Filter element and water purifying device

Abstract

The utility model belongs to the technical field of water purification devices, and particularly relates to a filter element and a water purification device. The filter element comprises a filter bottle, a central pipe and a filter medium unit, the central pipe comprises an inner pipe and an outer pipe, water passing holes are formed in the outer pipe, the filter medium unit is arranged on the outer side wall of the outer pipe in a surrounding mode, and a first concentrated water passing opening and a second concentrated water passing opening are formed in the two ends of the filter medium unit respectively; a pure water channel is formed between the inner pipe and the outer pipe, and a concentrated water channel is formed inside the inner pipe; a pure water outlet, a first concentrated water outlet and a second concentrated water outlet are formed in the filter bottle, the pure water outlet is communicated with the pure water channel, the first concentrated water outlet and the first concentrated water passing opening are both communicated with the concentrated water channel, and the second concentrated water outlet is communicated with the second concentrated water passing opening. The central pipe comprises the inner pipe and the outer pipe, and a concentrated water channel formed on the inner side of the inner pipe can be added, so that a concentrated water outlet communicated with the concentrated water channel is added, the number of the concentrated water outlets is increased, and the risk that the concentrated water outlets are polluted and blocked is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification devices, in particular to a filter element and a water purification device. Background Art

[0002] With the improvement of the quality of life, people pay more and more attention to the safety of water use, and the application of filters in water filtration is also becoming increasingly widespread. A commonly used filter at present is a water purifier, such as a reverse osmosis water purifier. As an important part of the water purifier, the structure of the filter element has a great influence on the whole water purifier.

[0003] The current reverse osmosis filter element is composed of a central tube and reverse osmosis membrane sheets. After the reverse osmosis membrane sheets are folded, the edges are bonded to form a pure water bag, and then the pure water bag is wound onto the central tube to obtain the reverse osmosis filter element. Raw water enters the flow channel through one end of the reverse osmosis filter element, and the concentrated water after being filtered by the reverse osmosis membrane sheets flows out through the other end face, and the pure water in the pure water bag flows out through the central tube. This structure makes the concentrated water outlet of the filter element easily blocked, reducing the service life of the reverse osmosis filter element. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a filter element and a water purification device, which increase the number of concentrated water outlets and reduce the risk of blockage of the concentrated water outlets.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A filter element, comprising:

[0007] A filter bottle provided with a pure water outlet, a first concentrated water outlet and a second concentrated water outlet;

[0008] A central tube disposed in the filter bottle, the central tube comprising an inner tube and an outer tube, the inner tube being disposed within the outer tube, and water passing holes being provided on the tube wall of the outer tube;

[0009] A filter medium unit disposed in the filter bottle and surrounding the outer side wall of the outer tube, and a first concentrated water passage port and a second concentrated water passage port being respectively provided at both ends of the filter medium in the length direction;

[0010] A pure water passage is formed between the inner tube and the outer tube, and a concentrated water passage is formed within the inner tube; the pure water outlet is communicated with the pure water passage, the first concentrated water outlet and the first concentrated water passage port are both communicated with the concentrated water passage, and the second concentrated water outlet is communicated with the second concentrated water passage port.

[0011] As a preferred solution, the filter medium unit includes a filter medium body, a first end cap, and a second end cap. The first end cap is disposed at the top of the filter medium body along the length direction of the filter medium body, and the second end cap is disposed at the bottom of the filter medium body along the length direction of the filter medium body. The first concentrated water outlet is disposed on the first end cap, and the second concentrated water outlet is disposed on the second end cap.

[0012] As a preferred solution, there is a first flow gap between the first end cap and the top wall of the filter bottle. The concentrated water flowing out through the first concentrated water outlet flows through the first flow gap to the concentrated water channel.

[0013] As a preferred solution, the upper end of the inner tube penetrates through the first end cap, and a communication port is provided at a portion of the inner tube located between the first end cap and the top wall of the filter bottle; or

[0014] A first annular boss is provided on the first end cap. The first annular boss is communicated with the inner tube, and a communication port is provided on the first annular boss;

[0015] The first flow gap is communicated with the concentrated water channel through the communication port.

[0016] As a preferred solution, a second annular boss is provided on the second end cap, and a third annular boss is provided on the bottom wall of the filter bottle. The second annular boss is sealingly inserted into the third annular boss, and a second flow gap is formed between the outer side wall of the third annular boss and the inner wall of the filter bottle;

[0017] An inlet is further provided on the filter bottle. A raw water channel is formed between the inner wall of the filter bottle and the filter medium unit. The inlet and the raw water channel are both communicated with the second flow gap.

