Reverse osmosis filter element assembly and filter device

Abstract

The invention discloses a reverse osmosis filter element assembly and a filtering device, and the reverse osmosis filter element assembly comprises a reverse osmosis membrane filter element which adopts a reverse osmosis technology to obtain pure water; the reverse osmosis membrane filter element is sleeved with the water collecting pipe, a plurality of water collecting holes are formed in the water collecting pipe, pure water filtered by the reverse osmosis membrane filter element is collected into the water collecting pipe through the water collecting holes, and a pure water outlet is formed in the side end of the water collecting pipe; the central pipe is sleeved in the water collecting pipe and is used as a water inlet channel of raw water; the upper end cover is arranged at the upper end of the reverse osmosis membrane filter element in a sleeving mode and attached to the water collecting pipe, a pure water channel is formed in the position, corresponding to the pure water outlet of the water collecting pipe, of the upper end cover, and filtered pure water is collected into a cavity formed by the filter element assembly and the shell of the filtering device through the pure water outlet in the side end and the pure water channel. The reverse osmosis filter element assembly effectively solves the problem that the TDS value of water in the water purifier head cup is increased.

Description

Technical Field

[0001] The invention belongs to the field of filtering devices, and in particular relates to a reverse osmosis filter element component and a filtering device. Background Art

[0002] As the public pursues a better quality of life, water quality has begun to attract much attention. Water purification equipment with reverse osmosis function is becoming more and more popular because the purified water it produces is fresher, more hygienic and safer. The reverse osmosis technology used in water purifiers is a technology that uses an artificial semipermeable membrane to achieve ultra-high precision filtration. The pore size of this semipermeable membrane is extremely small, only between 0.5 and 10nm. Under normal circumstances, water cannot pass through. Only by pressurizing the water on one side of the membrane can reverse osmosis be achieved to obtain water of higher purity. Water with a concentration that cannot be penetrated will be discharged as wastewater, and the reverse osmosis water purifier needs to be plugged in to provide power for the internal booster pump. Therefore, the raw water filtered by reverse osmosis technology can obtain pure water with a TDS that meets the direct drinking water standard.

[0003] However, when the water purification equipment is shut down for a long time and then restarted, the TDS of the first cup of pure water is high, resulting in low quality of the first cup of pure water, and the water quality cannot meet the needs of users. This is because there is an osmotic pressure difference between concentrated water and pure water. When the reverse osmosis water purifier is working, the booster pump will apply a pressure greater than the osmotic pressure to the raw water end, resulting in reverse osmosis. When the reverse osmosis water purifier stops working, this pressure will also disappear. At this time, there is still a solution in the reverse osmosis membrane shell. The initial state is that there is concentrated water in front of the membrane and pure water behind the membrane. However, in the absence of external pressure, as time goes by, the osmotic pressure difference is restored, and a two-way osmosis phenomenon will occur, that is, pure water penetrates into the concentrated water side, and concentrated water penetrates into the pure water side, until the two sides reach equilibrium, and at this time, the TDS value in the pure water cavity will increase.

[0004] Based on this, a new type of reverse osmosis filter element component is urgently needed to reduce the problem of high TDS value of the first cup of water. Summary of the invention

[0005] Purpose of the invention: The technical problem to be solved by the present invention is to provide a new type of reverse osmosis filter element assembly to reduce the problem of high TDS value of the first cup of water.

[0006] Technical solution: The reverse osmosis filter element assembly of the present invention comprises:

[0007] Reverse osmosis membrane filter element, using reverse osmosis technology to obtain pure water;

[0008] The water collecting pipe is sleeved on the reverse osmosis membrane filter element, and a plurality of water collecting holes are opened on the water collecting pipe. The pure water filtered by the reverse osmosis membrane filter element is collected into the water collecting pipe through the plurality of water collecting holes. A pure water outlet is opened at the side end of the water collecting pipe.

[0009] The central pipe is installed in the water collecting pipe and serves as the water inlet channel for raw water;

[0010] The upper end cover is sleeved on the upper end of the reverse osmosis membrane filter element and is fitted with the water collecting pipe. A pure water channel is opened on it corresponding to the pure water outlet of the water collecting pipe, so that the filtered pure water is collected into the cavity formed by the filter element assembly and the shell of the filter device through the pure water outlet at the side end and the pure water channel.

[0011] Furthermore, a sealing ring is provided at the pure water outlet of the water collecting pipe of the filter element assembly to form a sealed connection between the pure water outlet and the pure water channel opened on the upper end cover.

