Composite filter element and water purifier applying same

Abstract

The utility model relates to a composite filter element and a water purifier applying the composite filter element, and the composite filter element comprises a shell, a first water inlet, a second water inlet, a first filter element and a second filter element, the front filter element is arranged in the shell, and the water inlet end of the front filter element is in fluid communication with the first water inlet; the fine filter element is arranged in the shell and is positioned at the downstream of the front filter element; the booster pump is arranged between the water outlet end of the front filter element and the water inlet end of the fine filter element; the water purifier is characterized in that a spacer used for enabling the front filter element and the fine filter element to be arranged at an interval is further arranged in the shell, a water outlet and a second water inlet are formed in the shell, the first water outlet is in fluid communication with the water outlet end of the front filter element, and the second water inlet is in fluid communication with the water inlet end of the fine filter element; the water outlet and the second water inlet are in fluid communication through a pipeline, and the booster pump is arranged on the pipeline. The booster pump has the advantages that the composite filter element facilitates installation of the booster pump and is small in size.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, and in particular to a composite filter element and a water purifier using the composite filter element. Background Art

[0002] Most water purifiers in the prior art are equipped with a pre-filter, a reverse osmosis filter and a post-filter. In order to pressurize the water to ensure that the water passes through the reverse osmosis filter, a booster pump is also provided between the pre-filter and the reverse osmosis filter. For example, a Chinese utility model patent with patent number ZL 202320346540.X (authorization announcement number CN219620898 U) discloses a water purifier with a new control system, including a controller and a pre-filter, a booster pump, a reverse osmosis filter and a post-filter connected in sequence.

[0003] The above-mentioned water purifier is formed by connecting the common single-stage filter elements in series, so the volume of the above-mentioned water purifier is large. In order to reduce the volume of the water purifier, a composite filter element has appeared in the prior art. For example, the Chinese utility model patent with patent number ZL 202321945356.3 (authorization announcement number CN 220676979U) discloses a composite filter element for a water purifier. The composite filter element for the water purifier includes a filter element barrel, the filter element barrel includes a filter element body and a filter element upper cover fixedly connected to the filter element body, the filter element body is provided with a first filter layer and a slow flow portion connected to the first filter layer, the filter element upper cover is provided with a second filter layer, and the first filter layer is connected to the second filter layer. Although the above-mentioned composite filter element can reduce the volume of the water purifier by concentrating the first filter layer and the second filter layer in the same filter element barrel; however, the above-mentioned composite filter element installation method is difficult to realize the installation of a booster pump between the pre-filter element and the reverse osmosis filter element. For this reason, further improvements to the prior art are needed. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a composite filter element which is small in size and convenient for installation on a booster pump in view of the above-mentioned prior art.

[0005] The second technical problem to be solved by the present invention is to provide a water purifier using the above-mentioned composite filter element in view of the above-mentioned prior art.

[0006] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a composite filter element, comprising:

[0007] A shell body, which is hollow inside and has a first water inlet;

[0008] A pre-filter element is disposed inside the housing, and a water inlet end of the pre-filter element is fluidically connected to the first water inlet;

[0009] A fine filter element is disposed inside the housing and is located downstream of the pre-filter element along the fluid flow path;

[0010] A booster pump is provided between the water outlet of the pre-filter element and the water inlet of the fine filter element;

[0011] It is characterized in that: the interior of the shell is also provided with a spacer for arranging the pre-filter element and the fine filter element at intervals, the shell is provided with a water outlet and a second water inlet, the water outlet is fluidly connected with the water outlet end of the pre-filter element, the second water inlet is fluidly connected with the water inlet end of the fine filter element, the water outlet and the second water inlet are fluidly connected through a pipeline, and the booster pump is arranged on the pipeline.

[0012] In order to achieve a better water treatment effect, a post-filter element is provided inside the shell along the fluid flow path and is located downstream of the fine filter element. The shell is also provided with a clean water outlet that is fluidically connected to the water outlet end of the post-filter element.

[0013] In order to facilitate the installation of the water channel, the first water inlet, the water outlet, the second water inlet and the clean water outlet are all arranged at the first end of the shell, and the second end of the shell is a closed end.

[0014] Preferably, the first water inlet, the clean water outlet, the second water inlet and the water outlet are arranged in sequence side by side along the first end of the shell.

[0015] In order to improve space utilization and make the volume of the composite filter element smaller, the post-filter element is arranged inside the fine filter element, and the fine filter element is arranged inside the pre-filter element.

[0016] Preferably, the post-filter element, the fine filter element and the pre-filter element are all tubular, and the axes of the post-filter element, the fine filter element and the pre-filter element are parallel or coincident.

