A washing water purification device

Abstract

The application relates to the technical field of household appliances, and discloses a washing water purification device which comprises a connecting plug, a filtering plug, a first filter and a second filter; a water inlet end of the filtering plug is detachably connected to a water outlet end of the connecting plug, and a water outlet end of the filtering plug is used for connecting a water inlet pipe of a washing machine; the first filter is arranged in a second flow guide channel, a first filter inlet is communicated with an outlet of the first flow guide channel, and the first filter outlet can allow water flow to pass through and can prevent solid impurities in the water flow from passing through; the second filter is arranged in the second flow guide channel, a second filter outlet is communicated with the water outlet end of the filtering plug, and a filter material is arranged in a second filter cavity and used for filtering residual chlorine in the water flow; the first filter extends into the second filter cavity, the first filter outlet is communicated with the second filter cavity, and the solid impurities are blocked by the first filter and cannot enter the second filter cavity and the second flow guide channel, so that the two filters can be conveniently detached.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a washing water purification device. Background Technology

[0002] The field of home appliance technology encompasses a wide range of product categories, including but not limited to refrigerators, washing machines, air conditioners, microwave ovens, dishwashers, and vacuum cleaners. The technological development trends for these products primarily focus on intelligentization, energy conservation and environmental protection, optimized user experience, and the application of new materials. Optimized user experience is achieved through design innovation and functional enhancement to meet consumers' demands for health, convenience, and personalization.

[0003] As an important household appliance, washing machines greatly reduce people's housework burden. Most existing washing machines use tap water directly into the washing drum to wash clothes. Water treatment plants often use chlorination for disinfection, resulting in a certain amount of residual chlorine in the water. The strong oxidizing properties of residual chlorine may damage the molecular structure of dyes in clothing, causing it to fade. Clothing made of protein fibers such as wool is prone to deformation, pilling, or even damage due to the chemical bonds in the fibers being broken by residual chlorine. Long-term washing with tap water containing residual chlorine can also cause clothes to yellow, seriously affecting their appearance and wearing experience. Utility Model Content

[0004] This application discloses a washing water purification device that can filter impurities such as rust and sediment, as well as residual chlorine in tap water entering the washing machine. The first filter element is set inside the second filter element, which saves space. Solid impurities are blocked by the first filter element and will not enter the second filter chamber and the second flow channel. It is convenient to disassemble the two filter elements and make it easy for users to clean impurities.

[0005] To achieve the above objectives, this application discloses a washing water purification device, including a connector plug, a filter plug, a first filter element, and a second filter element. The inlet end of the connector plug is used to connect to a water source, and the connector plug has a first flow channel for guiding water flow. The inlet end of the filter plug is detachably connected to the outlet end of the connector plug, and the outlet end of the filter plug is used to connect to the washing machine's water inlet pipe. The filter plug has a second flow channel that communicates with the first flow channel. The first filter element is disposed within the second flow channel and has a first filter chamber and a first filter inlet and a first filter outlet that communicate with the first filter chamber. The first filter inlet is connected to... The first filter outlet, located at the outlet of the first flow channel, allows water to flow through while preventing solid impurities in the water from passing through. A second filter element is disposed within the second flow channel, having a second filter chamber and a second filter outlet connected to the second filter chamber. The second filter outlet is connected to the water outlet of the filter plug. The second filter chamber contains filter media used to filter residual chlorine in the water. The first filter element extends into the second filter chamber, and the first filter outlet is connected to the second filter chamber, allowing water to sequentially pass through the first flow channel, the first filter inlet, the first filter chamber, the first filter outlet, the second filter chamber, the second filter outlet, and the water outlet of the filter plug before entering the washing machine's water inlet pipe.

[0006] Thus, the washing water purification device has a first filter and a second filter inside the filter plug. The first filter prevents solid impurities (such as rust and sediment) from passing through the water, avoiding their contamination of clothes after entering the washing machine. The second filter specifically removes residual chlorine from the water, reducing oxidative damage to clothes and effectively solving problems such as fading, fiber breakage, and yellowing after long-term washing. This ensures clean water flowing into the washing machine and protects the quality of clothes. The first filter extends into the second filter chamber, creating a nested arrangement that reduces the internal space occupied by the device, making the overall structure more compact. Furthermore, the water must first pass through the first filter (where solid impurities are blocked) before entering the second filter chamber to contact the filter media and remove residual chlorine. This water flow path ensures that solid impurities do not enter the exterior of the second filter, preventing impurities from accumulating on its outer surface and reducing contamination of the second filter and the inner wall of the filter plug. When cleaning or maintenance is required, the user can disassemble the filter plug. Since solid impurities are only blocked within the first filter element, and there is no contamination between the second filter element and the filter plug, the second and first filter elements can be directly removed. This allows users to quickly clean solid impurities from the first filter element, wash the filter element, or replace the filter media without damaging the second, first, or filter plug. This design facilitates disassembly and maintenance, effectively preventing a decrease in filtration efficiency due to impurities clogging or damage to the filter elements, ensuring that the device can achieve effective filtration.

[0007] As an optional implementation, both the first filter element and the second filter element are cylindrical structures with one open end. The opening of the first filter element is the first filter inlet, and the cylindrical wall of the first filter element is provided with a plurality of first filter outlets. The first filter element extends into the second filter cavity from the opening of the second filter element, and the cylindrical wall of the second filter element is provided with the second filter outlet.

