Filter element structure for water purifier and water purifier

Abstract

The utility model relates to a filter element structure for a water purifier and the water purifier, the filter element structure comprises a filter bottle, the filter bottle is provided with a raw water inlet, a purified water outlet and a concentrated water outlet; the filter element assembly is arranged in the filter bottle, the filter element assembly comprises a front filter element, a central pipe and a rear filter element, the central pipe is sleeved with the front filter element, and a water inlet hole is formed in the peripheral wall of the central pipe; the rear filter element is in a rod shape and is inserted into the central pipe, the central part of the rear filter element is provided with a water passing channel which vertically extends, and the lower end of the water passing channel is correspondingly communicated with the purified water outlet. According to the utility model, the rear filter element is arranged in the central pipe, so that the space in the central pipe is fully utilized, and compared with a structure in which all the filter membranes are sequentially sleeved outside the central pipe, the filter element structure disclosed by the utility model is relatively small in overall size and convenient to mount in the water purifier.

Description

Technical Field

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

[0002] In order to ensure the purity of purified water, a water purification filter element with a multi-stage purification function is generally used in the prior art to remove particulate matter and floccules as well as heavy metals and organic compounds in the water to be purified, and the filter element can also improve the taste of the purified water. For example, in the Chinese utility model patent disclosed in the patent number CN202321239659.3 (publication number CN219792617U), a water purification filter element using an RO membrane roll is described. The shell includes an upper cover assembly, a cylinder and a base connected in sequence from top to bottom; the upper cover assembly includes a first shunt pipe, a second shunt pipe and a third shunt pipe; the RO membrane roll includes a sealing membrane, a front composite carbon fiber membrane, an RO membrane, a rear carbon fiber membrane and a central tube; the central tube is provided with a plurality of water inlet holes; the top end of the central tube is connected to the bottom end of the third shunt pipe to output purified water; the rear carbon fiber membrane, the RO membrane, the front composite carbon fiber membrane and the sealing membrane are connected end to end in sequence and are wound from the inside to the outside on the outer peripheral surface of the central tube, and the rear carbon fiber membrane covers all the water inlet holes; the bottom of the second shunt pipe wraps the outer periphery of the top of the RO membrane roll; the sealing membrane is provided with a plurality of water inlet holes, the plurality of water inlet holes are arranged at intervals and penetrate the sealing membrane, and part of the front composite carbon fiber membrane is exposed at the water inlet hole.

[0003] However, the filter membranes of the RO membrane roll are all arranged outside the central tube, and the space inside the central tube is not fully utilized, resulting in a larger volume of the RO membrane roll and, in turn, a larger volume of the filter element. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a small-volume filter element structure for a water purifier in view of the current status of the prior art.

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

[0006] The utility model solves the above-mentioned first technical problem by adopting the following technical solution: a filter element structure for a water purifier, comprising:

[0007] A filter bottle, wherein the filter bottle is provided with a raw water inlet, a clean water outlet and a concentrated water outlet;

[0008] A filter element assembly is arranged in the filter bottle, and the filter element assembly comprises a pre-filter element, a central tube and a post-filter element, the pre-filter element is sleeved on the central tube, and a water inlet hole is opened on the peripheral wall of the central tube;

[0009] It is characterized in that the post-filter element is in the shape of a rod and is inserted in the central tube, the central part of the post-filter element has a vertically extending water passage, and the lower end of the water passage is connected to the clean water outlet accordingly.

[0010] In order to prevent water from leaking between the central tube and the post-filter element, causing the water to flow out without passing through the post-filter element, end caps are fixedly provided at both ends of the post-filter element, and a first sealing ring is provided between the end caps and the central tube. In this way, after the water flows out from the water inlet hole of the central tube, it will definitely pass through the post-filter element and then flow out from the water passage of the post-filter element.

[0011] In the above scheme, the pre-filter element includes ultrafiltration membrane filaments and reverse osmosis membrane. The reverse osmosis membrane is cylindrical. The ultrafiltration membrane filaments are arranged around the outer periphery of the reverse osmosis membrane, and the water outlet of the ultrafiltration membrane filaments is located at the top thereof, which has a good filtering effect on raw water.

[0012] In order to prevent loose connection between components, displacement and affecting the water purification effect, the upper part of the ultrafiltration membrane filament and the upper part of the reverse osmosis membrane are fixedly connected by adhesive, and the upper part of the central tube and the upper part of the reverse osmosis membrane are fixedly connected by adhesive.

[0013] In order to facilitate the installation of the filter element assembly in the filter bottle, the filter bottle includes a bottle body with an open top and a bottle cap detachably covered on the top of the bottle body, and the bottle body and the bottle cap together enclose an installation space for the filter element assembly to be installed. After removing the bottle cap, the filter element assembly is installed in the bottle body, and then the bottle cap is installed on the bottle body. When disassembling, the bottle cap is removed to take out the filter element assembly.

[0014] In order to enable the bottle body and the bottle cap to be detachably connected, the bottle body and the bottle cap are threadedly connected.