[0017] Preferably, the spacer is tubular, and is disposed between the pre-filter element and the fine filter element, and a water passage is formed between the spacer and the pre-filter element and the fine filter element, respectively.

[0018] Preferably, the fine filter element comprises a central tube with an opening on its tube wall and a rolled membrane wound on the central tube, and the post-filter element is arranged inside the central tube.

[0019] Preferably, the fine filter element has a concentrated water drainage end, and the housing is also provided with a concentrated water outlet fluidly connected to the concentrated water drainage end of the fine filter element.

[0020] Preferably, the fine filter element is a reverse osmosis membrane filter element.

[0021] The technical solution adopted by the utility model to solve the second technical problem is: a water purifier, characterized in that: the composite filter element as mentioned above is applied.

[0022] Compared with the prior art, the utility model has the advantages that: by providing a water outlet and a second water inlet on the shell, and the first water outlet is fluidly connected to the water outlet end of the pre-filter element, the second water inlet is fluidly connected to the water inlet end of the fine filter element, and the water outlet and the second water inlet are fluidly connected through a pipeline. Therefore, on the one hand, the composite filter element can realize pressurization of the fine filter element by arranging the booster pump on the pipeline, and it is convenient to install the booster pump; on the other hand, since the booster pump is arranged at the water outlet end of the pre-filter element and the water inlet end of the fine filter element, it can prevent the booster pump from being blocked and improve the service life of the booster pump. In addition, the composite filter element has a small volume and high space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the composite filter element in the embodiment of the utility model;

[0024] Figure 2 for Figure 1 A cross-sectional view of

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 This is a water circuit diagram of a water purifier in an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 4 As shown, this embodiment discloses a composite filter element and a water purifier using the composite filter element, wherein the composite filter element comprises a housing 1, a pre-filter element 2, a fine filter element 3 and a post-filter element 4.

[0029] The shell 1 is hollow inside and is provided with a first water inlet 1a, a water outlet 1b, a second water inlet 1c and a purified water outlet 1d. Figure 2 As shown, the housing 1 in this embodiment is tubular. To facilitate waterway installation, the first water inlet 1a, the water outlet 1b, the second water inlet 1c and the clean water outlet 1d are all arranged at the first end 11 of the housing 1, and the second end 12 of the housing 1 is a closed end; and the first water inlet 1a, the clean water outlet 1d, the second water inlet 1c and the water outlet 1b are all arranged side by side in sequence along the first end 11 of the housing 1. Figure 4 As shown, the purified water outlet 1d is externally connected to a purified water pipe 82.

[0030] The pre-filter element 2 and the fine filter element 3 are both arranged inside the housing 1, and the water inlet end of the pre-filter element 2 is fluidically connected to the first water inlet 1a; and along the fluid flow path, the fine filter element 3 is located downstream of the pre-filter element 2; the post-filter element 4 is located downstream of the fine filter element 3, and the clean water outlet 1d is fluidically connected to the water outlet end of the post-filter element 4. In order to make full use of the space inside the housing 1, the post-filter element 4 in this embodiment is arranged inside the fine filter element 3, and the fine filter element 3 is arranged inside the pre-filter element 2; preferably, the post-filter element 4, the fine filter element 3 and the pre-filter element 2 are all tubular, and the axes of the post-filter element 4, the fine filter element 3 and the pre-filter element 2 are parallel or coincident. The post-filter element 4, the fine filter element 3 and the pre-filter element 2 in this embodiment are existing technologies in water purifiers and will not be elaborated here.

[0031] The interior of the shell 1 is also provided with an end cover 13 for installing the pre-filter element 2 and the fine filter element 3 at a position adjacent to the first end 11 thereof, and the end cover 13 is provided with a plurality of annular bodies 131 arranged in sequence inside and outside with intervals, and an installation space for installing the pre-filter element 2 or the fine filter element 3 is formed between two adjacent annular bodies 131.

[0032] like Figure 2 and Figure 3 As shown, the fine filter element 3 in this embodiment includes a central tube 31 with an opening 30 on its tube wall and a roll membrane 32 wound on the central tube 31, and the post filter element 4 is arranged inside the central tube 31; in this embodiment, the fine filter element 3 is a reverse osmosis membrane filter element, and the fine filter element 3 has a concentrated water drainage end, and the concentrated water drainage end of the fine filter element 3 is fluidically connected to the concentrated water outlet 1e, as shown in FIG. Figure 4 As shown, the concentrated water outlet 1e is externally connected to a waste water pipe 81, and a waste water valve 9 is provided on the waste water pipe 81.