[0012] Furthermore, the top of the upper end cover of the filter element assembly and the cavity formed by the central tube and the water collecting pipe constitute a wastewater cavity, and the port of the upper end cover is the corresponding wastewater outlet.

[0013] Furthermore, a wastewater flow channel is formed between the upper end cover of the filter element assembly and the upper end of the reverse osmosis membrane filter element. A plurality of guide grooves are provided on the reverse osmosis membrane filter element, and the lower end of the guide groove is connected to the wastewater flow channel to guide the filtered wastewater through the guide groove into the wastewater cavity for discharge.

[0014] Furthermore, the filter element assembly forms a sealed connection between the outer side of the central tube at the upper end of the pure water outlet and the inner side of the water collecting pipe.

[0015] Furthermore, the central tube of the filter element assembly is fixedly connected to the inner wall of the water collecting pipe through a connecting plate extending from the outer wall of the central tube.

[0016] Furthermore, a sealed connection is formed between the outer side of the lower end of the central tube of the filter element assembly and the inner side of the water collecting pipe, so that a pure water collecting cavity is formed through the sealed connection between the upper and lower ends.

[0017] Furthermore, the filter element assembly also includes a lower end cover arranged at the bottom end of the reverse osmosis membrane filter element, and a raw water cavity is formed between the two. The lower end of the water collecting pipe is provided with a channel for the raw water in the central pipe to flow into the raw water cavity.

[0018] A filtering device comprises a shell and the above-mentioned reverse osmosis filter element assembly, wherein the reverse osmosis filter element assembly is located in the shell and a cavity is formed between the two for accommodating pure water flowing out of the pure water outlet at the side end of a water collecting pipe, and the top end of the shell is provided with a raw water inlet corresponding to the central pipe, a waste water outlet corresponding to the port of the upper end cover, and a pure water outlet communicated with the cavity.

[0019] Beneficial effect: Compared with the prior art, the significant advantages of the present invention are: the reverse osmosis filter element assembly sets a central tube in the water collecting pipe as the raw water inlet channel, and opens a pure water outlet at the side end of the water collecting pipe, and a corresponding pure water channel is set on the upper end cover to collect the filtered pure water into the cavity formed by the outer shell of the filter device and the filter element assembly, that is, the volume of the actual pure water holding cavity is increased by the side outlet of the pure water, and even if the TDS value of the pure water in the water collecting pipe increases due to the two-way penetration caused by the shutdown of the water purifier, it will not affect the overall TDS value of the pure water in the large-capacity cavity, so that the difference in the TDS value of the pure water filtered in the final filter device is only ±10PPM, which effectively solves the pain point problem of increased TDS value of the first cup of water in the water purifier field. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the filter element assembly of the present invention;

[0021] Figure 2 A cross-sectional view of the filter element assembly of the present invention Figure 1 ;

[0022] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0023] Figure 4 A cross-sectional view of the filter element assembly of the present invention Figure 2 ;

[0024] Figure 5 for Figure 4 Enlarged view of middle part B;

[0025] Figure 6 for Figure 4 Enlarged view of middle C;

[0026] Figure 7 It is a structural schematic diagram of the water collecting pipe of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the central tube of the present invention;

[0028] Fig. 9 It is a schematic diagram of the water flow direction of the filter element assembly of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1As shown, the reverse osmosis filter element assembly of the present invention comprises a reverse osmosis membrane filter element 1, a water collecting pipe 2 which is sleeved in the reverse osmosis membrane filter element 1 and has a plurality of water collecting holes 3, a central pipe 5 which is sleeved in the water collecting pipe 2, an upper end cover 6 and a lower end cover 13 which are respectively arranged at the upper end and the lower end of the reverse osmosis membrane filter element 1, and sealant or sealing tape can be further added to the upper end cover 6 and the lower end cover 13 of the reverse osmosis filter element assembly to improve the sealing performance of the overall filter element assembly.

[0031] like Figures 2 to 6 As shown, the central tube 5 of the reverse osmosis filter element assembly of the present invention serves as the water inlet channel of the raw water, that is, driven by the water pump, after the raw water enters through the central tube 5, it flows upward through the reverse osmosis membrane filter element 1 at the bottom end of the lower end cover 13 and reverse osms, and then flows from the water collection hole 3 to the water collection pipe 2 for collection. A raw water cavity 14 is formed between the bottom end of the reverse osmosis membrane filter element 1 and the lower end cover 13, and a hole 15 is opened on the corresponding water collection pipe 2, so that the raw water in the central tube 5 enters the raw water cavity 14 through the hole 15, and obtains pure water after being filtered by the reverse osmosis membrane filter element.