[0018] As a preferred solution, a fourth annular boss is provided on the bottom wall of the filter bottle. The fourth annular boss is located inside the third annular boss, and the fourth annular boss abuts against the end of the filter medium unit;

[0019] The inner tube extends into the fourth annular boss, and a third flow gap is formed between the outer side wall of the inner tube and the inner side wall of the fourth annular boss. The pure water outlet and the pure water channel are both communicated with the third flow gap.

[0020] As a preferred solution, a fourth flow gap is formed between the outer side wall of the fourth annular boss and the inner side wall of the third annular boss. The second concentrated water outlet and the second concentrated water outlet are both communicated with the fourth flow gap.

[0021] As a preferred solution, a fifth annular boss is provided on the bottom wall of the filter bottle. The fifth annular boss is located inside the fourth annular boss. The lower end of the inner tube is hermetically inserted into the fifth annular boss, and the first concentrated water outlet is communicated with the fifth annular boss.

[0022] As a preferred solution, the filter medium body includes a spiral reverse osmosis membrane provided on the outer side of the outer tube and a waterproof membrane provided on the outer side of the spiral reverse osmosis membrane. Water inlet holes are provided on the waterproof membrane.

[0023] A water purification device includes a main body and a filter element as described in any of the above solutions. The filter element is provided inside the main body.

[0024] Advantages of the present utility model:

[0025] The present utility model provides a filter element. By setting the central tube to include an inner tube and an outer tube, a concentrated water channel formed inside the inner tube can be added, thereby increasing a concentrated water outlet communicated with the concentrated water channel, further increasing the number of concentrated water outlets, and reducing the risk of blockage of the concentrated water outlets. Description of the drawings

[0026] Figure 1 is a cross-sectional view of the filter element provided by the embodiment of the present utility model along the first direction;

[0027] Figure 2 is a cross-sectional view of the filter element provided by the embodiment of the present utility model along the second direction.

[0028] In the figure:

[0029] 1, raw water channel; 2, pure water channel; 3, concentrated water channel;

[0030] 10, filter bottle; 11, bottle body; 12, top cover; 121, positioning groove; 13, bottom cover; 131, water inlet; 132, pure water outlet; 133, first concentrated water outlet; 134, second concentrated water outlet; 135, third annular boss; 136, fourth annular boss; 137, fifth annular boss; 20, central tube; 21, inner tube; 22, outer tube; 31, filter medium body; 32, first end cover; 321, first concentrated water through port; 322, first annular boss; 3221, communication port; 33, second end cover; 331, second concentrated water through port; 332, second annular boss; 41, first seal; 42, second seal. Detailed implementation manners

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "on the top" of the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and to the left", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] Such as Figure 1 and Figure 2As shown in the figure, an embodiment of the present utility model provides a filter element, which includes a filter bottle 10, a central tube 20, and a filter medium unit. Among them, the central tube 20 and the filter medium unit are both arranged inside the filter bottle 10. The central tube 20 includes an inner tube 21 and an outer tube 22. The inner tube 21 is arranged inside the outer tube 22. Water passing holes are provided on the tube wall of the outer tube 22. The filter medium unit is arranged around the outer side wall of the outer tube 22. First concentrated water outlets 321 and second concentrated water outlets 331 are respectively arranged at both ends of the filter medium unit along the length direction; a raw water channel 1 is formed between the inner wall of the filter bottle 10 and the filter medium unit, a pure water channel 2 is formed between the outer side wall of the inner tube 21 and the inner wall side of the outer tube 22, and a concentrated water channel 3 is formed inside the inner tube 21; an inlet 131, a pure water outlet 132, a first concentrated water outlet 133, and a second concentrated water outlet 134 are arranged on the filter bottle 10. The inlet 131 is communicated with the raw water channel 1, the pure water outlet 132 is communicated with the pure water channel 2, both the first concentrated water outlet 133 and the first concentrated water outlet 321 are communicated with the concentrated water channel 3, and the second concentrated water outlet 134 is communicated with the second concentrated water outlet 331.