[0033] The housing 1 is further provided with a spacer 7 for spacing the pre-filter element 2 and the fine filter element 3. The first water outlet 1b is fluidly connected to the water outlet end of the pre-filter element 2, and the second water inlet 1c is fluidly connected to the water inlet end of the fine filter element 3. Figure 4 As shown, the water outlet 1b and the second water inlet 1c are fluidically connected via a pipe 5, and a booster pump 6 is provided on the pipe 5; Figure 2 As shown, the spacer 7 is tubular, and is disposed between the pre-filter element 2 and the fine filter element 3 , and a water passage 70 is formed between the spacer 7 and the pre-filter element 2 and the fine filter element 3 , respectively.

[0034] like Figure 4 As shown, the working process of the water purifier in this embodiment is:

[0035] The raw water (usually tap water) entering from the first water inlet 1a is preliminarily filtered through the pre-filter element 2, and flows into the pipe 5 through the water outlet 1b, and then enters the housing 1 from the second water inlet 1c through the booster pump 6 on the pipe 5. However, the water entering from the second water inlet 1c is filtered through the fine filter element 3 and the post-filter element 4 in turn and flows out as clean water, which flows out through the clean water outlet 1d; and the concentrated water of the fine filter element 3 is discharged through the concentrated water outlet 1e.

[0036] The "fluid communication" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A composite filter element, comprising: The shell (1) is hollow inside, and a first water inlet (1a) is provided on the shell (1); A pre-filter element (2) is arranged inside the housing (1), and a water inlet end of the pre-filter element (2) is fluidically connected to the first water inlet (1a); A fine filter element (3) is arranged inside the housing (1), and along the fluid flow path, the fine filter element (3) is located downstream of the pre-filter element (2); A booster pump (6) is disposed between the water outlet of the pre-filter element (2) and the water inlet of the fine filter element (3); The invention is characterized in that: a spacer (7) for spacing the pre-filter element (2) and the fine filter element (3) is also provided inside the housing (1); a water outlet (1b) and a second water inlet (1c) are provided on the housing (1); the water outlet (1b) is fluidically connected to the water outlet end of the pre-filter element (2); the second water inlet (1c) is fluidically connected to the water inlet end of the fine filter element (3); the water outlet (1b) and the second water inlet (1c) are fluidically connected via a pipe (5); and the booster pump (6) is provided on the pipe (5).

2. The composite filter element according to claim 1, characterized in that: Along the fluid flow path, a post-filter element (4) is also provided inside the housing (1) and is located downstream of the fine filter element (3). The housing (1) is also provided with a clean water outlet (1d) that is fluidically connected to the water outlet end of the post-filter element (4).

3. The composite filter element according to claim 2, characterized in that: The first water inlet (1a), the water outlet (1b), the second water inlet (1c) and the clean water outlet (1d) are all arranged at the first end (11) of the shell (1), and the second end (12) of the shell (1) is a closed end.

4. The composite filter element according to claim 3, characterized in that: The first water inlet (1a), the clean water outlet (1d), the second water inlet (1c) and the water outlet (1b) are all arranged in sequence and side by side along the first end (11) of the shell (1).

5. The composite filter element according to any one of claims 2 to 4, characterized in that: The post-filter element (4) is arranged inside the fine filter element (3), and the fine filter element (3) is arranged inside the pre-filter element (2).

6. The composite filter element according to claim 5, characterized in that: The post-filter element (4), the fine filter element (3) and the pre-filter element (2) are all tubular, and the axes of the post-filter element (4), the fine filter element (3) and the pre-filter element (2) are parallel or coincident.

7. The composite filter element according to claim 6, characterized in that: The spacer (7) is tubular and is disposed between the pre-filter element (2) and the fine filter element (3), and a water passage is formed between the spacer (7) and the pre-filter element (2) and the fine filter element (3).

8. The composite filter element according to claim 5, characterized in that: The fine filter element (3) comprises a central tube (31) having an opening (30) on its tube wall and a rolled membrane (32) wound on the central tube (31), and the post-filter element (4) is arranged inside the central tube (31).

9. The composite filter element according to claim 8, characterized in that: The fine filter element (3) has a concentrated water drainage end, and the housing (1) is also provided with a concentrated water outlet (1e) which is fluidically connected to the concentrated water drainage end of the fine filter element (3).

10. The composite filter element according to claim 9, characterized in that: The fine filter element (3) is a reverse osmosis membrane filter element.

11. A water purifier, characterized in that: The composite filter element is applied as described in any one of claims 1 to 10.

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