A filter bottle structure based on an electric adsorption filter element

Abstract

The application discloses a filter bottle structure based on an electric adsorption filter element, which comprises a cylindrical filter bottle shell, an electric adsorption filter element in the filter bottle shell, a filter bottle front end cover and a filter bottle rear end cover at both ends of the filter bottle shell, and the filter element is fixed and packaged in the inner cavity of the filter bottle shell; the filter bottle rear end cover is provided with a water inlet port, a water outlet port and at least two electric connection heads; the inner cavity of the filter bottle shell is approximately cylindrical, the inner diameter of the filter bottle rear end cover is larger than that of the filter bottle front end cover; and the axial section of the inner wall of the filter bottle shell is a smooth straight line or curve, so that the inner diameter of the inner cavity of the filter bottle shell gradually changes. According to the technical scheme, the bubbles move to the filter bottle rear end cover, enter the water channel through the water outlet port and are discharged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water purification, and particularly relates to a filter bottle structure based on an electrosorption filter element. BACKGROUND

[0002] Traditional water purification devices mainly use RO, i.e., reverse osmosis membranes, to purify tap water to produce pure water that can be directly drunk. Reverse osmosis membranes can effectively prevent bacteria, viruses, scale, salt ions and other substances, and only allow water molecules to pass through, thereby ensuring the safety of drinking water; and substances that do not pass through the reverse osmosis membrane form concentrated water and are discharged. Therefore, when using an RO membrane to purify water, a large amount of concentrated water is inevitably produced at the same time as the production of water, which not only wastes a lot, but also affects the user's perception.

[0003] An electrosorption filter element is another popular filter element, which is also wound from a membrane material. The electrosorption filter element includes at least one of a bipolar membrane electrodialysis filter element, an ion exchange resin filter element, an electric capacity desalination filter element, a membrane electric capacity desalination filter element, and an electric regeneration ion exchange filter element. The working principle is that the space between adjacent membrane sheets is used as a flow channel, and different potentials are applied to adjacent membrane sheets. In one case, the anions and cations in the incoming water are adsorbed onto the membrane sheets of the corresponding electrodes, thereby obtaining purified water. In another case, the polarity of the adjacent membrane sheets is reversed, and the ions adsorbed on the membrane sheets return to the incoming water, thereby obtaining salt water with a higher concentration. This process is also called regeneration. For example, CN113402073A, CN212403789U, and CN212403777U all disclose water purifiers using an electrosorption filter element.

[0004] Since a pair of electrodes must be used for the electrosorption filter element, in order to apply a potential between any adjacent membrane sheets, electrodes are generally arranged at the center and periphery of the wound membrane body. In the prior art, the filter bottle shell is first processed, and the peripheral electrode, i.e., the membrane body electrode, is pre-applied to the inner wall of the filter bottle shell. At the same time, a center rod is fixed at the center position of the filter bottle shell, and the center electrode is wound on the center rod. Then the membrane body is placed in the filter bottle shell, wrapped around the center rod, the membrane roll is fixed, and the filter bottle is sealed. Finally, the leads of the center electrode and the membrane body electrode are processed into suitable electrical connectors, and the filter bottle shell also needs to be processed with water inlet and outlet ports.

[0005] The problem with the prior art is that during the electrosorption process, the electrodes have an ionizing effect on water, which inevitably produces tiny bubbles. These bubbles always float upwards and accumulate in the upper part. The currently popular filter bottle arrangement is a horizontal arrangement, i.e., the axis of the filter bottle is horizontally arranged. At this time, the upper part of the filter bottle is its cylindrical shell, and there is no waterway port at this position. The bubbles cannot be discharged and can only accumulate more and more, thereby causing the water flow to be unable to fill the area, wasting a lot of space in the filter bottle. SUMMARY

[0006] The present application aims to overcome the above-mentioned defects, and provide a filter bottle structure based on an electric adsorption filter core.