[0036] Raw water enters the raw water channel 1 through the inlet 131. The raw water in the raw water channel 1 flows through the filter medium unit. The pure water that flows through the filter medium unit and penetrates the filter medium unit flows into the pure water channel 2 between the outer tube 22 and the inner tube 21 through the water passing holes on the outer tube 22. The pure water in the pure water channel 2 flows out of the filter element through the pure water outlet 132. In addition, the water that flows through the filter medium unit but does not penetrate the filter medium unit forms concentrated water. A part of the concentrated water flows into the concentrated water channel 3 through the first concentrated water outlet 321, and the concentrated water in the concentrated water channel 3 flows out of the filter element through the first concentrated water outlet 133; another part of the concentrated water flows to the second concentrated water outlet 134 through the second concentrated water outlet 331 and flows out of the filter element through the second concentrated water outlet 134.

[0037] By setting the central tube 20 to include the inner tube 21 and the outer tube 22, a concentrated water channel 3 formed inside the inner tube 21 can be increased, thereby increasing a concentrated water outlet communicated with the concentrated water channel 3, further increasing the number of concentrated water outlets, and reducing the risk of blockage of the concentrated water outlet.

[0038] Specifically, the filter bottle 10 includes a bottle body 11, a top cover 12, and a bottom cover 13. In this embodiment, the top cover 12 is detachably and sealingly attached to the upper end of the bottle body 11, and the bottle body 11 and the bottom cover 13 are integrally formed. However, it is not limited thereto. In other embodiments, the bottom cover 13 may be detachably or non-detachably and sealingly attached to the lower end of the bottle body 11. In other embodiments, the top cover 12 may be integrally formed with the bottle body 11, and the bottom cover 13 is detachably and sealingly attached to the lower end of the bottle body 11. Through the above-mentioned detachable connection among the bottle body 11, the top cover 12, and the bottom cover 13, the components (such as the filter medium unit, each component of the central tube 20, etc.) placed in the filter bottle 10 can be replaced, repaired, etc. as needed, so that the filter element does not need to be replaced as a whole, the service life of the filter element is extended, and the cost is further reduced.

[0039] The water inlet 131, the pure water outlet 132, the first concentrated water outlet 133, and the second concentrated water outlet 134 are all located on the same side of the filter bottle 10. In this embodiment, the water inlet 131, the pure water outlet 132, the first concentrated water outlet 133, and the second concentrated water outlet 134 are all located on the bottom cover 13 of the filter bottle 10.

[0040] The filter medium unit includes a filter medium body 31, a first end cover 32, and a second end cover 33. The first end cover 32 is disposed at the top end of the filter medium body 31 along the length direction of the filter medium body 31, and the second end cover 33 is disposed at the bottom end of the filter medium body 31 along the length direction of the filter medium body 31, that is, the first end cover 32 and the top cover 12 of the filter bottle 10 are on the same side, and the second end cover 33 and the bottom cover 13 of the filter bottle 10 are on the same side. The first concentrated water passage 321 is disposed on the first end cover 32, and the second concentrated water passage 331 is disposed on the second end cover 33. The filter medium unit may be a reverse osmosis membrane, nanofiltration, or other filter media suitable for the structure of this filter element.

[0041] It should be noted that the outer diameter of the second end cover 33 is slightly smaller than the inner diameter of the filter bottle 10, so that there is a gap between the second end cover 33 and the inner wall of the filter bottle 10, and this gap is part of the raw water passage 1. The outer diameter of the first end cover 32 is basically equal to the inner diameter of the filter bottle 10, so that there is no gap between the first end cover 32 and the inner wall of the filter bottle 10, and thus the raw water will not flow to the area between the first end cover 32 and the top cover 12.

[0042] Optionally, the filter medium body 31 includes a spiral reverse osmosis membrane disposed outside the outer tube 22 and a waterproof membrane disposed outside the spiral reverse osmosis membrane. The waterproof membrane is provided with water inlet holes which are communicated with the flow channels in the spiral reverse osmosis membrane. After the raw water enters the raw water channel 1 through the water inlet 131, the raw water in the raw water channel 1 can enter the filter medium unit through the water inlet holes. Alternatively, optionally, an inlet gap is formed between the filter medium body 31 and the second end cap 33. For example, a convex structure is provided on the second end cap 33, and the convex structure abuts against the filter medium body 31, so that an inlet gap is formed between the filter medium body 31 and the second end cap 33, and the raw water in the raw water channel 1 can enter the filter medium unit through this inlet gap.

