A filtering water purifying device

Abstract

The utility model discloses a filter water purifying device relates to portable drinking water device technical field, including filter material box, sealing end cover no.

Description

Technical Field

[0001] This utility model relates to the field of portable drinking water devices, and in particular to a water filtration and purification device. Background Technology

[0002] When engaging in outdoor activities such as wilderness exploration and sports, clean drinking water is often difficult to obtain. While drinking water may be provided at these locations, its quality is unreliable, often posing health risks such as excessive turbidity, hardness, and parasites. Furthermore, in emergency situations (such as natural disasters or war), some events can disrupt water supply systems, leading to supply interruptions or water source contamination. Pipe ruptures, reservoir damage, and sewage leaks can all affect people's ability to obtain safe drinking water. Therefore, the availability of safe drinking water quickly and effectively through appropriate on-site water purification devices is crucial for emergency response. Traditional water purifiers primarily rely on filtration and adsorption technologies. While they can remove turbidity and microorganisms, they are ineffective at treating water hardness and other indicators, making them unsuitable for harsher water conditions and limiting their applicability. Moreover, their power sources are mainly squeezing and suction, resulting in low water production and inconvenience. Therefore, automated water purification devices have emerged as a solution.

[0003] Existing automated water purification devices, such as the "Outdoor Water Purifier Cup" disclosed in the utility model patent application number "202323357297.0" and the "Circulating Filter Water Purifier Cup" disclosed in the invention patent application number "202311388917.9", have achieved good water treatment effects through the design of internal filtration structures and can meet the purification requirements of various water qualities. However, both of the above technical solutions use electric devices such as water pumps to pump water to speed up the filtration process. The power source is singular. For example, in the case of single-person use, the electric device is large in size and consumes a lot of energy, and cannot flexibly cope with different water production needs in various scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a water filtration and purification device to solve the problems existing in the prior art. It can change different power modes to meet different water production needs. In electric mode, water is pumped into the water purification device through an external water pump, and air pressure is used to accelerate the flow of the water to be purified into the filter media. In manual mode, the piston rod is pulled and pulled as the power source, thereby achieving efficient and targeted water purification.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a water filtration and purification device, including a filter assembly, a first sealing end cap, a second sealing end cap, an electric device, and a manual device, wherein:

[0007] The first sealing end cap has a water inlet, and the second sealing end cap has a water outlet. The first sealing end cap and the second sealing end cap are respectively sealed and connected to the water inlet and water outlet of the filter assembly. The water inlet is used to receive purified water externally, and the filter assembly can filter and purify the water to be purified into purified water.

[0008] The electric device includes a water pump and a drain pipe. One end of the water pump is connected to the drain pipe, and the other end is detachably connected to the outlet of the sealing end cover. The water pump is used to pump the water to be purified into the filter assembly and discharge the purified water.

[0009] The manual device includes a piston pipe and a piston rod. The first end of the piston pipe is detachably connected to the outlet of the sealing end cap. The piston rod extends into the second end of the piston pipe and slides against the inner wall of the piston pipe. Pulling the piston rod can draw the water to be purified into the filter assembly and draw the purified water into the piston pipe.

[0010] In use, one of the electric device and the manual device is connected to the outlet of the sealing end cap 2.

[0011] In some embodiments, the filtration assembly includes a filter membrane assembly and a filter media box arranged sequentially along the water flow direction. The water inlet end of the filter membrane assembly is detachably connected to the first sealing end cap, the water outlet end of the filter membrane assembly is detachably connected to the water inlet end of the filter media box, and the water outlet end of the filter media box is detachably connected to the second sealing end cap.

[0012] In some embodiments, the first sealing end cap is inserted into or threaded to the water inlet end of the filter membrane assembly, and a silicone sleeve is fitted around the connection between the first sealing end cap and the water inlet end of the filter membrane assembly; the second sealing end cap is inserted into or threaded to the water outlet end of the filter media box, and the silicone sleeve is fitted around the connection between the second sealing end cap and the water outlet end of the filter media box.

[0013] In some embodiments, the filter media box includes multiple layers of filter media boxes arranged sequentially along the water flow direction, and filter media can be detachably disposed in any layer of the filter media box.