[0032] like Figure 7 As shown, a pure water outlet 4 is provided at the side end of the water collecting pipe 2. The pure water outlet 4 can be two, symmetrically arranged on the left and right, or flexibly opened according to actual needs. The upper end cover 6 is arranged to fit the water collecting pipe 2. A pure water channel 7 connected to the pure water outlet 4 on the upper end cover 6 corresponding to the side end of the water collecting pipe 2 is provided. A sealing ring is also provided at the connection between the water collecting pipe 2 and the pure water channel 7 to improve the sealing of the connection between the two. The present invention opens a pure water outlet 4 at the side end of the water collecting pipe 2 and correspondingly provides a pure water channel 7 on the upper end cover 6, so that the pure water collected from the water collecting pipe 2 flows through the pure water outlet 4 and the pure water channel 7 to the cavity formed by the filter element assembly and the housing of the filter device, thereby increasing the water capacity volume of the pure water of the filter device of the present invention.

[0033] The sealing performance of the center tube 5 and the water collecting pipe 2 is improved by setting a sealing ring 16 at the upper end of the pure water outlet 4 at the side end of the water collecting pipe 2, so as to promote the pure water in the water collecting pipe 2 to flow out through the pure water outlet 4 and the pure water channel 7 at the side end of the water collecting pipe 2, and then be collected in the cavity formed by the filter element assembly and the shell of the filter device. The lower ends of the center tube 5 and the water collecting pipe 2 are also provided with a sealing ring 16 for sealing connection. The sealing ring 16 is set so that a pure water collection cavity 12 is formed in the water collecting pipe 2. The center tube 5 is fixed to the inner wall of the water collecting pipe 2 through the connecting plate 11 extending from its outer wall, as shown in FIG. Figure 8 As shown, the connection plate 11 may be disposed above the sealing ring 16 at the upper ends of both the central pipe 5 and the water collecting pipe 2 .

[0034] A wastewater flow channel 9 is formed between the upper end cover 6 of the present invention and the upper end of the reverse osmosis membrane filter element 1. That is, the raw water enters through the lower end of the reverse osmosis membrane filter element 1 and the wastewater filtered after reverse osmosis flows out through the wastewater flow channel 9. The water collecting pipe 2 is provided with a guide groove 10 for guiding the discharge of the wastewater. Similarly, two guide grooves 10 can be provided, which are respectively located on both sides of the reverse osmosis membrane filter element 1 and form a cross-shaped arrangement with the pure water outlets 4 on both sides. The bottom end of the guide groove 10 is connected to the wastewater flow channel 9, and the top end of the guide groove 10 is connected to the wastewater cavity 8 formed by the upper end cover 6, the water collecting pipe 2 and the central pipe 5. And the port of the wastewater cavity 8 is the wastewater port, which is connected to the wastewater interface on the outer shell of the filtering device.

[0035] The filtering device formed by the reverse osmosis filter element assembly of the present invention also includes a housing for accommodating the reverse osmosis filter element assembly, and a cavity is formed between the two for accommodating the pure water flowing out of the pure water outlet 4 at the side end of the water collecting pipe 2. The top of the housing is provided with a raw water inlet corresponding to the central pipe 5, a waste water outlet corresponding to the port of the upper end cover 6, and a pure water outlet connected to the cavity.

[0036] like Fig. 9 As shown, the water flow direction of the reverse osmosis filter element assembly of the present invention is that the raw water flows in through the water inlet channel of the central tube 2 under the pressure of the water pump, circulates from the bottom to the top of the reverse osmosis membrane filter element 1, and the pure water obtained by the reverse osmosis action of the reverse osmosis membrane filter element 1 is collected in the water collecting pipe and flows through the pure water outlet at the side end of the water collecting pipe and the pure water flow channel on the upper end cover to the housing of the filtration device and the cavity of the reverse osmosis filter element assembly for storage. The filtered wastewater is discharged from the wastewater cavity at the top of the upper end cover through the wastewater flow channel formed by the upper end cover and the reverse osmosis membrane filter element 1 under the guidance of the guide groove on the water collecting pipe. That is, the reverse osmosis filter element assembly of the present invention sets a central tube in the water collecting pipe as the raw water inlet channel, and opens a pure water outlet at the side end of the water collecting pipe, and correspondingly sets a pure water channel on the upper end cover to collect the filtered pure water into the cavity formed by the housing of the filter device and the filter element assembly, that is, the volume of the actual pure water volume is increased by the side outlet of the pure water, and even if the TDS value of the pure water in the water collecting pipe increases due to the two-way penetration caused by the shutdown of the water purifier, it will not affect the overall TDS value of the pure water in the large-capacity cavity, so that the difference in the TDS value of the pure water filtered in the final filter device is only ±10PPM, which effectively solves the pain point of the increase in the TDS value of the first cup of water in the water purifier field. In addition, by setting the wastewater outlet, pure water outlet and raw water outlet to the same end, the convenience of subsequent compounding of other functional filter elements is improved.