[0043] There is a first flow gap between the first end cap 32 and the top wall of the filter bottle 10, and the concentrated water flowing out through the first concentrated water outlet 321 flows through the first flow gap to the concentrated water channel 3.

[0044] In this embodiment, a first annular boss 322 is provided on the first end cap 32. The first annular boss 322 is coaxially and communicatively arranged with the inner tube 21. A communication port 3221 is provided on the first annular boss 322, and the first flow gap is communicated with the concentrated water channel 3 through the communication port 3221. Or in an alternative embodiment, the upper end of the inner tube 21 penetrates through the first end cap 32, and a communication port 3221 is provided on the part of the inner tube 21 between the first end cap 32 and the top wall of the filter bottle 10. The first flow gap is communicated with the concentrated water channel 3 through the communication port 3221. A part of the concentrated water flows into the first flow gap through the first concentrated water outlet 321, then flows into the concentrated water channel 3 through the communication port 3221, and finally flows out of the filter element through the first concentrated water outlet 133, referring to Figure 2 the arrow indication in

[0045] Optionally, a positioning groove 121 is provided on the top cover 12, and the end of the first annular boss 322 or the end of the inner tube 21 is located in the positioning groove 121 to facilitate the positioning of the first annular boss 322 or the inner tube 21.

[0046] In this embodiment, a second annular boss 332 is provided on the second end cap 33, and a third annular boss 135 is provided on the bottom cover 13. The second annular boss 332 is sealingly inserted into the third annular boss 135, so as to facilitate the positioning between the filter medium unit and the bottom cover 13. Optionally, a first sealing member 41 is provided between the outer side wall of the second annular boss 332 and the inner side wall of the third annular boss 135. A second flow gap is formed between the outer side wall of the third annular boss 135 and the inner wall of the filter bottle 10. The water inlet 131 and the raw water channel 1 are both communicated with this second flow gap. After the raw water enters the filter bottle 10 through the water inlet 131, it enters the raw water channel 1 through the second flow gap, referring to Figure 1 the arrow indication in

[0047] In this embodiment, a fourth annular boss 136 is further provided on the bottom cover 13. The fourth annular boss 136 is located inside the third annular boss 135. The fourth annular boss 136 abuts against the lower end of the filter medium unit to support the filter medium unit. The fourth annular boss 136 is coaxially communicated with the outer tube 22. Optionally, the end of the outer tube 22 is flush with the second end cover 33, and the two can be an integrally formed structure. Alternatively, the outer tube 22 can also penetrate through the second end cover 32 and be inserted into the fourth annular boss 136.

[0048] The inner tube 21 extends into the fourth annular boss 136. A third flow gap is formed between the outer side wall of the inner tube 21 and the inner side wall of the fourth annular boss 136. Both the pure water outlet 132 and the pure water channel 2 are communicated with the third flow gap. The pure water in the pure water channel 2 flows into the second flow gap and flows out of the filter element through the pure water outlet 132, referring to Figure 2 the arrow indication in

[0049] A fourth flow gap is formed between the outer side wall of the fourth annular boss 136 and the inner side wall of the third annular boss 135. Both the second concentrated water through port 331 and the second concentrated water outlet 134 are communicated with the fourth flow gap. A part of the concentrated water flows into the fourth flow gap through the second concentrated water through port 331 and then flows out of the filter element through the second concentrated water outlet 134, referring to Figure 2 the arrow indication in

[0050] In this embodiment, a fifth annular boss 137 is further provided on the bottom cover 13. The fifth annular boss 137 is located inside the fourth annular boss 136. The lower end of the inner tube 21 is hermetically inserted into the fifth annular boss 137, so as to facilitate the positioning between the central tube 20 and the bottom cover 13. The first concentrated water outlet 133 is communicated with the fifth annular boss 137. Optionally, a second sealing member 42 is provided between the inner tube 21 and the fifth annular boss 137. The concentrated water in the concentrated water channel 3 flows into the fifth annular boss 137 and then flows out of the filter element through the first concentrated water outlet 133, referring to Figure 2 the arrow indication in

[0051] The embodiment of the present utility model further provides a water purification device, which includes a main body and the filter element as described above. The filter element is arranged inside the main body. The main body is provided with a water inlet port, a water outlet port, a first drainage port and a second drainage port. The water inlet port is communicated with the water inlet 131, the water outlet port is communicated with the pure water outlet 132, the first drainage port is communicated with the first concentrated water outlet 133, and the second drainage port is communicated with the second concentrated water outlet 134. By arranging the above filter element, the risk of blockage of the drainage port can be reduced, and the pure water output can be increased.

