Filter bottle with composite filter element

Abstract

The utility model discloses a composite filter element filter bottle which comprises a shell and a top cover detachably arranged at the top of the shell, a filter space is formed in the shell, a front filter part and a rear filter part are inserted in the filter space, the periphery of the rear filter part is covered with an isolation hood, and the front filter part and the rear filter part are arranged in the isolation hood. The filter space is divided into a first filter cavity and a second filter cavity, the front filter part is arranged in the first filter cavity, and the rear filter part is arranged in the second filter cavity; a first water inlet, a first water outlet, a second water inlet and a second water outlet are formed in the bottom of the shell, the first water inlet is communicated with the first filtering cavity to form a first filtering channel, and the first water outlet is communicated with the first filtering channel and connected with the second water inlet to form a backflow channel; the second water inlet is communicated with the second filter cavity to form a second filter channel, and the second water outlet is communicated with the second filter cavity to form a water outlet channel.

Description

Technical Field

[0001] This utility model relates to the field of filter element technology, specifically to a composite filter element filter bottle. Background Technology

[0002] The main function of a water purifier is to remove impurities from water, making tap water suitable for direct drinking. These impurities include bacteria, viruses, heavy metals, residual chlorine, scale, volatile substances, rust, and sediment. These harmful substances can pose a threat to human health, such as those found in industrial wastewater, pesticide-contaminated water, and animal excrement. Water purifiers effectively remove these harmful substances through purely physical filtration methods, providing purified water with a better taste, thus becoming the most ideal drinking water treatment solution for families.

[0003] Existing water purifiers generally filter tap water using filter cartridges. However, existing filter cartridge bottles only have one inlet and one outlet, and can only install single-function filter materials. This results in problems of excessive filtration performance and wasted space and raw materials. Multiple filter cartridges need to be installed at the same time to ensure filtration effect, which increases the size of the water purifier and makes subsequent maintenance and replacement inconvenient for users. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a composite filter element filter bottle.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A composite filter cartridge includes a housing and a top cover detachably disposed on the top of the housing. The housing forms a filtration space, in which a pre-filter and a post-filter are inserted. The post-filter is surrounded by an isolation cover, which divides the filtration space into a first filtration chamber and a second filtration chamber. The pre-filter is placed in the first filtration chamber, and the post-filter is placed in the second filtration chamber.

[0007] The bottom of the outer casing is provided with a first water inlet, a first water outlet, a second water inlet, and a second water outlet. The first water inlet is connected to the first filter chamber to form a first filter channel. The first water outlet is connected to the first filter channel and connected to the second water inlet to form a return channel. The second water inlet is connected to the second filter chamber to form a second filter channel, and the second water outlet is connected to the second filter chamber to form a water outlet channel.

[0008] Preferably, the top cover and the outer shell are connected by threads. The outer shell has a first sealing groove on its outer periphery, and a first sealing ring is disposed in the first sealing groove. The first sealing ring abuts against the inner wall of the top cover. Through the above improvements, the top cover and the outer shell are connected by threads, which improves the convenience of installing and disassembling the top cover and makes it easier to maintain and replace the internal filter structure later. In addition, the first sealing groove on the outer periphery of the outer shell, the first sealing ring disposed in the first sealing groove, and the first sealing ring abuts against the inner wall of the top cover ensure the sealing between the top cover and the outer shell.

[0009] Preferably, the pre-filtration section includes a PP cotton filter layer and a carbon rod layer, and the post-filtration section includes a carbon rod layer. Through the above improvements, in the entire water filtration process, water enters the first filtration chamber through the first inlet, completes the coarse filtration process through the PP cotton filter layer and carbon rod layer of the pre-filtration section, and then undergoes a second filtration through a reverse osmosis membrane, nanofiltration membrane, or ultrafiltration membrane. After the second filtration, the water is injected into the second filtration chamber through the second inlet, and then undergoes deep adsorption filtration by the carbon rod layer of the post-filtration section. After filtration, the water is discharged from the second outlet, which greatly improves the filtration effect.

[0010] Preferably, the top of the pre-filter is provided with a first upper fixing cover, and the first upper fixing cover has a plug-in protrusion. The top cover has a plug-in groove for the plug-in protrusion to be inserted. With the above improvements, the plug-in protrusion is provided on the first upper fixing cover and the plug-in groove is provided on the top cover. When the top cover is connected to the outer shell, the plug-in protrusion on the first upper fixing cover will be inserted into the plug-in groove, which greatly improves the stability of the pre-filter installation.

