Filter cleaning system and laundry treatment apparatus including same

Abstract

The present invention relates to a filter cleaning system and a laundry treatment apparatus including same, wherein a portion of drained water is recovered to perform filter cleaning. The present invention according to one embodiment comprises: a filter for filtering foreign substances; a drain flow path for draining water filtered from the filter; and a recovery flow path for recovering at least a portion of a fluid drained into the drain flow path and supplying same to the filter.

Description

Filter cleaning system and laundry treatment device including the same

[0001] The present invention relates to a filter cleaning system and a laundry treatment device including the same.

[0002] In general, a laundry treatment device is a device that processes laundry by applying physical and chemical actions to the laundry.

[0003] The laundry treatment device may include a tub that is received in a suspended form by the interior of the cabinet, a drum that rotates within the tub while receiving laundry (or fabric), and a filter that removes contaminants.

[0004] The above contaminants may include contaminants on the laundry and microplastics, detergents, and fiber particles generated during the washing process.

[0005] During the washing process, laundry inside the drum rotates or falls due to the rotation of the drum, which may cause friction between laundry items.

[0006] As technological advancements improve washing performance and increase the mechanical power transferred to laundry, friction between laundry items can cause microplastics to separate from the laundry, increasing the amount of separated microplastics. Furthermore, these microplastics are discharged with the drained washwater, causing serious environmental pollution.

[0007] Typically, water used to wash laundry passes through the filter to remove contaminants before being drained. This filter requires regular cleaning, and contaminants build up in the filter, reducing its filtration capacity.

[0008] In addition, if contaminants accumulate in the filter, there is a problem of poor drainage and the lifespan of the filter is shortened.

[0009] Therefore, periodic cleaning or replacement of the filter is required, and the frequent cleaning or replacement of the filter not only causes inconvenience to the user, but also increases the cost of filter replacement.

[0010] Meanwhile, conventionally, when drainage is not smooth, a bypass channel is added to allow water to drain without passing through the filter. This approach increases the volume of the bypass channel and requires additional processes to assess the filter's filtration capacity, leading to structural complexity. Furthermore, since the water is discharged without passing through the filter, foreign substances are discharged unfiltered, potentially causing environmental pollution.

[0011] Prior art document 1 (Korean Patent Publication No. 2018-0103515) discloses a washing unit for washing a filter unit and a control method thereof, but does not disclose a technology for washing the filter by recovering a portion of the wastewater that has passed through the filter.

[0012] Prior art document 2 (Korean Patent Publication No. 2018-0103515) discloses a washing machine equipped with a foreign matter collection device located on a drainage path, but does not disclose a technology for recovering a portion of the drainage water passing through the filter and washing the filter.

[0013] The purpose of the present invention is to provide a filter cleaning system capable of extending the life of a filter through filter cleaning and increasing the filter replacement or cleaning cycle by a user, and a laundry treatment device including the same.

[0014] In addition, optionally or additionally, it is an object of the present invention to provide a filter washing system and a laundry treatment device including the same, which can maintain or reduce water usage even when additional filter washing is performed.

[0015] In addition, optionally or additionally, an object of the present invention is to provide a filter washing system and a laundry treatment device including the same, which can perform filter washing simultaneously during drainage so that drainage can proceed smoothly without blockage.

[0016] In addition, optionally or additionally, an object of the present invention is to provide a filter cleaning system and a laundry treatment device including the same, which prevents gas flowing inside a pipe from gathering to form an air chamber, thereby facilitating the flow of water on a return path or a drain path for filter cleaning.

[0017] The filter cleaning system of the present invention and the laundry treatment device including the same may include a filter for filtering foreign substances, a filter case for accommodating the filter, a drainage channel through which fluid filtered of foreign substances by the filter is drained, and a recovery channel connected to the drainage channel and provided such that at least a portion of the fluid flowing in the drainage channel flows into the filter case.

[0018] Additionally, the drainage path may include a first pipe having one end connected to the filter case; and a connector connected to the first pipe.

[0019] Additionally, the recovery path may include a second pipe connected to the filter case.

[0020] Additionally, the second pipe can be connected to either the first pipe or the connector.

[0021] Additionally, the connector may include a main body portion connected to the first pipe, and a branch portion branched from the main body portion and connected to the second pipe.

[0022] Additionally, the main body may include an inlet portion coupled to the first pipe, an extension portion extending from the inlet portion, and an outlet portion located on the side of the extension portion opposite to the inlet portion.

[0023] Additionally, the extension portion may be connected to the branch portion and have a connecting hole formed through which water passes.

[0024] Additionally, the branch portion may extend from the main body portion in a direction intersecting the longitudinal direction of the main body portion.

[0025] Additionally, the branch portion may extend downward from the side of the main body portion.

[0026] Additionally, the main body portion can be extended in a horizontal direction.

[0027] Additionally, the branch portion may extend from a side surface of the main body portion located lower than the longitudinal axis of the main body portion.

[0028] Additionally, the branch portion may be extended at an angle to form an acute angle with the longitudinal axis of the main body portion.

[0029] Additionally, the main body portion can be extended in the vertical direction.

[0030] Additionally, the branch portion may extend so as to be inclined toward the upstream side of the main body portion.

[0031] Additionally, the main body portion may be extended and tilted to form an acute angle with the direction of gravity.

[0032] Additionally, the connector may further include a guide disposed inside the connector.

[0033] In addition, the guide may be connected to the main body and guide at least a portion of the water flowing into the main body to flow to the branch.

[0034] Additionally, the guide may be positioned on the upper side based on the longitudinal axis of the branch portion.

[0035] Additionally, one end of the guide may be arranged to be in contact with the inner surface of the main body and parallel to the extension of the longitudinal axis of the branch portion.

[0036] Additionally, one end of the guide may be arranged to be in contact with the inner surface of the main body and intersect with an extension of the longitudinal axis of the branch portion.

