Front-rear composite filter element

Abstract

The utility model discloses a front-rear composite filter element which comprises a shell, and a front filter element, a front barrel, a front end cover, a rear filter element, a rear barrel and a rear end cover which are arranged in the shell, the two ends of the rear filter element are respectively connected with the rear cylinder and the rear end cover; the two ends of the front filter element are respectively connected with the front cylinder and the front end cover; a first cavity is formed between the outer wall of the front filter element and the inner wall of the shell; a second cavity is formed between the inner wall of the front filter element and the outer wall of the front cylinder; a third cavity is formed among the inner wall of the rear cylinder, the inner wall of the front cylinder, the outer wall of the rear filter element and the outer wall of the rear end cover; a fourth cavity is formed between the inner wall of the rear filter element and the inner wall of the rear end cover; the first cavity is communicated with a front water inlet, the second cavity is communicated with a front water outlet, the third cavity is communicated with a rear water inlet, and the fourth cavity is communicated with a rear water outlet. According to the utility model, the problem of internal water mixing caused by deformation of the shell can be prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of filter elements, and in particular to a pre- and post-filter composite filter element. Background Technology

[0002] Water purifiers are very common in China and are installed in most households. However, water purifier manufacturers offer a wide variety of filter cartridges. With the increasing variety of filtration materials, water purifiers generally have pre-filters, reverse osmosis filters, and post-carbon rod filters, which makes the whole machine larger in size. In addition, the filter cartridges have many internal parts and the assembly process is more complicated.

[0003] There are some pre- and post-filter composite elements on the market, but their complex processes and designs lead to certain problems in both manufacturing yield and installation. Summary of the Invention

[0004] In response to the aforementioned problems with existing filter elements, this paper aims to provide a pre- and post-filter composite filter element that reduces the overall size of the device, simplifies the installation structure, and lowers the frequency of filter element replacement for consumers.

[0005] The specific technical solution is as follows:

[0006] A pre- and post-filter composite filter element includes: a housing, and a pre-filter element, a pre-cylinder body, a pre-end cap, a post-filter element, a post-cylinder body, and a post-end cap disposed within the housing.

[0007] The two ends of the rear filter element are respectively connected to the rear cylinder and the rear end cap;

[0008] The two ends of the pre-filter are respectively connected to the pre-filter body and the pre-filter end cap;

[0009] A first cavity is formed between the outer wall of the pre-filter and the inner wall of the housing;

[0010] A second cavity is formed between the inner wall of the pre-filter and the outer wall of the pre-filter body;

[0011] A third cavity is formed between the inner wall of the rear cylinder, the inner wall of the front cylinder, the outer wall of the rear filter element, and the outer wall of the rear end cap;

[0012] A fourth cavity is formed between the inner wall of the rear filter element and the inner wall of the rear end cap;

[0013] The first cavity is connected to the pre-water inlet, the second cavity is connected to the pre-water outlet, the third cavity is connected to the rear water inlet, and the fourth cavity is connected to the rear water outlet.

[0014] In the aforementioned pre- and post-container composite filter element, the end of the post-container cylinder abuts against the end of the pre-container cylinder.

[0015] In the aforementioned pre- and post-containment composite filter element, the post-containment cylinder is an integral structure.

[0016] In the aforementioned pre- and post-containment composite filter element, the bottom of the post-containment cylinder has a post-containment annular groove, one end of the post-containment filter element is engaged in the post-containment annular groove, one end of the post-containment end cap has a post-containment inner ring and a post-containment outer ring, and the other end of the post-containment filter element is engaged between the post-containment inner ring and the post-containment outer ring.

[0017] In the aforementioned pre- and post-filter composite element, one end of the pre-filter cylinder has a pre-annular groove, one end of the pre-filter element is fitted into the pre-annular groove, the post-filter end cap has a pre-inner ring and a pre-outer ring, and the other end of the pre-filter element is fitted between the pre-inner ring and the pre-outer ring.

[0018] In the aforementioned pre- and post-container composite filter element, one end of the pre-container cylinder has a conical protrusion ring, and one end of the post-container cylinder has a conical groove, wherein the conical protrusion ring is engaged with the conical groove.

[0019] In the aforementioned pre- and post-container composite filter element, the other end of the post-container end cap extends into or penetrates the pre-container cylinder.

[0020] In the aforementioned pre- and post-filter composite element, the pre-filter body includes a pre-filter straight section and an outer extension section. One side of the outer extension section has a pre-filter retaining ring, and the other side of the outer extension section has the conical convex ring. The pre-filter retaining ring and the pre-filter straight section form the pre-filter ring groove.

[0021] The rear cylindrical body includes a rear straight cylindrical section and an inner extended end cap section. One end of the rear straight cylindrical section has the conical groove, and the other end of the rear straight cylindrical section is connected to the outer periphery of the inner extended end cap section. The inner extended end cap section has the rear annular groove.