[0011] Preferably, the bottom of the pre-filter and the post-filter is provided with a lower fixing cover, which is inserted into the outer shell and forms a second sealing groove. A second sealing ring is provided in the second sealing groove and abuts against the outer shell. Through the above improvement, the connection between the pre-filter and the post-filter and the outer shell is realized by using the lower fixing cover. The lower fixing cover forms a second sealing groove, and the second sealing ring is provided in the second sealing groove, which increases the sealing performance of the connection between the lower fixing cover and the outer shell and avoids water leakage, so as to avoid affecting the filtration effect.

[0012] Preferably, a connecting groove for inserting an isolation cover is formed inside the outer shell, and a third sealing groove is formed on the outer periphery of the isolation cover. A third sealing ring is provided in the third sealing groove, and the third sealing ring abuts against the connecting groove. Through the above improvements, a third sealing ring is provided in the third sealing groove, and the third sealing ring abuts against the connecting groove, thereby increasing the sealing performance between the first filter chamber and the second filter chamber.

[0013] Preferably, an elastic sleeve is provided in the insertion groove, and the insertion protrusion is inserted into the elastic sleeve. With the above improvement, when the top cover is connected to the outer shell, the insertion protrusion is inserted into the elastic sleeve, thereby further improving the stability of the pre-filter installation.

[0014] Preferably, the top of the post-filter is provided with a second upper fixing cover, the isolation cover is provided with an elastic squeezing part, and the second upper fixing cover is formed with a squeezing positioning groove for the elastic squeezing part to be inserted. Through the above improvements, the elastic squeezing part on the isolation cover will squeeze the squeezing positioning groove, thereby further improving the stability of the installation of the post-filter.

[0015] Preferably, a sliding groove is formed on the isolation cover, the elastic squeezing part is inserted into the sliding groove, and an elastic element is provided in the sliding groove. One end of the elastic element abuts against the sliding groove, and the other end abuts against the elastic squeezing part, so that the elastic squeezing part always has a tendency to move towards the squeezing positioning groove. Through the above improvement, the elastic element is used to act on the elastic squeezing part, so that the elastic squeezing part can apply pressure to the second upper fixed cover, thereby increasing the stability of the installation of the post-filter.

[0016] Preferably, the outer periphery of the isolation cover has an annular abutment protrusion that abuts against the pre-filter, and the annular abutment protrusion has a water passage hole. Through the above improvements, the annular abutment protrusion abuts against the inner wall of the pre-filter to ensure the stability of the isolation cover installation, and the water passage hole ensures the water passage effect.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] By setting an isolation cover inside the outer casing, the filtration space inside the outer casing is divided into a first filtration chamber and a second filtration chamber. A pre-filter and a post-filter are inserted into the filtration space, with the pre-filter placed in the first filtration chamber and the post-filter placed in the second filtration chamber. During the entire filtration process, water enters the first filtration chamber through the first inlet, undergoes coarse filtration by the pre-filter, and is then injected into the second filtration chamber through the second inlet. The post-filter then adsorbs and filters the water, which is discharged from the second outlet. This allows for the use of multiple filter materials within a single filter cartridge, improving filtration quality and reducing the number of filter cartridges in the water purifier, thus reducing its size. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0020] Figure 2 This is a schematic diagram of the bottom of the overall structure of Embodiment 1 of this utility model;

[0021] Figure 3 This is a cross-sectional view of the first filter channel in Embodiment 1 of this utility model;

[0022] Figure 4 This is a cross-sectional view of the reflux channel and the second filter channel in Embodiment 1 of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the isolation cover according to Embodiment 1 of this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the post-filter section in Embodiment 1 of this utility model;

[0025] Figure 7 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0026] Figure 8 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0027] Figure 9 This is a structural schematic diagram of Embodiment 4 of the present invention;