[0037] Additionally, the guide may include a head portion extending in a direction intersecting the extension direction of the main body portion and a support portion extending from the head portion toward the upstream side based on the direction of water flow.

[0038] Additionally, it may include a sleeve extending in a direction intersecting the longitudinal direction of the filter case.

[0039] Additionally, the other end of the second pipe may include a connecting portion formed in a shape corresponding to the sleeve and connected thereto.

[0040] Additionally, the filter may include a washing unit that is washed by water introduced through the second pipe.

[0041] Additionally, the washing unit may be positioned to correspond to the sleeve.

[0042] Additionally, the above-mentioned joint and the above-mentioned sleeve may each be provided in multiple numbers.

[0043] Additionally, the above washing sections may be formed in multiple pieces spaced apart from each other.

[0044] The above filter may include a filtering unit that filters foreign substances and a frame that supports the outer shape of the filtering unit.

[0045] Additionally, the washing unit may be formed in the filter unit.

[0046] The laundry treatment device of the present invention may further include a cabinet, a tub accommodated in the cabinet and storing laundry water, and a drum positioned in the tub and containing laundry.

[0047] In addition, the laundry treatment device of the present invention may further include a pump that flows fluid on a recovery path or a drain path for washing the filter.

[0048] According to the filter cleaning system of the present invention and the laundry treatment device including the same, there is an advantage in that the filter can be automatically cleaned during the filtration and drainage process.

[0049] Additionally, since the filter is washed when used, it has the advantage of extending the life of the filter.

[0050] Additionally, it has the advantage of being able to increase the frequency of filter replacement or cleaning by the user.

[0051] Additionally, there is an advantage in that water can be saved by reusing the water that has passed through the filter to wash the filter, so there is no need to supply water separately for washing the filter.

[0052] In addition, since the filter is washed while filtration is in progress, there is an advantage in that drainage can proceed smoothly without being blocked.

[0053] In addition, it has the advantage of facilitating the flow of water in the return path or drain path for filter cleaning, as it can prevent gases flowing inside the pipe from gathering and forming an air chamber.

[0054] Additionally, it has the advantage of preventing the performance of the pump from deteriorating due to the formation of an air chamber.

[0055] FIG. 1 is a perspective view of a laundry treatment device according to one embodiment of the present invention.

[0056] FIG. 2 is a perspective view showing the inside of a laundry treatment device according to one embodiment of the present invention.

[0057] FIG. 3 is a perspective view of a filter cleaning system according to one embodiment of the present invention.

[0058] Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3.

[0059] Figure 5 is a cross-sectional view taken along line 5-5 of Figure 3.

[0060] FIG. 6 is a cross-sectional view of a filter cleaning system according to another embodiment of the present invention, taken at a position corresponding to 5-5 of FIG. 3.

[0061] Figure 7 is an exploded perspective view of a filter unit according to one embodiment of the present invention as viewed from above.

[0062] Figure 8 is a drawing showing a connector, which is a main component of the present invention.

[0063] Figure 9 is a cross-sectional view of Figure 8.

[0064] Fig. 10 is a cross-sectional view of another embodiment of a connector, which is a main component of the present invention.

[0065] Fig. 11 is a cross-sectional view of another embodiment of a connector, which is a main component of the present invention.

[0066] Figure 12 is a top view of Figure 8.

[0067] Fig. 13 is a drawing showing one embodiment of a guide, which is a main component of the present invention.

[0068] Fig. 14 is a drawing showing another embodiment of a guide, which is a main component of the present invention.

[0069] Fig. 15 is a drawing showing another embodiment of a guide, which is a main component of the present invention.

[0070] Figure 16 is a cross-sectional view of a connector and a guide, which are the main components of the present invention, and is a drawing showing the arrangement relationship and flow of the connector and the guide according to one embodiment.

[0071] Fig. 17 is a cross-sectional view of a connector and a guide, which are the main components of the present invention, and is a drawing showing the arrangement relationship of the connector and the guide according to another embodiment.

[0072] Fig. 18 is a cross-sectional view of a connector and a guide, which are the main components of the present invention, and is a drawing showing the arrangement relationship of the connector and the guide according to another embodiment.

[0073] Figure 19 is a drawing showing gas flowing within a connector, which is a main component of the present invention.

[0074] Hereinafter, some embodiments of the present invention will be described in detail with exemplary drawings.

[0075] FIG. 1 is a perspective view of a laundry treatment device according to one embodiment of the present invention.

[0076] Referring to FIG. 1, a laundry treatment device (1) according to one embodiment may include a cabinet (100) forming an outer shape. The cabinet (100) may be formed by a single member or by combining multiple members.

[0077] The above cabinet (100) includes a front panel (110) forming the front of the cabinet (100) and an upper panel (120) forming the upper surface of the cabinet (100).

[0078] Meanwhile, in the case of the up-down direction mentioned in this description, the direction toward the floor surface on which the laundry treatment device (1) of the present invention is placed is downward, and the direction opposite to the down direction can be defined as upward. In other words, in one embodiment, the X-axis direction may be the left-right direction of the laundry treatment device (1), the Y-axis direction may be the front-back direction of the laundry treatment device (1), and the Z-axis direction may be the up-down direction of the laundry treatment device (1).

[0079] The laundry treatment device (1) may further include a door (140). The door (140) may be coupled to the front panel (110). The door (140) may open and close the space inside the cabinet (100).

[0080] The laundry treatment device (1) may further include a filter cover (130). The filter cover (130) may be coupled to the front panel (110).

[0081] The above filter cover (130) can open and close a filter opening (not shown) formed in the front panel (110) at a position corresponding to the front and rear direction of the filter unit (400) described below.

[0082] FIG. 2 is a perspective view showing the inside of a laundry treatment device according to one embodiment of the present invention, and FIG. 3 is a perspective view of a filter cleaning system according to one embodiment of the present invention.