[0008] In this way, water enters the first filter chamber through the opening (first filter inlet) of the first filter element and flows out through the filter outlet on the cylindrical wall. Solid impurities, unable to pass through the filter outlet, naturally settle inside the cylindrical first filter chamber. The first filter chamber effectively collects solid impurities such as rust and silt, preventing them from dispersing or adhering to other parts of the device, facilitating subsequent cleaning. Furthermore, the first filter element extends into the second filter element from its opening; this nested cylindrical layout ensures that impurities are collected centrally. Because the water flow path is limited to "first filter inlet – first filter chamber – first filter outlet – second filter chamber," solid impurities are completely blocked within the first filter chamber and will not enter the second filter element or other areas of the device. When cleaning is required, the user only needs to disassemble the filter plug and remove the filter element to directly clean the impurities collected inside the cylindrical structure, eliminating the need for a complete cleaning of the entire device. This significantly simplifies the cleaning process and improves the convenience of user maintenance.

[0009] As an optional implementation, the first filter element includes a first sidewall, one end of which forms the first filter inlet along the axial direction, and the first filter outlet is provided on the first sidewall; a first cylinder bottom is connected to the end of the first sidewall away from the first filter inlet, and the first cylinder bottom is provided with the first filter outlet; the second filter element includes: a second sidewall located radially outside the first sidewall and having a radial gap with the first sidewall; and a second cylinder bottom axially opposite to the first cylinder bottom.

[0010] Thus, the first sidewall and the bottom of the first filter element are respectively provided with filter outlets. The filter structure of the first filter element has a larger contact area with the water flow, resulting in better filtration. Furthermore, there is a radial gap between the first and second sidewalls, allowing water flowing into the first filter chamber from the first guide channel to quickly flow radially into the second filter chamber. After entering the first filter chamber, the water can flow out quickly from multiple directions (axial and radial), avoiding water flow congestion caused by a single-direction outlet and improving the filtration speed.

[0011] As an optional implementation, filter material is provided between the first cylinder bottom and the second cylinder bottom, as well as between the first sidewall and the second sidewall.

[0012] Thus, on the one hand, after water flows through the first filter outlet into the second filter chamber, it needs to flow towards the second filter outlet of the second filter element. The radial gap between the first and second sidewalls and the axial gap between the first and second cylinder bottoms are both filled with filter media. This ensures that after the water flows out of the first filter outlet, regardless of whether it diffuses from the sidewalls or the bottom of the cylinder, it must pass through the corresponding filter media layer to reach the second filter outlet. This increases the contact area between the water flow and the filter media, preventing the water from flowing out directly without sufficient contact with the filter media in the second filter chamber. It ensures that every part of the water flow can fully react with the filter media, making the filtration of residual chlorine more thorough. On the other hand, the radial gap between the first and second sidewalls and the axial gap between the first and second cylinder bottoms together constitute the main accommodating space of the second filter chamber. Filling the filter media in these areas can increase the effective filling amount of filter media within a limited volume, avoiding space waste. At the same time, the reasonable division of areas makes the distribution of filter media more uniform, reducing the problem of uneven filtration efficiency caused by local filter media accumulation or gaps.

[0013] As an alternative implementation, a first gap is formed between the second sidewall and the inner wall of the filter plug along the radial direction of the second filter element.

[0014] Thus, the first gap provides radial clearance for the installation of the second filter element within the filter plug, reducing the alignment accuracy requirements between the second filter element and the inner wall of the filter plug during assembly and minimizing the risk of friction or jamming during assembly. Furthermore, the gap space facilitates the removal of the second filter element during subsequent maintenance (such as replacing filter media and cleaning the filter element), improving the ease of maintenance of the device.

[0015] As an optional implementation, the second sidewall is provided with the second filter outlet, the bottom of the second cylinder and the bottom wall of the filter plug have a second gap, the first gap and the second gap are connected, and the water outlet of the filter plug is located on the bottom wall of the filter plug.

[0016] In this way, after the water flows out from the outlet of the side wall of the second filter element, it first enters the first gap between the second side wall and the inner wall of the filter plug, then flows into the second gap between the bottom of the second drum and the bottom wall of the filter plug, and finally flows out from the water outlet of the bottom wall. This smoothly guides the water flow out of the washing water purification device, avoids water flow blockage, reduces water pressure loss, ensures a stable water flow into the washing machine, and guarantees washing efficiency.

[0017] As an optional implementation, the second cylinder bottom is provided with the second filter outlet, and the second filter outlet at the bottom of the second cylinder communicates with the second gap.

[0018] In this way, water can flow not only radially (from the outlet on the second side wall) but also axially (from the outlet at the bottom of the second drum), avoiding the limitation of a single outflow path and preventing increased flow resistance caused by local blockage at the side wall outlet or concentrated water flow. Even if the flow efficiency of the filter outlet on the second side wall decreases due to filter media wear or impurity adhesion, the water can still flow smoothly into the second gap through the outlet at the bottom of the second drum, ensuring stable overall water flow, reducing water pressure loss, and guaranteeing the washing machine's water intake efficiency. Moreover, a single side wall outlet may cause water to concentrate and impact the filter media near the second side wall for a long time, resulting in localized compaction and excessive wear of the filter media, affecting the filtration effect and service life. By also having a second filter outlet at the bottom of the second drum, the water pressure is distributed in both directions, reducing the stress on the localized filter media and lowering the risk of structural damage caused by long-term impact. At the same time, the water flows directly into the second gap through the outlet at the bottom of the drum, shortening the flow path of some water within the second guide channel.

[0019] As an optional implementation, the bottom wall of the filter plug is provided with a support structure, the support structure is arranged around the water outlet end of the filter plug, and the support structure abuts against the bottom of the second cylinder. The support structure is provided with a water inlet, which penetrates the support structure radially.