[0028] In the diagram: 1. Outer shell; 2. Top cover; 3. Filtration space; 4. Pre-filter; 5. Post-filter; 6. Isolation cover; 7. First filter chamber; 8. Second filter chamber; 9. First inlet; 10. First outlet; 11. Second inlet; 12. Second outlet; 13. First filter channel; 14. Return channel; 15. Second filter channel; 16. Outlet channel; 1.1. First sealing groove; 1.2. First sealing ring; 1.3. 1.4 Upper fixed cover; 1.5 Insertion protrusion; 1.6 Insertion groove; 1.7 Lower fixed cover; 1.8 Second sealing groove; 1.9 Second sealing ring; 2.1 Connecting groove; 2.2 Third sealing groove; 2.3 Third sealing ring; 3.1 Elastic sleeve; 3.2 Second upper fixed cover; 3.3 Elastic extrusion part; 3.4 Extrusion positioning groove; 3.5 Sliding groove; 3.6 Elastic element; 3.7 Annular abutment protrusion; 3.8 Water passage hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0031] Example 1

[0032] like Figure 1-6 As shown, a composite filter cartridge includes a housing 1 and a top cover 2 detachably disposed on the top of the housing 1. The housing 1 forms a filtration space 3. A pre-filter 4 and a post-filter 5 are inserted into the filtration space 3. The post-filter 5 is covered by an isolation cover 6, which divides the filtration space 3 into a first filtration chamber 7 and a second filtration chamber 8. The pre-filter 4 is placed in the first filtration chamber 7, and the post-filter 5 is placed in the second filtration chamber 8.

[0033] Specifically, the bottom of the outer casing is provided with a first water inlet 9, a first water outlet 10, a second water inlet 11, and a second water outlet 12. The first water inlet 9 is connected to the first filter chamber 7 to form a first filter channel 13. The first water outlet 10 is connected to the first filter channel 13 and connected to the second water inlet 11 to form a return channel 14. The second water inlet 11 is connected to the second filter chamber 8 to form a second filter channel 15, and the second water outlet 12 is connected to the second filter chamber 8 to form a water outlet channel 16.

[0034] By setting an isolation cover 6 inside the outer shell 1, the filtration space 3 inside the outer shell 1 is divided into a first filtration chamber 7 and a second filtration chamber 8. A pre-filter 4 and a post-filter 5 are inserted into the filtration space 3, with the pre-filter 4 placed in the first filtration chamber 7 and the post-filter 5 placed in the second filtration chamber 8. During the entire filtration process, water enters the first filtration chamber 7 through the first inlet 9, and after coarse filtration by the pre-filter 4, the water is injected into the second filtration chamber 8 through the second inlet 11. Then, the post-filter 5 adsorbs and filters the water, and the water is discharged from the second outlet 12. This achieves filtration with multiple filter materials in a single filter cartridge bottle, which not only improves the filtration quality but also reduces the number of filter cartridges in the water purifier, thereby reducing the size of the water purifier.

[0035] Regarding the further explanation of the connection between the top cover 2 and the outer shell 1 in this embodiment, the top cover 2 and the outer shell 1 are connected by threads. The outer shell 1 has a first sealing groove 1.1 on its outer periphery, and a first sealing ring 1.2 is provided in the first sealing groove 1.1. The first sealing ring 1.2 abuts against the inner wall of the top cover 2. The connection between the top cover 2 and the outer shell 1 by the threads improves the convenience of installing and disassembling the top cover 2, and makes it easier to maintain and replace the internal filter structure later. In addition, the first sealing groove 1.1 on the outer periphery of the outer shell 1 and the first sealing ring 1.2 abutting against the inner wall of the top cover 2 ensure the sealing between the top cover 2 and the outer shell 1.

[0036] In other embodiments, the top cover 2 can be snapped into the outer shell 1 to achieve quick connection between the top cover 2 and the outer shell 1, and a sealing ring can be used to ensure the sealing between the top cover 2 and the outer shell 1.

[0037] As a further explanation of the composition of the pre-filter 4 and the post-filter 5 in this embodiment, the pre-filter 4 includes a PP cotton filter layer and a carbon rod layer, and the post-filter 5 includes a carbon rod layer.

[0038] Furthermore, during the entire water filtration process, water enters the first filtration chamber 7 through the first inlet 9, and undergoes coarse filtration through the PP cotton filter layer and carbon rod layer of the pre-filtration section 4. The coarsely filtered water then undergoes a second filtration through a reverse osmosis membrane, nanofiltration membrane, or ultrafiltration membrane. After the second filtration, the water is injected into the second filtration chamber 8 through the second inlet 11, and then undergoes deep adsorption filtration through the carbon rod layer of the post-filtration section 5. After filtration, the water is discharged from the second outlet 12, significantly improving the filtration effect.