[0083] Referring to FIGS. 2 and 3, the laundry treatment device (1) may further include a tub (300) disposed inside the cabinet (100). If the laundry treatment device (1) is a washing machine, the tub (300) may be filled with washing water.

[0084] The laundry treatment device (1) may further include a drum disposed within the tub (300) to accommodate laundry. The drum may include an opening through which laundry may be introduced into or withdrawn from the drum. The opening may be opened or closed by the door (140).

[0085] In addition, the laundry treatment device (1) may include a first hose (310) that supplies water to the tub (300) and a second hose that discharges water from the tub (300).

[0086] The water that flows into the tub (300) through the first hose (310) is discharged through the second hose after washing the laundry, and the water discharged through the second hose can be circulated to the tub (300) through the circulation filter (4130) by the circulation pump (4150).

[0087] A filter cleaning system according to one embodiment includes a filter unit (400) and a flow unit (500).

[0088] The above filter cleaning system may be accommodated within the cabinet (100) and positioned at the lower side of the tub (300). This is an example, and the location of the filter cleaning system is not limited thereto.

[0089] As will be described later, the filter unit (400) may include a filter that removes foreign substances or contaminants and a filter case (4120, 4220) in which the filter is accommodated.

[0090] The above filter may be a drain filter (4230) that filters foreign substances before the wash water is drained.

[0091] Additionally, the filter may be a circulation filter (4130, see FIG. 7) that removes contaminants or foreign substances on the circulation path supplied to the above-described tub (300).

[0092] In addition, the filter may be provided in multiple units and may include a drain filter (4230) and a circulation filter (4130). The foreign substances filtered by the circulation filter (4130) may be larger than the foreign substances filtered by the drain filter (4230).

[0093] The above filter case (4120, 4220) may include a drain filter case (4220) that accommodates a drain filter (4230) therein.

[0094] The above filter case (4120, 4220) may include a circulation filter case (4120) that accommodates the circulation filter (4130) therein.

[0095] The above drain filter case (4220) and the above circulation filter case (4120) may be combined with each other to form a space that communicates so that fluid can flow, or may be formed integrally to form a space that communicates so that fluid can flow. Alternatively, the above drain filter case (4220) and the above circulation filter case (4120) may be formed separately and may be spaced apart from each other.

[0096] The above circulation filter (4130) and the above drain filter (4230) may be defined as a first filter (4130) and a second filter (4230), respectively. The above circulation filter case (4120) and the above drain filter case (4230) may be defined as a first filter case (4120) and a second filter case (4220), respectively.

[0097] For example, the circulation filter (4130) may be a lint filter that filters foreign substances having a size larger than that of foreign substances filtered by the drain filter (4230).

[0098] Meanwhile, a filter cleaning system according to an embodiment of the present invention, which will be described later, will be described based on an embodiment in which the first filter case (4130) and the second filter case (4230) are formed to communicate with each other, and the second filter (4230) is cleaned by a recovery path. However, the first filter case (4120) and the second filter case (4220) may also be separated and placed at spaced locations, and a duplicate description will be omitted.

[0099] In addition, the first filter (4130) may also be a filter washed in a filter washing system according to one embodiment. In addition, the filter washing system of the present invention may be provided with one or more filters and one or more recovery channels, so that the one or more filters and the one or more recovery channels correspond one-to-one, one-to-many, or many-to-many.

[0100] The filter unit (400) may further include a first handle (4110) that opens and closes a hole formed in the front of the first filter case (4120). In addition, the filter unit (400) may further include a second handle (4210) that opens and closes a hole formed in the front of the second filter case (4220).

[0101] In addition, the filter unit (400) may further include an inlet (430) and an outlet (440, 460). The inlet (430) is connected to the second filter case (4220), and the fluid passing through the tub (300) may be discharged and introduced into the filter unit. In addition, the outlets (440, 460) may include a first outlet (440) and a second outlet (460). The first outlet (440) is connected to the first filter case (4120), and the fluid passing through the filter unit (400) may flow and be supplied to the tub (300). The above second outlet (460) is connected to the second filter case (4220), and the fluid passing through the filter unit (400) can flow and flow out to the first pipe (510) described later.

[0102] Meanwhile, the above-mentioned euro section (500) includes a first pipe (510) and a second pipe (520).

[0103] The first pipe (510) forms a space in which the fluid that has passed through the second filter (4230) flows, and the second pipe (520) forms a space in which at least a portion of the fluid that has passed through the first pipe (510) flows.

[0104] The fluid flowing through the first pipe (510) may be laundry water used in the laundry treatment device (1) of the present invention.

[0105] The second pipe (520) may be connected to the first pipe (510). In addition, the second pipe (520) may be connected to the second filter case (4220).

[0106] For example, the first pipe (510) and the second pipe (520) may be formed in a cylindrical shape.

[0107] The diameter of the first pipe (510) may be larger than the diameter of the second pipe (520).

[0108] A filter cleaning system according to one embodiment of the present invention may further include a connector (600).

[0109] The connector (600) can connect the first pipe (510) and the second pipe (520) so as to cause at least a portion of the fluid introduced through the first pipe (510) to flow into the second pipe (520).

[0110] The first pipe (510) and the connector (600) may be defined as a drainage path through which the fluid filtered through the filter unit (400) is drained. In addition, the second pipe (520) may be defined as a recovery path through which at least a portion of the fluid is recovered from the drainage path and flows to the filter unit (400).

[0111] The above connector (600) can be fixed to the cabinet (100) by a fixing member (150).

[0112] One end of the first pipe (510) may be connected to the second filter case (4220), and the other end may be connected to the connector (600). In addition, one end of the second pipe (520) may be connected to the connector (600), and the other end may be connected to the second filter case (4220).

