Composite filter element and water purifying device

Abstract

The utility model belongs to water treatment technical field discloses a kind of composite filter element and water purifying device, including shell, first filter assembly and second filter assembly are arranged in shell interior, first filter assembly is sleeved in the outer wall surface of second filter assembly, the outer wall surface of second filter assembly is not water, to form the first water passage between the outer wall surface of first filter assembly and the inner wall surface of shell, and the second water passage is formed between the inner wall surface of first filter assembly and the outer wall surface of second filter assembly;First filter assembly's outer wall surface is also equipped with first sealing element, first sealing element separates first water passage into front water inlet cavity and front water outlet cavity;First filter assembly further includes first front filter element and second front filter element, first front filter element is respectively communicated with front water inlet cavity, second water passage, second front filter element is respectively communicated with second water passage, front water outlet cavity.The utility model is favorable to reduce the volume of complete machine, save installation space, and filtering effect is better.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a composite filter element and a water purification device. Background Technology

[0002] With the improvement of living standards, people are paying more and more attention to water quality and hygiene, and equipping households with water purification devices has become a common trend. Water purification devices can effectively remove impurities and bacteria from water through filtration and other methods, conveniently producing pure water that can be drunk directly, providing a strong guarantee for people's healthy drinking water.

[0003] However, existing water purifiers typically use multiple filter cartridges to ensure effective filtration. However, each filter cartridge is usually separate and independent, resulting in a less compact layout and lower integration between the multiple filter cartridges. This leads to a larger overall size of the water purifier, which takes up more space when installed in a home. Furthermore, the separate layout of the multiple filter cartridges results in a short and direct flow path for water between each filter cartridge, making it difficult to fully utilize the filtration efficiency of each filter cartridge.

[0004] Therefore, there is an urgent need to propose a composite filter element and water purification device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a composite filter element and water purification device, which helps to reduce the overall size of the machine, save installation space, and at the same time improve the filtration effect.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a composite filter element, including a housing, on which an inlet, a first outlet, and a second outlet are provided;

[0008] The housing is provided with a first filter component and a second filter component. The first filter component is sleeved on the outer wall of the second filter component. The outer wall of the second filter component is not permeable to water, so that a first water passage is formed between the outer wall of the first filter component and the inner wall of the housing, and a second water passage is formed between the inner wall of the first filter component and the outer wall of the second filter component.

[0009] The outer wall of the first filter assembly is also provided with a first sealing element, which divides the first water passage into a front water inlet chamber and a front water outlet chamber.

[0010] The first filtration assembly further includes a first pre-filter and a second pre-filter. The first pre-filter is connected to the pre-inlet chamber and the second water passage, respectively, and the second pre-filter is connected to the second water passage and the pre-outlet chamber, respectively.

[0011] The water flow direction in the second pre-filter is opposite to that in the first pre-filter.

[0012] In some embodiments, a mounting base is provided between the first pre-filter and the second pre-filter, both of which are connected to the mounting base, and the mounting base is connected to the inner wall of the housing.

[0013] In some embodiments, the mounting base includes an annular connecting portion, a first limiting portion, and a second limiting portion. The bottom surface of the first pre-filter element is connected to the upper end surface of the annular connecting portion, and the top surface of the second pre-filter element is connected to the lower end surface of the annular connecting portion. The radially outer side of the annular connecting portion is connected to the inner wall of the housing. The first limiting portion and the second limiting portion are both connected to the annular connecting portion and extend in opposite directions along the axial direction of the composite filter element. A portion of the outer peripheral surface of the first pre-filter element abuts against the inner wall of the first limiting portion, and a portion of the outer peripheral surface of the second pre-filter element abuts against the inner wall of the second limiting portion.

[0014] In some embodiments, the first sealing member is sleeved and connected to the outer peripheral surface of the annular connection portion, and the first sealing member abuts against the inner wall of the housing to achieve a sealed connection between the mounting base and the inner wall of the housing.

[0015] In some embodiments, the first pre-filter element and the annular connecting portion, and the second pre-filter element and the annular connecting portion are both sealed together.

[0016] In some embodiments, a first end cap is provided at the end of the first pre-filter element away from the second pre-filter element. The first end cap is connected to the outer peripheral surface of the second filter assembly and the first pre-filter element. The first end cap is configured to block one end of the second water passage.