[0020] Thus, the support structure, by abutting against the bottom of the second drum, stably confines the second filter element between the filter plug and the connecting plug, preventing axial displacement or shaking under the action of water flow. When the user needs to clean or replace the filter element, simply disassemble the filter plug; the support structure's abutment and confinement of the second filter element will then be released, allowing the second filter element to be removed directly along with the internal first filter element. Since the support structure only achieves confinement through abutment, without any additional fastening structure, the disassembly process requires no tools, making the operation simple and efficient. The radially penetrating water inlet on the support structure, while fulfilling its support function, connects the first gap and the second gap, ensuring that water can flow smoothly from the first gap radially through the water inlet into the second gap, and then converge at the outlet. This design, while enhancing structural support, avoids water flow congestion or water pressure loss caused by the support structure obstructing the flow, ensuring a stable water flow into the washing machine and not affecting washing efficiency.

[0021] As an optional implementation, the outlet end of the connector is provided with: a first baffle, which is annular and surrounds the first filter element; a second baffle, which is annular and spaced apart radially outside the first baffle; the inlet end of the filter connector is inserted between the second baffle and the first baffle and is threadedly connected to the outer surface of the first baffle; and a sealing element, which is disposed between the first filter element and the first baffle to seal the gap between the first filter element and the first baffle.

[0022] Thus, the first and second baffles form a ring-shaped nested space, with the inlet end of the filter plug inserted between them. In the radial direction, the first baffle limits the filter plug from the inside, while the second baffle blocks it from the outside, effectively positioning the filter plug. In the axial direction, the threaded connection provides a stable tightening force, ensuring a tight fit between the filter plug and the connector, preventing axial loosening or gaps under water pressure, and ensuring the stability of the overall structure of the device during long-term use. Moreover, the labyrinthine sealing path formed between the first baffle, the filter plug, and the second baffle increases the flow path of water from the second guide channel to the outside of the device, reducing the possibility of water overflow. The seal forms a physical barrier by filling the gaps, ensuring that all water flows into the first filter chamber after passing through the first filter inlet, ensuring that solid impurities in the water are retained in the first filter chamber after filtration. The water then passes through the second filter chamber for filtration and residual chlorine removal before entering the washing machine's inlet pipe, ensuring the integrity of the filtration process.

[0023] As an optional implementation, the outer surface of the filter plug is provided with a third baffle, which is arranged around the circumference of the filter plug and is arranged axially opposite to the second baffle and has a gap.

[0024] Thus, if water is to leak out of the device, it must pass through the threaded connection gap between the first baffle and the filter plug, then through the gap between the second baffle and the filter plug, and then through the axial gap between the second baffle and the third baffle. The setting of the third baffle further increases the flow path of water in the second guide channel to the outside of the device, reducing the possibility of water overflowing from the device.

[0025] Compared with the prior art, the beneficial effects of this application are:

[0026] The washing water purification device provided in this application embodiment includes a first filter element and a second filter element inside the filter plug. These filters remove solid impurities such as rust and silt, as well as residual chlorine, ensuring that tap water flowing into the washing machine does not contaminate clothes. The first filter element is located inside the second filter element. When water flows into the first filter element through the first guide channel, solid impurities in the water are first blocked by the first filter element. Water without solid impurities passes through the second filter chamber, where residual chlorine is removed by the filter media, and then enters the outlet of the filter plug through the second filter outlet. This saves space while ensuring that solid impurities do not pass through the outside of the second filter element. The filter plug is detachably connected to the connector plug. After removing the filter plug, since there are no solid impurities between the second filter element and the filter plug, both the second and first filter elements can be directly removed. This convenient disassembly allows users to easily clean solid impurities and perform timely cleaning of both filter elements, ensuring their filtration effect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a washing water purification device in the prior art.

[0029] Figure 2 This is a schematic diagram of the structure of the washing water purification device disclosed in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the washing water purification device disclosed in the embodiments of this application assembled with a water source (faucet);

[0031] Figure 4 for Figure 3 Sectional view at point AA;

[0032] Figure 5 This is an exploded view of the washing water purification device disclosed in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the connector structure disclosed in an embodiment of this application;

[0034] Figure 7 This is an exploded view of the connector plug disclosed in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of the filter plug disclosed in an embodiment of this application from a first-view perspective.

[0036] Figure 9 This is a schematic diagram of the filter plug disclosed in an embodiment of this application from a second perspective.

[0037] Figure 10 for Figure 9 Sectional view at point BB;

[0038] Figure 11 This is a schematic diagram of the structure of the first filter element disclosed in the embodiments of this application;

[0039] Figure 12 for Figure 11 Sectional view at point CC.

[0040] Explanation of reference numerals in the attached figures:

[0041] a-Filter gap; b-Filter screen; c-Frame; d-Filter element; f-Bottom cover; 100-Washing water purification device; 1-Connecting plug; 1a-First flow guide channel; 11-Plug body; 11a-Snap-fit ​​hole; 111-First baffle; 112-Second baffle; 113-Sealing element; 114-Protrusion; 12-Operating element; 13-Snap-fit ​​ball; 14-Reset spring; 15-Clamp; 2-Filter plug; 2a-Second flow guide channel; 2 1-Bottom wall; 23-Support structure; 23a-Water outlet; 24-Third baffle; 3-First filter element; 3a-First filter chamber; 3b-First filter inlet; 3c-First filter outlet; 31-First side wall; 32-First cylinder bottom; 33-Flanged edge; 4-Second filter element; 4a-Second filter chamber; 4b-Second filter outlet; 41-Second side wall; 411-First gap; 42-Second cylinder bottom; 421-Second gap; 5-Faucet. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0044] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0045] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0046] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0047] The field of home appliance technology encompasses a wide range of product categories, including but not limited to refrigerators, washing machines, air conditioners, microwave ovens, dishwashers, and vacuum cleaners. The technological development trends for these products primarily focus on intelligentization, energy conservation and environmental protection, optimized user experience, and the application of new materials. Optimized user experience is achieved through design innovation and functional enhancement to meet consumers' demands for health, convenience, and personalization.