[0113] Within the second filter case (4220), at least a portion of the fluid from which foreign substances or contaminants have been filtered by the second filter (4230) may flow sequentially through the first pipe (510), the connector (600), and the second pipe (520) and be returned to the second filter case (4220) and circulated.

[0114] And, at least a part of the second filter (4230) can be washed by the fluid flowing to the second filter case (4220) through the second pipe (520).

[0115] Accordingly, since the filter is washed simultaneously or sequentially while the above drainage process is performed, the filterable area of ​​the filter can be maintained.

[0116] Meanwhile, FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3, FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3, FIG. 6 is a cross-sectional view taken along line 5-5 of FIG. 3 of a filter cleaning system according to another embodiment of the present invention, and FIG. 7 is an exploded perspective view of a filter unit according to one embodiment of the present invention as viewed from above.

[0117] Referring to FIGS. 4 to 7, the process and structure of cleaning a filter according to a filter cleaning system of one embodiment will be described. In the filter cleaning system illustrated in FIGS. 4 to 6, some structures for coupling between components are illustrated with the components omitted.

[0118] Referring to Fig. 4, the other end of the first pipe (510) may be connected to the lower portion of the connector. The connector (600) may include a main body (610, see Fig. 8) connected to the other end of the first pipe (510), and a branch portion (620, see Fig. 8) branching from the main body (610).

[0119] The main body (610) and the branch portion (620) may have a cylindrical shape. In addition, the outer diameter of the main body (610) may be formed in a size and shape corresponding to the inner diameter of the other end of the first pipe (510).

[0120] And, the lower part of the main body (610) can be accommodated and fixed inside the other end of the first pipe (510).

[0121] Additionally, the branch portion (620) can be combined with one end of the second pipe (520).

[0122] The above branch portion (620) may have a cylindrical shape. In addition, the outer diameter of the branch portion (620) may be formed in a size and shape corresponding to the inner diameter of one end of the second pipe (520).

[0123] And, the lower part of the branch portion (620) can be accommodated and fixed inside one end of the second pipe (520).

[0124] Referring to FIGS. 5 and 7, the second filter (4230) may include a filter frame (4231) and a filtering unit (4232).

[0125] The above filter frame (4231) may be provided to support the filter unit (4232). The shapes of the filter unit (4232) and the filter frame (4231) are exemplary and may be provided with various materials and shapes.

[0126] The other end of the second pipe (520) may be defined as a connecting portion (5201). The connecting portion (5201) may be connected to a sleeve (4221) formed in the filter case (4220).

[0127] The outer diameter of the sleeve (4221) may be formed to have a size and shape corresponding to the inner diameter of the coupling portion (5201). Accordingly, the sleeve (4221) may be accommodated and coupled into the coupling portion (5201).

[0128] The above-mentioned joint (5201) and the sleeve (4221) can be sealed while being coupled to each other to prevent fluid from leaking into the sleeve (4221) through the second pipe (520).

[0129] The filter (5230) can be washed by the fluid introduced into the sleeve (4221) through the above-mentioned connecting portion (5201). Here, the filter may include a washing portion (4233) that is washed by the fluid introduced through the second pipe (520).

[0130] The above washing part (4233) may be formed on the surface of the second filter (4230), and may be a position where the washing path through the second pipe (520) strikes the surface of the filter.

[0131] The above washing section (4233) is formed at a position corresponding to the sleeve (4221) and can be formed with an area equal to or larger than the area formed by the sleeve (4221).

[0132] The above sleeve (4221) and the above washing part (4233) can overlap in the vertical direction or horizontal direction.

[0133] Meanwhile, the first filter (4130) may include a frame, and a mesh may be combined with the frame. Alternatively, the first filter (4130) may further include a filtering unit in the form of a net or mesh supported by the frame, and a mesh may be formed in the filtering unit.

[0134] The filtering portion (4232) of the second filter (4230) may be a net or mesh formed with a mesh. The meshes of the first filter (4130) and the second filter (4230) may refer to holes through which substances may pass, and depending on the size of the mesh, fluids may pass through but foreign substances may not pass through. In other words, the smaller the mesh size, the smaller the size of foreign substances that may pass through, and the smaller the mesh size, the more small particles of foreign substances may be filtered.

[0135] The size of the pores of the first mesh (4130a) constituting the first filter (4130) may be larger than the size of the pores of the second mesh (4232a) constituting the second filter (4230). Accordingly, the size of foreign substances filtered by the first filter (4130) may be larger than the size of foreign substances filtered by the second filter (4230).

[0136] The second filter (4230) may be a filter that filters small particles, such as microplastics. The pores of the second mesh (4232a) may be so small that they are difficult to see with the naked eye. By filtering microplastics generated during the washing process through the second filter (4230), environmental pollution can be minimized.

[0137] Meanwhile, FIG. 5 shows the coupling relationship between the second filter case (4220) and the second filter (4230).

[0138] The above filter unit (400) may further include at least one of a first sealing unit (4260), a first fastening unit (4270), a case cover (4240), a second sealing unit (4290), and a second fastening unit (4280).

[0139] The first fastening portion (4270) can connect the second handle (4210) and the filter frame (4231) placed inside the second filter case (4220). In addition, the sealing portion (4260) is a structure for sealing the first fastening portion (4270) and the second filter case (4220). For example, the first sealing portion (4260) can be an O-ring made of rubber or plastic.

[0140] The case cover (4240) shields one end of the second filter case (4220), and the one end of the second filter case (4220) is the opposite end to which the second handle (4210) is coupled.

[0141] The second sealing portion (4290) may be positioned between the second filter case (4220) and the case cover (4240) to seal the joint portion of the second filter case (4220) and the case cover (4240). For example, the second sealing portion (4290) may be formed of a rubber or plastic material and may have a shape corresponding to the case cover (4240).

