Washing machine drainage filtering system and washing machine

Abstract

The present invention discloses a washing machine drainage filter system and a washing machine, wherein the drainage filter system comprises: a drain outlet; a drain pipe; a drain pump connected to the drain pipe, having a pump chamber and an impeller located in the pump chamber; a primary filter device, which is arranged at the drain outlet and is used to filter hard foreign matter; and a secondary filter device, which is arranged between the drain outlet and the pump chamber and is used to filter flexible foreign matter. By setting a primary filter device for filtering hard foreign matter, hard foreign matter such as coins and paper clips are filtered at the drain outlet, thereby preventing hard foreign matter from entering the drain pipe; setting a secondary filter device for filtering flexible foreign matter, thereby filtering flexible foreign matter such as lint and hair, so that the washing water after entering the pump chamber has removed hard and flexible foreign matter; setting two-stage filtration classification to filter foreign matter can effectively prevent foreign matter from entering the washing machine drainage pump, thereby preventing foreign matter from damaging the drainage pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing machines, and in particular relates to a washing machine drainage filter system and a washing machine having the drainage filter system. Background Art

[0002] Conventional pulsator washing machines typically consist of a housing, an outer tub suspended within the housing, and an inner tub housed within the outer tub, driven by an outer shaft. The inner shaft connects to a pulsator at the bottom of the inner tub. A filter is typically located on the inner tub wall, passively filtering lint from the wash water flow. The drainage system includes a drain outlet at the bottom of the outer tub, a drain pipe connected to the outlet, and a drain pump mounted on the pipe. Wash water containing lint and debris can entangle the pump's components. Hard foreign objects such as paper clips, hairpins, or coins in the wash water can easily cause the pump to malfunction.

[0003] Currently, pulsator washing machines with drain pumps use this pump to remove water from the machine, but they lack effective filtration devices. Over time, a large amount of foreign matter can enter the pump, making it difficult to remove. Severe foreign matter can prevent the drain system from discharging wastewater, causing inconvenience and even financial losses to users.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In response to the above-mentioned problems in the prior art, the present invention proposes a washing machine drainage filtration system. By setting up two-stage filtration, it is used to filter hard and soft foreign matter respectively, which can effectively prevent foreign matter from entering the washing machine drainage pump to avoid foreign matter damaging the drain valve.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A washing machine drainage filtration system, comprising:

[0008] A drain outlet is provided at the bottom of the outer tub of the washing machine;

[0009] a drain pipe connected to the drain outlet;

[0010] a drainage pump connected to the drainage pipe, comprising a pump chamber and an impeller located in the pump chamber;

[0011] a primary filtering device, which is provided at the drain outlet and is used to filter hard foreign matter;

[0012] The secondary filtering device is arranged between the drain port and the pump chamber and is used for filtering flexible foreign matter.

[0013] Furthermore, the primary filtering device has an upper end cover and a lower end cover that are interlocked, and a labyrinth-shaped water channel that can filter hard foreign matter is formed between the upper end cover and the lower end cover.

[0014] Furthermore, the end cover has an upper end plate and a plurality of coaxially arranged lower edges extending downwardly from the upper end plate.

[0015] Furthermore, a direct current gap is provided on the lower edge to prevent water from flowing through the maze-shaped water channel.

[0016] Furthermore, the plurality of DC notches on the lower edge are located in the same radial direction.

[0017] Furthermore, the widths of the DC gaps on the multiple lower edges are the same.

[0018] Furthermore, the DC gap is adjacent to the upper end plate.

[0019] Furthermore, the ratio of the width of the DC gap to the radius of the lower edge is 0.06 to 0.3.

[0020] Furthermore, the ratio of the width of the DC gap to the radius of the lower edge is 0.1 to 0.3.

[0021] Furthermore, a first water-permeable hole communicating with each other from top to bottom is opened on the upper end plate.

[0022] Furthermore, the lower end cover has a plurality of upper edges alternately arranged with the lower edges, a lower end tube extending downward along the innermost upper edge, and the lower end of the lower sleeve is located in the drain outlet.

[0023] Furthermore, a connecting plate is provided at the lower ends of the two adjacent upper edges, and the two upper edges and the connecting plate surround to form a sedimentation tank, and the lower end of the lower edge is located in the sedimentation tank.