[0015] Preferably, the outer peripheral wall of the bottle cap is provided with reinforcing ribs, and there are at least two reinforcing ribs arranged at intervals along the circumference of the bottle cap, and each reinforcing rib extends vertically. The reinforcing ribs not only improve the strength of the bottle cap, but also facilitate the user to apply force to the bottle cap and rotate the bottle cap to remove or install the bottle cap.

[0016] In order to position the central tube, an annular body is provided at the bottom of the bottle body and is arranged around the outer periphery of the clean water outlet. The lower end of the central tube is inserted into the annular body, and the top of the central tube is abutted against the bottle cap. The annular body plays a role in positioning the central tube, and a second sealing ring is provided between the central tube and the annular body to prevent water from leaking out from between the central tube and the annular body and not flowing out from the clean water outlet.

[0017] In order to position the post-filter element in the central tube, a partition is transversely arranged in the central tube, the partition is located at the upper part of the central tube, the water inlet is arranged on the peripheral wall of the central tube below the partition, the lower end of the post-filter element abuts against the bottom wall of the bottle body, and the upper end of the post-filter element abuts against the partition. The partition limits the upward movement of the post-filter element, and the bottom wall of the filter bottle limits the downward movement of the post-filter element.

[0018] The technical solution adopted by the utility model to solve the above second technical problem is: a water purifier, characterized in that it includes the above filter element structure.

[0019] Compared with the prior art, the utility model has the following advantages: the utility model fully utilizes the space in the central tube by arranging the post-filter element in the central tube. Compared with the structure in which all filter membranes are sequentially mounted on the outside of the central tube, the filter element structure of the utility model has a smaller overall volume and is convenient for installation in a water purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the filter element according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the decomposition of

[0022] Figure 3 for Figure 1 A cross-sectional view of the bottle with the cap removed. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 3 As shown, the filter element structure for a water purifier in this preferred embodiment includes a filter bottle 1 and a filter element assembly.

[0025] The filter bottle 1 is provided with a raw water inlet 11 , a clean water outlet 12 and a concentrated water outlet 13 . The raw water inlet 11 is arranged on the peripheral wall of the filter bottle 1 , and the clean water outlet 12 and the concentrated water outlet 13 are both arranged on the bottom wall of the filter bottle 1 .

[0026] The filter element assembly is arranged in the filter bottle 1, and the filter element assembly includes a pre-filter element, a central tube 2 and a post-filter element 3. The pre-filter element is mounted on the central tube 2. A water inlet hole 21 is opened on the peripheral wall of the central tube 2. The post-filter element 3 is rod-shaped and inserted in the central tube 2. The central part of the post-filter element 3 has a vertically extending water passage 31, and the lower end of the water passage 31 is connected to the clean water outlet 12 accordingly.

[0027] In this embodiment, the post-filter element 3 is a carbon rod, and the pre-filter element includes an ultrafiltration membrane filament 4 (which can be purchased from Ningbo Dukang Ceramics Co., Ltd.) and a reverse osmosis membrane 5. The reverse osmosis membrane 5 is cylindrical, and the ultrafiltration membrane filament 4 is arranged around the outer periphery of the reverse osmosis membrane 5, and the water outlet of the ultrafiltration membrane filament 4 is located at the top thereof. The upper part of the ultrafiltration membrane filament 4 and the upper part of the reverse osmosis membrane 5 are fixedly connected by an adhesive such as epoxy resin, and the upper part of the central tube 2 and the upper part of the reverse osmosis membrane 5 are fixedly connected by an adhesive such as epoxy resin.

[0028] End caps 32 are fixedly provided at both ends of the post-filter element 3, and first sealing rings 33 are provided between the end caps 32 and the center tube 2. In this way, after water flows out from the water inlet 21 of the center tube 2, it will definitely pass through the post-filter element 3, and then flow out from the water passage 31 of the post-filter element 3. The end caps 32 are fixedly connected to the post-filter element 3, for example, the end caps 32 and the post-filter element 3 are connected by hot melt adhesive to prevent water leakage.

[0029] The filter bottle 1 comprises a bottle body 14 with an open top and a bottle cap 15 detachably covered on the top of the bottle body 14. The bottle body 14 and the bottle cap 15 together form an installation space in which the filter element assembly can be installed. After removing the bottle cap 15, the filter element assembly is installed in the bottle body 14, and then the bottle cap 15 is installed on the bottle body 14. When disassembling, the bottle cap 15 is removed to remove the filter element assembly.

[0030] In this embodiment, an external thread 141 is provided on the outer peripheral wall of the top of the bottle body 14, and an internal thread 151 is provided on the inner peripheral wall of the bottle cap 15, so that the bottle body 14 and the bottle cap 15 are threadedly connected, and a third sealing ring 16 is provided between the filter bottle 1 and the bottle cap 15. A reinforcing rib 152 is provided on the outer peripheral wall of the bottle cap 15, and there are at least two reinforcing ribs 152 and they are arranged at intervals along the circumference of the bottle cap 15, and each reinforcing rib 152 extends vertically. The reinforcing rib 152 not only improves the strength of the bottle cap 15, but also facilitates the user to apply force to the bottle cap 15 and rotate the bottle cap 15 to remove or install the bottle cap 15.