[0017] And / or, the second pre-filter element is provided with a second end cap at one end away from the first pre-filter element, the second end cap is connected to the outer peripheral surface of the second filter assembly and the second pre-filter element, and the second end cap is configured to block the other end of the second water passage.

[0018] In some embodiments, the first end cap is sealed to the outer peripheral surface of the second filter assembly and the first pre-filter element, and the second end cap is sealed to the outer peripheral surface of the second filter assembly and the second pre-filter element.

[0019] In some embodiments, the first pre-filter includes a non-woven fabric layer, a PP cotton layer, an origami PP layer and an activated carbon layer stacked sequentially.

[0020] And / or, the second pre-filter includes a non-woven fabric layer, a PP cotton layer, a folded PP layer and an activated carbon layer stacked in sequence.

[0021] In some embodiments, the second filtration assembly includes at least one of a nanofiltration membrane and a reverse osmosis membrane.

[0022] Secondly, this utility model provides a water purification device, including the composite filter element described in any one of the first aspects.

[0023] The beneficial effects of this utility model are:

[0024] The composite filter element provided by this utility model integrates a first filter component and a second filter component inside the housing, and the first filter component is sleeved on the outer periphery of the second filter component, so that the multi-stage filter element forms a nested combination structure, which greatly improves the compactness and integration of the structure, thereby effectively reducing the overall volume and saving installation space. At the same time, the water flow passes through the pre-inlet chamber, the first pre-filter element, the second water passage, the second pre-filter element and then to the pre-outlet chamber in sequence, forming an S-shaped flow path. This design prolongs the contact time between the water flow and the first and second pre-filter elements, so that the water flow can interact more fully with the filter element material, thereby significantly improving the filtration effect.

[0025] The water purification device provided by this utility model, due to the use of the above-mentioned composite filter element, helps to reduce the overall size of the machine, save installation space, and at the same time has a better filtration effect. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the composite filter element provided in an embodiment of this utility model;

[0028] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0029] In the picture:

[0030] 1. Shell; 11. Inlet; 12. First outlet; 13. Second outlet;

[0031] 2. First filter assembly; 21. First pre-filter element; 22. Second pre-filter element;

[0032] 3. Second filter component;

[0033] 4. First sealing element;

[0034] 5. Mounting base; 51. Annular connecting part; 511. Upper end face; 512. Lower end face; 52. First limiting part; 53. Second limiting part;

[0035] 6. First end cap;

[0036] 7. Second end cap;

[0037] 8. Third end cap;

[0038] 100. First water passage; 101. Pre-inlet chamber; 102. Pre-outlet chamber; 200. Second water passage; 300. Guide chamber. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] This embodiment provides a water purification device, including a composite filter element.

[0047] like Figure 1 As shown, the composite filter element includes a housing 1, on which an inlet 11, a first outlet 12, and a second outlet 13 are provided.

[0048] The housing 1 is provided with a first filter assembly 2 and a second filter assembly 3. The first filter assembly 2 is sleeved on the outer wall of the second filter assembly 3. The outer wall of the second filter assembly 3 is not permeable to water, so that a first water passage 100 is formed between the outer wall of the first filter assembly 2 and the inner wall of the housing 1, and a second water passage 200 is formed between the inner wall of the first filter assembly 2 and the outer wall of the second filter assembly 3.

[0049] The outer wall of the first filter assembly 2 is also provided with a first sealing element 4, which divides the first water passage 100 into a pre-inlet chamber 101 and a pre-outlet chamber 102.

[0050] The first filter assembly 2 also includes a first pre-filter element 21 and a second pre-filter element 22. The first pre-filter element 21 is connected to the pre-inlet chamber 101 and the second water passage 200, respectively, and the second pre-filter element 22 is connected to the second water passage 200 and the pre-outlet chamber 102, respectively.

[0051] The water flow direction in the second pre-filter 22 is opposite to that in the first pre-filter 21.