[0024] Furthermore, a second water-permeable hole communicating with each other from top to bottom is opened on the connecting plate.

[0025] Furthermore, a receiving groove is provided at the bottom of the outer barrel, the drain port is provided at the bottom of the receiving groove, and the primary filtering device is located in the receiving groove.

[0026] Furthermore, the secondary filtering device has a filter cavity, a detachable filter core arranged in the filter cavity, and the filter core has a core frame, a vortex generator arranged on the core frame, and a plurality of spaced-apart retaining columns for filtering flexible foreign matter.

[0027] Furthermore, the filter chamber is adjacent to the pump chamber, and a communication port is provided between the filter chamber and the pump chamber, so that the water in the filter chamber flows through the communication port and then enters the pump chamber.

[0028] Furthermore, the communication port is coaxially arranged with the impeller.

[0029] Furthermore, the drainage pump and the secondary filtering device are an integrated structure.

[0030] Furthermore, the filter cavity has a filter water inlet, and the axial cross-section of the filter water inlet is larger than the axial cross-section of the communication port.

[0031] Furthermore, the core frame has a front frame and a rear frame arranged relatively to each other, the rear frame is provided with a vortex generator extending toward the front frame, and the front frame is provided with a plurality of blocking columns extending toward the rear frame, and the plurality of blocking columns are arranged in an arc shape.

[0032] Furthermore, the vortex generator is located in the middle of the rear frame, the rear frame is in the shape of a circular plate, and the blocking column is located at the edge of the rear frame.

[0033] Furthermore, the plurality of blocking posts are arranged in a semicircular arc shape, and the blocking posts are located on a side of the filter cavity away from the filter water inlet.

[0034] Furthermore, the extension size of the vortex shedder is 1 / 3 of the distance between the front frame and the rear frame, and the extension length of the blocking column is 2 / 3 of the distance between the front frame and the rear frame.

[0035] Based on the above-mentioned drainage filtration system for a washing machine, the present invention also provides a washing machine having the above-mentioned drainage filtration system. By setting up two-stage filtration, which is used to filter hard and soft foreign objects respectively, it can effectively prevent foreign objects from entering the drainage pump of the washing machine to avoid foreign objects damaging the drain valve.

[0036] A washing machine comprises the above-mentioned drainage filtering system.

[0037] Compared with the prior art, the advantages and positive effects of the present invention are: by setting a first-level filtering device to filter hard foreign objects, hard foreign objects such as coins and paper clips are filtered at the drain outlet, preventing hard foreign objects from entering the drain pipe; a second-level filtering device is set in the water path between the drain outlet and the pump cavity to filter soft foreign objects, filtering soft foreign objects such as lint and hair, so that the washing water after entering the pump cavity has removed hard and soft foreign objects; two-stage filtering classification is set to filter foreign objects, effectively filtering foreign objects, and effectively preventing foreign objects from entering the washing machine drain pump to avoid foreign objects damaging the drain pump.

[0038] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 This is a schematic structural diagram of an embodiment of a washing machine drainage filtration system proposed by the present invention;

[0041] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at the middle drain outlet;

[0042] Figure 3 for Figure 2 Schematic diagram of the structure of the middle-level filtration device;

[0043] Figure 4 for Figure 3 Schematic diagram of the structure on the middle end cover;

[0044] Figure 5 for Figure 4 A schematic diagram of the structure from another angle;

[0045] Figure 6 for Figure 3 Schematic diagram of the structure under the middle end cover;

[0046] Figure 7 for Figure 6 A schematic diagram of the structure from another angle;

[0047] Figure 8 for Figure 1 Schematic diagram of the structure of the middle and outer barrels;

[0048] Figure 9 for Figure 1 Schematic diagram of the structure of the drainage pump and secondary filtration device;

[0049] Figure 10 for Figure 9 A cross-sectional view along the axial direction of the drainage pump;

[0050] Figure 11 for Figure 9 Schematic diagram of the structure of the middle filter element;