[0048] As an important household appliance, washing machines greatly reduce people's housework burden. Most existing washing machines use tap water directly into the washing drum to wash clothes. Water treatment plants often use chlorination for disinfection, resulting in a certain amount of residual chlorine in the water. The strong oxidizing properties of residual chlorine are significantly harmful to clothes. For example, clothes dyed with common reactive dyes may gradually fade due to the residual chlorine damaging the dye molecular structure; clothes made of protein fibers such as wool are prone to deformation, pilling, or even damage due to the chemical bonds in the fibers being broken by residual chlorine; long-term washing with tap water containing residual chlorine can also cause clothes to yellow, seriously affecting their appearance and wearing experience.

[0049] To solve the above problems, combined with Figure 1 , Figure 1 This is a schematic diagram of a prior art washing water purification device. The inventor designed a filtration device with a frame c and a filter screen b inside the filter element d. The filter screen b is fitted around the frame and is used to filter solid impurities such as rust and silt from the water flow. The frame c contains filter media to filter residual chlorine from the water flow. The bottom cover f is threaded to the filter element d for easy disassembly. Solid impurities in the water flow are filtered into the filtration gap a between the filter element d and the filter screen b. However, since the filter is not frequently replaced, solid impurities can accumulate in the filtration gap a over time or with varying water quality, causing the filter element to become clogged. When the user removes the bottom cover f, excessive accumulation of solid impurities in the filtration gap a may cause blockage between the filter screen b and the filter element d, resulting in excessive friction and making it difficult to remove the filter screen and frame. Forcibly pulling out the filter screen and frame may damage the surface structure of the filter screen, preventing it from achieving a good filtration effect even after cleaning, thus affecting the overall filtration efficiency of the device.

[0050] Based on this, this application discloses a washing water purification device that can filter impurities such as rust and sediment, as well as residual chlorine in tap water entering the washing machine. The first filter element is disposed inside the second filter element, which saves space. Solid impurities are blocked by the first filter element and will not enter the second filter chamber and the second flow channel. It is convenient to disassemble the two filter elements and make it easy for users to clean impurities.

[0051] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0052] Please see Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of a washing water purification device 100 in the prior art. Figure 2 This is a schematic diagram of the structure of the washing water purification device 100 disclosed in the embodiments of this application. Figure 3 This is a schematic diagram of the washing water purification device 100 disclosed in this application assembled with a water source (faucet 5). Figure 4 for Figure 3 A cross-sectional view at point AA. This application discloses a washing water purification device 100, which includes a connector 1, a filter plug 2, a first filter element 3, and a second filter element 4. The inlet end of the connector 1 is used to connect to a water source, and the connector 1 has a first flow channel 1a for guiding water flow. The inlet end of the filter plug 2 is detachably connected to the outlet end of the connector 1, and the outlet end of the filter plug 2 is used to connect to the washing machine's water inlet pipe. The filter plug 2 has a second flow channel 2a, which communicates with the first flow channel 1a. The first filter element 3 is disposed within the second flow channel 2a. The filter element 3 has a first filter chamber 3a and a first filter inlet 3b and a first filter outlet 3c connected to the first filter chamber 3a. The first filter inlet 3b is connected to the outlet of the first flow channel 1a. The first filter outlet 3c allows water to flow through and prevents impurities (such as rust, silt, and other solid impurities) in the water from passing through. The second filter element 4 is disposed in the second flow channel 2a. The second filter element 4 has a second filter chamber 4a and a second filter outlet 4b connected to the second filter chamber 4a. The second filter outlet 4b is connected to the water outlet of the filter plug 2. The second filter chamber 4a is provided with filter media, which is used to filter residual chlorine in the water.

[0053] The first filter element 3 extends into the second filter chamber 4a, and the first filter outlet 3c is connected to the second filter chamber 4a, so that the water flow can sequentially pass through the first guide channel 1a, the first filter inlet 3b, the first filter chamber 3a, the first filter outlet 3c, the second filter chamber 4a, the second filter outlet 4b, and the water outlet of the filter plug 2 before entering the washing machine water inlet pipe.

[0054] It should be noted that in most cases, the water inlet pipe of the washing machine in the user's home is connected to faucet 5 as the water source for the washing machine. Therefore, the water source in this application is faucet 5 as an example for the purpose of explanation.

[0055] The washing water purification device 100 has a first filter element 3 and a second filter element 4 installed in the filter plug 2. The first filter element 3 prevents solid impurities (such as rust, silt, etc.) in the water flow from passing through, thus preventing such impurities from entering the washing machine with the water flow and adhering to the surface of the clothes and causing pollution. The second filter element 4 removes residual chlorine in the water flow through filter media, reducing the oxidative damage of residual chlorine to the clothes, effectively solving problems such as fading, fiber breakage, and yellowing after long-term washing, ensuring that the water flowing into the washing machine is clean and protecting the quality of the clothes.

