Water filter

Abstract

A water purification filter element, comprising a filter housing, a central tube and filter membrane filaments arranged in the filter housing, wherein the filter membrane filaments are arranged around the central tube, and the central tube is characterized in that the central tube is axially hollow and forms a water inlet end at one end and a water outlet end at the other end, and an electric field generating mechanism is arranged in the central tube, and the electric field generating mechanism at least comprises a water flow generator, a first electrode plate and a second electrode plate, wherein the water flow generator is arranged near the water inlet end and the two poles of the power output are respectively connected to the first electrode plate and the second electrode plate, and the first electrode plate and the second electrode plate are both strip-shaped and arranged along the length direction of the central tube. The water flow is used to generate electricity and is integrated into the filter element, and when the water passes through the electric field, the elements rich in positive ions in the water are discharged from the filter element, and the ions rich in negative electricity are filtered through the filter membrane filaments and become purified water.

Description

Technical Field

[0001] The invention relates to a water purification device, and in particular to a water purification filter element which can be used for water purification. Background Art

[0002] The minerals in water have two sides. Water without minerals has no nutrition and is not recommended for long-term drinking, especially for the elderly and children. Excessive mineral content in water can easily cause sensory problems such as scaling when boiling water and poor taste, which will affect consumers' experience. In the water purifier industry, there are two mainstream water purification technologies: ultrafiltration and reverse osmosis. Although ultrafiltration can retain minerals, it cannot remove heavy metals such as lead, cadmium, mercury, and arsenic. Reverse osmosis can remove all elemental ions, but the water that comes out is pure water without any minerals.

[0003] Ordinary rolled nanofiltration membranes have a rated desalination rate, so during filtration, due to the rated interception rate, the minerals in the filtered water are all affected by the interception rate. For example: the rated interception rate of the nanofiltration membrane is 80%. If the raw water TDS is 100, the TDS of the purified water should be 20 after filtration through the nanofiltration membrane; if the raw water TDS is 1000, the TDS of the purified water should be 200 after filtration through the nanofiltration membrane; due to the large differences in water quality in various parts of China, there will be large differences in the mineral retention rate of the purified water after filtration in various places; in high hardness areas, excessive retention of minerals will cause scaling, poor taste and other problems.

[0004] On the basis of improving the performance of membrane fibers, how to remove excess minerals is still a research topic for technicians in this field. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a water purification filter element which uses an electric field to remove minerals in response to the above-mentioned technical status.

[0006] The second technical problem to be solved by the present invention is to provide a water purification filter element in which an electric field is built into a single filter element to achieve mineral removal in response to the above-mentioned technical status quo.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a water purification filter element, including a filter shell and a central tube and filter membrane filaments arranged in the filter shell, the aforementioned filter membrane filaments are arranged around the central tube, and the characteristic is that the central tube is axially hollow and forms a water inlet end at one end and a water outlet end at the other end. An electric field generating mechanism is arranged in the central tube, and the electric field generating mechanism at least includes a water flow generator, a first electrode plate and a second electrode plate. The aforementioned water flow generator is arranged near the water inlet end and the two poles of the power output are respectively connected to the aforementioned first electrode plate and the second electrode plate. The aforementioned first electrode plate and the second electrode plate are both strip-shaped and arranged along the length direction of the central tube.

[0008] Preferably, the electric field generating mechanism also includes a pole plate bracket, which is in the shape of an "I" because it includes an upper horizontal portion, a lower horizontal portion and a vertical portion located at the upper horizontal portion and the lower horizontal portion bracket. The water flow generator is located above the upper horizontal portion, and the first electrode plate and the second electrode plate are respectively located on both sides of the vertical portion.

[0009] Furthermore, the upper horizontal part and the lower horizontal part are in annular shape and fit with the inner wall of the central tube, and correspondingly, the first electrode plate and the second electrode plate are in arc shape and fit with the inner wall of the central tube. The arc design is conducive to expanding the electric field range and facilitating the removal of minerals.

[0010] Preferably, a radial water outlet hole or a water outlet gap is provided at the other end of the central tube.

