A dual-membrane direct drinking water equipment using ultrafiltration and nanofiltration

Abstract

This utility model discloses a dual-membrane direct drinking water equipment using ultrafiltration and nanofiltration, belonging to the technical field of direct drinking water equipment. It includes a tank, inside which a filter box is installed. The top of the filter box has four inlets, each containing a filtration mechanism. A filter cartridge is installed at the bottom of the tank below the filter box. A top cover is bolted to the top of the tank. A drain pipe connects to the outside of the tank. The filtration mechanism includes a water collection chamber located below the water inlet at the top of the filter box. A drain hole is located at the bottom of the water collection chamber at the bottom of the filter box. An installation plate is installed inside the water inlet, and locking blocks are fixedly connected to both sides of the installation plate. These locking blocks engage with slots on both sides of the water inlet at the top of the filter box. This utility model performs multi-stage filtration of the water source through a first, second, and third filter screen. The mounting plate is fixed by the locking blocks on both sides, allowing for quick and easy fixation of the first, second, and third filter screens, facilitating disassembly, cleaning, or replacement.

Description

Technical Field

[0001] This utility model belongs to the field of direct drinking water equipment technology, specifically relating to a direct drinking water equipment using an ultrafiltration-nanofiltration dual-membrane method. Background Technology

[0002] Direct drinking water purification equipment involves processes such as impurity removal, sterilization, filtration, and water softening in drinking water sources. This effectively removes impurities, bacteria, heavy metal ions, and other contaminants from the water, making it safe for direct consumption.

[0003] A piped drinking water disinfection device is disclosed in patent document CN222204864U. The device includes a housing, with an inlet pipe at one end and an outlet pipe at the other end. The inlet pipe is movably connected to the housing. A filter mechanism is installed inside the housing. The filter mechanism includes a mounting shaft, with a water guide plate on the outside of the mounting shaft. The water guide plate has a spiral structure, and multiple filter mechanisms are movably connected to the water guide plate. Multiple grooves are opened on the top surface of the water guide plate, and an installation groove is opened on the side wall of the mounting shaft. One end of the filter mechanism is inserted into the installation groove, and the bottom surface of the filter mechanism is located in the groove.

[0004] However, in actual use, although the above-mentioned device can filter water through the filtration mechanism, the filtration mechanism is fixedly installed inside the housing. After long-term use, it is not easy for users to clean or replace the filtration mechanism, which leads to difficulties in handling the filter residue and poor performance. Utility Model Content

[0005] The purpose of this invention is to provide a direct drinking water equipment using an ultrafiltration and nanofiltration dual-membrane method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a direct drinking water equipment using ultrafiltration and nanofiltration dual-membrane methods, comprising a tank, a filter box installed inside the tank, four water inlets on the top of the filter box, each of the four water inlets being equipped with a filtration mechanism, a filter cylinder installed at the bottom of the tank below the filter box, a top cover bolted to the top of the tank, and a discharge pipe connected to the outside of the tank.

[0007] In a preferred embodiment, the filtration mechanism includes a water collection cavity located below the water inlet at the top of the filter box. A drain hole is provided at the bottom of the water collection cavity at the bottom of the filter box. An installation plate is provided inside the water inlet. A locking block is fixedly connected to both sides of the installation plate. The locking block is inserted into the locking grooves on both sides of the water inlet at the top of the filter box. A first filter screen is installed at the bottom of the installation plate. A second filter screen is embedded in the inner cavity of the first filter screen. A third filter screen is embedded in the inner cavity of the second filter screen.

[0008] In a preferred embodiment, the first filter screen is made of stainless steel melt material, the second filter screen is made of PTFE material, and the third filter screen is made of ceramic material.

[0009] In a preferred embodiment, the filter cartridge includes a base fixedly disposed at the bottom of the tank body, and an outer mesh is fixedly connected to the top of the base.

[0010] In a preferred embodiment, an inner network is installed inside the outer network, and a filter element is inserted between the outer network and the inner network.

[0011] In a preferred embodiment, mounting blocks are fixedly connected to both sides of the filter box, and mounting grooves that cooperate with the mounting blocks are opened on both sides of the inner wall of the tank.

[0012] In a preferred embodiment, a control valve is provided on the outside of the discharge pipe.