[0007] The technical solution adopted by the present application is as follows: a filter bottle structure based on an electric adsorption filter core, comprising a cylindrical filter bottle shell, an electric adsorption filter core in the filter bottle shell, a filter bottle front end cover and a filter bottle rear end cover at both ends of the filter bottle shell, and the filter core is fixed and packaged in the inner cavity of the filter bottle shell; the filter bottle rear end cover is provided with a water inlet port, a water outlet port and at least two electric connection heads; characterized in that: the inner cavity of the filter bottle shell is approximately cylindrical, the inner diameter at the filter bottle rear end cover is larger than the inner diameter at the filter bottle front end cover; the axial section of the inner wall of the filter bottle shell is a smooth straight line or curve, so that the inner diameter of the inner cavity of the filter bottle shell gradually changes.

[0008] The filter bottle front end cover and the filter bottle rear end cover are both split type, and are packaged with the filter bottle shell main body to form the filter bottle shell.

[0009] The water inlet port and the water outlet port on the filter bottle rear end cover, wherein the water inlet port is closer to the center of the rear end cover.

[0010] The filter bottle is used horizontally, and its axis is in the horizontal direction.

[0011] The inner cavity axial length of the filter bottle shell is 300-320 mm, the inner diameter at the filter bottle front end cover is 70-80 mm, and the inner diameter at the filter bottle rear end cover is 75-85 mm.

[0012] Further, the electric adsorption filter core comprises a center rod, a center electrode wound on the center rod, and a membrane body wound from a membrane material and sleeved on the outside of the center rod; a membrane body electrode is wound on the periphery of the membrane body; a filter core front end cover and a filter core rear end cover fix the membrane body and the center rod as a whole, and the lead wires of the center electrode and the membrane body electrode are led out from the filter core rear end cover; the membrane material is one of a deionization membrane, an ion exchange resin membrane, a capacitive desalination membrane or an electric regeneration ion exchange membrane.

[0013] The applicant has found in practice that when the inner cavity of the filter bottle shell has different inner diameters, bubbles always flow towards the end with a larger inner diameter, so that by adopting the technical solution of the present application, the bubbles move towards the filter bottle rear end cover and are discharged after entering the waterway through the water outlet port; the water inlet port on the filter bottle rear end cover is closer to the center, which means that the water outlet port is farther away from the center, and when the filter bottle is placed horizontally, the position of the water outlet port is higher, which is more conducive to discharging bubbles. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a cross-sectional view of the filter core in the embodiment.

[0015] Figure 2 is a cross-sectional exploded view of the filter bottle.

[0016] Figure 3 is a schematic view of the filter bottle in cross section.

[0017] Figure 4 is a schematic view of the filter bottle rear end cap.

[0018] The reference signs are as follows: 1 - filter core; 10 - membrane body; 11 - central rod; 12 - filter core front end cap; 13 - filter core rear end cap; 14 - central electrode; 141 - central electrode lead; 15 - membrane body electrode; 151 - membrane body electrode lead; 16 - sealing ring; 17 - sealing glue; 20 - filter bottle shell; 201 - filter bottle shell front end; 202 - filter bottle shell rear end; 22 - filter bottle front end cap; 23 - filter bottle rear end cap; 231 - positive electrode contact; 232 - negative electrode contact; 24 - water inlet port; 25 - water outlet port. DETAILED DESCRIPTION

[0019] Referring to the drawings, the filter core 1 in this embodiment uses an electrically regenerable ion exchange membrane as the membrane material, which includes a membrane body 10 formed by winding the membrane material around a central rod 11, and a central electrode 14 wound around the central rod; a membrane body electrode 15 wound around the periphery of the membrane body; a filter core front end cap 12 and a filter core rear end cap 13 fixing the membrane body 10 and the central rod 11 together and bonded with sealing glue 17. A sealing ring 16 is provided at the filter core rear end cap 13 to facilitate assembly with the filter bottle shell in the next step; the central electrode and the membrane body electrode are provided with leads 141, 151 respectively, which pass out of the rear end cap 13.