[0056] The first filter element 3 extends into the second filter chamber 4a, creating a nested arrangement that reduces the internal space occupied by the device and makes the overall structure more compact. Simultaneously, the water flow must first pass through the first filter element 3 (solid impurities are blocked within it) before entering the second filter chamber 4a to contact the filter media and remove residual chlorine. This water flow path ensures that solid impurities do not enter the exterior of the second filter element 4, preventing impurities from accumulating on its outer surface and reducing contamination of the second filter element 4 and the inner wall of the filter plug 2. When cleaning or maintenance is required, the user can disassemble the filter plug 2. Since solid impurities are only blocked within the first filter element 3, there is no contamination between the second filter element 4 and the filter plug 2. Therefore, the second filter element 4 and the first filter element 3 can be directly removed, allowing the user to quickly clean solid impurities from the first filter element 3, clean the filter element, or replace the filter media without damaging the second filter element 4, the first filter element 3, or the filter plug 2. This design facilitates disassembly and maintenance, effectively preventing a decrease in filtration efficiency due to impurities clogging or damage to the filter elements, ensuring effective filtration.

[0057] Optionally, the filter media can be activated carbon. Activated carbon has a rich pore structure and a large specific surface area, which can remove residual chlorine (mainly Cl2, HClO, and ClO) from the water through physical adsorption. - Residual chlorine (in the form of Cl2, HClO, and ClO) is adsorbed onto the surface; simultaneously, the carbon in the activated carbon reacts chemically with the residual chlorine. Activated carbon has a rich porous structure and a huge specific surface area, enabling it to adsorb residual chlorine (mainly in the form of Cl2, HClO, and ClO) from water through physical adsorption. - The chlorine is adsorbed onto the surface in various forms (such as C + 2Cl₂ + 2H₂O = CO₂↑ + 4HCl). At the same time, the carbon in the activated carbon reacts chemically with the residual chlorine (e.g., C + 2Cl₂ + 2H₂O = CO₂↑ + 4HCl), converting the free chlorine into harmless chloride ions, thereby achieving deep removal of residual chlorine.

[0058] It should be noted that, in order to prevent the activated carbon in the second filter element 4 from leaking out of the second filter outlet 4b, the pore size of the second filter outlet 4b is designed to be smaller than the particle size of the activated carbon particles, thereby directly preventing the activated carbon particles from passing through the outlet by using physical barriers.

[0059] In some embodiments, combined with Figures 2 to 5 , Figure 5 This is an exploded view of the washing water purification device 100 disclosed in the embodiments of this application. The first filter element 3 and the second filter element 4 are both cylindrical structures with one end open. The opening of the first filter element 3 is the first filter inlet 3b. The cylindrical wall of the first filter element 3 is provided with a plurality of first filter outlets 3c. The first filter element 3 extends into the second filter chamber 4a from the opening of the second filter element 4. The cylindrical wall of the second filter element 4 is provided with a second filter outlet 4b.

[0060] Water enters the first filter chamber 3a through the opening (first filter inlet 3b) of the first filter element 3 and flows out through the filter outlet on the cylindrical wall. Solid impurities, unable to pass through the filter outlet, naturally settle inside the cylindrical first filter chamber 3a. The first filter chamber 3a can collect solid impurities such as rust and silt, preventing them from dispersing or adhering to other parts of the device, thus facilitating subsequent cleaning.

[0061] Furthermore, the first filter element 3 extends into the second filter element 4 through its opening, and this nested cylindrical layout ensures that impurities are collected in a concentrated manner. Since the water flow path is defined as "first filter inlet 3b – first filter chamber 3a – first filter outlet 3c – second filter chamber 4a," solid impurities are completely blocked within the first filter chamber 3a and will not enter the second filter element 4 or other areas of the device. When cleaning is required, the user only needs to disassemble the filter plug 2 and remove the filter element to directly clean the impurities collected inside the cylindrical structure, eliminating the need for a complete cleaning of the entire device. This significantly simplifies the cleaning process and improves the convenience of user maintenance.

[0062] In some embodiments, combined with Figure 4 and Figure 5 as well as Figure 11 and Figure 12 , Figure 11 This is a schematic diagram of the structure of the first filter element 3 disclosed in the embodiments of this application. Figure 12 for Figure 11 In the cross-sectional view at CC, the first filter element 3 includes a first sidewall 31 and a first cylinder bottom 32. One end of the first sidewall 31 along the axial direction forms a first filter inlet 3b, and a first filter outlet 3c is provided on the first sidewall 31. The first cylinder bottom 32 is connected to the end of the first sidewall 31 away from the first filter inlet 3b, and a first filter outlet 3c is provided on the first cylinder bottom 32.

[0063] In some embodiments, the second filter element 4 includes a second sidewall 41 and a second bottom 42, located radially outside the first sidewall 31 and having a radial gap with the first sidewall 31, and the second bottom 42 is axially opposite to the first bottom 32.

[0064] The first sidewall 31 and the first bottom 32 of the first filter element 3 are respectively provided with filter outlets. The filter structure of the first filter element 3 has a larger contact area with the water flow, resulting in better filtration effect. Furthermore, there is a radial gap between the first sidewall 31 and the second sidewall 41, allowing water flowing from the first guide channel 1a into the first filter chamber 3a to quickly flow radially into the second filter chamber 4a. After entering the first filter chamber 3a, the water can flow out quickly from multiple directions (axial and radial), avoiding water flow congestion caused by a single-direction outlet and improving the filtration speed.

[0065] In addition, the bottom of the second drum 42 may be provided with a second filter outlet 4b. In this way, at least a portion of the first filter outlet 3c and at least a portion of the second filter outlet 4b are arranged opposite each other along the axial direction, thereby ensuring that after the tap water is filtered by the first filter element 3, it can flow through the second filter element 4 along the flow direction of the first guide channel 1a (i.e., the inflow direction of the water flow) and flow out of the purification device along the flow direction. This ensures that at least a portion of the water always flows in the same direction, reduces water pressure loss, and thus reduces the influence of the filtration process on the water flow velocity of the tap water flowing into the water inlet pipe, ensuring the water intake efficiency of the washing machine.