[0031] An annular body 142 is provided at the bottom of the bottle body 14 and is arranged around the outer periphery of the clean water outlet 12. The lower end of the central tube 2 is inserted into the annular body 142. The annular body 142 serves to position the central tube 2. A second sealing ring 22 is provided between the central tube 2 and the annular body 142 to prevent water from leaking out from between the central tube 2 and the annular body 142 and not flowing out from the clean water outlet 12.

[0032] The top of the central tube 2 abuts against the bottle cap 15, a partition 23 is transversely arranged in the central tube 2, the partition 23 is located at the upper part of the central tube 2, the water inlet 21 is arranged on the peripheral wall of the central tube 2 located below the partition 23, the lower end of the post filter element 3 abuts against the bottom wall of the bottle body 14, and the end cap 32 at the top of the post filter element 3 abuts against the partition 23. The partition 23 limits the upward movement of the post filter element 3, and the bottom wall of the filter bottle 1 limits the downward movement of the post filter element 3.

[0033] The water flow path of this embodiment is as follows Figure 3 As shown by the arrow in the figure, it first passes through the ultrafiltration membrane filament 4, then flows out from the water outlet of the ultrafiltration membrane filament 4, enters the reverse osmosis filter membrane 5, and then passes through the water inlet hole 21 of the central tube 2 and the water passage 31 of the post-filter element 3 in sequence, and finally flows out from the clean water outlet 12.

[0034] The filter element structure is applied to a water purifier.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[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 filter element structure for a water purifier, comprising: A filter bottle (1), wherein the filter bottle (1) is provided with a raw water inlet (11), a clean water outlet (12) and a concentrated water outlet (13); A filter element assembly is arranged in a filter bottle (1), the filter element assembly comprising a pre-filter element, a central tube (2) and a post-filter element (3), the pre-filter element is sleeved on the central tube (2), and a water inlet hole (21) is provided on the peripheral wall of the central tube (2); It is characterized in that The post-filter element (3) is in the shape of a rod and is inserted into the central tube (2). The central portion of the post-filter element (3) has a vertically extending water passage (31), and the lower end of the water passage (31) is correspondingly connected to the clean water outlet (12).

2. The filter element structure according to claim 1, characterized in that: End covers (32) are fixedly provided at both ends of the post-filter element (3), and a first sealing ring (33) is provided between the end cover (32) and the central tube (2).

3. The filter element structure according to claim 1, characterized in that: The pre-filter element comprises an ultrafiltration membrane filament (4) and a reverse osmosis membrane (5), wherein the reverse osmosis membrane (5) is cylindrical, the ultrafiltration membrane filament (4) is arranged around the outer periphery of the reverse osmosis membrane (5), and the water outlet of the ultrafiltration membrane filament (4) is located at the top thereof.

4. The filter element structure according to claim 3, characterized in that: The upper part of the ultrafiltration membrane filament (4) and the upper part of the reverse osmosis membrane (5) are fixedly connected by an adhesive, and the upper part of the central tube (2) and the upper part of the reverse osmosis membrane (5) are fixedly connected by an adhesive.

5. The filter element structure according to any one of claims 1 to 4, characterized in that: The filter bottle (1) comprises a bottle body (14) with an open top and a bottle cover (15) detachably covered on the top of the bottle body (14); the bottle body (14) and the bottle cover (15) together enclose an installation space in which a filter element assembly can be installed.

6. The filter element structure according to claim 5, characterized in that: The bottle body (14) and the bottle cap (15) are threadedly connected.

7. The filter element structure according to claim 6, characterized in that: The outer peripheral wall of the bottle cap (15) is provided with reinforcing ribs (152), and there are at least two reinforcing ribs (152) which are arranged at intervals along the circumference of the bottle cap (15), and each reinforcing rib (152) extends vertically.

8. The filter element structure according to claim 5, characterized in that: The bottom of the bottle body (14) is provided with an annular body (142) surrounding the outer periphery of the purified water outlet (12); the lower end of the central tube (2) is inserted into the annular body (142); a second sealing ring (22) is provided between the central tube (2) and the annular body (142); and the top of the central tube (2) abuts against the bottle cap (15).

9. The filter element structure according to claim 5, characterized in that: A partition (23) is transversely arranged in the central tube (2), the partition (23) is located at the upper part of the central tube (2), the water inlet hole (21) is arranged on the peripheral wall of the central tube (2) below the partition (23), the lower end of the rear filter element (3) abuts against the bottom wall of the bottle body (14), and the top of the rear filter element (3) abuts against the partition (23).

10. A water purifier, characterized in that: The invention comprises the filter element structure as described in any one of claims 1 to 9.

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