Claims

1. A reverse osmosis filter element assembly, characterized in that: The filter element assembly includes: A reverse osmosis membrane filter element (1) uses reverse osmosis technology to obtain pure water; A water collecting pipe (2) is sleeved on the reverse osmosis membrane filter element (1) and is provided with a plurality of water collecting holes (3). Pure water filtered by the reverse osmosis membrane filter element (1) is collected into the water collecting pipe (2) through the plurality of water collecting holes (3). A pure water outlet (4) is provided at a side end of the water collecting pipe (2); The central pipe (5) is sleeved inside the water collecting pipe (2) and serves as a water inlet channel for raw water; An upper end cover (6) is sleeved on the upper end of the reverse osmosis membrane filter element (1) and is arranged in close contact with the water collecting pipe (2). A pure water channel (7) is provided on the upper end cover corresponding to the pure water outlet (4) of the water collecting pipe (2) so that the filtered pure water can be collected into a cavity formed by the filter element assembly and the housing of the filter device through the pure water outlet (4) at the side end and the pure water channel (7).

2. The reverse osmosis filter element assembly according to claim 1, characterized in that: A sealing ring is provided at the pure water outlet (4) of the water collecting pipe (2) to form a sealed connection between the pure water outlet (4) and the pure water channel (7) opened on the upper end cover (6).

3. The reverse osmosis filter element assembly according to claim 1, characterized in that: The top end of the upper end cover (6) and the cavity formed by the central pipe (5) and the water collecting pipe (2) constitute a wastewater cavity (8), and the port of the upper end cover (6) is the corresponding wastewater outlet.

4. The reverse osmosis filter element assembly according to claim 3, characterized in that: A wastewater flow channel (9) is formed between the upper end cover (6) and the upper end of the reverse osmosis membrane filter element (1), and a plurality of guide grooves (10) are provided on the reverse osmosis membrane filter element (1), and the lower ends of the guide grooves (10) are connected to the wastewater flow channel (9) so that the filtered wastewater is guided through the guide grooves (10) to be discharged into the wastewater cavity (8).

5. The reverse osmosis filter element assembly according to claim 1, characterized in that: A sealed connection is formed between the outer side of the central tube (5) located at the upper end of the pure water outlet (4) and the inner side of the water collecting pipe (2).

6. The reverse osmosis filter element assembly according to claim 1, characterized in that: The central tube (5) is fixedly connected to the inner wall of the water collecting pipe (2) via a connecting plate (11) extending from the outer wall of the central tube (5).

7. The reverse osmosis filter element assembly according to claim 5, characterized in that: A sealed connection is formed between the outer side of the lower end of the central tube (5) and the inner side of the water collecting pipe (2), so that a pure water collecting cavity (12) is formed through the sealed connection between the upper and lower ends.

8. The reverse osmosis filter element assembly according to claim 1, characterized in that: The filter element assembly also includes a lower end cover (13) arranged at the bottom end of the reverse osmosis membrane filter element (1), and a raw water cavity (14) is formed between the two. The lower end of the water collecting pipe (2) is provided with a channel (15) for allowing the raw water in the central pipe (5) to flow into the raw water cavity (14).

9. A filtering device, characterized in that: The filtering device comprises a shell and the reverse osmosis filter element assembly as claimed in claim 1, wherein the reverse osmosis filter element assembly is located in the shell, and a cavity is formed between the two for accommodating pure water flowing out of the pure water outlet at the side end of the water collecting pipe (2), and the top end of the shell is provided with a raw water inlet corresponding to the central pipe (5), a waste water outlet corresponding to the port of the upper end cover (6), and a pure water outlet connected to the cavity.

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