[0051] Figure 12 for Figure 11 Schematic diagram of the structure from another angle. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0053] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the positional relationships shown in the accompanying drawings. In normal use, the direction close to the user is "front", and the opposite is "back". The terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] See also Figures 1-12, an embodiment of a washing machine drainage filter system proposed by the present invention, a washing machine drainage filter system includes: a drain outlet 10, a drain pipe 20, a drain pump 30, a primary filter device 40 and a secondary filter device 50, the drain outlet 10 is opened at the bottom of the washing machine outer barrel 100, the drain pipe 20 is connected to the drain outlet 10, and is used to discharge the washing water in the outer barrel 100; the drain pump 30 is connected to the drain pipe 20, the drain pump 30 has a pump cavity 31 and an impeller 32 located in the pump cavity 31; the primary filter device 40 is arranged at the drain outlet 10, and the primary filter device 40 is used to filter hard foreign matter; the secondary filter device 50 is arranged between the drain outlet 10 and the pump cavity 31, that is, arranged on the waterway between the drain outlet 10 and the pump cavity 31, and the secondary filter device 50 is used to filter soft foreign matter. A primary filter device 40 is provided to filter hard foreign matter, such as coins and paper clips, at the drain outlet, preventing them from entering the drain pipe. A secondary filter device 50 is provided in the water path between the drain outlet 10 and the pump chamber 31 to filter soft foreign matter, such as lint and hair. This ensures that the wash water entering the pump chamber is free of both hard and soft foreign matter. This two-stage filtration provides targeted and effective foreign matter filtration, effectively preventing foreign matter from entering the washing machine's drain pump and potentially damaging it.

[0056] See also Figure 8 As shown, a receiving groove 101 is provided at the bottom of the outer barrel 100 , a drain outlet 10 is provided at the bottom of the receiving groove 101 , and the primary filter device 40 is located in the receiving groove 101 ; by providing the receiving groove 101 , it is convenient to accommodate the primary filter device 40 .

[0057] In this embodiment, see Figure 2-Figure 7 As shown, the primary filtration device 40 comprises an interlocking upper end cap 41 and a lower end cap 42. A labyrinthine waterway 43 is formed between the upper and lower end caps 41 and 42 to filter hard foreign matter. This creates an S-shaped waterway in the vertical direction, filtering hard foreign matter such as coins and paper clips. The labyrinthine waterway 43 has smaller vertical dimensions, preventing larger hard foreign matter from entering. Smaller hard foreign matter settles as it flows upward and downward in the S-shaped pattern. Flexible foreign matter can flow through the labyrinthine waterway 43 with the water.

[0058] The end cover 41 has an upper end plate 411 and a plurality of coaxially arranged annular lower edges 412 extending downward along the upper end plate 411; the lower end cover 42 has a plurality of upper edges 421 alternately arranged with the lower edges 412, and a lower end tube 422 extending downward along the innermost upper edge 421, and the lower end of the lower sleeve 422 is located in the drain outlet 10. The upper end cap 41 is buckled onto the lower end cap 42. The lower edges 412 and upper edges 421 are alternately arranged in the radially outward direction. The lower end surface of the lower edge 412 is lower than the upper end surface of the upper edge 421. Water flows radially inward; it flows downward from the gap between the edge of the upper end cap 41 and the receiving groove 101 into the receiving groove 101, and flows downward under the outermost lower edge 412. Then it flows upward between the outermost lower edge 412 and the outermost upper edge 421 to pass over the outer upper edge 421; then it flows downward between the outermost upper edge 421 and the inwardly adjacent lower edge 412 to pass over the lower edge 412. The water flows inward in sequence, and finally flows downward along the lower end pipe 422 to pass through the drain outlet 10. Hard foreign matter is filtered out during the process of flowing through the primary filter device 40.

[0059] A connecting plate 423 is provided at the lower ends of the two adjacent upper edges 421. The two adjacent upper edges 421 and the connecting plate 423 connected to the two upper edges 421 surround to form a sedimentation trough 424. When the water flows through the maze-shaped waterway 43 in the up and down directions, the speed of the water flow slows down, so that the hard and dense foreign matter carried in the water flow will settle in the sedimentation trough 424, and the lower end of the lower edge 412 extends into the sedimentation trough 423 to form a maze-shaped waterway 43.