[0052] In practice, the water to be filtered enters the housing 1 through the inlet 11 and flows into the pre-inlet chamber 101 of the first water passage 100. The water in the pre-inlet chamber 101 flows into the first pre-filter element 21 from its outer circumferential surface for initial filtration. The water after initial filtration flows out from the inner circumferential surface of the first pre-filter element 21 to the second water passage 200. Since the outer wall of the second filter assembly 3 is not permeable to water, the water in the second water passage 200 flows further into the second pre-filter element 22 from its inner circumferential surface for secondary filtration. The water after secondary filtration flows out from the outer circumferential surface of the second pre-filter element 22 to the pre-outlet chamber 102. The water in the pre-outlet chamber 102 then flows into the second filter assembly 3 for tertiary filtration. Finally, the pure water produced after three filtrations flows out from the first outlet 12, and the wastewater flows out from the second outlet 13.

[0053] For example, with Figure 1 Taking the orientation shown as an example, the bottom end face of the second filter component 3 along the axial direction of the composite filter element is the water inlet end, and the top end face is the water outlet end. The pre-outlet chamber 102 is connected to the water inlet end of the second filter component 3, and the first outlet 12 and the second outlet 13 are connected to the water outlet end of the second filter component 3.

[0054] The composite filter element provided in this embodiment integrates a first filter component 2 and a second filter component 3 inside the housing 1, and the first filter component 2 is fitted around the outer periphery of the second filter component 3, so that the multi-stage filter element forms a nested combination structure, which greatly improves the compactness and integration of the structure, thereby effectively reducing the overall volume and saving installation space. At the same time, the water flow passes through the pre-inlet chamber 101, the first pre-filter element 21, the second water passage 200, the second pre-filter element 22 and then to the pre-outlet chamber 102 in sequence, forming an S-shaped flow path. This design prolongs the contact time between the water flow and the first pre-filter element 21 and the second pre-filter element 22, so that the water flow can interact more fully with the filter element material, thereby significantly improving the filtration effect.

[0055] The water purification device provided in this embodiment, due to the use of the aforementioned composite filter element, helps to reduce the overall size of the device, save installation space, and at the same time achieve a better filtration effect.

[0056] like Figure 1 and Figure 2 As shown, in some embodiments, a mounting base 5 is provided between the first pre-filter element 21 and the second pre-filter element 22. Both the first pre-filter element 21 and the second pre-filter element 22 are connected to the mounting base 5, and the mounting base 5 is connected to the inner wall of the housing 1.

[0057] With this configuration, the mounting base 5 provides stable support for the first pre-filter element 21 and the second pre-filter element 22.

[0058] Furthermore, such as Figure 2 As shown, in some embodiments, the mounting base 5 includes an annular connecting portion 51, a first limiting portion 52, and a second limiting portion 53. The bottom surface of the first pre-filter 21 is connected to the upper end surface 511 of the annular connecting portion 51, and the top surface of the second pre-filter 22 is connected to the lower end surface 512 of the annular connecting portion 51. The radially outer side of the annular connecting portion 51 is connected to the inner wall of the housing 1. The first limiting portion 52 and the second limiting portion 53 are both connected to the annular connecting portion 51 and extend in opposite directions along the axial direction of the composite filter element. A portion of the outer peripheral surface of the first pre-filter 21 abuts against the inner wall of the first limiting portion 52, and a portion of the outer peripheral surface of the second pre-filter 22 abuts against the inner wall of the second limiting portion 53.

[0059] With this configuration, the annular connecting part 51 can connect with the first pre-filter element 21, the second pre-filter element 22, and the housing 1, which helps to enhance the stability and robustness of the overall structure. The first limiting part 52 and the second limiting part 53 are respectively positioned to abut against the outer peripheral surfaces of the first pre-filter element 21 and the second pre-filter element 22 to limit the radial displacement of the first pre-filter element 21 and the second pre-filter element 22 and prevent them from shaking.

[0060] Optionally, the annular connecting part 51, the first limiting part 52, and the second limiting part 53 are integrally molded.

[0061] like Figure 1 and Figure 2 As shown, in some embodiments, the first sealing member 4 is sleeved and connected to the outer peripheral surface of the annular connecting portion 51, and the first sealing member 4 abuts against the inner wall of the housing 1 to make the mounting base 5 and the inner wall of the housing 1 sealed together.