[0011] The filter housing comprises a first end cover and an outer shell. The aforementioned first end cover is arranged on the port of the outer shell and has a water inlet port and a clean water port. The aforementioned outer shell has a wastewater port at the bottom. The filter membrane is arranged in the membrane shell. The membrane shell comprises a shell, a connecting sleeve and a second end cover. The aforementioned shell is provided with a wastewater outlet connected to the aforementioned wastewater port. The two ends of the aforementioned connecting sleeve are respectively sealed with the shell and the second end cover. The aforementioned second end cover has a water inlet. The water inlet is sealedly provided with a connecting pipe. The outer end of the connecting pipe is sealed with the water inlet port of the first end cover, and the inner end is sealed with the center pipe.

[0012] It can also be: the filter housing includes a first end cover and an outer shell, the aforementioned first end cover is arranged on the port of the outer shell and has a water inlet port and a clean water port, the aforementioned outer shell has a wastewater port at the bottom, the filter membrane is arranged in the membrane shell, the membrane shell includes a shell and a second end cover arranged at the shell port, the aforementioned shell is provided with a wastewater outlet connected to the aforementioned wastewater port, the aforementioned second end cover has a water inlet, and the water inlet is sealed with a connecting pipe, the outer end of the connecting pipe is sealedly connected to the water inlet port of the first end cover, and the inner end is sealedly connected to the center tube.

[0013] Compared with the prior art, the advantages of the present invention are: using water flow to generate electricity and integrating it into the filter element, when water passes through the electric field, the mineral ions in the water are all positively charged, so under the action of the electric field force, they will move toward the negative electrode, forming concentrated water rich in minerals in the negative electrode direction, and this part of concentrated water is discharged to achieve the purpose of reducing the TDS value of the raw water. The overall structure is compact, no additional energy consumption is required, and the trouble caused by line connection is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of Example 1.

[0015] Figure 2 for Figure 1 Exploded diagram of .

[0016] Figure 3 This is an enlarged three-dimensional cross-sectional view of Example 1.

[0017] Figure 4 for Figure 2 Enlarged exploded view of the electric field generating mechanism.

[0018] Figure 5 for Figure 2 Enlarged view of part A in the middle.

[0019] Figure 6 This is an enlarged view of the central tube in Example 2. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings.

[0021] Embodiment 1, as Figure 1 , Figure 2 and Figure 3 As shown, the water purification filter element in this embodiment includes a filter housing 1, a central tube 3 and filter membrane filaments 4 arranged in the filter housing 1, and an electric field generating mechanism 5 arranged in the central tube 3.

[0022] The filter housing 1 includes a first end cap 12 and an outer shell 11. The first end cap 12 is arranged on the port of the outer shell 11 and has a water inlet port 121 and a clean water port 122. A reinforcing ring 13 is also provided at the connection between the first end cap 12 and the outer shell. A wastewater port 111 is provided at the bottom of the outer shell 11. The filter membrane 4 is provided in the membrane filament housing 2. One end of the filter membrane filament 4 is integrated by a sealing layer 41. The membrane filament housing 2 includes a shell 21, a connecting sleeve 22 and a second end cap 23. A wastewater outlet connected to the wastewater port 111 is provided on the shell 21. Both ends of the connecting sleeve 22 are sealedly connected to the shell 21 and the second end cap 23 respectively. The second end cap 23 has a water inlet. A connecting pipe 6 is sealedly provided on the water inlet. The outer end of the connecting pipe 6 is sealedly connected to the water inlet port 121 of the first end cap 12, and the inner end is sealedly connected to the center pipe 3.

[0023] The central tube 3 is axially hollow and has a water inlet at one end and a water outlet notch 31 (such as Figure 5 As shown) to form a water outlet end.

[0024] The electric field generating mechanism 5 at least includes a water flow generator 51, a first electrode plate 52 and a second electrode plate 53. The water flow generator 51 is arranged near the water inlet end of the central tube and the two poles of the power output are respectively connected to the first electrode plate 52 and the second electrode plate 53. The first electrode plate 52 and the second electrode plate 53 are both strip-shaped and arranged along the length direction of the central tube 3.