[0014] In some embodiments, the filter media box includes an upper filter media box and a lower filter media box arranged sequentially along the water flow direction. The water inlet end of the upper filter media box is inserted or threadedly connected to the water outlet end of the filter membrane assembly, and a silicone sleeve is fitted around the connection between the upper filter media box and the water outlet end of the filter membrane assembly. The water inlet end of the lower filter media box is inserted or threadedly connected to the water outlet end of the upper filter media box, and the silicone sleeve is fitted around the connection between the lower filter media box and the upper filter media box. The water outlet end of the lower filter media box is inserted or threadedly connected to a second sealing end cap, and the silicone sleeve is fitted around the connection between the second sealing end cap and the water outlet end of the lower filter media box.

[0015] In some embodiments, the silicone sleeve between the upper filter media box and the filter membrane assembly, the silicone sleeve between the lower filter media box and the upper filter media box, and the silicone sleeve between the sealing end cap and the lower filter media box are integral silicone sleeves.

[0016] In some embodiments, the filter media box further includes a filter screen, and the filter screen is provided at the water outlet end of both the upper filter media box and the lower filter media box to support the filter media.

[0017] In some embodiments, the filter media in the upper filter media box is a mixture of activated carbon and resin, and the filter media in the lower filter media box is a PP cotton filter layer.

[0018] In some embodiments, the electric device further includes a water pump connecting pipe, through which the water pump is detachably connected to the outlet of the sealing end cover second.

[0019] In some embodiments, the first end of the piston pipe is provided with a water pipe for sealingly connecting with the outlet of the sealing end cap 2.

[0020] The present invention achieves the following technical advantages over the prior art:

[0021] The water filtration and purification device proposed in this utility model can switch between power modes to meet different water production requirements and application scenarios, making the device more versatile. In electric mode, the water pump of the electric device serves as the power source, utilizing air pressure to accelerate the flow of water to be purified into the filter components; in manual mode, the piston rod of the manual device is pulled to provide power, thereby achieving efficient and targeted water purification.

[0022] The manual device uses a piston rod that slides inside the piston pipe. By pulling the piston rod, the air pressure in the piston pipe is reduced, allowing the water to be purified to be drawn into the filter assembly. This method is suitable for scenarios with fewer personnel and lower water consumption, and can save energy consumption from using a water pump.

[0023] The electric device is connected to the sealed end cap, which can use the water pump to generate a pressure difference to speed up the rate at which the water to be purified is drawn into the filter component, thereby improving the water purification efficiency and reducing the time people wait for drinking water. It is suitable for scenarios with large water demand.

[0024] The filter assembly adopts a modular design, and the filter media box and filter membrane assembly can be disassembled. The filter media in the filter media box and filter membrane assembly can also be disassembled and replaced. This not only makes it easy to clean the filter media and extend its service life, but also allows for the replacement of different filter media according to different water qualities, making the water filtration and purification device more applicable and flexible. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the water filtration and purification device disclosed in this utility model.

[0027] Figure 2 This is a cross-sectional view of the water filtration and purification device disclosed in this utility model;

[0028] Figure 3 This is a schematic diagram of the overall structure of the manual device of the water filtration and purification device disclosed in this utility model.

[0029] The attached figures are labeled as follows:

[0030] 100. Water filtration and purification device;

[0031] 1. Sealing end cap; 11. Water inlet;

[0032] 2. Silicone sleeve;

[0033] 3. Filter assembly; 31. Filter membrane assembly; 32. Filter media box;

[0034] 4. Sealing end cap two; 41. Water outlet;

[0035] 5. Piston rod;

[0036] 6. Piston pipe; 61. Water pipe. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] The purpose of this invention is to provide a water filtration and purification device to solve the problems existing in the prior art. It can change different power modes to meet different water production needs. In electric mode, water is pumped into the water purification device through an external water pump, and air pressure is used to accelerate the flow of the water to be purified into the filter media. In manual mode, the piston rod is pulled and pulled as the power source, thereby achieving efficient and targeted water purification.