[0062] This configuration integrates the first seal 4 with the mounting base 5, providing a stable and reliable mounting carrier for the first seal 4 through the annular connecting part 51, ensuring the sealing effect and thus ensuring strict isolation between the pre-inlet chamber 101 and the pre-outlet chamber 102; it also enhances the structural compactness and optimizes the internal structural layout of the composite filter element.

[0063] Alternatively, the first pre-filter element 21 and the annular connecting portion 51, and the second pre-filter element 22 and the annular connecting portion 51 are both sealed together. This arrangement effectively prevents water from flowing into the connection gap between the first pre-filter element 21, the second pre-filter element 22 and the annular connecting portion 51, ensuring that the water can be fully filtered according to the preset path.

[0064] like Figure 1 As shown, in some embodiments, a first end cap 6 is provided at the end of the first pre-filter 21 away from the second pre-filter 22. The first end cap 6 is connected to the outer peripheral surface of the second filter assembly 3 and the first pre-filter 21. The first end cap 6 is configured to block one end of the second water passage 200.

[0065] By setting the first end cap 6, the inlet and outlet water of the first pre-filter 21 can be separated, preventing unfiltered water entering through the inlet 11 from flowing directly into the second water passage 200.

[0066] like Figure 1 As shown, in some embodiments, a second end cap 7 is provided at the end of the second pre-filter 22 away from the first pre-filter 21. The second end cap 7 is connected to the outer peripheral surface of the second filter assembly 3 and the second pre-filter 22. The second end cap 7 is configured to block the other end of the second water passage 200.

[0067] By setting the second end cap 7, the inlet and outlet of the second pre-filter 22 can be separated, preventing water in the second water passage 200 from flowing out directly without passing through the second pre-filter 22.

[0068] Optionally, the first end cap 6 is sealed to the outer peripheral surface of the second filter assembly 3 and the first pre-filter element 21, and the second end cap 7 is sealed to the outer peripheral surface of the second filter assembly 3 and the second pre-filter element 22. This sealed connection further eliminates gaps at the connection points between the first end cap 6, the second end cap 7, and related components, preventing water from flowing into these gaps and ensuring that the water can be fully filtered along a preset path.

[0069] like Figure 1 As shown, in some embodiments, the inlet 11, the first outlet 12, and the second outlet 13 are all located on the same shell wall of the housing 1. This arrangement ensures that the inlet and outlet interfaces are on the same side, facilitating centralized planning of external pipeline routes, significantly improving the convenience of external pipeline connections, and reducing installation difficulty and space occupation.

[0070] like Figure 1 As shown, in some embodiments, the outlet end of the second filter component 3 is connected to a third end cap 8, the third end cap 8 is connected to the housing 1, the first outlet 12 and the second outlet 13 are located inside the third end cap 8, the inlet 11 is located outside the third end cap 8, and a flow guiding cavity 300 is formed between the third end cap 8 and the inner wall of the housing 1. The inlet 11, the flow guiding cavity 300 and the first water passage 100 are connected.

[0071] The water to be filtered flows into the guide cavity 300 from the inlet 11, and then smoothly transitions to the first water passage 100 through the guide cavity 300. The third end cap 8 separates the water inlet from the second filter component 3, ensuring that the water flows orderly inside the housing 1 along a preset path.

[0072] Optionally, the third end cap 8 is sealed to the housing 1, and the third end cap 8 is sealed to the second filter assembly 3.

[0073] Optionally, the first pre-filter 21 includes a non-woven fabric layer, a PP cotton layer, a folded PP layer, and an activated carbon layer stacked sequentially. The non-woven fabric layer and the PP cotton layer first intercept large particulate impurities such as mud, sand, and rust, the folded PP layer further filters fine particulate matter, and the activated carbon layer adsorbs odors, organic matter, etc., so that the first pre-filter 21 achieves multi-stage progressive filtration.

[0074] Similarly, the second pre-filter 22 may also include a non-woven fabric layer, a PP cotton layer, a folded PP layer and an activated carbon layer stacked in sequence.

[0075] Optionally, the second filtration component 3 includes at least one of nanofiltration membrane and reverse osmosis membrane. The second filtration component 3, configured as a membrane element, can perform deep filtration on the pre-filtered water, intercepting microorganisms, heavy metals, soluble salts and other fine impurities in the water, and significantly improving the purity of the purified water.