[0025] Combination Figure 4As shown, the electric field generating mechanism 5 further includes a plate support 54, which is in the shape of an "I" because it includes an upper horizontal portion 541, a lower horizontal portion 542, and a vertical portion 543 located at the upper horizontal portion 541 and the lower horizontal portion 542 support. The water flow generator 51 is located above the upper horizontal portion 541, and the first electrode plate 52 and the second electrode plate 53 are respectively located on both sides of the vertical portion 543. The upper horizontal portion 541 and the lower horizontal portion 542 in this embodiment are in the shape of a circular ring and are adapted to the inner wall of the central tube 3. Correspondingly, the first electrode plate 52 and the second electrode plate 53 are in the shape of an arc and are adapted to the inner wall of the central tube 3.

[0026] When water enters, it first passes through the water flow generator. The water flow generator generates current under the action of water flow. The first electrode plate and the second electrode plate are connected to the positive pole and the negative pole respectively. An electric field is generated between the first electrode plate and the second electrode plate. After passing through the generator, the water flows into the electric field. Under the action of the electric field force, the ions in the water are separated. At the bottom of the central tube, the elements rich in positive ions are discharged from the filter element, while the ions rich in negative electricity are filtered through the filter membrane and become clean water.

[0027] Embodiment 2, as Figure 6 As shown, a radial water outlet hole 32 is provided at the other end of the central tube 3, and other structures refer to Example 1.

Claims

1. A water purification filter element, comprising a filter housing (1), a central tube (3) and a filter membrane (4) arranged in the filter housing (1), wherein the filter membrane (4) is arranged around the central tube (3), characterized in that The central tube (3) is axially hollow and has one end forming a water inlet end and the other end forming a water outlet end. An electric field generating mechanism (5) is provided inside the central tube (3). The electric field generating mechanism (5) comprises at least a water flow generator (51), a first electrode plate (52) and a second electrode plate (53). The water flow generator (51) is arranged near the water inlet end of the central tube and two poles of the power output are respectively connected to the first electrode plate (52) and the second electrode plate (53). The first electrode plate (52) and the second electrode plate (53) are both in strip shape and arranged along the length direction of the central tube (3). The electric field generating mechanism (5) further comprises a plate support (54), the plate support (54) being in the shape of an “I” due to comprising an upper horizontal portion (541), a lower horizontal portion (542) and a vertical portion (543) located between the upper horizontal portion (541) and the lower horizontal portion (542), the water flow generator (51) being located above the upper horizontal portion (541), and the first electrode plate (52) and the second electrode plate (53) being located on both sides of the vertical portion (543) respectively; The other end of the central tube (3) is provided with a radial water outlet hole (32) or a water outlet notch (31).

2. The water purification filter element according to claim 1, characterized in that The upper horizontal portion (541) and the lower horizontal portion (542) are in annular shapes and fit with the inner wall of the central tube (3); correspondingly, the first electrode plate (52) and the second electrode plate (53) are in arc shapes and fit with the inner wall of the central tube (3).

3. The water purification filter element according to claim 1, characterized in that The filter housing (1) comprises a first end cover (12) and an outer shell (11). The first end cover (12) is arranged on the port of the outer shell (11) and has a water inlet port (121) and a clean water port (122). The bottom of the outer shell (11) has a wastewater port (111). The filter membrane (4) is arranged in the membrane housing (2). The membrane housing (2) comprises a shell (21), a connecting sleeve (22) and a second end cover (23). The shell (21) is provided with a wastewater outlet connected to the wastewater port (111). The two ends of the connecting sleeve (22) are respectively sealed with the shell (21) and the second end cover (23). The second end cover (23) has a water inlet. The water inlet is sealed with a connecting pipe (6). The outer end of the connecting pipe (6) is sealed with the water inlet port (121) of the first end cover (12), and the inner end is sealed with the center pipe (3).

4. The water purification filter element according to claim 1, characterized in that The filter housing comprises a first end cover and an outer shell. The aforementioned first end cover is arranged on the port of the outer shell and has a water inlet port and a clean water port. The aforementioned outer shell has a wastewater port at the bottom. The filter membrane is arranged in the membrane shell. The membrane shell comprises a shell and a second end cover arranged at the shell port. The aforementioned shell is provided with a wastewater outlet connected to the aforementioned wastewater port. The aforementioned second end cover has a water inlet. A connecting pipe is sealed on the water inlet. The outer end of the connecting pipe is sealedly connected to the water inlet port of the first end cover, and the inner end is sealedly connected to the center tube.

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