[0039] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1-3 As shown, this embodiment provides a water filtration and purification device 100, including a filter assembly 3, a first sealing end cap 1, a second sealing end cap 4, an electric device, and a manual device. The first sealing end cap 1 has a water inlet 11, and the second sealing end cap 4 has a water outlet 41. The first and second sealing end caps 1 and 41 are respectively sealed to the water inlet and outlet of the filter assembly 3. The water inlet 11 is connected to a flexible hose, which extends into the water source to be purified, allowing the water to enter the filter assembly 3 through the water inlet 11. The filter assembly 3 can filter and purify the water into purified water. The electric device includes a water pump and a drain pipe. One end of the water pump is connected to the drain pipe, and the other end is connected to the outlet of the second sealing end cap 41. The water inlet 41 is detachably connected to a water pump that pumps the water to be purified into the filter assembly 3 and discharges the purified water for collection and drinking. The manual device includes a piston pipe 6 and a piston rod 5. The first end of the piston pipe 6 is detachably connected to the outlet 41 of the sealing end cap 2. The piston rod 5 extends into the second end of the piston pipe 6 and slides against the inner wall of the piston pipe 6. After the piston pipe 6 is connected to the outlet 41 of the sealing end cap 2, the water to be purified can be drawn into the filter assembly 3 by pulling the piston rod 5, and the purified water can be drawn into the piston pipe 6. By disassembling the piston pipe 6, the purified water in the piston pipe 6 can be discharged by pushing the piston rod 5 for collection and drinking. In use, depending on the usage scenario and water demand, either the electric device or the manual device can be connected to the outlet 41 of the sealing end cap 2.

[0041] In some implementations, such as Figure 1 and Figure 2As shown, the filter assembly 3 includes a filter membrane assembly 31 and a filter media box 32 arranged sequentially along the water flow direction. The inlet end of the filter membrane assembly 31 is detachably connected to the sealing end cap 1, and the detachable connection methods include, but are not limited to, threaded connection and sealed insertion. The outlet end of the filter membrane assembly 31 is detachably connected to the inlet end of the filter media box 32, and the detachable connection methods include, but are not limited to, threaded connection and sealed insertion. The outlet end of the filter media box 32 is detachably connected to the sealing end cap 4, and the detachable connection methods include, but are not limited to, threaded connection and sealed insertion.

[0042] In some embodiments, the sealing end cap 1 is preferably plugged into or threaded to the water inlet end of the filter membrane assembly 31. In order to ensure the sealing of the connection, a silicone sleeve 2 can be fitted on the outside of the connection (butt joint) between the sealing end cap 1 and the water inlet end of the filter membrane assembly 31. The silicone sleeve 2 uses its own elasticity to tightly wrap around the outside of the sealing end cap 1 and the filter membrane assembly 31 and covers the connection (butt joint) between the sealing end cap 1 and the water inlet end of the filter membrane assembly 31, thereby effectively preventing water leakage at the connection position between the sealing end cap 1 and the filter membrane assembly 31 and improving the sealing reliability of the entire water filtration device 100. Similarly, the sealing end cap 2 4 is preferably plugged into or threaded to the outlet end of the filter media box 32. In order to ensure the connection is sealed, a silicone sleeve 2 is also fitted on the outside of the connection (butt joint) between the sealing end cap 2 4 and the outlet end of the filter media box 32. The silicone sleeve 2 uses its own elasticity to tightly wrap around the outside of the sealing end cap 2 4 and the filter media box 32, and covers the connection (butt joint) between the sealing end cap 2 4 and the outlet end of the filter media box 32. This can effectively prevent water leakage at the connection position between the sealing end cap 2 4 and the filter media box 32, and improve the sealing reliability of the entire water filtration device 100.

[0043] In some embodiments, both sealing end cap 1 and sealing end cap 4 are preferably sealing rubber plugs, which are installed and removed from the filter assembly 3 by plugging and unplugging, making them more convenient and providing good sealing.

[0044] In some embodiments, the inlet 11 is preferably located at the center of the sealing end cap 1 and extends through the sealing end cap 1. To facilitate the reception of purified water from the inlet 11, a long flexible hose is preferably connected to the inlet 11. Correspondingly, the outlet 41 is preferably located at the center of the sealing end cap 4 and extends through the sealing end cap 4. To facilitate the connection of electric and manual devices to the outlet 41, an extension pipe is preferably connected to the outlet 41.

[0045] In some embodiments, the filter membrane assembly 31 includes a tubular housing and a filter membrane disposed within the tubular housing. The filter membrane is a common water filter membrane, such as an external pressure hollow fiber ultrafiltration membrane or a nanofiltration membrane.

[0046] In some embodiments, the filter media box 32 adopts a filter media sleeve structure, which includes multiple layers of filter media boxes arranged sequentially along the water flow direction, and filter media can be detachably installed in any layer of the filter media box.