[0060] A direct current notch 4121 is provided on the lower edge 412 to prevent water from flowing through the labyrinthine waterway 43. This improves the flow rate and efficiency of the water flow and prevents water from collecting in the labyrinthine waterway 43. Preferably, direct current notches 4121 are provided on all lower edges 412, with multiple direct current notches 4121 forming a direct current waterway. When water flows through the primary filter device 40, the majority of the water flows through the labyrinthine waterway 43, blocking or settling hard foreign matter and filtering it out. A small portion of the water flows through the direct current waterway, which helps increase the water flow rate and ensures that it passes through the primary filter device 40 as quickly as possible.

[0061] Preferably, the multiple DC notches 4121 on the lower edge 412 are located in the same radial direction, allowing water to flow radially from the outside to the inside, minimizing the length of the DC channel and further improving drainage efficiency. The DC notches 4121 are relatively narrow, so the vast majority of the water flows inward from the circumference through the labyrinthine waterway 43, with only a small portion flowing through the DC notches 4121. Furthermore, the narrow width of the DC notches 4121 prevents hard foreign objects such as coins and paper clips from being trapped outside the DC notches 4121, allowing hard foreign objects larger than the width of the DC notches 4121 to be filtered out of the water flowing through the DC notches 4121. The ratio of the width of the DC notches 4121 to the radius of the lower edge 412 is 0.06 to 0.3. Preferably, the ratio of the width of the DC notches 4121 to the radius of the lower edge 412 is 0.1 to 0.3.

[0062] Preferably, the widths of the plurality of direct current slots 4121 on the lower edge 412 are the same, so that the same amount of water can flow through each direct current slot 4121, which facilitates a stable flow of water through the direct current channel. The direct current slots 4121 are adjacent to the upper end plate 411, that is, the direct current slots 4121 are opened upwardly to enlarge the size.

[0063] The upper end plate 411 is provided with a plurality of first water-permeable holes 4111, which communicate vertically with each other. This allows a portion of the water to flow directly through the first water-permeable holes 4111 into the labyrinthine waterway 43 or the drain outlet 10, adding another path for the water flowing through the primary filter device 40 within the outer tub 100. The first water-permeable holes 4111 are provided primarily to allow residual water within the outer tub 100 to flow out. The water flowing through the primary filter device 40 within the outer tub 100 partially flows radially inward through the labyrinthine waterway 43; partially flows radially inward through the straight waterway; and partially flows directly downward through the first water-permeable holes 4111.

[0064] The diameter of the first water-permeable hole 4111 is preferably set to be equal to or smaller than the width of the direct current notch 4121. This allows hard foreign matter larger than the diameter of the first water-permeable hole 4111 to be filtered out of the water flowing downward from the first water-permeable hole 4111. This also allows the water flowing through the first water-permeable hole 4111 to filter out hard foreign matter. This ensures that all water flowing through the primary filter device 40 is free of hard foreign matter.

[0065] A second water hole 4231 is formed on the connecting plate 423, which is connected to each other from top to bottom and is mainly used to flow out the water remaining in the sedimentation tank 424. The diameter of the second water hole 4231 is smaller than or equal to the diameter of the first water hole 4111.

[0066] See also Figures 9-12As shown, the secondary filtration device 50 comprises a filter chamber 51 and a removable filter element 52 disposed within the filter chamber 51. The filter element 52 comprises a core frame 521, a vortex generator 522 disposed on the core frame 521, and a plurality of spaced-apart retaining posts 523 for filtering flexible foreign matter. The vortex generators 522 are provided. According to the Karman vortex principle, the water flowing through the vortex generators 522 generates vortices, causing flexible foreign matter in the water to rotate along with the water. The rotating water flows through the retaining posts 523, causing the flexible foreign matter to become entangled around the retaining posts 523, thereby filtering flexible foreign matter such as lint and hair. The provision of the vortex generators 522 is beneficial for improving the filtering capability for flexible foreign matter. Preferably, the retaining posts 523 are disposed within the range where the water vortex is generated by the vortex generators 522. That is, the water rotates at the plurality of retaining posts 523, causing the flexible foreign matter to become entangled around the retaining posts 523.

[0067] The core frame 521 comprises a front frame 5211 and a rear frame 5212, which are positioned opposite each other. The rear frame 5212 is provided with a vortex shedder 522 extending toward the front frame 5211. The front frame 5211 is also provided with a plurality of retaining posts 523 extending toward the rear frame 5212. The retaining posts 523 are arranged in an arc. Both the front frame 5211 and the rear frame 5212 are circular, with the vortex shedder 522 located in the middle of the rear frame 5212. The rear frame 5212 is disc-shaped, with the retaining posts 523 located at its edges.