[0066] In some embodiments, combined with Figure 4 and Figure 5 There is filter material between the first bottom 32 and the second bottom 42 of the cylinder, as well as between the first side wall 31 and the second side wall 41.

[0067] On the one hand, after the water flows through the first filter outlet 3c into the second filter chamber 4a, it needs to flow towards the second filter outlet 4b of the second filter element 4. The radial gap between the first sidewall 31 and the second sidewall 41, and the axial gap between the first cylinder bottom 32 and the second cylinder bottom 42 are both filled with filter media. This ensures that after the water flows out of the first filter outlet 3c, it must pass through the corresponding filter media layer to reach the second filter outlet 4b, regardless of whether it diffuses from the sidewall or the cylinder bottom. This increases the contact area between the water flow and the filter media, preventing the water from flowing out directly without fully contacting the filter media in the second filter chamber 4a. This ensures that each part of the water flow can fully react with the filter media, making the filtration of residual chlorine more thorough.

[0068] On the other hand, the radial gap between the first sidewall 31 and the second sidewall 41, and the axial gap between the first bottom of the cylinder 32 and the second bottom of the cylinder 42 together constitute the main accommodating space of the second filter chamber 4a. Filling the filter media into these areas can increase the effective filling amount of the filter media within a limited volume, avoid space waste, and at the same time, the reasonable division of areas makes the filter media distribution more uniform, reducing the problem of uneven filtration efficiency caused by local filter media accumulation or gaps.

[0069] In some embodiments, combined with Figure 4 and Figure 5 Along the radial direction of the second filter element 4, there is a first gap 411 between the second sidewall 41 and the inner wall of the filter plug 2.

[0070] The first gap 411 provides radial clearance for the installation of the second filter element 4 within the filter plug 2, reducing the alignment accuracy requirements between the second filter element 4 and the inner wall of the filter plug 2 during assembly and minimizing the risk of friction or jamming during assembly. Furthermore, the gap space facilitates the removal of the second filter element 4 during subsequent maintenance (such as replacing filter media and cleaning filter elements), improving the ease of maintenance of the device.

[0071] In some embodiments, combined with Figure 4 and Figure 5 The second sidewall 41 is provided with a second filter outlet 4b, and there is a second gap 421 between the second cylinder bottom 42 and the bottom wall 21 of the filter plug 2. The first gap 411 and the second gap 421 are connected, and the water outlet end of the filter plug 2 is located on the bottom wall 21 of the filter plug 2.

[0072] After the water flows out from the outlet of the side wall of the second filter element 4, it first enters the first gap 411 between the second side wall 41 and the inner wall of the filter plug 2, then flows into the second gap 421 between the bottom of the second drum 42 and the bottom wall 21 of the filter plug 2, and finally flows out from the outlet of the bottom wall 21. This smoothly guides the water flow out of the washing water purification device 100, avoids water flow blockage, reduces water pressure loss, ensures a stable water flow into the washing machine, and guarantees washing efficiency.

[0073] In some embodiments, combined with Figure 4 and Figure 5 The second bottom of the cylinder 42 is provided with a second filter outlet 4b, and the second filter outlet 4b of the second bottom of the cylinder 42 is connected to the second gap 421.

[0074] Water can flow not only radially (from the outlet of the second sidewall 41) but also axially (from the outlet of the second drum bottom 42), avoiding the limitation of a single outflow path and preventing increased flow resistance caused by partial blockage of the sidewall outlet or water concentration. Even if the flow efficiency of the filter outlet of the second sidewall 41 decreases due to filter media wear or impurity adhesion, water can still flow smoothly into the second gap 421 through the outlet of the second drum bottom 42, ensuring stable overall water flow, reducing water pressure loss, and guaranteeing the water intake efficiency of the washing machine.

[0075] Furthermore, a single sidewall outlet could lead to prolonged concentrated water flow impacting the filter media near the second sidewall 41, causing localized compaction and excessive wear, thus affecting filtration efficiency and service life. A second filter outlet 4b is also provided at the bottom of the second cylinder 42, dispersing the water pressure in both directions—the second sidewall 41 and the bottom of the cylinder 42—reducing the stress on the localized filter media and lowering the risk of structural damage due to long-term impact. Simultaneously, the water flows directly into the second gap 421 through the bottom outlet, shortening the flow path of some water within the second guide channel 2a.

[0076] In some embodiments, combined with Figure 4 , Figures 8 to 10 , Figure 8 This is a schematic diagram of the filter plug 2 disclosed in the embodiments of this application from a first-view perspective. Figure 9 This is a schematic diagram of the filter plug 2 disclosed in the embodiments of this application from a second perspective. Figure 10 for Figure 9 In the cross-sectional view at point BB, the bottom wall 21 of the filter plug 2 is provided with a support structure 23. The support structure 23 is arranged around the water outlet end of the filter plug 2 and abuts against the bottom 42 of the second cylinder. The support structure 23 is provided with a water inlet 23a, which penetrates the support structure 23 radially.

[0077] The support structure 23, through its contact with the bottom of the second cylinder 42, stably confines the second filter element 4 between the filter plug 2 and the connecting plug 1, preventing axial displacement or shaking under the action of water flow. When the user needs to clean or replace the filter element, simply disassemble the filter plug 2; the contact and confinement of the support structure 23 with the second filter element 4 will then be released, allowing the second filter element 4 to be directly removed along with the internal first filter element 3. Since the support structure 23 only achieves confinement through contact, without any additional fastening structure, the disassembly process requires no tools, making the operation simple and efficient.