[0076] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A composite filter element, characterized in that, Includes a housing (1), on which a water inlet (11), a first water outlet (12), and a second water outlet (13) are provided; The housing (1) is provided with a first filter assembly (2) and a second filter assembly (3). The first filter assembly (2) is sleeved on the outer wall of the second filter assembly (3). The outer wall of the second filter assembly (3) is not permeable to water, so that a first water passage (100) is formed between the outer wall of the first filter assembly (2) and the inner wall of the housing (1), and a second water passage (200) is formed between the inner wall of the first filter assembly (2) and the outer wall of the second filter assembly (3). The outer wall of the first filter assembly (2) is also provided with a first sealing member (4), which divides the first water passage (100) into a front water inlet chamber (101) and a front water outlet chamber (102). The first filter assembly (2) further includes a first pre-filter (21) and a second pre-filter (22). The first pre-filter (21) is connected to the pre-inlet chamber (101) and the second water passage (200) respectively, and the second pre-filter (22) is connected to the second water passage (200) and the pre-outlet chamber (102) respectively. The water flow direction in the second pre-filter (22) is opposite to that in the first pre-filter (21).

2. The composite filter element according to claim 1, characterized in that, A mounting base (5) is provided between the first pre-filter (21) and the second pre-filter (22). Both the first pre-filter (21) and the second pre-filter (22) are connected to the mounting base (5), and the mounting base (5) is connected to the inner wall of the housing (1).

3. The composite filter element according to claim 2, characterized in that, The mounting base (5) includes an annular connecting part (51), a first limiting part (52) and a second limiting part (53). The bottom surface of the first pre-filter (21) is connected to the upper end surface (511) of the annular connecting part (51), and the top surface of the second pre-filter (22) is connected to the lower end surface (512) of the annular connecting part (51). The radially outer side of the annular connecting part (51) is connected to the inner wall of the housing (1). The first limiting part (52) and the second limiting part (53) are both connected to the annular connecting part (51) and extend opposite to each other along the axial direction of the composite filter. A portion of the outer peripheral surface of the first pre-filter (21) abuts against the inner wall of the first limiting part (52), and a portion of the outer peripheral surface of the second pre-filter (22) abuts against the inner wall of the second limiting part (53).

4. The composite filter element according to claim 3, characterized in that, The first sealing element (4) is sleeved and connected to the outer peripheral surface of the annular connecting part (51), and the first sealing element (4) abuts against the inner wall of the housing (1) to make the mounting base (5) and the inner wall of the housing (1) sealed together.

5. The composite filter element according to claim 3, characterized in that, The first pre-filter (21) and the annular connecting part (51) are sealed together, as are the second pre-filter (22) and the annular connecting part (51).

6. The composite filter element according to claim 1, characterized in that, The first pre-filter (21) is provided with a first end cap (6) at the end away from the second pre-filter (22). The first end cap (6) is connected to the outer peripheral surface of the second filter assembly (3) and the first pre-filter (21). The first end cap (6) is configured to block one end of the second water passage (200). And / or, the second pre-filter (22) is provided with a second end cap (7) at one end away from the first pre-filter (21), the second end cap (7) is connected to the outer peripheral surface of the second filter assembly (3) and the second pre-filter (22), and the second end cap (7) is configured to block the other end of the second water passage (200).

7. The composite filter element according to claim 6, characterized in that, The first end cap (6) is sealed to the outer peripheral surface of the second filter assembly (3) and the first pre-filter (21), and the second end cap (7) is sealed to the outer peripheral surface of the second filter assembly (3) and the second pre-filter (22).

8. The composite filter element according to any one of claims 1 to 7, characterized in that, The first pre-filter (21) includes a non-woven fabric layer, a PP cotton layer, a paper PP layer and an activated carbon layer stacked in sequence; And / or, the second pre-filter (22) includes a non-woven fabric layer, a PP cotton layer, a paper PP layer and an activated carbon layer stacked in sequence.

9. The composite filter element according to any one of claims 1 to 7, characterized in that, The second filtration component (3) includes at least one of nanofiltration membrane and reverse osmosis membrane.

10. A water purification device, characterized in that, The composite filter element includes any one of claims 1 to 9.

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