Front and rear composite filter core structure

Abstract

This utility model discloses a pre- and post-filter composite structure, comprising: a filter housing; and a pre-filter section, the pre-filter section being disposed inside the filter housing. The pre-filter section includes a front lower end cover fixed inside the filter housing, and a pre-filter material is sleeved on the outer side of the front lower end cover. A water channel one is formed between the outer wall of the pre-filter material and the inner wall of the filter housing, and a water channel two is formed between the inner wall of the pre-filter material and the front lower end cover. The beneficial effects of this utility model are: by adjusting the internal structure and water channels of the filter, the pre-filter and the post-carbon rod filter are integrated into the same filter, with a single filter having multiple water channels and multiple filtration stages, reducing the frequency of filter replacement and also reducing the overall structural size of the machine, making the whole machine more compact and aesthetically pleasing.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a pre- and post-positioned composite filter structure. Background Technology

[0002] Existing water purifiers use single-element pre-filters or post-carbon filters, which suffer from limited functionality and frequent replacement. Each filter focuses on a specific function; for example, a pre-filter primarily removes large particles and sediment, while a post-carbon filter removes odors and improves the taste of the water. This separate design and installation limit the lifespan and functionality of each filter, requiring visits to different locations for processing and replacement. Utility Model Content

[0003] The purpose of this invention is to provide a pre- and post-positioned composite filter structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pre- and post-positioned composite filter structure, comprising:

[0005] Filter cartridge housing;

[0006] The pre-filter is located inside the filter element housing. The pre-filter includes a front lower end cover fixed inside the filter element cover. Pre-filter material is sleeved on the outside of the front lower end cover. A water channel one is formed between the outer wall of the pre-filter material and the inner wall of the filter element housing, and a water channel two is formed between the inner wall of the pre-filter material and the front lower end cover.

[0007] A post-filter section is located below the pre-filter section. The post-filter section includes a post-upper cover installed inside the pre-lower cover. There is a water channel three between the pre-lower cover and the post-upper cover. Post-filter media is installed at the bottom of the post-upper cover. The middle part of the post-filter media is connected to the middle part of the post-upper cover, and the middle part of the post-filter media and the middle part of the post-upper cover form a water channel four.

[0008] During filtration, water flows from water channel one through the pre-filter media into water channel two, then from the top of water channel two into water channel three, and from water channel three flows downward through the post-filter media into water channel four.

[0009] Preferably, a filter element cover is fixedly attached to the top of the filter element housing.

[0010] Preferably, the bottom of the filter element cover is fixedly connected to a front upper cover, the top of the front lower cover extends through the middle of the front upper cover and is connected to the filter element cover, and the pre-filter material is installed between the front upper cover and the front lower cover.

[0011] Preferably, a rear sleeve is installed at the bottom inside the filter cartridge cover, and a rear lower end cover is installed inside the rear sleeve. The bottom of the pre-filter material is connected to the top of the rear sleeve, and the rear filter material is installed between the rear upper end cover and the rear lower end cover.

[0012] Preferably, the top of the filter element cover is symmetrically provided with a front water inlet and a front water outlet, and the top of the filter element cover is also symmetrically provided with a rear water inlet and a rear water outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by adjusting the internal structure and water circuit of the filter element, the pre-filter element and the post-carbon rod filter element are integrated into the same filter element. The single filter element has a multi-stage water circuit and multi-stage filtration, which reduces the frequency of filter element replacement and also reduces the overall structural size of the machine, making the whole machine more compact and beautiful. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a distribution diagram of the inlet and outlet of this utility model;

[0017] Figure 4 This is a schematic diagram of the front lower end cover and the rear upper end cover of this utility model.

[0018] In the diagram: 1. Filter cartridge cover; 2. Front upper cover; 3. Pre-filter media; 4. Front lower cover; 5. Rear upper cover; 6. Rear filter media; 7. Rear sleeve; 8. Rear lower cover; 9. Filter cartridge housing; 10. Front inlet; 11. Front outlet; 12. Rear inlet; 13. Rear outlet. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 , 2As shown in Figures 3 and 4, this utility model provides a technical solution: a pre- and post-filter composite filter structure, comprising: a filter housing 9; a pre-filter section placed inside the filter housing 9, the pre-filter section including a front lower end cover 4 fixed inside the filter cover 1, a pre-filter material 3 sleeved on the outer side of the front lower end cover 4, a water channel one formed between the outer wall of the pre-filter material 3 and the inner wall of the filter housing 9, and a water channel two formed between the inner wall of the pre-filter material 3 and the front lower end cover 4; a post-filter section placed below the pre-filter section, the post-filter section including a rear upper end cover 5 installed inside the front lower end cover 4, a water channel three between the front lower end cover 4 and the rear upper end cover 5, a post-filter material 6 installed at the bottom of the rear upper end cover 5, the middle part of the post-filter material 6 communicating with the middle part of the rear upper end cover 5, and the middle part of the post-filter material 6 and the middle part of the rear upper end cover 5 forming a water channel four.

