waterway 2: Water enters waterway channel 3 23 through wastewater outlet 33 and RO membrane 8, and then flows back to waterway channel 2 22, circulates, and clean water is discharged from clean water outlet 32, and wastewater is discharged from water inlet 31 after passing through waterway channel 1 21;

[0033] The present invention reduces the volume of the water inlet channel so that the volume of clean water in the filter element is much larger than the volume of the water inlet. After the machine stops running, the forward osmosis of the RO membrane 8 will not cause TDS increase in a short period of time.

[0034] Furthermore, the lower end of the RO membrane center tube 9 is provided with an opening for facilitating the installation of the RO membrane inner center tube 11, and the upper end of the RO membrane center tube 9 is formed with a baffle 93, the baffle 93 is provided with a center hole 94 that cooperates with the water channel 1 21, and the outer periphery of the center hole 94 is provided with a plurality of water string holes 2 92, and the outer wall of the RO membrane center tube 9 is provided with a plurality of water string holes 1 91. With such arrangement, during assembly, the central tube 11 inside the RO membrane is assembled in the central tube 9 of the RO membrane through the opening, and the outlet of the central tube 11 inside the RO membrane (or the outlet of the water channel 1 21) cooperates with the central hole 94, so that water flows through the water channel 1 21 into the water channel 2 22, wherein the water in the water channel 2 22 passes through the RO membrane 8 and then enters the water channel 3 23 through the multiple water string holes 1 91, and the water in the water channel 3 23 returns to the water channel 2 22 through the water string holes 2 92, and circulates, so that the first cup of water is not polluted and the TDS does not increase, thereby ensuring the stability of the purity of the water quality.

[0035] Specifically, a lower end cap 15 is fixed to the lower end of the RO membrane 8, and an upper end cap 14 is fixed to the upper end of the RO membrane 8. The upper end cap 14 is provided with a plurality of through holes 141 arranged in cooperation with the second water string hole 92. In this way, the water in the third water channel 23 passes through the second water string hole 92 and then returns to the second water channel 22 through the through holes 141.

[0036] Furthermore, an opening is provided at the upper end of the outer cylinder 7 for facilitating installation of the RO membrane 8 , an outer end cover 16 is detachably mounted on the opening, and a limiting assembly is provided between the outer end cover 16 and the upper end cover 14 .

[0037] Furthermore, the limiting assembly includes a limiting groove 161 provided at the center of the inner wall of the outer end cover 16 and a limiting block 142 provided at the center of the outer wall of the upper end cover 14, and the limiting block 142 is provided corresponding to the limiting groove 161. In this way, after assembly, the RO membrane 8, the RO membrane central tube 9 and the RO membrane inner central tube 11 will not tilt relative to the outer cylinder 7, which will affect the waterway performance.

[0038] Furthermore, a decorative handle 17 is fixed to the outer side of the outer end cover 16, and a LOGO identification piece 18 is fixed to the outer side of the decorative handle 17. This arrangement facilitates the movement of the RO filter element.

[0039] Further, a silicone ring 5 13 is sleeved on the outer wall of the lower end of the RO membrane inner central tube 11, and a silicone ring 4 12 is sleeved on the outer wall of the upper end of the RO membrane inner central tube 11. In this arrangement, the silicone ring 5 13 can seal the lower end of the RO membrane central tube 9 and the lower end of the RO membrane inner central tube 11, and the silicone ring 4 12 can seal the upper end of the RO membrane central tube 9 and the upper end of the RO membrane inner central tube 11 to prevent water leakage.

[0040] Further, the outer sleeve of the water string hole 2 92 is provided with a silicone ring 3 10. This arrangement can seal the upper end of the RO membrane central tube 9 and the upper end cover 14 to prevent water leakage.

[0041] Further, a silicone ring 6 19 is sleeved on the outer wall of the lower end cover 15. This arrangement can make the lower end cover 15 and the outer cylinder 7 tightly sealed to prevent water leakage.

[0042] Further, the valve assembly includes an ultrasonic cover 1, a water cut-off fitting 4 and a water cut-off member 5, a silicone ring 2 6 is sleeved on the outer wall of the upper end of the water cut-off member 5, the lower end of the water cut-off member 5 is located in the water cut-off fitting 4, a spring 3 is arranged in the water cut-off fitting 4, the spring 3 is sleeved on the lower end of the water cut-off member 5, the two ends of the spring 3 are respectively abutted against the water cut-off member 5 and the water cut-off fitting 4, the ultrasonic cover 1 is fixed on the outer cylinder 7, and a silicone ring 2 is arranged between the ultrasonic cover 1 and the water cut-off fitting 4. In this arrangement, when the upper end of the water cut-off member 5 rises and separates from the water cut-off fitting 4, the spring 3 is compressed, and the water path is opened. When the water cut-off member 5 is not subjected to force, it is reset under the rebound force of the spring 3, and the water path is closed.