[0068] In this embodiment, the drain pump 30 and the secondary filter device 50 are integrated into one structure. The filter chamber 51 is positioned adjacent to the pump chamber 31. A communication port 512 is defined between the filter chamber 51 and the pump chamber 31. Water within the filter chamber 51 flows through the communication port 512 and enters the pump chamber 31. The communication port 512 serves as both the outlet of the filter chamber 51 and the inlet of the pump chamber 31. The integrated structure of the drain pump 30 and the secondary filter device 50 simplifies the structure, avoids the need for a connecting pipe between the drain pump 30 and the secondary filter device 50, and speeds up installation.

[0069] In other embodiments, the drainage pump 30 and the secondary filtering device 50 may also be provided as independent separate structures.

[0070] The filter chamber 51 has a filter water inlet 511 located in the middle of the filter element 521 in the front-to-back direction. A barrier post 523 is located on the side of the filter chamber 51 away from the filter water inlet 511. Water flows into the filter chamber 51 through the filter water inlet 511, passes through the vortex shedder 522, and then reaches the barrier post 523.

[0071] The axial cross-section of the filtered water inlet 511 is larger than the axial cross-section of the communication port 512. In other words, the diameter of the filtered water inlet 511 is larger than the diameter of the communication port 512. This facilitates the rotation and filtration of the water flow within the filter chamber 51. The communication port 512 is coaxially disposed with the impeller 32. The communication port 512 is disposed on the rear side of the rear frame 5212, or in other words, on the rear side of the filter element 52.

[0072] The extended dimension of the vortex shedder 522 is 1 / 3 of the distance between the front frame 5211 and the rear frame 5212 , and the extended length of the blocking column 523 is 2 / 3 of the distance between the front frame 5211 and the rear frame 5212 .

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A washing machine drainage filtration system, characterized in that: include: A drain outlet is provided at the bottom of the outer tub of the washing machine; a drain pipe connected to the drain outlet; a drainage pump connected to the drainage pipe, comprising a pump chamber and an impeller located in the pump chamber; a primary filtering device, which is provided at the drain outlet and is used to filter hard foreign matter; a secondary filtering device, which is disposed between the drain port and the pump chamber and is used to filter flexible foreign matter; The primary filtering device comprises an upper end cap and a lower end cap which are interlocked, forming a labyrinth-shaped water channel between the upper end cap and the lower end cap for filtering hard foreign matter; the end cap comprises an upper end plate and a plurality of coaxially arranged annular lower edges extending downwardly from the upper end plate; A direct current notch is provided on the lower edge to prevent water from flowing through the labyrinth-shaped water channel; and a plurality of direct current notches on the lower edge are located in the same radial direction.

2. The drainage filtration system according to claim 1, characterized in that: The end cover is provided with a plurality of upper edges alternately arranged with the lower edges, and a lower end tube extending downwardly along the innermost upper edge, and the lower end of the lower end tube is located in the drain port.

3. The drainage filtration system according to claim 1 or 2, characterized in that: The secondary filtering device comprises a filter cavity, a detachable filter core arranged in the filter cavity, and the filter core comprises a core frame, a vortex generator arranged on the core frame, and a plurality of spaced-apart blocking columns for filtering flexible foreign matter.

4. The drainage filtration system according to claim 3, characterized in that: The filter cavity is adjacent to the pump cavity, and a communication port is provided between the filter cavity and the pump cavity. The water in the filter cavity flows through the communication port and then enters the pump cavity.

5. The drainage filtration system according to claim 3, characterized in that: The core frame comprises a front frame and a rear frame which are arranged opposite to each other. The rear frame is provided with a vortex generator extending toward the front frame. The front frame is provided with a plurality of blocking columns extending toward the rear frame. The plurality of blocking columns are arranged in an arc shape.

6. The drainage filtration system according to claim 5, characterized in that: The extension size of the vortex shedder is 1 / 3 of the distance between the front frame and the rear frame, and the extension length of the blocking column is 2 / 3 of the distance between the front frame and the rear frame.

7. A washing machine, characterized in that: A drainage filtration system comprising the drainage filtration system according to any one of claims 1 to 6.

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