[0039] Regarding the further explanation of the installation of the pre-filter 4, the post-filter 5, and the isolation cover 6 in this embodiment, the top of the pre-filter 4 is provided with a first upper fixing cover 1.3, and the first upper fixing cover 1.3 is provided with a plug-in protrusion 1.4. The top cover 2 is provided with a plug-in groove 1.5 for the plug-in protrusion 1.4 to be inserted. The plug-in protrusion 1.4 is provided on the first upper fixing cover 1.3, and the plug-in groove 1.5 is provided on the top cover 2. When the top cover 2 is connected to the outer shell 1, the plug-in protrusion 1.4 on the first upper fixing cover 1.3 will be inserted into the plug-in groove 1.5, which greatly improves the stability of the installation of the pre-filter 4.

[0040] Specifically, the bottom of the pre-filter section 4 and the post-filter section 5 are provided with a lower fixing cover 1.6. The lower fixing cover 1.6 is inserted into the outer shell 1, and the lower fixing cover 1.6 forms a second sealing groove 1.7. A second sealing ring 1.8 is provided in the second sealing groove 1.7, and the second sealing ring 1.8 abuts against the outer shell 1.

[0041] The lower fixing cover 1.6 is used to connect the pre-filter section 4 and the post-filter section 5 to the outer shell 1. The lower fixing cover 1.6 forms a second sealing groove 1.7, and a second sealing ring 1.8 is provided in the second sealing groove 1.7, which increases the sealing performance of the connection between the lower fixing cover 1.6 and the outer shell 1, and avoids water leakage, so as to avoid affecting the filtration effect.

[0042] Furthermore, a connecting groove 2.1 for inserting the isolation cover 6 is formed inside the outer shell 1, and a third sealing groove 2.2 is formed on the outer periphery of the isolation cover 6. A third sealing ring 2.3 is provided in the third sealing groove 2.2, and the third sealing ring 2.3 abuts against the connecting groove 2.1. Through the above improvements, the third sealing ring 2.3 is provided in the third sealing groove 2.2, and the third sealing ring 2.3 abuts against the connecting groove 2.1, thereby increasing the sealing performance between the first filter chamber 7 and the second filter chamber 8.

[0043] Example 2

[0044] like Figure 7 As shown, the difference between this embodiment and the first embodiment is that an elastic sleeve 3.1 is provided in the insertion groove 1.5, and the insertion protrusion 1.4 is inserted into the elastic sleeve 3.1. When the top cover 2 is connected to the outer shell 1, the insertion protrusion 1.4 is inserted into the elastic sleeve 3.1, which further improves the stability of the installation of the pre-filter 4.

[0045] Example 3

[0046] like Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that an annular abutment protrusion 3.7 is formed on the outer periphery of the isolation cover 6. The annular abutment protrusion 3.7 abuts against the pre-filter 4, and a water passage hole 3.8 is formed on the annular abutment protrusion 3.7. The annular abutment protrusion 3.7 abuts against the inner wall of the pre-filter 4 to ensure the stable installation of the isolation cover 6, and the water passage hole 3.8 is provided to ensure the water passage effect.

[0047] Since the pre-filter 4 and the top cover 2 have a high degree of stability, the annular abutment protrusion 3.7 abuts against the inner wall of the pre-filter 4 to ensure the stability of the installation of the isolation cover 6.

[0048] Example 4

[0049] like Figure 9 As shown, the difference between this embodiment and Embodiment 1 is that the top of the post-filter section 5 is provided with a second upper fixing cover 3.2, the isolation cover 6 is provided with an elastic squeezing part 3.3, and the second upper fixing cover 3.2 is formed with a squeezing positioning groove 3.4 for the elastic squeezing part 3.3 to be inserted. The elastic squeezing part 3.3 on the isolation cover 6 will squeeze the squeezing positioning groove 3.4, thereby further improving the stability of the installation of the post-filter section 5.

[0050] Specifically, a sliding groove 3.5 is formed on the isolation cover 6, and an elastic pressing part 3.3 is inserted into the sliding groove 3.5. An elastic element 3.6 is provided in the sliding groove 3.5. One end of the elastic element 3.6 abuts against the sliding groove 3.5, and the other end abuts against the elastic pressing part 3.3, so that the elastic pressing part 3.3 always has a tendency to move towards the pressing positioning groove 3.4. The elastic element 3.6 acts on the elastic pressing part 3.3, so that the elastic pressing part 3.3 can apply pressure to the second upper fixed cover 3.2 to increase the stability of the installation of the rear filter part 5.