[0043] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A water system of an RO filter element, characterized by: It comprises an outer cylinder (7), an RO membrane (8), an RO membrane central tube (9) and an RO membrane inner central tube (11); The RO membrane inner central tube (11) is installed inside the RO membrane central tube (9), the RO membrane central tube (9) is installed inside the RO membrane (8), and the RO membrane (8) is installed inside the outer cylinder (7); The lower end of the outer cylinder (7) is provided with a water inlet (31), a clean water outlet (32) and a waste water outlet (33), and valve assemblies are respectively installed in the water inlet (31), the clean water outlet (32) and the waste water outlet (33); A water channel 1 (21) is formed in the central tube (11) inside the RO membrane, and the water inlet (31) is connected to the water channel 1 (21); A second water channel (22) is formed between the outer wall of the RO membrane (8) and the inner wall of the outer cylinder (7), and the purified water outlet (32) is connected to the second water channel (22); A water channel three (23) is formed between the outer wall of the RO membrane inner central tube (11) and the inner wall of the RO membrane central tube (9), and the water channel three (23) is connected to the water channel two (22).

2. The water system of the RO filter element according to claim 1, characterized in that: The lower end of the RO membrane center tube (9) is provided with an opening for facilitating the installation of the RO membrane inner center tube (11), the upper end of the RO membrane center tube (9) is formed with a baffle (93), the baffle (93) is provided with a center hole (94) matched with the water channel 1 (21), the outer periphery of the center hole (94) is provided with a plurality of water string holes 2 (92), and the outer wall of the RO membrane center tube (9) is provided with a plurality of water string holes 1 (91).

3. The water system of the RO filter element according to claim 2, characterized in that: A lower end cover (15) is fixed to the lower end of the RO membrane (8), and an upper end cover (14) is fixed to the upper end of the RO membrane (8). The upper end cover (14) is provided with a plurality of through holes (141) arranged in coordination with the second water string hole (92).

4. The water system of the RO filter element according to claim 3, characterized in that: An opening is provided at the upper end of the outer cylinder (7) for facilitating the installation of the RO membrane (8), an outer end cover (16) is detachably mounted on the opening, and a limiting assembly is provided between the outer end cover (16) and the upper end cover (14).

5. The water system of the RO filter element according to claim 4, characterized in that: The limiting assembly comprises a limiting groove (161) arranged at the center of the inner wall of the outer end cover (16) and a limiting block (142) arranged at the center of the outer wall of the upper end cover (14), wherein the limiting block (142) is arranged corresponding to the limiting groove (161).

6. The water system of the RO filter element according to claim 4, characterized in that: A decorative handle (17) is fixed to the outer side of the outer end cover (16), and a LOGO identification piece 18 is fixed to the outer side of the decorative handle (17).

7. The water system of the RO filter element according to claim 2, characterized in that: A silicone ring five (13) is sleeved on the outer wall of the lower end of the central tube (11) inside the RO membrane, and a silicone ring four (12) is sleeved on the outer wall of the upper end of the central tube (11) inside the RO membrane.

8. The water system of the RO filter element according to claim 2, characterized in that: The outer portion of the second water string hole (92) is provided with a silicone ring (10).

9. The water system of the RO filter element according to claim 3, characterized in that: A silicone ring (19) is sleeved on the outer wall of the lower end cover (15).

10. The water system of the RO filter element according to claim 2, characterized in that: The valve assembly comprises an ultrasonic cover (1), a water cut-off fitting (4) and a water cut-off member (5); a second silicone ring (6) is sleeved on the outer wall of the upper end of the water cut-off member (5); the lower end of the water cut-off member (5) is located in the water cut-off fitting (4); a spring (3) is arranged in the water cut-off fitting (4); the spring (3) is sleeved on the lower end of the water cut-off member (5); two ends of the spring (3) are respectively in contact with the water cut-off member (5) and the water cut-off fitting (4); the ultrasonic cover (1) is fixed on the outer tube (7); and a first silicone ring (2) is arranged between the ultrasonic cover (1) and the water cut-off fitting (4).

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