[0078] The radially penetrating water inlet 23a on the support structure 23 not only provides support but also connects the first gap 411 and the second gap 421. This ensures that water can flow smoothly from the first gap 411 radially through the water inlet 23a into the second gap 421, and then converge at the outlet. This design enhances structural support while avoiding water flow congestion or water pressure loss caused by obstruction by the support structure 23, ensuring a stable water flow into the washing machine and not affecting washing efficiency.

[0079] Optionally, the opening of the first filter element 3 is provided with a flange 33. The flange 33 is partially abutted between the first filter element 3 and the connecting plug 1 along the axial direction, defining the position of the first filter element 3 along the axial direction. Part of the flange 3 is abutted between the second side wall 41 and the first side wall 31 along the radial direction, so that the first filter element 3 and the second filter element 4 form a gap along the radial direction. The structure is simple and effectively defines the position of the first filter element 3 in the second flow channel 2a.

[0080] In some embodiments, combined with Figure 4 The outlet end of the connector 1 is provided with a first baffle 111 and a second baffle 112. The first baffle 111 is annular and is arranged around the first filter element 3. The second baffle 112 is annular and is arranged at intervals on the radial outer side of the first baffle 111. The inlet end of the filter connector 2 is inserted between the second baffle 112 and the first baffle 111, and is connected to the outer surface of the first baffle 111 by a thread.

[0081] The first baffle 111 and the second baffle 112 form an annular nested space, with the water inlet end of the filter plug 2 inserted between them. In the radial direction, the first baffle 111 limits the filter plug 2 from the inside, while the second baffle 112 blocks it from the outside, effectively positioning the filter plug 2. In the axial direction, the threaded connection provides a stable tightening force, ensuring a tight fit between the filter plug 2 and the connecting plug 1, preventing axial loosening or gaps under water pressure, and ensuring the stability of the overall structure of the device during long-term use. Moreover, the labyrinth seal path formed between the first baffle 111, the filter plug 2, and the second baffle 112 increases the flow path of water in the second guide channel 2a to the outside of the device, reducing the possibility of water overflow from the device.

[0082] In some embodiments, combined with Figure 4 and Figure 5 The outlet end of the connector 1 is also provided with a sealing element 113. The flange 33 is provided with an installation groove. The sealing element 113 is installed in the installation groove and is located between the first filter element 3 and the first baffle 111 to seal the gap between the first filter element 3 and the first baffle 111.

[0083] When the washing water purification device 100 is working, water flows from the first guide channel 1a of the connector 1 into the first filter inlet 3b of the first filter element 3. If there is a gap between the first filter element 3 and the water outlet of the connector 1, unfiltered tap water may leak directly into the second guide channel 2a through the gap, bypassing the solid impurity filtration stage of the first filter element 3, causing impurities to enter the washing machine and contaminate the clothes. The sealing element 113 forms a physical barrier by filling the gap, so that all water flows into the first filter chamber 3a after passing through the first filter inlet 3b, ensuring that solid impurities in the water flow remain in the first filter chamber 3a after filtration. Then, the water flows through the second filter chamber 4a for filtration and residual chlorine before entering the washing machine inlet pipe, ensuring the integrity of the filtration process.

[0084] In some embodiments, combined with Figure 4 , Figures 8 to 10 The outer surface of the filter plug 2 is provided with a third baffle 24. The third baffle 24 is arranged around the circumference of the filter plug 2 and is arranged axially opposite to the second baffle 112 with a gap.

[0085] Thus, if water is to leak out of the device, it must pass through the threaded connection gap between the first baffle 111 and the filter plug 2, then through the gap between the second baffle 112 and the filter plug 2, and then through the axial gap between the second baffle 112 and the third baffle 24. The setting of the third baffle 24 further increases the flow path of water in the second guide channel 2a to the outside of the device, reducing the possibility of water overflowing from the device.

[0086] In some embodiments, combined with Figure 4 , Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the connector 1 disclosed in an embodiment of this application. Figure 7 This is an exploded view of the connector 1 disclosed in the embodiment of this application. The connector 1 has an inserted state and a locked state. When the connector 1 is in the inserted state, the connector 1 is configured to be inserted into the water faucet 5. When the connector 1 is in the locked state, the connector 1 is locked to the water faucet 5. In this way, the connector 1 can be quickly inserted and positioned, and can also be easily pulled out.

[0087] In some embodiments, the connector 1 includes a connector body 11, an operating member 12, a locking ball 13, a return spring 14, and a clamp 15, and has a first channel formed inside. The connector body 11 has a locking hole 11a. The operating member 12 is sleeved outside the connector body 11 and can move axially (in the insertion direction) relative to the connector body 11. The axial direction is the extension direction of the first channel. The end of the operating member 12 away from the filter plug 2 has a receiving groove. The locking ball 13 is disposed in the locking hole 11a and is located between the connector body 11 and the operating member 12. When the connector 1 is in the insertion state, the operating member 12 moves axially closer to the connector 1, so that the receiving groove and the locking ball 13 move radially (perpendicular to the insertion direction). Corresponding to the position, the snap-fit ​​ball 13 can move into the receiving groove. When the connector 1 is in the snap-fit ​​state, the snap-fit ​​ball 13 abuts between the operating member 12 and the connector body 11, so that the snap-fit ​​ball 13 is partially exposed on the inner surface of the connector body 11, wherein the radial direction is perpendicular to the axial direction; one end of the return spring 14 abuts against the operating member 12, and the other end abuts against the connector body 11. The return spring 14 is configured so that after the faucet is inserted into the connector body 11, it resets the operating member 12, so that the snap-fit ​​ball 13 snaps against the faucet 5; the clamp 15 is sleeved on the outer surface of the connector body 11 and is located at the end of the connector body 11 away from the filter plug 2. When the connector 1 is in the snap-fit ​​state, the clamp 15 abuts against the receiving groove.