[0142] The case cover (4240) may include a guide portion (4241) that guides the flow of fluid flowing into the second filter case (4220). The guide portion (4241) may guide the fluid flowing through the inlet (430) to flow toward the second filter (4230).

[0143] The second filter (4230) may be formed in a cylindrical shape extending in the longitudinal direction of the second filter case (4220), and the direction in which the second filter (4230) extends may be defined as a first direction. The guide portion (4241) may be formed to be inclined in a direction intersecting the first direction. More specifically, the guide portion (4241) may extend in a form in which the width narrows from the front surface of the case cover (4240), so that the cross-sectional shape may form a triangle. Accordingly, the fluid flowing into the second filter case (4220) through the inlet (430) may be gently guided toward the other end of the second filter case (4220) by the guide portion (4241), thereby reducing flow resistance.

[0144] Meanwhile, the second fastening portion (4280) can fix the second filter frame (4231) and the second filter case (4220) by combining them.

[0145] The second filter (4230) can be pulled out of the second filter case (4220) while the user holds the second handle (4210). The pulled out second filter (4230) can be discarded and a new filter can be mounted on the second filter case (4220), or the pulled out second filter (4230) can be washed and then mounted back inside the second filter case (4220).

[0146] Referring to FIG. 7, the filter unit (400) may further include a first pump (4150), a first pump housing (4155), a second pump (4250), and a second pump housing (4255).

[0147] The first pump (4150) may be a circulation pump for the flow of a circulation path, and the first pump housing (4155) may accommodate at least a part of the first pump (4150).

[0148] The first pump (4150) may include a first pump case and a first impeller accommodated within the first pump case. The first pump case forms the exterior of the first pump (4150) and protects internal components including the first impeller.

[0149] The second pump (4250) may be a drain pump for flowing fluid through a drainage channel and a cleaning channel, and the second pump housing (4255) may accommodate at least a portion of the second pump (4250). The second pump (4250) may include a second pump case and a second impeller accommodated inside the second pump case. The second pump case, like the first pump case, forms an exterior of the second pump (4250) and protects internal components including the second impeller.

[0150] Referring to FIG. 6, in a filter cleaning system according to another embodiment of the present invention, the second pipe (521) may include a body portion (5210) and a plurality of connecting portions (5211, 5212, 5213). Descriptions of the configurations illustrated in FIG. 6 that overlap with those of FIG. 5 will be omitted.

[0151] The body portion (5210) of the second pipe (521) is connected to the connector (600) and can extend from the connector (600) to the second filter case (4220). Here, the plurality of connecting portions (5211, 5212, 5213) may branch out from the body portion (5210) and extend into a plurality of branches, each having the same diameter. In addition, the plurality of connecting portions (5211, 5212, 5213) may each have different diameters.

[0152] The above second filter case (4220) may include a plurality of sleeves (4221, 4222, 4223) formed at positions corresponding to the number of the plurality of connecting portions (5211, 5212, 5213).

[0153] The number of the plurality of connecting parts (5211, 5212, 5213) and the plurality of sleeves (4221, 4222, 4223) is not limited to that shown in the drawing and may vary depending on the total area of ​​the filter or the internal space of the cabinet.

[0154] In addition, the washing unit (4233) may be provided in multiple units and may be formed to have a position and area corresponding to a plurality of sleeves (4221, 4222, 4223). Here, the corresponding area may mean having an area that is the same as or larger than the corresponding area.

[0155] The above washing unit (4233) may refer to a portion or area indicated by an arrow in the filtering unit (4232) in FIGS. 5 and 6. Meanwhile, the arrow in FIGS. 5 and 6 may indicate the flow direction of the fluid flowing into the second filter case (4220) through the second pipe (520, 521).

[0156] Additionally, the plurality of sleeves (4221, 4222, 4223) may be spaced apart from each other. In this case, the overlapping area between the plurality of washing sections (4233) may be minimized, thereby increasing the area to be washed in the filter.

[0157] FIG. 8 is a drawing showing a connector, which is a main component of the present invention, FIG. 9 is a longitudinal sectional view of FIG. 8, FIG. 10 is a longitudinal sectional view of another embodiment of a connector, which is a main component of the present invention, FIG. 11 is a longitudinal sectional view of another embodiment of a connector, which is a main component of the present invention, and FIG. 12 is a plan view of FIG. 8.

[0158] Referring to FIGS. 8 and 9, the connector (600) may include a main body (610) and a branch portion (620).

[0159] The main body (610) may have a lower portion that is connected to the first pipe (510). The main body (610) may have a hollow cylindrical shape that extends to a predetermined length.

[0160] The main body (610) may include an inlet (611) and an outlet (612). The inlet (611) may be accommodated inside the first pipe (510) while being coupled with the first pipe (510). Here, the inlet (611) may be formed so that its outer diameter becomes narrower toward the upstream side to facilitate coupling with the first pipe (510).

[0161] The above outlet (612) may be formed on the opposite side to the inlet (611), and the remaining fluid, excluding the fluid branched through the branch (620), among the fluid introduced through the first pipe (510), may be discharged.

[0162] The above outlet (612) can be formed so that the outer diameter becomes narrower as it goes toward the downstream side.

[0163] In addition, the outlet (612) may be connected to a drain pipe (200, see FIG. 1) for discharging washing water generated in the laundry treatment device (1) according to one embodiment of the present invention to the outside.

[0164] In the main body (610), a hole (615) may be formed to allow fluid to flow to the branch portion (620). The hole (615) may be formed in a shape and size corresponding to the cross-section of the branch portion (620).

[0165] The branch portion (620) extends from the main body portion (610) and can be extended so that the longitudinal axis forms a straight line.

[0166] The above branch portion (620) may include an inlet (621) coupled with the hole (615) and an outlet (622) formed on the opposite side to the inlet (621). With respect to the flow of the fluid, the inlet (621) may be on the upstream side, and the outlet (622) may be on the downstream side.