[0013] In a preferred embodiment, the filter element is provided with an ultrafiltration membrane and a nanofiltration membrane in sequence from the outside to the inside.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model utilizes a water collection chamber, a drain hole, a first filter screen, a second filter screen, and a third filter screen. Water enters the water collection chamber through the inlet and is then filtered sequentially through the first, second, and third filter screens. After filtration, the water is discharged through the drain hole in the center channel of the third filter screen, thus performing multi-stage filtration. The mounting plate is fixed by clips on both sides, allowing for quick and easy fixation of the first, second, and third filter screens, facilitating later disassembly, cleaning, or replacement. This invention features an ultrafiltration membrane and a nanofiltration membrane arranged sequentially from the outside to the inside of a filter element. The ultrafiltration membrane can trap large molecular pollutants such as bacteria, colloids, and suspended solids, while retaining minerals. The nanofiltration membrane selectively traps divalent ions and organic matter, while allowing monovalent ions to pass through. The desalination rate is between that of ultrafiltration and reverse osmosis, and it can remove heavy metals while retaining some beneficial minerals. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tank in this utility model. Figure 3 This is a schematic diagram showing the connection structure of the filter box, water inlet, and filtration mechanism of this utility model. Figure 4 This is a schematic diagram of the filter cartridge structure of this utility model; Figure 5 This is a schematic diagram of the connection structure of the filter element, ultrafiltration membrane, and nanofiltration membrane of this utility model.

[0016] In the diagram: 1. Tank; 2. Filter box; 3. Inlet; 4. Filtration mechanism; 401. Water collection chamber; 402. Drain hole; 403. Mounting plate; 404. Locking block; 405. First filter screen; 406. Second filter screen; 407. Third filter screen; 5. Filter cartridge; 501. Base; 502. Outer mesh; 503. Filter element; 504. Inner mesh; 6. Top cover; 7. Discharge pipe; 8. Mounting block; 9. Mounting groove; 10. Control valve; 11. Ultrafiltration membrane; 12. Nanofiltration membrane. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments.

[0018] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention. Example

[0019] Please see Figures 1-5 This utility model provides a direct drinking water equipment using an ultrafiltration / nanofiltration dual-membrane method, comprising a tank 1, a filter box 2 installed inside the tank 1, four water inlets 3 on the top of the filter box 2, each of the four water inlets 3 having a filtration mechanism 4 inside, a filter cartridge 5 installed at the bottom of the tank 1 below the filter box 2, a top cover 6 bolted to the top of the tank 1, and a discharge pipe 7 connected to the outside of the tank 1. Water enters the tank 1 through the water inlet pipe on the top cover 6, enters the filter box 2 through the water inlet 3 on the top of the filter box 2, and is filtered by the filtration mechanism 4. The filtered water flows into the bottom of the tank 1 and is further purified by the filter cartridge 5. Finally, the purified water is discharged through the discharge pipe 7.

[0020] Specifically, such as Figure 2 and Figure 3As shown, the filtration mechanism 4 includes a water collection chamber 401 located below the water inlet 3 at the top of the filter box 2. A drain hole 402 is provided at the bottom of the water collection chamber 401 at the bottom of the filter box 2. An installation plate 403 is installed inside the water inlet 3. Locking blocks 404 are fixedly connected to both sides of the installation plate 403. The locking blocks 404 are inserted into the locking slots on both sides of the water inlet 3 at the top of the filter box 2. A first filter screen 405 is installed at the bottom of the installation plate 403. A second filter screen 406 is embedded in the inner cavity of the first filter screen 405. A third filter screen 407 is embedded in the inner cavity of the second filter screen 406. The first filter screen 405 is made of stainless steel melt material, the second filter screen 406 is made of PTFE material, and the third filter screen 407 is made of... Made of ceramic; in use, the first filter screen 405, the second filter screen 406, and the third filter screen 407 are interlocked and installed on the top of the mounting plate 403. The mounting plate 403 is then fixed by the clips 404 on both sides, thus quickly fixing the first filter screen 405, the second filter screen 406, and the third filter screen 407, facilitating disassembly, cleaning, or replacement later. Water enters the water collection chamber 401 through the inlet 3, and then passes through the first filter screen 405, the second filter screen 406, and the third filter screen 407 in sequence for filtration. After filtration, the water is discharged through the drain hole 402 in the central channel of the third filter screen 407, thus achieving multi-stage filtration of the water.

[0021] Specifically, such as Figure 2 and Figure 4 As shown, the filter cartridge 5 includes a base 501 fixedly installed at the bottom of the tank 1, and an outer mesh 502 fixedly connected to the top of the base 501; an inner mesh 504 is installed inside the outer mesh 502, and a filter element 503 is inserted between the outer mesh 502 and the inner mesh 504; in use, the base 501 supports and fixes the outer mesh 502 and the inner mesh 504, and the filter element 503 is inserted between the outer mesh 502 and the inner mesh 504 to purify the water.

[0022] Specifically, such as Figure 2 As shown, both sides of the filter box 2 are fixedly connected to the mounting blocks 8, and both sides of the inner wall of the tank body 1 are provided with mounting grooves 9 that cooperate with the mounting blocks 8. In use, the two sides of the filter box 2 are inserted into the mounting grooves 9 through the mounting blocks 8 to quickly limit and fix the filter box 2, which facilitates installation and disassembly and facilitates later maintenance.