[0047] In some embodiments, the preferred filter media box 32 includes two layers of filter media boxes arranged sequentially along the water flow direction, namely an upper filter media box and a lower filter media box. The water inlet end of the upper filter media box is inserted or threadedly connected to the water outlet end (i.e., the water outlet end of the tubular shell) of the filter membrane assembly 31, and a silicone sleeve 2 is fitted on the outside of the connection between the upper filter media box and the water outlet end of the filter membrane assembly 31 for sealing. The water inlet end of the lower filter media box is inserted or threadedly connected to the water outlet end of the upper filter media box, and a silicone sleeve 2 is fitted on the outside of the connection between the lower filter media box and the upper filter media box for sealing. The water outlet end of the lower filter media box is inserted or threadedly connected to the sealing end cap 4, and a silicone sleeve 2 is fitted on the outside of the connection between the sealing end cap 4 and the water outlet end of the lower filter media box.

[0048] In some implementations, such as Figure 1 and Figure 2 As shown, the silicone sleeve 2 between the upper filter media box and the filter membrane assembly 31, the silicone sleeve 2 between the lower filter media box and the upper filter media box, and the silicone sleeve 2 between the sealing end cap 2 4 and the lower filter media box are preferably integrated as a single piece. That is, a single silicone sleeve 2 with a relatively long axial length is used and fitted onto the outside of the filter media box 32. The silicone sleeve 2 simultaneously covers the connection between the upper filter media box and the water outlet end of the filter membrane assembly 31, the connection between the lower filter media box and the upper filter media box, and the connection between the sealing end cap 2 4 and the water outlet end of the lower filter media box.

[0049] In some embodiments, the filter media box 32 further includes a filter screen, with filter screens fixedly installed at the water outlet ends of both the upper and lower filter media boxes to support the filter media. The filter screen can be fixed to the upper and lower filter media boxes by bonding its outer periphery to the inner walls of the upper and lower filter media boxes. The filter screen has good water permeability, and its pore size allows water to flow through but does not allow the filter media to pass through. In other embodiments, the filter screen can also be replaced with a membrane material that allows only water to flow through.

[0050] In some embodiments, the filter media in the upper filter media box is preferably a mixture of activated carbon and resin (i.e., a mixed structure of resin filter and activated carbon filter), and the filter media in the lower filter media box is preferably a PP cotton filter.

[0051] In some embodiments, the electric device also includes a water pump connecting pipe, through which the water pump is detachably connected to the outlet 41 of the sealing end cap 4. Specifically, the water pump connecting pipe can be inserted into an extension pipe connected to the outlet 41 and tightened with a pipe clamp to prevent the water pump connecting pipe from separating from the extension pipe during water intake.

[0052] In some embodiments, the second end of the piston pipe 6 is open, and the first end is provided with a base plate. The base plate is provided with a water pipe 61 for sealing and inserting into the outlet 41 of the sealing end cover 4. The water pipe 61 communicates with the interior of the piston pipe 6. In use, the water pipe 61 can be inserted into the extension pipe connected to the outlet 41 and tightened with a pipe clamp to prevent the water pipe 61 from separating from the extension pipe during water intake.

[0053] It should be noted that the electric device, once connected to the outlet 41, operates in an instant-on mode. No pre-filled water is required; once the pump is connected to the outlet 41, it can be turned on to pump water into the filter assembly 3, providing a continuous, high-flow-rate supply of purified water. The manual device, however, operates on a syringe piston principle. Connected to the outlet 41, it draws the water to be purified into the filter assembly 3 by pulling the piston rod 5, and promptly receives the purified water filtered by the filter assembly 3. The piston pipe 6 has a fixed volume, enabling single-use quantitative water purification, suitable for small-volume water use scenarios such as single-person use. The electric device, being instant-on, boasts not only a high pumping rate but also a large flow rate, making it suitable for large-scale water use scenarios involving multiple users.

[0054] Operating Mode 1: Connect the hose to the inlet 11 and insert it into the water source to be purified, ensuring the hose inlet is submerged. Connect the electric pump to the outlet 41 and start the pump. The water to be purified is drawn into the filter assembly 3 under atmospheric pressure. After purification by the filter assembly 3, the water flows out sequentially through the pump outlet and drain pipe, and can be collected in a clean cup for drinking. The electric device uses a negative pressure power principle to ensure a continuous and stable water flow through the water purification device, improving purification efficiency and providing necessary power support for subsequent purification steps. Using a water pump accelerates the rate at which the water source enters the water purification device, enhancing the device's stability and thus improving purification efficiency and reducing waiting time for drinking water.