[0167] The outer diameter of the above outlet (622) may be formed to become narrower toward the downstream side so that it can be more easily coupled to the inside of the second pipe (520).

[0168] The second pipe (520) can accommodate at least a portion of the branch portion (620) including the outlet (622). Accordingly, the risk of leakage of the fluid flowing into the second pipe (520) through the branch portion (620) can be reduced.

[0169] For example, when the entire branch portion (620) is accommodated inside the second pipe (520), the branch portion (620) is not exposed to the outside when the second pipe (520) and the connector (600) are connected.

[0170] For example, the main body (610) and the branch portion (620) may be formed as a single body or may be formed separately and joined by welding.

[0171] Meanwhile, referring to FIG. 9, the connector (600) may further include a guide (630).

[0172] The above guide (630) is provided inside the connector (600) and can come into contact with the inner surface of the main body (610).

[0173] One end of the above guide (630) can come into contact with the inner surface of the main body (610) at a position adjacent to the hole (615).

[0174] The above guide (630) can be placed on the upper side based on the longitudinal axis along which the branch portion (620) extends.

[0175] Additionally, the guide (630) may extend parallel to the longitudinal axis of the branch portion (620). As an example, the guides (6301, 6302) may extend in a direction intersecting the longitudinal axis of the branch portion (620), as shown by the dotted line in FIG. 8.

[0176] Specifically, the guide (6301) according to another embodiment may be orthogonal to the direction in which the fluid flows. Furthermore, the guide according to another embodiment may be arranged to be inclined toward the upstream side in which the fluid flows.

[0177] The amount of fluid flowing into the branch section (620) can be determined depending on the slope direction and area of ​​the above guide (630, 6301, 6302).

[0178] For example, the guide (630) may be formed integrally with the main body (610) by injection molding. Alternatively, the guide (630) may be manufactured separately and joined to the inside of the main body (610) by welding or fitting.

[0179] Meanwhile, the main body (610) can be divided into an upstream portion and a downstream portion based on the center of the hole (615), and the upstream portion and the downstream portion can be defined as a first portion and a second portion, respectively.

[0180] The first part of the main body (610) may refer to a part from the inlet (611) to the center of the hole (615), and the second part of the main body (610) may refer to a part from the center of the hole (615) to the outlet (612).

[0181] And, the above guide (630) can be located in the second part.

[0182] Additionally, the guide (630) may be formed to form an acute angle with the inner surface of the second portion. In other words, the guide (630) may be arranged to slope toward the downstream side of the flow path. In this case, it is advantageous in terms of securing the recovery flow rate flowing to the branch portion (620).

[0183] Meanwhile, referring to FIG. 10, a connector (6001) according to another embodiment of the present invention may include a main body portion (6101) and a branch portion (6201). Descriptions overlapping with those of the connector (600) according to one embodiment of the present invention are omitted.

[0184] According to another embodiment of the present invention, a connector (6001) may have a branch portion (6201) extending from the main body portion (6101), and may extend in a longitudinal axis in a curved manner.

[0185] For example, the branch portion (6201) may branch off from the main body portion (6101), extend upward, and then change its extension direction to downward again. Here, the longitudinal axis may extend with a curvature.

[0186] Meanwhile, referring to FIG. 11, a connector (6002) according to another embodiment of the present invention may include a main body portion (6102) and a branch portion (6202).

[0187] According to another embodiment, the connector (6002) may have different diameters of the first and second portions of the main body (6102). For example, the diameter (a) of the first portion may be larger than the diameter (c) of the second portion.

[0188] The distance between the portion that is connected to the first portion of the branch portion (6202) and the downstream end of the branch portion (6202) (hereinafter defined as the first distance) may be shorter than the distance between the portion that is connected to the second portion of the branch portion (6202) and the downstream end of the branch portion (hereinafter defined as the second distance).

[0189] Accordingly, the portion corresponding to the difference between the first distance and the second distance can serve as the guide (630). In other words, the portion corresponding to the difference between the first distance and the second distance can guide the flow of the fluid flowing in from the first pipe (510) by branching it to the branch portion (6202).

[0190] The sum of the length (b) of the portion corresponding to the difference between the first distance and the second distance, which is projected onto a plane including the upstream end of the main body (6102), and the diameter (c) of the second portion may be equal to the diameter (a) of the first portion.

[0191] For example, the diameter (c) of the second portion may be larger than the length (b) that is a projection of the difference between the first and second distances. This is an example and is not limited thereto, and the length (b) that is a projection of the difference between the first and second distances may be the same as the diameter (c) of the second portion.

[0192] Meanwhile, referring to FIG. 12, the circumference of the guide (630) is made to be half or smaller than half of the inner circumference of the main body (610), so that it can come into contact with the inner circumference of the main body (610).

[0193] In detail, the area of ​​the guide (630) projected onto a plane including the end of the outlet (612) may be equal to or less than half of the area formed by the inner surface of the main body.

[0194] If the area of ​​the guide (630) projected onto a plane including the end of the outlet (612) is made to be half the area formed by the inner surface of the main body, it may be advantageous to secure the recovery flow toward the branch (620).

[0195] Additionally, the guide (630) and the branch portion (620) may be arranged on the same side with respect to the longitudinal axis of the main body.

[0196] FIG. 13 is a drawing showing one embodiment of a guide, which is a main component of the present invention, FIG. 14 is a drawing showing another embodiment of a guide, which is a main component of the present invention, and FIG. 15 is a drawing showing another embodiment of a guide, which is a main component of the present invention.

[0197] Referring to FIGS. 13 to 15, the guide (6300, 6301, 6302) according to the embodiment shown in each drawing may include a head portion (6310, 6311, 6312) and a support portion (6320, 6321, 6322).

[0198] The above head portion (6310, 6311, 6312) includes a first surface facing the upstream side of the fluid flowing through the connector (600), and a second surface facing the downstream side of the fluid flowing through the connector (600).