[0021] It should be noted that in this embodiment, the pre-filter media 3 performs coarse filtration of tap water or raw water, intercepting and removing residual chlorine, impurities, and large particles such as sediment. The pre-filter lower end cover 4 consists of a sealing ring and a pre-filter lower end cover, which is connected to the filter element cover assembly 1 through an interference fit of the sealing ring. The other end is fixedly connected to the pre-filter media 3 by hot melt adhesive. This mainly isolates the purified water from the raw water in the pre-filter, preventing cross-contamination between the pre-filter and post-filter water circuits. The post-filter upper end cover 5 consists of a sealing ring and a post-filter upper end cover, which is connected to the filter element cover assembly 1 through an interference fit of the sealing ring. The other end is fixedly connected to the pre-filter media 3 by hot melt adhesive. This mainly isolates the raw water from the post-filter. It is isolated from the post-purified water to achieve the separation of raw water before post-purification and purified water; the post-filter media 6 mainly performs secondary filtration of the water after coarse filtration, removes odors from the water and improves the taste of the water. During filtration, water passes through water passage 1 between the pre-filter media 3 and the filter element housing 9 and enters water passage 2 inside the pre-filter media 3. Then, water enters water passage 3 between the pre-filter lower end cover 4 and the post-filter upper end cover 5 from the top of water passage 2. Water flows down from water passage 3 to between the post-filter media 6 and the post-filter sleeve 7. Then, under water pressure, water passes through the post-filter media 6 and enters water passage 4 inside the post-filter media 6. Finally, the filtered water is discharged from the top through the inside of the post-filter upper end cover 5.

[0022] In one embodiment, a filter element cover 1 is fixedly connected to the top of the filter element housing 9. A front water inlet 10 and a front water outlet 11 are symmetrically arranged on the top of the filter element cover 1. A rear water inlet 12 and a rear water outlet 13 are also symmetrically arranged on the top of the filter element cover 1.

[0023] It should be noted that in this embodiment, the filter element cover 1 is mainly composed of a water stop valve and a filter element cover. It is fixedly connected to the filter element housing assembly 9 by spin welding to form a complete filter element. The internal part is fixedly connected to the front upper end cover 2, the front lower end cover 4 and the rear upper end cover 5 by the interference fit of the sealing ring, dividing the internal part of the filter element into four water channels to prevent internal water leakage. The front water inlet 10, the front water outlet 11, the rear water inlet 12 and the rear water outlet 13 are controlled by the corresponding water pipes and valves to control the corresponding water flow in and out.

[0024] In one embodiment, the bottom of the filter element cover 1 is fixedly connected to the front upper cover 2, the top of the front lower cover 4 extends through the middle of the front upper cover 2 and is connected to the filter element cover 1, and the pre-filter material 3 is installed between the front upper cover 2 and the front lower cover 4.

[0025] It should be noted that in this embodiment, the front upper cover 2 is composed of a sealing ring and a front upper cover. It is connected to the filter cover assembly 1 by the interference fit of the sealing ring, and the other end is fixedly connected to the pre-filter material 3 by hot melt adhesive. The main purpose is to separate the raw water and the purified water in the pre-filter so as to achieve the separation of the raw water before purification and the purified water.

[0026] In one embodiment, a rear sleeve 7 is installed at the bottom inside the filter element cover 1, and a rear lower end cover 8 is installed inside the rear sleeve 7. The bottom of the pre-filter material 3 is connected to the top of the rear sleeve 7, and the rear filter material 6 is installed between the rear upper end cover 5 and the rear lower end cover 8.

[0027] It should be noted that in this embodiment, the rear sleeve 7 is fixedly connected to the front lower end cover assembly 4 by spin welding, forming an independent cavity inside, which is the rear purification cavity, mainly used to isolate the rear water circuit from the front water circuit; the rear lower end cover 8 is fixedly connected to the rear filter material 6 by hot melt adhesive to prevent the water before and after purification from mixing.

[0028] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and 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.

[0029] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre- and post-positioned composite filter structure, characterized in that: include: Filter housing (9); The pre-filter is located inside the filter housing (9). The pre-filter includes a front lower end cover (4) fixed inside the filter cover (1). The front lower end cover (4) is fitted with a pre-filter material (3) on its outer side. A water channel one is formed between the outer wall of the pre-filter material (3) and the inner wall of the filter housing (9). A water channel two is formed between the inner wall of the pre-filter material (3) and the front lower end cover (4). The post-filter section is located below the pre-filter section. The post-filter section includes a rear upper cover (5) installed inside the front lower cover (4). There is a water channel three between the front lower cover (4) and the rear upper cover (5). A post-filter media (6) is installed at the bottom of the rear upper cover (5). The middle part of the post-filter media (6) is connected to the middle part of the rear upper cover (5). The middle part of the post-filter media (6) and the middle part of the rear upper cover (5) form a water channel four. During filtration, water enters water path 2 through the pre-filter media (3) from water path 1, then enters water path 3 from the top of water path 2, and flows down from water path 3 through the post-filter media (6) into water path 4.

2. The pre- and post-positioned composite filter structure according to claim 1, characterized in that: The filter element housing (9) is fixedly connected to the top of the filter element cover (1).

3. The pre- and post-positioned composite filter structure according to claim 2, characterized in that: The bottom of the filter element cover (1) is fixedly connected to the front upper end cover (2), the top of the front lower end cover (4) extends out from the middle of the front upper end cover (2) and is connected to the filter element cover (1), and the pre-filter material (3) is installed between the front upper end cover (2) and the front lower end cover (4).

4. The pre- and post-positioned composite filter structure according to claim 3, characterized in that: The bottom of the filter element cover (1) is equipped with a rear sleeve (7), and the rear sleeve (7) is equipped with a rear lower end cover (8). The bottom of the front filter material (3) is connected to the top of the rear sleeve (7), and the rear filter material (6) is installed between the rear upper end cover (5) and the rear lower end cover (8).

5. The pre- and post-positioned composite filter structure according to claim 2, characterized in that: The top of the filter element cover (1) is symmetrically provided with a front water inlet (10) and a front water outlet (11), and the top of the filter element cover (1) is symmetrically provided with a rear water inlet (12) and a rear water outlet (13).

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