[0022] In the aforementioned pre- and post-filter composite cartridge, one end of the housing is provided with a pre-inlet, a pre-outlet, a post-inlet, and a post-outlet. The first chamber is connected to the pre-inlet water via the pre-inlet, the second chamber is connected to the pre-outlet water via the pre-outlet, the third chamber is connected to the post-inlet water via the post-inlet, and the fourth chamber is connected to the post-outlet water via the post-outlet.

[0023] In the aforementioned pre- and post-containment composite filter element, the other end of the housing is provided with an unlocking component.

[0024] The positive effects of the above technical solution compared with the existing technology are:

[0025] This invention can prevent water from seeping into the interior due to shell deformation. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the overall structure of a front- and rear composite filter element according to this utility model;

[0027] Figure 2 This is a schematic diagram of the overall structure of a front- and rear composite filter element according to the present invention;

[0028] In the attached drawings: 1. Housing; 2. Unlocking assembly; 11. Pre-filter element; 12. Pre-cylinder body; 13. Pre-end cap; 21. Rear filter element; 22. Rear cylinder body; 23. Rear end cap; 31. First cavity; 32. Second cavity; 33. Third cavity; 34. Fourth cavity; 41. Rear annular groove; 42. Rear inner ring; 43. Rear outer ring; 44. Conical groove; 51. Pre-annular groove; 52. Pre-inner ring; 53. Pre-outer ring; 54. Conical convex ring; 61. Pre-straight cylinder section; 62. Outer extension section; 63. Pre-locking ring; 71. Rear straight cylinder section; 72. Extension end cap section; 81. Pre-inlet; 82. Pre-outlet; 83. Rear inlet; 84. Rear outlet. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0030] like Figure 1 and Figure 2 As shown, a preferred embodiment of a pre- and post-filter composite cartridge is illustrated, comprising: a housing 1, and a pre-filter 11, a pre-cylinder 12, a pre-end cap 13, a post-filter 21, a post-cylinder 22, and a post-end cap 23 disposed within the housing 1.

[0031] The two ends of the post-filter element 21 are connected to the post-cylinder body 22 and the post-end cap 23, respectively;

[0032] The two ends of the pre-filter element 11 are connected to the pre-filter body 12 and the pre-filter end cap 13, respectively.

[0033] A first cavity 31 is formed between the outer wall of the pre-filter element 11 and the inner wall of the housing 1;

[0034] A second cavity 32 is formed between the inner wall of the pre-filter element 11 and the outer wall of the pre-filter cylinder 12;

[0035] A third cavity 33 is formed between the inner wall of the rear cylinder 22, the inner wall of the front cylinder 12, the outer wall of the rear filter element 21, and the outer wall of the rear end cap 23.

[0036] A fourth cavity 34 is formed between the inner wall of the post-filter element 21 and the inner wall of the post-end cap 23;

[0037] The first chamber 31 is connected to the pre-water inlet, the second chamber 32 is connected to the pre-water outlet, the third chamber 33 is connected to the rear water inlet, and the fourth chamber 34 is connected to the rear water outlet.

[0038] Furthermore, in a preferred embodiment, the end of the rear cylindrical body 22 abuts against the end of the front cylindrical body 12.

[0039] Furthermore, as a preferred embodiment, the rear cylindrical body 22 is a one-piece structure.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0041] Based on the above, this utility model also has the following embodiments:

[0042] For further embodiments of this utility model, please refer to... Figures 1 to 2 As shown, the bottom of the rear cylinder 22 has a rear ring groove 41, one end of the rear filter element 21 is inserted into the rear ring groove 41, one end of the rear end cover 23 has a rear inner ring 42 and a rear outer ring 43, and the other end of the rear filter element 21 is inserted between the rear inner ring 42 and the rear outer ring 43.

[0043] In a further embodiment of the present invention, one end of the front cylinder 12 has a front ring groove 51, one end of the front filter element 11 is fitted into the front ring groove 51, the front end cap 13 has a front inner ring 52 and a front outer ring 53, and the other end of the front filter element 11 is fitted between the front inner ring 52 and the front outer ring 53.

[0044] In a further embodiment of the present invention, one end of the front cylinder 12 has a conical protrusion ring 54, and one end of the rear cylinder 22 has a conical groove 44, with the conical protrusion ring 54 engaging with the conical groove 44.

[0045] In a further embodiment of this utility model, the other end of the rear end cap 23 extends into or through the front cylinder 12.

[0046] In a further embodiment of the present invention, the front cylindrical body 12 includes a front straight cylindrical part 61 and an outer extension part 62. One side of the outer extension part 62 has a front retaining ring 63, and the other side of the outer extension part 63 has a tapered protruding ring 54. A front ring groove 51 is formed between the front retaining ring 63 and the front straight cylindrical part 61.

[0047] In a further embodiment of the present invention, the rear cylindrical body 23 includes a rear straight cylindrical part 71 and an inner extended end cap part 72. One end of the rear straight cylindrical part 71 has a tapered groove 44, and the other end of the rear straight cylindrical part 71 is connected to the outer periphery of the inner extended end cap part 72. The inner extended end cap part 72 has a rear annular groove 41.