[0055] Operating Mode 2: During backwashing, the outlet 41 is connected to a flexible hose as the inlet for backwashing, and the electric pump is connected to the inlet 11 as the outlet. Starting the pump provides power to pump clean water into the water purifier, cleaning the filter media and extending its lifespan. To prevent backwashing from interfering with or misaligning the filter media or membrane module, filter screens capable of intercepting the filter media and membrane can be installed at the inlet of the membrane module 31 and the upper filter media box.

[0056] Mode 3: Connect the hose to the inlet 11 and insert the hose into the water source to be purified, ensuring the hose inlet is submerged. After connecting the manual device's water pipe 61 to the outlet 41, pull the piston rod 5 to draw the water into the filter assembly 3 and promptly receive the purified water filtered by the filter assembly 3. The manual device uses a syringe piston principle; the piston pipe 6 has a fixed volume, enabling single-use quantitative water purification, suitable for small-volume water use scenarios such as single-person water use.

[0057] The filter assembly 3 adopts a modular design, allowing for replacement of a specific filter media box or filter media after its water purification capacity decreases. Both the filter media box 32 and the filter membrane assembly 31 are cylindrical. The filter media inside the filter media box 32 includes a resin filter layer, a PP cotton filter layer, and an activated carbon filter layer. The resin filter layer has excellent adsorption properties, capable of adsorbing organic matter, inorganic matter, heavy metal ions, etc., from the water, thus softening the water. After long-term use and saturation, the resin filter layer can be reactivated by soaking in saturated saline solution, restoring its adsorption and purification capabilities, allowing for multiple uses and cost savings. The PP cotton filter layer achieves filtration through physical action; the fine fiber spacing on the filter element surface effectively filters out impurities and particles in the liquid. It is inexpensive, saving costs. Heating at an appropriate temperature can clean the PP cotton and extend its service life. The PP cotton can also be purified by washing. During washing, manually flipping it to face both sides achieves a backwashing effect, flushing out adsorbed particles and other substances, thus cleaning the PP cotton, improving its water purification capacity, and extending its service life. The activated carbon filter layer can adsorb organic matter, toxic components, odors, etc. in the water. An external pressure hollow fiber membrane is installed inside the filter membrane module 31. This external pressure hollow fiber membrane uses the pressure difference across the membrane as its driving force. The raw liquid permeates radially from the outside to the inside of the hollow fibers through this pressure difference, becoming the permeate. Large particles and other impurities are trapped on the outside of the hollow fibers. This solution is based on the fact that the micropores on the surface of the external pressure hollow fiber membrane only allow water and small molecules to pass through, becoming permeate, while substances larger than the micropore size are trapped on the inlet side of the membrane, becoming permeate. This achieves the purpose of purification, separation, and concentration of the raw solution using the external pressure hollow fiber membrane. The water to be purified, after passing through the resin filter layer, PP cotton filter layer, activated carbon filter layer, and external pressure hollow fiber membrane layer, meets drinking water standards, ensuring the health of drinking water users.

[0058] It should be noted that the resin filter layer, PP cotton filter layer, activated carbon filter layer and external pressure hollow fiber membrane layer in this embodiment can all be removed and replaced from the filter assembly. Those skilled in the art can reasonably change the type of filter media according to the water quality of the water to be purified, so that the water quality adaptability of the water filtration and purification device in this embodiment is stronger.

[0059] In this embodiment, the power of the water pump of the electric device should not be too high. If it is too high, it may cause internal damage to the water purification device, resulting in water leakage and potentially low purification efficiency.

[0060] In summary, the proposed water filtration and purification device 100 features a modular design for its filtration components. It utilizes multi-layered, replaceable, and freely combinable filter cartridges / media as the primary water purification materials. Optimized structural design enables backwashing, thereby extending the device's lifespan and improving purification efficiency. Furthermore, the device can switch between power modes to meet different water production requirements and application scenarios, making it more versatile.

[0061] The electric mode uses the water pump of the electric device as the power source and uses air pressure to speed up the flow of the water to be purified into the filter components; the manual mode uses the piston rod of the manual device to provide power, thereby achieving efficient and targeted water purification.

[0062] The manual device proposed in this solution uses a piston rod 5 that is slidably installed inside the piston pipe 6. By pulling the piston rod 5, the air pressure in the piston pipe 6 can be reduced, allowing the water to be purified to be drawn into the filter assembly 3. This method is suitable for scenarios with fewer personnel and lower water consumption, and can save energy consumption from using a water pump.