[0199] The above support portion (6320, 6321, 6322) can extend upstream from the first surface of the head portion (6310, 6311, 6312).

[0200] The above guides (6300, 6301, 6302) may have different recovery flow area secured depending on whether the resistance area of ​​the head portion (6310, 6311, 6312) is different or whether the contact position between the first surface of the head portion (6310, 6311, 6312) and the support portion (6320, 6321, 6322) is different.

[0201] Referring to FIG. 13, in a guide (6300) according to one embodiment, the head portion (6310) and the support portion (6320) can come into contact at a position where the area of ​​the head portion (6310) can be divided into two parts based on the support portion (6320).

[0202] Referring to FIG. 14, in the guide (6301) according to the other embodiment, the support portion (6321) may be positioned at a position where the area on the branch portion (620) side is larger than the area on the side opposite to the branch portion (620), based on the position where the support portion (6321) and the head portion (6311) come into contact.

[0203] Referring to FIG. 15, in a guide (6302) according to another embodiment, the support portion (6322) may be arranged so that the support portion (6322) is in contact with one end of the head portion (6312) facing the branch portion (620) and the other end facing the branch portion (620).

[0204] FIG. 16 is a longitudinal cross-sectional view of a connector and a guide, which are the main components of the present invention, and is a drawing showing the arrangement relationship and flow of the connector and the guide according to one embodiment, FIG. 17 is a longitudinal cross-sectional view of a connector and a guide, which are the main components of the present invention, and is a drawing showing the arrangement relationship of the connector and the guide according to another embodiment, and FIG. 18 is a longitudinal cross-sectional view of a connector and a guide, which are the main components of the present invention, and is a drawing showing the arrangement relationship of the connector and the guide according to yet another embodiment.

[0205] Referring to FIGS. 16 to 18, as described above, the main body (610) may include a first part on the upstream side of the flow path and a second part on the downstream side of the flow path.

[0206] The fluid flowing into the inlet (611) of the main body (610) may be divided into a flow path flowing to the branch (620) and a flow path heading to the outlet (612) of the main body as it collides with the guide (630).

[0207] Referring to FIG. 16, when examining the connector (600) and guide (630) according to one embodiment of FIG. 16, one end of the guide (630) may be placed on the upstream side based on the center of the hole (615).

[0208] When looking at the connector (600) and guide (630) according to another embodiment of FIG. 17, one end of the guide (630) can be placed at the center of the hole (615) based on the center of the hole (615).

[0209] Additionally, in another embodiment, one end of the guide (630) facing the branch portion (620) may be positioned on an extension of the longitudinal axis of the branch portion (620).

[0210] For example, in another embodiment, the branch portion (620) may be formed to reduce the diameter of the branch portion (620) so that one end of the guide (630) facing the branch portion (620) comes into contact with the inner surface of the branch portion (620).

[0211] In addition, when looking at the connector (600) and guide (630) according to another embodiment of FIG. 18, one end of the guide (630) may be placed on the downstream side with respect to the center of the hole (615).

[0212] Here, the recovery flow rate flowing into the branch portion (620) that can be secured may vary depending on the performance of the second pump (4250), the diameter of the main body (610), the diameter of the branch portion (620), and the position of the guide (630) disclosed in FIGS. 16 to 18.

[0213] When the main body (610) and guide (630) are manufactured separately and combined by inserting them, the guide (630) can be manufactured and applied according to the specifications of the filter washing system or laundry treatment device in which the connector (600) is used.

[0214] Meanwhile, the head portion (6310, 6311, 6312) and the support portion (6320, 6321, 6322) are exemplary and may have different shapes, and the guide (630) may include only a configuration corresponding to the head portion as illustrated in FIGS. 8 to 12.

[0215] In this case, the surface facing the upstream side of the guide (630) corresponds to the first surface and can directly collide with the fluid introduced through the first pipe (510).

[0216] Meanwhile, Fig. 19 is a drawing showing gas flowing within a connector, which is a main component of the present invention.

[0217] Referring to Fig. 19, depending on the flow of fluid along the connector (600), gas contained within the fluid may be positioned upward to form an air chamber. This phenomenon occurs due to the difference in density between the fluid and gas, and drainage performance may vary depending on the presence or absence and size of the air chamber.

[0218] In particular, the water level can drop to the bottom of the filter case (4120, 4220) during a cycle in which at least one of the washing cycle, the rinsing cycle, and the draining cycle is repeated at least once in the filter washing system or when the laundry treatment device (1) is a washing machine.

[0219] In this case, if gas is trapped inside the filter case (4120, 4220) and the gas is not completely discharged, gas may be continuously mixed in the pump, resulting in a decrease in pump head capacity.

[0220] And, the gas is discharged together with the fluid from the second filter (4230), and depending on the installation type of the connector, the gas inside the fluid may be circulated again along the branch section (620) or discharged to the outside.

[0221] In order for the gas contained in the fluid of the present invention to be discharged without circulating along the branch portion (620), the branch portion (620) may extend downward. In other words, the branch portion (620) may extend downward regardless of the extension direction of the main body portion (610).

[0222] Additionally, the branch portion (620) may extend in a direction intersecting the longitudinal direction of the main body portion (610).

[0223] This may be the same even if the main body (610) extends in a vertical or horizontal direction, and may also be the same even if the main body (610) is arranged to be inclined with respect to the Z-axis direction.

[0224] Additionally, the branch portion (620) may be formed to form an acute angle with the first portion of the main body portion (610).

[0225] Specifically, when the main body (610) extends in a vertical direction, the branch portion (620) can extend downward from the side of the main body (610).

[0226] In addition, when the main body (610) extends in a horizontal direction, the branch portion (620) may extend downward from a side of the main body (610) that is located lower than the longitudinal central axis of the main body (610) among the side surfaces of the main body (610).