[0048] The rear filter element 21 of this utility model is individually fused together and bonded to the rear cylinder 22 and the rear end cap 23 with hot melt adhesive, and then fused together to give the rear assembly sufficient pressure resistance; the front filter element 11 is bonded to the front cylinder 12 and the front end cap 13 with hot melt adhesive.

[0049] The problem of cross-contamination between the pre-filter and post-filter channels after the filter bottle is pressurized, leading to functional failure, has been solved. The pre-filter and post-filter are separated by a swirl mechanism, each bearing its own pressure, thus ensuring the overall sealing of the structure. Furthermore, the complexity of installation and manufacturing has been reduced, enabling better finished product manufacturing.

[0050] In a further embodiment of this utility model, one end of the housing 1 is provided with a front inlet 81, a front outlet 82, a rear inlet 83, and a rear outlet 84. The first cavity 31 is connected to the front water inlet through the front inlet 81, the second cavity 32 is connected to the front water outlet through the front outlet 82, the third cavity 33 is connected to the rear water inlet through the rear inlet 83, and the fourth cavity 34 is connected to the rear water outlet through the rear outlet 84.

[0051] In a further embodiment of this utility model, an unlocking component 2 is provided at the other end of the housing 1. The fixing and unlocking device of the housing 1 of the pre- and post-container composite filter element of this utility model is located at the front end, and the inlet and outlet are at the rear end, which facilitates user-friendly filter replacement, saving time and effort, and solves the problem of numerous parts and easy failure caused by the transfer of fixing and unlocking functions in existing products on the market.

[0052] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre- and post-filter composite element, characterized in that, Includes: a housing, and a pre-filter, a pre-cylinder, a pre-end cap, a post-filter, a post-cylinder, and a post-end cap disposed within the housing; The two ends of the rear filter element are respectively connected to the rear cylinder and the rear end cap; The two ends of the pre-filter are respectively connected to the pre-filter body and the pre-filter end cap; A first cavity is formed between the outer wall of the pre-filter and the inner wall of the housing; A second cavity is formed between the inner wall of the pre-filter and the outer wall of the pre-filter body; A third cavity is formed between the inner wall of the rear cylinder, the inner wall of the front cylinder, the outer wall of the rear filter element, and the outer wall of the rear end cap; A fourth cavity is formed between the inner wall of the rear filter element and the inner wall of the rear end cap; The first cavity is connected to the pre-water inlet, the second cavity is connected to the pre-water outlet, the third cavity is connected to the rear water inlet, and the fourth cavity is connected to the rear water outlet.

2. The pre- and post-filter composite element according to claim 1, characterized in that, The end of the rear cylinder abuts against the end of the front cylinder.

3. The pre- and post-filter composite element according to claim 1, characterized in that, The rear cylindrical body is a one-piece structure.

4. The pre- and post-filter composite element according to claim 1, characterized in that, The bottom of the rear cylinder has a rear ring groove, one end of the rear filter element is engaged in the rear ring groove, one end of the rear end cap has a rear inner ring and a rear outer ring, and the other end of the rear filter element is engaged between the rear inner ring and the rear outer ring.

5. The pre- and post-filter composite element according to claim 4, characterized in that, One end of the front cylinder has a front ring groove, one end of the front filter element is engaged in the front ring groove, the rear end cover has a front inner ring and a front outer ring, and the other end of the front filter element is engaged between the front inner ring and the front outer ring.

6. The pre- and post-filter composite element according to claim 5, characterized in that, One end of the front cylinder has a conical protrusion ring, and one end of the rear cylinder has a conical groove, with the conical protrusion ring engaging with the conical groove.

7. The pre- and post-filter composite element according to claim 6, characterized in that, The other end of the rear end cap extends into or through the front cylinder.

8. The pre- and post-filter composite element according to claim 7, characterized in that, The front cylindrical body includes a front straight cylindrical part and an outer extension part. One side of the outer extension part has a front retaining ring, and the other side of the outer extension part has the tapered convex ring. The front retaining ring and the front straight cylindrical part form the front ring groove. The rear cylindrical body includes a rear straight cylindrical section and an inner extended end cap section. One end of the rear straight cylindrical section has the conical groove, and the other end of the rear straight cylindrical section is connected to the outer periphery of the inner extended end cap section. The inner extended end cap section has the rear annular groove.

9. The pre- and post-filter composite element according to claim 1, characterized in that, One end of the housing is provided with a front inlet, a front outlet, a rear inlet, and a rear outlet. The first cavity is connected to the front water inlet through the front inlet, the second cavity is connected to the front water outlet through the front outlet, the third cavity is connected to the rear water inlet through the rear inlet, and the fourth cavity is connected to the rear water outlet through the rear outlet.

10. The pre- and post-filter composite element according to claim 1, characterized in that, The other end of the housing is provided with an unlocking component.

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