[0063] The electric device proposed in this solution is connected to the sealing end cap 4 via a water pump connection pipe. It can use the water pump to generate a pressure difference to accelerate the rate at which the water to be purified is drawn into the filter component 3, thereby improving the water purification efficiency and reducing the waiting time for drinking water. It is suitable for scenarios with large water demand.

[0064] The filter assembly 3 proposed in this solution adopts a modular design. The filter media box 32 and the filter membrane assembly 31 can be disassembled, and the filter media in the filter media box 32 and the filter membrane assembly 31 can also be disassembled and replaced. This not only facilitates the cleaning of the filter media and extends its service life, but also allows for the replacement of different filter media according to different water qualities, making the water filtration device more applicable and flexible.

[0065] It should be noted that adaptive changes made according to actual needs are all within the protection scope of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A water filtration and purification device, characterized in that, Includes a filter assembly, sealing end cap one, sealing end cap two, an electric actuator, and a manual actuator, wherein: The first sealing end cap has a water inlet, and the second sealing end cap has a water outlet. The first sealing end cap and the second sealing end cap are respectively sealed and connected to the water inlet and water outlet of the filter assembly. The water inlet is used to receive purified water externally, and the filter assembly can filter and purify the water to be purified into purified water. The electric device includes a water pump and a drain pipe. One end of the water pump is connected to the drain pipe, and the other end is detachably connected to the outlet of the sealing end cover. The water pump is used to pump the water to be purified into the filter assembly and discharge the purified water. The manual device includes a piston pipe and a piston rod. The first end of the piston pipe is detachably connected to the outlet of the sealing end cap. The piston rod extends into the second end of the piston pipe and slides against the inner wall of the piston pipe. Pulling the piston rod can draw the water to be purified into the filter assembly and draw the purified water into the piston pipe. In use, one of the electric device and the manual device is connected to the outlet of the sealing end cap 2.

2. The water filtration and purification device according to claim 1, characterized in that, The filtration assembly includes a filter membrane assembly and a filter media box arranged sequentially along the water flow direction. The water inlet end of the filter membrane assembly is detachably connected to the first sealing end cap, the water outlet end of the filter membrane assembly is detachably connected to the water inlet end of the filter media box, and the water outlet end of the filter media box is detachably connected to the second sealing end cap.

3. The water filtration and purification device according to claim 2, characterized in that, The first sealing end cap is inserted into or threaded to the water inlet end of the filter membrane assembly, and a silicone sleeve is fitted around the connection between the first sealing end cap and the water inlet end of the filter membrane assembly; the second sealing end cap is inserted into or threaded to the water outlet end of the filter media box, and the silicone sleeve is fitted around the connection between the second sealing end cap and the water outlet end of the filter media box.

4. The water filtration and purification device according to claim 2 or 3, characterized in that, The filter media box includes multiple layers of filter media boxes arranged sequentially along the water flow direction, and filter media can be detachably installed in any layer of the filter media box.

5. The water filtration and purification device according to claim 4, characterized in that, The filter media box includes an upper filter media box and a lower filter media box arranged sequentially along the water flow direction. The water inlet end of the upper filter media box is inserted or threadedly connected to the water outlet end of the filter membrane assembly, and a silicone sleeve is fitted around the connection between the upper filter media box and the water outlet end of the filter membrane assembly. The water inlet end of the lower filter media box is inserted or threadedly connected to the water outlet end of the upper filter media box, and the silicone sleeve is fitted around the connection between the lower filter media box and the upper filter media box. The water outlet end of the lower filter media box is inserted or threadedly connected to a second sealing end cap, and the silicone sleeve is fitted around the connection between the second sealing end cap and the water outlet end of the lower filter media box.

6. The water filtration and purification device according to claim 5, characterized in that, The silicone sleeve between the upper filter media box and the filter membrane assembly, the silicone sleeve between the lower filter media box and the upper filter media box, and the silicone sleeve between the sealing end cap and the lower filter media box are all integral silicone sleeves.

7. The water filtration and purification device according to claim 5, characterized in that, The filter media box also includes a filter screen, and the filter screen is provided at the water outlet end of both the upper filter media box and the lower filter media box to support the filter media.

8. The water filtration and purification device according to any one of claims 1 to 3, characterized in that, The electric device also includes a water pump connecting pipe, and the water pump is detachably connected to the outlet of the sealing end cover 2 through the water pump connecting pipe.

9. The water filtration and purification device according to any one of claims 1 to 3, characterized in that, The first end of the piston pipe is provided with a water pipe for sealing and inserting with the outlet of the sealing end cap 2.

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