[0088] When the connector 1 is in its natural state, it is in an automatically locked state. The operating element 12 abuts against the clamp 15 under the elastic force of the return spring 14. At this time, the locking ball 13 is positioned within the locking hole 11a under the abutment of the inner wall of the operating element 12. When the washing water purification device 100 needs to be connected to the faucet 5, the connector 1 needs to be switched from the locked state to the plugged state. The user can hold the washing water purification device 100 except for the operating element 12, and move the operating element 12 axially towards the filter plug 2, so that the locking ball 13 corresponds radially to the receiving groove. The locking ball 13 falls into the receiving groove and no longer protrudes from the first flow channel 1a. At this time, the faucet 5 can be smoothly inserted into the first flow channel 1a. After insertion, the user releases the operating element 12. 12 is reset under the axial reset force of the return spring 14 and abuts against the clamp 15. At this time, the inner wall of the operating member 12 abuts against the locking ball 13, so that the locking ball 13 enters the locking hole 11a and abuts against the outer wall of the faucet 5. At this time, the connecting plug 1 is in the locked state. Usually, the faucet 5 is provided with a protruding rib. The locking ball 13 can be locked with the protruding rib along the axial direction to realize the effective connection between the connecting plug 1 and the faucet 5. If the connecting plug 1 is to be removed, the operation of changing from the locked state to the plugged state can be repeated, which will not be described in detail here.

[0089] Optionally, combined Figure 2 and Figure 3The lower end of the connector plug 1 is provided with multiple protrusions 114, which are spaced apart circumferentially. When the user disassembles the filter plug 2 and the connector plug 1, the protrusions 114 can be easily held by the user and rotated at this point, making it easier for the user to disassemble the two plugs and improving the user experience.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A washing water purification device, characterized in that, include: A connector plug, wherein the inlet end of the connector plug is used to connect to a water source, and the connector plug has a first flow guiding channel for guiding water flow through; A filter plug, wherein the inlet end of the filter plug is detachably connected to the outlet end of the connector plug, the outlet end of the filter plug is used to connect to the washing machine inlet pipe, and the filter plug has a second flow guide channel, which is connected to the first flow guide channel; A first filter element is disposed within the second flow channel. The first filter element has a first filter chamber and a first filter inlet and a first filter outlet connected to the first filter chamber. The first filter inlet is connected to the outlet of the first flow channel. The first filter outlet allows the water flow to pass through and prevents impurities in the water flow from passing through. The second filter element is disposed in the second flow channel. The second filter element has a second filter chamber and a second filter outlet connected to the second filter chamber. The second filter outlet is connected to the water outlet of the filter plug. The second filter chamber is provided with filter media, which is used to filter residual chlorine in the water flow. The first filter element extends into the second filter chamber, and the first filter outlet is connected to the second filter chamber, so that the water flow can sequentially pass through the first guide channel, the first filter inlet, the first filter chamber, the first filter outlet, the second filter chamber, the second filter outlet, and the water outlet of the filter plug before entering the washing machine's water inlet pipe.

2. The washing water purification device according to claim 1, characterized in that, Both the first filter element and the second filter element are cylindrical structures with one open end. The opening of the first filter element is the first filter inlet. The cylindrical wall of the first filter element is provided with multiple first filter outlets. The first filter element extends into the second filter chamber from the opening of the second filter element. The cylindrical wall of the second filter element is provided with the second filter outlet.

3. The washing water purification device according to claim 2, characterized in that, The first filter element includes: A first sidewall, wherein one end of the first sidewall along the axial direction forms the first filter inlet, and the first sidewall is provided with the first filter outlet; The first cylinder bottom is connected to the end of the first sidewall away from the first filter inlet, and the first filter outlet is provided on the first cylinder bottom; The second filter element includes: The second sidewall is located radially outside the first sidewall and has a radial gap with the first sidewall; The second cylinder bottom is axially opposite to the first cylinder bottom.

4. The washing water purification device according to claim 3, characterized in that, There is filter material between the first cylinder bottom and the second cylinder bottom, as well as between the first side wall and the second side wall.

5. The washing water purification device according to claim 3, characterized in that, Along the radial direction of the second filter element, there is a first gap between the second sidewall and the inner wall of the filter plug.

6. The washing water purification device according to claim 5, characterized in that, The second sidewall is provided with the second filter outlet, and there is a second gap between the bottom of the second cylinder and the bottom wall of the filter plug. The first gap and the second gap are connected, and the water outlet of the filter plug is located on the bottom wall of the filter plug.

7. The washing water purification device according to claim 6, characterized in that, The second cylinder bottom is provided with the second filter outlet, and the second filter outlet at the bottom of the second cylinder is in communication with the second gap.

8. The washing water purification device according to claim 7, characterized in that, The bottom wall of the filter plug is provided with a support structure, the support structure is arranged around the water outlet end of the filter plug, and the support structure abuts against the bottom of the second cylinder. The support structure is provided with a water inlet, which penetrates the support structure radially.

9. The washing water purification device according to any one of claims 1-7, characterized in that, The outlet end of the connector is equipped with: The first baffle rib is annular and surrounds the first filter element; The second baffle is annular and spaced apart on the radial outer side of the first baffle. The water inlet end of the filter plug is inserted between the second baffle and the first baffle and is connected to the outer surface of the first baffle by a thread. A sealing element is disposed between the first filter element and the first baffle to seal the gap between the first filter element and the first baffle.

10. The washing water purification device according to claim 9, characterized in that, The outer surface of the filter plug is provided with: The third baffle is arranged circumferentially around the filter plug and is axially opposite to the second baffle with a gap between them.

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