[0227] In this case, the branch portion (620) may form an acute angle with the first portion, an acute angle with the second portion, or may extend to form a 90 degree angle with the first portion and the second portion.

[0228] Meanwhile, the main body (610) can determine the extension direction so as to avoid interference with the structure inside the cabinet (100), and can be arranged so that the longitudinal axis of the main body (610) and the Z-axis intersect and are inclined.

[0229] According to this, the air chamber can be minimized to facilitate drainage and prevent performance degradation of the pump.

[0230] According to the filter cleaning system and the laundry treatment device (1) including the same according to an embodiment of the present invention, the filter can be cleaned by recovering and reusing at least a portion of the fluid discharged through the first pipe (510) through the second pipe (520).

[0231] The fluid flowing along the second pipe (520) can strike the surface of the filter to delay the accumulation of foreign substances in the filter during drainage.

[0232] In addition, the water level inside the filter may drop and the internal pressure may decrease at a point before drainage is completed, and as the surface of the filter described above is struck, the lumps of foreign substances accumulated on the surface of the filter can be effectively separated.

[0233] The surface of the filter may refer to the outer surface or inner surface of the filter. When either the outer surface or inner surface of the filter is struck, a lump of foreign matter accumulated on the other side of the filter, either the outer surface or inner surface, may be separated.

[0234] According to this, the problem of the filter surface becoming clogged and drainage performance deteriorating as drainage proceeds through the filter can be improved.

[0235] Meanwhile, the above-described advantages may be more effective if the filter is a filter that removes microplastics.

[0236] In addition, in the above filter washing, the recovery path flowing through the second pipe (520) can save water by reusing the fluid of the drain path flowing through the first pipe (510).

[0237] In addition, since the cleaning of the filter is performed sequentially and simultaneously with the progress of drainage, the risk of drainage stopping due to filter clogging is reduced, and as the life of the filter is extended, the frequency of filter replacement and cleaning by the user can be reduced.

Claims

1. Filter to filter out foreign substances; A filter case accommodating the above filter; A drainage path through which the fluid filtered of foreign substances by the above filter is drained; and A filter cleaning system comprising a return channel connected to the drain channel and provided so that at least a portion of the fluid flowing through the drain channel flows into the filter case.

2. In paragraph 1, The above drainage path is, First pipe connected to the above filter case; and Including a connector connected to the first pipe, The above recovery path includes a second pipe connected to the filter case, A filter cleaning system, characterized in that the second pipe is connected to one of the first pipe and the connector.

3. In paragraph 2, The above connector, A main body connected to the first pipe; and A filter cleaning system including a branch portion branched from the main body portion and connected to the second pipe.

4. In paragraph 3, The above main body part, An inlet portion coupled with the first pipe; an extension extending from the above inlet; and Includes an outlet located on the opposite side of the inlet of the above extension, The above extension part, A filter cleaning system characterized in that a hole is formed through which a fluid passes in communication with the branch section.

5. In paragraph 3, The above branch, A filter cleaning system characterized in that it extends from the main body in a direction intersecting the longitudinal direction of the main body.

6. In paragraph 5, The above branch, A filter cleaning system characterized in that it extends downward from the side of the main body.

7. In paragraph 6, The above main body portion extends in a horizontal direction, The above branch, A filter cleaning system characterized in that it extends from a side surface of the main body portion located lower than the longitudinal axis of the main body portion.

8. In paragraph 7, The above branch, A filter cleaning system characterized in that it extends at an angle so as to form an acute angle with the longitudinal axis of the main body.

9. In paragraph 6, The above main body part extends in the vertical direction, A filter washing system characterized in that the branch portion extends so as to be inclined toward the upstream side of the main body portion.

10. In paragraph 9, The above main body part, A filter cleaning system characterized in that the longitudinal axis of the main body is extended obliquely so as to form an acute angle with the direction of gravity.

11. In paragraph 3, Further comprising a guide disposed inside the connector; The above guide is, A filter cleaning system characterized in that it is connected to the main body and guides at least a portion of the water flowing into the main body to flow to the branch.

12. In paragraph 11, The above guide is, A filter cleaning system characterized in that it is arranged on the upper side based on the longitudinal axis of the above branch portion.

13. In paragraph 11, Part of the above guide is, In contact with the inner surface of the above main body, Or arranged so as to be parallel to the extension line of the longitudinal axis of the above branch portion, A filter cleaning system characterized in that it is arranged to intersect the extension line of the longitudinal axis of the above branch portion.

14. In paragraph 11, The above guide is, A head portion extending in a direction intersecting with the extension direction of the main body portion; and A filter cleaning system including a support portion extending from the head portion toward the upstream side based on the direction of water flow.

15. In paragraph 2, The above filter case, It includes a sleeve extending in a direction intersecting the longitudinal direction of the filter case, At the other end of the second pipe opposite to the end where the second pipe is connected to the drainage channel, a connecting portion is formed in a shape corresponding to the sleeve and is connected thereto. The above filter is, It includes a washing unit that is washed by water introduced through the second pipe, The above washing part, A filter cleaning system characterized in that it is positioned to correspond to the above sleeve.

16. In paragraph 15, The above-mentioned joint and the above-mentioned sleeve are each provided in multiple numbers, A filter washing system characterized in that the washing sections are formed in a plurality of pieces spaced apart from each other.

17. In paragraph 15, The above filter is, A filter unit that filters out foreign substances; and Includes a frame that supports the outer shape of the above filter unit, A filter washing system characterized in that the washing unit is formed on the surface of the filter unit.

18. Cabinet; A tub housed within the cabinet and storing washing water; A drum located within the tub and containing laundry; A laundry treatment device comprising a filter washing system according to any one of claims 1 to 17.

19. In paragraph 18, A laundry treatment device further comprising a pump for flowing fluid within the drainage path and the return path.

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