[0052] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Filter element, characterized in that, Comprising: A filter bottle (10) provided with a pure water outlet (132), a first concentrated water outlet (133) and a second concentrated water outlet (134); A central tube (20) disposed within the filter bottle (10), the central tube (20) including an inner tube (21) and an outer tube (22), the inner tube (21) being disposed within the outer tube (22), and water passing holes being provided on the tube wall of the outer tube (22); A filter medium unit disposed within the filter bottle (10) and circumferentially disposed on the outer side wall of the outer tube (22), first concentrated water passing ports (321) and second concentrated water passing ports (331) being respectively provided at both ends of the filter medium in the length direction; A pure water channel (2) is formed between the inner tube (21) and the outer tube (22), and a concentrated water channel (3) is formed within the inner tube (21); the pure water outlet (132) is communicated with the pure water channel (2), both the first concentrated water outlet (133) and the first concentrated water passing port (321) are communicated with the concentrated water channel (3), and the second concentrated water outlet (134) is communicated with the second concentrated water passing port (331).

2. The filter element according to claim 1, wherein The filter medium unit includes a filter medium body (31), a first end cap (32) and a second end cap (33), the first end cap (32) being disposed at the top end of the filter medium body (31) along the length direction of the filter medium body (31), the second end cap (33) being disposed at the bottom end of the filter medium body (31) along the length direction of the filter medium body (31), the first concentrated water passing port (321) being provided on the first end cap (32), and the second concentrated water passing port (331) being provided on the second end cap (33).

3. The filter element according to claim 2, wherein A first flow gap is provided between the first end cap (32) and the top wall of the filter bottle (10), and the concentrated water flowing out through the first concentrated water passing port (321) flows through the first flow gap to the concentrated water channel (3).

4. The filter element according to claim 3, wherein The upper end of the inner tube (21) penetrates through the first end cap (32), and a communication port (3221) is provided on the part of the inner tube (21) between the first end cap (32) and the top wall of the filter bottle (10); or A first annular boss (322) is provided on the first end cap (32), the first annular boss (322) is communicated with the inner tube (21), and a communication port (3221) is provided on the first annular boss (322); The first flow gap is communicated with the concentrated water channel (3) through the communication port (3221).

5. The filter element according to claim 2, wherein, A second annular boss (332) is provided on the second end cap (33), a third annular boss (135) is provided on the bottom wall of the filter bottle (10), the second annular boss (332) is sealingly inserted into the third annular boss (135), and a second flow gap is formed between the outer side wall of the third annular boss (135) and the inner wall of the filter bottle (10); The filter bottle (10) is further provided with a water inlet (131). A raw water channel (1) is formed between the inner wall of the filter bottle (10) and the filter medium unit. Both the water inlet (131) and the raw water channel (1) are communicated with the second flow gap.

6. The filter element according to claim 5, characterized in that, The bottom wall of the filter bottle (10) is provided with a fourth annular boss (136). The fourth annular boss (136) is located inside the third annular boss (135), and the fourth annular boss (136) abuts against the end of the filter medium unit. The inner tube (21) extends into the fourth annular boss (136). A third flow gap is formed between the outer side wall of the inner tube (21) and the inner side wall of the fourth annular boss (136). Both the pure water outlet (132) and the pure water channel (2) are communicated with the third flow gap.

7. The filter element according to claim 6, characterized in that, A fourth flow gap is formed between the outer side wall of the fourth annular boss (136) and the inner side wall of the third annular boss (135). Both the second concentrated water through port (331) and the second concentrated water outlet (134) are communicated with the fourth flow gap.

8. The filter element according to claim 6, wherein The bottom wall of the filter bottle (10) is provided with a fifth annular boss (137). The fifth annular boss (137) is located inside the fourth annular boss (136). The lower end of the inner tube (21) is hermetically inserted into the fifth annular boss (137), and the first concentrated water outlet (133) is communicated with the fifth annular boss (137).

9. The filter element according to claim 2, wherein, The filter medium body (31) includes a spiral reverse osmosis membrane disposed outside the outer tube (22) and a waterproof membrane disposed outside the spiral reverse osmosis membrane. The waterproof membrane is provided with water inlet holes.

10. Water purification device, characterized in that, It includes the main machine and the filter element according to any one of claims 1-9. The filter element is disposed inside the main machine.

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