[0051] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A composite filter cartridge bottle, characterized in that, Includes an outer shell (1) and a top cover (2) detachably disposed on the top of the outer shell (1). The outer shell (1) forms a filter space (3). A pre-filter (4) and a post-filter (5) are inserted in the filter space (3). The post-filter (5) is covered with an isolation cover (6) and divides the filter space (3) into a first filter chamber (7) and a second filter chamber (8). The pre-filter (4) is placed in the first filter chamber (7) and the post-filter (5) is placed in the second filter chamber (8). The bottom of the outer shell (1) is provided with a first water inlet (9), a first water outlet (10), a second water inlet (11), and a second water outlet (12). The first water inlet (9) is connected to the first filter chamber (7) to form a first filter channel (13). The first water outlet (10) is connected to the first filter channel (13) and connected to the second water inlet (11) to form a return channel (14). The second water inlet (11) is connected to the second filter chamber (8) to form a second filter channel (15). The second water outlet (12) is connected to the second filter chamber (8) to form a water outlet channel (16).

2. The composite filter cartridge bottle according to claim 1, characterized in that, The top cover (2) is connected to the outer shell (1) by a thread, and the outer shell (1) is provided with a first sealing groove (1.1) on its outer periphery. A first sealing ring (1.2) is provided in the first sealing groove (1.1), and the first sealing ring (1.2) abuts against the inner wall of the top cover (2).

3. The composite filter cartridge bottle according to claim 1, characterized in that, The pre-filter (4) includes a PP cotton filter layer and a carbon rod layer, and the post-filter (5) includes a carbon rod layer.

4. A composite filter cartridge bottle according to claim 1, characterized in that, The top of the pre-filter (4) is provided with a first upper fixing cover (1.3), and the first upper fixing cover (1.3) has a plug-in protrusion (1.4), and the top cover (2) has a plug-in groove (1.5) for the plug-in protrusion (1.4) to be inserted.

5. A composite filter cartridge bottle according to claim 1, characterized in that, The bottom of the pre-filter (4) and the post-filter (5) are provided with a lower fixing cover (1.6). The lower fixing cover (1.6) is inserted into the outer shell (1) and the lower fixing cover (1.6) forms a second sealing groove (1.7). A second sealing ring (1.8) is provided in the second sealing groove (1.7) and abuts against the outer shell (1).

6. A composite filter cartridge bottle according to claim 1, characterized in that, The outer shell (1) has a connecting groove (2.1) for inserting the isolation cover (6), and the outer periphery of the isolation cover (6) has a third sealing groove (2.2). A third sealing ring (2.3) is provided in the third sealing groove (2.2), and the third sealing ring (2.3) abuts against the connecting groove (2.1).

7. A composite filter cartridge bottle according to claim 4, characterized in that, An elastic sleeve (3.1) is provided inside the insertion groove (1.5), and the insertion protrusion (1.4) is inserted into the elastic sleeve (3.1).

8. A composite filter cartridge bottle according to claim 1, characterized in that, The top of the post-filter section (5) is provided with a second upper fixing cover (3.2), the isolation cover (6) is provided with an elastic squeezing part (3.3), and the second upper fixing cover (3.2) is provided with a squeezing positioning groove (3.4) for the elastic squeezing part (3.3) to be inserted.

9. A composite filter cartridge bottle according to claim 8, characterized in that, A sliding groove (3.5) is formed on the isolation cover (6), the elastic extrusion part (3.3) is inserted into the sliding groove (3.5), and an elastic element (3.6) is provided in the sliding groove (3.5). One end of the elastic element (3.6) abuts against the sliding groove (3.5), and the other end abuts against the elastic extrusion part (3.3), so that the elastic extrusion part (3.3) always has a tendency to move toward the extrusion positioning groove (3.4).

10. A composite filter cartridge bottle according to claim 1, characterized in that, The outer periphery of the isolation cover (6) has an annular abutment protrusion (3.7) that abuts against the pre-filter (4), and a water passage hole (3.8) is formed on the annular abutment protrusion (3.7).

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