[0023] Specifically, such as Figure 1 As shown, a control valve 10 is provided on the outside of the discharge pipe 7; in use, the flow rate of the discharge pipe 7 can be easily controlled by the control valve 10.

[0024] Specifically, such as Figure 5As shown, the filter element 503 is provided with an ultrafiltration membrane 11 and a nanofiltration membrane 12 from the outside to the inside. In use, the ultrafiltration membrane 11 can intercept large molecular pollutants such as bacteria, colloids, and suspended solids, while retaining minerals. The nanofiltration membrane 12 selectively intercepts divalent ions and organic matter, while allowing monovalent ions to pass through. The desalination rate is between that of ultrafiltration and reverse osmosis. It can remove heavy metals but retain some beneficial minerals.

[0025] The working principle and usage process of this utility model are as follows: In actual operation, water enters the tank 1 through the water inlet pipe on the top cover 6. Water enters the filter box 2 through the water inlet 3 at the top of the filter box 2. The first filter screen 405, the second filter screen 406, and the third filter screen 407 are embedded and installed on the top of the mounting plate 403. The mounting plate 403 is fixed by the clips 404 on both sides of the mounting plate 403, thereby quickly fixing the first filter screen 405, the second filter screen 406, and the third filter screen 407, which is convenient for disassembly, cleaning, or replacement later. Water enters the water collection chamber 401 through the water inlet 3, and then passes through the first filter screen 405, the second filter screen 406, and the third filter screen 407 in sequence to filter the water. After filtration, the water is discharged through the drain hole 402 in the center channel of the third filter screen 407.

[0026] Furthermore, in the above process, the water source inside the water collection chamber 401 first contacts the outer surface of the stainless steel melt filter element. Through its multi-layer sintered structure with a precision of 1-50μm, it intercepts large particles of impurities such as mud, sand, and rust. The pre-filtered water penetrates the inner wall of the stainless steel filter element and enters the PTFE pleated filter element. Through the hydrophobic membrane layer with a precision of 0.1μm, oily substances and particles are removed. Finally, the water flows into the inner cavity of the ceramic filter element. After its microporous structure with a precision of 0.1-1μm traps bacteria and colloids, the purified water flows into the tank 1 from the drain hole 402 in the central channel of the ceramic filter element. Each filter screen adopts an outside-in, inside-out flow direction, progressively improving the filtration precision and enhancing the water source filtration effect. This allows for multi-stage filtration of the water source. The filtered water flows into the bottom of the tank 1 and undergoes further purification treatment through the filter cartridge 5. Finally, the purified water is discharged through the discharge pipe 7.

[0027] 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 direct drinking water equipment using ultrafiltration and nanofiltration dual-membrane methods, comprising a tank (1), characterized in that: The tank (1) is equipped with a filter box (2) inside. The filter box (2) has four water inlets (3) on the top. Each of the four water inlets (3) is equipped with a filtration mechanism (4). The bottom of the tank (1) is equipped with a filter cylinder (5) below the filter box (2). The top of the tank (1) is bolted with a top cover (6). The outside of the tank (1) is connected to a discharge pipe (7).

2. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 1, characterized in that: The filtration mechanism (4) includes a water collection chamber (401) located below the water inlet (3) at the top of the filter box (2). The bottom of the filter box (2) is provided with a drain hole (402) at the bottom of the water collection chamber (401). An installation plate (403) is provided inside the water inlet (3). A locking block (404) is fixedly connected to both sides of the installation plate (403). The locking block (404) is inserted into the locking groove on both sides of the water inlet (3) at the top of the filter box (2). A first filter screen (405) is installed at the bottom of the installation plate (403). A second filter screen (406) is embedded in the inner cavity of the first filter screen (405). A third filter screen (407) is embedded in the inner cavity of the second filter screen (406).

3. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 2, characterized in that: The first filter screen (405) is made of stainless steel melt material, the second filter screen (406) is made of PTFE material, and the third filter screen (407) is made of ceramic material.

4. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 1, characterized in that: The filter cartridge (5) includes a base (501) fixedly installed at the bottom of the tank (1), and an outer mesh (502) is fixedly connected to the top of the base (501).

5. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 4, characterized in that: An inner net (504) is installed inside the outer net (502), and a filter element (503) is inserted between the outer net (502) and the inner net (504).

6. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 1, characterized in that: The filter box (2) is fixedly connected to both sides with mounting blocks (8), and the inner wall of the tank (1) is provided with mounting grooves (9) that cooperate with the mounting blocks (8) on both sides.

7. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 1, characterized in that: A control valve (10) is provided on the outside of the discharge pipe (7).

8. The ultrafiltration-nanofiltration dual-membrane direct drinking water equipment according to claim 5, characterized in that: The filter element (503) is provided with an ultrafiltration membrane (11) and a nanofiltration membrane (12) from the outside to the inside.

Images