[0020] The electrically regenerable filter core 1 is then installed into the filter bottle.

[0021] The filter bottle includes a filter bottle shell 20, which has a standard cylindrical outer shape and an approximately cylindrical inner cavity. Since the shell wall is thicker at the front end and thinner at the rear end, it appears as an oblique line in cross section, resulting in a smaller inner diameter at the front end 201 and a larger inner diameter at the rear end 202 of the inner cavity. In this embodiment, the inner diameter at the front end 201 is 70 mm, and the inner diameter at the rear end 202 is 80 mm, while the length of the filter bottle shell 20 is 300 mm.

[0022] The electrically regenerable filter core 1 is then inserted into the filter bottle shell 20 from the rear end 202 and fixed by the filter bottle rear end cap 23 and the filter bottle front end cap 22. The filter bottle rear end cap 23 is provided with a water inlet port 24 and a water outlet port 25, as well as a positive electrode contact 231 and a negative electrode contact 232; in the cross-sectional view, the two electrode contacts are labeled on the same cross section for ease of expression, and in practice, the arrangement of the rear end cap is as shown in Figure 4 .

[0023] The positive and negative electric contacts 231 and 232 are both plug-in type contacts, which are electrically connected with the center electrode lead 141 and the membrane electrode lead 151 respectively. The water inlet port 24 and the water outlet port 25 are arranged on the same diameter of the circular rear end cover of the filter bottle, with the water inlet port inside and the water outlet port outside, so that when the filter bottle is horizontally placed, the water outlet port 25 is at a higher position.

Claims

1. An electric adsorption filter cartridge based filter bottle structure, comprising a cylindrical filter bottle shell, an electric adsorption filter cartridge in the filter bottle shell, a filter bottle front end cover and a filter bottle rear end cover at both ends of the filter bottle shell, and the filter cartridge is fixedly packaged in the inner cavity of the filter bottle shell; the filter bottle rear end cover is provided with a water inlet port, a water outlet port and at least two electric connectors; characterized in that: The inner cavity of the filter bottle shell is approximately cylindrical, the inner diameter at the rear end cover of the filter bottle is larger than the inner diameter at the front end cover of the filter bottle; the axial section of the inner wall of the filter bottle shell is a smooth straight line or curve, so that the inner diameter of the inner cavity of the filter bottle shell gradually changes. ​ 2. The filter bottle structure based on an electric adsorption filter cartridge according to claim 1, characterized in that: The water inlet port and the water outlet port on the rear end cover of the filter bottle, wherein the water inlet port is closer to the center of the rear end cover.

3. The filter bottle structure based on an electric adsorption filter cartridge according to claim 1, characterized in that: The filter bottle is used horizontally, and the axis is in the horizontal direction.

4. The filter bottle structure based on an electric adsorption filter core according to claim 1, characterized in that: The axial length of the inner cavity of the filter bottle shell is 300-320 mm, the inner diameter at the front end cover of the filter bottle is 70-80 mm, and the inner diameter at the rear end cover of the filter bottle is 75-85 mm.

5. The filter bottle structure based on the electric adsorption filter core according to any one of claims 1-4, characterized in that: The electro-adsorption filter core comprises a center rod, a center electrode wound on the center rod, and a membrane body made of a membrane material and sleeved on the outside of the center rod; a membrane body electrode is wound on the periphery of the membrane body; a filter core front end cover and a filter core rear end cover fix the membrane body and the center rod into one body, and the lead wires of the center electrode and the membrane body electrode are led out from the filter core rear end cover; the membrane material is one of a deionization membrane, an ion exchange resin membrane, a capacitive desalination membrane, or an electrically regenerated ion exchange membrane.

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